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WO2025118265A1 - Synchronisation de réseau assistée par équipement utilisateur - Google Patents

Synchronisation de réseau assistée par équipement utilisateur Download PDF

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Publication number
WO2025118265A1
WO2025118265A1 PCT/CN2023/137410 CN2023137410W WO2025118265A1 WO 2025118265 A1 WO2025118265 A1 WO 2025118265A1 CN 2023137410 W CN2023137410 W CN 2023137410W WO 2025118265 A1 WO2025118265 A1 WO 2025118265A1
Authority
WO
WIPO (PCT)
Prior art keywords
reference signal
downlink
uplink
port
trps
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/CN2023/137410
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English (en)
Inventor
Jing Dai
Mostafa KHOSHNEVISAN
Xiaoxia Zhang
Shaozhen GUO
Peter Gaal
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/CN2023/137410 priority Critical patent/WO2025118265A1/fr
Publication of WO2025118265A1 publication Critical patent/WO2025118265A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver

Definitions

  • aspects of the present disclosure generally relate to wireless communication and specifically relate to techniques, apparatuses, and methods for user equipment assisted network synchronization.
  • Wireless communication systems are widely deployed to provide various services that may include carrying voice, text, messaging, video, data, and/or other traffic.
  • the services may include unicast, multicast, and/or broadcast services, among other examples.
  • Typical wireless communication systems may employ multiple-access radio access technologies (RATs) capable of supporting communication with multiple users by sharing available system resources (for example, time domain resources, frequency domain resources, spatial domain resources, and/or device transmit power, among other examples) .
  • RATs radio access technologies
  • multiple-access RATs 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, and time division synchronous code division multiple access (TD-SCDMA) systems.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • TD-SCDMA time division synchronous code division multiple access
  • NR New Radio
  • 5G New Radio
  • 3GPP Third Generation Partnership Project
  • NR may be designed to better support Internet of things (IoT) and reduced capability device deployments, industrial connectivity, millimeter wave (mmWave) expansion, licensed and unlicensed spectrum access, non-terrestrial network (NTN) deployment, sidelink and other device-to-device direct communication technologies (for example, cellular vehicle-to-everything (CV2X) communication) , massive multiple-input multiple-output (MIMO) , disaggregated network architectures and network topology expansions, multiple-subscriber implementations, high-precision positioning, and/or radio frequency (RF) sensing, among other examples.
  • IoT Internet of things
  • mmWave millimeter wave
  • NTN non-terrestrial network
  • CV2X massive multiple-input multiple-output
  • MIMO massive multiple-input multiple-output
  • disaggregated network architectures and network topology expansions multiple-subscriber implementations
  • RF radio frequency
  • 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, from a plurality of transmission reception points (TRPs) , a plurality of downlink reference signals, wherein each downlink reference signal is associated with a respective TRP of the plurality of TRPs.
  • TRPs transmission reception points
  • the one or more processors may be configured to transmit a plurality of uplink reference signals, wherein each uplink reference signal is precoded in association with a respective downlink reference signal of the plurality of downlink reference signals, and wherein at least one of the plurality of downlink reference signals or the plurality of uplink reference signals comprises at least one multi-port reference signal, wherein, the plurality of uplink reference signals are configured to facilitate a determination, at a network node, of at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • the network node 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 transmit, using a plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a respective TRP of the plurality of TRPs.
  • the one or more processors may be configured to receive, from a UE, a plurality of uplink reference signals, wherein each uplink reference signal is precoded in association with a respective downlink reference signal of the plurality of downlink reference signals, and wherein at least one of the plurality of downlink reference signals or the plurality of uplink reference signals comprises at least one multi-port reference signal.
  • the one or more processors may be configured to determine, based on the plurality of uplink reference signals, at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • the user equipment 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 transmit, to a plurality of TRPs, an uplink reference signal.
  • the one or more processors may be configured to receive, from the plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a TRP of the plurality of TRPs and is precoded in association with the uplink reference signal, and wherein at least one of the uplink reference signal or the plurality of downlink reference signals comprises at least one multi-port reference signal.
  • the one or more processors may be configured to determine, based on the plurality of downlink reference signals, at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • the one or more processors may be configured to transmit, to a network node, reporting information indicative of the at least one of the timing offset or the phase offset.
  • the network node 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, from a UE and using a plurality of TRPs, an uplink reference signal.
  • the one or more processors may be configured to transmit, using the plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a TRP of the plurality of TRPs and is precoded in association with the uplink reference signal, and wherein at least one of the uplink reference signal or the plurality of downlink reference signals comprises at least one multi-port reference signal.
  • the one or more processors may be configured to receive reporting information indicative of the at least one of a timing offset or a phase offset.
  • the method may include receiving, from a plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a respective TRP of the plurality of TRPs.
  • the method may include transmitting a plurality of uplink reference signals, wherein each uplink reference signal is precoded in association with a respective downlink reference signal of the plurality of downlink reference signals, and wherein at least one of the plurality of downlink reference signals or the plurality of uplink reference signals comprises at least one multi-port reference signal, wherein, the plurality of uplink reference signals are configured to facilitate a determination, at a network node, of at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • the method may include transmitting, using a plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a respective TRP of the plurality of TRPs.
  • the method may include receiving, from a UE, a plurality of uplink reference signals, wherein each uplink reference signal is precoded in association with a respective downlink reference signal of the plurality of downlink reference signals, and wherein at least one of the plurality of downlink reference signals or the plurality of uplink reference signals comprises at least one multi-port reference signal.
  • the method may include determining, based on the plurality of uplink reference signals, at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • the method may include transmitting, to a plurality of TRPs, an uplink reference signal.
  • the method may include receiving, from the plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a TRP of the plurality of TRPs and is precoded in association with the uplink reference signal, and wherein at least one of the uplink reference signal or the plurality of downlink reference signals comprises at least one multi-port reference signal.
  • the method may include determining, based on the plurality of downlink reference signals, at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • the method may include transmitting, to a network node, reporting information indicative of the at least one of the timing offset or the phase offset.
  • the method may include receiving, from a UE and using a plurality of TRPs, an uplink reference signal.
  • the method may include transmitting, using the plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a TRP of the plurality of TRPs and is precoded in association with the uplink reference signal, and wherein at least one of the uplink reference signal or the plurality of downlink reference signals comprises at least one multi-port reference signal.
  • the method may include receiving reporting information indicative of the at least one of a timing offset or a phase offset.
  • 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, from a plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a respective TRP of the plurality of TRPs.
  • the set of instructions when executed by one or more processors of the UE, may cause the UE to transmit a plurality of uplink reference signals, wherein each uplink reference signal is precoded in association with a respective downlink reference signal of the plurality of downlink reference signals, and wherein at least one of the plurality of downlink reference signals or the plurality of uplink reference signals comprises at least one multi-port reference signal, wherein, the plurality of uplink reference signals are configured to facilitate a determination, at a network node, of at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • 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, using a plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a respective TRP of the plurality of TRPs.
  • the set of instructions when executed by one or more processors of the network node, may cause the network node to receive, from a UE, a plurality of uplink reference signals, wherein each uplink reference signal is precoded in association with a respective downlink reference signal of the plurality of downlink reference signals, and wherein at least one of the plurality of downlink reference signals or the plurality of uplink reference signals comprises at least one multi-port reference signal.
  • the set of instructions when executed by one or more processors of the network node, may cause the network node to determine, based on the plurality of uplink reference signals, at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by an UE.
  • the set of instructions when executed by one or more processors of the UE, may cause the UE to transmit, to a plurality of TRPs, an uplink reference signal.
  • the set of instructions when executed by one or more processors of the UE, may cause the UE to receive, from the plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a TRP of the plurality of TRPs and is precoded in association with the uplink reference signal, and wherein at least one of the uplink reference signal or the plurality of downlink reference signals comprises at least one multi-port reference signal.
  • the set of instructions when executed by one or more processors of the UE, may cause the UE to determine, based on the plurality of downlink reference signals, at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • the set of instructions when executed by one or more processors of the UE, may cause the UE to transmit, to a network node, reporting information indicative of the at least one of the timing offset or the phase offset.
  • 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 receive, from a UE and using a plurality of TRPs, an uplink reference signal.
  • the set of instructions when executed by one or more processors of the network node, may cause the network node to transmit, using the plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a TRP of the plurality of TRPs and is precoded in association with the uplink reference signal, and wherein at least one of the uplink reference signal or the plurality of downlink reference signals comprises at least one multi-port reference signal.
  • the set of instructions when executed by one or more processors of the network node, may cause the network node to receive reporting information indicative of the at least one of a timing offset or a phase offset.
  • the apparatus may include means for receiving, from a plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a respective TRP of the plurality of TRPs.
  • the apparatus may include means for transmitting a plurality of uplink reference signals, wherein each uplink reference signal is precoded in association with a respective downlink reference signal of the plurality of downlink reference signals, and wherein at least one of the plurality of downlink reference signals or the plurality of uplink reference signals comprises at least one multi-port reference signal, wherein, the plurality of uplink reference signals are configured to facilitate a determination, at a network node, of at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • the apparatus may include means for transmitting, using a plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a respective TRP of the plurality of TRPs.
  • the apparatus may include means for receiving, from a UE, a plurality of uplink reference signals, wherein each uplink reference signal is precoded in association with a respective downlink reference signal of the plurality of downlink reference signals, and wherein at least one of the plurality of downlink reference signals or the plurality of uplink reference signals comprises at least one multi-port reference signal.
  • the apparatus may include means for determining, based on the plurality of uplink reference signals, at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • the apparatus may include means for transmitting, to a plurality of TRPs, an uplink reference signal.
  • the apparatus may include means for receiving, from the plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a TRP of the plurality of TRPs and is precoded in association with the uplink reference signal, and wherein at least one of the uplink reference signal or the plurality of downlink reference signals comprises at least one multi-port reference signal.
  • the apparatus may include means for determining, based on the plurality of downlink reference signals, at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • the apparatus may include means for transmitting, to a network node, reporting information indicative of the at least one of the timing offset or the phase offset.
  • the apparatus may include means for receiving, from a UE and using a plurality of TRPs, an uplink reference signal.
  • the apparatus may include means for transmitting, using the plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a TRP of the plurality of TRPs and is precoded in association with the uplink reference signal, and wherein at least one of the uplink reference signal or the plurality of downlink reference signals comprises at least one multi-port reference signal.
  • the apparatus may include means for receiving reporting information indicative of the at least one of a timing offset or a phase offset.
  • aspects of the present disclosure may generally be implemented by or as a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, network node, network entity, wireless communication device, and/or processing system as substantially described with reference to, and as illustrated by, the specification and accompanying drawings.
  • Fig. 1 is a diagram illustrating an example of a wireless communication network in accordance with the present disclosure.
  • Fig. 2 is a diagram illustrating an example network node in communication with an example 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 of an example associated with network synchronization, in accordance with the present disclosure.
  • Fig. 5 is a diagram of an example associated with network synchronization, in accordance with the present disclosure.
  • Fig. 6 is a diagram of an example associated with UE assisted network synchronization, in accordance with the present disclosure.
  • Figs. 7A and 7B are diagrams of examples associated with UE assisted network synchronization, in accordance with the present disclosure.
  • Fig. 8 is a diagram illustrating an example process performed, for example, at a UE or an apparatus of a UE, in accordance with the present disclosure.
  • Fig. 9 is a diagram illustrating an example process performed, for example, at a network node or an apparatus of a network node, in accordance with the present disclosure.
  • Fig. 10 is a diagram illustrating an example process performed, for example, at a UE or an apparatus of a UE, in accordance with the present disclosure.
  • Fig. 11 is a diagram illustrating an example process performed, for example, at a network node or an apparatus of a network node, in accordance with the present disclosure.
  • Fig. 12 is a diagram of an example apparatus for wireless communication, in accordance with the present disclosure.
  • Fig. 13 is a diagram of an example apparatus for wireless communication, in accordance with the present disclosure.
  • a user equipment may communicate with multiple transmission reception points (TRPs) .
  • TRPs transmission reception points
  • the multiple TRPs may synchronize with one another from a timing and/or phase perspective.
  • a first process may be used in which a UE receives a downlink reference signal (DL-RS) from each TRP and transmits, to each TRP, a corresponding uplink reference signal (UL-RS) .
  • the UE can precode the UL-RSs based on information associated with the DL-RSs.
  • DL-RS downlink reference signal
  • UL-RS uplink reference signal
  • a network node associated with the TRPs can determine a timing offset and/or a phase offset and indicate the same to one or more of the TRPs, which can use the indicated timing offset and/or phase offset to synchronize with the other TRP or TRPs.
  • the UE can transmit a single UL-RS to be received by the multiple TRPs.
  • Each TRP can transmit a DL-RS precoded using information associated with the UL-RS and the UE can use the DL-RSs to determine the timing offset and/or the phase offset.
  • the UE can indicate the timing offset and/or the phase offset to one or more of the TRPs to facilitate TRP-level synchronization.
  • Various aspects relate generally to UE assisted network synchronization. Some aspects more specifically relate to panel-level synchronization, port-level synchronization, and/or antenna-level synchronization across TRPs (e.g., to provide richer functionalities) . Some aspects described herein may utilize a multi-port DL-RS for a TRP with multiple antenna panels. To enhance synchronization performance by antenna diversity (e.g. to choose an antenna of the UE and/or a TRP with higher SNR from multiple paths) , multi-port UL-RS and/or multi-port DL-RS may be used.
  • multi-port UL-RS and/or multi-port DL-RS may be used in a first case (e.g., “case (x) ” ) in which the UE includes multiple antennas (e.g., A>1) , a second case (e.g., “case (y) ” ) in which the TRP (s) include multiple antennas (e.g., P>1) , and/or a third case (e.g., a combination of case (x) and case (y) ) in which A>1 and P>1.
  • the described techniques can be used to enable a UE to more efficiently communicate with multiple TRPs due to the panel-level synchronization across the TRPs. As a result, some aspects may positively impact network performance and/or device performance.
  • 5G New Radio is part of a continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) .
  • 3GPP Third Generation Partnership Project
  • 5G NR supports various technologies and use cases including enhanced mobile broadband (eMBB) , ultra-reliable low-latency communication (URLLC) , massive machine-type communication (mMTC) , millimeter wave (mmWave) technology, beamforming, network slicing, edge computing, Internet of Things (IoT) connectivity and management, and network function virtualization (NFV) .
  • eMBB enhanced mobile broadband
  • URLLC ultra-reliable low-latency communication
  • mMTC massive machine-type communication
  • mmWave millimeter wave
  • beamforming network slicing
  • edge computing Internet of Things (IoT) connectivity and management
  • NFV network function virtualization
  • Such technological improvements may be associated with new frequency band expansion, licensed and unlicensed spectrum access, overlapping spectrum use, small cell deployments, non-terrestrial network (NTN) deployments, disaggregated network architectures and network topology expansion, device aggregation, advanced duplex communication, sidelink and other device-to-device direct communication, IoT (including passive or ambient IoT) networks, reduced capability (RedCap) UE functionality, industrial connectivity, multiple-subscriber implementations, high-precision positioning, radio frequency (RF) sensing, and/or artificial intelligence or machine learning (AI/ML) , among other examples.
  • NTN non-terrestrial network
  • disaggregated network architectures and network topology expansion device aggregation
  • advanced duplex communication including passive or ambient IoT
  • RedCap reduced capability
  • industrial connectivity multiple-subscriber implementations
  • high-precision positioning radio frequency (RF) sensing
  • AI/ML artificial intelligence or machine learning
  • These technological improvements may support use cases such as wireless backhauls, wireless data centers, extended reality (XR) and metaverse applications, meta services for supporting vehicle connectivity, holographic and mixed reality communication, autonomous and collaborative robots, vehicle platooning and cooperative maneuvering, sensing networks, gesture monitoring, human-brain interfacing, digital twin applications, asset management, and universal coverage applications using non-terrestrial and/or aerial platforms, among other examples.
  • use cases such as wireless backhauls, wireless data centers, extended reality (XR) and metaverse applications, meta services for supporting vehicle connectivity, holographic and mixed reality communication, autonomous and collaborative robots, vehicle platooning and cooperative maneuvering, sensing networks, gesture monitoring, human-brain interfacing, digital twin applications, asset management, and universal coverage applications using non-terrestrial and/or aerial platforms, among other examples.
