WO2024011485A1 - Indicateurs de configuration de transmission pour communications à multiples points de transmission-réception - Google Patents

Indicateurs de configuration de transmission pour communications à multiples points de transmission-réception Download PDF

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Publication number
WO2024011485A1
WO2024011485A1 PCT/CN2022/105643 CN2022105643W WO2024011485A1 WO 2024011485 A1 WO2024011485 A1 WO 2024011485A1 CN 2022105643 W CN2022105643 W CN 2022105643W WO 2024011485 A1 WO2024011485 A1 WO 2024011485A1
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WIPO (PCT)
Prior art keywords
tci state
tci
mapping
precoder
beam parameters
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PCT/CN2022/105643
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English (en)
Inventor
Fang Yuan
Yan Zhou
Tao Luo
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Qualcomm Incorporated
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Priority to PCT/CN2022/105643 priority Critical patent/WO2024011485A1/fr
Publication of WO2024011485A1 publication Critical patent/WO2024011485A1/fr

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    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • 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
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • 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

Definitions

  • Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) .
  • a wireless multiple-access communications system may include a number of base stations (BSs) , each simultaneously supporting communications for multiple communication devices, which may be otherwise known as user equipment (UE) .
  • BSs base stations
  • UE user equipment
  • NR next generation new radio
  • LTE long term evolution
  • NR next generation new radio
  • 5G 5 th Generation
  • LTE long term evolution
  • NR next generation new radio
  • NR is designed to provide a lower latency, a higher bandwidth or a higher throughput, and a higher reliability than LTE.
  • NR is designed to operate over a wide array of spectrum bands, for example, from low-frequency bands below about 1 gigahertz (GHz) and mid-frequency bands from about 1 GHz to about 6 GHz, to high-frequency bands such as millimeter wave (mmWave) bands.
  • GHz gigahertz
  • mmWave millimeter wave
  • NR is also designed to operate across different spectrum types, from licensed spectrum to unlicensed and shared spectrum. Spectrum sharing enables operators to opportunistically aggregate spectrums to dynamically support high-bandwidth services. Spectrum sharing can extend the benefit of NR technologies to operating entities that may not have access to a licensed spectrum.
  • the UEs may compensate for the delay (e.g., propagation delay) of UL communications transmitted to the BS by determining and applying a timing advance to the UL communications.
  • a UE may be scheduled to communicate with one or more transmission reception points (TRPs) .
  • TRPs may be at different physical locations.
  • the TRPs may be co-located.
  • the communications transmitted by the TRPs may be transmitted in a same logical cell, including the same frequency resources, for example.
  • DCI single-downlink control information
  • a DCI from one of the TRPs may schedule communications for each of a plurality of TRPs.
  • multi-DCI (mDCI) mTRP (mTRP) communications each TRP may transmit DCI to the UE to schedule communications.
  • the present disclosure describes methods, mechanisms, and systems for unified TCI indication for multi-transmission reception point (mTRP) uplink (UL) communications.
  • the methods, schemes, and mechanisms provided herein may be applicable or suitable for spatial domain multiplexing (SDM) of mTRP UL communications in which more than one UL communication are simultaneously transmitted using the same time and frequency resources but using different spatial filters.
  • the unified transmission configuration indicator (TCI) state indication schemes of the present application may be used to indicate beam parameters for a common beam associated with more than one UL channel and/or UL reference signal.
  • the unified TCI state schemes of the present application may include TCI state indication and beam parameter mapping for one or more physical uplink control channel (PUCCH) communications, physical uplink shared channel (PUSCH) communication, UL demodulation reference signal (DMRS) , phase tracking reference signals (PTRS) , channel state information reference signals (CSI-RS) , and/or any other suitable UL channel and/or reference signal.
  • PUCCH physical uplink control channel
  • PUSCH physical uplink shared channel
  • DMRS UL demodulation reference signal
  • PTRS phase tracking reference signals
  • CSI-RS channel state information reference signals
  • a method of wireless communication performed at a network entity comprises: transmitting, to a user equipment (UE) , control information associated with an uplink (UL) communication, wherein the control information comprises: one or more beam parameters; and a transmission configuration indicator (TCI) codepoint indication indicating a first TCI state and a second TCI state, wherein the TCI codepoint indication is based on a mapping of the one or more beam parameters to the first TCI state and the second TCI state; and receiving, from the UE, the UL communication, wherein the UL communication is based on: at least one of the first TCI state or the second TCI state; and the mapping of the one or more beam parameters to the first TCI state and the second TCI state.
  • TCI transmission configuration indicator
  • a method of wireless communication performed at a user equipment comprises: receiving control information associated with an uplink (UL) communication, wherein the control information comprises: one or more beam parameters; and a transmission configuration indicator (TCI) codepoint indication indicating a first TCI state and a second TCI state, wherein the TCI codepoint indication is based on a mapping of the one or more beam parameters to the first TCI state and the second TCI; and transmitting the UL communication based on: the first TCI; the second TCI; and the mapping of the one or more beam parameters to the first TCI state and the second TCI state.
  • TCI transmission configuration indicator
  • a network entity comprises: a memory device; a transceiver; and a processor in communication with the memory device and the transceiver, wherein the network entity is configured to: transmit, to a user equipment (UE) , control information associated with an uplink (UL) communication, wherein the control information comprises: one or more beam parameters; and a TCI codepoint indication indicating a first TCI state and a second TCI state, wherein the TCI codepoint indication is based on a mapping of the one or more beam parameters to the first TCI state and the second TCI state; and receive, from the UE, the UL communication, wherein the UL communication is based on: at least one of the first TCI state or the second TCI state; and the mapping of the one or more beam parameters to the first TCI state and the second TCI state.
  • UE user equipment
  • UL uplink
  • a user equipment comprises: a memory device; a transceiver; and a processor in communication with the memory device and the transceiver, wherein the network entity is configured to: receive control information associated with an uplink (UL) communication, wherein the control information comprises: one or more beam parameters; and a TCI codepoint indication indicating a first TCI state and a second TCI state, wherein the TCI codepoint indication is based on a mapping of the one or more beam parameters to the first TCI state and the second TCI; and transmit the UL communication based on: the first TCI; the second TCI; and the mapping of the one or more beam parameters to the first TCI state and the second TCI state.
  • UL uplink
  • FIG. 1A illustrates a wireless communication network according to some aspects of the present disclosure.
  • FIG. 1B is a diagram illustrating an example disaggregated BS architecture according to some aspects of the present disclosure.
  • FIG. 2 illustrates a communication scenario with a reconfigurable intelligent surface according to some aspects of the present disclosure.
  • FIG. 3 is a diagram illustrating an example downlink control information (DCI) format, according to aspects of the present disclosure.
  • DCI downlink control information
  • FIG. 4 illustrates a transmission frame for a communication network according to some embodiments of the present disclosure.
  • FIG. 5 is a signaling diagram of a multiple transmission-reception point (mTRP) communication method according to some aspects of the present disclosure.
  • mTRP multiple transmission-reception point
  • FIG. 6 illustrates a block diagram of a base station (BS) according to some aspects of the present disclosure.
  • FIG. 7 illustrates a block diagram of a user equipment (UE) according to some aspects of the present disclosure.
  • FIG. 8 is a flow diagram of a wireless communication method according to some aspects of the present disclosure.
  • FIG. 9 is a diagram illustrating an example disaggregated BS architecture according to some aspects of the present disclosure.
  • wireless communications systems also referred to as wireless communications networks.
  • the techniques and apparatus may be used for wireless communication networks such as code division multiple access (CDMA) networks, time division multiple access (TDMA) networks, frequency division multiple access (FDMA) networks, orthogonal FDMA (OFDMA) networks, single-carrier FDMA (SC-FDMA) networks, LTE networks, Global System for Mobile Communications (GSM) networks, 5 th Generation (5G) or new radio (NR) networks, as well as other communications networks.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal FDMA
  • SC-FDMA single-carrier FDMA
  • LTE Long Term Evolution
  • GSM Global System for Mobile Communications
  • 5G 5 th Generation
  • NR new radio
  • An OFDMA network may implement a radio technology such as evolved UTRA (E-UTRA) , Institute of Electrical and Electronics Engineers (IEEE) 802.11, IEEE 802.16, IEEE 802.20, flash-OFDM and the like.
  • E-UTRA evolved UTRA
  • IEEE Institute of Electrical and Electronics Engineers
  • GSM Global System for Mobile communications
  • LTE long term evolution
  • UTRA, E-UTRA, GSM, UMTS and LTE are described in documents provided from an organization named “3rd Generation Partnership Project” (3GPP)
  • cdma2000 is described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) .
  • 3GPP 3rd Generation Partnership Project
  • 3GPP long term evolution LTE
  • LTE long term evolution
  • the 3GPP may define specifications for the next generation of mobile networks, mobile systems, and mobile devices.
  • the present disclosure is concerned with the evolution of wireless technologies from LTE, 4G, 5G, NR, and beyond with shared access to wireless spectrum between networks using a collection of new and different radio access technologies or radio air interfaces.
  • 5G networks contemplate diverse deployments, diverse spectrum, and diverse services and devices that may be implemented using an OFDM-based unified, air interface.
  • further enhancements to LTE and LTE-A are considered in addition to development of the new radio technology for 5G NR networks.
  • the 5G NR will be capable of scaling to provide coverage (1) to a massive Internet of things (IoTs) with an Ultra-high density (e.g., ⁇ 1M nodes/km 2 ) , ultra-low complexity (e.g., ⁇ 10s of bits/sec) , ultra-low energy (e.g., ⁇ 10+ years of battery life) , and deep coverage with the capability to reach challenging locations; (2) including mission-critical control with strong security to safeguard sensitive personal, financial, or classified information, ultra-high reliability (e.g., ⁇ 99.9999%reliability) , ultra-low latency (e.g., ⁇ 1 ms) , and users with wide ranges of mobility or lack thereof; and (3) with enhanced mobile broadband including extreme high capacity (e.g., ⁇ 10 Tbps/km 2 ) , extreme data rates (e.g., multi-Gbps rate, 100+ Mbps user experienced rates) , and deep awareness with advanced discovery and optimizations.
  • IoTs Internet of things
  • a 5G NR communication system may be implemented to use optimized OFDM-based waveforms with scalable numerology and transmission time interval (TTI) ; having a common, flexible framework to efficiently multiplex services and features with a dynamic, low-latency time division duplex (TDD) /frequency division duplex (FDD) design; and with advanced wireless technologies, such as massive multiple input, multiple output (MIMO) , robust millimeter wave (mmWave) transmissions, advanced channel coding, and device-centric mobility.
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • FDD frequency division duplex
  • MIMO massive multiple input, multiple output
  • mmWave millimeter wave
  • Scalability of the numerology in 5G NR with scaling of subcarrier spacing, may efficiently address operating diverse services across diverse spectrum and diverse deployments.
  • subcarrier spacing may occur with 15 kHz, for example over 5, 10, 20 MHz, and the like bandwidth (BW) .
  • BW bandwidth
  • subcarrier spacing may occur with 30 kHz over 80/100 MHz BW.
  • the subcarrier spacing may occur with 60 kHz over a 160 MHz BW.
  • subcarrier spacing may occur with 120 kHz over a 500 MHz BW.
  • frequency bands for 5G NR are separated into multiple different frequency ranges, a frequency range one (FR1) , a frequency range two (FR2) , and FR2x.
  • FR1 bands include frequency bands at 7 GHz or lower (e.g., between about 410 MHz to about 7125 MHz) .
  • FR2 bands include frequency bands in mmWave ranges between about 24.25 GHz and about 52.6 GHz.
  • FR2x bands include frequency bands in mmWave ranges between about 52.6 GHz to about 71 GHz. The mmWave bands may have a shorter range, but a higher bandwidth than the FR1 bands.
  • 5G NR may support different sets of subcarrier spacing for different frequency ranges.
  • the scalable numerology of the 5G NR facilitates scalable TTI for diverse latency and quality of service (QoS) requirements. For example, shorter TTI may be used for low latency and high reliability, while longer TTI may be used for higher spectral efficiency.
  • QoS quality of service
  • 5G NR also contemplates a self-contained integrated subframe design with UL/DL scheduling information, data, and acknowledgement in the same subframe.
  • the self-contained integrated subframe supports communications in unlicensed or contention-based shared spectrum, adaptive UL/downlink that may be flexibly configured on a per-cell basis to dynamically switch between UL and downlink to meet the current traffic needs.
  • a network node a network entity, a mobility element of a network, a radio access network (RAN) node, a core network node, a network element, or a network equipment, such as a base station (BS) , or one or more units (or one or more components) performing base station functionality, may be implemented in an aggregated or disaggregated architecture.
  • RAN radio access network
  • BS base station
  • one or more units (or one or more components) performing base station functionality may be implemented in an aggregated or disaggregated architecture.
