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WO2025024953A1 - Signalisation pour transferts de mobilité déclenchés par une couche inférieure - Google Patents

Signalisation pour transferts de mobilité déclenchés par une couche inférieure Download PDF

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Publication number
WO2025024953A1
WO2025024953A1 PCT/CN2023/109751 CN2023109751W WO2025024953A1 WO 2025024953 A1 WO2025024953 A1 WO 2025024953A1 CN 2023109751 W CN2023109751 W CN 2023109751W WO 2025024953 A1 WO2025024953 A1 WO 2025024953A1
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WO
WIPO (PCT)
Prior art keywords
cell
candidate
indication
control signaling
candidate cells
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2023/109751
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English (en)
Inventor
Fang Yuan
Yan Zhou
Jelena Damnjanovic
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Qualcomm Inc
Original Assignee
Qualcomm Inc
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Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Priority to PCT/CN2023/109751 priority Critical patent/WO2025024953A1/fr
Publication of WO2025024953A1 publication Critical patent/WO2025024953A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements

Definitions

  • the following relates to wireless communications, including signaling for lower layer triggered mobility handovers.
  • Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) .
  • Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems.
  • 4G systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems
  • 5G systems which may be referred to as New Radio (NR) systems.
  • a wireless multiple-access communications system may include one or more base stations, each supporting wireless communication for communication devices, which may be known as user equipment (UE) .
  • UE user equipment
  • the described techniques relate to improved methods, systems, devices, and apparatuses that support signaling for lower layer triggered mobility handovers.
  • the described techniques provide for a user equipment (UE) to receive control signaling from a serving cell connected with the UE.
  • the control signaling may indicate information for a lower layer mobility triggered handover procedure.
  • the control signaling may include information for acquiring timing advance values from a set of candidate cells, information associated with measuring a signal quality of one or more reference signals of a set of reference signals from the set of candidate cells, information associated with beamforming parameters for the set of candidate cells, or a combination thereof.
  • the UE may then select a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the information indicated via the control signaling. As such, the UE may receive a cell switch command from the serving cell to connect with the selected candidate cell.
  • a method for wireless communications by a UE may include receiving, from a serving cell connected with the UE, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure, selecting, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the timing advance values from the set of candidate cells, and receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the UE may include one or more memories storing processor executable code, and one or more processors coupled with the one or more memories.
  • the one or more processors may individually or collectively operable to execute the code to cause the UE to receive, from a serving cell connected with the UE, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure, select, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the timing advance values from the set of candidate cells, and receive, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the UE may include means for receiving, from a serving cell connected with the UE, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure, means for selecting, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the timing advance values from the set of candidate cells, and means for receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • a non-transitory computer-readable medium storing code for wireless communications is described.
  • the code may include instructions executable by a processor to receive, from a serving cell connected with the UE, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure, select, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the timing advance values from the set of candidate cells, and receive, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, via the control signaling, an indication of whether the UE acquires a timing advance value of the candidate cell before receiving the cell switch command by UE-measurements of reference signals, by random access procedures, or both, where selecting the candidate cell may be based on receiving the indication.
  • Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, via the control signaling, an indication that the timing advance values may be based on a reception time difference between the serving cell and a respective candidate cell and a timing advance value for the serving cell, where selecting the candidate cell may be based on receiving the indication.
  • Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for measuring a reception time difference between a first reception time of a first signal received from the serving cell and a second reception time of a second signal from the candidate cell and determining a timing advance value of the candidate cell based on a second timing advance value of the serving cell and the reception time difference, where selecting the candidate cell may be based on determining the timing advance value of the candidate cell.
  • Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, via the control signaling, an indication of resources for performing a random access procedure with the set of candidate cells to acquire the timing advance values of the set of candidate cells, where selecting the candidate cell may be based on receiving the indication.
  • control signaling includes downlink control information and includes an identifier of the candidate cell.
  • Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving a synchronization signal block from a respective candidate cell via the resources included in the indication and determining a timing advance value of the respective candidate cell based on receiving the synchronization signal block from the respective candidate cell, where selecting the candidate cell may be based on determining the timing advance value of the respective candidate cell.
  • receiving the control signaling may include operations, features, means, or instructions for receiving, via the control signaling, an indication of whether the serving cell, the candidate cells from the set of candidate cells, or both, may be to transmit a random access response in response to a random access preamble from the UE as part of acquiring the timing advance values using the random access procedure.
  • the cell switch command includes a timing advance value for a respective candidate cell in response to the control signaling indicating that the serving cell and the set of candidate cells may be to refrain from transmitting the random access response.
  • Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, to the serving cell, an indication of a maximum quantity of timing advance values for different cells that the UE may be capable of storing, where receiving the control signaling may be based on transmitting the indication.
  • a method for wireless communications by a UE may include receiving, from a serving cell connected with the UE, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure, selecting, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells, and receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the UE may include one or more memories storing processor executable code, and one or more processors coupled with the one or more memories.
  • the one or more processors may individually or collectively operable to execute the code to cause the UE to receive, from a serving cell connected with the UE, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure, select, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells, and receive, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the UE may include means for receiving, from a serving cell connected with the UE, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure, means for selecting, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells, and means for receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • a non-transitory computer-readable medium storing code for wireless communications is described.
  • the code may include instructions executable by a processor to receive, from a serving cell connected with the UE, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure, select, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells, and receive, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving the set of reference signals from the set of candidate cells and measuring the signal quality of one or more references signals of the set of reference signals based on receiving the set of reference signals, where selecting the candidate cell from the set of candidate cells may be based on the signal quality of the one or more reference signals of the set of reference signals.
  • Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, via the control signaling, parameters used to measure the signal quality of the one or more reference signals of the set of reference signals, where selecting the candidate cell may be based on the signal quality measurements.
  • the parameters include a physical cell identifier for the candidate cell, a logical identifier of the candidate cell, an indication of time domain resources associated with the one or more reference signals, a periodicity of the one or more reference signals, a subframe offset, a center frequency of the one or more reference signals, a subcarrier spacing of the one or more reference signals, or any combination thereof.
  • the parameters include an indication of whether the UE may be capable of measuring a set of multiple reference signals concurrently, an indication associated with a measurement gap, a quantity of measurement gaps, a minimum size of the measurement gap, a maximum size of the measurement gap, and indication of whether the set of reference signals may be outside of a bandwidth part, or any combination thereof.
  • a frequency band of the one or more reference signals may be the same as a frequency band being used by the candidate cell and the signal quality measurements may be intra-frequency measurements.
  • a frequency band of the one or more reference signals may be different than a frequency band being used by the candidate cell and the signal quality measurements may be inter-frequency measurements.
  • Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, via the control signaling, an indication of a maximum quantity of reference signals to be measured from the set of reference signals from the set of candidate cells.
  • Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, via the control signaling, parameters associated with transmitting a beam report for selecting beams from a set of beams of one or more candidate cells of the set of candidate cells and receiving, via the cell switch command, an indication of one or more beams from the set of beams, the one or more beams being associated with the selected candidate cell.
  • Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, to the serving cell, the beam report indicating a quantity of beams from the set of beams for a quantity of candidate cells from the set of candidate cells and receiving, via the cell switch command, an indication of one or more beams from the set of beams associated with the selected candidate cell indicated based as least in part on transmitting the beam report.
  • the set of reference signals include synchronization signal blocks.
  • a method for wireless communications by a UE may include receiving, from a serving cell connected with the UE, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure, selecting a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the beamforming parameters, and receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the UE may include one or more memories storing processor executable code, and one or more processors coupled with the one or more memories.
  • the one or more processors may individually or collectively operable to execute the code to cause the UE to receive, from a serving cell connected with the UE, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure, select a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the beamforming parameters, and receive, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the UE may include means for receiving, from a serving cell connected with the UE, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure, means for selecting a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the beamforming parameters, and means for receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • a non-transitory computer-readable medium storing code for wireless communications is described.
  • the code may include instructions executable by a processor to receive, from a serving cell connected with the UE, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure, select a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the beamforming parameters, and receive, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, via the control signaling, an indication of one or more parameters associated with the lower layer mobility triggered handover procedure, where selecting the candidate cell may be based on the one or more parameters.
  • the one or more parameters include information to identify a target candidate cell from the set of candidate cells, timing advance information, an indication of a joint or pair of beamforming parameters for the target candidate cell, an indication of set of active downlink bandwidth parts and a set of active uplink bandwidth parts, a set of triggers for receiving reference signals from the target candidate cell, a set of triggers for transmitting a beam management report to the target candidate cell, a trigger for transmitting a channel state information report, a trigger for initiating a contention-based random access procedure, an indication of a network identifier of the target candidate cell, or any combination thereof.
  • Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, via the cell switch command, an indication of an activation of the beamforming parameters based on receiving the control signaling, where the UE connects with the selected candidate cell based on the activation of the beamforming parameters.
  • Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, prior to receiving the cell switch command, an indication of an activation of the beamforming parameters based on receiving the control signaling where the UE connects with the selected candidate cell based on the activation of the beamforming parameters.
  • Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, via the control signaling, a beam indication for a subset of candidate cells within the set of candidate cells and an activation of a beam included in the beam indication for the candidate cell, where selecting of the candidate cell may be based on the beam indication.
  • the beam indication includes a maximum quantity of activated beamforming parameters per candidate cell of the set of candidate cells, a maximum quantity of activated beamforming parameters for the set of candidate cells across a set of carrier components, a maximum quantity of activated beamforming parameters for the serving cell and the set of candidate cells, a beamforming parameter type per candidate cell of set of candidate cells, a maximum quantity of configured beamforming parameters per candidate cell of the set of candidate cells, a maximum quantity of configured beamforming parameters across the set of candidate cells, a maximum quantity of component carrier lists for the beam indication, a maximum quantity of configured candidate cells for beamforming parameter activation, or any combination thereof.
  • Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, via the control signaling, an indication for the UE to synchronize downlink signaling with one or more candidate cells from the set of candidate cells, where the candidate cell may be selected from the one or more candidate cells based on the UE being synchronized with the one or more candidate cells.
  • Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, from the set of candidate cells, a set of reference signals for synchronization with the set of candidate cells, where the set of reference signals may be received prior to the cell switch command, synchronizing with one or more candidate cells of the set of candidate cells based on receiving the set of reference signals from the one or more candidate cells, and selecting the candidate cell from the one or more candidate cells based on the UE being synchronized with the candidate cell.
  • Some examples of the method, UEs, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, via the control signaling, an indication of a set of beam application times associated with one or more candidate cells from the set of candidate cells, where a respective beam application time of a respective candidate cell may be the same as a second beam application time associated with the serving cell or may be different from the second beam application time, and where selecting the candidate cell may be based on the set of beam application times.
  • a method for wireless communications by a network entity may include transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure, receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the timing advance values from the set of candidate cells, and transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on the indication of the selected candidate cell.
  • the network entity may include one or more memories storing processor executable code, and one or more processors coupled with the one or more memories.
  • the one or more processors may individually or collectively operable to execute the code to cause the network entity to transmit, to a UE connected with a serving cell of the network entity, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure, receive, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the timing advance values from the set of candidate cells, and transmit, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on the indication of the selected candidate cell.
  • the network entity may include means for transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure, means for receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the timing advance values from the set of candidate cells, and means for transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on the indication of the selected candidate cell.
  • a non-transitory computer-readable medium storing code for wireless communications is described.
  • the code may include instructions executable by a processor to transmit, to a UE connected with a serving cell of the network entity, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure, receive, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the timing advance values from the set of candidate cells, and transmit, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on the indication of the selected candidate cell.
  • Some examples of the method, network entities, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, via the control signaling, an indication of whether the UE acquires a timing advance value of the candidate cell before receiving the cell switch command by UE-measurements of reference signals, by random access procedures, or both, where the indication of the selection of the candidate cell may be based on receiving the indication.
  • Some examples of the method, network entities, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, via the control signaling, an indication that the timing advance values may be based on a reception time difference between the serving cell and a respective candidate cell and a timing advance value for the serving cell, where the indication of the selection of the candidate cell may be based on receiving the indication.
  • Some examples of the method, network entities, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, via the control signaling, an indication of resources for performing a random access procedure with the set of candidate cells to acquire the timing advance values of the set of candidate cells, where the indication of the selection of the candidate cell may be based on receiving the indication.
  • control signaling includes downlink control information and includes an identifier of the candidate cell.
  • receiving the control signaling may include operations, features, means, or instructions for transmitting, via the control signaling, an indication of whether the serving cell, the candidate cells from the set of candidate cells, or both, may be to transmit a random access response in response to a random access preamble from the UE as part of acquiring the timing advance values using the random access procedure.
  • the cell switch command includes a timing advance value for a respective candidate cell in response to the control signaling indicating that the serving cell and the set of candidate cells may be to refrain from transmitting the random access response.
  • Some examples of the method, network entities, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, from the UE, an indication of a maximum quantity of timing advance values for different cells that the UE may be capable of storing, where transmitting the control signaling may be based on receiving the indication.
  • a method for wireless communications by a network entity may include transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure, receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells, and transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on the indication of the selected candidate cell.
  • the network entity may include one or more memories storing processor executable code, and one or more processors coupled with the one or more memories.
  • the one or more processors may individually or collectively operable to execute the code to cause the network entity to transmit, to a UE connected with a serving cell of the network entity, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure, receive, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells, and transmit, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on the indication of the selected candidate cell.
  • the network entity may include means for transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure, means for receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells, and means for transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on the indication of the selected candidate cell.
  • a non-transitory computer-readable medium storing code for wireless communications is described.
  • the code may include instructions executable by a processor to transmit, to a UE connected with a serving cell of the network entity, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure, receive, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells, and transmit, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on the indication of the selected candidate cell.
  • Some examples of the method, network entities, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, via the control signaling, parameters used to measure the signal quality of the one or more reference signals of the set of reference signals, where the indication of the selection of the candidate cell may be based on the signal quality measurements.
  • the parameters include a physical cell identifier for the candidate cell, a logical identifier of the candidate cell, an indication of time domain resources associated with the one or more reference signals, a periodicity of the one or more reference signals, a subframe offset, a center frequency of the one or more reference signals, a subcarrier spacing of the one or more reference signals, or any combination thereof.
  • the parameters include an indication of whether the UE may be capable of measuring a set of multiple reference signals concurrently, an indication associated with a measurement gap, a quantity of measurement gaps, a minimum size of the measurement gap, a maximum size of the measurement gap, and indication of whether the set of reference signals may be outside of a bandwidth part, or any combination thereof.
  • a frequency band of the one or more reference signals may be the same as a frequency band being used by the candidate cell and the signal quality measurements may be intra-frequency measurements.
  • a frequency band of the one or more reference signals may be different than a frequency band being used by the candidate cell and the signal quality measurements may be inter-frequency measurements.
  • Some examples of the method, network entities, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, via the control signaling, an indication of a maximum quantity of reference signals to be measured from the set of reference signals from the set of candidate cells.
  • Some examples of the method, network entities, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, via the control signaling, parameters associated with the UE transmitting a beam report for selecting beams from a set of beams of one or more candidate cells of the set of candidate cells and transmitting, via the cell switch command, an indication of one or more beams from the set of beams, the one or more beams being associated with the selected candidate cell.
  • Some examples of the method, network entities, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for receiving, from the UE, the beam report indicating a quantity of beams from the set of beams for a quantity of candidate cells from the set of candidate cells and transmitting, via the cell switch command, an indication of one or more beams from the set of beams associated with the selected candidate cell indicated based as least in part on receiving the beam report.
  • the set of reference signals include synchronization signal blocks.
  • a method for wireless communications by a network entity may include transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure, receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the beamforming parameters, and transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on selecting the candidate cell.
  • the network entity may include one or more memories storing processor executable code, and one or more processors coupled with the one or more memories.
  • the one or more processors may individually or collectively operable to execute the code to cause the network entity to transmit, to a UE connected with a serving cell of the network entity, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure, receive, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the beamforming parameters, and transmit, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on selecting the candidate cell.
  • the network entity may include means for transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure, means for receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the beamforming parameters, and means for transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on selecting the candidate cell.
  • a non-transitory computer-readable medium storing code for wireless communications is described.
  • the code may include instructions executable by a processor to transmit, to a UE connected with a serving cell of the network entity, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure, receive, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the beamforming parameters, and transmit, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on selecting the candidate cell.
  • Some examples of the method, network entities, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, via the control signaling, an indication of one or more parameters associated with the lower layer mobility triggered handover procedure, where the indication of the selection of the candidate cell may be based on the one or more parameters.
  • the one or more parameters include information to identify a target candidate cell from the set of candidate cells, timing advance information, an indication of a joint or pair of beamforming parameters for the target candidate cell, an indication of set of active downlink bandwidth parts and a set of active uplink bandwidth parts, a set of triggers for receiving reference signals from the target candidate cell, a set of triggers for transmitting a beam management report to the target candidate cell, a trigger for transmitting a channel state information report, a trigger for initiating a contention-based random access procedure, an indication of a network identifier of the target candidate cell, or any combination thereof.
  • Some examples of the method, network entities, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, via the cell switch command, an indication of an activation of the beamforming parameters based on receiving the control signaling, where the UE may be to connect with the selected candidate cell based on the activation of the beamforming parameters.
  • Some examples of the method, network entities, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, prior to transmitting the cell switch command, an indication of an activation of the beamforming parameters based on receiving the control signaling where the UE may be to connect with the selected candidate cell based on the activation of the beamforming parameters.
  • Some examples of the method, network entities, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, via the control signaling, a beam indication for a subset of candidate cells within the set of candidate cells and an activation of a beam included in the beam indication for the candidate cell, where the indication of the selection of the candidate cell may be based on the beam indication.
  • the beam indication includes a maximum quantity of activated beamforming parameters per candidate cell of the set of candidate cells, a maximum quantity of activated beamforming parameters for the set of candidate cells across a set of carrier components, a maximum quantity of activated beamforming parameters for the serving cell and the set of candidate cells, a beamforming parameter type per candidate cell of set of candidate cells, a maximum quantity of configured beamforming parameters per candidate cell of the set of candidate cells, a maximum quantity of configured beamforming parameters across the set of candidate cells, a maximum quantity of component carrier lists for the beam indication, a maximum quantity of configured candidate cells for beamforming parameter activation, or any combination thereof.
  • Some examples of the method, network entities, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, via the control signaling, an indication for the UE to synchronize downlink signaling with one or more candidate cells from the set of candidate cells, where the indication of the selection of the candidate cell may be based on the UE being synchronized with the one or more candidate cells.
  • Some examples of the method, network entities, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, via the control signaling, an indication of a set of beam application times associated with one or more candidate cells from the set of candidate cells, where a respective beam application time of a respective candidate cell may be the same as a second beam application time associated with the serving cell or may be different from the second beam application time, and where the indication of the selection of the candidate cell may be based on the set of beam application times.
  • FIG. 1 shows an example of a wireless communications system that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • FIG. 2 shows an example of a wireless communications system that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • FIG. 3 shows an example of a process flow that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • FIG. 4 shows an example of a wireless communications system that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • FIG. 5 shows an example of a process flow that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • FIG. 6 shows an example of a wireless communications system that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • FIG. 7 shows an example of a process flow that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • FIGs. 8 and 9 show block diagrams of devices that support signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • FIG. 10 shows a block diagram of a communications manager that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • FIGs. 12 and 13 show block diagrams of devices that support signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • FIG. 14 shows a block diagram of a communications manager that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • FIG. 15 shows a diagram of a system including a device that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • FIGs. 16 through 26 show flowcharts illustrating methods that support signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • UEs may use level 3 (L3) signaling to perform handover procedures from a source serving cell to a candidate cell.
  • L3 level 3
  • the UE may receive a cell switch command to switch to a candidate cell and then after receiving the cell switch command the UE may begin to initiate the handover procedure from the source serving cell to the candidate cell.
  • the handover procedure may include the UE acquiring a timing advance from the candidate cell, activating a transmission configuration indication (TCI) state associated with the candidate cell, performing measurements on reference signals from the candidate cell, among others.
  • TCI transmission configuration indication
  • performing such techniques in such an order may increase the latency associated with performing the handover procedure, which may in turn reduce the reliability of the wireless communications system.
  • the techniques of the present disclosure describe enhancements to UE capabilities where the UE may be capable of performing timing advance acquisitions, TCI state activations, and reference signal measurements for the candidate cells before receiving a cell switch command.
  • the UE may be capable of acquiring timing advance values from a set of candidate cells before selecting a candidate cell and receiving a cell switch command.
  • the UE may use the timing advance values of the candidate cells as a factor for selecting a candidate cell to connect with.
  • the UE may be capable of activating a TCI state of a candidate cell before receiving the cell switch command, which may aid in reducing the latency associated with the handover procedure.
  • the UE may be capable of performing signal quality measurements on reference signals received from the candidate cells to aid in more accurately selecting a candidate cell to connect with.
  • the techniques of the present disclosure describe techniques for enhancing UE capabilities to perform procedures related to handovers before receiving a cell switch command to aid in more accurately selecting candidate cells to have the UE connect with, reduce latency of the handover procedure, and increase the reliability of the wireless communications system.
  • aspects of the disclosure are initially described in the context of wireless communications systems. Additional aspects of the disclosure are described herein with reference to wireless communications systems and process flows. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to signaling for lower layer triggered mobility handovers.
  • FIG. 1 shows an example of a wireless communications system 100 that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • the wireless communications system 100 may include one or more network entities 105, one or more UEs 115, and a core network 130.
  • the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-APro network, a New Radio (NR) network, or a network operating in accordance with other systems and radio technologies, including future systems and radio technologies not explicitly mentioned herein.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-APro LTE-APro
  • NR New Radio
  • the network entities 105 may be dispersed throughout a geographic area to form the wireless communications system 100 and may include devices in different forms or having different capabilities.
  • a network entity 105 may be referred to as a network element, a mobility element, a radio access network (RAN) node, or network equipment, among other nomenclature.
  • network entities 105 and UEs 115 may wirelessly communicate via one or more communication links 125 (e.g., a radio frequency (RF) access link) .
  • a network entity 105 may support a coverage area 110 (e.g., a geographic coverage area) over which the UEs 115 and the network entity 105 may establish one or more communication links 125.
  • the coverage area 110 may be an example of a geographic area over which a network entity 105 and a UE 115 may support the communication of signals according to one or more radio access technologies (RATs) .
  • RATs radio access technologies
  • the UEs 115 may be dispersed throughout a coverage area 110 of the wireless communications system 100, and each UE 115 may be stationary, or mobile, or both at different times.
  • the UEs 115 may be devices in different forms or having different capabilities. Some example UEs 115 are illustrated in FIG. 1.
  • the UEs 115 described herein may be capable of supporting communications with various types of devices, such as other UEs 115 or network entities 105, as shown in FIG. 1.