  • XR extended reality
  • metaverse applications meta services for supporting vehicle connectivity
  • holographic and mixed reality communication autonomous and collaborative robots
  • vehicle platooning and cooperative maneuvering sensing networks
  • gesture monitoring human-bra
  • Fig. 1 is a diagram illustrating an example of a wireless communication network 100 in accordance with the present disclosure.
  • the wireless communication network 100 may be or may include elements of a 5G (or NR) network or a 6G network, among other examples.
  • the wireless communication network 100 may include multiple network nodes 110, shown as a network node (NN) 110a, a network node 110b, a network node 110c, and a network node 110d.
  • the network nodes 110 may support communications with multiple UEs 120, shown as a UE 120a, a UE 120b, a UE 120c, a UE 120d, and a UE 120e.
  • the network nodes 110 and the UEs 120 of the wireless communication network 100 may communicate using the electromagnetic spectrum, which may be subdivided by frequency or wavelength into various classes, bands, carriers, and/or channels. For example, devices of the wireless communication network 100 may communicate using one or more operating bands.
  • multiple wireless networks 100 may be deployed in a given geographic area.
  • Each wireless communication network 100 may support a particular radio access technology (RAT) (which may also be referred to as an air interface) and may operate on one or more carrier frequencies in one or more frequency ranges.
  • RATs include a 4G RAT, a 5G/NR RAT, and/or a 6G RAT, among other examples.
  • each RAT in the geographic area may operate on different frequencies to avoid interference with one another.
  • FR1 frequency range designations FR1 (410 MHz through 7.125 GHz) , FR2 (24.25 GHz through 52.6 GHz) , FR3 (7.125 GHz through 24.25 GHz) , FR4a or FR4-1 (52.6 GHz through 71 GHz) , FR4 (52.6 GHz through 114.25 GHz) , and FR5 (114.25 GHz through 300 GHz) .
  • FR1 is often referred to (interchangeably) as a “Sub-6 GHz” band in some documents and articles.
  • FR2 is often referred to (interchangeably) as a “millimeter wave” band in some documents and articles, despite being different than the extremely high frequency (EHF) band (30 GHz through 300 GHz) , which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.
  • EHF extremely high frequency
  • ITU International Telecommunications Union
  • the frequencies between FR1 and FR2 are often referred to as mid-band frequencies, which include FR3.
  • Frequency bands falling within FR3 may inherit FR1 characteristics or FR2 characteristics, and thus may effectively extend features of FR1 or FR2 into mid-band frequencies.
  • sub-6 GHz may broadly refer to frequencies that are less than 6 GHz, that are within FR1, and/or that are included in mid-band frequencies.
  • millimeter wave if used herein, may broadly refer to frequencies that are included in mid-band frequencies, that are within FR2, FR4, FR4-a or FR4-1, or FR5, and/or that are within the EHF band.
  • Higher frequency bands may extend 5G NR operation, 6G operation, and/or other RATs beyond 52.6 GHz.
  • each of FR4a, FR4-1, FR4, and FR5 falls within the EHF band.
  • the wireless communication network 100 may implement dynamic spectrum sharing (DSS) , in which multiple RATs (for example, 4G/LTE and 5G/NR) are implemented with dynamic bandwidth allocation (for example, based on user demand) in a single frequency band.
  • DSS dynamic spectrum sharing
  • multiple RATs for example, 4G/LTE and 5G/NR
  • dynamic bandwidth allocation for example, based on user demand
  • a network node 110 may include one or more devices, components, or systems that enable communication between a UE 120 and one or more devices, components, or systems of the wireless communication network 100.
  • a network node 110 may be, may include, or may also be referred to as an NR network node, a 5G network node, a 6G network node, a Node B, an eNB, a gNB, an access point (AP) , a transmission reception point (TRP) , a mobility element, a core, a network entity, a network element, a network equipment, and/or another type of device, component, or system included in a radio access network (RAN) .
  • RAN radio access network
  • a network node 110 may be implemented as a single physical node (for example, a single physical structure) or may be implemented as two or more physical nodes (for example, two or more distinct physical structures) .
  • a network node 110 may be a device or system that implements part of a radio protocol stack, a device or system that implements a full radio protocol stack (such as a full gNB protocol stack) , or a collection of devices or systems that collectively implement the full radio protocol stack.
  • a network node 110 may be an aggregated network node (having an aggregated architecture) , meaning that the network node 110 may implement a full radio protocol stack that is physically and logically integrated within a single node (for example, a single physical structure) in the wireless communication network 100.
  • an aggregated network node 110 may consist of a single standalone base station or a single TRP that uses a full radio protocol stack to enable or facilitate communication between a UE 120 and a core network of the wireless communication network 100.
  • a network node 110 may be a disaggregated network node (sometimes referred to as a disaggregated base station) , meaning that the network node 110 may implement a radio protocol stack that is physically distributed and/or logically distributed among two or more nodes in the same geographic location or in different geographic locations.
  • a disaggregated network node may have a disaggregated architecture.
  • disaggregated network nodes 110 may be used in an integrated access and backhaul (IAB) network, in an open radio access network (O-RAN) (such as a network configuration in compliance with the O-RAN Alliance) , or in a virtualized radio access network (vRAN) , also known as a cloud radio access network (C-RAN) , to facilitate scaling by separating base station functionality into multiple units that can be individually deployed.
  • IAB integrated access and backhaul
  • O-RAN open radio access network
  • vRAN virtualized radio access network
  • C-RAN cloud radio access network
  • the network nodes 110 of the wireless communication network 100 may include one or more central units (CUs) , one or more distributed units (DUs) , and/or one or more radio units (RUs) .
  • a CU may host one or more higher layer control functions, such as radio resource control (RRC) functions, packet data convergence protocol (PDCP) functions, and/or service data adaptation protocol (SDAP) functions, among other examples.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • SDAP service data adaptation protocol
  • a DU may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and/or one or more higher physical (PHY) layers depending, at least in part, on a functional split, such as a functional split defined by the 3GPP.
  • RLC radio link control
  • MAC medium access control
  • PHY physical
  • a DU also may host one or more lower PHY layer functions, such as a fast Fourier transform (FFT) , an inverse FFT (iFFT) , beamforming, physical random access channel (PRACH) extraction and filtering, and/or scheduling of resources for one or more UEs 120, among other examples.
  • An RU may host RF processing functions or lower PHY layer functions, such as an FFT, an iFFT, beamforming, or PRACH extraction and filtering, among other examples, according to a functional split, such as a lower layer functional split.
  • each RU can be operated to handle over the air (OTA) communication with one or more UEs 120.
  • OTA over the air
  • a single network node 110 may include a combination of one or more CUs, one or more DUs, and/or one or more RUs. Additionally or alternatively, a network node 110 may include one or more Near-Real Time (Near-RT) RAN Intelligent Controllers (RICs) and/or one or more Non-Real Time (Non-RT) RICs.
  • a CU, a DU, and/or an RU may be implemented as a virtual unit, such as a virtual central unit (VCU) , a virtual distributed unit (VDU) , or a virtual radio unit (VRU) , among other examples.
  • a virtual unit may be implemented as a virtual network function, such as associated with a cloud deployment.
  • Some network nodes 110 may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a network node 110 or to a network node 110 itself, depending on the context in which the term is used.
  • a network node 110 may support one or multiple (for example, three) cells.
  • a network node 110 may provide communication coverage for a macro cell, a pico cell, a femto cell, or another type of cell.
  • a macro cell may cover a relatively large geographic area (for example, 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 (for example, a home) and may allow restricted access by UEs 120 having association with the femto cell (for example, 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.
  • a cell may not necessarily be stationary.
  • the geographic area of the cell may move according to the location of an associated mobile network node 110 (for example, a train, a satellite base station, an unmanned aerial vehicle, or a non-terrestrial network (NTN) network node) .
  • an associated mobile network node 110 for example, a train, a satellite base station, an unmanned aerial vehicle, or a non-terrestrial network (NTN) network node.
  • NTN non-terrestrial network
  • the wireless communication 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, aggregated network nodes, and/or disaggregated network nodes, among other examples.
  • the network node 110a may be a macro network node for a macro cell 130a
  • the network node 110b may be a pico network node for a pico cell 130b
  • the network node 110c may be a femto network node for a femto cell 130c.
  • network nodes 110 may generally transmit at different power levels, serve different coverage areas, and/or have different impacts on interference in the wireless communication network 100 than other types of network nodes 110.
  • macro network nodes may have a high transmit power level (for example, 5 to 40 watts)
  • pico network nodes, femto network nodes, and relay network nodes may have lower transmit power levels (for example, 0.1 to 2 watts) .
  • a network node 110 may be, may include, or may operate as an RU, a TRP, or a base station that communicates with one or more UEs 120 via a radio access link (which may be referred to as a “Uu” link) .
  • the radio access link may include a downlink and an uplink.
  • Downlink (or “DL” ) refers to a communication direction from a network node 110 to a UE 120
  • uplink or “UL”
  • Downlink channels may include one or more control channels and one or more data channels.
  • a downlink control channel may be used to transmit downlink control information (DCI) (for example, scheduling information, reference signals, and/or configuration information) from a network node 110 to a UE 120.
  • DCI downlink control information
  • a downlink data channel may be used to transmit downlink data (for example, user data associated with a UE 120) from a network node 110 to a UE 120.
  • Downlink control channels may include one or more physical downlink control channels (PDCCHs)
  • downlink data channels may include one or more physical downlink shared channels (PDSCHs) .
  • Uplink channels may similarly include one or more control channels and one or more data channels.
  • An uplink control channel may be used to transmit uplink control information (UCI) (for example, reference signals and/or feedback corresponding to one or more downlink transmissions) from a UE 120 to a network node 110.
  • UCI uplink control information
  • An uplink data channel may be used to transmit uplink data (for example, user data associated with a UE 120) from a UE 120 to a network node 110.
  • Uplink control channels may include one or more physical uplink control channels (PUCCHs)
  • uplink data channels may include one or more physical uplink shared channels (PUSCHs) .
  • the downlink and the uplink may each include a set of resources on which the network node 110 and the UE 120 may communicate.
  • Downlink and uplink resources may include time domain resources (frames, subframes, slots, and/or symbols) , frequency domain resources (frequency bands, component carriers, subcarriers, resource blocks, and/or resource elements) , and/or spatial domain resources (particular transmit directions and/or beam parameters) .
  • Frequency domain resources of some bands may be subdivided into bandwidth parts (BWPs) .
  • a BWP may be a continuous block of frequency domain resources (for example, a continuous block of resource blocks) that are allocated for one or more UEs 120.
  • a UE 120 may be configured with both an uplink BWP and a downlink BWP (where the uplink BWP and the downlink BWP may be the same BWP or different BWPs) .
  • a BWP may be dynamically configured (for example, by a network node 110 transmitting a DCI configuration to the one or more UEs 120) and/or reconfigured, which means that a BWP can be adjusted in real-time (or near-real-time) based on changing network conditions in the wireless communication network 100 and/or based on the specific requirements of the one or more UEs 120.
  • This enables more efficient use of the available frequency domain resources in the wireless communication network 100 because fewer frequency domain resources may be allocated to a BWP for a UE 120 (which may reduce the quantity of frequency domain resources that a UE 120 is required to monitor) , leaving more frequency domain resources to be spread across multiple UEs 120.
  • BWPs may also assist in the implementation of lower-capability UEs 120 by facilitating the configuration of smaller bandwidths for communication by such UEs 120.
  • the wireless communication network 100 may be, may include, or may be included in, an IAB network.
  • at least one network node 110 is an anchor network node that communicates with a core network.
  • An anchor network node 110 may also be referred to as an IAB donor (or “IAB-donor” ) .
  • the anchor network node 110 may connect to the core network via a wired backhaul link.
  • an Ng interface of the anchor network node 110 may terminate at the core network.
  • an anchor network node 110 may connect to one or more devices of the core network that provide a core access and mobility management function (AMF) .
  • AMF core access and mobility management function
  • An IAB network also generally includes multiple non-anchor network nodes 110, which may also be referred to as relay network nodes or simply as IAB nodes (or “IAB-nodes” ) .
  • Each non-anchor network node 110 may communicate directly with the anchor network node 110 via a wireless backhaul link to access the core network, or may communicate indirectly with the anchor network node 110 via one or more other non-anchor network nodes 110 and associated wireless backhaul links that form a backhaul path to the core network.
  • Some anchor network node 110 or other non-anchor network node 110 may also communicate directly with one or more UEs 120 via wireless access links that carry access traffic.
  • network resources for wireless communication (such as time resources, frequency resources, and/or spatial resources) may be shared between access links and backhaul links.
  • any network node 110 that relays communications may be referred to as a relay network node, a relay station, or simply as a relay.
  • a relay may receive a transmission of a communication from an upstream station (for example, another network node 110 or a UE 120) and transmit the communication to a downstream station (for example, a UE 120 or another network node 110) .
  • the wireless communication network 100 may include or be referred to as a “multi-hop network. ” In the example shown in Fig.
  • the network node 110d may communicate with the network node 110a (for example, a macro network node) and the UE 120d in order to facilitate communication between the network node 110a and the UE 120d.
  • a UE 120 may be or may operate as a relay station that can relay transmissions to or from other UEs 120.
  • a UE 120 that relays communications may be referred to as a UE relay or a relay UE, among other examples.
  • the UEs 120 may be physically dispersed throughout the wireless communication network 100, and each UE 120 may be stationary or mobile.
  • a UE 120 may be, may include, or may be included in an access terminal, another terminal, a mobile station, or a subscriber unit.
  • a UE 120 may be, include, or be coupled with a cellular phone (for example, 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 (for example, a smart watch, smart clothing, smart glasses, a smart wristband, and/or smart jewelry, such as a smart ring or a smart bracelet) , an entertainment device (for example, a music device, a video device, and/or a satellite
  • a UE 120 and/or a network node 110 may include one or more chips, system-on-chips (SoCs) , chipsets, packages, or devices that individually or collectively constitute or comprise a processing system.
  • the processing system includes processor (or “processing” ) circuitry in the form of one or multiple processors, microprocessors, processing units (such as central processing units (CPUs) , graphics processing units (GPUs) , neural processing units (NPUs) and/or digital signal processors (DSPs) ) , processing blocks, application-specific integrated circuits (ASIC) , programmable logic devices (PLDs) (such as field programmable gate arrays (FPGAs) ) , or other discrete gate or transistor logic or circuitry (all of which may be generally referred to herein individually as “processors” or collectively as “the processor” or “the processor circuitry” ) .
  • processors or “processing” circuitry in the form of one or multiple processors, microprocessors
  • One or more of the processors may be individually or collectively configurable or configured to perform various functions or operations described herein.
  • a group of processors collectively configurable or configured to perform a set of functions may include a first processor configurable or configured to perform a first function of the set and a second processor configurable or configured to perform a second function of the set, or may include the group of processors all being configured or configurable to perform the set of functions.
  • the processing system may further include memory circuitry in the form of one or more memory devices, memory blocks, memory elements or other discrete gate or transistor logic or circuitry, each of which may include tangible storage media such as random-access memory (RAM) or read-only memory (ROM) , or combinations thereof (all of which may be generally referred to herein individually as “memories” or collectively as “the memory” or “the memory circuitry” ) .
  • RAM random-access memory
  • ROM read-only memory
  • One or more of the memories may be coupled (for example, operatively coupled, communicatively coupled, electronically coupled, or electrically coupled) with one or more of the processors and may individually or collectively store processor-executable code (such as software) that, when executed by one or more of the processors, may configure one or more of the processors to perform various functions or operations described herein. Additionally or alternatively, in some examples, one or more of the processors may be preconfigured to perform various functions or operations described herein without requiring configuration by software.
  • the processing system may further include or be coupled with one or more modems (such as a Wi-Fi (for example, IEEE compliant) modem or a cellular (for example, 3GPP 4G LTE, 5G, or 6G compliant) modem) .
  • modems such as a Wi-Fi (for example, IEEE compliant) modem or a cellular (for example, 3GPP 4G LTE, 5G, or 6G compliant) modem
  • one or more processors of the processing system include or implement one or more of the modems.