  • a BS such as a Node B (NB) , evolved NB (eNB) , NR BS, 5G NB, access point (AP) , a transmit receive point (TRP) , or a cell, etc.
  • NB Node B
  • eNB evolved NB
  • NR BS 5G NB
  • AP access point
  • TRP transmit receive point
  • a cell etc.
  • a BS may be implemented as an aggregated base station (also known as a standalone BS or a monolithic BS) or a disaggregated base station.
  • An aggregated base station may be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node.
  • a disaggregated base station may be configured to utilize a protocol stack that is physically or logically distributed among two or more units (such as one or more central or centralized units (CUs) , one or more distributed units (DUs) , or one or more radio units (RUs) ) .
  • a CU may be implemented within a RAN node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed throughout one or multiple other RAN nodes.
  • the DUs may be implemented to communicate with one or more RUs.
  • Each of the CU, DU and RU also can be implemented as virtual units, i.e., a virtual central unit (VCU) , a virtual distributed unit (VDU) , or a virtual radio unit (VRU) .
  • VCU virtual central unit
  • VDU virtual distributed
  • Base station-type operation or network design may consider aggregation characteristics of base station functionality.
  • disaggregated base stations may be utilized in an integrated access backhaul (IAB) network, an open radio access network (O-RAN (such as the network configuration sponsored by the O-RAN Alliance) ) , or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN) ) .
  • Disaggregation may include distributing functionality across two or more units at various physical locations, as well as distributing functionality for at least one unit virtually, which can enable flexibility in network design.
  • the various units of the disaggregated base station, or disaggregated RAN architecture can be configured for wired or wireless communication with at least one other unit.
  • an aspect disclosed herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways.
  • an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein.
  • such an apparatus may be implemented or such a method may be practiced using other structure, functionality, or structure and functionality in addition to or other than one or more of the aspects set forth herein.
  • a method may be implemented as part of a system, device, apparatus, and/or as instructions stored on a computer readable medium for execution on a processor or computer.
  • an aspect may comprise at least one element of a claim.
  • a UE may be scheduled to communicate with one or more transmission reception points (TRPs) .
  • TRPs may be at different physical locations.
  • the TRPs may be co-located.
  • the communications transmitted by the TRPs may be transmitted in a same logical cell, including the same frequency resources, for example.
  • a DCI from one of the TRPs may schedule communications for each of a plurality of TRPs.
  • multi-DCI (mDCI) mTRP (mTRP) communications each TRP may transmit DCI to the UE to schedule communications.
  • one or more of the serving cells may be configured for mDCI mTRP communications and one or more cells may be configured for single-DCI mTRP communications or single TRP communications.
  • a cell may be configured for mDCI mTRP communications if the cell configuration indicates two CORESET pool index values and two timing advance groups (TAGs) .
  • TAGs timing advance groups
  • a mDCI mTRP cell may be configured with two CORESET pool index values and two TAG indicators.
  • a single-DCI mTRP cell or single-TRP cell configuration may indicate a single TAG indicator and/or a single CORESET pool index value.
  • simultaneous DL and/or UL communications associated with different TRPs may be multiplexed by time domain multiplexing (TDM) , frequency domain multiplexing (FDM) , and/or spatial domain multiplexing (SDM) .
  • TDM time domain multiplexing
  • FDM frequency domain multiplexing
  • SDM spatial domain multiplexing
  • a UE may use the same frequency and time resources to transmit and/or receive mTRP communications using distinct spatial filters for each communication.
  • a spatial filter may refer to a scheme or configuration enabled for an array of antenna elements to adjust the phase of signals from each antenna element to create a focused beam oriented along a plane or axis. The process of phase shifting to create the focused beam may be referred to as beam forming.
  • the UE may use two different spatial filters to transmit and/or receive communications simultaneously to different TRPs.
  • the UE may use different antenna panels or antenna arrays to perform the simultaneous transmissions.
  • the spatial filtering may be transparent to the receiving device such that the receiving device need not know the spatial configuration of the received beam to process and decode the received signal.
  • the transmitting device may indicate the beam configuration to the receiving device for processing, filtering, etc.
  • a beam indication may inform the receiving device that, for example, a PUSCH is transmitted using the same spatial filter as the corresponding UL reference signal transmitted therewith (e.g., demodulation reference signal (DMRS) ) .
  • DMRS demodulation reference signal
  • the transmitting device may indicate the beam parameters or characteristics with one or more transmission configuration indicator (TCI) states.
  • TCI state may indicate information about a reference signal and/or the spatial characteristics of a beam.
  • a wireless communication device may be configured with several candidate TCI states.
  • a subset of the candidate TCI states may be activated or assigned for different DL and/or UL resources.
  • TCI states, as well as other beam parameters, may be dynamically indicated between a UE and a TRP, for example.
  • the network via a TRP, may indicate a TCI state for a DL communication in DCI.
  • the network may indicate a TCI state to be used for a scheduled UL communication in the scheduling DCI, for example.
  • mTRP communications may be scheduled by sDCI or by mDCI.
  • sDCI a single DCI from a single TRP may be used to schedule DL and/or UL communications from multiple TRPs.
  • the sDCI may include or indicate more than one TCI state.
  • TCI states may be indicated for each channel type, each reference signal, and/or each communication. Individual TCI state indication may have high network overhead, which decreases the efficiency of network resource usage. These effects may be exacerbated for sDCI-based mTRP communications in which more than one TCI state are indicated.
  • the present disclosure describes methods, mechanisms, and systems for unified TCI indication for mTRP UL communications.
  • the methods, schemes, and mechanisms provided herein may be applicable or suitable for SDM of mTRP UL communications in which more than one UL communication are simultaneously transmitted using the same time and frequency resources but using different spatial filters.
  • the unified TCI state indication schemes of the present application may be used to indicate beam parameters for a common beam associated with more than one UL channel and/or UL reference signal.
  • the unified TCI state schemes of the present application may include TCI state indication and beam parameter mapping for one or more physical uplink control channel (PUCCH) communications, physical uplink shared channel (PUSCH) communication, UL DMRS, phase tracking reference signals (PTRS) , channel state information reference signals (CSI-RS) , and/or any other suitable UL channel and/or reference signal.
  • PUCCH physical uplink control channel
  • PUSCH physical uplink shared channel
  • UL DMRS UL DMRS
  • phase tracking reference signals PTRS
  • CSI-RS channel state information reference signals
  • a TCI indication scheme for SDM mTRP communications may be based on a mapping of TCI states associated with different TRPs to one or more other beam parameters associated with the mTRP communications.
  • a UL channel and/or UL communication may be indicated with one or more beam parameters in addition to a TCI state, including one or more precoders or precoder matrices, a TRP switching indicator, one or more power control (PC) commands, a DMRS antenna port, one or more ranks, DMRS code division multiplexing (CDM) group indications, and/or any other suitable beam-related parameter.
  • the UE may be indicated with a single code word (CW) or two CWs for a PUSCH.
  • the network transmits a single CW with two or more TCI state indicators. For example, different layers of the same CW may be mapped to each of the two more TCI state indicators. In other aspects, two CWs may be transmitted with two TCI state indicators. For example, each CW may be mapped to one of two TCI state indicators.
  • the schemes and mechanisms of the present disclosure advantageously facilitate multi-panel simultaneous transmission of UL mTRP communications. Accordingly, the throughput and/or reliability of UL communications may be increased. Further, the unified TCI indication schemes described herein may reduce network overhead so that a single DCI may indicate multiple TCI states and so that the TCI states are mapped to other beam parameters for the UL communications.
  • FIG. 1A illustrates a wireless communication network 100 according to some aspects of the present disclosure.
  • the network 100 may be a 5G network.
  • the network 100 includes a number of base stations (BSs) 105 (individually labeled as 105a, 105b, 105c, 105d, 105e, and 105f) and other network entities.
  • a BS 105 may be a station that communicates with UEs 115 (individually labeled as 115a, 115b, 115c, 115d, 115e, 115f, 115g, 115h, and 115k) and may also be referred to as an evolved node B (eNB) , a next generation eNB (gNB) , an access point, and the like.
  • eNB evolved node B
  • gNB next generation eNB
  • Each BS 105 may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to this particular geographic coverage area of a BS 105 and/or a BS subsystem serving the coverage area, depending on the context in which the term is used.
  • a BS 105 may provide communication coverage for a macro cell or a small cell, such as a pico cell or a femto cell, and/or other types of cell.
  • a macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions with the network provider.
  • a small cell such as a pico cell, would generally cover a relatively smaller geographic area and may allow unrestricted access by UEs with service subscriptions with the network provider.
  • a small cell such as a femto cell, would also generally cover a relatively small geographic area (e.g., a home) and, in addition to unrestricted access, may also provide restricted access by UEs having an association with the femto cell (e.g., UEs in a closed subscriber group (CSG) , UEs for users in the home, and the like) .
  • a BS for a macro cell may be referred to as a macro BS.
  • a BS for a small cell may be referred to as a small cell BS, a pico BS, a femto BS or a home BS. In the example shown in FIG.
  • the BSs 105d and 105e may be regular macro BSs, while the BSs 105a-105c may be macro BSs enabled with one of three dimension (3D) , full dimension (FD) , or massive MIMO.
  • the BSs 105a-105c may take advantage of their higher dimension MIMO capabilities to exploit 3D beamforming in both elevation and azimuth beamforming to increase coverage and capacity.
  • the BS 105f may be a small cell BS which may be a home node or portable access point.
  • a BS 105 may support one or multiple (e.g., two, three, four, and the like) cells.
  • the network 100 may support synchronous or asynchronous operation.
  • the BSs may have similar frame timing, and transmissions from different BSs may be approximately aligned in time.
  • the BSs may have different frame timing, and transmissions from different BSs may not be aligned in time.
  • the UEs 115 are dispersed throughout the wireless network 100, and each UE 115 may be stationary or mobile.
  • a UE 115 may also be referred to as a terminal, a mobile station, a subscriber unit, a station, or the like.
  • a UE 115 may be a cellular phone, a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a tablet computer, a laptop computer, a cordless phone, a wireless local loop (WLL) station, or the like.
  • PDA personal digital assistant
  • WLL wireless local loop
  • a UE 115 may be a device that includes a Universal Integrated Circuit Card (UICC) .
  • a UE may be a device that does not include a UICC.
  • UICC Universal Integrated Circuit Card
  • the UEs 115 that do not include UICCs may also be referred to as IoT devices or internet of everything (IoE) devices.
  • the UEs 115a-115d are examples of mobile smart phone-type devices accessing network 100.
  • a UE 115 may also be a machine specifically configured for connected communication, including machine type communication (MTC) , enhanced MTC (eMTC) , narrowband IoT (NB-IoT) and the like.
  • MTC machine type communication
  • eMTC enhanced MTC
  • NB-IoT narrowband IoT
  • the UEs 115e-115h are examples of various machines configured for communication that access the network 100.
  • the UEs 115i-115k are examples of vehicles equipped with wireless communication devices configured for communication that access the network 100.
  • a UE 115 may be able to communicate with any type of the BSs, whether macro BS, small cell, or the like.
  • a lightning bolt e.g., communication links indicates wireless transmissions between a UE 115 and a serving BS 105, which is a BS designated to serve the UE 115 on the downlink (DL) and/or uplink (UL) , desired transmission between BSs 105, backhaul transmissions between BSs, or sidelink transmissions between UEs 115.
  • the BSs 105a-105c may serve the UEs 115a and 115b using 3D beamforming and coordinated spatial techniques, such as coordinated multipoint (CoMP) or multi-connectivity.
  • the macro BS 105d may perform backhaul communications with the BSs 105a-105c, as well as small cell, the BS 105f.
  • the macro BS 105d may also transmits multicast services which are subscribed to and received by the UEs 115c and 115d.
  • Such multicast services may include mobile television or stream video, or may include other services for providing community information, such as weather emergencies or alerts, such as Amber alerts or gray alerts.
  • the BSs 105 may also communicate with a core network.
  • the core network may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions.
  • IP Internet Protocol
  • At least some of the BSs 105 (e.g., which may be an example of a gNB or an access node controller (ANC) ) may interface with the core network through backhaul links (e.g., NG-C, NG-U, etc. ) and may perform radio configuration and scheduling for communication with the UEs 115.
  • the BSs 105 may communicate, either directly or indirectly (e.g., through core network) , with each other over backhaul links (e.g., X1, X2, etc. ) , which may be wired or wireless communication links.
  • the network 100 may also support mission critical communications with ultra-reliable and redundant links for mission critical devices, such as the UE 115e, which may be a drone. Redundant communication links with the UE 115e may include links from the macro BSs 105d and 105e, as well as links from the small cell BS 105f.