  • a node of the wireless communications system 100 which may be referred to as a network node, or a wireless node, may be a network entity 105 (e.g., any network entity described herein) , a UE 115 (e.g., any UE described herein) , a network controller, an apparatus, a device, a computing system, one or more components, or another suitable processing entity configured to perform any of the techniques described herein.
  • a node may be a UE 115.
  • a node may be a network entity 105.
  • a first node may be configured to communicate with a second node or a third node.
  • One or more of the network entities 105 described herein may include or may be referred to as a base station 140 (e.g., a base transceiver station, a radio base station, an NR base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation NodeB or a giga-NodeB (either of which may be referred to as a gNB) , a 5G NB, a next-generation eNB (ng-eNB) , a Home NodeB, a Home eNodeB, or other suitable terminology) .
  • a base station 140 e.g., a base transceiver station, a radio base station, an NR base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation NodeB or a giga-NodeB (either of which may be
  • a network entity 105 may be implemented in an aggregated (e.g., monolithic, standalone) base station architecture, which may be configured to utilize a protocol stack that is physically or logically integrated within a single network entity 105 (e.g., a single RAN node, such as a base station 140) .
  • a network entity 105 may be implemented in a disaggregated architecture (e.g., a disaggregated base station architecture, a disaggregated RAN architecture) , which may be configured to utilize a protocol stack that is physically or logically distributed among two or more network entities 105, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance) , or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN) ) .
  • IAB integrated access backhaul
  • O-RAN open RAN
  • vRAN virtualized RAN
  • C-RAN cloud RAN
  • a network entity 105 may include one or more of a central unit (CU) 160, a distributed unit (DU) 165, a radio unit (RU) 170, a RAN Intelligent Controller (RIC) 175 (e.g., a Near-Real Time RIC (Near-RT RIC) , a Non-Real Time RIC (Non-RT RIC) ) , a Service Management and Orchestration (SMO) 180 system, or any combination thereof.
  • An RU 170 may also be referred to as a radio head, a smart radio head, a remote radio head (RRH) , a remote radio unit (RRU) , or a transmission reception point (TRP) .
  • One or more components of the network entities 105 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 105 may be located in distributed locations (e.g., separate physical locations) .
  • one or more network entities 105 of a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU) , a virtual DU (VDU) , a virtual RU (VRU) ) .
  • VCU virtual CU
  • VDU virtual DU
  • VRU virtual RU
  • the split of functionality between a CU 160, a DU 165, and an RU 170 is flexible and may support different functionalities depending on which functions (e.g., network layer functions, protocol layer functions, baseband functions, RF functions, and any combinations thereof) are performed at a CU 160, a DU 165, or an RU 170.
  • functions e.g., network layer functions, protocol layer functions, baseband functions, RF functions, and any combinations thereof
  • a functional split of a protocol stack may be employed between a CU 160 and a DU 165 such that the CU 160 may support one or more layers of the protocol stack and the DU 165 may support one or more different layers of the protocol stack.
  • the CU 160 may host upper protocol layer (e.g., layer 3 (L3) , layer 2 (L2) ) functionality and signaling (e.g., Radio Resource Control (RRC) , service data adaption protocol (SDAP) , Packet Data Convergence Protocol (PDCP) ) .
  • the CU 160 may be connected to one or more DUs 165 or RUs 170, and the one or more DUs 165 or RUs 170 may host lower protocol layers, such as layer 1 (L1) (e.g., physical (PHY) layer) or L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU 160.
  • L1 e.g., physical (PHY) layer
  • L2 e.g., radio link control (RLC) layer, medium access control (MAC) layer
  • a functional split of the protocol stack may be employed between a DU 165 and an RU 170 such that the DU 165 may support one or more layers of the protocol stack and the RU 170 may support one or more different layers of the protocol stack.
  • the DU 165 may support one or multiple different cells (e.g., via one or more RUs 170) .
  • a functional split between a CU 160 and a DU 165, or between a DU 165 and an RU 170 may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU 160, a DU 165, or an RU 170, while other functions of the protocol layer are performed by a different one of the CU 160, the DU 165, or the RU 170) .
  • a CU 160 may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions.
  • CU-CP CU control plane
  • CU-UP CU user plane
  • a CU 160 may be connected to one or more DUs 165 via a midhaul communication link 162 (e.g., F1, F1-c, F1-u) , and a DU 165 may be connected to one or more RUs 170 via a fronthaul communication link 168 (e.g., open fronthaul (FH) interface) .
  • a midhaul communication link 162 or a fronthaul communication link 168 may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities 105 that are in communication via such communication links.
  • infrastructure and spectral resources for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, providing an IAB network architecture (e.g., to a core network 130) .
  • IAB network one or more network entities 105 (e.g., IAB nodes 104) may be partially controlled by each other.
  • One or more IAB nodes 104 may be referred to as a donor entity or an IAB donor.
  • One or more DUs 165 or one or more RUs 170 may be partially controlled by one or more CUs 160 associated with a donor network entity 105 (e.g., a donor base station 140) .
  • the one or more donor network entities 105 may be in communication with one or more additional network entities 105 (e.g., IAB nodes 104) via supported access and backhaul links (e.g., backhaul communication links 120) .
  • IAB nodes 104 may include an IAB mobile termination (IAB-MT) controlled (e.g., scheduled) by DUs 165 of a coupled IAB donor.
  • IAB-MT IAB mobile termination
  • An IAB-MT may include an independent set of antennas for relay of communications with UEs 115, or may share the same antennas (e.g., of an RU 170) of an IAB node 104 used for access via the DU 165 of the IAB node 104 (e.g., referred to as virtual IAB-MT (vIAB-MT) ) .
  • the IAB nodes 104 may include DUs 165 that support communication links with additional entities (e.g., IAB nodes 104, UEs 115) within the relay chain or configuration of the access network (e.g., downstream) .
  • one or more components of the disaggregated RAN architecture e.g., one or more IAB nodes 104 or components of IAB nodes 104) may be configured to operate according to the techniques described herein.
  • an access network (AN) or RAN may include communications between access nodes (e.g., an IAB donor) , IAB nodes 104, and one or more UEs 115.
  • the IAB donor may facilitate connection between the core network 130 and the AN (e.g., via a wired or wireless connection to the core network 130) . That is, an IAB donor may refer to a RAN node with a wired or wireless connection to core network 130.
  • the IAB donor may include a CU 160 and at least one DU 165 (e.g., and RU 170) , in which case the CU 160 may communicate with the core network 130 via an interface (e.g., a backhaul link) .
  • IAB donor and IAB nodes 104 may communicate via an F1 interface according to a protocol that defines signaling messages (e.g., an F1 AP protocol) .
  • the CU 160 may communicate with the core network via an interface, which may be an example of a portion of backhaul link, and may communicate with other CUs 160 (e.g., a CU 160 associated with an alternative IAB donor) via an Xn-C interface, which may be an example of a portion of a backhaul link.
  • An IAB node 104 may refer to a RAN node that provides IAB functionality (e.g., access for UEs 115, wireless self-backhauling capabilities) .
  • a DU 165 may act as a distributed scheduling node towards child nodes associated with the IAB node 104, and the IAB-MT may act as a scheduled node towards parent nodes associated with the IAB node 104. That is, an IAB donor may be referred to as a parent node in communication with one or more child nodes (e.g., an IAB donor may relay transmissions for UEs through one or more other IAB nodes 104) .
  • an IAB node 104 may also be referred to as a parent node or a child node to other IAB nodes 104, depending on the relay chain or configuration of the AN. Therefore, the IAB-MT entity of IAB nodes 104 may provide a Uu interface for a child IAB node 104 to receive signaling from a parent IAB node 104, and the DU interface (e.g., DUs 165) may provide a Uu interface for a parent IAB node 104 to signal to a child IAB node 104 or UE 115.
  • the DU interface e.g., DUs 165
  • IAB node 104 may be referred to as a parent node that supports communications for a child IAB node, or referred to as a child IAB node associated with an IAB donor, or both.
  • the IAB donor may include a CU 160 with a wired or wireless connection (e.g., a backhaul communication link 120) to the core network 130 and may act as parent node to IAB nodes 104.
  • the DU 165 of IAB donor may relay transmissions to UEs 115 through IAB nodes 104, or may directly signal transmissions to a UE 115, or both.
  • the CU 160 of IAB donor may signal communication link establishment via an F1 interface to IAB nodes 104, and the IAB nodes 104 may schedule transmissions (e.g., transmissions to the UEs 115 relayed from the IAB donor) through the DUs 165. That is, data may be relayed to and from IAB nodes 104 via signaling via an NR Uu interface to MT of the IAB node 104. Communications with IAB node 104 may be scheduled by a DU 165 of IAB donor and communications with IAB node 104 may be scheduled by DU 165 of IAB node 104.
  • one or more components of the disaggregated RAN architecture may be configured to support signaling for lower layer triggered mobility handovers as described herein.
  • some operations described as being performed by a UE 115 or a network entity 105 may additionally, or alternatively, be performed by one or more components of the disaggregated RAN architecture (e.g., IAB nodes 104, DUs 165, CUs 160, RUs 170, RIC 175, SMO 180) .
  • a UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples.
  • a UE 115 may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA) , a tablet computer, a laptop computer, or a personal computer.
  • PDA personal digital assistant
  • a UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, or vehicles, meters, among other examples.
  • WLL wireless local loop
  • IoT Internet of Things
  • IoE Internet of Everything
  • MTC machine type communications
  • the UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115 that may sometimes act as relays as well as the network entities 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.
  • devices such as other UEs 115 that may sometimes act as relays as well as the network entities 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.
  • the UEs 115 and the network entities 105 may wirelessly communicate with one another via one or more communication links 125 (e.g., an access link) using resources associated with one or more carriers.
  • the term “carrier” may refer to a set of RF spectrum resources having a defined physical layer structure for supporting the communication links 125.
  • a carrier used for a communication link 125 may include a portion of a RF spectrum band (e.g., a bandwidth part (BWP) ) that is operated according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR) .
  • BWP bandwidth part
  • Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information) , control signaling that coordinates operation for the carrier, user data, or other signaling.
  • the wireless communications system 100 may support communication with a UE 115 using carrier aggregation or multi-carrier operation.
  • a UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration.
  • Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers.
  • Communication between a network entity 105 and other devices may refer to communication between the devices and any portion (e.g., entity, sub-entity) of a network entity 105.
  • the terms “transmitting, ” “receiving, ” or “communicating, ” when referring to a network entity 105 may refer to any portion of a network entity 105 (e.g., a base station 140, a CU 160, a DU 165, a RU 170) of a RAN communicating with another device (e.g., directly or via one or more other network entities 105) .
  • a network entity 105 e.g., a base station 140, a CU 160, a DU 165, a RU 170
  • a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers.
  • a carrier may be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute RF channel number (EARFCN) ) and may be identified according to a channel raster for discovery by the UEs 115.
  • E-UTRA evolved universal mobile telecommunication system terrestrial radio access
  • a carrier may be operated in a standalone mode, in which case initial acquisition and connection may be conducted by the UEs 115 via the carrier, or the carrier may be operated in a non-standalone mode, in which case a connection is anchored using a different carrier (e.g., of the same or a different radio access technology) .
  • the communication links 125 shown in the wireless communications system 100 may include downlink transmissions (e.g., forward link transmissions) from a network entity 105 to a UE 115, uplink transmissions (e.g., return link transmissions) from a UE 115 to a network entity 105, or both, among other configurations of transmissions.
  • Carriers may carry downlink or uplink communications (e.g., in an FDD mode) or may be configured to carry downlink and uplink communications (e.g., in a TDD mode) .
  • a carrier may be associated with a particular bandwidth of the RF spectrum and, in some examples, the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system 100.
  • the carrier bandwidth may be one of a set of bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz) ) .
  • Devices of the wireless communications system 100 e.g., the network entities 105, the UEs 115, or both
  • the wireless communications system 100 may include network entities 105 or UEs 115 that support concurrent communications using carriers associated with multiple carrier bandwidths.
  • each served UE 115 may be configured for operating using portions (e.g., a sub-band, a BWP) or all of a carrier bandwidth.
  • Signal waveforms transmitted via a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM) ) .
  • MCM multi-carrier modulation
  • OFDM orthogonal frequency division multiplexing
  • DFT-S-OFDM discrete Fourier transform spread OFDM
  • a resource element may refer to resources of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, in which case the symbol period and subcarrier spacing may be inversely related.
  • the quantity of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both) , such that a relatively higher quantity of resource elements (e.g., in a transmission duration) and a relatively higher order of a modulation scheme may correspond to a relatively higher rate of communication.
  • a wireless communications resource may refer to a combination of an RF spectrum resource, a time resource, and a spatial resource (e.g., a spatial layer, a beam) , and the use of multiple spatial resources may increase the data rate or data integrity for communications with a UE 115.
  • One or more numerologies for a carrier may be supported, and a numerology may include a subcarrier spacing ( ⁇ f) and a cyclic prefix.
  • a carrier may be divided into one or more BWPs having the same or different numerologies.
  • a UE 115 may be configured with multiple BWPs.
  • a single BWP for a carrier may be active at a given time and communications for the UE 115 may be restricted to one or more active BWPs.
  • Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms) ) .
  • Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023) .
  • SFN system frame number
  • Each frame may include multiple consecutively-numbered subframes or slots, and each subframe or slot may have the same duration.
  • a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a quantity of slots.
  • each frame may include a variable quantity of slots, and the quantity of slots may depend on subcarrier spacing.
  • Each slot may include a quantity of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period) .
  • a slot may further be divided into multiple mini-slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., N F ) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation.
  • a subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system 100 and may be referred to as a transmission time interval (TTI) .
  • TTI duration e.g., a quantity of symbol periods in a TTI
  • the smallest scheduling unit of the wireless communications system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) ) .
  • Physical channels may be multiplexed for communication using a carrier according to various techniques.
  • a physical control channel and a physical data channel may be multiplexed for signaling via a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques.
  • a control region e.g., a control resource set (CORESET)
  • CORESET control resource set
  • One or more control regions may be configured for a set of the UEs 115.
  • one or more of the UEs 115 may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner.
  • An aggregation level for a control channel candidate may refer to an amount of control channel resources (e.g., control channel elements (CCEs) ) associated with encoded information for a control information format having a given payload size.
  • Search space sets may include common search space sets configured for sending control information to multiple UEs 115 and UE-specific search space sets for sending control information to a specific UE 115.
  • a network entity 105 may provide communication coverage via one or more cells, for example a macro cell, a small cell, a hot spot, or other types of cells, or any combination thereof.
  • the term “cell” may refer to a logical communication entity used for communication with a network entity 105 (e.g., using a carrier) and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID) , a virtual cell identifier (VCID) , or others) .
  • a cell also may refer to a coverage area 110 or a portion of a coverage area 110 (e.g., a sector) over which the logical communication entity operates.
  • Such cells may range from smaller areas (e.g., a structure, a subset of structure) to larger areas depending on various factors such as the capabilities of the network entity 105.
  • a cell may be or include a building, a subset of a building, or exterior spaces between or overlapping with coverage areas 110, among other examples.
  • a macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by the UEs 115 with service subscriptions with the network provider supporting the macro cell.
  • a small cell may be associated with a lower-powered network entity 105 (e.g., a lower-powered base station 140) , as compared with a macro cell, and a small cell may operate using the same or different (e.g., licensed, unlicensed) frequency bands as macro cells.
  • Small cells may provide unrestricted access to the UEs 115 with service subscriptions with the network provider or may provide restricted access to the UEs 115 having an association with the small cell (e.g., the UEs 115 in a closed subscriber group (CSG) , the UEs 115 associated with users in a home or office) .
  • a network entity 105 may support one or multiple cells and may also support communications via the one or more cells using one or multiple component carriers.
  • a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT) , enhanced mobile broadband (eMBB) ) that may provide access for different types of devices.
  • protocol types e.g., MTC, narrowband IoT (NB-IoT) , enhanced mobile broadband (eMBB)
  • NB-IoT narrowband IoT
  • eMBB enhanced mobile broadband
  • a network entity 105 may be movable and therefore provide communication coverage for a moving coverage area 110.
  • different coverage areas 110 associated with different technologies may overlap, but the different coverage areas 110 may be supported by the same network entity 105.
  • the overlapping coverage areas 110 associated with different technologies may be supported by different network entities 105.
  • the wireless communications system 100 may include, for example, a heterogeneous network in which different types of the network entities 105 provide coverage for various coverage areas 110 using the same or different radio access technologies.
  • the wireless communications system 100 may support synchronous or asynchronous operation.
  • network entities 105 e.g., base stations 140
  • network entities 105 may have different frame timings, and transmissions from different network entities 105 may, in some examples, not be aligned in time.
  • the techniques described herein may be used for either synchronous or asynchronous operations.
  • Some UEs 115 may be low cost or low complexity devices and may provide for automated communication between machines (e.g., via Machine-to-Machine (M2M) communication) .
  • M2M communication or MTC may refer to data communication technologies that allow devices to communicate with one another or a network entity 105 (e.g., a base station 140) without human intervention.
  • M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application program that uses the information or presents the information to humans interacting with the application program.
  • Some UEs 115 may be designed to collect information or enable automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.
  • Some UEs 115 may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode that supports one-way communication via transmission or reception, but not transmission and reception concurrently) .
  • half-duplex communications may be performed at a reduced peak rate.
  • Other power conservation techniques for the UEs 115 include entering a power saving deep sleep mode when not engaging in active communications, operating using a limited bandwidth (e.g., according to narrowband communications) , or a combination of these techniques.
  • some UEs 115 may be configured for operation using a narrowband protocol type that is associated with a defined portion or range (e.g., set of subcarriers or resource blocks (RBs) ) within a carrier, within a guard-band of a carrier, or outside of a carrier.
  • a narrowband protocol type that is associated with a defined portion or range (e.g., set of subcarriers or resource blocks (RBs) ) within a carrier, within a guard-band of a carrier, or outside of a carrier.
  • the wireless communications system 100 may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof.
  • the wireless communications system 100 may be configured to support ultra-reliable low-latency communications (URLLC) .
  • the UEs 115 may be designed to support ultra-reliable, low-latency, or critical functions.
  • Ultra-reliable communications may include private communication or group communication and may be supported by one or more services such as push-to-talk, video, or data.
  • Support for ultra-reliable, low-latency functions may include prioritization of services, and such services may be used for public safety or general commercial applications.
  • the terms ultra-reliable, low-latency, and ultra-reliable low-latency may be used interchangeably herein.
  • a UE 115 may be configured to support communicating directly with other UEs 115 via a device-to-device (D2D) communication link 135 (e.g., in accordance with a peer-to-peer (P2P) , D2D, or sidelink protocol) .
  • D2D device-to-device
  • P2P peer-to-peer
  • one or more UEs 115 of a group that are performing D2D communications may be within the coverage area 110 of a network entity 105 (e.g., a base station 140, an RU 170) , which may support aspects of such D2D communications being configured by (e.g., scheduled by) the network entity 105.
  • one or more UEs 115 of such a group may be outside the coverage area 110 of a network entity 105 or may be otherwise unable to or not configured to receive transmissions from a network entity 105.
  • groups of the UEs 115 communicating via D2D communications may support a one-to-many (1: M) system in which each UE 115 transmits to each of the other UEs 115 in the group.
  • a network entity 105 may facilitate the scheduling of resources for D2D communications.
  • D2D communications may be carried out between the UEs 115 without an involvement of a network entity 105.
  • a D2D communication link 135 may be an example of a communication channel, such as a sidelink communication channel, between vehicles (e.g., UEs 115) .
  • vehicles may communicate using vehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these.
  • V2X vehicle-to-everything
  • V2V vehicle-to-vehicle
  • a vehicle may signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information relevant to a V2X system.
  • vehicles in a V2X system may communicate with roadside infrastructure, such as roadside units, or with the network via one or more network nodes (e.g., network entities 105, base stations 140, RUs 170) using vehicle-to-network (V2N) communications, or with both.
  • roadside infrastructure such as roadside units
  • network nodes e.g., network entities 105, base stations 140, RUs 170
  • V2N vehicle-to-network
  • the core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions.
  • the core network 130 may be an evolved packet core (EPC) or 5G core (5GC) , which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management function (AMF) ) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) .
  • EPC evolved packet core
  • 5GC 5G core
  • MME mobility management entity
  • AMF access and mobility management function
  • S-GW serving gateway
  • PDN Packet Data Network gateway
  • UPF user plane function
  • the control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs 115 served by the network entities 105 (e.g., base stations 140) associated with the core network 130.
  • NAS non-access stratum
  • User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions.
  • the user plane entity may be connected to IP services 150 for one or more network operators.
  • the IP services 150 may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched Streaming Service.
  • IMS IP Multimedia Subsystem
  • the wireless communications system 100 may operate using one or more frequency bands, which may be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz) .
  • the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length.
  • UHF waves may be blocked or redirected by buildings and environmental features, which may be referred to as clusters, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs 115 located indoors. Communications using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to communications using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.
  • HF high frequency
  • VHF very high frequency
  • the wireless communications system 100 may also operate using a super high frequency (SHF) region, which may be in the range of 3 GHz to 30 GHz, also known as the centimeter band, or using an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) , also known as the millimeter band.
  • SHF super high frequency
  • EHF extremely high frequency
  • the wireless communications system 100 may support millimeter wave (mmW) communications between the UEs 115 and the network entities 105 (e.g., base stations 140, RUs 170) , and EHF antennas of the respective devices may be smaller and more closely spaced than UHF antennas.
  • mmW millimeter wave
  • such techniques may facilitate using antenna arrays within a device.
  • EHF transmissions may be subject to even greater attenuation and shorter range than SHF or UHF transmissions.
  • the techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body.
  • the wireless communications system 100 may utilize both licensed and unlicensed RF spectrum bands.
  • the wireless communications system 100 may employ License Assisted Access (LAA) , LTE-Unlicensed (LTE-U) radio access technology, or NR technology using an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band.
  • LAA License Assisted Access
  • LTE-U LTE-Unlicensed
  • NR NR technology
  • an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band.
  • devices such as the network entities 105 and the UEs 115 may employ carrier sensing for collision detection and avoidance.
  • operations using unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating using a licensed band (e.g., LAA) .
  • Operations using unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.
  • a network entity 105 e.g., a base station 140, an RU 170
  • a UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming.
  • the antennas of a network entity 105 or a UE 115 may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming.
  • one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower.
  • antennas or antenna arrays associated with a network entity 105 may be located at diverse geographic locations.
  • a network entity 105 may include an antenna array with a set of rows and columns of antenna ports that the network entity 105 may use to support beamforming of communications with a UE 115.
  • a UE 115 may include one or more antenna arrays that may support various MIMO or beamforming operations.
  • an antenna panel may support RF beamforming for a signal transmitted via an antenna port.
  • the network entities 105 or the UEs 115 may use MIMO communications to exploit multipath signal propagation and increase spectral efficiency by transmitting or receiving multiple signals via different spatial layers.