  • the processing system may further include or be coupled with multiple radios (collectively “the radio” ) , multiple RF chains, or multiple transceivers, each of which may in turn be coupled with one or more of multiple antennas.
  • one or more processors of the processing system include or implement one or more of the radios, RF chains or transceivers.
  • the UE 120 may include or may be included in a housing that houses components associated with the UE 120 including the processing system.
  • Some UEs 120 may be considered machine-type communication (MTC) UEs, evolved or enhanced machine-type communication (eMTC) , UEs, further enhanced eMTC (feMTC) UEs, or enhanced feMTC (efeMTC) UEs, or further evolutions thereof, all of which may be simply referred to as “MTC UEs” ) .
  • An MTC UE may be, may include, or may be included in or coupled with a robot, an uncrewed aerial vehicle, a remote device, a sensor, a meter, a monitor, and/or a location tag.
  • Some UEs 120 may be considered IoT devices and/or may be implemented as NB-IoT (narrowband IoT) devices.
  • An IoT UE or NB-IoT device may be, may include, or may be included in or coupled with an industrial machine, an appliance, a refrigerator, a doorbell camera device, a home automation device, and/or a light fixture, among other examples.
  • Some UEs 120 may be considered Customer Premises Equipment, which may include telecommunications devices that are installed at a customer location (such as a home or office) to enable access to a service provider's network (such as included in or in communication with the wireless communication network 100) .
  • Some UEs 120 may be classified according to different categories in association with different complexities and/or different capabilities.
  • UEs 120 in a first category may facilitate massive IoT in the wireless communication network 100, and may offer low complexity and/or cost relative to UEs 120 in a second category.
  • UEs 120 in a second category may include mission-critical IoT devices, legacy UEs, baseline UEs, high-tier UEs, advanced UEs, full-capability UEs, and/or premium UEs that are capable of ultra-reliable low-latency communication (URLLC) , enhanced mobile broadband (eMBB) , and/or precise positioning in the wireless communication network 100, among other examples.
  • URLLC ultra-reliable low-latency communication
  • eMBB enhanced mobile broadband
  • a third category of UEs 120 may have mid-tier complexity and/or capability (for example, a capability between UEs 120 of the first category and UEs 120 of the second capability) .
  • a UE 120 of the third category may be referred to as a reduced capacity UE ( “RedCap UE” ) , a mid-tier UE, an NR-Light UE, and/or an NR-Lite UE, among other examples.
  • RedCap UEs may bridge a gap between the capability and complexity of NB-IoT devices and/or eMTC UEs, and mission-critical IoT devices and/or premium UEs.
  • RedCap UEs may include, for example, wearable devices, IoT devices, industrial sensors, and/or cameras that are associated with a limited bandwidth, power capacity, and/or transmission range, among other examples.
  • RedCap UEs may support healthcare environments, building automation, electrical distribution, process automation, transport and logistics, and/or smart city deployments, among other examples.
  • two or more UEs 120 may communicate directly with one another using sidelink communications (for example, without communicating by way of a network node 110 as an intermediary) .
  • the UE 120a may directly transmit data, control information, or other signaling as a sidelink communication to the UE 120e. This is in contrast to, for example, the UE 120a first transmitting data in an UL communication to a network node 110, which then transmits the data to the UE 120e in a DL communication.
  • the UEs 120 may transmit and receive sidelink communications using peer-to-peer (P2P) communication protocols, device-to-device (D2D) communication protocols, vehicle-to-everything (V2X) communication protocols (which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, and/or vehicle-to-pedestrian (V2P) protocols) , and/or mesh network communication protocols.
  • a network node 110 may schedule and/or allocate resources for sidelink communications between UEs 120 in the wireless communication network 100.
  • a UE 120 (instead of a network node 110) may perform, or collaborate or negotiate with one or more other UEs to perform, scheduling operations, resource selection operations, and/or other operations for sidelink communications.
  • some of the network nodes 110 and the UEs 120 of the wireless communication network 100 may be configured for full-duplex operation in addition to half-duplex operation.
  • a network node 110 or a UE 120 operating in a half-duplex mode may perform only one of transmission or reception during particular time resources, such as during particular slots, symbols, or other time periods.
  • Half-duplex operation may involve time-division duplexing (TDD) , in which DL transmissions of the network node 110 and UL transmissions of the UE 120 do not occur in the same time resources (that is, the transmissions do not overlap in time) .
  • TDD time-division duplexing
  • a network node 110 or a UE 120 operating in a full-duplex mode can transmit and receive communications concurrently (for example, in the same time resources) .
  • network nodes 110 and/or UEs 120 may generally increase the capacity of the network and the radio access link.
  • full-duplex operation may involve frequency-division duplexing (FDD) , in which DL transmissions of the network node 110 are performed in a first frequency band or on a first component carrier and transmissions of the UE 120 are performed in a second frequency band or on a second component carrier different than the first frequency band or the first component carrier, respectively.
  • FDD frequency-division duplexing
  • full-duplex operation may be enabled for a UE 120 but not for a network node 110.
  • a UE 120 may simultaneously transmit an UL transmission to a first network node 110 and receive a DL transmission from a second network node 110 in the same time resources.
  • full-duplex operation may be enabled for a network node 110 but not for a UE 120.
  • a network node 110 may simultaneously transmit a DL transmission to a first UE 120 and receive an UL transmission from a second UE 120 in the same time resources.
  • full-duplex operation may be enabled for both a network node 110 and a UE 120.
  • the UEs 120 and the network nodes 110 may perform MIMO communication.
  • MIMO generally refers to transmitting or receiving multiple signals (such as multiple layers or multiple data streams) simultaneously over the same time and frequency resources. MIMO techniques generally exploit multipath propagation. MIMO may be implemented using various spatial processing or spatial multiplexing operations. In some examples, MIMO may support simultaneous transmission to multiple receivers, referred to as multi-user MIMO (MU-MIMO) .
  • MU-MIMO multi-user MIMO
  • Some radio access technologies (RATs) may employ advanced MIMO techniques, such as mTRP operation (including redundant transmission or reception on multiple TRPs) , reciprocity in the time domain or the frequency domain, single-frequency-network (SFN) transmission, or non-coherent joint transmission (NC-JT) .
  • mTRP operation including redundant transmission or reception on multiple TRPs
  • SFN single-frequency-network
  • NC-JT non-coherent joint transmission
  • a UE may include a communication manager 140.
  • the communication manager 140 may receive, from a plurality of transmission reception points (TRPs) , a plurality of downlink reference signals, wherein each downlink reference signal is associated with a respective TRP of the plurality of TRPs; and transmit a plurality of uplink reference signals, wherein each uplink reference signal is precoded in association with a respective downlink reference signal of the plurality of downlink reference signals, and wherein at least one of the plurality of downlink reference signals or the plurality of uplink reference signals comprises at least one multi-port reference signal, wherein the plurality of uplink reference signals are configured to facilitate a determination, at a network node, of at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • TRPs transmission reception points
  • the communication manager 140 may transmit , to a plurality of transmission reception points (TRPs) , an uplink reference signal; receive, from the plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a TRP of the plurality of TRPs and is precoded in association with the uplink reference signal, and wherein at least one of the uplink reference signal or the plurality of downlink reference signals comprises at least one multi-port reference signal; determine, based on the plurality of downlink reference signals, at least one of a timing offset or a phase offset associated with the plurality of TRPs; and transmit , to a network node, reporting information indicative of the at least one of the timing offset or the phase offset. Additionally, or alternatively, the communication manager 140 may perform one or more other operations described herein.
  • TRPs transmission reception points
  • a network node may include a communication manager 150.
  • the communication manager 150 may transmit, using a plurality of transmission reception points (TRPs) , a plurality of downlink reference signals, wherein each downlink reference signal is associated with a respective TRP of the plurality of TRPs; receive, from a user equipment (UE) , a plurality of uplink reference signals, wherein each uplink reference signal is precoded in association with a respective downlink reference signal of the plurality of downlink reference signals, and wherein at least one of the plurality of downlink reference signals or the plurality of uplink reference signals comprises at least one multi-port reference signal; and determine, based on the plurality of uplink reference signals, at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • TRPs transmission reception points
  • UE user equipment
  • the communication manager 150 may receive, from a user equipment (UE) and using a plurality of transmission reception points (TRPs) , an uplink reference signal; transmit, using the plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a TRP of the plurality of TRPs and is precoded in association with the uplink reference signal, and wherein at least one of the uplink reference signal or the plurality of downlink reference signals comprises at least one multi-port reference signal; and receive reporting information indicative of the at least one of a timing offset or a phase offset. Additionally, or alternatively, the communication manager 150 may perform one or more other operations described herein.
  • TRPs transmission reception points
  • 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 network node 110 in communication with an example UE 120 in a wireless network in accordance with the present disclosure.
  • the network node 110 may include a data source 212, a transmit processor 214, a transmit (TX) MIMO processor 216, a set of modems 232 (shown as 232a through 232t, where t ⁇ 1) , a set of antennas 234 (shown as 234a through 234v, where v ⁇ 1) , a MIMO detector 236, a receive processor 238, a data sink 239, a controller/processor 240, a memory 242, a communication unit 244, a scheduler 246, and/or a communication manager 150, among other examples.
  • TX transmit
  • one or a combination of the antenna (s) 234, the modem (s) 232, the MIMO detector 236, the receive processor 238, the transmit processor 214, and/or the TX MIMO processor 216 may be included in a transceiver of the network node 110.
  • the transceiver may be under control of and used by one or more processors, such as the controller/processor 240, and in some aspects in conjunction with processor-readable code stored in the memory 242, to perform aspects of the methods, processes, and/or operations described herein.
  • the network node 110 may include one or more interfaces, communication components, and/or other components that facilitate communication with the UE 120 or another network node.
  • processors may refer to one or more controllers and/or one or more processors.
  • processors may include transmit processor 214, TX MIMO processor 216, MIMO detector 236, receive processor 238, and/or controller/processor 240.
  • processors of the UE 120 may include MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, and/or controller/processor 280.
  • a single processor may perform all of the operations described as being performed by the one or more processors.
  • a first set of (one or more) processors of the one or more processors may perform a first operation described as being performed by the one or more processors
  • a second set of (one or more) processors of the one or more processors may perform a second operation 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 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. For example, operation 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.
  • the transmit processor 214 may receive data ( “downlink data” ) intended for the UE 120 (or a set of UEs that includes the UE 120) from the data source 212 (such as a data pipeline or a data queue) .
  • the transmit processor 214 may select one or more MCSs for the UE 120 in accordance with one or more channel quality indicators (CQIs) received from the UE 120.
  • the network node 110 may process the data (for example, including encoding the data) for transmission to the UE 120 on a downlink in accordance with the MCS (s) selected for the UE 120 to generate data symbols.
  • the transmit processor 214 may process system information (for example, semi-static resource partitioning information (SRPI) ) and/or control information (for example, CQI requests, grants, and/or upper layer signaling) and provide overhead symbols and/or control symbols.
  • the transmit processor 214 may generate reference symbols for reference signals (for example, a cell-specific reference signal (CRS) , a demodulation reference signal (DMRS) , or a channel state information (CSI) reference signal (CSI-RS) ) and/or synchronization signals (for example, a primary synchronization signal (PSS) or a secondary synchronization signals (SSS) ) .
  • reference signals for example, a cell-specific reference signal (CRS) , a demodulation reference signal (DMRS) , or a channel state information (CSI) reference signal (CSI-RS)
  • CSI-RS channel state information reference signal
  • synchronization signals for example, a primary synchronization signal (PSS) or a secondary synchronization signals (SSS)
  • the TX MIMO processor 216 may perform spatial processing (for example, 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 (for example, T output symbol streams) to the set of modems 232.
  • each output symbol stream may be provided to a respective modulator component (shown as MOD) of a modem 232.
  • Each modem 232 may use the respective modulator component to process (for example, to modulate) a respective output symbol stream (for example, for orthogonal frequency division multiplexing ( (OFDM) ) to obtain an output sample stream.
  • OFDM orthogonal frequency division multiplexing
  • Each modem 232 may further use the respective modulator component to process (for example, convert to analog, amplify, filter, and/or upconvert) the output sample stream to obtain a time domain downlink signal.
  • the modems 232a through 232t may together transmit a set of downlink signals (for example, T downlink signals) via the corresponding set of antennas 234.
  • a downlink signal may include a DCI communication, a MAC control element (MAC-CE) communication, an RRC communication, a downlink reference signal, or another type of downlink communication.
  • Downlink signals may be transmitted on a PDCCH, a PDSCH, and/or on another downlink channel.
  • a downlink signal may carry one or more transport blocks (TBs) of data.
  • a TB may be a unit of data that is transmitted over an air interface in the wireless communication network 100.
  • a data stream (for example, from the data source 212) may be encoded into multiple TBs for transmission over the air interface. The quantity of TBs used to carry the data associated with a particular data stream may be associated with a TB size common to the multiple TBs.
  • the TB size may be based on or otherwise associated with radio channel conditions of the air interface, the MCS used for encoding the data, the downlink resources allocated for transmitting the data, and/or another parameter.
  • the larger the TB size the greater the amount of data that can be transmitted in a single transmission, which reduces signaling overhead.
  • larger TB sizes may be more prone to transmission and/or reception errors than smaller TB sizes, but such errors may be mitigated by more robust error correction techniques.
  • uplink signals from the UE 120 may be received by an antenna 234, may be processed by a modem 232 (for example, a demodulator component, shown as DEMOD, of a modem 232) , may be detected by the MIMO detector 236 (for example, a receive (Rx) MIMO processor) if applicable, and/or may be further processed by the receive processor 238 to obtain decoded data and/or control information.
  • the receive processor 238 may provide the decoded data to a data sink 239 (which may be a data pipeline, a data queue, and/or another type of data sink) and provide the decoded control information to a processor, such as the controller/processor 240.
  • the network node 110 may use the scheduler 246 to schedule one or more UEs 120 for downlink or uplink communications.
  • the scheduler 246 may use DCI to dynamically schedule DL transmissions to the UE 120 and/or UL transmissions from the UE 120.
  • the scheduler 246 may allocate recurring time domain resources and/or frequency domain resources that the UE 120 may use to transmit and/or receive communications using an RRC configuration (for example, a semi-static configuration) , for example, to perform semi-persistent scheduling (SPS) or to configure a configured grant (CG) for the UE 120.
  • RRC configuration for example, a semi-static configuration
  • SPS semi-persistent scheduling
  • CG configured grant
  • One or more of the transmit processor 214, the TX MIMO processor 216, the modem 232, the antenna 234, the MIMO detector 236, the receive processor 238, and/or the controller/processor 240 may be included in an RF chain of the network node 110.
  • An RF chain may include one or more filters, mixers, oscillators, amplifiers, analog-to-digital converters (ADCs) , and/or other devices that convert between an analog signal (such as for transmission or reception via an air interface) and a digital signal (such as for processing by one or more processors of the network node 110) .
  • the RF chain may be or may be included in a transceiver of the network node 110.
  • the network node 110 may use the communication unit 244 to communicate with a core network and/or with other network nodes.
  • the communication unit 244 may support wired and/or wireless communication protocols and/or connections, such as Ethernet, optical fiber, common public radio interface (CPRI) , and/or a wired or wireless backhaul, among other examples.
  • the network node 110 may use the communication unit 244 to transmit and/or receive data associated with the UE 120 or to perform network control signaling, among other examples.
  • the communication unit 244 may include a transceiver and/or an interface, such as a network interface.
  • the UE 120 may include a set of antennas 252 (shown as antennas 252a through 252r, where r ⁇ 1) , a set of modems 254 (shown as modems 254a through 254u, where u ⁇ 1) , a MIMO detector 256, a receive processor 258, a data sink 260, a data source 262, a transmit processor 264, a TX MIMO processor 266, a controller/processor 280, a memory 282, and/or a communication manager 140, among other examples.
  • One or more of the components of the UE 120 may be included in a housing 284.
  • one or a combination of the antenna (s) 252, the modem (s) 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, or the TX MIMO processor 266 may be included in a transceiver that is included in the UE 120.
  • the transceiver may be under control of and used by one or more processors, such as the controller/processor 280, and in some aspects in conjunction with processor-readable code stored in the memory 282, to perform aspects of the methods, processes, or operations described herein.