  • UE 115f e.g., a thermometer
  • UE 115g e.g., smart meter
  • UE 115h e.g., wearable device
  • the network 100 may also provide additional network efficiency through dynamic, low-latency TDD/FDD communications, such as vehicle-to-vehicle (V2V) , vehicle-to-everything (V2X) , cellular V2X (C-V2X) communications between a UE 115i, 115j, or 115k and other UEs 115, and/or vehicle-to-infrastructure (V2I) communications between a UE 115i, 115j, or 115k and a BS 105.
  • V2V vehicle-to-vehicle
  • V2X vehicle-to-everything
  • C-V2X cellular V2X
  • V2I vehicle-to-infrastructure
  • the network 100 utilizes OFDM-based waveforms for communications.
  • An OFDM-based system may partition the system BW into multiple (K) orthogonal subcarriers, which are also commonly referred to as subcarriers, tones, bins, or the like. Each subcarrier may be modulated with data.
  • the subcarrier spacing between adjacent subcarriers may be fixed, and the total number of subcarriers (K) may be dependent on the system BW.
  • the system BW may also be partitioned into subbands.
  • the subcarrier spacing and/or the duration of TTIs may be scalable.
  • the BSs 105 can assign or schedule transmission resources (e.g., in the form of time-frequency resource blocks (RB) ) for downlink (DL) and uplink (UL) transmissions in the network 100.
  • DL refers to the transmission direction from a BS 105 to a UE 115
  • UL refers to the transmission direction from a UE 115 to a BS 105.
  • the communication can be in the form of radio frames.
  • a radio frame may be divided into a plurality of subframes or slots, for example, about 10. Each slot may be further divided into mini-slots. In a FDD mode, simultaneous UL and DL transmissions may occur in different frequency bands.
  • each subframe includes an UL subframe in an UL frequency band and a DL subframe in a DL frequency band.
  • UL and DL transmissions occur at different time periods using the same frequency band.
  • a subset of the subframes (e.g., DL subframes) in a radio frame may be used for DL transmissions and another subset of the subframes (e.g., UL subframes) in the radio frame may be used for UL transmissions.
  • each DL or UL subframe may have pre-defined regions for transmissions of reference signals, control information, and data.
  • Reference signals are predetermined signals that facilitate the communications between the BSs 105 and the UEs 115.
  • a reference signal can have a particular pilot pattern or structure, where pilot tones may span across an operational BW or frequency band, each positioned at a pre-defined time and a pre-defined frequency.
  • a BS 105 may transmit cell specific reference signals (CRSs) and/or channel state information –reference signals (CSI-RSs) to enable a UE 115 to estimate a DL channel.
  • CRSs cell specific reference signals
  • CSI-RSs channel state information –reference signals
  • a UE 115 may transmit sounding reference signals (SRSs) to enable a BS 105 to estimate an UL channel.
  • Control information may include resource assignments and protocol controls.
  • Data may include protocol data and/or operational data.
  • the BSs 105 and the UEs 115 may communicate using self-contained subframes.
  • a self-contained subframe may include a portion for DL communication and a portion for UL communication.
  • a self-contained subframe can be DL-centric or UL-centric.
  • a DL-centric subframe may include a longer duration for DL communication than for UL communication.
  • an UL-centric subframe may include a longer duration for UL communication than for UL communication.
  • the network 100 may be an NR network deployed over a licensed spectrum.
  • the BSs 105 can transmit synchronization signals (e.g., including a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) ) in the network 100 to facilitate synchronization.
  • the BSs 105 can broadcast system information associated with the network 100 (e.g., including a master information block (MIB) , remaining system information (RMSI) , and other system information (OSI) ) to facilitate initial network access.
  • MIB master information block
  • RMSI remaining system information
  • OSI system information
  • the BSs 105 may broadcast the PSS, the SSS, and/or the MIB in the form of synchronization signal block (SSBs) and may broadcast the RMSI and/or the OSI over a physical downlink shared channel (PDSCH) .
  • the MIB may be transmitted over a physical broadcast channel (PBCH) .
  • PBCH physical broadcast channel
  • a UE 115 attempting to access the network 100 may perform an initial cell search by detecting a PSS from a BS 105.
  • the PSS may enable synchronization of period timing and may indicate a physical layer identity value.
  • the UE 115 may then receive a SSS.
  • the SSS may enable radio frame synchronization, and may provide a cell identity value, which may be combined with the physical layer identity value to identify the cell.
  • the PSS and the SSS may be located in a central portion of a carrier or any suitable frequencies within the carrier.
  • the UE 115 may receive a MIB.
  • the MIB may include system information for initial network access and scheduling information for RMSI and/or OSI.
  • the UE 115 may receive RMSI and/or OSI.
  • the RMSI and/or OSI may include radio resource control (RRC) information related to random access channel (RACH) procedures, paging, control resource set (CORESET) for physical downlink control channel (PDCCH) monitoring, physical UL control channel (PUCCH) , physical UL shared channel (PUSCH) , power control, and SRS.
  • RRC radio resource control
  • the UE 115 can perform a random access procedure to establish a connection with the BS 105.
  • the random access procedure may be a four-step random access procedure.
  • the UE 115 may transmit a random access preamble and the BS 105 may respond with a random access response.
  • the random access response (RAR) may include a detected random access preamble identifier (ID) corresponding to the random access preamble, timing advance (TA) information, an UL grant, a temporary cell-radio network temporary identifier (C-RNTI) , and/or a backoff indicator.
  • ID detected random access preamble identifier
  • TA timing advance
  • C-RNTI temporary cell-radio network temporary identifier
  • the UE 115 may transmit a connection request to the BS 105 and the BS 105 may respond with a connection response.
  • the connection response may indicate a contention resolution.
  • the random access preamble, the RAR, the connection request, and the connection response can be referred to as message 1 (MSG1) , message 2 (MSG2) , message 3 (MSG3) , and message 4 (MSG4) , respectively.
  • the random access procedure may be a two-step random access procedure, where the UE 115 may transmit a random access preamble and a connection request in a single transmission and the BS 105 may respond by transmitting a random access response and a connection response in a single transmission.
  • the UE 115 and the BS 105 can enter a normal operation stage, where operational data may be exchanged.
  • the BS 105 may schedule the UE 115 for UL and/or DL communications.
  • the BS 105 may transmit UL and/or DL scheduling grants to the UE 115 via a PDCCH.
  • the scheduling grants may be transmitted in the form of DL control information (DCI) .
  • the BS 105 may transmit a DL communication signal (e.g., carrying data) to the UE 115 via a PDSCH according to a DL scheduling grant.
  • the UE 115 may transmit an UL communication signal to the BS 105 via a PUSCH and/or PUCCH according to an UL scheduling grant.
  • the connection may be referred to as an RRC connection.
  • the UE 115 is actively exchanging data with the BS 105, the UE 115 is in an RRC connected state.
  • the UE 115 may initiate an initial network attachment procedure with the network 100.
  • the BS 105 may coordinate with various network entities or fifth generation core (5GC) entities, such as an access and mobility function (AMF) , a serving gateway (SGW) , and/or a packet data network gateway (PGW) , to complete the network attachment procedure.
  • 5GC fifth generation core
  • AMF access and mobility function
  • SGW serving gateway
  • PGW packet data network gateway
  • the BS 105 may coordinate with the network entities in the 5GC to identify the UE, authenticate the UE, and/or authorize the UE for sending and/or receiving data in the network 100.
  • the AMF may assign the UE with a group of tracking areas (TAs) .
  • TAs tracking areas
  • the UE 115 can move around the current TA.
  • the BS 105 may request the UE 115 to update the network 100 with the UE 115’s location periodically.
  • the UE 115 may only report the UE 115’s location to the network 100 when entering a new TA.
  • the TAU allows the network 100 to quickly locate the UE 115 and page the UE 115 upon receiving an incoming data packet or call for the UE 115.
  • the BS 105 may communicate with a UE 115 using hybrid automatic repeat request (HARQ) techniques to improve communication reliability, for example, to provide an ultra-reliable low latency communication (URLLC) service.
  • the BS 105 may schedule a UE 115 for a PDSCH communication by transmitting a DL grant in a PDCCH.
  • the BS 105 may transmit a DL data packet to the UE 115 according to the schedule in the PDSCH.
  • the DL data packet may be transmitted in the form of a transport block (TB) . If the UE 115 receives the DL data packet successfully, the UE 115 may transmit a HARQ acknowledgement (ACK) to the BS 105.
  • HARQ hybrid automatic repeat request
  • the UE 115 may transmit a HARQ non-acknowledgement (NACK) to the BS 105.
  • NACK non-acknowledgement
  • the BS 105 may retransmit the DL data packet to the UE 115.
  • the retransmission may include the same coded version of DL data as the initial transmission.
  • the retransmission may include a different coded version of the DL data than the initial transmission.
  • the UE 115 may apply soft combining to combine the encoded data received from the initial transmission and the retransmission for decoding.
  • the BS 105 and the UE 115 may also apply HARQ for UL communications using substantially similar mechanisms as the DL HARQ.
  • the network 100 may operate over a system BW or a component carrier (CC) BW.
  • the network 100 may partition the system BW into multiple BWPs (e.g., portions) .
  • a BS 105 may dynamically assign a UE 115 to operate over a certain BWP (e.g., a certain portion of the system BW) .
  • the assigned BWP may be referred to as the active BWP.
  • the UE 115 may monitor the active BWP for signaling information from the BS 105.
  • the BS 105 may schedule the UE 115 for UL or DL communications in the active BWP.
  • a BS 105 may assign a pair of BWPs within the CC to a UE 115 for UL and DL communications.
  • the BWP pair may include one BWP for UL communications and one BWP for DL communications.
  • the network 100 may operate over a shared channel, which may include shared frequency bands and/or unlicensed frequency bands.
  • the network 100 may be an NR-U network operating over an unlicensed frequency band.
  • the BSs 105 and the UEs 115 may be operated by multiple network operating entities.
  • the BSs 105 and the UEs 115 may employ a listen-before-talk (LBT) procedure to monitor for transmission opportunities (TXOPs) in the shared channel.
  • TXOP may also be referred to as COT.
  • LBT listen-before-talk
  • the goal of LBT is to protect reception at a receiver from interference.
  • a transmitting node may perform an LBT prior to transmitting in the channel.
  • the transmitting node may proceed with the transmission.
  • the transmitting node may refrain from transmitting in the channel.
  • An LBT can be based on energy detection (ED) or signal detection.
  • ED energy detection
  • the LBT results in a pass when signal energy measured from the channel is below a threshold. Conversely, the LBT results in a failure when signal energy measured from the channel exceeds the threshold.
  • the LBT results in a pass when a channel reservation signal (e.g., a predetermined preamble signal) is not detected in the channel.
  • a channel reservation signal e.g., a predetermined preamble signal
  • an LBT may be in a variety of modes.
  • An LBT mode may be, for example, a category 4 (CAT4) LBT, a category 2 (CAT2) LBT, or a category 1 (CAT1) LBT.
  • a CAT1 LBT is referred to a no LBT mode, where no LBT is to be performed prior to a transmission.
  • a CAT2 LBT refers to an LBT without a random backoff period.
  • a transmitting node may determine a channel measurement in a time interval and determine whether the channel is available or not based on a comparison of the channel measurement against a ED threshold.
  • a CAT4 LBT refers to an LBT with a random backoff and a variable contention window (CW) . For instance, a transmitting node may draw a random number and backoff for a duration based on the drawn random number in a certain time unit.
  • CW variable contention window
  • FIG. 1B shows a diagram illustrating an example disaggregated base station 102 architecture.
  • the disaggregated base station 102 architecture may include one or more central units (CUs) 150 that can communicate directly with a core network 104 via a backhaul link, or indirectly with the core network 104 through one or more disaggregated base station units (such as a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC) 125 via an E2 link, or a Non-Real Time (Non-RT) RIC 145 associated with a Service Management and Orchestration (SMO) Framework 135, or both) .
  • a CU 150 may communicate with one or more distributed units (DUs) 130 via respective midhaul links, such as an F1 interface.
  • DUs distributed units
  • the DUs 130 may communicate with one or more radio units (RUs) 140 via respective fronthaul links.
  • the RUs 140 may communicate with respective UEs 120 via one or more radio frequency (RF) access links.
  • RF radio frequency
  • the UE 120 may be simultaneously served by multiple RUs 140.
  • Each of the units may include one or more interfaces or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via a wired or wireless transmission medium.
  • Each of the units, or an associated processor or controller providing instructions to the communication interfaces of the units can be configured to communicate with one or more of the other units via the transmission medium.
  • the units can include a wired interface configured to receive or transmit signals over a wired transmission medium to one or more of the other units.
  • the units can include a wireless interface, which may include a receiver, a transmitter or transceiver (such as a RF transceiver) , configured to receive or transmit signals, or both, over a wireless transmission medium to one or more of the other units.
  • a wireless interface which may include a receiver, a transmitter or transceiver (such as a RF transceiver) , configured to receive or transmit signals, or both, over a wireless transmission medium to one or more of the other units.