  • Such techniques may be referred to as spatial multiplexing.
  • the multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas.
  • Each of the multiple signals may be referred to as a separate spatial stream and may carry information associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords) .
  • Different spatial layers may be associated with different antenna ports used for channel measurement and reporting.
  • MIMO techniques include single-user MIMO (SU-MIMO) , for which multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO) , for which multiple spatial layers are transmitted to multiple devices.
  • SU-MIMO single-user MIMO
  • Beamforming which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a network entity 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device.
  • Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating along particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference.
  • the adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device.
  • the adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation) .
  • a network entity 105 or a UE 115 may use beam sweeping techniques as part of beamforming operations.
  • a network entity 105 e.g., a base station 140, an RU 170
  • Some signals e.g., synchronization signals, reference signals, beam selection signals, or other control signals
  • the network entity 105 may transmit a signal according to different beamforming weight sets associated with different directions of transmission.
  • Transmissions along different beam directions may be used to identify (e.g., by a transmitting device, such as a network entity 105, or by a receiving device, such as a UE 115) a beam direction for later transmission or reception by the network entity 105.
  • a transmitting device such as a network entity 105
  • a receiving device such as a UE 115
  • Some signals may be transmitted by transmitting device (e.g., a transmitting network entity 105, a transmitting UE 115) along a single beam direction (e.g., a direction associated with the receiving device, such as a receiving network entity 105 or a receiving UE 115) .
  • a single beam direction e.g., a direction associated with the receiving device, such as a receiving network entity 105 or a receiving UE 115
  • the beam direction associated with transmissions along a single beam direction may be determined based on a signal that was transmitted along one or more beam directions.
  • a UE 115 may receive one or more of the signals transmitted by the network entity 105 along different directions and may report to the network entity 105 an indication of the signal that the UE 115 received with a highest signal quality or an otherwise acceptable signal quality.
  • transmissions by a device may be performed using multiple beam directions, and the device may use a combination of digital precoding or beamforming to generate a combined beam for transmission (e.g., from a network entity 105 to a UE 115) .
  • the UE 115 may report feedback that indicates precoding weights for one or more beam directions, and the feedback may correspond to a configured set of beams across a system bandwidth or one or more sub-bands.
  • the network entity 105 may transmit a reference signal (e.g., a cell-specific reference signal (CRS) , a channel state information reference signal (CSI-RS) ) , which may be precoded or unprecoded.
  • a reference signal e.g., a cell-specific reference signal (CRS) , a channel state information reference signal (CSI-RS)
  • the UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook) .
  • PMI precoding matrix indicator
  • codebook-based feedback e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook
  • these techniques are described with reference to signals transmitted along one or more directions by a network entity 105 (e.g., a base station 140, an RU 170)
  • a UE 115 may employ similar techniques for transmitting signals multiple times along different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE 115) or for transmitting a signal along a single direction (e.g., for transmitting data to a receiving device) .
  • a receiving device may perform reception operations in accordance with multiple receive configurations (e.g., directional listening) when receiving various signals from a transmitting device (e.g., a network entity 105) , such as synchronization signals, reference signals, beam selection signals, or other control signals.
  • a transmitting device e.g., a network entity 105
  • a receiving device may perform reception in accordance with multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as “listening” according to different receive configurations or receive directions.
  • a receiving device may use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal) .
  • the single receive configuration may be aligned along a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio (SNR) , or otherwise acceptable signal quality based on listening according to multiple beam directions) .
  • receive configuration directions e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio (SNR) , or otherwise acceptable signal quality based on listening according to multiple beam directions
  • the wireless communications system 100 may be a packet-based network that operates according to a layered protocol stack.
  • communications at the bearer or PDCP layer may be IP-based.
  • An RLC layer may perform packet segmentation and reassembly to communicate via logical channels.
  • a MAC layer may perform priority handling and multiplexing of logical channels into transport channels.
  • the MAC layer also may implement error detection techniques, error correction techniques, or both to support retransmissions to improve link efficiency.
  • an RRC layer may provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a network entity 105 or a core network 130 supporting radio bearers for user plane data.
  • a PHY layer may map transport channels to physical channels.
  • the UEs 115 and the network entities 105 may support retransmissions of data to increase the likelihood that data is received successfully.
  • Hybrid automatic repeat request (HARQ) feedback is one technique for increasing the likelihood that data is received correctly via a communication link (e.g., a communication link 125, a D2D communication link 135) .
  • HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC) ) , forward error correction (FEC) , and retransmission (e.g., automatic repeat request (ARQ) ) .
  • FEC forward error correction
  • ARQ automatic repeat request
  • HARQ may improve throughput at the MAC layer in poor radio conditions (e.g., low signal-to-noise conditions) .
  • a device may support same-slot HARQ feedback, in which case the device may provide HARQ feedback in a specific slot for data received via a previous symbol in the slot. In some other examples, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.
  • UEs 115 may use L3 signaling to perform handover procedures from a source serving cell to a candidate cell.
  • the UE 115 may receive a cell switch command to switch to a candidate cell and then after receiving the cell switch command the UE 115 may being to initiate the handover procedure from the source serving cell to the candidate cell.
  • the handover procedure may include the UE 115 acquiring a timing advance from the candidate cell, activating a TCI state associated with the candidate cell, performing measurements on reference signals from the candidate cell, among others.
  • performing such techniques in such an order may increase the latency associated with the handover procedure which may in turn reduce the reliability of the wireless communications system.
  • the techniques of the present disclosure describe enhancements to UE 115 capabilities where the UE 115 may be capable of performing timing advance acquisitions, TCI state activations, and reference signal measurements for the candidate cells before receiving a cell switch command.
  • the UE 115 may be capable of acquiring timing advance values from a set of candidate cells before selecting a candidate cell and receiving a cell switch command.
  • the UE 115 may use the timing advance values of the candidate cells as a factor for selecting a candidate cell to connect with.
  • the UE 115 may be capable of activating a TCI state of a candidate cell before receiving the cell switch command which may aid in reducing the latency associated with the handover procedure.
  • the UE 115 may be capable of performing signal quality measurements on reference signals received from the candidate cells to aid in more accurately selecting a candidate cell to connect with.
  • the techniques of the present disclosure describe techniques for enhancing UE 115 capabilities to perform procedures related to handovers before receiving a cell switch command to aid in more accurately selecting candidate cells to have the UE 115 connect with, reduce latency of the handover procedure, and increase the reliability of the wireless communications system.
  • a TCI state may be indicated via beamforming parameters.
  • the beamforming parameters may indicate a direction of beamforming for a cell (e.g., a candidate cell) .
  • a TCI state may indicate a quasi co-location (QCL) relationship between a control state information (CSI) reference signal and a set of demodulation reference signal ports.
  • QCL quasi co-location
  • CSI control state information
  • a UE 115 may be capable of focusing beamforming of signals to enhance communications with a candidate cell.
  • the UE may receive beamforming parameters or a set of beamforming parameters to indicate a TCI state for the UE to activate based on the handover procedure.
  • the indicated TCI state may be a unified TCI state.
  • the TCI state may be a joint TCI state that indicates a common beam for at least one downlink channel/downlink reference signal and for at least one uplink channel/uplink reference signal.
  • the TCI state may further indicate UE 115 specific channels (e.g., a physical downlink control channel (PDCCH) , a physical downlink shared channel (PDSCH) , a physical uplink control channel (PUCCH) , and a physical uplink shared channel (PUSCH) ) along with channels or resources for transmitting a CSI reference signal or a sounding reference signal (SRS) .
  • PDCCH physical downlink control channel
  • PDSCH physical downlink shared channel
  • PUCCH physical uplink control channel
  • PUSCH physical uplink shared channel
  • a second type of TCI state there may be two separate TCI states for uplink and downlink communications.
  • the UE 115 may update at least a special cell (SpCell) via L1/L2 signaling based on L1 measurements and the L1 measurements may be intra-frequency (e.g., within the same frequency) measurements or inter-frequency (e.g., within one or more different frequencies) measurements.
  • the L1 measurements may be intra-frequency (e.g., within the same frequency) measurements or inter-frequency (e.g., within one or more different frequencies) measurements.
  • a configuration and maintenance for multiple candidate cells may allow for relatively fast application of configurations for candidate cells.
  • the mechanisms may include a dynamic switching mechanism among candidate serving cells (e.g., including SpCells and secondary cells (SCells) ) for potential applicable scenarios based on L1/L2 signaling.
  • L1 enhancements may be used for inter-cell beam management which may include L1 measurements, L1 measurement reporting, and beam indications. Such procedures may also include timing advance managements and CU-DU interface signaling to support the L1/L2 mobility.
  • L1/L2 based inter-cell mobility procedures may be applicable to multiple scenarios.
  • the procedures may be used for carrier aggregation (CA) and NR-dual connectivity (DC) cases with serving cell changes within one configured grant.
  • CA carrier aggregation
  • DC NR-dual connectivity
  • the procedures may be used for intra-DU cases and intra-CU and inter-DU cases. In such cases, the wireless communications system 100 may refrain from adding any RAN interfaces.
  • the procedures may be used for both intra-frequency and inter-frequency cells or for a first frequency range (FR1) or a second frequency range (FR2) . Further, the procedures may be used when for synchronized or non-synchronized source serving cells and target candidate cells.
  • FR1 first frequency range
  • FR2 second frequency range
  • the procedures may be used when for synchronized or non-synchronized source serving cells and target candidate cells.
  • a network entity 105 may enable the UE capabilities described herein per UE 115, per band, per band combination, per feature set, per feature set per component carrier, or any combination thereof.
  • the UE 115 capabilities may also be enabled for frequency division duplexing (FDD) or for time division duplexing (TDD) , enabled for FR1 or FR2, or a mixture of FDD/TDD, FR1/FR2, or any combination thereof.
  • FDD frequency division duplexing
  • TDD time division duplexing
  • FIG. 2 shows an example of a wireless communications system 200 that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • the wireless communications system 200 may implement or be implemented by the wireless communications system 100.
  • the wireless communications system 200 may include a UE 115-a, a network entity 105-a within a cell 205-a, a network entity 105-b within a cell 205-b, a network entity 105-c within a cell 205-c, and a network entity 105-d within a cell 205-d, which may be examples of devices described herein with reference to FIG. 1.
  • the UE 115-a may communicate with the network entity 105-a, the network entity 105-b, the network entity 105-c, and the network entity 105-d via a communication link 210-a, a communication link 210-b, a communication link 210-c, and a communication link 210-d respectively.
  • the communication links 210 may include an uplink communication link and a downlink communication link.
  • the communication links 210 may be examples of Uu links, sidelink links, backhaul links, D2D links, or some other type of communication links 125 described herein with reference to FIG. 1.
  • the UE 115-a may be in communication with the network entity 105-a within the cell 205-a.
  • the cell 205-a may be a serving cell for the UE 115-a and the UE 115-a may communicate directly with the network entity 105-a via the communication link 210-a.
  • the UE 115-a may begin to move out of the coverage area of the network entity 105-a and the network entity 105-a may initiate a handover procedure to have the UE 115-a connect with a network entity 105 (e.g., the network entity 105-b, the network entity 105-c, or the network entity 105-d) of a candidate cell.
  • a network entity 105 e.g., the network entity 105-b, the network entity 105-c, or the network entity 105-d
  • the candidate cells may include the cell 205-b, the cell 205-c, or the cell 205-d.
  • the network entity 105-a may transmit a cell switch command 215 to the UE 115-a indicating for the UE 115-a to handover from the cell 205-a to a different cell 205.
  • the cell switch command 215 may indicate that the UE 115-a should connect with the cell 205-b (e.g., the cell 205 illustrated with short dash lines may be the selected cell 205) .
  • the UE 115-a may acquire a timing advance value for communications with the network entity 105-b within the cell 205-b (e.g., the cell 205 indicated and selected by the cell switch command 215) .
  • having the UE 115 acquire the timing advance value as part of the handover procedure may increase the latency associated with the handover procedures.
  • An increase in the latency associated with the handover procedures may cause a decrease in reliability in the wireless communications system by having the UE 115-a stay connected to the cell 205-a for a longer period of time after receiving the cell switch command 215.
  • the UE 115-a may be enabled to acquire the timing advance values from the candidate cells (e.g., the cell 205-b, the cell 205-c, and the cell 205-d) before receiving the cell switch command 215.
  • the UE 115-a may transmit a capability message to the network entity 105-a within the cell 205-a (e.g., the current serving cell) indicating that the UE 115-a is capable of timing advance acquisition from the candidate cells prior to receiving the cell switch command 215.
  • the network entity 105-a may transmit control signaling 220 to the UE 115-a via the communication link 210-a enabling the UE 115-a to acquire the timing advance values from the candidate cells prior to the network entity 105-a transmitting the cell switch command 215.
  • the UE 115-a may support timing advance value acquisitions before the cell switch command 215 based on receiving the control signaling 220.
  • the network entity 105-a may indicate, via the control signaling 220, for the UE 115-a to acquire the timing advance values (e.g., UE 115 based timing advance acquisition) .
  • the network entity 105-b may indicate, via the control signaling 220, for the UE 115-a to acquire the timing advance values via random access procedures (e.g., random access channel (RACH) based timing advance acquisition) .
  • RACH random access channel
  • the network entity 105-a via the control signaling 220, for the UE 115-a to acquire the timing advance value using a simultaneous configuration of both the UE 115 based timing advance acquisition and the RACH based timing advance acquisition. That is, the UE 115-a may determine the timing advance values via UE 115 procedures and random access procedures (e.g., RACH procedures) . Moreover, in some other cases, the network entity 105-a may indicate, via the control signaling 220, for the UE 115-a to acquire an updated timing advance value for a candidate cell or multiple candidate cells using the same mechanism as the initial timing advance value acquisition.
  • control signaling 220 may be a downlink control information (DCI) message, which may also be referred to as a PDCCH order.
  • DCI downlink control information
  • the initial timing advance acquisitions may be conducted by PDCCH order (e.g., via a DCI) triggered random access procedures (e.g., RACH procedures) in a candidate cell.
  • the UE 115-a may be enabled to use UE 115 based timing advance acquisition and the UE 115-a may perform measurements to acquire the timing advance values from the candidate cells (e.g., the cell 205-b, the cell 205-c, and the cell 205-d) . Specifically, the UE 115-a may acquire the timing advance value of the respective candidate cell by using the timing advance value of the serving cell (the cell 205-a) and a reception timing difference between the serving cell and the respective candidate cell.
  • the candidate cells e.g., the cell 205-b, the cell 205-c, and the cell 205-d
  • the UE 115-a may acquire the timing advance value of the respective candidate cell by using the timing advance value of the serving cell (the cell 205-a) and a reception timing difference between the serving cell and the respective candidate cell.
  • the UE 115-a may measure the difference in the time domain between receiving a reference signal from the network entity 105-a of the serving cell and receiving a reference signal from the network entity 105-b of the respective candidate cell (e.g., the cell 205-b) . Further, the network entity 105-a may indicate to the UE 115-a of such a configuration via the control signaling 220. Additionally, or alternatively, the control signaling 220 may also enable the UE 115-a to transmit an indication of the timing advance values for the candidate cells to the network entity 105-a of the serving cell 205-a.
  • the UE 115-a may acquire the timing advance value of the candidate cells via random access procedures (e.g., RACH procedures) indicated by a DCI (e.g., PDCCH ordered RACH procedures) .
  • RACH procedures random access procedures
  • DCI e.g., PDCCH ordered RACH procedures
  • the UE 115-a may support and be enabled via the control signaling 220 of the PDCCH ordered RACH procedures to be triggered by the serving cell, a serving component carrier, or both.
  • the UE 115-a may also support and be enabled to receive an indication via the control signaling 220 of a candidate cell from a set of candidate cells (e.g., the cell 205-b, the cell 205-c, and the cell 205-d) and random access occasions (e.g., RACH occasions) available for the PDCCH ordered RACH procedures.
  • the control signaling 220 may also include a configuration of random access resources (e.g., RACH resources) which the UE 115-a may receive prior to the PDCCH ordered (e.g., DCI ordered) RACH procedures. That is, the UE 115-a may support receiving the configuration of RACH resources for the set of candidate cells prior to receiving a DCI message that initiates the RACH procedures.
  • the RACH resources may indicate random access preamble 225 indices and indicate RACH occasions associated with synchronization signal block (SSB) indices configured for each candidate cell (e.g., the cell 205-b, the cell 205-c, and the cell 205-d) .
  • SSB synchronization signal block
  • the UE 115-a may transmit a random access preamble or PRACH (e.g., a random access preamble 225-a, a random access preamble 225-b, or a random access preamble 225-c) within one of the RACH occasions allocated for the RACH procedure.
  • the UE 115-a may transmit the random access preambles 225 to each of the candidate cells (e.g., the cell 205-b, the cell 205-c, and the cell 205-d) .
  • the DCI message from the network entity 105-a within the source serving cell e.g., the cell 205-a
  • a first DCI format (e.g., DCI 1_0) may include one or more reserved bits for indication of a cell identifier (ID) for the cell 205-b.
  • ID cell identifier
  • the UE 115-a may transmit the random access preamble 225-a to the network entity 105-b within the cell 205-b.
  • the SSB transmitted via the candidate cell indicated (e.g., the cell 205-b) via the DCI may also serve as a path loss reference signal for random access preamble 225 transmission (e.g., PRACH transmission) power determination.
  • the DCI may include the timing for the indicated candidate cell while the UE 115-a may not be configured with a PUCCH or PUSCH with the indicated cell.
  • the UE 115-a may determine based on the timing of the indicated candidate cell to use a longer time gap between receiving the DCI and transmitting the random access preamble 225-a. Further, the UE 115-a may also determine whether there may be an impact or an interruption to uplink transmissions on serving component carriers due to transmitting the random access preamble 225-a.
  • the UE 115-a may receive a random access response 230 (e.g., a random access response 230-a, a random access response 230-b, a random access response 230-c) from a network entity 105 (e.g., the network entity 105-b, the network entity 105-c, or the network entity 105-d) of the candidate cell.
  • a network entity 105 e.g., the network entity 105-b, the network entity 105-c, or the network entity 105-d
  • the UE 115-a may support RACH procedures with a combination of both receiving random access responses 230 and not receiving random access responses 230.
  • the network entity 105-a may indicate a default scheme via the control signaling 220.
  • the control signaling 220 may indicate that the candidate cells may refrain from transmitting random access responses 230.
  • the network entity 105-a may indicate the timing advance value for the selected candidate cell (e.g., the cell 205-b) via the cell switch command 215.
  • the control signaling 220 may also indicate whether the UE 115-a should retransmit the random access preambles 225 when the candidate cells refrain from transmitting the random access responses 230.
  • the control signaling 220 may also indicate how UE 115-a may determine the transmit power of subsequent random access preambles 225 triggered by PDCCH order (e.g., triggered by a DCI) .
  • the UE 115-a may indicate whether a random access preamble 225 is an initial transmission or retransmission directly within the random access preamble 225 (e.g., indicated within the header of the random access preamble 225 or via a set of reserved bits) .
  • the control signaling 220 may also indicate that a power ramping value may be configured and determined by the DCI that is used to trigger the RACH procedures.
  • control signaling 220 may indicate that the candidate cells may transmit the random access responses 230. Further, the control signaling 220 may additionally indicate whether the serving cell (e.g., the cell 205-a) , the candidate cells, or both will transmit the random access responses 230. If the UE 115-a is capable of and enabled by the control signaling 220 to receive a random access response 230 from the serving cell where the random access response 230 may be received in an intra-DU case or in an inter-DU case.
  • the serving cell e.g., the cell 205-a
  • the control signaling 220 may include an indication of whether a first type-PDCCH common search space set of the candidate cell may be configured to the UE 115-a. Additionally, the control signaling 220 may indicate information about the timing of the random access response 230.
  • the random access response 230 timing indication may include postponing the starting point of the random access response 230 window, extending the length of the random access response 230 window, a length and offset of the starting point of random access response 230 window (e.g., the length and offset may be configured via an RRC message) , or any combination thereof.
  • a random access response 230 window may not be needed.
  • a random access response 230 may indicate the timing advance value of the respective candidate cell and other parameters such as UE 115 ID and a candidate cell ID.
  • the UE 115-a may transmit an indicate to the network entity 105-a via the communication link 210-a to indicate a maximum quantity of timing advance values that the UE 115-a may store.
  • the UE 115-a may store, maintain, and handle at least one timing advance value per candidate cell.
  • the storing, maintaining, and handling of the corresponding timing advance values for more than one candidate cell may be based on the capability of the UE 115-a.
  • a quantity of candidate cells the UE 115-a may store timing advance values may be based on the capability of the UE 115-a.
  • the UE 115-a may be able to select which candidate cell to connect with during the handover procedure. For example, based on the timing advance value, the UE 115-amay select the cell 205-b to connect with. As such, the UE 115-a may transmit an indication of such selection to the network entity 105-a for the cell switch command 215. Therefore, when the UE 115-a receives the cell switch command 215, the UE 115-a may connect with the network entity 105-b within the cell 205-b based on selecting the cell 205-b.
  • the network entity 105-a may select which cell the UE 115-a should connect with based on the timing advance values. For example, the UE 115-a may transmit the timing advance values to the network entity 105-a and the network entity 105-a may transmit the cell switch command 215 indicating one of the candidate cells based on the received timing advance values. Performing such procedure may allow the UE 115-a, the network entity 105-a, or both, to make more accurate cell 205 selections for the cell switch command 215. According to the techniques of the present disclosure, the UE 115-a may perform additional procedures to enhance the reliability, accuracy, and efficiency of the wireless communications system 200. Such additional procedures may be described herein including with reference to FIGs. 3–7.
  • FIG. 3 shows an example of a process flow 300 that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • the process flow 300 may implement or be implemented by the wireless communications system 100 and/or the wireless communications system 200.
  • the process flow 300 may include a UE 115-d and a network entity 105-n, which may be examples of devices described herein with reference to FIG. 1.
  • the operations between the UE 115-d and the network entity 105-n may be performed in different orders or at different times. Some operations may also be left out of the process flow 300, or other operations may be added. Although the UE 115-d and the network entity 105-n are shown performing the operations of the process flow 300, some aspects of some operations may also be performed by one or more other wireless devices.
  • the UE 115-d may receive, from the network entity 105-n within a serving cell connected with the UE 115-d, control signaling indication information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the UE 115-d may transmit, to the serving cell, an indication of a maximum quantity of timing advance values for different candidate cells that the UE 115-d may be capable of storing. As such, the UE 115-d may receive the control signaling based on transmitting the indication.
  • the UE 115-d may receive, via the control signaling an indication of whether the UE may acquire a timing advance value of the candidate cell before receiving the cell switch command by UE-measurements of reference signals, by random access procedures, or both, where selecting a candidate cell from the set of candidate cells may be based on receiving the indication.
