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WO2024239191A1 - Commande de puissance pour transmissions en liaison montante - Google Patents

Commande de puissance pour transmissions en liaison montante Download PDF

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Publication number
WO2024239191A1
WO2024239191A1 PCT/CN2023/095469 CN2023095469W WO2024239191A1 WO 2024239191 A1 WO2024239191 A1 WO 2024239191A1 CN 2023095469 W CN2023095469 W CN 2023095469W WO 2024239191 A1 WO2024239191 A1 WO 2024239191A1
Authority
WO
WIPO (PCT)
Prior art keywords
power control
control parameters
network node
indication
target cell
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/CN2023/095469
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English (en)
Inventor
Fang Yuan
Yan Zhou
Jae Ho Ryu
Changhwan Park
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Priority to PCT/CN2023/095469 priority Critical patent/WO2024239191A1/fr
Publication of WO2024239191A1 publication Critical patent/WO2024239191A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H04W52/10—Open loop power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/38—TPC being performed in particular situations
    • H04W52/40—TPC being performed in particular situations during macro-diversity or soft handoff
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/38—TPC being performed in particular situations
    • H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

Definitions

  • aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for power control for uplink transmissions.
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, or the like) .
  • multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE) .
  • LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • UMTS Universal Mobile Telecommunications System
  • a wireless network may include one or more network nodes that support communication for wireless communication devices, such as a user equipment (UE) or multiple UEs.
  • a UE may communicate with a network node via downlink communications and uplink communications.
  • Downlink (or “DL” ) refers to a communication link from the network node to the UE
  • uplink (or “UL” ) refers to a communication link from the UE to the network node.
  • Some wireless networks may support device-to-device communication, such as via a local link (e.g., a sidelink (SL) , a wireless local area network (WLAN) link, and/or a wireless personal area network (WPAN) link, among other examples) .
  • SL sidelink
  • WLAN wireless local area network
  • WPAN wireless personal area network
  • New Radio which may be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the 3GPP.
  • NR is designed to better support mobile broadband internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink, using CP-OFDM and/or single-carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the uplink, as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • OFDM orthogonal frequency division multiplexing
  • SC-FDM single-carrier frequency division multiplexing
  • DFT-s-OFDM discrete Fourier transform spread OFDM
  • MIMO multiple-input multiple-output
  • Some aspects described herein relate to a method of wireless communication performed by a user equipment (UE) .
  • the method may include receiving, after the UE is triggered to perform physical random access channel transmissions to a target cell, an indication of one or more power control parameters to be used for uplink transmissions to the target cell.
  • the method may include transmitting to the target cell in accordance with the one or more power control parameters.
  • the method may include transmitting, after a UE is triggered to perform physical random access channel transmissions to a target cell, an indication of one or more power control parameters to be used by the UE for uplink transmissions to the target cell.
  • the UE may include one or more memories and one or more processors coupled to the one or more memories.
  • the one or more processors may be configured to receive, after the UE is triggered to perform physical random access channel transmissions to a target cell, an indication of one or more power control parameters to be used for uplink transmissions to the target cell.
  • the one or more processors may be configured to transmit to the target cell in accordance with the one or more power control parameters.
  • Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a UE.
  • the set of instructions when executed by one or more processors of the UE, may cause the UE to receive, after the UE is triggered to perform physical random access channel transmissions to a target cell, an indication of one or more power control parameters to be used for uplink transmissions to the target cell.
  • the set of instructions when executed by one or more processors of the UE, may cause the UE to transmit to the target cell in accordance with the one or more power control parameters.
  • Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a network node.
  • the set of instructions when executed by one or more processors of the network node, may cause the network node to transmit, after a UE is triggered to perform physical random access channel transmissions to a target cell, an indication of one or more power control parameters to be used by the UE for uplink transmissions to the target cell.
  • the apparatus may include means for receiving, after the apparatus is triggered to perform physical random access channel transmissions to a target cell, an indication of one or more power control parameters to be used for uplink transmissions to the target cell.
  • the apparatus may include means for transmitting to the target cell in accordance with the one or more power control parameters.
  • the apparatus may include means for transmitting, after a UE is triggered to perform physical random access channel transmissions to a target cell, an indication of one or more power control parameters to be used by the UE for uplink transmissions to the target cell.
  • aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, network entity, network node, wireless communication device, and/or processing system as substantially described herein with reference to and as illustrated by the drawings.
  • aspects are described in the present disclosure by illustration to some examples, those skilled in the art will understand that such aspects may be implemented in many different arrangements and scenarios.
  • Techniques described herein may be implemented using different platform types, devices, systems, shapes, sizes, and/or packaging arrangements.
  • some aspects may be implemented via integrated chip embodiments or other non-module-component based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail/purchasing devices, medical devices, and/or artificial intelligence devices) .
  • Aspects may be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, and/or system-level components.
  • Devices incorporating described aspects and features may include additional components and features for implementation and practice of claimed and described aspects.
  • Fig. 2 is a diagram illustrating an example of a network node in communication with a user equipment (UE) in a wireless network, in accordance with the present disclosure.
  • UE user equipment
  • Fig. 3 is a diagram illustrating an example disaggregated base station architecture, in accordance with the present disclosure.
  • Fig. 4 is a diagram illustrating an example of a lower-layer triggered mobility procedure, in accordance with the present disclosure.
  • Fig. 5 is a diagram illustrating an example of power control for uplink transmissions, in accordance with the present disclosure.
  • Fig. 6 is a diagram illustrating an example process performed, for example, by a UE, in accordance with the present disclosure.
  • Fig. 7 is a diagram illustrating an example process performed, for example, by a network node, in accordance with the present disclosure.
  • Fig. 8 is a diagram of an example apparatus for wireless communication, in accordance with the present disclosure.
  • Fig. 9 is a diagram of an example apparatus for wireless communication, in accordance with the present disclosure.
  • the L1/L2-based inter-cell mobility procedure may be performed with or without carrier aggregation (CA) .
  • CA carrier aggregation
  • PDCCH physical downlink control channel
  • RACH random access channel
  • a PDCCH order may indicate whether or not power ramping is to be performed. If power ramping is performed, the PDCCH order may indicate whether a PRACH transmission is an initial transmission or a retransmission, and a power ramping-up value may be configured. Alternatively, if power ramping is not performed, the power may be determined in accordance with an open-loop power control (OLPC) .
  • OLPC open-loop power control
  • the OLPC may not be sufficient for an initial transmission on a target cell, such as for a physical uplink shared channel (PUSCH) , physical uplink control channel (PUCCH) , or sounding reference signal (SRS) transmission on the target cell, particularly when a previous RACH has one or more retransmissions.
  • PUSCH physical uplink shared channel
  • PUCCH physical uplink control channel
  • SRS sounding reference signal
  • a UE may be triggered to perform PRACH transmissions to a target cell. After the UE is triggered to perform the PRACH transmissions to the target cell, the UE may receive an indication of one or more power control parameters to be used for uplink transmissions to the target cell.
  • the one or more power control parameters may be dynamically indicated to the UE by a network node for uplink transmissions to the target cell.
  • the network node may indicate the one or more power control parameters via a random access response, an LTM cell switching command, or DCI, among other examples.
  • the one or more power control parameters may include, for example, an open-loop power control parameter, a closed-loop power control parameter, or a power boost value.