  • the CU 150 may host one or more higher layer control functions. Such control functions can include radio resource control (RRC) , packet data convergence protocol (PDCP) , service data adaptation protocol (SDAP) , or the like. Each control function can be implemented with an interface configured to communicate signals with other control functions hosted by the CU 150.
  • the CU 150 may be configured to handle user plane functionality (i.e., Central Unit –User Plane (CU-UP) ) , control plane functionality (i.e., Central Unit –Control Plane (CU-CP) ) , or a combination thereof.
  • the CU 150 can be logically split into one or more CU-UP units and one or more CU-CP units.
  • the CU-UP unit can communicate bidirectionally with the CU-CP unit via an interface, such as the E1 interface when implemented in an O-RAN configuration.
  • the CU 150 can be implemented to communicate with the DU 130, as necessary, for network control and signaling.
  • the DU 130 may correspond to a logical unit that includes one or more base station functions to control the operation of one or more RUs 140.
  • the DU 130 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, or the like) depending, at least in part, on a functional split, such as those defined by the 3rd Generation Partnership Project (3GPP) .
  • the DU 130 may further host one or more low PHY layers. Each layer (or module) can be implemented with an interface configured to communicate signals with other layers (and modules) hosted by the DU 130, or with the control functions hosted by the CU 150.
  • Lower-layer functionality can be implemented by one or more RUs 140.
  • an RU 140 controlled by a DU 130, may correspond to a logical node that hosts RF processing functions, or low-PHY layer functions (such as performing fast Fourier transform (FFT) , inverse FFT (iFFT) , digital beamforming, physical random access channel (PRACH) extraction and filtering, or the like) , or both, based at least in part on the functional split, such as a lower layer functional split.
  • the RU (s) 140 can be implemented to handle over the air (OTA) communication with one or more UEs.
  • OTA over the air
  • real-time and non-real-time aspects of control and user plane communication with the RU (s) 140 can be controlled by the corresponding DU 130.
  • this configuration can enable the DU (s) 130 and the CU 150 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.
  • the SMO Framework 135 may be configured to support RAN deployment and provisioning of non-virtualized and virtualized network elements.
  • the SMO Framework 135 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements which may be managed via an operations and maintenance interface (such as an O1 interface) .
  • the SMO Framework 135 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 190) 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) 190
  • network element life cycle management such as to instantiate virtualized network elements
  • a cloud computing platform interface such as an O2 interface
  • Such virtualized network elements can include, but are not limited to, CUs 150, DUs 130, RUs 140 and Near-RT RICs 125.
  • the SMO Framework 135 can communicate with a hardware aspect of a 4G RAN, such as an open eNB (O-eNB) 111, via an O1 interface. Additionally, in some implementations, the SMO Framework 135 can communicate directly with one or more RUs 140 via an O1 interface.
  • the SMO Framework 135 also may include a Non-RT RIC 145 configured to support functionality of the SMO Framework 135.
  • the Non-RT RIC 145 may be configured to include a logical function that enables non-real-time control and optimization of RAN elements and resources, Artificial Intelligence/Machine Learning (AI/ML) workflows including model training and updates, or policy-based guidance of applications/features in the Near-RT RIC 125.
  • the Non-RT RIC 145 may be coupled to or communicate with (such as via an A1 interface) the Near-RT RIC 125.
  • the Near-RT RIC 125 may be configured to include a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions over an interface (such as via an E2 interface) connecting one or more CUs 150, one or more DUs 130, or both, as well as an O-eNB, with the Near-RT RIC 125.
  • the Non-RT RIC 145 may receive parameters or external enrichment information from external servers. Such information may be utilized by the Near-RT RIC 125 and may be received at the SMO Framework 135 or the Non-RT RIC 145 from non-network data sources or from network functions.
  • the Non-RT RIC 145 or the Near-RT RIC 125 may be configured to tune RAN behavior or performance.
  • the Non-RT RIC 145 may monitor long-term trends and patterns for performance and employ AI/ML models to perform corrective actions through the SMO Framework 135 (such as reconfiguration via O1) or via creation of RAN management policies (such as A1 policies) .
  • one or more of the UEs 115 may be configured to communicate with two or more of the BSs 105 in a multi-transmission-reception point (mTRP) communication scenario.
  • a UE 115 may be configured with a first frequency band or cell, where the cell is configured for communications on more than one TRP.
  • the UE 115 may receive DL communications (e.g., DCI, PDSCH, DL reference signals) from each TRP.
  • the UE 115 may also transmit UL communications to one or more of the TRPs.
  • FIG. 2 illustrates a multiple transmission-reception point (mTRP) communication scenario 200 according to aspects of the present disclosure.
  • the communication scenario 200 involves a first TRP 205a, a second TRP 205b, and a UE 215.
  • one or both of the TRPs 205 may be one or more of the BSs 105 of the network 100.
  • one or both of the TRPs 205 may be another type of wireless node or wireless communication device configured for communication with one or more UEs in a network.
  • the UE 215 may be one of the UEs 115 of the network 100. For simplicity, FIG.
  • the TRPs 205 and the UE 215 communicate with each other over at least one radio frequency band.
  • the TRPs 205 may be configured to communicate with the UE 215 on one or more cells corresponding to one or more frequency bands.
  • each of the one or more cells corresponds to a component carrier (CC) .
  • each of the one or more cells corresponds to a bandwidth part (BWP) .
  • the one or more cells may include a primary cell (PCell) or special cell (SpCell) .
  • one or both of the TRPs 205 may be capable of generating a number of directional transmission beams in a number of beam or spatial directions (e.g., about 2, 4, 8, 16, 32, 64 or more) and may select a certain transmission beam or beam direction to communicate with the UE 215 based on the location of the UE 215 in relation to the location of the TRPs 205 and/or any other environmental factors such as reflectors and/or scatterers in the surrounding.
  • the second TRP 205b may select a transmission beam that provides a best quality (e.g., with the highest receive signal strength) for transmission to the UE 215.
  • the TRP 205b may also select a reception beam that provides a best quality (e.g., with the highest receive signal strength) for reception from the UE 215. As illustrated in FIG. 2, the TRP 205b may generate three beams 204a, 204b, and 204c. The TRP 205b may determine that it may utilize the beam 204b or the beam 204c to communicate with the UE 215, for example, based on a beam discovery or beam selection procedure.
  • a best quality e.g., with the highest receive signal strength
  • one or both of the TRPs 205 may schedule the UE 215 for an UL communication or a DL communication over a frequency band.
  • a frequency band may include a component carrier (CC) and/or a bandwidth part (BWP) , for example.
  • CC component carrier
  • BWP bandwidth part
  • a DCI from one of the TRPs e.g., TRP 205a
  • TRP 205a may schedule communications for the first TRP 205a and the second TRP 205b.
  • mDCI multi-DCI
  • each TRP 205 may transmit DCI to the UE 215 to schedule communications.
  • a UE 215 may be configured with carrier aggregation to communicate with one or both of the TRPs 205 using one or more serving cells.
  • the serving cells may include, for example, a primary cell (PCell) , one or more secondary cells (SCells) , a PUCCH secondary cell (PSCell) , and/or a special cell (SpCell) .
  • one or more of the serving cells may be configured for mDCI mTRP communications, and one or more cells may be configured for single-TRP communications.
  • a cell may be configured for mDCI mTRP communications if the cell configuration indicates two CORESET pool index values and two timing advance groups (TAGs) .
  • TAGs timing advance groups
  • a mDCI cell may indicate two CORESETPoolIndex values and two TAG indicators.
  • a single-TRP cell configuration may indicate a single TAG indicator and/or a single CORESETPoolIndex value.
  • a sDCI and/or a mDCI may be associated with a format, and may include one or more fields or parameters to indicate a UE with one or more parameters for a UL channel or communication.
  • a DCI may include frequency resource assignments, time resource assignments, beam-related parameters, power control parameters, and/or any other suitable or relevant information for the UE to transmit a UL communication in a UL channel.
  • FIG. 3 illustrates an example DCI format 300 with multiple fields that may be purposed with conveying a resource indicator for PUCCH and/or PUSCH configuration parameters according to some embodiments of the present disclosure.
  • Each parameter or field may be associated with a number of bits, which may be referred to as the bit size or bit width of the parameter or field.
  • DCI format 300 may be similar or identical to a DCI format 0_1 for conveying PUSCH resources and other parameters the UE 115 will use for communicating with the BS 105. It will be understood that the rows of the DCI 300 shown in FIG. 3 may not be a complete listing or representation of the fields and parameters of a DCI. For example, the DCI 300 may include fewer or more rows than are illustrated in FIG. 3.
  • the DCI 300 may include a DCI format identifier, carrier indicator, UL/supplemental UL (SUL) indicator, bandwidth part (BWP) indicator, frequency domain resource assignment, time domain resource assignment, and/or a frequency hopping flag indicating or being associated with the resources for a PUCCH and/or PUSCH, for example. Further, the DCI 300 may include a modulation and coding scheme (MCS) , new data indicator (NDI) , redundancy version (RV) , HARQ process number, 1 st DL assignment index, and/or 2 nd DL assignment index. In some aspects, the DCI 300 may further include, indicate, or be associated with a codeword (CW) configuration.
  • MCS modulation and coding scheme
  • NDI new data indicator
  • RV redundancy version
  • HARQ process number 1 st DL assignment index
  • 2 nd DL assignment index HARQ process number
  • the DCI 300 may indicate a single CW or multiple CWs for a PUSCH.
  • the DCI 300 may indicate two MCS, NDI, and/or RV values.
  • the DCI 300 may indicate a single MCS and NDI value, but different RV values.
  • a RV value indicated in the DCI 300 may be associated with the first CW, and a RV offset value may be associated with or configured for the second CW.
  • the DCI 300 may include or indicate a power control (PC) command.
  • the DCI 300 may indicate a transmit power control (TPC) command.
  • the DCI 300 may indicate more than one PC command.
  • the DCI 300 may include or indicate two PC command values, where each PC command value may be mapped to one TCI value, as explained further below.
  • only one PC command value is included in the DCI 300.
  • the DCI 300 may further include a SRS resource indicator (SRI) , and precoding information.
  • the precoding information may comprise at least one transmit precoding matrix index (TPMI) field or value.
  • the precoding information may include or indicate a single precoder or precoding matrix index.
  • the precoding information may include or indicate two precoders or precoding matrix indices.
  • the DCI 300 may further include or indicate a number of antenna ports, such as DMRS antenna ports.
  • the DMRS antenna port indication may indicate at least two DMRS code division multiplexing (CDM) groups.
  • the DCI 300 may include or indicate a SRS request field and/or a channel state information (CSI) request field.
  • the DCI 300 further includes a code block group transmission information field (CBGTI) , and/or a phase tracking reference signal (PTRS) -DMRS association field.
  • CBGTI code block group transmission information field
  • PTRS phase tracking reference signal
  • the DCI 300 may further include a TCI codepoint field indicating one or more TCI codepoints associated with the PUSCH indicated by the DCI 300.
  • the TCI codepoint may indicate a matrix or subset of TCI candidate states.
  • a UE may be configured with several candidate TCI states. The UE may then be indicated with an activation for one or more of the plurality of candidate TCI states.
  • the UE may be activated with one or more TCI codepoints, where each TCI codepoint indicates a matrix, list, or subset of the candidate TCI states.
  • the TCI codepoint indicated in the TCI codepoint field may indicate a first CI state and a second state.
  • the first TCI state and the second the state may be associated with different spatial filters.
  • the first TCI state may be associated with a first TRP
  • the second TCI state may be associated with a second TRP.
  • one or more fields of the DCI 300 may be used by a UE for mTRP-based communications to one or more TRPs.
  • a UE e.g., UE 115
  • the first UL communication and the second UL communication may correspond to a same UL channel.
  • the UE may simultaneously transmit the UL communications using spatial domain multiplexing (SDM) , such that the same time and frequency resources are used for each UL communication but transmitted using different antenna panels and/or different spatial filters.
  • SDM spatial domain multiplexing
  • the parameters or values of the fields of the DCI 300 may be selected or determined by the network (e.g., network entity, BS 105, etc. ) based on a configured mapping of one or more of the parameters to each of the two TCI states associated with the TCI codepoint, for example.
  • the network e.g., network entity, BS 105, etc.
  • Schemes and mechanisms for unified TCI state indication and mapping to other UL channel indications are discussed further below with respect to FIG. 5.
  • FIG. 4 is a timing diagram illustrating a transmission frame structure 400 according to some embodiments of the present disclosure.
  • the transmission frame structure 400 may be employed by BSs such as the BSs 105 and UEs such as the UEs 115 in a network such as the network 100 for communications.
  • the BS may communicate with the UE using time-frequency resources configured as shown in the transmission frame structure 400.
  • the x-axes represent time in some arbitrary units and the y-axes represent frequency in some arbitrary units.
  • the transmission frame structure 400 includes a radio frame 402.