  • the UE 115-d may receive, via the control signaling an indication that the timing advance values should be based on UE-measurements of a reception time difference between the serving cell and a respective candidate cell and a timing advance value for the serving cell, where selecting the candidate cell may be based receiving the indication.
  • the UE 115-c may receive, via the control signaling, an indication of resources for performing a random access procedure with the set of candidate cells to acquire the timing advance values of the set of candidate cells, where selecting the candidate cell is based at least in part on receiving the indication.
  • the control signaling may be a DCI and may include and identifier of a candidate cell.
  • the UE 115-c may transmit a random access preamble as part of the random access procedure.
  • control signaling received at 305 may include an indication of whether the serving cell, the candidate cells from the set of candidate cells, or both, may transmit a random access response in response to the random access preamble transmitted from the UE 115-d at 310 as part of acquiring the timing advance values using the random access procedure.
  • the UE 115-d may indicate the support a timing advance acquisition mechanism for candidate cells and the network entity 105-n may enable the UE 115-d with the timing advance acquisition mechanism via the control signaling.
  • the network entity 105-n transmit the control signaling enabling the UE 115-d with a RACH-based timing advance acquisition mechanism.
  • the UE 115-d may support and the control signaling may enable PDCCH ordered RACH procedures (e.g., DCI ordered RACH procedures) while the UE 115-d may refrain from transmitting a random access response.
  • control signaling may also indicate an indication of a candidate cell and/or RACH occasions of candidate cell in a DCI, a configuration of RACH resource for candidate cell (s) provided prior to the DCI, an indication of a SSB from a candidate cell indicated in the DCI, where the SSB may be the path loss reference signal for a PRACH transmit power determination, an indication of a timing advance command being indicated in the cell switch command, an indication of a DCI to indicate an initial transmission or retransmission of a PRACH, an indication of a DCI to indicate a configured power ramping-up value for a PRACH transmission, or any combination thereof.
  • the UE 115-d may support and the network entity 105-n may transmit the control signaling enabling the UE 115-d to use a UE-based timing advance acquisition mechanism, where the control signaling may indicate a configuration for the UE-based timing advance measurement.
  • the UE 115-d may determine the timing advance values for the candidate cells of the set of candidate cells based on the control signaling. For example, in some cases, the UE 115-c may measure a reception time difference between a first reception time of a first signal received from the serving cell and a second reception time of a second signal from the candidate cell. As such, the UE 115-d may determine a timing advance value of a candidate cell based on a second timing advance value of the serving cell and the reception time difference, where selecting the candidate cell may be based on the UE 115-d determining the timing advance value of the candidate cell.
  • the UE 115-d may receive an SSB from a respective candidate cell via the resources indicated via the control signaling for performing a random access procedure. The UE 115-d may then determine a timing advance value of a respective candidate cell based on receiving the SSB from the respective candidate cell, where selecting the candidate cell may be based on the UE 115-d determining the timing advance value of the respective candidate cell.
  • the UE 115-c may select, based on the control signaling, a candidate cell from the set of candidate cells while the UE 115-d may remain connected with the serving cell, the selection being based on the timing advance values from the set of candidate cells. Therefore, at 325, the UE 115-d may receive, from the serving cell, a cell switch command to connect with the selected candidate cell (e.g., the candidate cell selected at 320) .
  • the cell switch command may include a timing advance value for a respective candidate cell in response to the indication received via the control signaling.
  • FIG. 4 shows an example of a wireless communications system 400 that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • the wireless communications system 400 may implement or be implemented by the wireless communications system 100.
  • the wireless communications system 400 may include a UE 115-b, a network entity 105-e within a cell 405-a, a network entity 105-f within a cell 405-b, a network entity 105-g within a cell 405-c, and a network entity 105-h within a cell 405-d, which may be examples of devices described herein with reference to FIG. 1.
  • the UE 115-b may communicate with the network entity 105-e, the network entity 105-f, the network entity 105-g, and the network entity 105-h via a communication link 410-a, a communication link 410-b, a communication link 410-c, and a communication link 410-d respectively.
  • the communication links 410 may include an uplink communication link and a downlink communication link.
  • the communication links 410 may be examples of Uu links, sidelink links, backhaul links, D2D links, or some other type of communication links 125 described herein with reference to FIG. 1.
  • the UE 115-b may be in communication with the network entity 105-e within the cell 405-b.
  • the cell 405-a may be a serving cell for the UE 115-b and the UE 115-b may communicate directly with the network entity 105-e via the communication link 410-a.
  • the UE 115-b may begin to move out of the coverage area of the network entity 105-e and the network entity 105-e may initiate a handover procedure to have the UE 115-e connect with a network entity 105 (e.g., the network entity 105-f, the network entity 105-g, or the network entity 105-h) of a candidate cell.
  • a network entity 105 e.g., the network entity 105-f, the network entity 105-g, or the network entity 105-h
  • the candidate cells may include the cell 405-b, the cell 405-c, or the cell 405-d.
  • the network entity 105-a may transmit a cell switch command 415 to the UE 115-a indicating for the UE 115-a to handover from the cell 405-a to a different cell 405.
  • the cell switch command 415 may indicate that the UE 115-a should connect with the cell 405-b (e.g., the cell 405 illustrated with short dash lines may be the selected cell 405) .
  • the UE 115-b may measure the signal quality of a set of reference signals 420 (e.g., reference signals 420-a, reference signals 420-b, or reference signals 420-b) from a candidate cell (e.g., the cell 405-b, the cell 405-c, or the cell 405-d) to obtain timing and synchronization parameters of the candidate cell.
  • a set of reference signals 420 e.g., reference signals 420-a, reference signals 420-b, or reference signals 420-b
  • a candidate cell e.g., the cell 405-b, the cell 405-c, or the cell 405-d
  • the UE 115-b may support performing signal quality measurements on reference signals 420 before receiving the cell switch command 415.
  • the UE 115-b may support performing signal quality (e.g., L1-RSRP) measurements on the reference signals 420 (e.g., SSBs) before receiving the cell switch command 415.
  • the UE 115-b may transmit a capability message to the network entity 105-e indicating the capability for the UE 115-b to perform the signal quality measurements on the reference signals 420 before the network entity 105-e transmits the cell switch command 415.
  • the network entity 105-e may transmit control signaling 425 that enables the UE 115-b to perform signal quality measurements on reference signals 420 from the candidate cells before receiving the cell switch command 415.
  • the UE 115-b may be enabled, via the control signaling 425 with parameters to perform intra-frequency signal quality measurements on the reference signals 420 (e.g., SSB based intra-frequency L1-RSRP measurements) from the candidate cells. That is, the frequency bands of reference signals 420 used to measure the signal quality may be transmitted using the same frequency band as the resources associated with the candidate cell.
  • the parameters indicated via the control signaling 425 may indicate physical cell IDs and/or logical IDs of the candidate cells (e.g., the cell 405-b, the cell 405-c, and the cell 405-d) . In some cases, the control signaling 425 may indicate a maximum quantity of physical cell IDs.
  • the parameters may also indicate time domain resources associated with the reference signals 420, the time domain resources including an SSB/physical broadcast channel (PBCH) block measurement timing configuration (SMTC) , a periodicity of the reference signals 420, a SSB position in an SSB burst, and a sub-frame offset. Further, the parameters indicated via the control signaling 425 may also indicate a frequency domain location (e.g., a center frequency) , an indication of supported subcarrier spacings, and an RRC parameter ss-PBCH-BlockPower.
  • PBCH physical broadcast channel
  • SMTC block measurement timing configuration
  • control signaling 425 may also indicate a maximum quantity of reference signals 420 to be measured by the UE 115-a, which may be based on the capabilities of the UE 115-a.
  • the indication may indicate a maximum quantity of measured reference signals 420 per cell 405 for a single measurement report (e.g., 1, 2, 3, 4) , a maximum quantity of measured reference signals 420 across the cells 405 for a single measurement report, a maximum quantity of measured candidate cells for a single measurement report, a maximum quantity of measured reference signals 420 per time duration, a maximum quantity of measured candidate cells per time duration (e.g., the time duration being determined by a quantity of slots and reference subcarrier spacings) , or any combination thereof.
  • the UE 115-b may be enabled, via the control signaling 425 with parameters to perform inter-frequency signal quality measurements on the reference signals 420 (e.g., SSB based inter-frequency L1-RSRP measurements) from the candidate cells. That is, the frequency bands of the reference signals 420 used to measure the signal quality may be transmitted using may be at least partially different from resources of the candidate cell.
  • the parameters indicated via the control signaling 425 may indicate physical cell IDs and/or logical IDs of the candidate cells (e.g., the cell 405-b, the cell 405-c, and the cell 405-d) . In some cases, the control signaling 425 may indicate a maximum quantity of physical cell IDs.
  • the parameters may also indicate time domain resources associated with the reference signals 420, the time domain resources including a SMTC, a periodicity of the reference signals 420, a SSB position in an SSB burst, and a sub-frame offset. Additionally, or alternatively, the parameters may indicate whether the UE 115-b may measure simultaneous reference signals 420 (e.g., measure simultaneous SSBs) and a maximum quantity of simultaneous reference signals 420. Further, the parameters indicated via the control signaling 425 may also indicate a frequency domain location (e.g., a center frequency) , an indication of supported subcarrier spacings, an indication of a measurement gap, and an RRC parameter ss-PBCH-BlockPower.
  • a frequency domain location e.g., a center frequency
  • the indication of the measurement gap may indicate whether the reference signals 420 (e.g., the SSB) needs to be outside an active downlink bandwidth part.
  • the indication may also indicate whether a single measurement gap or multiple gaps may be needed for a single measurement report, a minimum distance between measurement gaps, and a maximum quantity of measurement gaps within a time duration.
  • control signaling 425 may also indicate a maximum quantity of reference signals 420 to be measured by the UE 115-a, which may be based on the capabilities of the UE 115-a.
  • the indication may indicate a maximum quantity of measured reference signals 420 per cell 405 for a single measurement report, a maximum quantity of measured reference signals 420 across the cells 405 of a single measurement report, a maximum quantity of measure candidate cells for a single measurement report, or any combination thereof.
  • the indication may indicate a maximum quantity of measured reference signals 420 across the cells 405, a maximum quantity of measured candidate cells, a maximum quantity of measured reference signals 420 per time duration, a maximum quantity of measured candidate cells per time duration, or any combination thereof.
  • the control signaling 425 may also indicate a maximum quantity of measured reference signals 420 per frequency, a maximum quantity of measured candidate cells per frequency, a maximum quantity of measured reference signals 420 across a set of frequencies, a maximum quantity of measured candidate cells across the set of frequencies, a maximum quantity of measured frequencies, or any combination thereof. Moreover, the control signaling 425 may further indicate a maximum quantity of measured reference signals 420 per frequency per time duration, a maximum quantity of measured reference signals 420 across the set of frequencies per time duration, or both.
  • the UE 115-a may support transmitting a beam measurement report to the network entity 105-e.
  • the UE 115-a may be enabled via the control signaling 425 to transmit a beam report for beam selection to be performed across L cells 405 from a configured (e.g., activated) set of cells 405, where M beams are to be reported for each of the L cells 405. Therefore, the UE 115-b may report a quantity of beams equivalent to the product of M and L (e.g., M*L beams) within a single reporting instance.
  • additional UE capabilities may include a maximum quantity of reported candidate reference signals 420 for a single report, a maximum quantity of candidate reference signals 420 per cell 405 for a single report, a maximum quantity of reported candidate cells for a single report, a maximum quantity of CSI report configurations per cell, a maximum quantity of CSI report configurations across the cells 405, or any combination thereof.
  • the beam report may also include the signal quality measurements of the current serving cell (e.g., the cell 405-a) in the measurement report (e.g., L1 measurement report) .
  • the UE 115-b may transmit a downlink and uplink group-based report for candidate cells and the beam report may be transmitted periodically (e.g., via a PUCCH) , semi-persistently (e.g., via a PUCCH or a PUSCH) , or aperiodically (e.g., via a PUSCH) .
  • the UE 115-b or the network entity 105-e may select a candidate cell for the UE 115-b to connect with via the handover procedure. For example, the UE 115-b may determine that based on the signal quality measurements of the reference signals received from the network entity 105-f within the cell 405-b via the communication link 410-b, the UE 115-b should connect with the network entity 105-f within the cell 405-b.
  • the UE 115-b may transmit the selection of the cell 405-b to the network entity 105-e for indication within the cell switch command 415.
  • the network entity 105-e may select the cell 405-b based on comparing the signal quality measurements (e.g., L1-RSRP measurements) of each of the reference signals 420 (e.g., the reference signals 420-a, the reference signals 420-b, and the reference signals 420-c) for each of the candidate cells (e.g., the cell 405-b, the cell 405-c, and the cell 405-d) .
  • the signal quality measurements e.g., L1-RSRP measurements
  • the UE 115-b may receive the cell switch command 415 from the network entity 105-e indicating for the UE 115-b to switch to the selected candidate cell (e.g., the cell 405-b) .
  • the selected candidate cell e.g., the cell 405-b
  • the UE 115-b may perform additional procedures to enhance the reliability, accuracy, and efficiency of the wireless communications system 400. Such additional procedures may be described herein including with reference to FIGs. 5–7.
  • FIG. 5 shows an example of a process flow 500 that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • the process flow 500 may implement or be implemented by the wireless communications system 100 and/or the wireless communications system 400.
  • the process flow 500 may include a UE 115-e, a network entity 105-p, a network entity 105-q, and a network entity 105-r, which may be examples of devices described herein with reference to FIG. 1.
  • the operations between the UE 115-e, the network entity 105-p, the network entity 105-q, and the network entity 105-r may be performed in different orders or at different times. Some operations may also be left out of the process flow 500, or other operations may be added. Although the UE 115-e, the network entity 105-p, the network entity 105-q, and the network entity 105-r are shown performing the operations of the process flow 500, some aspects of some operations may also be performed by one or more other wireless devices.
  • the UE 115-e may receive, from the network entity 105-p within a serving cell, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the UE 115-e may receive, via the control signaling, parameters used to measure the signal quality of the one or more reference signals of the set of reference signals, wherein selecting the candidate cell is based at least in part on signal quality measurements.
  • a frequency band of the one or more reference signals may be the same as a frequency band being used by the candidate cell and the signal quality measurements may be intra-frequency measurements.
  • the parameters may include a physical cell identifier for the candidate cell, a logical identifier of the candidate cell, an indication of time domain resources associated with the one or more reference signals, a periodicity of the one or more reference signals, a subframe offset, a center frequency of the one or more reference signals, a subcarrier spacing of the one or more reference signals, or any combination thereof.
  • a frequency band of the one or more reference signals may be different than a frequency band being used by the candidate cell and the signal quality measurements may be inter-frequency measurements.
  • the parameters may include an indication of whether the UE 115-e is capable of measuring a plurality of reference signals concurrently, an indication associated with a measurement gap, a quantity of measurement gaps, a minimum size of the measurement gap, a maximum size of the measurement gap, and indication of whether the set of reference signals are outside of a bandwidth part, or any combination thereof.
  • the UE 115-e may receive, via the control signaling, an indication of a maximum quantity of reference signals to be measured from the set of reference signals from the set of candidate cells.
  • the UE 115-e may also receive, via the control signaling, parameters associated with transmitting a beam report for selecting beams from a set of beams of one or more candidate cells of the set of candidate cell.
  • the UE 115-e may also indicate the support of performing signal quality measurements (e.g., L1 measurements) for the set of reference signals and reporting the signal quality measurements for the candidate cells and the network entity 105-p may enable the UE 115-e to perform the signal quality measurements via the control signaling.
  • the control signaling may indicate enable the UE 115-e to perform SSB based intra-frequency L1-RSRP measurements.
  • control signaling may also indicate a maximum quantity of candidate cells in an SSB measurement resource configuration, an indication of a time domain configuration for SSBs, an indication of a SSB transmit power, and an indication of a measurement resource signal quantity for any of maximum quantity of measured reference signals per cell for one report, a maximum quantity of measured candidate cells for a single report, a maximum quantity of measured reference signals across a cell, and/or a maximum quantity of measured RSs per time duration, or any combination of such indications.
  • control signaling may enable the UE 115-e to perform SSB based inter-frequency L1-RSRP measurements,
  • the control signaling may indicate a maximum quantity of candidate cells in SSB measurement resource configuration, an indication of a time domain configuration for SSBs, an indication of a frequency domain configuration, an indication of a subcarrier spacing, an indication of an SSB transmit power, or any combination thereof.
  • the control signaling may also indicate a reference signal quantity for any of maximum quantity of measured reference signals per cell per frequency for a single report (e.g., a measurement report) , a maximum quantity of measured candidate cells per frequency for a single report, a maximum quantity of measured reference signals per frequency across a cell, a maximum quantity of measured reference signals per frequency per time duration, a maximum quantity of measured frequencies, and/or a maximum quantity of measured reference signals across frequencies per time duration, or any combination thereof.
  • a reference signal quantity for any of maximum quantity of measured reference signals per cell per frequency for a single report (e.g., a measurement report) , a maximum quantity of measured candidate cells per frequency for a single report, a maximum quantity of measured reference signals per frequency across a cell, a maximum quantity of measured reference signals per frequency per time duration, a maximum quantity of measured frequencies, and/or a maximum quantity of measured reference signals across frequencies per time duration, or any combination thereof.
  • the UE 115-e may support and the control signaling may also enable the UE 115-e transmitting a signal quality measurement (e.g., L1-RSRP measurement) report for the set of candidate cells and the serving cell.
  • the control signaling may indicate a CSI reporting configuration for signal quality measurements on the set of candidate cells, including a maximum quantity of reported RSs per cell in a beam reporting instance, a maximum quantity of reported cells in a beam reporting instance, a maximum quantity of CSI report configurations per serving cell, or any combination thereof.
  • the UE 115-e may indicate support and the network entity 105-p may transmit the control signaling enabling a configuration of a special cell measurement in a signal quality measurement (e.g., L1 measurement) report.
  • the control signaling may also enable the UE 115-e to report channel and time domain behaviors, including any of periodic and semi-persistent report on PUCCH, semi-persistent report on PUSCH, and aperiodic report on PUSCH.
  • the UE 115-e may receive, from the network entity 105-p, the network entity 105-q, and the network entity 105-r, the set of reference signals from the set of candidate cells.
  • the set of reference signals may be SSBs.
  • the UE 115-e may measure the signal quality of one or more references signals of the set of reference signals based on receiving the set of reference signals. Therefore, selecting the candidate cell from the set of candidate cells may be based on the signal quality of the one or more reference signals of the set of reference signals.
  • the UE 115-e may transmit, to the serving cell, the beam report indicating a quantity of beams from the set of beams for a quantity of candidate cells from the set of candidate cells.
  • the beam report may include the signal quality measurements.
  • the UE 115-e may select, based on the control signaling a candidate cell from the set of candidate cells while the UE may remain connected with the serving cell based on the signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells.
  • the UE 115-e may receive from the serving cell, a cell switch command to connect with the selected candidate cell (e.g., the candidate cell selected at 520) .
  • the UE 115-e may receive, via the cell switch command, an indication of one or more beams from the set of beams, the one or more beams being associated with the selected candidate cell.
  • the UE 115-e may receive, via the cell switch command, an indication of one or more beams from the set of beams associated with the selected candidate cell indicated based on transmitting the beam report.
  • FIG. 6 shows an example of a wireless communications system 600 that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • the wireless communications system 600 may implement or be implemented by the wireless communications system 100.
  • the wireless communications system 600 may include a UE 115-c, a network entity 105-i within a cell 605-a, a network entity 105-j within a cell 605-b, a network entity 105-k within a cell 605-c, and a network entity 105-m within a cell 605-c, which may be examples of devices described herein with reference to FIG. 1.
  • the UE 115-c may communicate with the network entity 105-i, the network entity 105-j the network entity 105-k, and the network entity 105-m via a communication link 610-a, a communication link 610-b, a communication link 610-c, and a communication link 610-d respectively.
  • the communication links 610 may include an uplink communication link and a downlink communication link.
  • the communication links 610 may be examples of Uu links, sidelink links, backhaul links, D2D links, or some other type of communication links 125 described herein with reference to FIG. 1.
  • the UE 115-c may be in communication with the network entity 105-i within the cell 605-b.
  • the cell 605-a may be a serving cell for the UE 115-c and the UE 115-c may communicate directly with the network entity 105-i via the communication link 610-a.
  • the UE 115-c may begin to move out of the coverage area of the network entity 105-i and the network entity 105-i may initiate a handover procedure to have the UE 115-c connect with a network entity 105 (e.g., the network entity 105-j, the network entity 105-k, or the network entity 105-m) of a candidate cell.
  • a network entity 105 e.g., the network entity 105-j, the network entity 105-k, or the network entity 105-m
  • the candidate cells may include the cell 605-b, the cell 605-c, or the cell 605-d.
  • the network entity 105-i may transmit a cell switch command 615 to the UE 115-a indicating for the UE 115-c to handover from the cell 605-a to a different cell 605.
  • the cell switch command 615 may indicate that the UE 115-c should connect with the cell 605-b (e.g., the cell 605 illustrated with short dash lines may be the selected cell 605) .
  • the UE 115-c may activate beamforming parameters 620 (e.g., beamforming parameters 620-a, beamforming parameters 620-b, or beamforming parameters 620-c) associated with a TCI state associated with a candidate cell indicated via the cell switch command 615 (e.g., the UE 115-c may activate a TCI state associated with the candidate cell) .
  • the beamforming parameters may indicate parameters associated with a TCI state.
  • the UE 115-c may receive the beamforming parameters 620-a from the network entity 105-j of the cell 605-b based on the cell switch command 615 indicating for the UE 115-c to connect with the cell 605-b.
  • the UE 115-c may receive and activate the beamforming parameters 620 after receiving the cell switch command 615.
  • the activation of the beamforming parameters may introduce some additional latency to the handover procedure which may decrease the reliability of the connection between the UE 115-c and the network entity 105-i and the reliability of the wireless communications system 600.
  • the UE 115-c may receive control signaling 625 to enable the UE 115-c to activate the beamforming parameters 620 before receiving the cell switch command 615.
  • the control signaling 625 may be an example of a MAC-CE for lower layer mobility handover triggering.
  • the control signaling 625 may indicate information to identify a target cell or multiple target cells from the candidate cells (e.g., the cell 605-b, the cell 605-c, and the cell 605-d) and timing advance information for the candidate cells which may be acquired according to the techniques described herein with reference to FIG. 2.
  • control signaling 625 may indicate beamforming parameters 620 for a joint TCI state or a pair of an uplink TCI state and a downlink TCI state unified TCI state index for the indicated target cell (e.g., the cell 605-b) . Additionally, or alternatively, there may be a field present within the cell switch command 615 to indicate the TCI state unified index or pair of uplink and downlink unified TCI state index for the target cell. Further, the control signaling 625 may also indicate active downlink and active uplink bandwidth parts for the target cell.