  • the UE 120 may include another interface, another communication component, and/or another component that facilitates communication with the network node 110 and/or another UE 120.
  • the set of antennas 252 may receive the downlink communications or signals from the network node 110 and may provide a set of received downlink signals (for example, R received signals) to the set of modems 254.
  • each received signal may be provided to a respective demodulator component (shown as DEMOD) of a modem 254.
  • DEMOD demodulator component
  • Each modem 254 may use the respective demodulator component to condition (for example, filter, amplify, downconvert, and/or digitize) a received signal to obtain input samples.
  • Each modem 254 may use the respective demodulator component to further demodulate or process the input samples (for example, for OFDM) to obtain received symbols.
  • the MIMO detector 256 may obtain received symbols from the set of modems 254, may perform MIMO detection on the received symbols if applicable, and may provide detected symbols.
  • the receive processor 258 may process (for example, decode) the detected symbols, may provide decoded data for the UE 120 to the data sink 260 (which may include a data pipeline, a data queue, and/or an application executed on the UE 120) , and may provide decoded control information and system information to the controller/processor 280.
  • the transmit processor 264 may receive and process data ( “uplink data” ) from a data source 262 (such as a data pipeline, a data queue, and/or an application executed on the UE 120) and control information from the controller/processor 280.
  • the control information may include one or more parameters, feedback, one or more signal measurements, and/or other types of control information.
  • the receive processor 258 and/or the controller/processor 280 may determine, for a received signal (such as received from the network node 110 or another UE) , one or more parameters relating to transmission of the uplink communication.
  • the one or more parameters may include a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, a channel quality indicator (CQI) parameter, or a transmit power control (TPC) parameter, among other examples.
  • the control information may include an indication of the RSRP parameter, the RSSI parameter, the RSRQ parameter, the CQI parameter, the TPC parameter, and/or another parameter.
  • the control information may facilitate parameter selection and/or scheduling for the UE 120 by the network node 110.
  • the transmit processor 264 may generate reference symbols for one or more reference signals, such as an uplink DMRS, an uplink SRS, and/or another type of reference signal.
  • the symbols from the transmit processor 264 may be precoded by the TX MIMO processor 266, if applicable, and further processed by the set of modems 254 (for example, for DFT-s-OFDM or CP-OFDM) .
  • the TX MIMO processor 266 may perform spatial processing (for example, 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 (for example, U output symbol streams) to the set of modems 254.
  • each output symbol stream may be provided to a respective modulator component (shown as MOD) of a modem 254.
  • Each modem 254 may use the respective modulator component to process (for example, to modulate) a respective output symbol stream (for example, for OFDM) to obtain an output sample stream.
  • Each modem 254 may further use the respective modulator component to process (for example, convert to analog, amplify, filter, and/or upconvert) the output sample stream to obtain an uplink signal.
  • the modems 254a through 254u may transmit a set of uplink signals (for example, R uplink signals or U uplink symbols) via the corresponding set of antennas 252.
  • An uplink signal may include a UCI communication, a MAC-CE communication, an RRC communication, or another type of uplink communication.
  • Uplink signals may be transmitted on a PUSCH, a PUCCH, and/or another type of uplink channel.
  • An uplink signal may carry one or more TBs of data.
  • Sidelink data and control transmissions may generally use similar techniques as were described for uplink data and control transmission, and may use sidelink-specific channels such as a physical sidelink shared channel (PSSCH) , a physical sidelink control channel (PSCCH) , and/or a physical sidelink feedback channel (PSFCH) .
  • PSSCH physical sidelink shared channel
  • PSCCH physical sidelink control channel
  • PSFCH physical sidelink feedback channel
  • One or more antennas of the set of antennas 252 or the set of antennas 234 may include, or may be included within, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays, among other examples.
  • An antenna panel, an antenna group, a set of antenna elements, 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, or one or more antenna elements coupled with one or more transmission or reception components, such as one or more components of Fig. 2.
  • antenna can refer to one or more antennas, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays.
  • Antenna panel can refer to a group of antennas (such as antenna elements) arranged in an array or panel, which may facilitate beamforming by manipulating parameters of the group of antennas.
  • Antenna module may refer to circuitry including one or more antennas, which may also include one or more other components (such as filters, amplifiers, or processors) associated with integrating the antenna module into a wireless communication device.
  • each of the antenna elements of an antenna 234 or an antenna 252 may include one or more sub-elements for radiating or receiving radio frequency signals.
  • a single antenna element may include a first sub-element cross-polarized with a second sub-element that can be used to independently transmit cross-polarized signals.
  • the antenna elements may include patch antennas, dipole antennas, and/or other types of antennas arranged in a linear pattern, a two-dimensional pattern, or another pattern.
  • a spacing between antenna elements may be such that signals with a desired wavelength transmitted separately by the antenna elements may interact or interfere constructively and destructively along various directions (such as to form a desired beam) .
  • the spacing may provide a quarter wavelength, a half wavelength, or another fraction of a wavelength of spacing between neighboring antenna elements to allow for the desired constructive and destructive interference patterns of signals transmitted by the separate antenna elements within that expected range.
  • the amplitudes and/or phases of signals transmitted via antenna elements and/or sub-elements may be modulated and shifted relative to each other (such as by manipulating phase shift, phase offset, and/or amplitude) to generate one or more beams, which is referred to as beamforming.
  • beam may refer to a directional transmission of a wireless signal toward a receiving device or otherwise in a desired direction.
  • Beam may also generally refer to a direction associated with such a directional signal transmission, a set of directional resources associated with the signal transmission (for example, an angle of arrival, a horizontal direction, and/or a vertical direction) , and/or a set of parameters that indicate one or more aspects of a directional signal, a direction associated with the signal, and/or a set of directional resources associated with the signal.
  • antenna elements may be individually selected or deselected for directional transmission of a signal (or signals) by controlling amplitudes of one or more corresponding amplifiers and/or phases of the signal (s) to form one or more beams.
  • the shape of a beam (such as the amplitude, width, and/or presence of side lobes) and/or the direction of a beam (such as an angle of the beam relative to a surface of an antenna array) can be dynamically controlled by modifying the phase shifts, phase offsets, and/or amplitudes of the multiple signals relative to each other.
  • Different UEs 120 or network nodes 110 may include different numbers of antenna elements.
  • a UE 120 may include a single antenna element, two antenna elements, four antenna elements, eight antenna elements, or a different number of antenna elements.
  • a network node 110 may include eight antenna elements, 24 antenna elements, 64 antenna elements, 128 antenna elements, or a different number of antenna elements.
  • a larger number of antenna elements may provide increased control over parameters for beam generation relative to a smaller number of antenna elements, whereas a smaller number of antenna elements may be less complex to implement and may use less power than a larger number of antenna elements.
  • Multiple antenna elements may support multiple-layer transmission, in which a first layer of a communication (which may include a first data stream) and a second layer of a communication (which may include a second data stream) are transmitted using the same time and frequency resources with spatial multiplexing.
  • 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. 3 is a diagram illustrating an example disaggregated base station architecture 300 in accordance with the present disclosure.
  • One or more components of the example disaggregated base station architecture 300 may be, may include, or may be included in one or more network nodes (such one or more network nodes 110) .
  • 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 that can communicate indirectly with the core network 320 via one or more disaggregated control units, such as a Non-RT RIC 350 associated with a Service Management and Orchestration (SMO) Framework 360 and/or a Near-RT RIC 370 (for example, via an E2 link) .
  • SMO Service Management and Orchestration
  • the CU 310 may communicate with one or more DUs 330 via respective midhaul links, such as via 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 RF access links.
  • a UE 120 may be simultaneously served by multiple RUs 340.
  • Each of the components of the disaggregated base station architecture 300 may include one or more interfaces or may be coupled with one or more interfaces for receiving or transmitting signals, such as data or information, via a wired or wireless transmission medium.
  • the CU 310 may be logically split into one or more CU-UP units and one or more CU-CP units.
  • a CU-UP unit may 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 may be deployed to communicate with one or more DUs 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.
  • a DU 330 may host various layers, such as an RLC layer, a MAC layer, or one or more PHY layers, such as one or more high PHY layers or one or more low PHY layers.
  • Each layer (which also may be referred to as a module) may be implemented with an interface for communicating signals with other layers (and modules) hosted by the DU 330, or for communicating signals with the control functions hosted by the CU 310.
  • Each RU 340 may implement lower layer functionality. In some aspects, real-time and non-real-time aspects of control and user plane communication with the RU (s) 340 may be controlled by the corresponding DU 330.
  • the SMO Framework 360 may support RAN deployment and provisioning of non-virtualized and virtualized network elements.
  • the SMO Framework 360 may 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 360 may 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 virtualized network element may include, but is not limited to, a CU 310, a DU 330, an RU 340, a non-RT RIC 350, and/or a Near-RT RIC 370.
  • the SMO Framework 360 may communicate with a hardware aspect of a 4G RAN, a 5G NR RAN, and/or a 6G RAN, such as an open eNB (O-eNB) 380, via an O1 interface. Additionally or alternatively, the SMO Framework 360 may communicate directly with each of one or more RUs 340 via a respective O1 interface. In some deployments, 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 Non-RT RIC 350 may include or may implement a logical function that enables non-real-time control and optimization of RAN elements and resources, artificial intelligence and/or machine learning (AI/ML) workflows including model training and updates, and/or policy-based guidance of applications and/or features in the Near-RT RIC 370.
  • the Non-RT RIC 350 may be coupled to or may communicate with (such as via an A1 interface) the Near-RT RIC 370.
  • the Near-RT RIC 370 may include or may implement a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions via an interface (such as via an E2 interface) connecting one or more CUs 310, one or more DUs 330, and/or an O-eNB with the Near-RT RIC 370.
  • an interface such as via an E2 interface
  • the Non-RT RIC 350 may receive parameters or external enrichment information from external servers. Such information may be utilized by the Near-RT RIC 370 and may be received at the SMO Framework 360 or the Non-RT RIC 350 from non-network data sources or from network functions. In some examples, the Non-RT RIC 350 or the Near-RT RIC 370 may tune RAN behavior or performance. For example, the Non-RT RIC 350 may monitor long-term trends and patterns for performance and may employ AI/ML models to perform corrective actions via the SMO Framework 360 (such as reconfiguration via an O1 interface) or via creation of RAN management policies (such as A1 interface policies) .
  • SMO Framework 360 such as reconfiguration via an O1 interface
  • 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.
  • the network node 110, the controller/processor 240 of the network node 110, the UE 120, the controller/processor 280 of the UE 120, the CU 310, the DU 330, the RU 340, or any other component (s) of Figs. 1, 2, or 3 may implement one or more techniques or perform one or more operations associated with UE assisted network synchronization, as described in more detail elsewhere herein.
  • the controller/processor 240 of the network node 110, the controller/processor 280 of the UE 120, any other component (s) of Fig. 2, the CU 310, the DU 330, or the RU 340 may perform or direct operations of, for example, process 800 of Fig. 8, process 900 of Fig.
  • the memory 242 may store data and program codes for the network node 110, the network node 110, the CU 310, the DU 330, or the RU 340.
  • the memory 282 may store data and program codes for the UE 120.
  • the memory 242 or the memory 282 may include a non-transitory computer-readable medium storing a set of instructions (for example, code or program code) for wireless communication.
  • the memory 242 may include one or more memories, such as a single memory or multiple different memories (of the same type or of different types) .
  • the memory 282 may include one or more memories, such as a single memory or multiple different memories (of the same type or of different types) .
  • the set of instructions when executed (for example, directly, or after compiling, converting, or interpreting) by one or more processors of the network node 110, the UE 120, the CU 310, the DU 330, or the RU 340, may cause the one or more processors to perform process 800 of Fig. 8, process 900 of Fig. 9, process 1000 of Fig. 10, process 1100 of Fig. 11, or other processes as described herein.
  • executing instructions may include running the instructions, converting the instructions, compiling the instructions, and/or interpreting the instructions, among other examples.
  • a UE (e.g., the UE 120) includes means for receiving, from a plurality of transmission reception points (TRPs) , a plurality of downlink reference signals, wherein each downlink reference signal is associated with a respective TRP of the plurality of TRPs; and/or means for transmitting a plurality of uplink reference signals, wherein each uplink reference signal is precoded in association with a respective downlink reference signal of the plurality of downlink reference signals, and wherein at least one of the plurality of downlink reference signals or the plurality of uplink reference signals comprises at least one multi-port reference signal, wherein the plurality of uplink reference signals are configured to facilitate a determination, at a network node, of at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • TRPs transmission reception points
  • the UE includes means for transmitting, to a plurality of transmission reception points (TRPs) , an uplink reference signal; means for receiving, from the plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a TRP of the plurality of TRPs and is precoded in association with the uplink reference signal, and wherein at least one of the uplink reference signal or the plurality of downlink reference signals comprises at least one multi-port reference signal; means for determining, based on the plurality of downlink reference signals, at least one of a timing offset or a phase offset associated with the plurality of TRPs; and/or means for transmitting, to a network node, reporting information indicative of the at least one of the timing offset or the phase offset.
  • TRPs transmission reception points
  • the means for the user equipment (UE) 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.
  • a network node (e.g., the network node 110) includes means for transmitting, using a plurality of transmission reception points (TRPs) , a plurality of downlink reference signals, wherein each downlink reference signal is associated with a respective TRP of the plurality of TRPs; means for receiving, from a user equipment (UE) , a plurality of uplink reference signals, wherein each uplink reference signal is precoded in association with a respective downlink reference signal of the plurality of downlink reference signals, and wherein at least one of the plurality of downlink reference signals or the plurality of uplink reference signals comprises at least one multi-port reference signal; and/or means for determining, based on the plurality of uplink reference signals, at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • TRPs transmission reception points
  • the network node includes means for receiving, from a user equipment (UE) and using a plurality of transmission reception points (TRPs) , an uplink reference signal; means for transmitting, using the plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a TRP of the plurality of TRPs and is precoded in association with the uplink reference signal, and wherein at least one of the uplink reference signal or the plurality of downlink reference signals comprises at least one multi-port reference signal; and/or means for receiving reporting information indicative of the at least one of a timing offset or a phase offset.
  • UE user equipment
  • TRPs transmission reception points
  • the means for the network node to perform operations described herein may include, for example, one or more of communication manager 150, transmit processor 220, TX MIMO processor 230, modem 232, antenna 234, MIMO detector 236, receive processor 238, controller/processor 240, memory 242, or scheduler 246.
  • Fig. 4 is a diagram of an example 400 associated with network synchronization, in accordance with the present disclosure.
  • the example 400 depicts aspects of a first process (“Pr1” ) for performing network synchronization.
  • the first process, Pr1 is a process in which a network node transmits downlink reference signals to a UE, the UE responds with uplink reference signals precoded with information associated with the received downlink reference signals, and the network node determines, based on the precoded uplink reference signals, one or more time offsets and/or one or more phase offsets between TRPs.
  • multiple network nodes may communicate with a UE 402.
  • the UE 402 may be, be similar to, include, or be included in, the UE 120 depicted in Figs. 1-3.
  • the multiple network nodes may include one or more network nodes 110, one or more CUs, one or more DUs, one or more RUs, one or more core network nodes, one or more network servers, one or more application servers, and/or one or more Access and Mobility Management Functions (AMFs) , among other examples.
  • the multiple network nodes may include a TRP 1 404, a TRP 2 406, and a network node 408.
  • the TRP 1 404 and the TRP 2 406 may be implemented at a single network node or at different network nodes.
  • the network node 408 may include one or more of the TRP 1 404 and the TRP 2 406.
  • the network node 408 may be a separate network node from the TRP 1 404 and the TRP 2 406.
  • the network node 408 may be a central network node, a core network node, and/or a CU (e.g., where the TRP 1 404 and/or the TRP 2 406 is an associated DU) , among other examples.
  • one or more of the TRP 1 404, the TRP 2 406, and/or the network node 408 may be, be similar to, include, or be included in, the network node 110 depicted in Figs. 1 and 2, and/or one or more components of the disaggregated base station architecture 300 depicted in Fig. 3.