  • the duration of the radio frame 402 may vary depending on the embodiments. In an example, the radio frame 402 may have a duration of about ten milliseconds.
  • the radio frame 402 includes M number of subframes 404, where M may be any suitable positive integer. In an example, M may be about 10.
  • Each subframe 404 may contain N slots 406, where N is any suitable positive number including 1.
  • Each slot 406 includes a number of subcarriers 418 in frequency and a number of symbols 416 in time.
  • the number of subcarriers 418 and/or the number of symbols 416 in a slot 406 may vary depending on the embodiments, for example, based on the channel bandwidth, the subcarrier spacing (SCS) , and/or the cyclic prefix (CP) mode.
  • One subcarrier 418 in frequency and one symbol 416 in time forms one resource element (RE) 420 for transmission.
  • RE resource element
  • a BS may schedule a UE (e.g., UE 115 in FIG. 1A) for UL and/or DL communications at a time-granularity of slots 406.
  • a BS 105 may schedule a UE 115 to monitor for PDCCH transmissions by instantiating a search space associated with a CORESET 412.
  • the search space may also be instantiated with associated CORESET 414.
  • FIG. 4 illustrates two CORESETs, 412 and 414, for purposes of simplicity of illustration and discussion, it will be recognized that embodiments of the present disclosure may scale to many more CORESETs, for example, about 3, 4 or more.
  • Each CORESET may include a set of resources spanning a certain number of subcarriers 418 and a number of symbols 416 (e.g., about 1, 2, or 3) within a slot 406.
  • a number of symbols 416 e.g., about 1, 2, or 3
  • Each CORESET has an associated control channel element (CCE) to resource element group (REG) mapping.
  • a REG may include a group of REs 420.
  • the CCE defines how DL control channel data may be transmitted.
  • a BS 105 may configure a UE 115 with one or more search spaces by associating a CORESET 412 with a starting position (e.g., a starting slot 406) , a symbol 416 location within a slot 406, a periodicity or a time pattern, and candidate mapping rules.
  • a search space may include a set of candidates mapped to CCEs with aggregation levels of 1, 4, 4, 8, and/or 12 CCEs.
  • a search space may include the CORESET 412 starting at the first symbol 416 indexed within a starting slot 406.
  • the search space may also include the CORESET 414 starting at a later symbol index within the starting slot 406.
  • the exemplary search space may have a periodicity of about five slots and may have candidates at aggregation levels of 1, 4, 4, and/or 8.
  • the UE 115 may perform blind decoding in the search spaces to search for DL control information (e.g., slot format information and/or scheduling information) from the BS.
  • DL control information e.g., slot format information and/or scheduling information
  • the UE may search a subset of the search spaces based on certain rules, for example, associated with the UE’s channel estimation and/or blind decoding capabilities.
  • One such example of DL control information the UE 115 may be blind decoding for is a PDCCH from the BS 105.
  • CORESET 412 and CORESET 414 may be at different frequencies from each other.
  • the CORESETs can be non-contiguous as shown, or they may be contiguous.
  • the frequency ranges of CORESET 412 and CORESET 414 may overlap or not (e.g., as illustrated in FIG. 4, the frequency ranges partially overlap, and therefore are different from each other) .
  • the frequency offset between the CORESETs is a multiple of six RBs, or some other offset.
  • each of CORESET 412 and CORESET 414 may carry a different PDCCH transmission (or none at all, though part of the search space for the UE 115) .
  • CORESET 412 and CORESET 414 can have other characteristics which are different from each other than just frequency (or instead of frequency) . For example, they can differ in CCE-to-REG mapping and/or REG bundling. Or, they can also be associated with different TCI states, thereby being associated with different beams. In addition, the CCE index of a PDCCH monitoring occasion may be different across CORESETs. Other forms of diversity between CORESETs could be achieved as well, including some combination of differing characteristics (such as all of the above differences together or a subset thereof) .
  • FIG. 5 is a signaling diagram illustrating a mTRP communication method 500 according to some aspects of the present disclosure.
  • the method 500 is employed by a first TRP (TRP1) , a second TRP (TRP2) , and a UE 515.
  • TRP1 TRP
  • TRP2 TRP2
  • UE 515 a UE 515.
  • one or both of the TRPs may be one of the BSs 105 in the network 100.
  • one or both of the TRPs may be another type of wireless node or connection point.
  • the TRPs may be referred to as network devices or network entities.
  • one or both of the TRPs may include an aggregated BS and/or one or more portions of a disaggregated BS, as described above with respect to FIG. 1B.
  • the UE 515 may be one of the UEs 115 of the network 100.
  • the UE 515 may be configured for mTRP communications with both TRP1 and TRP2.
  • the UE 515 may be configured for mTRP communications with more than two TRPs, including three, four, five, six, and/or any other suitable number of TRPs.
  • the UE 515 may be configured for single-DCI mTRP communications, or multi-DCI (mDCI) mTRP communications.
  • mDCI multi-DCI
  • the UE 515 may receive scheduling DCI from one of TRP1 or TRP2 for DL and/or UL communications communicated with both TRP 1 and TRP 2.
  • TRP1 may transmit sDCI to the UE 515 to schedule communications for TRP1 and TRP2.
  • the UE 515 may be indicated with one or more TCI states associated with each of TRP1 and TRP2. Accordingly, in the sDCI scenario, a single DCI may indicate TCI states for both TRPs.
  • the UE 515 may receive control information, such as DCI, indicating a first TCI state and a second TCI state.
  • control information such as DCI
  • the UE 515 may map the indicated TCI states to one or more other beam-related parameters simultaneous SDM-based mTRP communications as explained further below.
  • TRP1 transmits, to the UE 515, a TCI configuration.
  • the TCI configuration may include or indicate a TCI state list.
  • the TCI configuration may include control information activating a subset of the TCI state list.
  • the subsets of TCI states activated may be associated with a plurality of TCI codepoints or TCI codepoint matrices. The network may select or indicate one or more of the TCI codepoints as explained further below.
  • TRP1 transmits, to the UE 515, first control information associated with an uplink (UL) communication.
  • the first control information may include one or more beam parameters.
  • the first control information comprises a first DCI.
  • the first control information comprises a RRC message indicating one or more beam-related parameters or beam configurations.
  • the control information may include DCI comprising one or more of the fields of the DCI 300 shown in FIG. 3.
  • the control information comprises a DCI format 0_1 or a DCI format 0_2.
  • the one or more beam parameters indicated in the control information may include one or more power control (PC) commands, one or more DMRS antenna port indications, one or more precoders, and/or a TRP switching indicator.
  • PC power control
  • each of the precoders may be associated with a rank.
  • the DMRS antenna port indications may be based on the one or more ranks associated with the one or more precoders.
  • TRP1 transmits, to the UE 515, second control information including a TCI codepoint indication.
  • the second control information comprises DCI.
  • the second control information comprises a beam indication DCI selecting a configured or candidate TCI codepoint.
  • the second control information comprises a MAC-CE activating the single TCI codepoint.
  • the TCI codepoint indication may indicate a first TCI state and a second TCI state.
  • the TCI codepoint indication in the control information is based on a mapping of the one or more beam parameters to the first TCI state and the second TCI state.
  • the control information comprises a DCI format 1_1, a DCI format 1_2, or other DCI format indicating the TCI codepoint based on the configured TCI state list and/or the TCI codepoint.
  • the TCI states indicated in or associated with the TCI codepoint may include one or more unified TCI states.
  • the unified TCI state (s) may include type 3 unified TCI states for two or more UL channels and/or UL reference signals.
  • the unified TCI state (s) may include type 1 and/or type 2 unified TCI states.
  • actions 502-506 may include receiving a single control element or message, or multiple control elements and/or messages.
  • actions 504 and 506 may comprise receiving a single DCI indicating the one or more beam parameters (e.g., precoder (s) , PC command (s) , DMRS antenna port indicator, etc. ) and the TCI codepoint.
  • a DCI format 0_1 may indicate both the TCI codepoint as the one or more beam parameters.
  • actions 502-506 may comprise receiving more than one DCI, MAC-CE, RRC information element (IE) , and/or a combination thereof.
  • the network and/or one or both of the TRPs may select the TCI codepoint based on the mapping.
  • the mapping may correspond to a hardcoded rule or other configuration at the network and/or one or both of the TRPs.
  • the mapping may be used to select the TCI codepoint such that the first TCI state of the TCI codepoint is mapped to a first precoder, and the second TCI state of the TCI codepoint is mapped to a second precoder.
  • the mapping may indicate or cause TRP1 to select the TCI codepoint based on a TRP switching indicator, one or more PC command fields, and/or one or more DMRS antenna port indications of the one or more beam parameters.
  • the one or more beam parameters of the first control information comprises a first precoder and a second precoder.
  • the TCI codepoint indicated in the first control information is based on a mapping of the first precoder to the first TCI state, and the second precoder to the second TCI state.
  • the one or more beam parameters comprise a first precoder and a second precoder, and the control information further comprises a TRP switching indicator.
  • the mapping of the one or more beam parameters to the first TCI state and the second TCI state is based on the TRP switching indicator.
  • the mapping may indicate that the first precoder is associated with the first TCI state, and the second precoder is associated with the second TCI state.
  • the mapping may indicate that the first precoder is associated with the second TCI state and the second precoder is associated with the first TCI state.
  • the one or more beam parameters may include or indicate a single power control (PC) command.
  • the mapping of the one or more beam parameters to the first TCI state and the second TCI state may comprise a mapping of the single PC command to each of the first TCI state and the second TCI state.
  • the control information may comprise DCI including a single PC command field.
  • the value of the single PC command field may be mapped to both TCI states of the TCI codepoint.
  • the one or more beam parameters may include a first PC command and a second PC command.
  • the first TCI state may be associated with a closed loop index of 0 and the second TCI may be associated with a closed loop index of 1.
  • the mapping of the one or more beam parameters to the first TCI and the second TCI may include a mapping of the first PC command to the first TCI and the second PC command to the second TCI state.
  • the one or more beam parameters include a first precoder and a second precoder.
  • the one or more beam parameters may further include a DMRS antenna port indication.
  • the first precoder may be associated with a first rank
  • the second precoder may be associated with a second rank.
  • the DMRS antenna port indication is associated with a third rank.
  • the third rank may be based on a sum of the first rank and the second rank.
  • the one or more beam parameters include a first precoder, a second precoder, and a DMRS antenna port indication.
  • the DMRS antenna port indication indicates a first DMRS code division multiplexing (CDM) group and a second DMRS CDM group.
  • the mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the first DMRS CDM group to the first precoder and the second DMRS CDM group to the second precoder.
  • the mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the first DMRS CDM group and the second DMRS CDM group to at least one of the first TCI state or the second TCI state.
  • the control information may further comprise or indicate a TRP switching indicator.
  • the mapping of the first DMRS CDM group and the second DMRS CDM group to the at least one of the first TCI state or the second TCI state is based on the TRP switching indicator.
  • the one or more beam parameters comprise a first precoder, a second precoder, and a DMRS antenna port indication.
  • the DMRS antenna port indication may indicate a first set of DMRS ports and a second set of DMRS ports.
  • the mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the first set of DMRS ports to the first precoder and the second set of DMRS ports to the second precoder.
  • the mapping of the one or more beam parameters to the first TCI and the second TCI state may comprise a mapping of the first set of DMRS ports and the second set of DMRS ports to at least one of the first TCI state or the second TCI state.
  • control information comprises a TRP switching indicator
  • mapping of the first set of DMRS ports and the second set of DMRS ports to the at least one of the first TCI state or the second TCI state is based on the TRP switching indicator.
  • the set of DMRS ports may be determined by the mapped or associated precoder. When the first and second sets of DMRS ports are mapped to the first and second precoders, the number of DMRS ports in the first and second sets may be equal to the number of layers in the first and second precoders.
  • control information comprises a single codeword (CW) associated with both the first TCI state and the second TCI state.
  • CW single codeword
  • a first layer of the CW is associated with the first TCI state and a second layer of the CW is associated with the second TCI state.
  • the control information comprises a first CW associated with the first TCI state and a second CW associated with the second TCI state.
  • the UE 515 selects or determines, based on one or more of the mappings described above, a first TCI state and associated beam parameters for communications with TRP1, and a second TCI state and associated beam parameters for communications with TRP2. In some aspects, the UE 515 may select or determine a combination of a TCI state and indicated beam parameters in the control information based on the mapping discussed above.
  • the network may select, based on the configured mappings of the TCI states and the beam parameters, the TCI codepoint to indicate in the second control information, and the UE 515 may select or determine, based on the first and second control mapping and the same mapping applied by the network, a combination of a TCI state and at least one of the one or more beam parameters for communications with each of TRP1 and TRP2.
  • the UE 515 transits a first UL signal to TRP 1 based on the selected TCI for TRP1 and the mapping described above.