  • the UE may transmit to the target cell in accordance with the one or more power control parameters.
  • the UE may transmit to a target cell using power control parameters that are sufficient for initial transmissions to the target cell.
  • the UE may transmit to the target cell using one or more power control parameters that are sufficient for initial transmissions to the target cell when a previous PRACH has one or more retransmissions.
  • the power control parameters may be dynamically indicated to the UE by a network node in accordance with network conditions. Transmitting in accordance with the one or more power control parameters may improve a likelihood of reception of the transmission by the target cell. Additionally, or alternatively, transmitting in accordance with the one or more power control parameters may reduce network energy resources by preventing transmission power levels that are higher than necessary for a successful transmission.
  • NR New Radio
  • RAT radio access technology
  • Fig. 1 is a diagram illustrating an example of a wireless network 100, in accordance with the present disclosure.
  • the wireless network 100 may be or may include elements of a 5G (e.g., NR) network and/or a 4G (e.g., Long Term Evolution (LTE) ) network, among other examples.
  • 5G e.g., NR
  • 4G e.g., Long Term Evolution (LTE) network
  • the wireless network 100 may include one or more network nodes 110 (shown as a network node 110a, a network node 110b, a network node 110c, and a network node 110d) , a user equipment (UE) 120 or multiple UEs 120 (shown as a UE 120a, a UE 120b, a UE 120c, a UE 120d, and a UE 120e) , and/or other entities.
  • a network node 110 is a network node that communicates with UEs 120. As shown, a network node 110 may include one or more network nodes.
  • a network node 110 may be an aggregated network node, meaning that the aggregated network node is configured to utilize a radio protocol stack that is physically or logically integrated within a single radio access network (RAN) node (e.g., within a single device or unit) .
  • RAN radio access network
  • a network node 110 may be a disaggregated network node (sometimes referred to as a disaggregated base station) , meaning that the network node 110 is configured to utilize a protocol stack that is physically or logically distributed among two or more nodes (such as one or more central units (CUs) , one or more distributed units (DUs) , or one or more radio units (RUs) ) .
  • CUs central units
  • DUs distributed units
  • RUs radio units
  • a network node 110 is or includes a network node that communicates with UEs 120 via a radio access link, such as an RU. In some examples, a network node 110 is or includes a network node that communicates with other network nodes 110 via a fronthaul link or a midhaul link, such as a DU. In some examples, a network node 110 is or includes a network node that communicates with other network nodes 110 via a midhaul link or a core network via a backhaul link, such as a CU.
  • a network node 110 may include multiple network nodes, such as one or more RUs, one or more CUs, and/or one or more DUs.
  • a network node 110 may include, for example, an NR base station, an LTE base station, a Node B, an eNB (e.g., in 4G) , a gNB (e.g., in 5G) , an access point, a transmission reception point (TRP) , a DU, an RU, a CU, a mobility element of a network, a core network node, a network element, a network equipment, a RAN node, or a combination thereof.
  • the network nodes 110 may be interconnected to one another or to one or more other network nodes 110 in the wireless network 100 through various types of fronthaul, midhaul, and/or backhaul interfaces, such as a direct physical connection, an air interface, or a virtual network, using any suitable transport network.
  • a network node 110 may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a network node 110 and/or a network node subsystem serving this coverage area, depending on the context in which the term is used.
  • a network node 110 may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell.
  • a macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs 120 with service subscriptions.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs 120 with service subscriptions.
  • a femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs 120 having association with the femto cell (e.g., UEs 120 in a closed subscriber group (CSG) ) .
  • a network node 110 for a macro cell may be referred to as a macro network node.
  • a network node 110 for a pico cell may be referred to as a pico network node.
  • a network node 110 for a femto cell may be referred to as a femto network node or an in-home network node. In the example shown in Fig.
  • the network node 110a may be a macro network node for a macro cell 102a
  • the network node 110b may be a pico network node for a pico cell 102b
  • the network node 110c may be a femto network node for a femto cell 102c.
  • a network node may support one or multiple (e.g., three) cells.
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a network node 110 that is mobile (e.g., a mobile network node) .
  • base station or “network node” may refer to an aggregated base station, a disaggregated base station, an integrated access and backhaul (IAB) node, a relay node, or one or more components thereof.
  • base station or “network node” may refer to a CU, a DU, an RU, a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC) , or a Non-Real Time (Non-RT) RIC, or a combination thereof.
  • the terms “base station” or “network node” may refer to one device configured to perform one or more functions, such as those described herein in connection with the network node 110.
  • the terms “base station” or “network node” may refer to a plurality of devices configured to perform the one or more functions. For example, in some distributed systems, each of a quantity of different devices (which may be located in the same geographic location or in different geographic locations) may be configured to perform at least a portion of a function, or to duplicate performance of at least a portion of the function, and the terms “base station” or “network node” may refer to any one or more of those different devices.
  • the terms “base station” or “network node” may refer to one or more virtual base stations or one or more virtual base station functions. For example, in some aspects, two or more base station functions may be instantiated on a single device.
  • the terms “base station” or “network node” may refer to one of the base station functions and not another. In this way, a single device may include more than one base station.
  • the wireless network 100 may include one or more relay stations.
  • a relay station is a network node that can receive a transmission of data from an upstream node (e.g., a network node 110 or a UE 120) and send a transmission of the data to a downstream node (e.g., a UE 120 or a network node 110) .
  • a relay station may be a UE 120 that can relay transmissions for other UEs 120.
  • the network node 110d e.g., a relay network node
  • the network node 110a may communicate with the network node 110a (e.g., a macro network node) and the UE 120d in order to facilitate communication between the network node 110a and the UE 120d.
  • a network node 110 that relays communications may be referred to as a relay station, a relay base station, a relay network node, a relay node, a relay, or the like.
  • the wireless network 100 may be a heterogeneous network that includes network nodes 110 of different types, such as macro network nodes, pico network nodes, femto network nodes, relay network nodes, or the like. These different types of network nodes 110 may have different transmit power levels, different coverage areas, and/or different impacts on interference in the wireless network 100. For example, macro network nodes may have a high transmit power level (e.g., 5 to 40 watts) whereas pico network nodes, femto network nodes, and relay network nodes may have lower transmit power levels (e.g., 0.1 to 2 watts) .
  • macro network nodes may have a high transmit power level (e.g., 5 to 40 watts)
  • pico network nodes, femto network nodes, and relay network nodes may have lower transmit power levels (e.g., 0.1 to 2 watts) .
  • a network controller 130 may couple to or communicate with a set of network nodes 110 and may provide coordination and control for these network nodes 110.
  • the network controller 130 may communicate with the network nodes 110 via a backhaul communication link or a midhaul communication link.
  • the network nodes 110 may communicate with one another directly or indirectly via a wireless or wireline backhaul communication link.
  • the network controller 130 may be a CU or a core network device, or may include a CU or a core network device.
  • the UEs 120 may be dispersed throughout the wireless network 100, and each UE 120 may be stationary or mobile.
  • a UE 120 may include, for example, an access terminal, a terminal, a mobile station, and/or a subscriber unit.
  • a UE 120 may be a cellular phone (e.g., a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring or a smart bracelet) ) , an entertainment device (e.g., a music device, a video device, and/or a satellite radio)
  • Some UEs 120 may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs.