  • the UE 402 may communicate with any number, I, of TRPs
  • the UE 402 and one or more of the TRP 1 404, the TRP 2 406, and/or the network node 408 may be part of a wireless network (e.g., wireless network 100) .
  • the UE 402 and one or more of the TRP 1 404, the TRP 2 406, and/or the network node 408 may have established a wireless connection prior to operations shown in Fig. 4.
  • the TRP 1 404 may transmit, and the UE 402 may receive, a first downlink reference signal (DL-RS) (shown as “DL-RS 1” ) , y 1 .
  • the DL-RS 1 can be, for example, a channel state information reference signal (CSI-RS) and/or a downlink sounding reference signal (SRS) , among other examples.
  • the UE 402 may transmit, and the TRP 1 404 may receive, a sounding reference signal (SRS) (shown as “precoded SRS 1” ) , z 1 .
  • the precoded SRS 1 corresponds to the DL-RS 1.
  • the precoded SRS 1 can be precoded based on the DL-RS 1.
  • the TRP 2 406 may transmit, and the UE 402 may receive, a second DL-RS (shown as “DL-RS 2” ) , y 2 .
  • the DL-RS 2 can be, for example, a CSI-RS and/or a downlink SRS, among other examples.
  • the UE 402 may transmit, and the TRP 2 406 may receive, an SRS (shown as “precoded SRS 2” ) , z 2 .
  • the precoded SRS 2 corresponds to the DL-RS 2.
  • the precoded SRS 2 can be precoded based on the DL-RS 2.
  • the TRP 1 404 may provide, and the network node 408 may obtain, raw data associated with the precoded SRS 1.
  • the TRP 2 406 may provide, and the network node 408 may obtain, raw data associated with the precoded SRS 2.
  • the network node 408 may determine an aggregated signal value and derive a phase offset between the precoded SRS 1 and the precoded SRS 2 and/or a time offset between the precoded SRS 1 and the precoded SRS 2.
  • the received DL-SRSs can be represented as:
  • the conjugates, and of the received DL-SRSs may be used to isolate TRP timing and phase offsets.
  • the received precoded SRS 1 at TRP1 where ⁇ 1
  • 2 represents a reception uncertainty associated with a first TRP ( “TRP1” ) , represents a transmission uncertainty associated with the TRP1, represents a transmission uncertainty associated with the UE, represents a transmission uncertainty associated with the UE, represents an uplink channel between the UE and the TRP1, and represents a downlink channel between the TRP1 and the UE.
  • the received precoded SRS 2 at TRP2 where ⁇ 2
  • 2 In some cases, SRS precoding ensures that the phase of the channel is canceled out and does not impact the received SRS.
  • the network node 408 can calculate an aggregated signal value, as This results in the canceling out of the phase of the UE’s Tx/Rx mismatch, represented by the UE uncertainty terms, and the only remaining phase is the relative timing and/or phase offset between the TRPs Hence, UE’s Tx/Rx mismatch does not impact estimating ⁇ 12 and In general, UE Tx/Rx calibration cannot be assumed in practice.
  • the relative timing and/or phase offset between the two TRPs is estimated by observation across multiple subcarriers. As shown by reference number 424, the network node 408 may provide, and the TRP 2 406 may obtain an indication of the relative timing and/or phase offsets. In some aspects, the network node 408 may provide the indication to the TRP 1 404.
  • the TRP 2 406 may use the indication to synchronize to the TRP 1 404. In some cases, if the indication is provided to the TRP 1 404, the TRP 1 404 may use the indication to synchronize to the TRP 2 406.
  • 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 of an example 500 associated with network synchronization, in accordance with the present disclosure.
  • the example 500 depicts aspects of a second process (“Pr2” ) for performing network synchronization.
  • Pr2 is a process in which a UE transmits an uplink reference signal to a number of TRPs, the TRPs respond with downlink reference signals precoded with information associated with the received uplink reference signals, and the UE determines, based on the precoded downlink reference signals, one or more time offsets and/or one or more phase offsets between TRPs.
  • multiple network nodes may communicate with a UE 502.
  • the UE 502 may be, be similar to, include, or be included in, the UE 120 depicted in Figs. 1-3.
  • the multiple network nodes may include one or more network nodes 110, one or more CUs, one or more DUs, one or more RUs, one or more core network nodes, one or more network servers, one or more application servers, and/or one or more Access and Mobility Management Functions (AMFs) , among other examples.
  • the multiple network nodes may include a TRP 1 504 and a TRP 2 506.
  • the TRP 1 504 and the TRP 2 506 may be implemented at a single network node or at different network nodes.
  • one or more of the TRP 1 504 and the TRP 2 506 may be, be similar to, include, or be included in, the network node 110 depicted in Figs. 1 and 2, and/or one or more components of the disaggregated base station architecture 300 depicted in Fig. 3.
  • the UE 502 and one or more of the TRP 1 504 and the TRP 2 506 may be part of a wireless network (e.g., wireless network 100) .
  • the UE 502 and one or more of the TRP 1 504 and the TRP 2 506 may have established a wireless connection prior to operations shown in Fig. 5.
  • the UE 502 may transmit, and the TRP 1 504 and the TRP 2 506 may receive, an uplink reference signal (shown as “SRS” ) .
  • SRS uplink reference signal
  • the UE 502 can transmit a single port SRS to the TRP 1 504 and the TRP 2 406.
  • the SRS can be denoted as:
  • the TRP 1 504 may transmit, and the UE 502 may receive, a precoded CSI-RS 1 and, as shown by reference number 512, the TRP 2 506 may transmit, and the UE 502 may receive, a precoded CSI-RS 2.
  • the precoded CSI-RS 1 and CSI-RS 2 may be precoded based on the SRS. For example, after the TRP 1 504 and the TRP 2 506 estimate, respectively, the channel from the SRS, each TRP 504 and 506 can send a corresponding CSI-RS (single-port) to the UE 502.
  • the CSI-RS can be precoded based on the conjugate of the corresponding received SRS
  • CSI-RS precoding can ensure that the phase of the channel doesn’t impact the received CSI-RS.
  • the UE 502 may determine an aggregated signal value and derive a phase offset between the precoded CSI-RS 1 and the precoded CSI-RS 2 and/or a time offset between the precoded CSI-RS 1 and the precoded CSI-RS 2. For example, the UE 502 can calculate on each subcarrier of the received CSI-RS, thereby potentially ensuring that the phase of UE’s Tx/Rx mismatch is cancelled out, and the only remaining phase is the relative timing and/or phase offset between TRPs The relative timing/phase offset between the two TRPs can be estimated by observation across multiple subcarriers.
  • the UE 502 may transmit, and the TRP 2 506 may receive, an indication of the relative timing and/or phase offsets.
  • the UE 502 may provide the indication to the TRP 1 504.
  • the TRP 2 506 may use the indication to synchronize to the TRP 1 504.
  • the TRP 1 504 may use the indication to synchronize to the TRP 2 506.
  • some aspects described herein may utilize a multi-port DL-RS for a TRP with multiple antenna panels.
  • multi-port UL-RS and/or multi-port DL-RS may be used.
  • multi-port UL-RS and/or multi-port DL-RS may be used in a first case (e.g., “case (x) ” ) in which the UE includes multiple antennas (e.g., A>1) , a second case (e.g., “case (y) ” ) in which the TRP (s) include multiple antennas (e.g., P>1) , and/or a third case (e.g., a combination of case (x) and case (y) ) in which A>1 and P>1.
  • aspects may facilitate synchronization, in terms of phase and/or timing, between TRPs based on UE assistance.
  • synchronizing TRPs in this way may facilitate more effective and/or efficient use of network resources.
  • 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 of an example 600 associated with UE assisted network synchronization, in accordance with the present disclosure.
  • multiple network nodes may communicate with a UE 602.
  • the UE 602 may be, be similar to, include, or be included in, the UE 120 depicted in Figs. 1-3.
  • the multiple network nodes may include one or more network nodes 110, one or more CUs, one or more DUs, one or more RUs, one or more core network nodes, one or more network servers, one or more application servers, and/or one or more Access and Mobility Management Functions (AMFs) , among other examples.
  • AMFs Access and Mobility Management Functions
  • the multiple network nodes may include a network node 604 (which may include a TRP 1 606 and a TRP 2 608) .
  • the TRP 1 606 and the TRP 2 608 may be implemented at a single network node 604 or at different network nodes.
  • the network node 604 may be a central network node, a core network node, and/or a CU (e.g., where the TRP 1 606 and/or the TRP 2 608 is an associated DU) , among other examples.
  • one or more of the network node 604, the TRP 1 606, and/or the TRP 2 608 may be, be similar to, include, or be included in, the network node 110 depicted in Figs. 1 and 2, and/or one or more components of the disaggregated base station architecture 300 depicted in Fig. 3.
  • the UE 602 and one or more of the network node 604, the TRP 1 606, and/or the TRP 2 608 may be part of a wireless network (e.g., wireless network 100) .
  • the UE 602 and one or more of the network node 604, the TRP 1 606, and/or the TRP 2 608 may have established a wireless connection prior to operations shown in Fig. 6.
  • the UE 602 may transmit, and the network node 604 may receive, a capabilities report.
  • the capabilities report may indicate UE support for UE assisted network synchronization, as described herein.
  • the network node 604 may transmit, and the UE 602 may receive, configuration information.
  • the UE 602 may receive the configuration information via one or more of radio resource control (RRC) signaling, one or more medium access control (MAC) control elements (CEs) , and/or downlink control information (DCI) , among other examples.
  • RRC radio resource control
  • MAC medium access control
  • CEs control elements
  • DCI downlink control information
  • the configuration information may include an indication of one or more configuration parameters (e.g., already known to the UE 602 and/or previously indicated by the first network node or other network device) for selection by the UE 602, and/or explicit configuration information for the UE 602 to use to configure the UE 602, among other examples.
  • the configuration information may indicate that the UE 602 is to provide multi-port reference signals to support multi-TRP synchronization.
  • the UE 602 may configure itself based at least in part on the configuration information.
  • the UE 602 may be configured to perform one or more operations described herein based at least in part on the configuration information.
  • the UE 602 and the network node 604 may communicate.
  • the UE 602 and the network node 604 may exchange reference signals to facilitate determination of as a time offset and/or frequency offset.
  • the network node 604 may determine one or more timing offsets and/or one or more phase offsets.
  • the UE 602 may determine one or more timing offsets and/or one or more phase offsets.
  • the time offset and/or phase offset may be used by one of the TRPs to synchronize with the other TRP, thereby facilitating more effective and efficient use of network resources.
  • the network node 604 may transmit, and the UE 602 may receive, from a plurality of TRPs, a plurality of downlink reference signals.
  • Each downlink reference signal may be associated with a respective TRP of the plurality of TRPs.
  • the UE 602 may transmit, and the network node 604 may receive, a plurality of uplink reference signals.
  • Each uplink reference signal may be precoded in association with a respective downlink reference signal of the plurality of downlink reference signals.
  • At least one of the plurality of downlink reference signals or the plurality of uplink reference signals may include at least one multi-port reference signal.
  • Table 620 indicates a number of different cases and reference signal combinations for each case.
  • the first row 622 of table 620 corresponds to the first process Pr1 described herein in connection with Fig. 7A
  • the second row 624 of the table 620 corresponds to the second process Pr2 described herein in connection with Fig. 7B.
  • the first column 626 of the table corresponds to a first case ( “Base case (1) ” ) in which TRP-level synchronization is performed in accordance with a case 1A (1) , described above in connection with Fig. 4 and a case 2B(x) , described herein in connection with Fig. 5.
  • the second through fourth columns 628, 630, 632, and 634 indicate cases associated with antenna diversity schemes, as described herein.
  • column 628 corresponds to a case (2) (e.g., panel-level synchronization) in which the number of panels is greater than one (e.g., “P 0 >1” )
  • column 634 corresponds to a case (z) in which the number of UE antennas is greater than one (e.g., “A>1” ) and the number of ports per TRP is greater than one (e.g., “P>1” ) .
  • Row 636 depicts reference signal resource consumption for row 622 and row 638 depicts reference signal resource consumption for row 624, where N TRP : number of TRPs, P 0 : number of panels per TRP, P: number of ports per TRP, and A: number of UE antennas.
  • a downlink reference signal of the plurality of downlink reference signals may include a multi-panel reference signal associated with a plurality of panels of a TRP of a plurality of TRPs 606 and 608.
  • An uplink reference signal of the plurality of uplink reference signals may include a multi-port reference signal associated with a plurality of ports, each of the plurality of uplink ports being precoded in association with a respective panel of the plurality of panels.
  • all of the uplink reference signals of the plurality of uplink reference signals are associated with a single antenna of the UE 602 and all of the uplink ports of the plurality of uplink ports are associated with a single antenna of the UE 602.
  • the downlink reference signal may include a downlink SRS and the uplink reference signal may include an uplink SRS.
  • the downlink SRS may include an SRS time-frequency pattern and a CSI-RS sequence.
  • the uplink reference signal may include an uplink CSI-RS and the downlink reference signal may include a downlink CSI-RS.
  • a downlink reference signal of the plurality of downlink reference signals may include a single-port reference signal associated with a TRP 606 or 608 of the plurality of TRPs 606 and 608, and an uplink reference signal of the plurality of uplink reference signals may include a multi-port reference signal associated with a plurality of antennas of the UE 602.
  • a downlink reference signal of the plurality of downlink reference signals may include a multi-port reference signal associated with a TRP 606 or 608 of the plurality of TRPs 606 and 608.
  • the multi-port reference signal may be associated with a plurality of downlink ports and an uplink reference signal of the plurality of uplink reference signals may include a single-port reference signal associated with a selected port of the plurality of downlink ports.
  • all of the uplink reference signals of the plurality of uplink reference signals may be associated with a single antenna of the UE 602.
  • a downlink reference signal of the plurality of downlink reference signals may include a multi-port reference signal associated with a TRP 606 or 608 of the plurality of TRPs 606 and 608.
  • the multi-port reference signal may be associated with a plurality of downlink ports and an uplink reference signal of the plurality of uplink reference signals may include a multi-port reference signal associated with a plurality of uplink ports. Each uplink port of the plurality of uplink ports may be associated with a selected downlink port of the plurality of downlink ports.
  • the uplink reference signal may include a multi-port reference signals associated with a plurality of antennas of the UE 602.
  • the uplink reference signal may include a single-port reference signal and a downlink reference signal of the plurality of downlink reference signals may include a multi-port downlink reference signal associated with a plurality of panels of a TRP 606 or 608 of the plurality of TRPs 606 and 608.
  • the downlink reference signal may include a downlink SRS and the uplink reference signal may include an uplink SRS.
  • the downlink SRS may include an SRS time-frequency pattern and a CSI-RS signal sequence.
  • the uplink reference signal may include an uplink CSI-RS and the downlink reference signal may include a downlink CSI-RS.
  • the uplink reference signal may include a multi-port reference signal associated with a plurality of antennas of the UE 602 and a downlink reference signal of the plurality of downlink reference signals may include a single-port reference signal associated with a TRP 606 or 608 of the plurality of TRPs 606 and 608.
  • the UE 602 may receive, from the network node 604, an indication of a selected port of the uplink reference signal.
  • the indication may include an SRS resource indicator (SRI) .
  • the indication may be carried in downlink control information (DCI) scheduling a physical uplink shared channel (PUSCH) .
  • DCI downlink control information
  • PUSCH physical uplink shared channel
  • an uplink reference signal may include a single-port reference signal and a downlink reference signal of the plurality of downlink reference signals may include a multi-port downlink reference signal associated with a TRP 606 or 608 of the plurality of TRPs 606 and 608.
  • the at least one of the timing offset or the phase offset may be calculated based on a selected port of a plurality of ports associated with the TRP 606 or 608.
  • the uplink reference signal may include a multi-antenna reference signal associated with a plurality of antennas of the UE 602 and a downlink reference signal of the plurality of downlink reference signals may include a multi-port reference signal associated with a TRP 606 or 608 of the plurality of TRPs 606 and 608.
  • the at least one of the timing offset or the phase offset may be based on a selected port of a plurality of ports associated with the TRP 606 or 608.
  • the network node 604 may transmit, and the UE 602 may receive, an indication of one or more selected ports of the uplink reference signal (e.g., the one or more selected ports may include the selected port) .