  • the UE 515 transmits a second UL signal to TRP 2 based on the selected TCI for TRP2 and the mapping described above.
  • actions 510 and 512 may be performed based on a SDM communication configuration.
  • actions 510 and 512 may comprise a multi-panel transmission by the UE 515 where the same frequency and time resources are used for the simultaneous UL communications.
  • the first UL signal comprises a first PUSCH communication and the second UL signal comprises a second PUSCH communication.
  • the PUSCH communications may be scheduled by a scheduling grant indicated in the control information.
  • FIG. 6 is a block diagram of an exemplary BS 600 according to some aspects of the present disclosure.
  • the BS 600 may be a BS 105 as discussed in FIG. 1A, and or a TRP as discussed in FIGS. 2 and 5.
  • the BS 600 may be configured as one of multiple TRPs in a network configured for communication with at least one UE, such as one of the UEs 115, 215, 515, and/or 700.
  • the BS 600 may include a processor 602, a memory 604, a TCI mapping module 608, a transceiver 610 including a modem subsystem 612 and a RF unit 614, and one or more antennas 616.
  • These elements may be coupled with one another.
  • the term “coupled” may refer to directly or indirectly coupled or connected to one or more intervening elements. For instance, these elements may be in direct or indirect communication with each other, for example via one or more buses.
  • the processor 602 may have various features as a specific-type processor. For example, these may include a CPU, a DSP, an ASIC, a controller, a FPGA device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.
  • the processor 602 may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • the memory 604 may include a cache memory (e.g., a cache memory of the processor 602) , RAM, MRAM, ROM, PROM, EPROM, EEPROM, flash memory, a solid state memory device, one or more hard disk drives, memristor-based arrays, other forms of volatile and non-volatile memory, or a combination of different types of memory.
  • the memory 604 may include a non-transitory computer-readable medium.
  • the memory 604 may store instructions 606.
  • the instructions 606 may include instructions that, when executed by the processor 602, cause the processor 602 to perform operations described herein, for example, aspects of FIGS. 2 and 5. Instructions 606 may also be referred to as program code.
  • the program code may be for causing a wireless communication device to perform these operations, for example by causing one or more processors (such as processor 602) to control or command the wireless communication device to do so.
  • processors such as processor 602
  • the terms “instructions” and “code” should be interpreted broadly to include any type of computer-readable statement (s) .
  • the terms “instructions” and “code” may refer to one or more programs, routines, sub-routines, functions, procedures, etc.
  • “Instructions” and “code” may include a single computer-readable statement or many computer-readable statements.
  • the TCI mapping module 608 may be implemented via hardware, software, or combinations thereof.
  • the TCI mapping module 608 may be implemented as a processor, circuit, and/or instructions 606 stored in the memory 604 and executed by the processor 602.
  • the TCI mapping module 608 can be integrated within the modem subsystem 612.
  • the TCI mapping module 608 can be implemented by a combination of software components (e.g., executed by a DSP or a general processor) and hardware components (e.g., logic gates and circuitry) within the modem subsystem 612.
  • the TCI mapping module 608 may communicate with one or more components of BS 600 to implement various aspects of the present disclosure, for example, aspects of FIGS. 2 and 5.
  • the TCI mapping module 608 is configured to transmit control information indicating a TCI codepoint and one or more beam parameters. In some aspects, the TCI mapping module is further configured to determine or select the TCI codepoint based on a mapping of TCI states to one or more beam parameters. The TCI mapping module 608 may be further configured to receive a UL communication based on the mapping and the selected TCI states.
  • the TCI mapping module 608 may be configured to perform one or more aspects of the method 500.
  • the transceiver 610 may include the modem subsystem 612 and the RF unit 614.
  • the transceiver 610 can be configured to communicate bi-directionally with other devices, such as the UEs 115 and/or BS 600 and/or another core network element.
  • the modem subsystem 612 may be configured to modulate and/or encode data according to a MCS, e.g., a LDPC coding scheme, a turbo coding scheme, a convolutional coding scheme, a digital beamforming scheme, etc.
  • the RF unit 614 may be configured to process (e.g., perform analog to digital conversion or digital to analog conversion, etc.
  • modulated/encoded data e.g., RRC table (s) for channel access configurations, scheduling grants, channel access configuration activation, RRC configurations, PDSCH data, PDCCH DCI, etc.
  • modulated/encoded data e.g., RRC table (s) for channel access configurations, scheduling grants, channel access configuration activation, RRC configurations, PDSCH data, PDCCH DCI, etc.
  • the RF unit 614 may be further configured to perform analog beamforming in conjunction with the digital beamforming.
  • the modem subsystem 612 and/or the RF unit 614 may be separate devices that are coupled together at the BS 600 to enable the BS 600 to communicate with other devices.
  • the RF unit 614 may provide the modulated and/or processed data, e.g. data packets (or, more generally, data messages that may contain one or more data packets and other information) , to the antennas 616 for transmission to one or more other devices.
  • the antennas 616 may further receive data messages transmitted from other devices and provide the received data messages for processing and/or demodulation at the transceiver 610.
  • the transceiver 610 may provide the demodulated and decoded data (e.g., channel sensing reports, PUCCH uplink control information (UCI) , PUSCH data, etc. ) to the TCI mapping module 608 for processing.
  • the antennas 616 may include multiple antennas of similar or different designs in order to sustain multiple transmission links.
  • the BS 600 can include multiple transceivers 610 implementing different RATs (e.g., NR and LTE) .
  • the BS 600 can include a single transceiver 610 implementing multiple RATs (e.g., NR and LTE) .
  • the transceiver 610 can include various components, where different combinations of components can implement different RATs.
  • the processor 602 is coupled to the memory 604 and the transceiver 610.
  • the processor 602 is configured to communicate, with a second wireless communication device via the transceiver 610, a plurality of channel access configurations.
  • the processor 602 is further configured to communicate, with the second wireless communication device via the transceiver 610, a scheduling grant for communicating a communication signal in an unlicensed band, where the scheduling grant includes an indication of a first channel access configuration of the plurality of channel access configurations.
  • the processor 602 is further configured to communicate, with the second wireless communication device in the unlicensed band via the transceiver 610 based on the first channel access configuration, the communication signal.
  • FIG. 7 is a block diagram of an exemplary UE 700 according to some aspects of the present disclosure.
  • the UE 700 may be a UE 115 as discussed in FIG. 1A or a UE 215 as discussed in FIG. 2, or the UE 515 as discussed in FIG. 5.
  • the UE 700 may include a processor 702, a memory 704, a TCI mapping module 708, a transceiver 710 including a modem subsystem 712 and a radio frequency (RF) unit 714, and one or more antennas 716.
  • RF radio frequency
  • These elements may be coupled with one another.
  • the term “coupled” may refer to directly or indirectly coupled or connected to one or more intervening elements. For instance, these elements may be in direct or indirect communication with each other, for example via one or more buses.
  • the processor 702 may include a central processing unit (CPU) , a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a controller, a field programmable gate array (FPGA) device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.
  • the processor 702 may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • the memory 704 may include a cache memory (e.g., a cache memory of the processor 702) , random access memory (RAM) , magnetoresistive RAM (MRAM) , read-only memory (ROM) , programmable read-only memory (PROM) , erasable programmable read only memory (EPROM) , electrically erasable programmable read only memory (EEPROM) , flash memory, solid state memory device, hard disk drives, other forms of volatile and non-volatile memory, or a combination of different types of memory.
  • the memory 704 includes a non-transitory computer-readable medium.
  • the memory 704 may store, or have recorded thereon, instructions 706.
  • the instructions 706 may include instructions that, when executed by the processor 702, cause the processor 702 to perform the operations described herein with reference to a UE 115 or an anchor in connection with aspects of the present disclosure, for example, aspects of FIGS. 2 and 5. Instructions 706 may also be referred to as code, which may be interpreted broadly to include any type of computer-readable statement (s) as discussed above with respect to FIG. 9.
  • the TCI mapping module 708 may be implemented via hardware, software, or combinations thereof.
  • the TCI mapping module 708 may be implemented as a processor, circuit, and/or instructions 706 stored in the memory 704 and executed by the processor 702.
  • the TCI mapping module 708 can be integrated within the modem subsystem 712.
  • the TCI mapping module 708 can be implemented by a combination of software components (e.g., executed by a DSP or a general processor) and hardware components (e.g., logic gates and circuitry) within the modem subsystem 712.
  • the TCI mapping module 708 may communicate with one or more components of UE 700 to implement various aspects of the present disclosure, for example, aspects of FIGS. 2 and 5.
  • the TCI mapping module 708 is configured to receive control information indicating a TCI codepoint and one or more beam parameters. In some aspects, the TCI mapping module is further configured to determine or select a first TCI state for communications with a first TRP and a second TCI state for communications with a second TRP. In some aspects, the TCI mapping module 708 is configured to select the first TCI state and the second TCI state based on a mapping of the TCI states to one or more beam parameters. In some aspects, the TCI mapping module is configured to select a combination of parameters, including a TCI state, a precoder, a PC command, and/or any other suitable combination of parameters, based on the mapping. The TCI mapping module 708 may be further configured to transmit, to the first TRP and the second TRP, a UL communication based on the mapping and the selected TCI states.
  • the TCI mapping module 708 may be configured to perform one or more aspects of the method 500.
  • the transceiver 710 may include the modem subsystem 712 and the RF unit 714.
  • the transceiver 710 can be configured to communicate bi-directionally with other devices, such as the BSs 105 and 600.
  • the modem subsystem 712 may be configured to modulate and/or encode the data from the memory 704 and/or the TCI mapping module 708 according to a modulation and coding scheme (MCS) , e.g., a low-density parity check (LDPC) coding scheme, a turbo coding scheme, a convolutional coding scheme, a digital beamforming scheme, etc.
  • MCS modulation and coding scheme
  • LDPC low-density parity check
  • the RF unit 714 may be configured to process (e.g., perform analog to digital conversion or digital to analog conversion, etc.
  • modulated/encoded data e.g., channel sensing reports, PUCCH UCI, PUSCH data, etc.
  • modulated/encoded data e.g., channel sensing reports, PUCCH UCI, PUSCH data, etc.
  • the RF unit 714 may be further configured to perform analog beamforming in conjunction with the digital beamforming.
  • the modem subsystem 712 and the RF unit 714 may be separate devices that are coupled together at the UE 700 to enable the UE 700 to communicate with other devices.
  • the RF unit 714 may provide the modulated and/or processed data, e.g. data packets (or, more generally, data messages that may contain one or more data packets and other information) , to the antennas 716 for transmission to one or more other devices.
  • the antennas 716 may further receive data messages transmitted from other devices.
  • the antennas 716 may provide the received data messages for processing and/or demodulation at the transceiver 710.
  • the transceiver 710 may provide the demodulated and decoded data (e.g., RRC table (s) for channel access configurations, scheduling grants, channel access configuration activation, timing advance configurations, RRC configurations, PUSCH configurations, SRS resource configurations, PUCCH configurations, BWP configurations, PDSCH data, PDCCH DCI, etc. ) to the TCI mapping module 708 for processing.
  • the antennas 716 may include multiple antennas of similar or different designs in order to sustain multiple transmission links.
  • the UE 700 can include multiple transceivers 710 implementing different RATs (e.g., NR and LTE) .
  • the UE 700 can include a single transceiver 710 implementing multiple RATs (e.g., NR and LTE) .
  • the transceiver 710 can include various components, where different combinations of components can implement different RATs.
  • the processor 702 is coupled to the memory 704 and the transceiver 710.
  • the processor 702 is configured to communicate, with a second wireless communication device via the transceiver 710, one or more timing advance configurations and/or one or more cell configurations.
  • the processor 702 may be further configured to select one or more reference cells for communication in a mTRP communication scenario, and to determine one or more reference timings and/or one or more timing advances based on the one or more reference cells.
  • FIG. 8 is a flow diagram illustrating a wireless communication method 800 according to some aspects of the present disclosure. Aspects of the method 800 can be executed by a computing device (e.g., a processor, processing circuit, and/or other suitable component) of a wireless communication device or other suitable means for performing the blocks.
  • a network entity such as one of the BSs 105 and/or 600, may utilize one or more components, such as the processor 602, the memory 604, the TCI mapping module 608, the transceiver 610, the modem 612, the RF unit 614, and the one or more antennas 616, to execute the blocks of method 800.
  • the method 800 may employ similar mechanisms as described in FIG. 5.
  • the network entity may include an aggregated BS and/or a disaggregated BS as described above with respect to FIGS. 1A and 1B.
  • the network entity may be configured as one of a plurality of transmission-reception points (TRPs) in a mTRP communication scenario.
  • TRPs transmission-reception points
  • aspects of the method 800 may be described with reference to one or more TRPs and one or more UEs.
  • the method 800 may employ similar mechanisms as described in FIG. 5. As illustrated, the method 800 includes a number of enumerated blocks, but aspects of the method 800 may include additional blocks before, after, and in between the enumerated blocks. In some aspects, one or more of the enumerated blocks may be omitted or performed in a different order.