  • An MTC UE and/or an eMTC UE may include, for example, a robot, an unmanned aerial vehicle, a remote device, a sensor, a meter, a monitor, and/or a location tag, that may communicate with a network node, another device (e.g., a remote device) , or some other entity.
  • Some UEs 120 may be considered Internet-of-Things (IoT) devices, and/or may be implemented as NB-IoT (narrowband IoT) devices.
  • Some UEs 120 may be considered a Customer Premises Equipment.
  • a UE 120 may be included inside a housing that houses components of the UE 120, such as processor components and/or memory components.
  • the processor components and the memory components may be coupled together.
  • the processor components e.g., one or more processors
  • the memory components e.g., a memory
  • the processor components and the memory components may be operatively coupled, communicatively coupled, electronically coupled, and/or electrically coupled.
  • any number of wireless networks 100 may be deployed in a given geographic area.
  • Each wireless network 100 may support a particular RAT and may operate on one or more frequencies.
  • a RAT may be referred to as a radio technology, an air interface, or the like.
  • a frequency may be referred to as a carrier, a frequency channel, or the like.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.
  • NR or 5G RAT networks may be deployed.
  • two or more UEs 120 may communicate directly using one or more sidelink channels (e.g., without using a network node 110 as an intermediary to communicate with one another) .
  • the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, or a vehicle-to-pedestrian (V2P) protocol) , and/or a mesh network.
  • V2X vehicle-to-everything
  • a UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the network node 110.
  • Devices of the wireless network 100 may communicate using the electromagnetic spectrum, which may be subdivided by frequency or wavelength into various classes, bands, channels, or the like. For example, devices of the wireless network 100 may communicate using one or more operating bands.
  • devices of the wireless network 100 may communicate using one or more operating bands.
  • two initial operating bands have been identified as frequency range designations FR1 (410 MHz –7.125 GHz) and FR2 (24.25 GHz –52.6 GHz) . It should be understood that although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “Sub-6 GHz” band in various documents and articles.
  • FR2 which is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz –300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.
  • EHF extremely high frequency
  • ITU International Telecommunications Union
  • FR3 7.125 GHz –24.25 GHz
  • FR3 7.125 GHz –24.25 GHz
  • Frequency bands falling within FR3 may inherit FR1 characteristics and/or FR2 characteristics, and thus may effectively extend features of FR1 and/or FR2 into mid-band frequencies.
  • higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz.
  • FR4a or FR4-1 52.6 GHz –71 GHz
  • FR4 52.6 GHz –114.25 GHz
  • FR5 114.25 GHz –300 GHz
  • sub-6 GHz may broadly represent frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies.
  • millimeter wave may broadly represent frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a or FR4-1, and/or FR5, or may be within the EHF band.
  • frequencies included in these operating bands may be modified, and techniques described herein are applicable to those modified frequency ranges.
  • the UE 120 may include a communication manager 140.
  • the communication manager 140 may receive, after the UE is triggered to perform physical random access channel transmissions to a target cell, an indication of one or more power control parameters to be used for uplink transmissions to the target cell; and transmit to the target cell in accordance with the one or more power control parameters. Additionally, or alternatively, the communication manager 140 may perform one or more other operations described herein.
  • the network node 110 may include a communication manager 150.
  • the communication manager 150 may transmit, after a UE is triggered to perform physical random access channel transmissions to a target cell, an indication of one or more power control parameters to be used by the UE for uplink transmissions to the target cell. Additionally, or alternatively, the communication manager 150 may perform one or more other operations described herein.
  • Fig. 1 is provided as an example. Other examples may differ from what is described with regard to Fig. 1.
  • Fig. 2 is a diagram illustrating an example 200 of a network node 110 in communication with a UE 120 in a wireless network 100, in accordance with the present disclosure.
  • the network node 110 may be equipped with a set of antennas 234a through 234t, such as T antennas (T ⁇ 1) .
  • the UE 120 may be equipped with a set of antennas 252a through 252r, such as R antennas (R ⁇ 1) .
  • the network node 110 of example 200 includes one or more radio frequency components, such as antennas 234 and a modem 232.
  • a network node 110 may include an interface, a communication component, or another component that facilitates communication with the UE 120 or another network node.
  • Some network nodes 110 may not include radio frequency components that facilitate direct communication with the UE 120, such as one or more CUs, or one or more DUs.
  • a transmit processor 220 may receive data, from a data source 212, intended for the UE 120 (or a set of UEs 120) .
  • the transmit processor 220 may select one or more modulation and coding schemes (MCSs) for the UE 120 based at least in part on one or more channel quality indicators (CQIs) received from that UE 120.
  • MCSs modulation and coding schemes
  • CQIs channel quality indicators
  • the network node 110 may process (e.g., encode and modulate) the data for the UE 120 based at least in part on the MCS (s) selected for the UE 120 and may provide data symbols for the UE 120.
  • the transmit processor 220 may process system information (e.g., for semi-static resource partitioning information (SRPI) ) and control information (e.g., CQI requests, grants, and/or upper layer signaling) and provide overhead symbols and control symbols.
  • the transmit processor 220 may generate reference symbols for reference signals (e.g., a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS) ) and synchronization signals (e.g., a primary synchronization signal (PSS) or a secondary synchronization signal (SSS) ) .
  • reference signals e.g., a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS)
  • synchronization signals e.g., a primary synchronization signal (PSS) or a secondary synchronization signal (SSS)
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modems) , shown as modems 232a through 232t.
  • each output symbol stream may be provided to a modulator component (shown as MOD) of a modem 232.
  • Each modem 232 may use a respective modulator component to process a respective output symbol stream (e.g., for OFDM) to obtain an output sample stream.
  • Each modem 232 may further use a respective modulator component to process (e.g., convert to analog, amplify, filter, and/or upconvert) the output sample stream to obtain a downlink signal.
  • the modems 232a through 232t may transmit a set of downlink signals (e.g., T downlink signals) via a corresponding set of antennas 234 (e.g., T antennas) , shown as antennas 234a through 234t.
  • a set of antennas 252 may receive the downlink signals from the network node 110 and/or other network nodes 110 and may provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems) , shown as modems 254a through 254r.
  • R received signals e.g., R received signals
  • each received signal may be provided to a demodulator component (shown as DEMOD) of a modem 254.
  • DEMOD demodulator component
  • Each modem 254 may use a respective demodulator component to condition (e.g., filter, amplify, downconvert, and/or digitize) a received signal to obtain input samples.
  • Each modem 254 may use a demodulator component to further process the input samples (e.g., for OFDM) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from the modems 254, may perform MIMO detection on the received symbols if applicable, and may provide detected symbols.
  • a receive processor 258 may process (e.g., demodulate and decode) the detected symbols, may provide decoded data for the UE 120 to a data sink 260, and may provide decoded control information and system information to a controller/processor 280.
  • controller/processor may refer to one or more controllers, one or more processors, or a combination thereof.
  • a channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and/or a CQI parameter, among other examples.
  • RSRP reference signal received power
  • RSSI received signal strength indicator
  • RSSRQ reference signal received quality
  • CQI CQI parameter
  • the network controller 130 may include a communication unit 294, a controller/processor 290, and a memory 292.
  • the network controller 130 may include, for example, one or more devices in a core network.
  • the network controller 130 may communicate with the network node 110 via the communication unit 294.
  • One or more antennas may include, or may be included within, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and/or one or more antenna arrays, among other examples.