  • the control signaling 625 may also indicate triggering information for a beam management report of the target cell and resources for reporting the beam management report to the target cell. In some cases, the control signaling 625 may also indicate triggering information for an aperiodic SRS transmission to the target cell or tracking reference signal (TRS) transmission from the target cell. In some other cases, the control signaling 625 may indicate triggering information for a CSI acquisition of the target cell and resources for transmitting a CSI report to the target cell or triggering of a contention based random access (CBRA) procedure. Moreover, the control signaling 625 may also include an indication of a C-RNTI of the target cell and each field within the control signaling may be present, configurable, or both.
  • TRS tracking reference signal
  • the UE 115-c may support receiving a TCI indication together with the cell switch command 615.
  • the UE 115-c may receive the beamforming parameters 620 for a TCI state activation of a candidate cell (e.g., the cell 605-b, the cell 605-c, or the cell 605-d) before a reception of a TCI state indication of the candidate cell.
  • the UE 115-c may receive the beamforming parameters 620 for a TCI state activation together with a reception of a TCI state indication of the candidate cell.
  • the UE 115-c may receive the TCI state indication together with the cell switch command 615.
  • a beam indication for the target cell or target cells may be conveyed via the control signaling 625 (e.g., via the MAC-CE used for lower layer mobility triggering) .
  • a unified TCI state framework based beam indication may be included in the cell switch command 615.
  • the UE 115-c may apply the beam indication to signals, channels, or both that follow or may be configured to follow the unified TCI state at the target cell (s) .
  • the UE 115-c may apply the beam indication to all signals, channels, or both at the target cell (s) .
  • the control signaling 625 may include an association between a QCL reference signal of an indicated TCI state and an SSB. The association may further indicate the index of the SSB, a subcarrier spacing, a carrier, and a physical cell identifier.
  • the UE 115-c may support receiving a TCI indication before the cell switch command 615.
  • the UE 115-c may receive the beamforming parameters 620 for a TCI state activation before a reception of a beam indication of the candidate cell (e.g., the cell 605-b, the cell 605-c, or the cell 605-d) .
  • the UE 115-c may receive the beam indication before the cell switch command 615.
  • control signaling 625 may include an association between a QCL reference signal of an indicated TCI state and an SSB and the association may further indicate the index of the SSB, a subcarrier spacing, a carrier, and a physical cell identifier.
  • the UE 115-c may receive the TCI indication after the cell switch command 615.
  • the UE 115-c may receive the beamforming parameters for a TCI state activation of a candidate cell before or together with a beam indication of the candidate cell. Further, in such cases, the UE 115-c may receive the beam indication after the cell switch command 615.
  • the UE 115-c may receive the beam indication of the target cell (s) and the TCI state activation for the candidate cell (s) via an indicated TCI state index.
  • the TCI state index may indicate a maximum quantity of activated TCIs per candidate cell, a maximum quantity of activated TCIs for candidate cells across all component carriers, a maximum quantity of activated TCIs for the serving cell (e.g., the cell 605-a) and the candidate cells (e.g., the cell 605-b, the cell 605-c, and the cell 605-d) where the quantity of activate TCIs may be based on the capabilities of the UE 115-c, or any combination thereof.
  • the TCI state index may also indicate a unified TCI type per candidate cell, a maximum quantity of configured TCIs per candidate cell, a maximum quantity of configured TCIs per TCI type per candidate cell, a maximum quantity of configured TCIs across the candidate cells, a maximum quantity of component carrier lists for a common-beam indication, a maximum quantity of configured candidate cells (e.g., for L1 measurements, TCI state activation, or both) , or any combination thereof.
  • control signaling 625 may indicate for the UE 115-c to synchronize with some of the candidate cells based on the UE 115-c supporting downlink synchronization for the candidate cells based on an SSB received before the cell switch command 615. That is, the UE 115-c may synchronize the timing with the network entity 105 of some of the candidate cells to further decrease the latency associated with the UE 115-c connecting with the selected candidate cell (e.g., the cell 605-b) during the handover procedure. Additionally, or alternatively, the control signaling 625 may also indicate a maximum quantity of candidate cells the UE 115-c may synchronize with (e.g., based on the capabilities of the UE 115-c) .
  • control signaling 625 may also indicate a beam application time for the UE 115-c to apply a beam or set of beams of the selected candidate cell.
  • the beam application time may be the same or different from the beam application without a serving cell change.
  • the bema application time may be based on subframes and slots (e.g., ) , a beam application timer (e.g., BeamAppTime-r17) , a time to apply RRC parameters for a target cell, a radio frequency tuning time when the UE 115-c performs inter-cell switching, whether the target cell is the previously activate cell (e.g., the current serving cell, the cell 605-a) , whether multiple target cells are indicated, or any combination thereof.
  • a beam application timer e.g., BeamAppTime-r17
  • the latency associated with the handover procedure may be reduced. That is, the UE 115-c may be able to connect with the selected target cell (e.g., the cell 605-b) faster therefore enhancing the reliability of the wireless communications system. Further description of the techniques described herein to enhance the reliability, accuracy, and efficiency of the wireless communications system 600 may be described elsewhere herein including with reference to FIG 7.
  • FIG. 7 shows an example of a process flow 700 that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • the process flow 700 may implement or be implemented by the wireless communications system 100 and/or the wireless communications system 600.
  • the process flow 700 may include a UE 115-f and a network entity 105-s, which may be examples of devices described herein with reference to FIG. 1.
  • the operations between the UE 115-f and the network entity 105-s may be performed in different orders or at different times. Some operations may also be left out of the process flow 700, or other operations may be added. Although the UE 115-f and the network entity 105-s are shown performing the operations of the process flow 700, some aspects of some operations may also be performed by one or more other wireless devices.
  • the UE 115-f may receive, from the network entity 105-s of a serving cell connected with the UE 115-f, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the UE 115-f may receive, via the control signaling, an indication of one or more parameters associated with the lower layer mobility triggered handover procedure, where selecting the candidate cell may be based on the one or more parameters.
  • the one or more parameters may include information to identify a target candidate cell from the set of candidate cells, timing advance information, an indication of a joint or pair of beamforming parameters for the target candidate cell, an indication of set of active downlink bandwidth parts and a set of active uplink bandwidth parts, a set of triggers for receiving reference signals from the target candidate cell, a set of triggers for transmitting a beam management report to the target candidate cell, a trigger for transmitting a channel state information report, a trigger for initiating a contention-based random access procedure, an indication of a network identifier of the target candidate cell, or any combination thereof.
  • the UE 115-f may receive, via the control signaling, an indication for the UE to synchronize downlink signaling with one or more candidate cells from the set of candidate cells, where the candidate cell may be selected from the one or more candidate cells based on the UE being synchronized with the one or more candidate cells.
  • the UE 115-f may receive, from the set of candidate cells, a set of reference signals for synchronization with the set of candidate cells, where the set of reference signals may be received prior to the UE 115-f receiving a cell switch command.
  • the UE 115-f may then synchronize with one or more candidate cells of the set of candidate cells based at least in part on receiving the set of reference signals from the one or more candidate cells.
  • the UE 115-f may receive, via the control signaling, a beam indication for a subset of candidate cells within the set of candidate cells and an activation of a beam included in the beam indication for the candidate cell, where selecting of the candidate cell may be based on the beam indication.
  • the beam indication may include a maximum quantity of activated beamforming parameters per candidate cell of the set of candidate cells, a maximum quantity of activated beamforming parameters for the set of candidate cells across a set of carrier components, a maximum quantity of activated beamforming parameters for the serving cell and the set of candidate cells, a beamforming parameter type per candidate cell of set of candidate cells, a maximum quantity of configured beamforming parameters per candidate cell of the set of candidate cells, a maximum quantity of configured beamforming parameters across the set of candidate cells, a maximum quantity of component carrier lists for the beam indication, a maximum quantity of configured candidate cells for beamforming parameter activation, or any combination thereof.
  • the UE 115-f may indicate the support for and the control signaling may enable a single active TCI per candidate cell before cell switch command including the maximum quantity of supported active TCIs across cells, and/or an additional indication of multiple active TCIs per cell including the multiple TCI activation per cell before cell switch command with the maximum quantity of supported active TCIs per cell and the maximum quantity of supported active TCIs across cells.
  • the UE 115-f may indicate the support for and the control signaling may enable a single active TCI per candidate cell before cell switch command, including the maximum quantity of active TCIs across cell. Additionally, or alternatively, the control signaling may indicate a separate downlink and uplink TCI type and enable the UE 115-0f to receive the TCI indication together with cell switch command The control signaling may also indicate a TCI activation per candidate cell before cell switch command or a TCI activation per candidate cell with cell switch command.
  • the control signaling may indicate a pair of downlink and uplink active TCIs per candidate cell before the cell switch command, with the maximum quantity of supported downlink and uplink active TCIs across cells, and/or indicate multiple downlink and uplink active TCIs per cell with indication of the multiple downlink and uplink TCI activation per cell before the cell switch command, the maximum quantity of supported downlink and uplink active TCIs per cell, the maximum quantity of supported downlink and uplink active TCIs across cells, or any combination thereof.
  • the UE 115-f may receive, prior to receiving the cell switch command, an indication of an activation of the beamforming parameters based on receiving the control signaling where the UE 115-f may connect with a selected candidate cell based on the activation of the beamforming parameters. As such, the UE 115-f may activate the beamforming parameters.
  • the UE 115-f may select a candidate cell from the set of candidate cells while the UE may remain connected with the serving cell based on the beamforming parameters. For example, the UE 115-f may select the candidate cell based on activating the beamforming parameters for the candidate cell. In some cases, the UE 115-f may select the candidate cell from one or more candidate cells that the UE 115-f may be synchronized with.
  • the UE 115-f may receive, from the serving cell, a cell switch command to connect with the selected candidate cell.
  • the UE 115-f may receive, via the cell switch command, indication of an activation of the beamforming parameters based on receiving the control signaling, where the UE may connect with the selected candidate cell based on the activation of the beamforming parameters.
  • FIG. 8 shows a block diagram 800 of a device 805 that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • the device 805 may be an example of aspects of a UE 115 as described herein.
  • the device 805 may include a receiver 810, a transmitter 815, and a communications manager 820.
  • the device 805, or one or more components of the device 805 may include at least one processor, which may be coupled with at least one memory, to, individually or collectively, support or enable the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 810 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to signaling for lower layer triggered mobility handovers) . Information may be passed on to other components of the device 805.
  • the receiver 810 may utilize a single antenna or a set of multiple antennas.
  • the transmitter 815 may provide a means for transmitting signals generated by other components of the device 805.
  • the transmitter 815 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to signaling for lower layer triggered mobility handovers) .
  • the transmitter 815 may be co-located with a receiver 810 in a transceiver module.
  • the transmitter 815 may utilize a single antenna or a set of multiple antennas.
  • the communications manager 820, the receiver 810, the transmitter 815, or various combinations thereof or various components thereof may be examples of means for performing various aspects of signaling for lower layer triggered mobility handovers as described herein.
  • the communications manager 820, the receiver 810, the transmitter 815, or various combinations or components thereof may be capable of performing one or more of the functions described herein.
  • the communications manager 820, the receiver 810, the transmitter 815, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) .
  • the hardware may include at least one of a processor, a digital signal processor (DSP) , a central processing unit (CPU) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure.
  • DSP digital signal processor
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • FPGA field-programmable gate array
  • microcontroller discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure.
  • At least one processor and at least one memory coupled with the at least one processor may be configured to perform one or more of the functions described herein (e.g., by one or more processors, individually or collectively, executing instructions stored in the at least one memory) .
  • the communications manager 820, the receiver 810, the transmitter 815, or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by at least one processor. If implemented in code executed by at least one processor, the functions of the communications manager 820, the receiver 810, the transmitter 815, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure) .
  • code e.g., as communications management software or firmware
  • the communications manager 820 may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 810, the transmitter 815, or both.
  • the communications manager 820 may receive information from the receiver 810, send information to the transmitter 815, or be integrated in combination with the receiver 810, the transmitter 815, or both to obtain information, output information, or perform various other operations as described herein.
  • the communications manager 820 may support wireless communications in accordance with examples as disclosed herein.
  • the communications manager 820 is capable of, configured to, or operable to support a means for receiving, from a serving cell connected with the UE, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the communications manager 820 is capable of, configured to, or operable to support a means for selecting, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the timing advance values from the set of candidate cells.
  • the communications manager 820 is capable of, configured to, or operable to support a means for receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the communications manager 820 may support wireless communications in accordance with examples as disclosed herein.
  • the communications manager 820 is capable of, configured to, or operable to support a means for receiving, from a serving cell connected with the UE, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the communications manager 820 is capable of, configured to, or operable to support a means for selecting, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells.
  • the communications manager 820 is capable of, configured to, or operable to support a means for receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the communications manager 820 may support wireless communications in accordance with examples as disclosed herein.
  • the communications manager 820 is capable of, configured to, or operable to support a means for receiving, from a serving cell connected with the UE, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the communications manager 820 is capable of, configured to, or operable to support a means for selecting a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the beamforming parameters.
  • the communications manager 820 is capable of, configured to, or operable to support a means for receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the device 805 e.g., at least one processor controlling or otherwise coupled with the receiver 810, the transmitter 815, the communications manager 820, or a combination thereof
  • the device 805 may support techniques for a UE 115 to receive control signaling for a lower layered mobility handover procedure for reduced processing, reduced power consumption, and more efficient utilization of communication resources.
  • FIG. 9 shows a block diagram 900 of a device 905 that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • the device 905 may be an example of aspects of a device 805 or a UE 115 as described herein.
  • the device 905 may include a receiver 910, a transmitter 915, and a communications manager 920.
  • the device 905, or one of more components of the device 905 e.g., the receiver 910, the transmitter 915, and the communications manager 920
  • Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 910 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to signaling for lower layer triggered mobility handovers) . Information may be passed on to other components of the device 905.
  • the receiver 910 may utilize a single antenna or a set of multiple antennas.
  • the transmitter 915 may provide a means for transmitting signals generated by other components of the device 905.
  • the transmitter 915 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to signaling for lower layer triggered mobility handovers) .
  • the transmitter 915 may be co-located with a receiver 910 in a transceiver module.
  • the transmitter 915 may utilize a single antenna or a set of multiple antennas.
  • the device 905, or various components thereof may be an example of means for performing various aspects of signaling for lower layer triggered mobility handovers as described herein.
  • the communications manager 920 may include a control signaling receiver 925, a candidate cell selection component 930, a cell switch command receiver 935, or any combination thereof.
  • the communications manager 920 may be an example of aspects of a communications manager 820 as described herein.
  • the communications manager 920, or various components thereof may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 910, the transmitter 915, or both.
  • the communications manager 920 may receive information from the receiver 910, send information to the transmitter 915, or be integrated in combination with the receiver 910, the transmitter 915, or both to obtain information, output information, or perform various other operations as described herein.
  • the communications manager 920 may support wireless communications in accordance with examples as disclosed herein.
  • the control signaling receiver 925 is capable of, configured to, or operable to support a means for receiving, from a serving cell connected with the UE, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the candidate cell selection component 930 is capable of, configured to, or operable to support a means for selecting, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the timing advance values from the set of candidate cells.
  • the cell switch command receiver 935 is capable of, configured to, or operable to support a means for receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the communications manager 920 may support wireless communications in accordance with examples as disclosed herein.
  • the control signaling receiver 925 is capable of, configured to, or operable to support a means for receiving, from a serving cell connected with the UE, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the candidate cell selection component 930 is capable of, configured to, or operable to support a means for selecting, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells.
  • the cell switch command receiver 935 is capable of, configured to, or operable to support a means for receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the communications manager 920 may support wireless communications in accordance with examples as disclosed herein.
  • the control signaling receiver 925 is capable of, configured to, or operable to support a means for receiving, from a serving cell connected with the UE, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the candidate cell selection component 930 is capable of, configured to, or operable to support a means for selecting a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the beamforming parameters.
  • the cell switch command receiver 935 is capable of, configured to, or operable to support a means for receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • FIG. 10 shows a block diagram 1000 of a communications manager 1020 that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • the communications manager 1020 may be an example of aspects of a communications manager 820, a communications manager 920, or both, as described herein.
  • the communications manager 1020, or various components thereof, may be an example of means for performing various aspects of signaling for lower layer triggered mobility handovers as described herein.
  • the communications manager 1020 may include a control signaling receiver 1025, a candidate cell selection component 1030, a cell switch command receiver 1035, a reception time measurement component 1040, a timing advance value component 1045, a timing advance value storage indication component 1050, a reference signal receiver 1055, a reference signal measurement component 1060, a candidate cell synchronization component 1065, an SSB receiver 1070, a beam report transmitter 1075, or any combination thereof.
  • Each of these components, or components or subcomponents thereof e.g., one or more processors, one or more memories
  • the communications manager 1020 may support wireless communications in accordance with examples as disclosed herein.
  • the control signaling receiver 1025 is capable of, configured to, or operable to support a means for receiving, from a serving cell connected with the UE, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the candidate cell selection component 1030 is capable of, configured to, or operable to support a means for selecting, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the timing advance values from the set of candidate cells.
  • the cell switch command receiver 1035 is capable of, configured to, or operable to support a means for receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • control signaling receiver 1025 is capable of, configured to, or operable to support a means for receiving, via the control signaling, an indication of whether the UE acquires a timing advance value of the candidate cell before receiving the cell switch command by UE-measurements of reference signals, by random access procedures, or both, where selecting the candidate cell is based on receiving the indication.
  • control signaling receiver 1025 is capable of, configured to, or operable to support a means for receiving, via the control signaling, an indication that the timing advance values are based on a reception time difference between the serving cell and a respective candidate cell and a timing advance value for the serving cell, where selecting the candidate cell is based on receiving the indication.
  • the reception time measurement component 1040 is capable of, configured to, or operable to support a means for measuring a reception time difference between a first reception time of a first signal received from the serving cell and a second reception time of a second signal from the candidate cell.
  • the timing advance value component 1045 is capable of, configured to, or operable to support a means for determining a timing advance value of the candidate cell based on a second timing advance value of the serving cell and the reception time difference, where selecting the candidate cell is based on determining the timing advance value of the candidate cell.
  • control signaling receiver 1025 is capable of, configured to, or operable to support a means for receiving, via the control signaling, an indication of resources for performing a random access procedure with the set of candidate cells to acquire the timing advance values of the set of candidate cells, where selecting the candidate cell is based on receiving the indication.
  • control signaling includes downlink control information and includes an identifier of the candidate cell.
  • the SSB receiver 1070 is capable of, configured to, or operable to support a means for receiving a synchronization signal block from a respective candidate cell via the resources included in the indication.
  • the timing advance value component 1045 is capable of, configured to, or operable to support a means for determining a timing advance value of the respective candidate cell based on receiving the synchronization signal block from the respective candidate cell, where selecting the candidate cell is based on determining the timing advance value of the respective candidate cell.
  • control signaling receiver 1025 is capable of, configured to, or operable to support a means for receiving, via the control signaling, an indication of whether the serving cell, the candidate cells from the set of candidate cells, or both, are to transmit a random access response in response to a random access preamble from the UE as part of acquiring the timing advance values using the random access procedure.
  • the cell switch command includes a timing advance value for a respective candidate cell in response to the control signaling indicating that the serving cell and the set of candidate cells are to refrain from transmitting the random access response.
  • the timing advance value storage indication component 1050 is capable of, configured to, or operable to support a means for transmitting, to the serving cell, an indication of a maximum quantity of timing advance values for different cells that the UE is capable of storing, where receiving the control signaling is based on transmitting the indication.
  • the communications manager 1020 may support wireless communications in accordance with examples as disclosed herein.
  • the control signaling receiver 1025 is capable of, configured to, or operable to support a means for receiving, from a serving cell connected with the UE, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the candidate cell selection component 1030 is capable of, configured to, or operable to support a means for selecting, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells.
  • the cell switch command receiver 1035 is capable of, configured to, or operable to support a means for receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the reference signal receiver 1055 is capable of, configured to, or operable to support a means for receiving the set of reference signals from the set of candidate cells.
  • the reference signal measurement component 1060 is capable of, configured to, or operable to support a means for measuring the signal quality of one or more references signals of the set of reference signals based on receiving the set of reference signals, where selecting the candidate cell from the set of candidate cells is based on the signal quality of the one or more reference signals of the set of reference signals.
  • control signaling receiver 1025 is capable of, configured to, or operable to support a means for receiving, via the control signaling, parameters used to measure the signal quality of the one or more reference signals of the set of reference signals, where selecting the candidate cell is based on the signal quality measurements.
  • the parameters include a physical cell identifier for the candidate cell, a logical identifier of the candidate cell, an indication of time domain resources associated with the one or more reference signals, a periodicity of the one or more reference signals, a subframe offset, a center frequency of the one or more reference signals, a subcarrier spacing of the one or more reference signals, or any combination thereof.
  • the parameters include an indication of whether the UE is capable of measuring a set of multiple reference signals concurrently, an indication associated with a measurement gap, a quantity of measurement gaps, a minimum size of the measurement gap, a maximum size of the measurement gap, and indication of whether the set of reference signals are outside of a bandwidth part, or any combination thereof.
  • a frequency band of the one or more reference signals is the same as a frequency band being used by the candidate cell and the signal quality measurements are intra-frequency measurements.
  • a frequency band of the one or more reference signals is different than a frequency band being used by the candidate cell and the signal quality measurements are inter-frequency measurements.
  • control signaling receiver 1025 is capable of, configured to, or operable to support a means for receiving, via the control signaling, an indication of a maximum quantity of reference signals to be measured from the set of reference signals from the set of candidate cells.
  • control signaling receiver 1025 is capable of, configured to, or operable to support a means for receiving, via the control signaling, parameters associated with transmitting a beam report for selecting beams from a set of beams of one or more candidate cells of the set of candidate cells.
  • cell switch command receiver 1035 is capable of, configured to, or operable to support a means for receiving, via the cell switch command, an indication of one or more beams from the set of beams, the one or more beams being associated with the selected candidate cell.
  • the beam report transmitter 1075 is capable of, configured to, or operable to support a means for transmitting, to the serving cell, the beam report indicating a quantity of beams from the set of beams for a quantity of candidate cells from the set of candidate cells.
  • the cell switch command receiver 1035 is capable of, configured to, or operable to support a means for receiving, via the cell switch command, an indication of one or more beams from the set of beams associated with the selected candidate cell indicated based as least in part on transmitting the beam report.
  • the set of reference signals include synchronization signal blocks.
  • the communications manager 1020 may support wireless communications in accordance with examples as disclosed herein.
  • the control signaling receiver 1025 is capable of, configured to, or operable to support a means for receiving, from a serving cell connected with the UE, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the candidate cell selection component 1030 is capable of, configured to, or operable to support a means for selecting a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the beamforming parameters.