  • the network entity transmits, to a UE, control information associated with an uplink (UL) communication.
  • the control information may include one or more beam parameters.
  • the control information further includes a transmission configuration indicator (TCI) codepoint indication.
  • TCI codepoint indication may indicate a first TCI state and a second TCI state.
  • the TCI codepoint indication in the control information is based on a mapping of the one or more beam parameters to the first TCI state and the second TCI state.
  • control information may include downlink control information (DCI) .
  • the DCI may include a plurality of fields, each field indicating one or more parameters.
  • the DCI includes a TCI codepoint field indicating the TCI codepoint value.
  • the TCI codepoint value may be activated by a media access control control element (MAC-CE) and/or by DCI.
  • the network may configure the UE with a TCI state list, and the network may activate a subset of the TCI state list based on the activation in the DCI/MAC-CE.
  • the control information comprises a DCI format 0_1 or other DCI format indicating the TCI codepoint based on the configured TCI state list and/or the TCI codepoint.
  • the TCI states indicated in the TCI codepoint may include one or more unified TCI states.
  • the unified TCI state (s) may include type 3 unified TCI states for two or more UL channels and/or UL reference signals.
  • the unified TCI state (s) may include type 1 and/or type 2 unified TCI states.
  • the control information may comprise one or more DCI messages including one or more fields or parameters described with respect to the DCI 300 of FIG. 3.
  • the one or more beam parameters indicated in the control information may include one or more power control (PC) commands, one or more DMRS antenna port indications, one or more precoders, and/or a TRP switching indicator.
  • the DMRS antenna port indications may include, or be associated with, one or more ranks.
  • each of the precoders may be associated with a rank.
  • block 810 may include transmitting more than one DCI, MAC-CE, RRC IE, and/or a combination thereof.
  • block 810 may include transmitting a first DCI and/or a RRC configuration including a DMRS antenna port indication, one or more precoders, and/or one or more PC commands.
  • Block 810 may further include transmitting a second DCI selecting the TCI codepoint indicating the first TCI state and the second TCI state.
  • block 810 may include transmitting, in addition to the first DCI mentioned above, a MAC-CE activating the TCI codepoint.
  • the MAC-CE may activate a single TCI codepoint.
  • one DCI may indicate the TCI codepoint as well as the one or more beam parameters described above (e.g., precoder (s) , PC command (s) , DMRS antenna port indicator, etc. )
  • a DCI format 0_1 may indicate both the TCI codepoint as the one or more beam parameters.
  • the network and/or the network entity may select the TCI codepoint based on the mapping.
  • the mapping may correspond to a hardcoded rule or other configuration at the network and/or network entity.
  • the mapping may be used to select the TCI codepoint such that the first TCI state of the TCI codepoint is mapped to a first precoder, and the second TCI state of the TCI codepoint is mapped to a second precoder.
  • the mapping may indicate or cause the network entity to select the TCI codepoint based on a TRP switching indicator, one or more PC command fields, and/or one or more DMRS antenna port indications of the one or more beam parameters.
  • the one or more beam parameters comprises a first precoder and a second precoder.
  • the TCI codepoint indicated in the control information is based on a mapping of the first precoder to the first TCI state, and the second precoder to the second TCI state.
  • the one or more beam parameters comprise a first precoder and a second precoder, and the control information further comprises a TRP switching indicator.
  • the mapping of the one or more beam parameters to the first TCI state and the second TCI state is based on the TRP switching indicator.
  • the mapping may indicate that the first precoder is associated with the first TCI state, and the second precoder is associated with the second TCI state.
  • the mapping may indicate that the first precoder is associated with the second TCI state and the second precoder is associated with the first TCI state.
  • the one or more beam parameters may include or indicate a single power control (PC) command.
  • the mapping of the one or more beam parameters to the first TCI state and the second TCI state may comprise a mapping of the single PC command to each of the first TCI state and the second TCI state.
  • the control information may comprise DCI including a single PC command field.
  • the value of the single PC command field may be mapped to both TCI states of the TCI codepoint.
  • the one or more beam parameters may include a first PC command and a second PC command.
  • the first TCI state may be associated with a closed loop index of 0 and the second TCI may be associated with a closed loop index of 1.
  • the mapping of the one or more beam parameters to the first TCI and the second TCI may include a mapping of the first PC command to the first TCI and the second PC command to the second TCI state.
  • the one or more beam parameters include a first precoder and a second precoder.
  • the one or more beam parameters may further include a DMRS antenna port indication.
  • the first precoder may be associated with a first rank
  • the second precoder may be associated with a second rank.
  • the DMRS antenna port indication is associated with a third rank.
  • the third rank may be based on a sum of the first rank and the second rank.
  • the one or more beam parameters include a first precoder, a second precoder, and a DMRS antenna port indication.
  • the DMRS antenna port indication indicates a first DMRS code division multiplexing (CDM) group and a second DMRS CDM group.
  • the mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the first DMRS CDM group to the first precoder and the second DMRS CDM group to the second precoder.
  • the mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the first DMRS CDM group and the second DMRS CDM group to at least one of the first TCI state or the second TCI state.
  • the control information may further comprise or indicate a TRP switching indicator.
  • the mapping of the first DMRS CDM group and the second DMRS CDM group to the at least one of the first TCI state or the second TCI state is based on the TRP switching indicator.
  • the one or more beam parameters comprise a first precoder, a second precoder, and a DMRS antenna port indication.
  • the DMRS antenna port indication may indicate a first set of DMRS ports and a second set of DMRS ports.
  • the mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the first set of DMRS ports to the first precoder and the second set of DMRS ports to the second precoder.
  • the mapping of the one or more beam parameters to the first TCI and the second TCI state may comprise a mapping of the first set of DMRS ports and the second set of DMRS ports to at least one of the first TCI state or the second TCI state.
  • the control information comprises a TRP switching indicator, and the mapping of the first set of DMRS ports and the second set of DMRS ports to the at least one of the first TCI state or the second TCI state is based on the TRP switching indicator.
  • control information comprises a single codeword (CW) associated with both the first TCI state and the second TCI state.
  • CW single codeword
  • a first layer of the CW is associated with the first TCI state and a second layer of the CW is associated with the second TCI state.
  • the control information comprises a first CW associated with the first TCI state and a second CW associated with the second TCI state.
  • the network entity receives, from the UE, the UL communication, wherein the UL communication is based on at least one of the first TCI state or the second TCI state, and the mapping of the one or more beam parameters to the first TCI and the second TCI STATE.
  • the network entity may include a TRP in a mTRP communication scenario.
  • the control information communicated at block 810 may indicate the TCI states for each of two TRPs, for example.
  • the UE may be configured to identify or determine a mapping of the indicated TCI states of the control information with the one or more beam parameters for simultaneous SDM-based UL communications with a first TRP and a second TRP. Accordingly, UL communication received at block 820 may be communicated using the combination of TCI state and beam parameters as selected by the network based on the mapping described above.
  • the method 800 may include one or more steps, actions, or other aspects illustrated in FIG. 5 and described above.
  • FIG. 9 is a flow diagram illustrating a wireless communication method 900 according to some aspects of the present disclosure. Aspects of the method 900 can be executed by a computing device (e.g., a processor, processing circuit, and/or other suitable component) of a wireless communication device or other suitable means for performing the blocks.
  • a computing device e.g., a processor, processing circuit, and/or other suitable component
  • a UE such as one of the UEs 115, 215, 515, and/or 700, may utilize one or more components, such as the processor 702, the memory 704, the TCI mapping module 708, the transceiver 710, the modem 712, the RF unit 714, and the one or more antennas 716, to execute the blocks of method 900.
  • the method 900 may employ similar mechanisms as described in FIG. 5.
  • the UE may be configured to communication with a plurality of transmission-reception points (TRPs) in a mTRP communication scenario. Accordingly, aspects of the method 900 may be described with reference to one or more TRPs and one or more UEs.
  • the method 900 may employ similar mechanisms as described in FIG. 5. As illustrated, the method 900 includes a number of enumerated blocks, but aspects of the method 900 may include additional blocks before, after, and in between the enumerated blocks. In some aspects, one or more of the enumerated blocks may be omitted or performed in a different order.
  • the UE receives, from a network entity, control information associated with an uplink (UL) communication.
  • the network entity may include a BS.
  • the BS may operate as one of a plurality of TRPs.
  • the control information may include one or more beam parameters.
  • the control information further includes a transmission configuration indicator (TCI) codepoint indication.
  • TCI codepoint indication may indicate a first TCI state and a second TCI state.
  • the TCI codepoint indication in the control information is based on a mapping of the one or more beam parameters to the first TCI state and the second TCI state.
  • control information may include downlink control information (DCI) .
  • DCI downlink control information
  • the DCI may include a plurality of fields, each field indicating one or more parameters.
  • the DCI includes a TCI codepoint field indicating the TCI codepoint value.
  • the TCI codepoint value may be activated by a media access control control element (MAC-CE) and/or by DCI.
  • MAC-CE media access control control element
  • the network may configure the UE with a TCI state list, and the network may activate a subset of the TCI state list based on the activation in the DCI/MAC-CE.
  • the control information comprises a DCI format 0_1 or other DCI format indicating the TCI codepoint based on the configured TCI state list and/or the TCI codepoint.
  • the TCI states indicated in the TCI codepoint may include one or more unified TCI states.
  • the unified TCI state (s) may include type 3 unified TCI states for two or more UL channels and/or UL reference signals.
  • the unified TCI state (s) may include type 1 and/or type 2 unified TCI states.
  • control information may comprise one or more DCI messages including one or more fields or parameters described with respect to the DCI 300 of FIG. 3.
  • the one or more beam parameters indicated in the control information may include one or more power control (PC) commands, one or more DMRS antenna port indications, one or more precoders, and/or a TRP switching indicator.
  • the DMRS antenna port indications may include, or be associated with, one or more ranks.
  • each of the precoders may be associated with a rank.
  • block 910 may include receiving more than one DCI, MAC-CE, RRC IE, and/or a combination thereof.
  • block 910 may include receiving a first DCI and/or a RRC configuration including a DMRS antenna port indication, one or more precoders, and/or one or more PC commands.
  • Block 910 may further include receiving a second DCI selecting the TCI codepoint indicating the first TCI state and the second TCI state.
  • block 910 may include receiving, in addition to the first DCI mentioned above, a MAC-CE activating the TCI codepoint.
  • the MAC-CE may activate a single TCI codepoint.
  • one DCI may indicate the TCI codepoint as well as the one or more beam parameters described above (e.g., precoder (s) , PC command (s) , DMRS antenna port indicator, etc. )
  • a DCI format 0_1 may indicate both the TCI codepoint as the one or more beam parameters.
  • the method 900 may include the UE determining or selecting TCI states for the UL communication from the indicated TCI codepoint based a configured mapping.
  • the mapping may correspond to a hardcoded rule or other configuration.
  • the mapping may be used to determine a combination of TCI states and precoders such that the first TCI state of the TCI codepoint is mapped to a first precoder, and the second TCI state of the TCI codepoint is mapped to a second precoder.
  • the mapping may indicate or cause the UE to select the TCI codepoint based on a TRP switching indicator, one or more PC command fields, and/or one or more DMRS antenna port indications of the one or more beam parameters.
  • the one or more beam parameters comprises a first precoder and a second precoder.
  • the TCI codepoint indicated in the control information is based on a mapping of the first precoder to the first TCI STATE, and the second precoder to the second TCI STATE.
  • the one or more beam parameters comprise a first precoder and a second precoder, and the control information further comprises a TRP switching indicator.
  • the mapping of the one or more beam parameters to the first TCI state and the second TCI state is based on the TRP switching indicator.
  • the mapping may indicate that the first precoder is associated with the first TCI state, and the second precoder is associated with the second TCI state.
  • the mapping may indicate that the first precoder is associated with the second TCI state and the second precoder is associated with the first TCI state.
  • the one or more beam parameters may include or indicate a single power control (PC) command.
  • the mapping of the one or more beam parameters to the first TCI state and the second TCI state may comprise a mapping of the single PC command to each of the first TCI state and the second TCI state.
  • the control information may comprise DCI including a single PC command field.
  • the value of the single PC command field may be mapped to both TCI states of the TCI codepoint.
  • the one or more beam parameters may include a first PC command and a second PC command.
  • the first TCI state may be associated with a closed loop index of 0 and the second TCI may be associated with a closed loop index of 1.
  • the mapping of the one or more beam parameters to the first TCI and the second TCI may include a mapping of the first PC command to the first TCI and the second PC command to the second TCI state.
  • the one or more beam parameters include a first precoder and a second precoder.
  • the one or more beam parameters may further include a DMRS antenna port indication.
  • the first precoder may be associated with a first rank
  • the second precoder may be associated with a second rank.