  • An antenna panel, an antenna group, a set of antenna elements, and/or an antenna array may include one or more antenna elements (within a single housing or multiple housings) , a set of coplanar antenna elements, a set of non-coplanar antenna elements, and/or one or more antenna elements coupled to one or more transmission and/or reception components, such as one or more components of Fig. 2.
  • a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports that include RSRP, RSSI, RSRQ, and/or CQI) from the controller/processor 280.
  • the transmit processor 264 may generate reference symbols for one or more reference signals.
  • the symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by the modems 254 (e.g., for DFT-s-OFDM or CP-OFDM) , and transmitted to the network node 110.
  • the modem 254 of the UE 120 may include a modulator and a demodulator.
  • the UE 120 includes a transceiver.
  • the transceiver may include any combination of the antenna (s) 252, the modem (s) 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, and/or the TX MIMO processor 266.
  • the transceiver may be used by a processor (e.g., the controller/processor 280) and the memory 282 to perform aspects of any of the methods described herein (e.g., with reference to Figs. 5-9) .
  • the uplink signals from UE 120 and/or other UEs may be received by the antennas 234, processed by the modem 232 (e.g., a demodulator component, shown as DEMOD, of the modem 232) , detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by the UE 120.
  • the receive processor 238 may provide the decoded data to a data sink 239 and provide the decoded control information to the controller/processor 240.
  • the network node 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244.
  • the network node 110 may include a scheduler 246 to schedule one or more UEs 120 for downlink and/or uplink communications.
  • the modem 232 of the network node 110 may include a modulator and a demodulator.
  • the network node 110 includes a transceiver.
  • the transceiver may include any combination of the antenna (s) 234, the modem (s) 232, the MIMO detector 236, the receive processor 238, the transmit processor 220, and/or the TX MIMO processor 230.
  • the transceiver may be used by a processor (e.g., the controller/processor 240) and the memory 242 to perform aspects of any of the methods described herein (e.g., with reference to Figs. 5-9) .
  • the controller/processor 240 of the network node 110, the controller/processor 280 of the UE 120, and/or any other component (s) of Fig. 2 may perform one or more techniques associated with power control for uplink transmissions, as described in more detail elsewhere herein.
  • the controller/processor 240 of the network node 110, the controller/processor 280 of the UE 120, and/or any other component (s) of Fig. 2 may perform or direct operations of, for example, process 600 of Fig. 6, process 700 of Fig. 7, and/or other processes as described herein.
  • the memory 242 and the memory 282 may store data and program codes for the network node 110 and the UE 120, respectively.
  • the UE 120 includes means for receiving, after the UE is triggered to perform physical random access channel transmissions to a target cell, an indication of one or more power control parameters to be used for uplink transmissions to the target cell; and/or means for transmitting to the target cell in accordance with the one or more power control parameters.
  • the means for the UE 120 to perform operations described herein may include, for example, one or more of communication manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller/processor 280, or memory 282.
  • an individual processor may perform all of the functions described as being performed by the one or more processors.
  • one or more processors may collectively perform a set of functions. For example, a first set of (one or more) processors of the one or more processors may perform a first function described as being performed by the one or more processors, and a second set of (one or more) processors of the one or more processors may perform a second function described as being performed by the one or more processors.
  • the first set of processors and the second set of processors may be the same set of processors or may be different sets of processors. Reference to “one or more processors” should be understood to refer to any one or more of the processors described in connection with Fig. 2.
  • references to “one or more memories” should be understood to refer to any one or more memories of a corresponding device, such as the memory described in connection with Fig. 2.
  • functions described as being performed by one or more memories can be performed by the same subset of the one or more memories or different subsets of the one or more memories.
  • While blocks in Fig. 2 are illustrated as distinct components, the functions described above with respect to the blocks may be implemented in a single hardware, software, or combination component or in various combinations of components.
  • the functions described with respect to the transmit processor 264, the receive processor 258, and/or the TX MIMO processor 266 may be performed by or under the control of the controller/processor 280.
  • Fig. 2 is provided as an example. Other examples may differ from what is described with regard to Fig. 2.
  • An aggregated base station may be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (e.g., within a single device or unit) .
  • a disaggregated base station e.g., a disaggregated network node
  • a CU may be implemented within a network node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed throughout one or multiple other network nodes.
  • the DUs may be implemented to communicate with one or more RUs.
  • Each of the CU, DU, and RU also can be implemented as virtual units, such as a virtual central unit (VCU) , a virtual distributed unit (VDU) , or a virtual radio unit (VRU) , among other examples.
  • VCU virtual central unit
  • VDU virtual distributed unit
  • VRU virtual radio unit
  • Fig. 3 is a diagram illustrating an example disaggregated base station architecture 300, in accordance with the present disclosure.
  • the disaggregated base station architecture 300 may include a CU 310 that can communicate directly with a core network 320 via a backhaul link, or indirectly with the core network 320 through one or more disaggregated control units (such as a Near-RT RIC 325 via an E2 link, or a Non-RT RIC 315 associated with a Service Management and Orchestration (SMO) Framework 305, or both) .
  • a CU 310 may communicate with one or more DUs 330 via respective midhaul links, such as through F1 interfaces.
  • Each of the DUs 330 may communicate with one or more RUs 340 via respective fronthaul links.
  • Each of the RUs 340 may communicate with one or more UEs 120 via respective radio frequency (RF) access links.
  • RF radio frequency
  • a CU-UP unit can communicate bidirectionally with a CU-CP unit via an interface, such as the E1 interface when implemented in an O-RAN configuration.
  • the CU 310 can be implemented to communicate with a DU 330, as necessary, for network control and signaling.
  • Each DU 330 may correspond to a logical unit that includes one or more base station functions to control the operation of one or more RUs 340.
  • the DU 330 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers depending, at least in part, on a functional split, such as a functional split defined by the 3GPP.
  • the one or more high PHY layers may be implemented by one or more modules for forward error correction (FEC) encoding and decoding, scrambling, and modulation and demodulation, among other examples.
  • FEC forward error correction
  • the DU 330 may further host one or more low PHY layers, such as implemented by one or more modules for a fast Fourier transform (FFT) , an inverse FFT (iFFT) , digital beamforming, or physical random access channel (PRACH) extraction and filtering, among other examples.
  • FFT fast Fourier transform
  • iFFT inverse FFT
  • PRACH physical random access channel
  • Each layer (which also may be referred to as a module) can be implemented with an interface configured to communicate signals with other layers (and modules) hosted by the DU 330, or with the control functions hosted by the CU 310.
  • Each RU 340 may implement lower-layer functionality.
  • an RU 340, controlled by a DU 330 may correspond to a logical node that hosts RF processing functions or low-PHY layer functions, such as performing an FFT, performing an iFFT, digital beamforming, or PRACH extraction and filtering, among other examples, based on a functional split (for example, a functional split defined by the 3GPP) , such as a lower layer functional split.
  • each RU 340 can be operated to handle over the air (OTA) communication with one or more UEs 120.
  • OTA over the air
  • real-time and non-real-time aspects of control and user plane communication with the RU (s) 340 can be controlled by the corresponding DU 330.
  • this configuration can enable each DU 330 and the CU 310 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.
  • the SMO Framework 305 may be configured to support RAN deployment and provisioning of non-virtualized and virtualized network elements.