  • the cell switch command receiver 1035 is capable of, configured to, or operable to support a means for receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • control signaling receiver 1025 is capable of, configured to, or operable to support a means for receiving, via the control signaling, an indication of one or more parameters associated with the lower layer mobility triggered handover procedure, where selecting the candidate cell is based on the one or more parameters.
  • the one or more parameters include information to identify a target candidate cell from the set of candidate cells, timing advance information, an indication of a joint or pair of beamforming parameters for the target candidate cell, an indication of set of active downlink bandwidth parts and a set of active uplink bandwidth parts, a set of triggers for receiving reference signals from the target candidate cell, a set of triggers for transmitting a beam management report to the target candidate cell, a trigger for transmitting a channel state information report, a trigger for initiating a contention-based random access procedure, an indication of a network identifier of the target candidate cell, or any combination thereof.
  • the cell switch command receiver 1035 is capable of, configured to, or operable to support a means for receiving, via the cell switch command, an indication of an activation of the beamforming parameters based on receiving the control signaling, where the UE connects with the selected candidate cell based on the activation of the beamforming parameters.
  • the cell switch command receiver 1035 is capable of, configured to, or operable to support a means for receiving, prior to receiving the cell switch command, an indication of an activation of the beamforming parameters based on receiving the control signaling where the UE connects with the selected candidate cell based on the activation of the beamforming parameters.
  • control signaling receiver 1025 is capable of, configured to, or operable to support a means for receiving, via the control signaling, a beam indication for a subset of candidate cells within the set of candidate cells and an activation of a beam included in the beam indication for the candidate cell, where selecting of the candidate cell is based on the beam indication.
  • the beam indication includes a maximum quantity of activated beamforming parameters per candidate cell of the set of candidate cells, a maximum quantity of activated beamforming parameters for the set of candidate cells across a set of carrier components, a maximum quantity of activated beamforming parameters for the serving cell and the set of candidate cells, a beamforming parameter type per candidate cell of set of candidate cells, a maximum quantity of configured beamforming parameters per candidate cell of the set of candidate cells, a maximum quantity of configured beamforming parameters across the set of candidate cells, a maximum quantity of component carrier lists for the beam indication, a maximum quantity of configured candidate cells for beamforming parameter activation, or any combination thereof.
  • control signaling receiver 1025 is capable of, configured to, or operable to support a means for receiving, via the control signaling, an indication for the UE to synchronize downlink signaling with one or more candidate cells from the set of candidate cells, where the candidate cell is selected from the one or more candidate cells based on the UE being synchronized with the one or more candidate cells.
  • the reference signal receiver 1055 is capable of, configured to, or operable to support a means for receiving, from the set of candidate cells, a set of reference signals for synchronization with the set of candidate cells, where the set of reference signals are received prior to the cell switch command.
  • the candidate cell synchronization component 1065 is capable of, configured to, or operable to support a means for synchronizing with one or more candidate cells of the set of candidate cells based on receiving the set of reference signals from the one or more candidate cells.
  • the candidate cell selection component 1030 is capable of, configured to, or operable to support a means for selecting the candidate cell from the one or more candidate cells based on the UE being synchronized with the candidate cell.
  • control signaling receiver 1025 is capable of, configured to, or operable to support a means for receiving, via the control signaling, an indication of a set of beam application times associated with one or more candidate cells from the set of candidate cells, where a respective beam application time of a respective candidate cell is the same as a second beam application time associated with the serving cell or is different from the second beam application time, and where selecting the candidate cell is based on the set of beam application times.
  • FIG. 11 shows a diagram of a system 1100 including a device 1105 that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • the device 1105 may be an example of or include the components of a device 805, a device 905, or a UE 115 as described herein.
  • the device 1105 may communicate (e.g., wirelessly) with one or more network entities 105, one or more UEs 115, or any combination thereof.
  • the device 1105 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager 1120, an input/output (I/O) controller 1110, a transceiver 1115, an antenna 1125, at least one memory 1130, code 1135, and at least one processor 1140. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 1145) .
  • a bus 1145 e.g., a bus 1145
  • the I/O controller 1110 may manage input and output signals for the device 1105.
  • the I/O controller 1110 may also manage peripherals not integrated into the device 1105.
  • the I/O controller 1110 may represent a physical connection or port to an external peripheral.
  • the I/O controller 1110 may utilize an operating system such as or another known operating system.
  • the I/O controller 1110 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device.
  • the I/O controller 1110 may be implemented as part of one or more processors, such as the at least one processor 1140.
  • a user may interact with the device 1105 via the I/O controller 1110 or via hardware components controlled by the I/O controller 1110.
  • the device 1105 may include a single antenna 1125. However, in some other cases, the device 1105 may have more than one antenna 1125, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • the transceiver 1115 may communicate bi-directionally, via the one or more antennas 1125, wired, or wireless links as described herein.
  • the transceiver 1115 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 1115 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 1125 for transmission, and to demodulate packets received from the one or more antennas 1125.
  • the transceiver 1115 may be an example of a transmitter 815, a transmitter 915, a receiver 810, a receiver 910, or any combination thereof or component thereof, as described herein.
  • the at least one memory 1130 may include random access memory (RAM) and read-only memory (ROM) .
  • the at least one memory 1130 may store computer-readable, computer-executable code 1135 including instructions that, when executed by the at least one processor 1140, cause the device 1105 to perform various functions described herein.
  • the code 1135 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory.
  • the code 1135 may not be directly executable by the at least one processor 1140 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • the at least one memory 1130 may contain, among other things, a basic I/O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • BIOS basic I/O system
  • the at least one processor 1140 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) .
  • the at least one processor 1140 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into the at least one processor 1140.
  • the at least one processor 1140 may be configured to execute computer-readable instructions stored in a memory (e.g., the at least one memory 1130) to cause the device 1105 to perform various functions (e.g., functions or tasks supporting signaling for lower layer triggered mobility handovers) .
  • the device 1105 or a component of the device 1105 may include at least one processor 1140 and at least one memory 1130 coupled with or to the at least one processor 1140, the at least one processor 1140 and at least one memory 1130 configured to perform various functions described herein.
  • the at least one processor 1140 may include multiple processors and the at least one memory 1130 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein.
  • the communications manager 1120 may support wireless communications in accordance with examples as disclosed herein.
  • the communications manager 1120 is capable of, configured to, or operable to support a means for receiving, from a serving cell connected with the UE, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the communications manager 1120 is capable of, configured to, or operable to support a means for selecting, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the timing advance values from the set of candidate cells.
  • the communications manager 1120 is capable of, configured to, or operable to support a means for receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the communications manager 1120 may support wireless communications in accordance with examples as disclosed herein.
  • the communications manager 1120 is capable of, configured to, or operable to support a means for receiving, from a serving cell connected with the UE, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the communications manager 1120 is capable of, configured to, or operable to support a means for selecting, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells.
  • the communications manager 1120 is capable of, configured to, or operable to support a means for receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the communications manager 1120 may support wireless communications in accordance with examples as disclosed herein.
  • the communications manager 1120 is capable of, configured to, or operable to support a means for receiving, from a serving cell connected with the UE, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the communications manager 1120 is capable of, configured to, or operable to support a means for selecting a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the beamforming parameters.
  • the communications manager 1120 is capable of, configured to, or operable to support a means for receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the device 1105 may support techniques for a UE 115 to receive control signaling for a lower layered mobility handover procedure for improved communication reliability, reduced latency, improved user experience related to reduced processing, reduced power consumption, more efficient utilization of communication resources, improved coordination between devices, longer battery life, and improved utilization of processing capability.
  • the communications manager 1120 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver 1115, the one or more antennas 1125, or any combination thereof.
  • the communications manager 1120 is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager 1120 may be supported by or performed by the at least one processor 1140, the at least one memory 1130, the code 1135, or any combination thereof.
  • the code 1135 may include instructions executable by the at least one processor 1140 to cause the device 1105 to perform various aspects of signaling for lower layer triggered mobility handovers as described herein, or the at least one processor 1140 and the at least one memory 1130 may be otherwise configured to, individually or collectively, perform or support such operations.
  • FIG. 12 shows a block diagram 1200 of a device 1205 that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • the device 1205 may be an example of aspects of a network entity 105 as described herein.
  • the device 1205 may include a receiver 1210, a transmitter 1215, and a communications manager 1220.
  • the device 1205, or one or more components of the device 1205 may include at least one processor, which may be coupled with at least one memory, to, individually or collectively, support or enable the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 1210 may provide a means for obtaining (e.g., receiving, determining, identifying) information such as user data, control information, or any combination thereof (e.g., I/Q samples, symbols, packets, protocol data units, service data units) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) .
  • Information may be passed on to other components of the device 1205.
  • the receiver 1210 may support obtaining information by receiving signals via one or more antennas. Additionally, or alternatively, the receiver 1210 may support obtaining information by receiving signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.
  • the transmitter 1215 may provide a means for outputting (e.g., transmitting, providing, conveying, sending) information generated by other components of the device 1205.
  • the transmitter 1215 may output information such as user data, control information, or any combination thereof (e.g., I/Q samples, symbols, packets, protocol data units, service data units) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) .
  • the transmitter 1215 may support outputting information by transmitting signals via one or more antennas. Additionally, or alternatively, the transmitter 1215 may support outputting information by transmitting signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.
  • the transmitter 1215 and the receiver 1210 may be co-located in a transceiver, which may include or be coupled with a modem.
  • the communications manager 1220, the receiver 1210, the transmitter 1215, or various combinations thereof or various components thereof may be examples of means for performing various aspects of signaling for lower layer triggered mobility handovers as described herein.
  • the communications manager 1220, the receiver 1210, the transmitter 1215, or various combinations or components thereof may be capable of performing one or more of the functions described herein.
  • the communications manager 1220, the receiver 1210, the transmitter 1215, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) .
  • the hardware may include at least one of a processor, a DSP, a CPU, an ASIC, an FPGA or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure.
  • at least one processor and at least one memory coupled with the at least one processor may be configured to perform one or more of the functions described herein (e.g., by one or more processors, individually or collectively, executing instructions stored in the at least one memory) .
  • the communications manager 1220, the receiver 1210, the transmitter 1215, or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by at least one processor. If implemented in code executed by at least one processor, the functions of the communications manager 1220, the receiver 1210, the transmitter 1215, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure) .
  • code e.g., as communications management software or firmware
  • the communications manager 1220 may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 1210, the transmitter 1215, or both.
  • the communications manager 1220 may receive information from the receiver 1210, send information to the transmitter 1215, or be integrated in combination with the receiver 1210, the transmitter 1215, or both to obtain information, output information, or perform various other operations as described herein.
  • the communications manager 1220 may support wireless communications in accordance with examples as disclosed herein.
  • the communications manager 1220 is capable of, configured to, or operable to support a means for transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the communications manager 1220 is capable of, configured to, or operable to support a means for receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the timing advance values from the set of candidate cells.
  • the communications manager 1220 is capable of, configured to, or operable to support a means for transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on the indication of the selected candidate cell.
  • the communications manager 1220 may support wireless communications in accordance with examples as disclosed herein.
  • the communications manager 1220 is capable of, configured to, or operable to support a means for transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the communications manager 1220 is capable of, configured to, or operable to support a means for receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells.
  • the communications manager 1220 is capable of, configured to, or operable to support a means for transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on the indication of the selected candidate cell.
  • the communications manager 1220 may support wireless communications in accordance with examples as disclosed herein.
  • the communications manager 1220 is capable of, configured to, or operable to support a means for transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the communications manager 1220 is capable of, configured to, or operable to support a means for receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the beamforming parameters.
  • the communications manager 1220 is capable of, configured to, or operable to support a means for transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on selecting the candidate cell.
  • the device 1205 may support techniques for a UE 115 to receive control signaling for a lower layered mobility handover procedure for reduced processing, reduced power consumption, and more efficient utilization of communication resources.
  • FIG. 13 shows a block diagram 1300 of a device 1305 that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • the device 1305 may be an example of aspects of a device 1205 or a network entity 105 as described herein.
  • the device 1305 may include a receiver 1310, a transmitter 1315, and a communications manager 1320.
  • the device 1305, or one of more components of the device 1305 may include at least one processor, which may be coupled with at least one memory, to support the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 1310 may provide a means for obtaining (e.g., receiving, determining, identifying) information such as user data, control information, or any combination thereof (e.g., I/Q samples, symbols, packets, protocol data units, service data units) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) .
  • Information may be passed on to other components of the device 1305.
  • the receiver 1310 may support obtaining information by receiving signals via one or more antennas. Additionally, or alternatively, the receiver 1310 may support obtaining information by receiving signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.
  • the transmitter 1315 may provide a means for outputting (e.g., transmitting, providing, conveying, sending) information generated by other components of the device 1305.
  • the transmitter 1315 may output information such as user data, control information, or any combination thereof (e.g., I/Q samples, symbols, packets, protocol data units, service data units) associated with various channels (e.g., control channels, data channels, information channels, channels associated with a protocol stack) .
  • the transmitter 1315 may support outputting information by transmitting signals via one or more antennas. Additionally, or alternatively, the transmitter 1315 may support outputting information by transmitting signals via one or more wired (e.g., electrical, fiber optic) interfaces, wireless interfaces, or any combination thereof.
  • the transmitter 1315 and the receiver 1310 may be co-located in a transceiver, which may include or be coupled with a modem.
  • the device 1305, or various components thereof may be an example of means for performing various aspects of signaling for lower layer triggered mobility handovers as described herein.
  • the communications manager 1320 may include a control signaling transmitter 1325, a candidate cell selection receiver 1330, a cell switch command transmitter 1335, or any combination thereof.
  • the communications manager 1320 may be an example of aspects of a communications manager 1220 as described herein.
  • the communications manager 1320, or various components thereof may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 1310, the transmitter 1315, or both.
  • the communications manager 1320 may receive information from the receiver 1310, send information to the transmitter 1315, or be integrated in combination with the receiver 1310, the transmitter 1315, or both to obtain information, output information, or perform various other operations as described herein.
  • the communications manager 1320 may support wireless communications in accordance with examples as disclosed herein.
  • the control signaling transmitter 1325 is capable of, configured to, or operable to support a means for transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the candidate cell selection receiver 1330 is capable of, configured to, or operable to support a means for receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the timing advance values from the set of candidate cells.
  • the cell switch command transmitter 1335 is capable of, configured to, or operable to support a means for transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on the indication of the selected candidate cell.
  • the communications manager 1320 may support wireless communications in accordance with examples as disclosed herein.
  • the control signaling transmitter 1325 is capable of, configured to, or operable to support a means for transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the candidate cell selection receiver 1330 is capable of, configured to, or operable to support a means for receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells.
  • the cell switch command transmitter 1335 is capable of, configured to, or operable to support a means for transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on the indication of the selected candidate cell.
  • the communications manager 1320 may support wireless communications in accordance with examples as disclosed herein.
  • the control signaling transmitter 1325 is capable of, configured to, or operable to support a means for transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the candidate cell selection receiver 1330 is capable of, configured to, or operable to support a means for receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the beamforming parameters.
  • the cell switch command transmitter 1335 is capable of, configured to, or operable to support a means for transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on selecting the candidate cell.
  • FIG. 14 shows a block diagram 1400 of a communications manager 1420 that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • the communications manager 1420 may be an example of aspects of a communications manager 1220, a communications manager 1320, or both, as described herein.
  • the communications manager 1420, or various components thereof, may be an example of means for performing various aspects of signaling for lower layer triggered mobility handovers as described herein.
  • the communications manager 1420 may include a control signaling transmitter 1425, a candidate cell selection receiver 1430, a cell switch command transmitter 1435, a timing advance value storage indication manager 1440, a beam report receiver 1445, or any combination thereof.
  • Each of these components, or components or subcomponents thereof may communicate, directly or indirectly, with one another (e.g., via one or more buses) which may include communications within a protocol layer of a protocol stack, communications associated with a logical channel of a protocol stack (e.g., between protocol layers of a protocol stack, within a device, component, or virtualized component associated with a network entity 105, between devices, components, or virtualized components associated with a network entity 105) , or any combination thereof.
  • the communications manager 1420 may support wireless communications in accordance with examples as disclosed herein.
  • the control signaling transmitter 1425 is capable of, configured to, or operable to support a means for transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the candidate cell selection receiver 1430 is capable of, configured to, or operable to support a means for receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the timing advance values from the set of candidate cells.
  • the cell switch command transmitter 1435 is capable of, configured to, or operable to support a means for transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on the indication of the selected candidate cell.
  • control signaling transmitter 1425 is capable of, configured to, or operable to support a means for transmitting, via the control signaling, an indication of whether the UE acquires a timing advance value of the candidate cell before receiving the cell switch command by UE-measurements of reference signals, by random access procedures, or both, where the indication of the selection of the candidate cell is based on receiving the indication.
  • control signaling transmitter 1425 is capable of, configured to, or operable to support a means for transmitting, via the control signaling, an indication that the timing advance values are based on a reception time difference between the serving cell and a respective candidate cell and a timing advance value for the serving cell, where the indication of the selection of the candidate cell is based on receiving the indication.
  • control signaling transmitter 1425 is capable of, configured to, or operable to support a means for transmitting, via the control signaling, an indication of resources for performing a random access procedure with the set of candidate cells to acquire the timing advance values of the set of candidate cells, where the indication of the selection of the candidate cell is based on receiving the indication.
  • control signaling includes downlink control information and includes an identifier of the candidate cell.
  • control signaling transmitter 1425 is capable of, configured to, or operable to support a means for transmitting, via the control signaling, an indication of whether the serving cell, the candidate cells from the set of candidate cells, or both, are to transmit a random access response in response to a random access preamble from the UE as part of acquiring the timing advance values using the random access procedure.
  • the cell switch command includes a timing advance value for a respective candidate cell in response to the control signaling indicating that the serving cell and the set of candidate cells are to refrain from transmitting the random access response.
  • the timing advance value storage indication manager 1440 is capable of, configured to, or operable to support a means for receiving, from the UE, an indication of a maximum quantity of timing advance values for different cells that the UE is capable of storing, where transmitting the control signaling is based on receiving the indication.
  • the communications manager 1420 may support wireless communications in accordance with examples as disclosed herein.
  • the control signaling transmitter 1425 is capable of, configured to, or operable to support a means for transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the candidate cell selection receiver 1430 is capable of, configured to, or operable to support a means for receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells.
  • the cell switch command transmitter 1435 is capable of, configured to, or operable to support a means for transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on the indication of the selected candidate cell.
  • control signaling transmitter 1425 is capable of, configured to, or operable to support a means for transmitting, via the control signaling, parameters used to measure the signal quality of the one or more reference signals of the set of reference signals, where the indication of the selection of the candidate cell is based on the signal quality measurements.
  • the parameters include a physical cell identifier for the candidate cell, a logical identifier of the candidate cell, an indication of time domain resources associated with the one or more reference signals, a periodicity of the one or more reference signals, a subframe offset, a center frequency of the one or more reference signals, a subcarrier spacing of the one or more reference signals, or any combination thereof.
  • the parameters include an indication of whether the UE is capable of measuring a set of multiple reference signals concurrently, an indication associated with a measurement gap, a quantity of measurement gaps, a minimum size of the measurement gap, a maximum size of the measurement gap, and indication of whether the set of reference signals are outside of a bandwidth part, or any combination thereof.
  • a frequency band of the one or more reference signals is the same as a frequency band being used by the candidate cell and the signal quality measurements are intra-frequency measurements.
  • a frequency band of the one or more reference signals is different than a frequency band being used by the candidate cell and the signal quality measurements are inter-frequency measurements.
  • control signaling transmitter 1425 is capable of, configured to, or operable to support a means for transmitting, via the control signaling, an indication of a maximum quantity of reference signals to be measured from the set of reference signals from the set of candidate cells.
  • control signaling transmitter 1425 is capable of, configured to, or operable to support a means for transmitting, via the control signaling, parameters associated with the UE transmitting a beam report for selecting beams from a set of beams of one or more candidate cells of the set of candidate cells.
  • cell switch command transmitter 1435 is capable of, configured to, or operable to support a means for transmitting, via the cell switch command, an indication of one or more beams from the set of beams, the one or more beams being associated with the selected candidate cell.
  • the beam report receiver 1445 is capable of, configured to, or operable to support a means for receiving, from the UE, the beam report indicating a quantity of beams from the set of beams for a quantity of candidate cells from the set of candidate cells.
  • the cell switch command transmitter 1435 is capable of, configured to, or operable to support a means for transmitting, via the cell switch command, an indication of one or more beams from the set of beams associated with the selected candidate cell indicated based as least in part on receiving the beam report.
  • the set of reference signals include synchronization signal blocks.
  • the communications manager 1420 may support wireless communications in accordance with examples as disclosed herein.
  • the control signaling transmitter 1425 is capable of, configured to, or operable to support a means for transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the candidate cell selection receiver 1430 is capable of, configured to, or operable to support a means for receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the beamforming parameters.
  • the cell switch command transmitter 1435 is capable of, configured to, or operable to support a means for transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on selecting the candidate cell.
  • control signaling transmitter 1425 is capable of, configured to, or operable to support a means for transmitting, via the control signaling, an indication of one or more parameters associated with the lower layer mobility triggered handover procedure, where the indication of the selection of the candidate cell is based on the one or more parameters.
  • the one or more parameters include information to identify a target candidate cell from the set of candidate cells, timing advance information, an indication of a joint or pair of beamforming parameters for the target candidate cell, an indication of set of active downlink bandwidth parts and a set of active uplink bandwidth parts, a set of triggers for receiving reference signals from the target candidate cell, a set of triggers for transmitting a beam management report to the target candidate cell, a trigger for transmitting a channel state information report, a trigger for initiating a contention-based random access procedure, an indication of a network identifier of the target candidate cell, or any combination thereof.
  • the cell switch command transmitter 1435 is capable of, configured to, or operable to support a means for transmitting, via the cell switch command, an indication of an activation of the beamforming parameters based on receiving the control signaling, where the UE is to connect with the selected candidate cell based on the activation of the beamforming parameters.
  • the cell switch command transmitter 1435 is capable of, configured to, or operable to support a means for transmitting, prior to transmitting the cell switch command, an indication of an activation of the beamforming parameters based on receiving the control signaling where the UE is to connect with the selected candidate cell based on the activation of the beamforming parameters.
  • control signaling transmitter 1425 is capable of, configured to, or operable to support a means for transmitting, via the control signaling, a beam indication for a subset of candidate cells within the set of candidate cells and an activation of a beam included in the beam indication for the candidate cell, where the indication of the selection of the candidate cell is based on the beam indication.