  • the indication of the one or more selected ports may include an SRI.
  • the indication may be carried in DCI scheduling a PUSCH and the reporting information may be transmitted via the PUSCH.
  • Fig. 6 is provided as an example. Other examples may differ from what is described with respect to Fig. 6.
  • Figs. 7A and 7B are diagrams of examples 700 and 734 associated with UE assisted network synchronization, in accordance with the present disclosure.
  • multiple network nodes may communicate with a UE 702.
  • the UE 702 may be, be similar to, include, or be included in, the UE 602 depicted in Fig. 6.
  • the multiple network nodes may include a TRP 1 704, a TRP 2 706, and a network node 708.
  • one or more of the TRP 1 704, the TRP 2 706, and/or the network node 708 may be, be similar to, include, or be included in, the network node 604, the TRP 1 606, the TRP 2 608, and/or the network node 610 depicted in Fig. 6.
  • the example 700 illustrates aspects of the cases 1B (y) and 1B (z) described above in connection with Fig. 6.
  • the TRPs 704 and 706 may transmit multi-port DL-RSs and the UE 702 may report one port (e.g., one TRP-antenna) for each TRP 704 and 706 to receive the consequent respective UL-RS.
  • the respective UL-RS may be linked to its corresponding DL-RS port reported by the UE 702.
  • the TRP 1 704 may transmit, and the UE 702 may receive, a first multi-port DL-RS (DL-RS 1) .
  • the UE 702 may perform a TRP 1 port selection operation associated with the multiple ports of the TRP 1 704 to select a TRP port.
  • the TRP 1 706 may transmit, and the UE 702 may receive, a second multi-port DL-RS (DL-RS 2) .
  • the UE 702 may perform a TRP 2 port selection operation associated with the multiple ports of the TRP 2 706 to select a TRP port.
  • the UE 702 may transmit, and the TRP 1 704 and TRP 2 706 may respectively receive, indications of the port indexes corresponding to the selected TRP ports.
  • the UE 702 may transmit, and the TRP 1 704 and TRP 2 706 may respectively receive, a precoded UL-RS 1, z1, and a precoded UL-RS 2.
  • the TRP 1 704 may provide, and the network node 708 may obtain, the raw data associated with the UL-RS 1.
  • the TRP 2 706 may provide, and the network node 708 may obtain, the raw data associated with the UL-RS 2.
  • the network node 708 may calculate and may derive the timing offset and/or phase offset ( ⁇ 12 and/or ) .
  • the network node 708 may provide, and the TRP 2 706 (or TRP 1 704) may obtain, an indication of the timing offset and/or phase offset ( ⁇ 12 and/or ) .
  • the TRP 2 706 may synchronize, using the timing offset and/or phase offset ( ⁇ 12 and/or ) , with the TRP 1 704 (or, in some cases, the TRP 1 may synchronize with the TRP 2) .
  • the multiple network nodes may include the TRP 1 704 and the TRP 2 706.
  • the example 734 illustrates aspects of the cases 2B (x) and 2B (z) described above in connection with Fig. 6.
  • the UE 702 may transmit a multi-port UL-RS (targeted to be received by all TRPs 704 and 706) , and the network may indicate one port (e.g., one UE antenna) for the UE 702 to receive the consequent DL-RSs.
  • Each of the consequent DL-RSs may be linked to the UL-RS port indicated by the network (e.g., precoded by the TRP 1 704 or the TRP 2 706, respectively) .
  • the selected UE antenna may be determined by an overall signal-to-noise ratio (SNR) across all TRPs 704 and 706.
  • the network e.g., the TRP 1 704 and/or the TRP 2 706) may indicate the UE antenna using an SRI.
  • a PUSCH grant DCI may be reused and the SRI may be re-interpretated as an antenna indication as opposed to an indication of non-codebook-based PUSCH’s transmission precoding.
  • the PUSCH grant DCI also may trigger the report of the timing offset and/or phase offset ( ⁇ 12 and/or ) .
  • the UE 702 may transmit, and the TRP 1 704 and the TRP 2 706 may receive, a multi-port UL-RS.
  • the TRP 1 704 and/or the TRP 2 706 may perform a UE antenna selection operation to select an antenna of the UE 702 for the UE 702 to receive subsequent DL-RSs.
  • the TRP 1 704 and/or the TRP 2 706 may transmit, and the UE 702 may receive, an indication of the selected antenna or antennas.
  • the TRP 1 704 may transmit, and the UE 702 may receive, a precoded DL-RS 1.
  • the TRP 2 706 may transmit, and the UE 702 may receive, a precoded DL-RS 2.
  • the UE 702 may calculate and derive the timing offset and/or phase offset ( ⁇ 12 and/or ) .
  • the UE 702 may transmit, and the TRP 2 706 (or TRP 1 704) may receive, an indication of the timing offset and/or phase offset ( ⁇ 12 and/or ) .
  • the TRP 2 706 may synchronize, using the timing offset and/or phase offset ( ⁇ 12 and/or ) , with the TRP 1 704 (or, in some cases, the TRP 1 may synchronize with the TRP 2) .
  • Figs. 7a and 7B are provided as examples. Other examples may differ from what is described with respect to Figs. 7A and 7B.
  • Fig. 8 is a diagram illustrating an example process 800 performed, for example, at a UE or an apparatus of a UE, in accordance with the present disclosure.
  • Example process 800 is an example where the apparatus or the UE (e.g., UE 120) performs operations associated with UE assisted network synchronization.
  • process 800 may include receiving, from a plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a respective TRP of the plurality of TRPs (block 810) .
  • the UE e.g., using reception component 1202 and/or communication manager 1206, depicted in Fig. 12
  • process 800 may include transmitting a plurality of uplink reference signals, wherein each uplink reference signal is precoded in association with a respective downlink reference signal of the plurality of downlink reference signals, and wherein at least one of the plurality of downlink reference signals or the plurality of uplink reference signals comprises at least one multi-port reference signal, wherein the plurality of uplink reference signals are configured to facilitate a determination, at a network node, of at least one of a timing offset or a phase offset associated with the plurality of TRPs (block 820) .
  • the UE e.g., using transmission component 1204 and/or communication manager 1206, depicted in Fig.
  • each uplink reference signal may be precoded in association with a respective downlink reference signal of the plurality of downlink reference signals, and wherein at least one of the plurality of downlink reference signals or the plurality of uplink reference signals comprises at least one multi-port reference signal, wherein the plurality of uplink reference signals are configured to facilitate a determination, at a network node, of at least one of a timing offset or a phase offset associated with the plurality of TRPs, as described above.
  • Process 800 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.
  • a downlink reference signal of the plurality of downlink reference signals comprises a multi-port reference signal associated with a plurality of panels of a TRP of the plurality of TRPs.
  • an uplink reference signal of the plurality of uplink reference signals comprises a multi-port reference signal associated with a plurality of uplink ports, each of the plurality of uplink ports being precoded in association with a respective panel of the plurality of panels.
  • the downlink reference signal comprises a downlink SRS, and wherein the uplink reference signal comprises an uplink SRS.
  • the downlink SRS comprises an SRS time-frequency pattern and a channel state information reference signal sequence.
  • the uplink reference signal comprises an uplink CSI-RS, and wherein the downlink reference signal comprises a downlink CSI-RS.
  • a downlink reference signal of the plurality of downlink reference signals comprises a single-port reference signal associated with a TRP of the plurality of TRPs, and wherein an uplink reference signal of the plurality of uplink reference signals comprises a multi-port reference signal associated with a plurality of antennas of the UE.
  • a downlink reference signal of the plurality of downlink reference signals comprises a multi-port reference signal associated with a TRP of the plurality of TRPs, wherein the multi-port reference signal is associated with a plurality of downlink ports, and wherein an uplink reference signal of the plurality of uplink reference signals comprises a single-port reference signal associated with a selected port of the plurality of downlink ports.
  • all of the uplink reference signals of the plurality of uplink reference signals are associated with a single antenna of the UE.
  • a downlink reference signal of the plurality of downlink reference signals comprises a multi-port reference signal associated with a TRP of the plurality of TRPs, wherein the multi-port reference signal is associated with a plurality of downlink ports, and wherein an uplink reference signal of the plurality of uplink reference signals comprises a multi-port reference signal associated with a plurality of uplink ports, wherein each uplink port of the plurality of uplink ports is associated with a selected downlink port of the plurality of downlink ports.
  • the uplink reference signal comprises a multi-port reference signals associated with a plurality of antennas of the UE.
  • process 800 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 8. Additionally, or alternatively, two or more of the blocks of process 800 may be performed in parallel.
  • Fig. 9 is a diagram illustrating an example process 900 performed, for example, at a network node or an apparatus of a network node, in accordance with the present disclosure.
  • Example process 900 is an example where the apparatus or the network node (e.g., network node 110) performs operations associated with UE assisted network synchronization.
  • the apparatus or the network node e.g., network node 110
  • process 900 may include transmitting, using a plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a respective TRP of the plurality of TRPs (block 910) .
  • the network node e.g., using transmission component 1304 and/or communication manager 1306, depicted in Fig. 13
  • process 900 may include receiving, from a UE, a plurality of uplink reference signals, wherein each uplink reference signal is precoded in association with a respective downlink reference signal of the plurality of downlink reference signals, and wherein at least one of the plurality of downlink reference signals or the plurality of uplink reference signals comprises at least one multi-port reference signal (block 920) .
  • the network node e.g., using reception component 1302 and/or communication manager 1306, depicted in Fig.
  • each uplink reference signal is precoded in association with a respective downlink reference signal of the plurality of downlink reference signals, and wherein at least one of the plurality of downlink reference signals or the plurality of uplink reference signals comprises at least one multi-port reference signal, as described above.
  • process 900 may include determining, based on the plurality of uplink reference signals, at least one of a timing offset or a phase offset associated with the plurality of TRPs (block 930) .
  • the network node e.g., using communication manager 1306, depicted in Fig. 13
  • Process 900 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.
  • a downlink reference signal of the plurality of downlink reference signals comprises a multi-port reference signal associated with a plurality of panels of a TRP of the plurality of TRPs.
  • an uplink reference signal of the plurality of uplink reference signals comprises a multi-port reference signal associated with a plurality of uplink ports, each of the plurality of uplink ports being precoded in association with a respective panel of the plurality of panels.
  • the downlink reference signal comprises a downlink SRS, and wherein the uplink reference signal comprises an uplink SRS.
  • the downlink SRS comprises an SRS time-frequency pattern and a channel state information reference signal sequence.
  • the uplink reference signal comprises an uplink CSI-RS, and wherein the downlink reference signal comprises a downlink CSI-RS.
  • a downlink reference signal of the plurality of downlink reference signals comprises a single-port reference signal associated with a TRP of the plurality of TRPs, and wherein an uplink reference signal of the plurality of uplink reference signals comprises a multi-port reference signal associated with a plurality of antennas of the UE.
  • process 900 includes selecting, based on the plurality of uplink reference signals, a selected antenna of the plurality of antennas of the UE, wherein determining the at least one of the timing offset or the phase offset comprises determining the at least one of the timing offset or the phase offset based on the selected antenna.
  • a downlink reference signal of the plurality of downlink reference signals comprises a multi-port reference signal associated with a TRP of the plurality of TRPs, wherein the multi-port reference signal is associated with a plurality of downlink ports, and wherein an uplink reference signal of the plurality of uplink reference signals comprises a single-port reference signal associated with a selected port of the plurality of downlink ports.
  • all of the uplink reference signals of the plurality of uplink reference signals are associated with a single antenna of the UE.
  • a downlink reference signal of the plurality of downlink reference signals comprises a multi-port reference signal associated with a TRP of the plurality of TRPs, wherein the multi-port reference signal is associated with a plurality of downlink ports, and wherein an uplink reference signal of the plurality of uplink reference signals comprises a multi-port reference signal associated with a plurality of uplink ports, wherein each uplink port of the plurality of uplink ports is associated with a selected downlink port of the plurality of downlink ports.
  • the uplink reference signal comprises a multi-port reference signals associated with a plurality of antennas of the UE.
  • process 900 includes selecting, based on the plurality of uplink reference signals, a selected antenna of the plurality of antennas of the UE, wherein determining the at least one of the timing offset or the phase offset comprises determining the at least one of the timing offset or the phase offset based on the selected antenna.
  • process 900 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 9. Additionally, or alternatively, two or more of the blocks of process 900 may be performed in parallel.
  • Fig. 10 is a diagram illustrating an example process 1000 performed, for example, at a UE or an apparatus of a UE, in accordance with the present disclosure.
  • Example process 1000 is an example where the apparatus or the UE (e.g., UE 120) performs operations associated with UE assisted network synchronization.
  • the apparatus or the UE e.g., UE 120
  • process 1000 may include transmitting, to a plurality of TRPs, an uplink reference signal (block 1010) .
  • the UE e.g., using transmission component 1204 and/or communication manager 1206, depicted in Fig. 12
  • process 1000 may include receiving, from the plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a TRP of the plurality of TRPs and is precoded in association with the uplink reference signal, and wherein at least one of the uplink reference signal or the plurality of downlink reference signals comprises at least one multi-port reference signal (block 1020) .
  • the UE e.g., using reception component 1202 and/or communication manager 1206, depicted in Fig.
  • each downlink reference signal is associated with a TRP of the plurality of TRPs and is precoded in association with the uplink reference signal, and wherein at least one of the uplink reference signal or the plurality of downlink reference signals comprises at least one multi-port reference signal, as described above.
  • process 1000 may include determining, based on the plurality of downlink reference signals, at least one of a timing offset or a phase offset associated with the plurality of TRPs (block 1030) .
  • the UE e.g., using communication manager 1206, depicted in Fig. 12
  • process 1000 may include transmitting, to a network node, reporting information indicative of the at least one of the timing offset or the phase offset (block 1040) .
  • the UE e.g., using transmission component 1204 and/or communication manager 1206, depicted in Fig. 12
  • Process 1000 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 uplink reference signal comprises a single-port reference signal and wherein a downlink reference signal of the plurality of downlink reference signals comprises a multi-port downlink reference signal associated with a plurality of panels of a TRP of the plurality of TRPs.
  • the downlink reference signal comprises a downlink SRS
  • the uplink reference signal comprises an uplink SRS.
  • the downlink SRS comprises an SRS time-frequency pattern and a channel state information reference signal sequence.
  • the uplink reference signal comprises an uplink CSI-RS, and wherein the downlink reference signal comprises a downlink CSI-RS.
  • the uplink reference signal comprises a multi-port reference signal associated with a plurality of antennas of the UE, and wherein a downlink reference signal of the plurality of downlink reference signals comprises a single-port reference signal associated with a TRP of the plurality of TRPs.
  • process 1000 includes receiving an indication of a selected port of the uplink reference signal.
  • the indication comprises a sounding reference signal resource indicator.
  • receiving the indication comprises receiving DCI scheduling a PUSCH
  • transmitting the reporting information comprises transmitting the reporting information via the PUSCH.
  • the uplink reference signal comprises a single-port reference signal and wherein a downlink reference signal of the plurality of downlink reference signals comprises a multi-port downlink reference signal associated with a TRP of the plurality of TRPs.
  • the at least one of the timing offset or the phase offset is based on a selected port of a plurality of ports associated with the TRP.
  • the uplink reference signal comprises a multi-antenna reference signal associated with a plurality of antennas of the UE, and wherein a downlink reference signal of the plurality of downlink reference signals comprises a multi-port reference signal associated with a TRP of the plurality of TRPs.
  • the at least one of the timing offset or the phase offset is based on a selected port of a plurality of ports associated with the TRP, and the method further comprising receiving an indication of one or more selected ports of the uplink reference signal, the one or more selected ports comprising the selected port.
  • the indication of the one or more selected ports comprises an SRI.
  • receiving the indication comprises receiving DCI scheduling a PUSCH, and wherein transmitting the reporting information comprises transmitting the reporting information via the PUSCH.
  • process 1000 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 10. Additionally, or alternatively, two or more of the blocks of process 1000 may be performed in parallel.
  • Fig. 11 is a diagram illustrating an example process 1100 performed, for example, at a network node or an apparatus of a network node, in accordance with the present disclosure.