  • the SMO Framework 305 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operations and maintenance interface (such as an O1 interface) .
  • the SMO Framework 305 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) platform 390) to perform network element life cycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface (such as an O2 interface) .
  • a cloud computing platform such as an open cloud (O-Cloud) platform 390
  • network element life cycle management such as to instantiate virtualized network elements
  • a cloud computing platform interface such as an O2 interface
  • Such virtualized network elements can include, but are not limited to, CUs 310, DUs 330, RUs 340, non-RT RICs 315, and Near-RT RICs 325.
  • the SMO Framework 305 can communicate with a hardware aspect of a 4G RAN, such as an open eNB (O-eNB) 311, via an O1 interface. Additionally, in some implementations, the SMO Framework 305 can communicate directly with each of one or more RUs 340 via a respective O1 interface.
  • the SMO Framework 305 also may include a Non-RT RIC 315 configured to support functionality of the SMO Framework 305.
  • the Non-RT RIC 315 may be configured to include a logical function that enables non-real-time control and optimization of RAN elements and resources, Artificial Intelligence/Machine Learning (AI/ML) workflows including model training and updates, or policy-based guidance of applications/features in the Near-RT RIC 325.
  • the Non-RT RIC 315 may be coupled to or communicate with (such as via an A1 interface) the Near-RT RIC 325.
  • the Near-RT RIC 325 may be configured to include a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions over an interface (such as via an E2 interface) connecting one or more CUs 310, one or more DUs 330, or both, as well as an O-eNB, with the Near-RT RIC 325.
  • the Non-RT RIC 315 may receive parameters or external enrichment information from external servers. Such information may be utilized by the Near-RT RIC 325 and may be received at the SMO Framework 305 or the Non-RT RIC 315 from non-network data sources or from network functions. In some examples, the Non-RT RIC 315 or the Near-RT RIC 325 may be configured to tune RAN behavior or performance. For example, the Non-RT RIC 315 may monitor long-term trends and patterns for performance and employ AI/ML models to perform corrective actions through the SMO Framework 305 (such as reconfiguration via an O1 interface) or via creation of RAN management policies (such as A1 interface policies) .
  • Fig. 3 is provided as an example. Other examples may differ from what is described with regard to Fig. 3.
  • a network node 110 may instruct a UE 120 to change serving cells, such as when the UE 120 moves away from coverage of a current serving cell (sometimes referred to as a source cell) and towards coverage of a neighboring cell (sometimes referred to as a target cell) .
  • the network node 110 may instruct the UE 120 to change cells using a layer 3 (L3) handover procedure.
  • L3 layer 3
  • An L3 handover procedure may include the network node 110 transmitting, to the UE 120, an RRC reconfiguration message indicating that the UE 120 should perform a handover procedure to a target cell, which may be transmitted in response to the UE 120 providing the network node 110 with an L3 measurement report indicating signal strength measurements associated with various cells (e.g., measurements associated with the source cell and one or more neighboring cells) .
  • the UE 120 may communicate with the source cell and the target cell to detach from the source cell and connect to the target cell (e.g., the UE 120 may establish an RRC connection with the target cell) .
  • the target cell may communicate with a user plane function (UPF) of a core network to instruct the UPF to switch a user plane path of the UE 120 from the source cell to the target cell.
  • the target cell may also communicate with the source cell to indicate that handover is complete and that the source cell may be released.
  • UPF user plane function
  • L3 handover procedures may be associated with high latency and high overhead due to the multiple RRC reconfiguration messages and/or other L3 signaling and operations used to perform the handover procedures.
  • a UE 120 may be configured to perform a lower-layer (e.g., L1 and/or L2) handover procedure, sometimes referred to an LTM procedure, such as the example 400 LTM procedure shown in Fig 4.
  • the LTM procedure may include four phases: an LTM preparation phase, an early synchronization phase (shown as “early sync” in Fig. 4) , an LTM execution phase, and/or an LTM completion phase.
  • the UE 120 may be in an RRC connected state (sometimes referred to as RRC_Connected) with a source cell.
  • the UE 120 may transmit, and the network node 110 may receive, a measurement report (sometimes referred to as a MeasurementReport) , which may be an L3 measurement report.
  • the measurement report may indicate signal strength measurements (e.g., RSRP, RSSI, RSRQ, and/or CQI) or similar measurements associated with the source cell and/or one or more neighboring cells.
  • the network node 110 may decide to use LTM, and thus, as indicated by reference number 415, the network node 110 may initiate LTM candidate preparation.
  • the network node 110 may transmit, and the UE 120 may receive, an RRC reconfiguration message (sometimes referred to as an RRCReconfiguration message) , which may include an LTM candidate configuration. More particularly, the RRC reconfiguration message may indicate a configuration of one or more LTM candidate target cells, which may be candidate cells to become a serving cell of the UE and/or cells for which the UE 120 may later be triggered to perform an LTM procedure. As shown by reference number 425, the UE 120 may store the configuration of the one or more LTM candidate cell configurations and, in response, may transmit, to the network node 110, an RRC reconfiguration complete message (sometimes referred to as an RRCReconfigurationComplete message) .
  • an RRC reconfiguration complete message sometimes referred to as an RRCReconfigurationComplete message
  • the UE 120 may optionally perform downlink/uplink synchronization with the candidate cells associated with the one or more LTM candidate cell configurations. For example, the UE 120 may perform downlink synchronization and timing advance acquisition with the one or more candidate target cells prior to receiving an LTM switch command (which is described in more detail below in connection with reference number 445) . In some aspects, performing the early synchronization with the one or more candidate cells may reduce latency associated with performing a random access channel (RACH) procedure later in the LTM procedure, which is described in more detail below in connection with reference number 455.
  • RACH random access channel
  • a TCI state information element may indicate information associated with a beam.
  • the TCI state information element may indicate a TCI state identification (for example, a tci-StateID) , a quasi-co-location (QCL) type (for example, a qcl-Type1, qcl-Type2, qcl-TypeA, qcl-TypeB, qcl-TypeC, or a qcl-TypeD, among other examples) , a cell identification (for example, a logical cell ID or a ServCellIndex) , a bandwidth part identification (bwp-Id) , or a reference signal identification, such as a CSI-RS identification (for example, an NZP-CSI-RS-ResourceId or an SSB-Index, among other examples) .
  • CSI-RS identification for example, an NZP-CSI-RS-ResourceId or an SSB-Index, among other examples
  • Spatial relation information may similarly indicate information associated with an uplink beam.
  • the beam indication may be a joint or separate DL/UL beam indication in a unified TCI framework.
  • the network may support common TCI state ID update and activation, which may provide common QCL and/or common UL transmission spatial filters across a set of configured component carriers.
  • This type of beam indication may apply to intra-band carrier aggregation, as well as to joint DL/UL and separate DL/UL beam indications.
  • the common TCI state ID may imply that one reference signal determined according to the TCI state (s) indicated by a common TCI state ID is used to provide QCL Type-D indication and to determine UL transmission spatial filters across the set of configured component carriers.
  • the UE 120 may indicate successful completion of the LTM cell switch towards the target cell.
  • cell switch to a target cell may be performed using less overhead than for an L3 handover procedure and/or a cell switch to a target cell may be associated with reduced latency as compared to L3 handover procedure.
  • a PRACH transmission or retransmission may be scheduled via DCI.