  • the beam indication includes a maximum quantity of activated beamforming parameters per candidate cell of the set of candidate cells, a maximum quantity of activated beamforming parameters for the set of candidate cells across a set of carrier components, a maximum quantity of activated beamforming parameters for the serving cell and the set of candidate cells, a beamforming parameter type per candidate cell of set of candidate cells, a maximum quantity of configured beamforming parameters per candidate cell of the set of candidate cells, a maximum quantity of configured beamforming parameters across the set of candidate cells, a maximum quantity of component carrier lists for the beam indication, a maximum quantity of configured candidate cells for beamforming parameter activation, or any combination thereof.
  • control signaling transmitter 1425 is capable of, configured to, or operable to support a means for transmitting, via the control signaling, an indication for the UE to synchronize downlink signaling with one or more candidate cells from the set of candidate cells, where the indication of the selection of the candidate cell is based on the UE being synchronized with the one or more candidate cells.
  • control signaling transmitter 1425 is capable of, configured to, or operable to support a means for transmitting, via the control signaling, an indication of a set of beam application times associated with one or more candidate cells from the set of candidate cells, where a respective beam application time of a respective candidate cell is the same as a second beam application time associated with the serving cell or is different from the second beam application time, and where the indication of the selection of the candidate cell is based on the set of beam application times.
  • FIG. 15 shows a diagram of a system 1500 including a device 1505 that supports signaling for lower layer triggered mobility handovers in accordance with one or more aspects of the present disclosure.
  • the device 1505 may be an example of or include the components of a device 1205, a device 1305, or a network entity 105 as described herein.
  • the device 1505 may communicate with one or more network entities 105, one or more UEs 115, or any combination thereof, which may include communications over one or more wired interfaces, over one or more wireless interfaces, or any combination thereof.
  • the device 1505 may include components that support outputting and obtaining communications, such as a communications manager 1520, a transceiver 1510, an antenna 1515, at least one memory 1525, code 1530, and at least one processor 1535. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 1540) .
  • a communications manager 1520 e.g., operatively, communicatively, functionally, electronically, electrically
  • buses e.g., a bus 1540
  • the transceiver 1510 may support bi-directional communications via wired links, wireless links, or both as described herein.
  • the transceiver 1510 may include a wired transceiver and may communicate bi-directionally with another wired transceiver. Additionally, or alternatively, in some examples, the transceiver 1510 may include a wireless transceiver and may communicate bi- directionally with another wireless transceiver.
  • the device 1505 may include one or more antennas 1515, which may be capable of transmitting or receiving wireless transmissions (e.g., concurrently) .
  • the transceiver 1510 may also include a modem to modulate signals, to provide the modulated signals for transmission (e.g., by one or more antennas 1515, by a wired transmitter) , to receive modulated signals (e.g., from one or more antennas 1515, from a wired receiver) , and to demodulate signals.
  • the transceiver 1510 may include one or more interfaces, such as one or more interfaces coupled with the one or more antennas 1515 that are configured to support various receiving or obtaining operations, or one or more interfaces coupled with the one or more antennas 1515 that are configured to support various transmitting or outputting operations, or a combination thereof.
  • the transceiver 1510 may include or be configured for coupling with one or more processors or one or more memory components that are operable to perform or support operations based on received or obtained information or signals, or to generate information or other signals for transmission or other outputting, or any combination thereof.
  • the transceiver 1510, or the transceiver 1510 and the one or more antennas 1515, or the transceiver 1510 and the one or more antennas 1515 and one or more processors or one or more memory components may be included in a chip or chip assembly that is installed in the device 1505.
  • the transceiver 1510 may be operable to support communications via one or more communications links (e.g., a communication link 125, a backhaul communication link 120, a midhaul communication link 162, a fronthaul communication link 168) .
  • a communications link 125 e.g., a communication link 125, a backhaul communication link 120, a midhaul communication link 162, a fronthaul communication link 168 .
  • the at least one memory 1525 may include RAM, ROM, or any combination thereof.
  • the at least one memory 1525 may store computer-readable, computer-executable code 1530 including instructions that, when executed by one or more of the at least one processor 1535, cause the device 1505 to perform various functions described herein.
  • the code 1530 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory.
  • the code 1530 may not be directly executable by a processor of the at least one processor 1535 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • the at least one memory 1525 may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • the at least one processor 1535 may include multiple processors and the at least one memory 1525 may include multiple memories.
  • One or more of the multiple processors may be coupled with one or more of the multiple memories which may, individually or collectively, be configured to perform various functions herein (for example, as part of a processing system) .
  • the at least one processor 1535 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA, a microcontroller, a programmable logic device, discrete gate or transistor logic, a discrete hardware component, or any combination thereof) .
  • the at least one processor 1535 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into one or more of the at least one processor 1535.
  • the at least one processor 1535 may be configured to execute computer-readable instructions stored in a memory (e.g., one or more of the at least one memory 1525) to cause the device 1505 to perform various functions (e.g., functions or tasks supporting signaling for lower layer triggered mobility handovers) .
  • a memory e.g., one or more of the at least one memory 1525
  • the device 1505 or a component of the device 1505 may include at least one processor 1535 and at least one memory 1525 coupled with one or more of the at least one processor 1535, the at least one processor 1535 and the at least one memory 1525 configured to perform various functions described herein.
  • the at least one processor 1535 may be an example of a cloud-computing platform (e.g., one or more physical nodes and supporting software such as operating systems, virtual machines, or container instances) that may host the functions (e.g., by executing code 1530) to perform the functions of the device 1505.
  • the at least one processor 1535 may be any one or more suitable processors capable of executing scripts or instructions of one or more software programs stored in the device 1505 (such as within one or more of the at least one memory 1525) .
  • the at least one processor 1535 may be a component of a processing system.
  • a processing system may generally refer to a system or series of machines or components that receives inputs and processes the inputs to produce a set of outputs (which may be passed to other systems or components of, for example, the device 1505) .
  • a processing system of the device 1505 may refer to a system including the various other components or subcomponents of the device 1505, such as the at least one processor 1535, or the transceiver 1510, or the communications manager 1520, or other components or combinations of components of the device 1505.
  • the processing system of the device 1505 may interface with other components of the device 1505, and may process information received from other components (such as inputs or signals) or output information to other components.
  • a chip or modem of the device 1505 may include a processing system and one or more interfaces to output information, or to obtain information, or both.
  • the one or more interfaces may be implemented as or otherwise include a first interface configured to output information and a second interface configured to obtain information, or a same interface configured to output information and to obtain information, among other implementations.
  • the one or more interfaces may refer to an interface between the processing system of the chip or modem and a transmitter, such that the device 1505 may transmit information output from the chip or modem.
  • the one or more interfaces may refer to an interface between the processing system of the chip or modem and a receiver, such that the device 1505 may obtain information or signal inputs, and the information may be passed to the processing system.
  • a first interface also may obtain information or signal inputs
  • a second interface also may output information or signal outputs.
  • a bus 1540 may support communications of (e.g., within) a protocol layer of a protocol stack. In some examples, a bus 1540 may support communications associated with a logical channel of a protocol stack (e.g., between protocol layers of a protocol stack) , which may include communications performed within a component of the device 1505, or between different components of the device 1505 that may be co-located or located in different locations (e.g., where the device 1505 may refer to a system in which one or more of the communications manager 1520, the transceiver 1510, the at least one memory 1525, the code 1530, and the at least one processor 1535 may be located in one of the different components or divided between different components) .
  • a logical channel of a protocol stack e.g., between protocol layers of a protocol stack
  • the device 1505 may refer to a system in which one or more of the communications manager 1520, the transceiver 1510, the at least one memory 1525, the code 1530, and the at least one
  • the communications manager 1520 may manage aspects of communications with a core network 130 (e.g., via one or more wired or wireless backhaul links) .
  • the communications manager 1520 may manage the transfer of data communications for client devices, such as one or more UEs 115.
  • the communications manager 1520 may manage communications with other network entities 105, and may include a controller or scheduler for controlling communications with UEs 115 in cooperation with other network entities 105.
  • the communications manager 1520 may support an X2 interface within an LTE/LTE-A wireless communications network technology to provide communication between network entities 105.
  • the communications manager 1520 may support wireless communications in accordance with examples as disclosed herein.
  • the communications manager 1520 is capable of, configured to, or operable to support a means for transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the communications manager 1520 is capable of, configured to, or operable to support a means for receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the timing advance values from the set of candidate cells.
  • the communications manager 1520 is capable of, configured to, or operable to support a means for transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on the indication of the selected candidate cell.
  • the communications manager 1520 may support wireless communications in accordance with examples as disclosed herein.
  • the communications manager 1520 is capable of, configured to, or operable to support a means for transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the communications manager 1520 is capable of, configured to, or operable to support a means for receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells.
  • the communications manager 1520 is capable of, configured to, or operable to support a means for transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on the indication of the selected candidate cell.
  • the communications manager 1520 may support wireless communications in accordance with examples as disclosed herein.
  • the communications manager 1520 is capable of, configured to, or operable to support a means for transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the communications manager 1520 is capable of, configured to, or operable to support a means for receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the beamforming parameters.
  • the communications manager 1520 is capable of, configured to, or operable to support a means for transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on selecting the candidate cell.
  • the device 1505 may support techniques for a UE 115 to receive control signaling for a lower layered mobility handover procedure for improved communication reliability, reduced latency, improved user experience related to reduced processing, reduced power consumption, more efficient utilization of communication resources, improved coordination between devices, longer battery life, and improved utilization of processing capability.
  • the communications manager 1520 may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the transceiver 1510, the one or more antennas 1515 (e.g., where applicable) , or any combination thereof.
  • the communications manager 1520 is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager 1520 may be supported by or performed by the transceiver 1510, one or more of the at least one processor 1535, one or more of the at least one memory 1525, the code 1530, or any combination thereof (for example, by a processing system including at least a portion of the at least one processor 1535, the at least one memory 1525, the code 1530, or any combination thereof) .
  • the code 1530 may include instructions executable by one or more of the at least one processor 1535 to cause the device 1505 to perform various aspects of signaling for lower layer triggered mobility handovers as described herein, or the at least one processor 1535 and the at least one memory 1525 may be otherwise configured to, individually or collectively, perform or support such operations.
  • FIG. 16 shows a flowchart illustrating a method 1600 that supports signaling for lower layer triggered mobility handovers in accordance with aspects of the present disclosure.
  • the operations of the method 1600 may be implemented by a UE or its components as described herein.
  • the operations of the method 1600 may be performed by a UE 115 as described with reference to FIGs. 1 through 11.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
  • the method may include receiving, from a serving cell connected with the UE, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the operations of block 1605 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1605 may be performed by a control signaling receiver 1025 as described with reference to FIG. 10.
  • the method may include selecting, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the timing advance values from the set of candidate cells.
  • the operations of block 1610 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1610 may be performed by a candidate cell selection component 1030 as described with reference to FIG. 10.
  • the method may include receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the operations of block 1615 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1615 may be performed by a cell switch command receiver 1035 as described with reference to FIG. 10.
  • FIG. 17 shows a flowchart illustrating a method 1700 that supports signaling for lower layer triggered mobility handovers in accordance with aspects of the present disclosure.
  • the operations of the method 1700 may be implemented by a UE or its components as described herein.
  • the operations of the method 1700 may be performed by a UE 115 as described with reference to FIGs. 1 through 11.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
  • the method may include receiving, from a serving cell connected with the UE, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the operations of block 1705 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1705 may be performed by a control signaling receiver 1025 as described with reference to FIG. 10.
  • the method may include measuring a reception time difference between a first reception time of a first signal received from the serving cell and a second reception time of a second signal from the candidate cell.
  • the operations of block 1710 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1710 may be performed by a reception time measurement component 1040 as described with reference to FIG. 10.
  • the method may include determining a timing advance value of the candidate cell based on a second timing advance value of the serving cell and the reception time difference, where selecting the candidate cell is based on determining the timing advance value of the candidate cell.
  • the operations of block 1715 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1715 may be performed by a timing advance value component 1045 as described with reference to FIG. 10.
  • the method may include selecting, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the timing advance values from the set of candidate cells.
  • the operations of block 1720 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1720 may be performed by a candidate cell selection component 1030 as described with reference to FIG. 10.
  • the method may include receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the operations of block 1725 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1725 may be performed by a cell switch command receiver 1035 as described with reference to FIG. 10.
  • FIG. 18 shows a flowchart illustrating a method 1800 that supports signaling for lower layer triggered mobility handovers in accordance with aspects of the present disclosure.
  • the operations of the method 1800 may be implemented by a UE or its components as described herein.
  • the operations of the method 1800 may be performed by a UE 115 as described with reference to FIGs. 1 through 11.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
  • the method may include receiving, from a serving cell connected with the UE, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the operations of block 1805 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1805 may be performed by a control signaling receiver 1025 as described with reference to FIG. 10.
  • the method may include receiving, via the control signaling, an indication of resources for performing a random access procedure with the set of candidate cells to acquire the timing advance values of the set of candidate cells, where selecting the candidate cell is based on receiving the indication.
  • the operations of block 1810 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1810 may be performed by a control signaling receiver 1025 as described with reference to FIG. 10.
  • the method may include selecting, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the timing advance values from the set of candidate cells.
  • the operations of block 1815 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1815 may be performed by a candidate cell selection component 1030 as described with reference to FIG. 10.
  • the method may include receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the operations of block 1820 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1820 may be performed by a cell switch command receiver 1035 as described with reference to FIG. 10.
  • FIG. 19 shows a flowchart illustrating a method 1900 that supports signaling for lower layer triggered mobility handovers in accordance with aspects of the present disclosure.
  • the operations of the method 1900 may be implemented by a UE or its components as described herein.
  • the operations of the method 1900 may be performed by a UE 115 as described with reference to FIGs. 1 through 11.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
  • the method may include receiving, from a serving cell connected with the UE, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the operations of block 1905 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1905 may be performed by a control signaling receiver 1025 as described with reference to FIG. 10.
  • the method may include selecting, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells.
  • the operations of block 1910 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1910 may be performed by a candidate cell selection component 1030 as described with reference to FIG. 10.
  • the method may include receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the operations of block 1915 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1915 may be performed by a cell switch command receiver 1035 as described with reference to FIG. 10.
  • FIG. 20 shows a flowchart illustrating a method 2000 that supports signaling for lower layer triggered mobility handovers in accordance with aspects of the present disclosure.
  • the operations of the method 2000 may be implemented by a UE or its components as described herein.
  • the operations of the method 2000 may be performed by a UE 115 as described with reference to FIGs. 1 through 11.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
  • the method may include receiving, from a serving cell connected with the UE, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the operations of block 2005 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2005 may be performed by a control signaling receiver 1025 as described with reference to FIG. 10.
  • the method may include receiving the set of reference signals from the set of candidate cells.
  • the operations of block 2010 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2010 may be performed by a reference signal receiver 1055 as described with reference to FIG. 10.
  • the method may include measuring the signal quality of one or more references signals of the set of reference signals based on receiving the set of reference signals, where selecting the candidate cell from the set of candidate cells is based on the signal quality of the one or more reference signals of the set of reference signals.
  • the operations of block 2015 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2015 may be performed by a reference signal measurement component 1060 as described with reference to FIG. 10.
  • the method may include selecting, based on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells.
  • the operations of block 2020 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2020 may be performed by a candidate cell selection component 1030 as described with reference to FIG. 10.
  • the method may include receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the operations of block 2025 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2025 may be performed by a cell switch command receiver 1035 as described with reference to FIG. 10.
  • FIG. 21 shows a flowchart illustrating a method 2100 that supports signaling for lower layer triggered mobility handovers in accordance with aspects of the present disclosure.
  • the operations of the method 2100 may be implemented by a UE or its components as described herein.
  • the operations of the method 2100 may be performed by a UE 115 as described with reference to FIGs. 1 through 11.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
  • the method may include receiving, from a serving cell connected with the UE, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the operations of block 2105 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2105 may be performed by a control signaling receiver 1025 as described with reference to FIG. 10.
  • the method may include selecting a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the beamforming parameters.
  • the operations of block 2110 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2110 may be performed by a candidate cell selection component 1030 as described with reference to FIG. 10.
  • the method may include receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the operations of block 2115 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2115 may be performed by a cell switch command receiver 1035 as described with reference to FIG. 10.
  • FIG. 22 shows a flowchart illustrating a method 2200 that supports signaling for lower layer triggered mobility handovers in accordance with aspects of the present disclosure.
  • the operations of the method 2200 may be implemented by a UE or its components as described herein.
  • the operations of the method 2200 may be performed by a UE 115 as described with reference to FIGs. 1 through 11.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
  • the method may include receiving, from a serving cell connected with the UE, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the operations of block 2205 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2205 may be performed by a control signaling receiver 1025 as described with reference to FIG. 10.
  • the method may include selecting a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the beamforming parameters.
  • the operations of block 2210 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2210 may be performed by a candidate cell selection component 1030 as described with reference to FIG. 10.
  • the method may include receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the operations of block 2215 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2215 may be performed by a cell switch command receiver 1035 as described with reference to FIG. 10.
  • the method may include receiving, via the cell switch command, an indication of an activation of the beamforming parameters based on receiving the control signaling, where the UE connects with the selected candidate cell based on the activation of the beamforming parameters.
  • the operations of block 2220 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2220 may be performed by a cell switch command receiver 1035 as described with reference to FIG. 10.
  • FIG. 23 shows a flowchart illustrating a method 2300 that supports signaling for lower layer triggered mobility handovers in accordance with aspects of the present disclosure.
  • the operations of the method 2300 may be implemented by a UE or its components as described herein.
  • the operations of the method 2300 may be performed by a UE 115 as described with reference to FIGs. 1 through 11.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.
  • the method may include receiving, from a serving cell connected with the UE, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the operations of block 2305 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2305 may be performed by a control signaling receiver 1025 as described with reference to FIG. 10.
  • the method may include selecting a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the beamforming parameters.
  • the operations of block 2310 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2310 may be performed by a candidate cell selection component 1030 as described with reference to FIG. 10.
  • the method may include receiving, prior to receiving the cell switch command, an indication of an activation of the beamforming parameters based on receiving the control signaling where the UE connects with the selected candidate cell based on the activation of the beamforming parameters.
  • the operations of block 2315 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2315 may be performed by a cell switch command receiver 1035 as described with reference to FIG. 10.
  • the method may include receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based on selecting the candidate cell.
  • the operations of block 2320 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2320 may be performed by a cell switch command receiver 1035 as described with reference to FIG. 10.
  • FIG. 24 shows a flowchart illustrating a method 2400 that supports signaling for lower layer triggered mobility handovers in accordance with aspects of the present disclosure.
  • the operations of the method 2400 may be implemented by a network entity or its components as described herein.
  • the operations of the method 2400 may be performed by a network entity as described with reference to FIGs. 1 through 7 and 12 through 15.
  • a network entity may execute a set of instructions to control the functional elements of the network entity to perform the described functions. Additionally, or alternatively, the network entity may perform aspects of the described functions using special-purpose hardware.
  • the method may include transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the operations of block 2405 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2405 may be performed by a control signaling transmitter 1425 as described with reference to FIG. 14.
  • the method may include receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the timing advance values from the set of candidate cells.
  • the operations of block 2410 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2410 may be performed by a candidate cell selection receiver 1430 as described with reference to FIG. 14.
  • the method may include transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on the indication of the selected candidate cell.
  • the operations of block 2415 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2415 may be performed by a cell switch command transmitter 1435 as described with reference to FIG. 14.
  • FIG. 25 shows a flowchart illustrating a method 2500 that supports signaling for lower layer triggered mobility handovers in accordance with aspects of the present disclosure.
  • the operations of the method 2500 may be implemented by a network entity or its components as described herein.
  • the operations of the method 2500 may be performed by a network entity as described with reference to FIGs. 1 through 7 and 12 through 15.
  • a network entity may execute a set of instructions to control the functional elements of the network entity to perform the described functions. Additionally, or alternatively, the network entity may perform aspects of the described functions using special-purpose hardware.
  • the method may include transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the method may include receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells.
  • the operations of block 2510 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2510 may be performed by a candidate cell selection receiver 1430 as described with reference to FIG. 14.
  • the method may include transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on the indication of the selected candidate cell.
  • the operations of block 2515 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2515 may be performed by a cell switch command transmitter 1435 as described with reference to FIG. 14.
  • FIG. 26 shows a flowchart illustrating a method 2600 that supports signaling for lower layer triggered mobility handovers in accordance with aspects of the present disclosure.
  • the operations of the method 2600 may be implemented by a network entity or its components as described herein.
  • the operations of the method 2600 may be performed by a network entity as described with reference to FIGs. 1 through 7 and 12 through 15.
  • a network entity may execute a set of instructions to control the functional elements of the network entity to perform the described functions. Additionally, or alternatively, the network entity may perform aspects of the described functions using special-purpose hardware.
  • the method may include transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure.
  • the operations of block 2605 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2605 may be performed by a control signaling transmitter 1425 as described with reference to FIG. 14.
  • the method may include receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based on the beamforming parameters.
  • the operations of block 2610 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2610 may be performed by a candidate cell selection receiver 1430 as described with reference to FIG. 14.
  • the method may include transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based on selecting the candidate cell.
  • the operations of block 2615 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 2615 may be performed by a cell switch command transmitter 1435 as described with reference to FIG. 14.
  • a method for wireless communications by a UE comprising: receiving, from a serving cell connected with the UE, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure; selecting, based at least in part on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based at least in part on the timing advance values from the set of candidate cells; and receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based at least in part on selecting the candidate cell.
  • Aspect 2 The method of aspect 1, further comprising: receiving, via the control signaling, an indication of whether the UE acquires a timing advance value of the candidate cell before receiving the cell switch command by UE-measurements of reference signals, by random access procedures, or both, wherein selecting the candidate cell is based at least in part on receiving the indication.
  • Aspect 3 The method of any of aspects 1 through 2, further comprising: receiving, via the control signaling, an indication that the timing advance values are based at least in part on a reception time difference between the serving cell and a respective candidate cell and a timing advance value for the serving cell, wherein selecting the candidate cell is based at least in part on receiving the indication.
  • Aspect 4 The method of any of aspects 1 through 3, further comprising: measuring a reception time difference between a first reception time of a first signal received from the serving cell and a second reception time of a second signal from the candidate cell; and determining a timing advance value of the candidate cell based at least in part on a second timing advance value of the serving cell and the reception time difference, wherein selecting the candidate cell is based at least in part on determining the timing advance value of the candidate cell.
  • Aspect 5 The method of any of aspects 1 through 4, further comprising: receiving, via the control signaling, an indication of resources for performing a random access procedure with the set of candidate cells to acquire the timing advance values of the set of candidate cells, wherein selecting the candidate cell is based at least in part on receiving the indication.
  • Aspect 6 The method of aspect 5, wherein the control signaling comprises downlink control information and includes an identifier of the candidate cell.
  • Aspect 7 The method of any of aspects 5 through 6, further comprising: receiving a synchronization signal block from a respective candidate cell via the resources included in the indication; and determining a timing advance value of the respective candidate cell based at least in part on receiving the synchronization signal block from the respective candidate cell, wherein selecting the candidate cell is based at least in part on determining the timing advance value of the respective candidate cell.