  • Example process 1100 is an example where the apparatus or the network node (e.g., network node 110) performs operations associated with UE assisted network synchronization.
  • the apparatus or the network node e.g., network node 110
  • process 1100 may include receiving, from a UE and using a plurality of TRPs, an uplink reference signal (block 1110) .
  • the network node e.g., using reception component 1302 and/or communication manager 1306, depicted in Fig. 13
  • process 1100 may include transmitting, using the plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a TRP of the plurality of TRPs and is precoded in association with the uplink reference signal, and wherein at least one of the uplink reference signal or the plurality of downlink reference signals comprises at least one multi-port reference signal (block 1120) .
  • the network node e.g., using transmission component 1304 and/or communication manager 1306, depicted in Fig.
  • each downlink reference signal is associated with a TRP of the plurality of TRPs and is precoded in association with the uplink reference signal, and wherein at least one of the uplink reference signal or the plurality of downlink reference signals comprises at least one multi-port reference signal, as described above.
  • process 1100 may include receiving reporting information indicative of the at least one of a timing offset or a phase offset (block 1130) .
  • the network node e.g., using reception component 1302 and/or communication manager 1306, depicted in Fig. 13
  • Process 1100 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 uplink reference signal comprises a single-port reference signal and wherein a downlink reference signal of the plurality of downlink reference signals comprises a multi-port downlink reference signal associated with a plurality of panels of a TRP of the plurality of TRPs.
  • the downlink reference signal comprises a downlink SRS
  • the uplink reference signal comprises an uplink SRS.
  • the downlink SRS comprises an SRS time-frequency pattern and a channel state information reference signal sequence.
  • the uplink reference signal comprises an uplink CSI-RS, and wherein the downlink reference signal comprises a downlink CSI-RS.
  • the uplink reference signal comprises a multi-port reference signal associated with a plurality of antennas of the UE, and wherein a downlink reference signal of the plurality of downlink reference signals comprises a single-port reference signal associated with a TRP of the plurality of TRPs.
  • process 1100 includes transmitting an indication of a selected port of the uplink reference signal.
  • the indication comprises a sounding reference signal resource indicator.
  • transmitting the indication comprises receiving DCI scheduling a PUSCH, and wherein receiving the reporting information comprises receiving the reporting information via the PUSCH.
  • the uplink reference signal comprises a single-port reference signal and wherein a downlink reference signal of the plurality of downlink reference signals comprises a multi-port downlink reference signal associated with a TRP of the plurality of TRPs.
  • the at least one of the timing offset or the phase offset is based on a selected port of a plurality of ports associated with the TRP.
  • the uplink reference signal comprises a multi-antenna reference signal associated with a plurality of antennas of the UE, and wherein a downlink reference signal of the plurality of downlink reference signals comprises a multi-port reference signal associated with a TRP of the plurality of TRPs.
  • the at least one of the timing offset or the phase offset is based on a selected port of a plurality of ports associated with the TRP, and the method further comprising transmitting an indication of one or more selected ports of the uplink reference signal, the one or more selected ports comprising the selected port.
  • the indication of the one or more selected ports comprises an SRI.
  • transmitting the indication comprises transmitting DCI scheduling a PUSCH, and wherein receiving the reporting information comprises receiving the reporting information via the PUSCH.
  • process 1100 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 11. Additionally, or alternatively, two or more of the blocks of process 1100 may be performed in parallel.
  • Fig. 12 is a diagram of an example apparatus 1200 for wireless communication, in accordance with the present disclosure.
  • the apparatus 1200 may be a UE, or a UE may include the apparatus 1200.
  • the apparatus 1200 includes a reception component 1202, a transmission component 1204, and/or a communication manager 1206, 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 1206 is the communication manager 140 described in connection with Fig. 1.
  • the apparatus 1200 may communicate with another apparatus 1208, such as a UE or a network node (such as a CU, a DU, an RU, or a base station) , using the reception component 1202 and the transmission component 1204.
  • another apparatus 1208 such as a UE or a network node (such as a CU, a DU, an RU, or a base station) , using the reception component 1202 and the transmission component 1204.
  • the apparatus 1200 may be configured to perform one or more operations described herein in connection with Figs. 6-7B. Additionally, or alternatively, the apparatus 1200 may be configured to perform one or more processes described herein, such as process 800 of Fig. 8, process 1000 of Fig. 10, or a combination thereof.
  • the apparatus 1200 and/or one or more components shown in Fig. 12 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. 12 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 one or more memories. 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 one or more controllers or one or more processors to perform the functions or operations of the component.
  • the reception component 1202 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 1208.
  • the reception component 1202 may provide received communications to one or more other components of the apparatus 1200.
  • the reception component 1202 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 1200.
  • the reception component 1202 may include one or more antennas, one or more modems, one or more demodulators, one or more MIMO detectors, one or more receive processors, one or more controllers/processors, one or more memories, or a combination thereof, of the UE described in connection with Fig. 2.
  • the transmission component 1204 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1208.
  • one or more other components of the apparatus 1200 may generate communications and may provide the generated communications to the transmission component 1204 for transmission to the apparatus 1208.
  • the transmission component 1204 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 1208.
  • the transmission component 1204 may include one or more antennas, one or more modems, one or more modulators, one or more transmit MIMO processors, one or more transmit processors, one or more controllers/processors, one or more memories, or a combination thereof, of the UE described in connection with Fig. 2. In some aspects, the transmission component 1204 may be co-located with the reception component 1202 in one or more transceivers.
  • the communication manager 1206 may support operations of the reception component 1202 and/or the transmission component 1204. For example, the communication manager 1206 may receive information associated with configuring reception of communications by the reception component 1202 and/or transmission of communications by the transmission component 1204. Additionally, or alternatively, the communication manager 1206 may generate and/or provide control information to the reception component 1202 and/or the transmission component 1204 to control reception and/or transmission of communications.
  • the reception component 1202 may receive, from a plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a respective TRP of the plurality of TRPs.
  • the transmission component 1204 may transmit a plurality of uplink reference signals, wherein each uplink reference signal is precoded in association with a respective downlink reference signal of the plurality of downlink reference signals, and wherein at least one of the plurality of downlink reference signals or the plurality of uplink reference signals comprises at least one multi-port reference signal, wherein the plurality of uplink reference signals are configured to facilitate a determination, at a network node, of at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • the transmission component 1204 may transmit, to a plurality of TRPs, an uplink reference signal.
  • the reception component 1202 may receive, from the plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a TRP of the plurality of TRPs and is precoded in association with the uplink reference signal, and wherein at least one of the uplink reference signal or the plurality of downlink reference signals comprises at least one multi-port reference signal.
  • the communication manager 1206 may determine, based on the plurality of downlink reference signals, at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • the transmission component 1204 may transmit, to a network node, reporting information indicative of the at least one of the timing offset or the phase offset.
  • the reception component 1202 may receive an indication of a selected port of the uplink reference signal.
  • Fig. 12 The number and arrangement of components shown in Fig. 12 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. 12. Furthermore, two or more components shown in Fig. 12 may be implemented within a single component, or a single component shown in Fig. 12 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 12 may perform one or more functions described as being performed by another set of components shown in Fig. 12.
  • Fig. 13 is a diagram of an example apparatus 1300 for wireless communication, in accordance with the present disclosure.
  • the apparatus 1300 may be a network node, or a network node may include the apparatus 1300.
  • the apparatus 1300 includes a reception component 1302, a transmission component 1304, and/or a communication manager 1306, 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 1306 is the communication manager 150 described in connection with Fig. 1.
  • the apparatus 1300 may communicate with another apparatus 1308, such as a UE or a network node (such as a CU, a DU, an RU, or a base station) , using the reception component 1302 and the transmission component 1304.
  • the apparatus 1300 may be configured to perform one or more operations described herein in connection with Figs. 6-7B. Additionally, or alternatively, the apparatus 1300 may be configured to perform one or more processes described herein, such as process 900 of Fig. 9, process 1100 of Fig. 11, or a combination thereof.
  • the apparatus 1300 and/or one or more components shown in Fig. 13 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. 13 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 one or more memories. 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 one or more controllers or one or more processors to perform the functions or operations of the component.
  • the reception component 1302 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 1308.
  • the reception component 1302 may provide received communications to one or more other components of the apparatus 1300.
  • the reception component 1302 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 1300.
  • the reception component 1302 may include one or more antennas, one or more modems, one or more demodulators, one or more MIMO detectors, one or more receive processors, one or more controllers/processors, one or more memories, or a combination thereof, of the network node described in connection with Fig. 2.
  • the reception component 1302 and/or the transmission component 1304 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 1300 via one or more communications links, such as a backhaul link, a midhaul link, and/or a fronthaul link.
  • the transmission component 1304 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1308.
  • one or more other components of the apparatus 1300 may generate communications and may provide the generated communications to the transmission component 1304 for transmission to the apparatus 1308.
  • the transmission component 1304 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 1308.
  • the transmission component 1304 may include one or more antennas, one or more modems, one or more modulators, one or more transmit MIMO processors, one or more transmit processors, one or more controllers/processors, one or more memories, or a combination thereof, of the network node described in connection with Fig. 2. In some aspects, the transmission component 1304 may be co-located with the reception component 1302 in one or more transceivers.
  • the communication manager 1306 may support operations of the reception component 1302 and/or the transmission component 1304. For example, the communication manager 1306 may receive information associated with configuring reception of communications by the reception component 1302 and/or transmission of communications by the transmission component 1304. Additionally, or alternatively, the communication manager 1306 may generate and/or provide control information to the reception component 1302 and/or the transmission component 1304 to control reception and/or transmission of communications.
  • the transmission component 1304 may transmit, using a plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a respective TRP of the plurality of TRPs.
  • the reception component 1302 may receive, from a UE, a plurality of uplink reference signals, wherein each uplink reference signal is precoded in association with a respective downlink reference signal of the plurality of downlink reference signals, and wherein at least one of the plurality of downlink reference signals or the plurality of uplink reference signals comprises at least one multi-port reference signal.
  • the communication manager 1306 may determine, based on the plurality of uplink reference signals, at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • the communication manager 1306 may select, based on the plurality of uplink reference signals, a selected antenna of the plurality of antennas of the UE, wherein determining the at least one of the timing offset or the phase offset comprises determining the at least one of the timing offset or the phase offset based on the selected antenna.
  • the communication manager 1306 may select, based on the plurality of uplink reference signals, a selected antenna of the plurality of antennas of the UE, wherein determining the at least one of the timing offset or the phase offset comprises determining the at least one of the timing offset or the phase offset based on the selected antenna.
  • the reception component 1302 may receive, from a UE and using a plurality of TRPs, an uplink reference signal.
  • the transmission component 1304 may transmit, using the plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a TRP of the plurality of TRPs and is precoded in association with the uplink reference signal, and wherein at least one of the uplink reference signal or the plurality of downlink reference signals comprises at least one multi-port reference signal.
  • the reception component 1302 may receive reporting information indicative of the at least one of a timing offset or a phase offset.
  • the transmission component 1304 may transmit an indication of a selected port of the uplink reference signal.
  • Fig. 13 The number and arrangement of components shown in Fig. 13 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. 13. Furthermore, two or more components shown in Fig. 13 may be implemented within a single component, or a single component shown in Fig. 13 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 13 may perform one or more functions described as being performed by another set of components shown in Fig. 13.
  • a method of wireless communication performed by a user equipment (UE) comprising: receiving, from a plurality of transmission reception points (TRPs) , a plurality of downlink reference signals, wherein each downlink reference signal is associated with a respective TRP of the plurality of TRPs; and transmitting a plurality of uplink reference signals, wherein each uplink reference signal is precoded in association with a respective downlink reference signal of the plurality of downlink reference signals, wherein at least one of the plurality of downlink reference signals or the plurality of uplink reference signals comprises at least one multi-port reference signal, and wherein the plurality of uplink reference signals are configured to facilitate a determination, at a network node, of at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • TRPs transmission reception points
  • Aspect 2 The method of Aspect 1, wherein a downlink reference signal of the plurality of downlink reference signals comprises a multi-port reference signal associated with a plurality of panels of a TRP of the plurality of TRPs.
  • Aspect 3 The method of Aspect 2, wherein an uplink reference signal of the plurality of uplink reference signals comprises a multi-port reference signal associated with a plurality of uplink ports, each of the plurality of uplink ports being precoded in association with a respective panel of the plurality of panels.
  • Aspect 4 The method of Aspect 3, wherein all of the uplink reference signals of the plurality of uplink reference signals are associated with a single antenna of the UE, and wherein all of the uplink ports of the plurality of uplink ports are associated with a single antenna of the UE.
  • Aspect 5 The method of either of Aspects 3 or 4, wherein the downlink reference signal comprises a downlink sounding reference signal (SRS) , and wherein the uplink reference signal comprises an uplink SRS.
  • SRS downlink sounding reference signal
  • Aspect 6 The method of Aspect 5, wherein the downlink SRS comprises an SRS time-frequency pattern and a channel state information reference signal sequence.
  • Aspect 7 The method of either of Aspects 3 or 4, wherein the uplink reference signal comprises an uplink channel state information reference signal (CSI-RS) , and wherein the downlink reference signal comprises a downlink CSI-RS.
  • CSI-RS uplink channel state information reference signal
  • Aspect 8 The method of any of Aspects 1-7, wherein a downlink reference signal of the plurality of downlink reference signals comprises a single-port reference signal associated with a TRP of the plurality of TRPs, and wherein an uplink reference signal of the plurality of uplink reference signals comprises a multi-port reference signal associated with a plurality of antennas of the UE.
  • Aspect 9 The method of any of Aspects 1-8, wherein a downlink reference signal of the plurality of downlink reference signals comprises a multi-port reference signal associated with a TRP of the plurality of TRPs, wherein the multi-port reference signal is associated with a plurality of downlink ports, and wherein an uplink reference signal of the plurality of uplink reference signals comprises a single-port reference signal associated with a selected port of the plurality of downlink ports.
  • Aspect 10 The method of Aspect 9, wherein all of the uplink reference signals of the plurality of uplink reference signals are associated with a single antenna of the UE.
  • Aspect 11 The method of any of Aspects 1-10, wherein a downlink reference signal of the plurality of downlink reference signals comprises a multi-port reference signal associated with a TRP of the plurality of TRPs, wherein the multi-port reference signal is associated with a plurality of downlink ports, and wherein an uplink reference signal of the plurality of uplink reference signals comprises a multi-port reference signal associated with a plurality of uplink ports, wherein each uplink port of the plurality of uplink ports is associated with a selected downlink port of the plurality of downlink ports.
  • Aspect 12 The method of Aspect 11, wherein the uplink reference signal comprises a multi-port reference signals associated with a plurality of antennas of the UE.
  • a method of wireless communication performed by a network node comprising: transmitting, using a plurality of transmission reception points (TRPs) , a plurality of downlink reference signals, wherein each downlink reference signal is associated with a respective TRP of the plurality of TRPs; receiving, from a user equipment (UE) , a plurality of uplink reference signals, wherein each uplink reference signal is precoded in association with a respective downlink reference signal of the plurality of downlink reference signals, and wherein at least one of the plurality of downlink reference signals or the plurality of uplink reference signals comprises at least one multi-port reference signal; and determining, based on the plurality of uplink reference signals, at least one of a timing offset or a phase offset associated with the plurality of TRPs.
  • TRPs transmission reception points
  • UE user equipment
  • Aspect 14 The method of Aspect 13, wherein a downlink reference signal of the plurality of downlink reference signals comprises a multi-port reference signal associated with a plurality of panels of a TRP of the plurality of TRPs.
  • Aspect 15 The method of Aspect 14, wherein an uplink reference signal of the plurality of uplink reference signals comprises a multi-port reference signal associated with a plurality of uplink ports, each of the plurality of uplink ports being precoded in association with a respective panel of the plurality of panels.
  • Aspect 16 The method of Aspect 15, wherein all of the uplink reference signals of the plurality of uplink reference signals are associated with a single antenna of the UE, and wherein all of the uplink ports of the plurality of uplink ports are associated with a single antenna of the UE.
  • Aspect 17 The method of either of Aspects 15 or 16, wherein the downlink reference signal comprises a downlink sounding reference signal (SRS) , and wherein the uplink reference signal comprises an uplink SRS.