  • a DCI-ordered PRACH retransmission may be supported for a candidate cell in LTM. Additionally, or alternatively, the DCI may be used to update PRACH transmission parameters, such as power control parameters for retransmissions, among other examples.
  • an SpCell may be updated using L1/L2 signaling in accordance with an L1 measurement.
  • An L1/L2-based inter-cell mobility procedure for mobility latency reduction may be performed for intra-frequency mobility and/or for inter-frequency mobility. Additionally, or alternatively, the L1/L2-based inter-cell mobility procedure may be performed with or without CA.
  • a PDCCH order may indicate whether or not power ramping is to be performed. If power ramping is performed, the PDCCH order may indicate whether a PRACH transmission is an initial transmission or a retransmission, and a power ramping-up value may be configured. Alternatively, if power ramping is not performed, the power may be determined in accordance with an OLPC. However, the OLPC may not be sufficient for an initial transmission on a target cell, such as for a PUSCH, PUCCH, or SRS transmission on the target cell, particularly when a previous RACH has one or more retransmissions.
  • Fig. 4 is provided as an example. Other examples may differ from what is described with respect to Fig. 4.
  • Fig. 5 is a diagram illustrating an example 500 of power control for uplink transmissions, in accordance with the present disclosure.
  • the UE 120 may communicate with the network node 110.
  • the network node 110 may be associated with a source cell, such as a serving cell.
  • the network node 110 may be associated with a target cell, such as the target cell 505.
  • the network node 110 may not be associated with the source cell or the target cell 505, or may be associated with both the source cell and the target cell 505.
  • the UE 120 may be triggered to perform PRACH transmissions to the target cell 505.
  • the network node 110 may transmit, and the UE 120 may receive, a trigger that indicates for the UE 120 to perform the PRACH transmissions to the target cell 505.
  • another device or network node may trigger the UE 120 to perform the PRACH transmissions to the target cell 505.
  • the UE 120 may receive an indication of one or more power control parameters to be used for uplink transmissions to the target cell 505.
  • the network node 110 may transmit, and the UE 120 may receive, the indication of the one or more power control parameters to be used for the uplink transmissions to the target cell 505.
  • the UE 120 may receive the indication of the one or more power control parameters after the UE 120 is triggered to perform the PRACH transmissions to the target cell 505.
  • the one or more power control parameters may be included in an RAR, such as an RAR corresponding to a transmitted PRACH.
  • the network node 110 or the target cell 505 may transmit, and the UE 120 may receive, an RAR that includes an indication of the one or more power control parameters.
  • the one or more power control parameters may be included in an LTM cell switching command.
  • the network node 110 or the target cell 505 may transmit, and the UE 120 may receive, an LTM switching command that includes an indication of the one or more power control parameters.
  • the one or more power control parameters may be included in DCI.
  • the network node 110 or the target cell 505 may transmit, and the UE 120 may receive, DCI that includes an indication of the one or more power control parameters.
  • the DCI may include an open-loop power control parameter set indication that includes the one or more power control parameters.
  • the one or more power control parameters may include one or more open-loop power control parameters.
  • Open-loop power control is a type of power control that operates without feedback from a receiver.
  • the one or more open-loop power control parameters may be, or may include, an initial power level (P0) or an alpha power level used for power boost, among other examples.
  • the one or more power control parameters may include one or more closed-loop power control parameters. Closed-loop power control is a type of power control that uses feedback from the receiver to adjust the transmit power.
  • the one or more closed-loop power control parameters may be, or may include, a virtual accumulated command value (e.g., even if a closed-loop power control command has not yet been sent or received) .
  • the one or more power control parameters may include a power boost value.
  • the UE 120 may transmit to the target cell 505 in accordance with the one or more power control parameters. For example, the UE 120 may perform a transmission to the target cell 505 using a power level that is indicated by the one or more power control parameters. As described herein, this may improve a likelihood of reception of the transmission by the target cell 505 and/or may reduce network energy resource usage by preventing transmission power levels that are higher than necessary for a successful transmission to the target cell 505.
  • the network node 110 may transmit, and the UE 120 may receive, a cell switch command which includes a beam indication for the target cell 505.
  • the UE 120 may use the indicated beam to receive the channels and/or reference signals such as UE dedicated PDCCH or PDSCH on the target cell 505 after the cell switch.
  • the beam indication in the cell switch command may indicate an TCI state index.
  • the TCI state in the cell switch command for the target cell 505 may be configured to include an SSB-index as the QCL reference signal (e.g., QCL-type D and/or QCL-type C) , where the corresponding SSB may be configured or reported in L1 measurements and associated with the PRACH transmission for the target cell 505.
  • the TCI state in the cell switch command for the target cell 505 may be configured to include a CSI-RS as the QCL reference signal, and the UE 120 may be provided with an explicit mapping between the TCI state (or the CSI-RS) and an SSB-related information which may include at least any of a downlink carrier frequency, a subcarrier spacing, a physical channel identity, and an SSB index.
  • the explicit mapping may be indicated by an RRC configuration indication, such as configured in or associated with the TCI state (or a corresponding RRC information element) which is external to the RRC configurations (e.g., ServingCellConfig) of current serving cells and external to the configuration of the LTM candidate cells, or configured in or associated with a L1 measurement RS configuration (or a corresponding SSB configuration information element) for a LTM candidate cell.
  • RRC configuration indication such as configured in or associated with the TCI state (or a corresponding RRC information element) which is external to the RRC configurations (e.g., ServingCellConfig) of current serving cells and external to the configuration of the LTM candidate cells, or configured in or associated with a L1 measurement RS configuration (or a corresponding SSB configuration information element) for a LTM candidate cell.
  • the explicit mapping may be indicated by a MAC-CE which activates the TCI state for the target cell 505.
  • the explicit mapping may be indicated by DCI.
  • the PDCCH order triggering a PRACH transmission for the target cell 505 associated with an SSB-index may be indicated in the PDCCH, where the SSB and the TCI state is explicitly mapped.
  • the SSB-related information for the TCI state may be used by the UE 120 to adjust the downlink carrier frequency, find the SSB timing, or derive the QCL-type A properties for the target cell of 120, among other examples.
  • the UE 120 may receive an explicit indicator for using SSB or CSI-RS based TCI in the cell switching command.
  • the UE 120 may use the SSB based TCI first upon receiving the cell switching command, and then switch to use CSI-RS based TCI after the configuration of target cell 505 config has been processed (e.g., after an application time from the cell switch command) .
  • Fig. 5 is provided as an example. Other examples may differ from what is described with respect to Fig. 5.
  • Fig. 6 is a diagram illustrating an example process 600 performed, for example, by a UE, in accordance with the present disclosure.
  • Example process 600 is an example where the UE (e.g., UE 120) performs operations associated with power control for uplink transmissions.
  • process 600 may include receiving, after the UE is triggered to perform physical random access channel transmissions to a target cell, an indication of one or more power control parameters to be used for uplink transmissions to the target cell (block 610) .
  • the UE e.g., using reception component 802 and/or communication manager 806, depicted in Fig. 8
  • process 600 may include transmitting to the target cell in accordance with the one or more power control parameters (block 620) .
  • the UE e.g., using transmission component 804 and/or communication manager 806, depicted in Fig. 8 may transmit to the target cell in accordance with the one or more power control parameters, as described above.
  • Process 600 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.