  • Aspect 8 The method of any of aspects 5 through 7, wherein receiving the control signaling further comprises: receiving, via the control signaling, an indication of whether the serving cell, the candidate cells from the set of candidate cells, or both, are to transmit a random access response in response to a random access preamble from the UE as part of acquiring the timing advance values using the random access procedure.
  • Aspect 9 The method of aspect 8, wherein the cell switch command includes a timing advance value for a respective candidate cell in response to the control signaling indicating that the serving cell and the set of candidate cells are to refrain from transmitting the random access response.
  • Aspect 10 The method of any of aspects 1 through 9, further comprising: transmitting, to the serving cell, an indication of a maximum quantity of timing advance values for different cells that the UE is capable of storing, wherein receiving the control signaling is based at least in part on transmitting the indication.
  • a method for wireless communications by a UE comprising: receiving, from a serving cell connected with the UE, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure; selecting, based at least in part on the control signaling, a candidate cell from the set of candidate cells while the UE is connected with the serving cell based at least in part on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells; and receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based at least in part on selecting the candidate cell.
  • Aspect 12 The method of aspect 11, further comprising: receiving the set of reference signals from the set of candidate cells; and measuring the signal quality of one or more references signals of the set of reference signals based at least in part on receiving the set of reference signals, wherein selecting the candidate cell from the set of candidate cells is based at least in part on the signal quality of the one or more reference signals of the set of reference signals.
  • Aspect 13 The method of any of aspects 11 through 12, further comprising: receiving, via the control signaling, parameters used to measure the signal quality of the one or more reference signals of the set of reference signals, wherein selecting the candidate cell is based at least in part on the signal quality measurements.
  • Aspect 14 The method of aspect 13, wherein the parameters comprise a physical cell identifier for the candidate cell, a logical identifier of the candidate cell, an indication of time domain resources associated with the one or more reference signals, a periodicity of the one or more reference signals, a subframe offset, a center frequency of the one or more reference signals, a subcarrier spacing of the one or more reference signals, or any combination thereof.
  • Aspect 15 The method of aspect 14, wherein the parameters comprise an indication of whether the UE is capable of measuring a plurality of reference signals concurrently, an indication associated with a measurement gap, a quantity of measurement gaps, a minimum size of the measurement gap, a maximum size of the measurement gap, and indication of whether the set of reference signals are outside of a bandwidth part, or any combination thereof.
  • Aspect 16 The method of any of aspects 11 through 15, wherein a frequency band of the one or more reference signals is the same as a frequency band being used by the candidate cell and the signal quality measurements are intra-frequency measurements.
  • Aspect 17 The method of any of aspects 11 through 16, wherein a frequency band of the one or more reference signals is different than a frequency band being used by the candidate cell and the signal quality measurements are inter-frequency measurements.
  • Aspect 18 The method of any of aspects 11 through 17, further comprising: receiving, via the control signaling, an indication of a maximum quantity of reference signals to be measured from the set of reference signals from the set of candidate cells.
  • Aspect 19 The method of any of aspects 11 through 18, further comprising: receiving, via the control signaling, parameters associated with transmitting a beam report for selecting beams from a set of beams of one or more candidate cells of the set of candidate cells; and receiving, via the cell switch command, an indication of one or more beams from the set of beams, the one or more beams being associated with the selected candidate cell.
  • Aspect 20 The method of aspect 19, further comprising: transmitting, to the serving cell, the beam report indicating a quantity of beams from the set of beams for a quantity of candidate cells from the set of candidate cells; and receiving, via the cell switch command, an indication of one or more beams from the set of beams associated with the selected candidate cell indicated based as least in part on transmitting the beam report.
  • Aspect 21 The method of any of aspects 11 through 20, wherein the set of reference signals comprise synchronization signal blocks.
  • a method for wireless communications by a UE comprising: receiving, from a serving cell connected with the UE, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure; selecting a candidate cell from the set of candidate cells while the UE is connected with the serving cell based at least in part on the beamforming parameters; and receiving, from the serving cell, a cell switch command to connect with the selected candidate cell based at least in part on selecting the candidate cell.
  • Aspect 23 The method of aspect 22, further comprising: receiving, via the control signaling, an indication of one or more parameters associated with the lower layer mobility triggered handover procedure, wherein selecting the candidate cell is based at least in part on the one or more parameters.
  • Aspect 24 The method of aspect 23, wherein the one or more parameters comprise information to identify a target candidate cell from the set of candidate cells, timing advance information, an indication of a joint or pair of beamforming parameters for the target candidate cell, an indication of set of active downlink bandwidth parts and a set of active uplink bandwidth parts, a set of triggers for receiving reference signals from the target candidate cell, a set of triggers for transmitting a beam management report to the target candidate cell, a trigger for transmitting a channel state information report, a trigger for initiating a contention-based random access procedure, an indication of a network identifier of the target candidate cell, or any combination thereof.
  • Aspect 25 The method of any of aspects 22 through 24, further comprising: receiving, via the cell switch command, an indication of an activation of the beamforming parameters based at least in part on receiving the control signaling, wherein the UE connects with the selected candidate cell based at least in part on the activation of the beamforming parameters.
  • Aspect 26 The method of any of aspects 22 through 25, further comprising: receiving, prior to receiving the cell switch command, an indication of an activation of the beamforming parameters based at least in part on receiving the control signaling wherein the UE connects with the selected candidate cell based at least in part on the activation of the beamforming parameters.
  • Aspect 27 The method of any of aspects 22 through 26, further comprising: receiving, via the control signaling, a beam indication for a subset of candidate cells within the set of candidate cells and an activation of a beam included in the beam indication for the candidate cell, wherein selecting of the candidate cell is based at least in part on the beam indication.
  • Aspect 28 The method of aspect 27, wherein the beam indication comprises a maximum quantity of activated beamforming parameters per candidate cell of the set of candidate cells, a maximum quantity of activated beamforming parameters for the set of candidate cells across a set of carrier components, a maximum quantity of activated beamforming parameters for the serving cell and the set of candidate cells, a beamforming parameter type per candidate cell of set of candidate cells, a maximum quantity of configured beamforming parameters per candidate cell of the set of candidate cells, a maximum quantity of configured beamforming parameters across the set of candidate cells, a maximum quantity of component carrier lists for the beam indication, a maximum quantity of configured candidate cells for beamforming parameter activation, or any combination thereof.
  • Aspect 29 The method of any of aspects 22 through 28, further comprising: receiving, via the control signaling, an indication for the UE to synchronize downlink signaling with one or more candidate cells from the set of candidate cells, wherein the candidate cell is selected from the one or more candidate cells based at least in part on the UE being synchronized with the one or more candidate cells.
  • Aspect 30 The method of any of aspects 22 through 29, further comprising: receiving, from the set of candidate cells, a set of reference signals for synchronization with the set of candidate cells, wherein the set of reference signals are received prior to the cell switch command; synchronizing with one or more candidate cells of the set of candidate cells based at least in part on receiving the set of reference signals from the one or more candidate cells; and selecting the candidate cell from the one or more candidate cells based at least in part on the UE being synchronized with the candidate cell.
  • Aspect 31 The method of any of aspects 22 through 30, further comprising: receiving, via the control signaling, an indication of a set of beam application times associated with one or more candidate cells from the set of candidate cells, wherein a respective beam application time of a respective candidate cell is the same as a second beam application time associated with the serving cell or is different from the second beam application time, and wherein selecting the candidate cell is based at least in part on the set of beam application times.
  • a method for wireless communications by a network entity comprising: transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information for acquiring timing advance values from a set of candidate cells for a lower layer mobility triggered handover procedure; receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based at least in part on the timing advance values from the set of candidate cells; and transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based at least in part on the indication of the selected candidate cell.
  • Aspect 33 The method of aspect 32, further comprising: transmitting, via the control signaling, an indication of whether the UE acquires a timing advance value of the candidate cell before receiving the cell switch command by UE-measurements of reference signals, by random access procedures, or both, wherein the indication of the selection of the candidate cell is based at least in part on receiving the indication.
  • Aspect 34 The method of any of aspects 32 through 33, further comprising: transmitting, via the control signaling, an indication that the timing advance values are based at least in part on a reception time difference between the serving cell and a respective candidate cell and a timing advance value for the serving cell, wherein the indication of the selection of the candidate cell is based at least in part on receiving the indication.
  • Aspect 35 The method of any of aspects 32 through 34, further comprising: transmitting, via the control signaling, an indication of resources for performing a random access procedure with the set of candidate cells to acquire the timing advance values of the set of candidate cells, wherein the indication of the selection of the candidate cell is based at least in part on receiving the indication.
  • Aspect 36 The method of aspect 35, wherein the control signaling comprises downlink control information and includes an identifier of the candidate cell.
  • Aspect 37 The method of any of aspects 35 through 36, wherein receiving the control signaling further comprises: transmitting, via the control signaling, an indication of whether the serving cell, the candidate cells from the set of candidate cells, or both, are to transmit a random access response in response to a random access preamble from the UE as part of acquiring the timing advance values using the random access procedure.
  • Aspect 38 The method of aspect 37, wherein the cell switch command includes a timing advance value for a respective candidate cell in response to the control signaling indicating that the serving cell and the set of candidate cells are to refrain from transmitting the random access response.
  • Aspect 39 The method of any of aspects 32 through 38, further comprising: receiving, from the UE, an indication of a maximum quantity of timing advance values for different cells that the UE is capable of storing, wherein transmitting the control signaling is based at least in part on receiving the indication.
  • a method for wireless communications by a network entity comprising: transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information associated with measuring a signal quality of one or more reference signals of a set of reference signals from a set of candidate cells for a lower layer mobility triggered handover procedure; receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based at least in part on signal quality measurements of the one or more reference signals of the set of reference signals from the set of candidate cells; and transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based at least in part on the indication of the selected candidate cell.
  • Aspect 41 The method of aspect 40, further comprising: transmitting, via the control signaling, parameters used to measure the signal quality of the one or more reference signals of the set of reference signals, wherein the indication of the selection of the candidate cell is based at least in part on the signal quality measurements.
  • Aspect 42 The method of aspect 41, wherein the parameters comprise a physical cell identifier for the candidate cell, a logical identifier of the candidate cell, an indication of time domain resources associated with the one or more reference signals, a periodicity of the one or more reference signals, a subframe offset, a center frequency of the one or more reference signals, a subcarrier spacing of the one or more reference signals, or any combination thereof.
  • aspects 43 The method of aspect 42, wherein the parameters comprise an indication of whether the UE is capable of measuring a plurality of reference signals concurrently, an indication associated with a measurement gap, a quantity of measurement gaps, a minimum size of the measurement gap, a maximum size of the measurement gap, and indication of whether the set of reference signals are outside of a bandwidth part, or any combination thereof.
  • Aspect 44 The method of any of aspects 40 through 43, wherein a frequency band of the one or more reference signals is the same as a frequency band being used by the candidate cell and the signal quality measurements are intra-frequency measurements.
  • Aspect 45 The method of any of aspects 40 through 44, wherein a frequency band of the one or more reference signals is different than a frequency band being used by the candidate cell and the signal quality measurements are inter-frequency measurements.
  • Aspect 46 The method of any of aspects 40 through 45, further comprising: transmitting, via the control signaling, an indication of a maximum quantity of reference signals to be measured from the set of reference signals from the set of candidate cells.
  • Aspect 47 The method of any of aspects 40 through 46, further comprising: transmitting, via the control signaling, parameters associated with the UE transmitting a beam report for selecting beams from a set of beams of one or more candidate cells of the set of candidate cells; and transmitting, via the cell switch command, an indication of one or more beams from the set of beams, the one or more beams being associated with the selected candidate cell.
  • Aspect 48 The method of aspect 47, further comprising: receiving, from the UE, the beam report indicating a quantity of beams from the set of beams for a quantity of candidate cells from the set of candidate cells; and transmitting, via the cell switch command, an indication of one or more beams from the set of beams associated with the selected candidate cell indicated based as least in part on receiving the beam report.
  • Aspect 49 The method of any of aspects 40 through 48, wherein the set of reference signals comprise synchronization signal blocks.
  • a method for wireless communications by a network entity comprising: transmitting, to a UE connected with a serving cell of the network entity, control signaling indicating information associated with beamforming parameters for a set of candidate cells for a lower layer mobility triggered handover procedure; receiving, from the UE, an indication of a selection of a candidate cell from the set of candidate cells while the UE is connected with the serving cell based at least in part on the beamforming parameters; and transmitting, to the UE, a cell switch command for the UE to connect with the selected candidate cell based at least in part on selecting the candidate cell.
  • Aspect 51 The method of aspect 50, further comprising: transmitting, via the control signaling, an indication of one or more parameters associated with the lower layer mobility triggered handover procedure, wherein the indication of the selection of the candidate cell is based at least in part on the one or more parameters.
  • Aspect 52 The method of aspect 51, wherein the one or more parameters comprise information to identify a target candidate cell from the set of candidate cells, timing advance information, an indication of a joint or pair of beamforming parameters for the target candidate cell, an indication of set of active downlink bandwidth parts and a set of active uplink bandwidth parts, a set of triggers for receiving reference signals from the target candidate cell, a set of triggers for transmitting a beam management report to the target candidate cell, a trigger for transmitting a channel state information report, a trigger for initiating a contention-based random access procedure, an indication of a network identifier of the target candidate cell, or any combination thereof.
  • Aspect 53 The method of any of aspects 50 through 52, further comprising: transmitting, via the cell switch command, an indication of an activation of the beamforming parameters based at least in part on receiving the control signaling, wherein the UE is to connect with the selected candidate cell based at least in part on the activation of the beamforming parameters.
  • Aspect 54 The method of any of aspects 50 through 53, further comprising: transmitting, prior to transmitting the cell switch command, an indication of an activation of the beamforming parameters based at least in part on receiving the control signaling wherein the UE is to connect with the selected candidate cell based at least in part on the activation of the beamforming parameters.
  • Aspect 55 The method of any of aspects 50 through 54, further comprising: transmitting, via the control signaling, a beam indication for a subset of candidate cells within the set of candidate cells and an activation of a beam included in the beam indication for the candidate cell, wherein the indication of the selection of the candidate cell is based at least in part on the beam indication.
  • Aspect 56 The method of aspect 55, wherein the beam indication comprises a maximum quantity of activated beamforming parameters per candidate cell of the set of candidate cells, a maximum quantity of activated beamforming parameters for the set of candidate cells across a set of carrier components, a maximum quantity of activated beamforming parameters for the serving cell and the set of candidate cells, a beamforming parameter type per candidate cell of set of candidate cells, a maximum quantity of configured beamforming parameters per candidate cell of the set of candidate cells, a maximum quantity of configured beamforming parameters across the set of candidate cells, a maximum quantity of component carrier lists for the beam indication, a maximum quantity of configured candidate cells for beamforming parameter activation, or any combination thereof.
  • Aspect 57 The method of any of aspects 50 through 56, further comprising: transmitting, via the control signaling, an indication for the UE to synchronize downlink signaling with one or more candidate cells from the set of candidate cells, wherein the indication of the selection of the candidate cell is based at least in part on the UE being synchronized with the one or more candidate cells.
  • Aspect 58 The method of any of aspects 50 through 57, further comprising: transmitting, via the control signaling, an indication of a set of beam application times associated with one or more candidate cells from the set of candidate cells, wherein a respective beam application time of a respective candidate cell is the same as a second beam application time associated with the serving cell or is different from the second beam application time, and wherein the indication of the selection of the candidate cell is based at least in part on the set of beam application times.
  • a UE for wireless communications comprising one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to perform a method of any of aspects 1 through 10.
  • a UE for wireless communications comprising at least one means for performing a method of any of aspects 1 through 10.
  • Aspect 61 A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by a processor to perform a method of any of aspects 1 through 10.
  • a UE for wireless communications comprising one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to perform a method of any of aspects 11 through 21.
  • a UE for wireless communications comprising at least one means for performing a method of any of aspects 11 through 21.
  • Aspect 64 A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by a processor to perform a method of any of aspects 11 through 21.
  • a UE for wireless communications comprising one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to perform a method of any of aspects 22 through 31.
  • Aspect 66 A UE for wireless communications, comprising at least one means for performing a method of any of aspects 22 through 31.
  • Aspect 67 A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by a processor to perform a method of any of aspects 22 through 31.
  • a network entity for wireless communications comprising one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the network entity to perform a method of any of aspects 32 through 39.
  • a network entity for wireless communications comprising at least one means for performing a method of any of aspects 32 through 39.
  • Aspect 70 A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by a processor to perform a method of any of aspects 32 through 39.
  • a network entity for wireless communications comprising one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the network entity to perform a method of any of aspects 40 through 49.
  • a network entity for wireless communications comprising at least one means for performing a method of any of aspects 40 through 49.
  • Aspect 73 A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by a processor to perform a method of any of aspects 40 through 49.
  • a network entity for wireless communications comprising one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the network entity to perform a method of any of aspects 50 through 58.
  • a network entity for wireless communications comprising at least one means for performing a method of any of aspects 50 through 58.
  • Aspect 76 A non-transitory computer-readable medium storing code for wireless communications, the code comprising instructions executable by a processor to perform a method of any of aspects 50 through 58.
  • LTE, LTE-A, LTE-A Pro, or NR may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks.
  • the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB) , Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein.
  • UMB Ultra Mobile Broadband
  • IEEE Institute of Electrical and Electronics Engineers
  • Wi-Fi Institute of Electrical and Electronics Engineers
  • WiMAX IEEE 802.16
  • IEEE 802.20 Flash-OFDM
  • Information and signals described herein may be represented using any of a variety of different technologies and techniques.
  • data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
  • a general-purpose processor may be a microprocessor but, in the alternative, the processor may be any processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) . Any functions or operations described herein as being capable of being performed by a processor may be performed by multiple processors that, individually or collectively, are capable of performing the described functions or operations.
  • the functions described herein may be implemented using hardware, software executed by a processor, firmware, or any combination thereof. If implemented using software executed by a processor, the functions may be stored as or transmitted using one or more instructions or code of a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
  • Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer.
  • non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
  • any connection is properly termed a computer-readable medium.
  • the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) , or wireless technologies such as infrared, radio, and microwave
  • the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium.
  • Disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD) , floppy disk and Blu-ray disc. Disks may reproduce data magnetically, and discs may reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media. Any functions or operations described herein as being capable of being performed by a memory may be performed by multiple memories that, individually or collectively, are capable of performing the described functions or operations.
  • the article “a” before a noun is open-ended and understood to refer to “at least one” of those nouns or “one or more” of those nouns.
  • the terms “a, ” “at least one, ” “one or more, ” “at least one of one or more” may be interchangeable.
  • a component that performs one or more functions
  • each of the individual functions may be performed by a single component or by any combination of multiple components.
  • the term “acomponent” having characteristics or performing functions may refer to “at least one of one or more components” having a particular characteristic or performing a particular function.
  • a component introduced with the article “a” using the terms “the” or “said” may refer to any or all of the one or more components.
  • a component introduced with the article “a” may be understood to mean “one or more components, ” and referring to “the component” subsequently in the claims may be understood to be equivalent to referring to “at least one of the one or more components.
  • subsequent reference to a component introduced as “one or more components” using the terms “the” or “said” may refer to any or all of the one or more components.
  • referring to “the one or more components” subsequently in the claims may be understood to be equivalent to referring to “at least one of the one or more components. ”
  • determining encompasses a variety of actions and, therefore, “determining” can include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, a database or another data structure) , ascertaining and the like. Also, “determining” can include receiving (e.g., receiving information) , accessing (e.g., accessing data stored in memory) and the like. Also, “determining” can include resolving, obtaining, selecting, choosing, establishing, and other such similar actions.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne des procédés, des systèmes et des dispositifs destinés aux communications sans fil. Un équipement utilisateur (UE) peut recevoir une signalisation de commande provenant d'une cellule de desserte connectée à l'UE. La signalisation de commande peut indiquer des informations pour une procédure de transfert déclenchée par mobilité de couche inférieure. La signalisation de commande peut comprendre des informations destinées à acquérir des valeurs d'avance temporelle à partir d'un ensemble de cellules candidates, des informations associées à la mesure d'une qualité de signal d'un ou de plusieurs signaux de référence d'un ensemble de signaux de référence à partir de l'ensemble de cellules candidates, des informations associées à des paramètres de formation de faisceau pour l'ensemble de cellules candidates, ou une combinaison de celles-ci. L'UE peut sélectionner une cellule candidate parmi l'ensemble de cellules candidates tandis que l'UE est connecté à la cellule de desserte sur la base des informations indiquées par l'intermédiaire de la signalisation de commande. L'UE peut recevoir une commande de commutation de cellule provenant de la cellule de desserte pour se connecter à la cellule candidate sélectionnée.
PCT/CN2023/109751 2023-07-28 2023-07-28 Signalisation pour transferts de mobilité déclenchés par une couche inférieure Pending WO2025024953A1 (fr)

Priority Applications (1)

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PCT/CN2023/109751 WO2025024953A1 (fr) 2023-07-28 2023-07-28 Signalisation pour transferts de mobilité déclenchés par une couche inférieure

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Application Number Priority Date Filing Date Title
PCT/CN2023/109751 WO2025024953A1 (fr) 2023-07-28 2023-07-28 Signalisation pour transferts de mobilité déclenchés par une couche inférieure

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WO2025024953A1 true WO2025024953A1 (fr) 2025-02-06

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107005932A (zh) * 2014-10-01 2017-08-01 英特尔Ip公司 宏小区辅助的小小区网络中的移动通信
US20210058834A1 (en) * 2019-08-22 2021-02-25 Qualcomm Incorporated Conditional handover and radio link failure timer interaction
CN113259999A (zh) * 2020-02-10 2021-08-13 华为技术有限公司 一种网络资源配置的方法和装置
CN116266962A (zh) * 2021-12-17 2023-06-20 华硕电脑股份有限公司 无线通信系统中用于上行链路时间对准的方法和设备
CN116391393A (zh) * 2020-11-02 2023-07-04 瑞典爱立信有限公司 用于nr中的移动性相关切换的方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107005932A (zh) * 2014-10-01 2017-08-01 英特尔Ip公司 宏小区辅助的小小区网络中的移动通信
US20210058834A1 (en) * 2019-08-22 2021-02-25 Qualcomm Incorporated Conditional handover and radio link failure timer interaction
CN113259999A (zh) * 2020-02-10 2021-08-13 华为技术有限公司 一种网络资源配置的方法和装置
CN116391393A (zh) * 2020-11-02 2023-07-04 瑞典爱立信有限公司 用于nr中的移动性相关切换的方法
CN116266962A (zh) * 2021-12-17 2023-06-20 华硕电脑股份有限公司 无线通信系统中用于上行链路时间对准的方法和设备

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