  • SRS downlink sounding reference signal
  • Aspect 18 The method of Aspect 17, wherein the downlink SRS comprises an SRS time-frequency pattern and a channel state information reference signal sequence.
  • Aspect 19 The method of either of Aspects 15 or 16, wherein the uplink reference signal comprises an uplink channel state information reference signal (CSI-RS) , and wherein the downlink reference signal comprises a downlink CSI-RS.
  • CSI-RS uplink channel state information reference signal
  • Aspect 20 The method of any of Aspects 13-19, wherein a downlink reference signal of the plurality of downlink reference signals comprises a single-port reference signal associated with a TRP of the plurality of TRPs, and wherein an uplink reference signal of the plurality of uplink reference signals comprises a multi-port reference signal associated with a plurality of antennas of the UE.
  • Aspect 21 The method of Aspect 20, further comprising selecting, based on the plurality of uplink reference signals, a selected antenna of the plurality of antennas of the UE, wherein determining the at least one of the timing offset or the phase offset comprises determining the at least one of the timing offset or the phase offset based on the selected antenna.
  • Aspect 22 The method of any of Aspects 13-21, wherein a downlink reference signal of the plurality of downlink reference signals comprises a multi-port reference signal associated with a TRP of the plurality of TRPs, wherein the multi-port reference signal is associated with a plurality of downlink ports, and wherein an uplink reference signal of the plurality of uplink reference signals comprises a single-port reference signal associated with a selected port of the plurality of downlink ports.
  • Aspect 23 The method of Aspect 22, wherein all of the uplink reference signals of the plurality of uplink reference signals are associated with a single antenna of the UE.
  • Aspect 24 The method of any of Aspects 13-23, wherein a downlink reference signal of the plurality of downlink reference signals comprises a multi-port reference signal associated with a TRP of the plurality of TRPs, wherein the multi-port reference signal is associated with a plurality of downlink ports, and wherein an uplink reference signal of the plurality of uplink reference signals comprises a multi-port reference signal associated with a plurality of uplink ports, wherein each uplink port of the plurality of uplink ports is associated with a selected downlink port of the plurality of downlink ports.
  • Aspect 25 The method of Aspect 24, wherein the uplink reference signal comprises a multi-port reference signals associated with a plurality of antennas of the UE.
  • Aspect 26 The method of Aspect 25, further comprising selecting, based on the plurality of uplink reference signals, a selected antenna of the plurality of antennas of the UE, wherein determining the at least one of the timing offset or the phase offset comprises determining the at least one of the timing offset or the phase offset based on the selected antenna.
  • a method of wireless communication performed by a user equipment (UE) comprising: transmitting, to a plurality of transmission reception points (TRPs) , an uplink reference signal; receiving, from the plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a TRP of the plurality of TRPs and is precoded in association with the uplink reference signal, and wherein at least one of the uplink reference signal or the plurality of downlink reference signals comprises at least one multi-port reference signal; determining, based on the plurality of downlink reference signals, at least one of a timing offset or a phase offset associated with the plurality of TRPs; and transmitting, to a network node, reporting information indicative of the at least one of the timing offset or the phase offset.
  • TRPs transmission reception points
  • Aspect 28 The method of Aspect 27, wherein the uplink reference signal comprises a single-port reference signal and wherein a downlink reference signal of the plurality of downlink reference signals comprises a multi-port downlink reference signal associated with a plurality of panels of a TRP of the plurality of TRPs.
  • Aspect 29 The method of Aspect 28, wherein the downlink reference signal comprises a downlink sounding reference signal (SRS) , and wherein the uplink reference signal comprises an uplink SRS.
  • SRS downlink sounding reference signal
  • Aspect 30 The method of Aspect 29, wherein the downlink SRS comprises an SRS time-frequency pattern and a channel state information reference signal sequence.
  • Aspect 31 The method of Aspect 28, wherein the uplink reference signal comprises an uplink channel state information reference signal (CSI-RS) , and wherein the downlink reference signal comprises a downlink CSI-RS.
  • CSI-RS uplink channel state information reference signal
  • Aspect 32 The method of any of Aspects 27-31, wherein the uplink reference signal comprises a multi-port reference signal associated with a plurality of antennas of the UE, and wherein a downlink reference signal of the plurality of downlink reference signals comprises a single-port reference signal associated with a TRP of the plurality of TRPs.
  • Aspect 33 The method of Aspect 32, further comprising receiving an indication of a selected port of the uplink reference signal.
  • Aspect 34 The method of Aspect 33, wherein the indication comprises a sounding reference signal resource indicator.
  • Aspect 35 The method of either of Aspects 33 or 34, wherein receiving the indication comprises receiving downlink control information (DCI) scheduling a physical uplink shared channel (PUSCH) , and wherein transmitting the reporting information comprises transmitting the reporting information via the PUSCH.
  • DCI downlink control information
  • PUSCH physical uplink shared channel
  • Aspect 36 The method of any of Aspects 27-35, wherein the uplink reference signal comprises a single-port reference signal and wherein a downlink reference signal of the plurality of downlink reference signals comprises a multi-port downlink reference signal associated with a TRP of the plurality of TRPs.
  • Aspect 37 The method of Aspect 36, wherein the at least one of the timing offset or the phase offset is based on a selected port of a plurality of ports associated with the TRP.
  • Aspect 38 The method of any of Aspects 27-37, wherein the uplink reference signal comprises a multi-antenna reference signal associated with a plurality of antennas of the UE, and wherein a downlink reference signal of the plurality of downlink reference signals comprises a multi-port reference signal associated with a TRP of the plurality of TRPs.
  • Aspect 39 The method of Aspect 38, wherein the at least one of the timing offset or the phase offset is based on a selected port of a plurality of ports associated with the TRP; and the method further comprising receiving an indication of one or more selected ports of the uplink reference signal, the one or more selected ports comprising the selected port.
  • Aspect 40 The method of Aspect 39, wherein the indication of the one or more selected ports comprises a sounding reference signal resource indicator (SRI) .
  • SRI sounding reference signal resource indicator
  • Aspect 41 The method of either of Aspects 39 or 40, wherein receiving the indication comprises receiving downlink control information (DCI) scheduling a physical uplink shared channel (PUSCH) , and wherein transmitting the reporting information comprises transmitting the reporting information via the PUSCH.
  • DCI downlink control information
  • PUSCH physical uplink shared channel
  • a method of wireless communication performed by a network node comprising: receiving, from a user equipment (UE) and using a plurality of transmission reception points (TRPs) , an uplink reference signal; transmitting, using the plurality of TRPs, a plurality of downlink reference signals, wherein each downlink reference signal is associated with a TRP of the plurality of TRPs and is precoded in association with the uplink reference signal, and wherein at least one of the uplink reference signal or the plurality of downlink reference signals comprises at least one multi-port reference signal; and receiving reporting information indicative of the at least one of a timing offset or a phase offset.
  • UE user equipment
  • TRPs transmission reception points
  • Aspect 43 The method of Aspect 42, wherein the uplink reference signal comprises a single-port reference signal and wherein a downlink reference signal of the plurality of downlink reference signals comprises a multi-port downlink reference signal associated with a plurality of panels of a TRP of the plurality of TRPs.
  • Aspect 44 The method of Aspect 43, wherein the downlink reference signal comprises a downlink sounding reference signal (SRS) , and wherein the uplink reference signal comprises an uplink SRS.
  • SRS downlink sounding reference signal
  • Aspect 45 The method of Aspect 44, wherein the downlink SRS comprises an SRS time-frequency pattern and a channel state information reference signal sequence.
  • Aspect 46 The method of Aspect 43, wherein the uplink reference signal comprises an uplink channel state information reference signal (CSI-RS) , and wherein the downlink reference signal comprises a downlink CSI-RS.
  • CSI-RS uplink channel state information reference signal
  • Aspect 47 The method of any of Aspects 42-46, wherein the uplink reference signal comprises a multi-port reference signal associated with a plurality of antennas of the UE, and wherein a downlink reference signal of the plurality of downlink reference signals comprises a single-port reference signal associated with a TRP of the plurality of TRPs.
  • Aspect 48 The method of Aspect 47, further comprising transmitting an indication of a selected port of the uplink reference signal.
  • Aspect 49 The method of Aspect 48, wherein the indication comprises a sounding reference signal resource indicator.
  • Aspect 50 The method of either of Aspects 48 or 49, wherein transmitting the indication comprises receiving downlink control information (DCI) scheduling a physical uplink shared channel (PUSCH) , and wherein receiving the reporting information comprises receiving the reporting information via the PUSCH.
  • DCI downlink control information
  • PUSCH physical uplink shared channel
  • Aspect 51 The method of any of Aspects 42-50, wherein the uplink reference signal comprises a single-port reference signal and wherein a downlink reference signal of the plurality of downlink reference signals comprises a multi-port downlink reference signal associated with a TRP of the plurality of TRPs.
  • Aspect 52 The method of Aspect 51, wherein the at least one of the timing offset or the phase offset is based on a selected port of a plurality of ports associated with the TRP.
  • Aspect 53 The method of any of Aspects 42-52, wherein the uplink reference signal comprises a multi-antenna reference signal associated with a plurality of antennas of the UE, and wherein a downlink reference signal of the plurality of downlink reference signals comprises a multi-port reference signal associated with a TRP of the plurality of TRPs.
  • Aspect 54 The method of Aspect 53, wherein the at least one of the timing offset or the phase offset is based on a selected port of a plurality of ports associated with the TRP; and the method further comprising transmitting an indication of one or more selected ports of the uplink reference signal, the one or more selected ports comprising the selected port.
  • Aspect 55 The method of Aspect 54, wherein the indication of the one or more selected ports comprises a sounding reference signal resource indicator (SRI) .
  • SRI sounding reference signal resource indicator
  • Aspect 56 The method of either of Aspects 54 or 55, wherein transmitting the indication comprises transmitting downlink control information (DCI) scheduling a physical uplink shared channel (PUSCH) , and wherein receiving the reporting information comprises receiving the reporting information via the PUSCH.
  • DCI downlink control information
  • PUSCH physical uplink shared channel
  • Aspect 57 An apparatus for wireless communication at a device, the apparatus comprising one or more processors; one or more memories coupled with the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to perform the method of one or more of Aspects 1-12.
  • Aspect 58 An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors configured to cause the device to perform the method of one or more of Aspects 1-12.
  • Aspect 59 An apparatus for wireless communication, the apparatus comprising at least one means for performing the method of one or more of Aspects 1-12.
  • Aspect 60 A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by one or more processors to perform the method of one or more of Aspects 1-12.
  • Aspect 61 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 1-12.
  • Aspect 62 A device for wireless communication, the device comprising a processing system that includes one or more processors and one or more memories coupled with the one or more processors, the processing system configured to cause the device to perform the method of one or more of Aspects 1-12.
  • Aspect 63 An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to cause the device to perform the method of one or more of Aspects 1-12.
  • Aspect 64 An apparatus for wireless communication at a device, the apparatus comprising one or more processors; one or more memories coupled with the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to perform the method of one or more of Aspects 13-26.
  • Aspect 65 An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors configured to cause the device to perform the method of one or more of Aspects 13-26.
  • Aspect 66 An apparatus for wireless communication, the apparatus comprising at least one means for performing the method of one or more of Aspects 13-26.
  • Aspect 67 A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by one or more processors to perform the method of one or more of Aspects 13-26.
  • Aspect 68 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 13-26.
  • a device for wireless communication comprising a processing system that includes one or more processors and one or more memories coupled with the one or more processors, the processing system configured to cause the device to perform the method of one or more of Aspects 13-26.
  • Aspect 70 An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to cause the device to perform the method of one or more of Aspects 13-26.
  • Aspect 71 An apparatus for wireless communication at a device, the apparatus comprising one or more processors; one or more memories coupled with the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to perform the method of one or more of Aspects 27-41.
  • Aspect 72 An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors configured to cause the device to perform the method of one or more of Aspects 27-41.
  • Aspect 73 An apparatus for wireless communication, the apparatus comprising at least one means for performing the method of one or more of Aspects 27-41.
  • Aspect 74 A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by one or more processors to perform the method of one or more of Aspects 27-41.
  • Aspect 75 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 27-41.
  • Aspect 76 A device for wireless communication, the device comprising a processing system that includes one or more processors and one or more memories coupled with the one or more processors, the processing system configured to cause the device to perform the method of one or more of Aspects 27-41.
  • Aspect 77 An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to cause the device to perform the method of one or more of Aspects 27-41.
  • Aspect 78 An apparatus for wireless communication at a device, the apparatus comprising one or more processors; one or more memories coupled with the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to perform the method of one or more of Aspects 42-56.
  • Aspect 79 An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors configured to cause the device to perform the method of one or more of Aspects 42-56.
  • Aspect 80 An apparatus for wireless communication, the apparatus comprising at least one means for performing the method of one or more of Aspects 42-56.
  • Aspect 81 A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by one or more processors to perform the method of one or more of Aspects 42-56.
  • Aspect 82 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 42-56.
  • Aspect 83 A device for wireless communication, the device comprising a processing system that includes one or more processors and one or more memories coupled with the one or more processors, the processing system configured to cause the device to perform the method of one or more of Aspects 42-56.
  • Aspect 84 An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to cause the device to perform the method of one or more of Aspects 42-56.
  • the term “component” is intended to be broadly construed as hardware or a combination of hardware and at least one of software or firmware.
  • “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, or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • a “processor” is implemented in hardware or a combination of hardware and software. It will be apparent that systems or methods described herein may be implemented in different forms of hardware or a combination of hardware and software.
  • a component being configured to perform a function means that the component has a capability to perform the function, and does not require the function to be actually performed by the component, unless noted otherwise.
  • 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, or not equal to the threshold, among other examples.
  • a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members.
  • “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 (for example, 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, ” and similar terms are intended to be open-ended terms that do not limit an element that they modify (for example, an element “having” A may also have B) .
  • the phrase “based on” is intended to mean “based on or otherwise in association with” 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 (for example, if used in combination with “either” or “only one of” ) . It should be understood that “one or more” is equivalent to “at least one. ”

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (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, en provenance d'une pluralité de points d'émission/réception (TRP), une pluralité de signaux de référence de liaison descendante, chaque signal de référence de liaison descendante étant associé à un TRP respectif de la pluralité de TRP. L'UE peut transmettre une pluralité de signaux de référence de liaison montante, chaque signal de référence de liaison montante étant précodé en association avec un signal de référence de liaison descendante respectif de la pluralité de signaux de référence de liaison descendante, et au moins l'un de la pluralité de signaux de référence de liaison descendante ou de la pluralité de signaux de référence de liaison montante comprenant au moins un signal de référence multiport, la pluralité de signaux de référence de liaison montante étant configurés pour faciliter une détermination, au niveau d'un nœud de réseau, d'un décalage de synchronisation et/ou d'un décalage de phase associé à la pluralité de TRP. De nombreux autres aspects sont décrits.
PCT/CN2023/137410 2023-12-08 2023-12-08 Synchronisation de réseau assistée par équipement utilisateur Pending WO2025118265A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113826414A (zh) * 2019-05-21 2021-12-21 高通股份有限公司 对关于探测参考信号(srs)定时调整的信息的报告
WO2022007967A1 (fr) * 2020-07-10 2022-01-13 华为技术有限公司 Procédé et appareil de configuration de ressources de signal de référence
US20230239106A1 (en) * 2020-08-24 2023-07-27 Qualcomm Incorporated Techniques for group common reference signal triggering in wireless communications

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Publication number Priority date Publication date Assignee Title
CN113826414A (zh) * 2019-05-21 2021-12-21 高通股份有限公司 对关于探测参考信号(srs)定时调整的信息的报告
WO2022007967A1 (fr) * 2020-07-10 2022-01-13 华为技术有限公司 Procédé et appareil de configuration de ressources de signal de référence
US20230239106A1 (en) * 2020-08-24 2023-07-27 Qualcomm Incorporated Techniques for group common reference signal triggering in wireless communications

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QUALCOMM INCORPORATED: "Uplink control information", 3GPP DRAFT; R1-161943 UPLINK CONTROL INFORMATION, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Sophia-Antipolis, FR; 20160322 - 20160324, 16 March 2016 (2016-03-16), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051081059 *

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