  • receiving the indication of the one or more power control parameters comprises dynamically receiving the indication of the one or more power control parameters from a network node.
  • receiving the indication of the one or more power control parameters comprises receiving a random access response, corresponding to a physical random access channel transmission, that includes the one or more power control parameters.
  • receiving the indication of the one or more power control parameters comprises receiving a Layer 1 or Layer 2 triggered mobility cell switching command that includes the one or more power control parameters.
  • receiving the indication of the one or more power control parameters comprises receiving downlink control information that includes the one or more power control parameters.
  • the one or more power control parameters include one or more open loop power control parameters.
  • the one or more power control parameters include one or more closed loop power control parameters.
  • the one or more power control parameters include a power boost value.
  • process 600 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 6. Additionally, or alternatively, two or more of the blocks of process 600 may be performed in parallel.
  • Fig. 7 is a diagram illustrating an example process 700 performed, for example, by a network node, in accordance with the present disclosure.
  • Example process 700 is an example where the network node (e.g., network node 110) performs operations associated with power control for uplink transmissions.
  • the network node e.g., network node 110
  • process 700 may include transmitting, after a UE is triggered to perform physical random access channel transmissions to a target cell, an indication of one or more power control parameters to be used by the UE for uplink transmissions to the target cell (block 710) .
  • the network node e.g., using transmission component 904 and/or communication manager 906, depicted in Fig. 9
  • Process 700 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.
  • the network node is included within the target cell, and process 700 includes receiving, from the UE, one or more uplink transmissions in accordance with the one or more power control parameters.
  • transmitting the indication of the one or more power control parameters comprises dynamically transmitting the indication of the one or more power control parameters to the UE.
  • transmitting the indication of the one or more power control parameters comprises transmitting a random access response, corresponding to a physical random access channel transmission, that includes the one or more power control parameters.
  • transmitting the indication of the one or more power control parameters comprises transmitting a Layer 1 or Layer 2 triggered mobility cell switching command that includes the one or more power control parameters.
  • transmitting the indication of the one or more power control parameters comprises transmitting downlink control information that includes the one or more power control parameters.
  • the one or more power control parameters include one or more open loop power control parameters.
  • the one or more power control parameters include one or more closed loop power control parameters.
  • the one or more power control parameters include a power boost value.
  • process 700 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 7. Additionally, or alternatively, two or more of the blocks of process 700 may be performed in parallel.
  • Fig. 8 is a diagram of an example apparatus 800 for wireless communication, in accordance with the present disclosure.
  • the apparatus 800 may be a UE, or a UE may include the apparatus 800.
  • the apparatus 800 includes a reception component 802, a transmission component 804, and/or a communication manager 806, which may be in communication with one another (for example, via one or more buses and/or one or more other components) .
  • the communication manager 806 is the communication manager 140 described in connection with Fig. 1.
  • the apparatus 800 may communicate with another apparatus 808, such as a UE or a network node (such as a CU, a DU, an RU, or a base station) , using the reception component 802 and the transmission component 804.
  • another apparatus 808 such as a UE or a network node (such as a CU, a DU, an RU, or a base station) , using the reception component 802 and the transmission component 804.
  • the apparatus 800 may be configured to perform one or more operations described herein in connection with Fig. 5. Additionally, or alternatively, the apparatus 800 may be configured to perform one or more processes described herein, such as process 600 of Fig. 6.
  • the apparatus 800 and/or one or more components shown in Fig. 8 may include one or more components of the UE described in connection with Fig. 2. Additionally, or alternatively, one or more components shown in Fig. 8 may be implemented within one or more components described in connection with Fig. 2. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer- readable medium and executable by a controller or a processor to perform the functions or operations of the component.
  • the reception component 802 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 808.
  • the reception component 802 may provide received communications to one or more other components of the apparatus 800.
  • the reception component 802 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components of the apparatus 800.
  • the reception component 802 may include one or more antennas, a modem, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the UE described in connection with Fig. 2.
  • the transmission component 804 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 808.
  • one or more other components of the apparatus 800 may generate communications and may provide the generated communications to the transmission component 804 for transmission to the apparatus 808.
  • the transmission component 804 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 808.
  • the transmission component 804 may include one or more antennas, a modem, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described in connection with Fig. 2. In some aspects, the transmission component 804 may be co-located with the reception component 802 in a transceiver.
  • the communication manager 806 may support operations of the reception component 802 and/or the transmission component 804. For example, the communication manager 806 may receive information associated with configuring reception of communications by the reception component 802 and/or transmission of communications by the transmission component 804. Additionally, or alternatively, the communication manager 806 may generate and/or provide control information to the reception component 802 and/or the transmission component 804 to control reception and/or transmission of communications.
  • the reception component 802 may receive, after the UE is triggered to perform physical random access channel transmissions to a target cell, an indication of one or more power control parameters to be used for uplink transmissions to the target cell.
  • the transmission component 804 may transmit to the target cell in accordance with the one or more power control parameters.
  • Fig. 8 The number and arrangement of components shown in Fig. 8 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 8. Furthermore, two or more components shown in Fig. 8 may be implemented within a single component, or a single component shown in Fig. 8 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 8 may perform one or more functions described as being performed by another set of components shown in Fig. 8.
  • Fig. 9 is a diagram of an example apparatus 900 for wireless communication, in accordance with the present disclosure.
  • the apparatus 900 may be a network node, or a network node may include the apparatus 900.
  • the apparatus 900 includes a reception component 902, a transmission component 904, and/or a communication manager 906, which may be in communication with one another (for example, via one or more buses and/or one or more other components) .
  • the communication manager 906 is the communication manager 150 described in connection with Fig. 1.
  • the apparatus 900 may communicate with another apparatus 908, such as a UE or a network node (such as a CU, a DU, an RU, or a base station) , using the reception component 902 and the transmission component 904.
  • the apparatus 900 may be configured to perform one or more operations described herein in connection with Fig. 5. Additionally, or alternatively, the apparatus 900 may be configured to perform one or more processes described herein, such as process 700 of Fig. 7.
  • the apparatus 900 and/or one or more components shown in Fig. 9 may include one or more components of the network node described in connection with Fig. 2. Additionally, or alternatively, one or more components shown in Fig. 9 may be implemented within one or more components described in connection with Fig. 2. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.
  • the reception component 902 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 908.
  • the reception component 902 may provide received communications to one or more other components of the apparatus 900.
  • the reception component 902 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components of the apparatus 900.
  • the reception component 902 may include one or more antennas, a modem, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the network node described in connection with Fig. 2.
  • the reception component 902 and/or the transmission component 904 may include or may be included in a network interface.
  • the network interface may be configured to obtain and/or output signals for the apparatus 900 via one or more communications links, such as a backhaul link, a midhaul link, and/or a fronthaul link.
  • the transmission component 904 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 908.
  • one or more other components of the apparatus 900 may generate communications and may provide the generated communications to the transmission component 904 for transmission to the apparatus 908.
  • the transmission component 904 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 908.
  • the transmission component 904 may include one or more antennas, a modem, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the network node described in connection with Fig. 2. In some aspects, the transmission component 904 may be co-located with the reception component 902 in a transceiver.
  • the communication manager 906 may support operations of the reception component 902 and/or the transmission component 904. For example, the communication manager 906 may receive information associated with configuring reception of communications by the reception component 902 and/or transmission of communications by the transmission component 904. Additionally, or alternatively, the communication manager 906 may generate and/or provide control information to the reception component 902 and/or the transmission component 904 to control reception and/or transmission of communications.
  • the transmission component 904 may transmit, after a UE is triggered to perform physical random access channel transmissions to a target cell, an indication of one or more power control parameters to be used by the UE for uplink transmissions to the target cell.
  • Fig. 9 The number and arrangement of components shown in Fig. 9 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 9. Furthermore, two or more components shown in Fig. 9 may be implemented within a single component, or a single component shown in Fig. 9 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 9 may perform one or more functions described as being performed by another set of components shown in Fig. 9.
  • a method of wireless communication performed by a user equipment (UE) comprising: receiving, after the UE is triggered to perform physical random access channel transmissions to a target cell, an indication of one or more power control parameters to be used for uplink transmissions to the target cell; and transmitting to the target cell in accordance with the one or more power control parameters.
  • UE user equipment
  • Aspect 2 The method of Aspect 1, wherein receiving the indication of the one or more power control parameters comprises dynamically receiving the indication of the one or more power control parameters from a network node.
  • Aspect 3 The method of any of Aspects 1-2, wherein receiving the indication of the one or more power control parameters comprises receiving a random access response, corresponding to a physical random access channel transmission, that includes the one or more power control parameters.
  • Aspect 4 The method of any of Aspects 1-3, wherein receiving the indication of the one or more power control parameters comprises receiving a Layer 1 or Layer 2 triggered mobility cell switching command that includes the one or more power control parameters.
  • Aspect 5 The method of any of Aspects 1-4, wherein receiving the indication of the one or more power control parameters comprises receiving downlink control information that includes the one or more power control parameters.
  • Aspect 6 The method of any of Aspects 1-5, wherein the one or more power control parameters include one or more open loop power control parameters.
  • Aspect 7 The method of any of Aspects 1-6, wherein the one or more power control parameters include one or more closed loop power control parameters.
  • Aspect 8 The method of any of Aspects 1-7, wherein the one or more power control parameters include a power boost value.
  • a method of wireless communication performed by a network node comprising: transmitting, after a user equipment (UE) is triggered to perform physical random access channel transmissions to a target cell, an indication of one or more power control parameters to be used by the UE for uplink transmissions to the target cell.
  • UE user equipment
  • Aspect 10 The method of Aspect 9, wherein the network node is included within the target cell, and wherein the method further comprises receiving, from the UE, one or more uplink transmissions in accordance with the one or more power control parameters.
  • Aspect 11 The method of any of Aspects 9-10, wherein transmitting the indication of the one or more power control parameters comprises dynamically transmitting the indication of the one or more power control parameters to the UE.
  • Aspect 12 The method of any of Aspects 9-11, wherein transmitting the indication of the one or more power control parameters comprises transmitting a random access response, corresponding to a physical random access channel transmission, that includes the one or more power control parameters.
  • Aspect 13 The method of any of Aspects 9-12, wherein transmitting the indication of the one or more power control parameters comprises transmitting a Layer 1 or Layer 2 triggered mobility cell switching command that includes the one or more power control parameters.
  • Aspect 14 The method of any of Aspects 9-13, wherein transmitting the indication of the one or more power control parameters comprises transmitting downlink control information that includes the one or more power control parameters.
  • Aspect 15 The method of any of Aspects 9-14, wherein the one or more power control parameters include one or more open loop power control parameters.
  • Aspect 16 The method of any of Aspects 9-15, wherein the one or more power control parameters include one or more closed loop power control parameters.
  • Aspect 17 The method of any of Aspects 9-16, wherein the one or more power control parameters include a power boost value.
  • Aspect 18 An apparatus for wireless communication at a device, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more of Aspects 1-17.
  • Aspect 19 A device for wireless communication, comprising a memory and one or more processors coupled to the memory, the one or more processors configured to perform the method of one or more of Aspects 1-17.
  • Aspect 20 An apparatus for wireless communication, comprising at least one means for performing the method of one or more of Aspects 1-17.
  • Aspect 21 A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more of Aspects 1-17.
  • Aspect 22 A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of Aspects 1-17.
  • the term “component” is intended to be broadly construed as hardware and/or a combination of hardware and software.
  • “Software” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and/or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • a “processor” is implemented in hardware and/or a combination of hardware and software. It will be apparent that systems and/or methods described herein may be implemented in different forms of hardware and/or a combination of hardware and software.
  • satisfying a threshold may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, or the like.
  • “at least one of: a, b, or c” is intended to cover a, b, c, a + b, a + c, b + c, and a + b + c, as well as any combination with multiples of the same element (e.g., a + a, a + a + a, a + a + b, a + a + c, a + b + b, a + c + c, b + b, b + b + b, b + b + c, c + c, and c + c + c, or any other ordering of a, b, and c) .
  • the terms “has, ” “have, ” “having, ” or the like are intended to be open-ended terms that do not limit an element that they modify (e.g., an element “having” A may also have B) .
  • the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise.
  • the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and/or, ” unless explicitly stated otherwise (e.g., if used in combination with “either” or “only one of” ) .

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

Abstract

Divers aspects de la présente divulgation concernent en général le domaine des communications sans fil. Selon certains aspects, un équipement utilisateur (UE) peut recevoir, après que l'UE a été déclenché pour effectuer des transmissions de canal d'accès aléatoire physique à une cellule cible, une indication d'un ou plusieurs paramètres de commande de puissance à utiliser pour des transmissions en liaison montante vers la cellule cible. L'UE peut transmettre à la cellule cible conformément au ou aux paramètres de commande de puissance. De nombreux autres aspects sont décrits.
PCT/CN2023/095469 2023-05-22 2023-05-22 Commande de puissance pour transmissions en liaison montante Pending WO2024239191A1 (fr)

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PCT/CN2023/095469 WO2024239191A1 (fr) 2023-05-22 2023-05-22 Commande de puissance pour transmissions en liaison montante

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PCT/CN2023/095469 WO2024239191A1 (fr) 2023-05-22 2023-05-22 Commande de puissance pour transmissions en liaison montante

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111800844A (zh) * 2019-04-01 2020-10-20 苹果公司 在5g nr中具有多个功能的可配置功率节省信号
CN114175765A (zh) * 2019-08-07 2022-03-11 中兴通讯股份有限公司 用于确定上行链路传输的功率余量的方法、装置及系统
CN114830727A (zh) * 2019-12-23 2022-07-29 高通股份有限公司 用于l1/l2中心式蜂窝小区间移动性的操作模式
CN115668852A (zh) * 2020-04-17 2023-01-31 瑞典爱立信有限公司 用于到多个传输和接收点（trp）的同时传输的方法和装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111800844A (zh) * 2019-04-01 2020-10-20 苹果公司 在5g nr中具有多个功能的可配置功率节省信号
CN114175765A (zh) * 2019-08-07 2022-03-11 中兴通讯股份有限公司 用于确定上行链路传输的功率余量的方法、装置及系统
CN114830727A (zh) * 2019-12-23 2022-07-29 高通股份有限公司 用于l1/l2中心式蜂窝小区间移动性的操作模式
CN115668852A (zh) * 2020-04-17 2023-01-31 瑞典爱立信有限公司 用于到多个传输和接收点（trp）的同时传输的方法和装置

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