  • the DMRS antenna port indication is associated with a third rank.
  • the third rank may be based on a sum of the first rank and the second rank.
  • the one or more beam parameters include a first precoder, a second precoder, and a DMRS antenna port indication.
  • the DMRS antenna port indication indicates a first DMRS code division multiplexing (CDM) group and a second DMRS CDM group.
  • the mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the first DMRS CDM group to the first precoder and the second DMRS CDM group to the second precoder.
  • the mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the first DMRS CDM group and the second DMRS CDM group to at least one of the first TCI state or the second TCI state.
  • the control information may further comprise or indicate a TRP switching indicator.
  • the mapping of the first DMRS CDM group and the second DMRS CDM group to the at least one of the first TCI state or the second TCI state is based on the TRP switching indicator.
  • the one or more beam parameters comprise a first precoder, a second precoder, and a DMRS antenna port indication.
  • the DMRS antenna port indication may indicate a first set of DMRS ports and a second set of DMRS ports.
  • the mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the first set of DMRS ports to the first precoder and the second set of DMRS ports to the second precoder.
  • the mapping of the one or more beam parameters to the first TCI and the second TCI state may comprise a mapping of the first set of DMRS ports and the second set of DMRS ports to at least one of the first TCI state or the second TCI state.
  • the control information comprises a TRP switching indicator, and the mapping of the first set of DMRS ports and the second set of DMRS ports to the at least one of the first TCI state or the second TCI state is based on the TRP switching indicator.
  • control information comprises a single codeword (CW) associated with both the first TCI state and the second TCI state.
  • CW single codeword
  • a first layer of the CW is associated with the first TCI state and a second layer of the CW is associated with the second TCI state.
  • the control information comprises a first CW associated with the first TCI state and a second CW associated with the second TCI state.
  • the UE transmits, to the first TRP and the second TRP, the UL communication, wherein the UL communication is based on: the first TCI state; the second TCI state; and the mapping of the one or more beam parameters to the first TCI state and the second TCI state.
  • the network entity may include a TRP in a mTRP communication scenario.
  • the control information communicated at block 910 may indicate the TCI states for each of two TRPs, for example.
  • the UE may be configured to identify or determine a mapping of the indicated TCI states of the control information with the one or more beam parameters for simultaneous SDM-based UL communications with a first TRP and a second TRP. Accordingly, UL communication received at block 920 may be communicated using the combination of TCI state and beam parameters as selected by the network based on the mapping described above.
  • the method 900 may include one or more steps, actions, or other aspects illustrated in FIG. 5 and described above.
  • a method of wireless communication performed at a network entity comprising: transmitting, to a user equipment (UE) , control information associated with an uplink (UL) communication, wherein the control information comprises: one or more beam parameters; and a transmission configuration indicator (TCI) codepoint indication indicating a first TCI state and a second TCI state, wherein the TCI codepoint indication is based on a mapping of the one or more beam parameters to the first TCI state and the second TCI state; and receiving, from the UE, the UL communication, wherein the UL communication is based on: at least one of the first TCI state or the second TCI state; and the mapping of the one or more beam parameters to the first TCI state and the second TCI state.
  • TCI transmission configuration indicator
  • Aspect 2 The method of aspect 1, wherein the one or more beam parameters comprise a first precoder and a second precoder, and wherein the TCI codepoint indication is based on a mapping of: the first precoder to the first TCI state; and the second precoder to the second TCI state.
  • Aspect 3 The method of any of aspects 1-2, wherein the one or more beam parameters comprise a first precoder and a second precoder, and wherein the control information comprises a transmission reception point (TRP) switching indicator, and wherein the mapping of the one or more beam parameters to the first TCI state and the second TCI state is based on the TRP switching indicator.
  • TRP transmission reception point
  • Aspect 4 The method of any of aspects 1-3, wherein the one or more beam parameters comprises a single power control (PC) command, and wherein mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the single PC command to each of the first TCI state and the second TCI state.
  • PC power control
  • Aspect 5 The method of any of aspects 1-3, wherein: the one or more beam parameters comprises a first power control (PC) command field and a second PC command field; and the mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the first PC command field to the first TCI state and the second PC command field to the second TCI state.
  • PC power control
  • the one or more beam parameters comprise a first precoder, a second precoder, and a demodulation reference signal (DMRS) antenna port indication;
  • the first precoder indicates a first rank
  • the second precoder indicates a second rank
  • the DMRS antenna port indication indicates a third rank; and the third rank is based on a sum of the first rank and the second rank.
  • DMRS demodulation reference signal
  • Aspect 7 The method of any of aspects 1-6, wherein: the one or more beam parameters comprise a first precoder, a second precoder, and a demodulation reference signal (DMRS) antenna port indication; and the DMRS antenna port indication indicates a first DMRS code division multiplexing (CDM) group and a second DMRS CDM group.
  • the one or more beam parameters comprise a first precoder, a second precoder, and a demodulation reference signal (DMRS) antenna port indication
  • DMRS antenna port indication indicates a first DMRS code division multiplexing (CDM) group and a second DMRS CDM group.
  • CDM DMRS code division multiplexing
  • mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the first DMRS CDM group to the first precoder and the second DMRS CDM group to the second precoder.
  • mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the first DMRS CDM group and the second DMRS CDM group to at least one of the first TCI state or the second TCI; and the control information comprises a TRP switching indicator; and the mapping of the first DMRS CDM group and the second DMRS CDM group to at least one of the first TCI state or the second TCI state is based on the TRP switching indicator.
  • Aspect 10 The method of any of aspects 1-9, wherein: the one or more beam parameters comprise a first precoder, a second precoder, and a demodulation reference signal (DMRS) antenna port indication; and the DMRS antenna port indication indicates a first set of DMRS ports and a second set of DMRS ports.
  • the one or more beam parameters comprise a first precoder, a second precoder, and a demodulation reference signal (DMRS) antenna port indication
  • DMRS antenna port indication indicates a first set of DMRS ports and a second set of DMRS ports.
  • mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the first set of DMRS ports to the first precoder and the second set of DMRS ports to the second precoder.
  • mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the first set of DMRS ports and the second set of DMRS ports to at least one of the first TCI state or the second TCI; and the control information comprises a TRP switching indicator; and the mapping of the first set of DMRS ports and the second set of DMRS ports to at least one of the first TCI state or the second TCI state is based on the TRP switching indicator.
  • control information comprises a single codeword associated with both the first TCI state and the second TCI state, wherein a first layer of the codeword is associated with the first TCI state and a second layer of the codeword is associated with the second TCI state.
  • control information comprises a first codeword associated with the first TCI state and a second codeword associated with the second TCI state.
  • Aspect 15 The method of aspect 1, wherein the control information is indicated in: one or more downlink control information (DCI) messages; one or more radio resource control (RRC) messages; one or more media access control control elements (MAC-CEs) ; or a combination thereof.
  • DCI downlink control information
  • RRC radio resource control
  • MAC-CEs media access control control elements
  • a method of wireless communication performed at a user equipment (UE) comprising: receiving control information associated with an uplink (UL) communication, wherein the control information comprises: one or more beam parameters; and a transmission configuration indicator (TCI) codepoint indication indicating a first TCI state and a second TCI state, wherein the TCI codepoint indication is based on a mapping of the one or more beam parameters to the first TCI state and the second TCI; and transmitting the UL communication based on: the first TCI; the second TCI; and the mapping of the one or more beam parameters to the first TCI state and the second TCI state.
  • UL uplink
  • TCI transmission configuration indicator
  • Aspect 17 The method of aspect 16, wherein the one or more beam parameters comprise a first precoder and a second precoder, and wherein the TCI codepoint indication is based on a mapping of: the first precoder to the first TCI state; and the second precoder to the second TCI state.
  • Aspect 18 The method of any of aspects 16-17, wherein the one or more beam parameters comprise a first precoder and a second precoder, and wherein the control information comprises a transmission reception point (TRP) switching indicator, and wherein the mapping of the one or more beam parameters to the first TCI state and the second TCI state is based on the TRP switching indicator.
  • TRP transmission reception point
  • Aspect 19 The method of any of aspects 16-18, wherein the one or more beam parameters comprises a single power control (PC) command, and wherein mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the single PC command to each of the first TCI state and the second TCI state.
  • PC power control
  • Aspect 20 The method of any of aspects 16-18, wherein: the one or more beam parameters comprises a first power control (PC) command field and a second PC command field; and the mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the first PC command field to the first TCI state and the second PC command field to the second TCI state.
  • PC power control
  • the one or more beam parameters comprise a first precoder, a second precoder, and a demodulation reference signal (DMRS) antenna port indication;
  • the first precoder indicates a first rank
  • the second precoder indicates a second rank
  • the DMRS antenna port indication indicates a third rank; and the third rank is based on a sum of the first rank and the second rank.
  • DMRS demodulation reference signal
  • the one or more beam parameters comprise a first precoder, a second precoder, and a demodulation reference signal (DMRS) antenna port indication; and the DMRS antenna port indication indicates a first DMRS code division multiplexing (CDM) group and a second DMRS CDM group.
  • DMRS demodulation reference signal
  • mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the first DMRS CDM group to the first precoder and the second DMRS CDM group to the second precoder.
  • mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the first DMRS CDM group and the second DMRS CDM group to at least one of the first TCI state or the second TCI; and the control information comprises a TRP switching indicator; and the mapping of the first DMRS CDM group and the second DMRS CDM group to at least one of the first TCI state or the second TCI state is based on the TRP switching indicator.
  • Aspect 25 The method of any of aspects 16-24, wherein: the one or more beam parameters comprise a first precoder, a second precoder, and a demodulation reference signal (DMRS) antenna port indication; and the DMRS antenna port indication indicates a first set of DMRS ports and a second set of DMRS ports.
  • the one or more beam parameters comprise a first precoder, a second precoder, and a demodulation reference signal (DMRS) antenna port indication
  • DMRS antenna port indication indicates a first set of DMRS ports and a second set of DMRS ports.
  • mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the first set of DMRS ports to the first precoder and the second set of DMRS ports to the second precoder.
  • mapping of the one or more beam parameters to the first TCI state and the second TCI state comprises a mapping of the first set of DMRS ports and the second set of DMRS ports to at least one of the first TCI state or the second TCI; and the control information comprises a TRP switching indicator; and the mapping of the first set of DMRS ports and the second set of DMRS ports to at least one of the first TCI state or the second TCI state is based on the TRP switching indicator.
  • Aspect 28 The method of any of aspects 16-27, wherein the control information is indicated in:one or more downlink control information (DCI) messages; one or more radio resource control (RRC) messages; one or more media access control control elements (MAC-CEs) ; or a combination thereof.
  • DCI downlink control information
  • RRC radio resource control
  • MAC-CEs media access control control elements
  • a network entity comprising: a memory device; a transceiver; and a processor in communication with the memory device and the transceiver, wherein the network entity is configured to perform the actions of any of aspects 1-15.
  • a user equipment comprising: a memory device; a transceiver; and a processor in communication with the memory device and the transceiver, wherein the network entity is configured to perform the actions of any of aspects 16-28.
  • Aspect 31 A non-transitory, computer-readable medium having program code recorded thereon, wherein the program code comprises instructions executable by a processor of a network entity to cause the network entity to perform the actions of any of aspects 1-15.
  • Aspect 32 A non-transitory, computer-readable medium having program code recorded thereon, wherein the program code comprises instructions executable by a processor of a user equipment (UE) to cause the UE to perform the actions of any of aspects 16-28.
  • UE user equipment
  • Aspect 33 A network entity comprising means for performing the actions of any of aspects 1-15.
  • Aspect 34 A user equipment (UE) comprising means for performing the actions of any of aspects 16-28.
  • Information and signals may be represented using any of a variety of different technologies and techniques.
  • data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) .
  • the functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
  • “or” as used in a list of items indicates an inclusive list such that, for example, a list of [at least one of A, B, or C] means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) .

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  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de communication sans fil mis en œuvre au niveau d'une entité de réseau comprenant les étapes suivantes : transmission, à un équipement utilisateur (UE), d'informations de commande associées à une communication de liaison montante (UL), les informations de commande comprenant : un ou plusieurs paramètres de faisceau ; et une indication de point de code TCI indiquant un premier état TCI et un second état TCI, l'indication de point de code TCI étant basée sur un mappage du ou des paramètres de faisceau au premier état TCI et au second état TCI ; et réception, en provenance de l'UE, de la communication UL, la communication UL étant basée sur : le premier état TCI et/ou le second état TCI ; et le mappage du ou des paramètres de faisceau au premier état TCI et au second état TCI.
PCT/CN2022/105643 2022-07-14 2022-07-14 Indicateurs de configuration de transmission pour communications à multiples points de transmission-réception WO2024011485A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021164691A1 (fr) * 2020-02-17 2021-08-26 Qualcomm Incorporated Association d'indicateurs de configuration de transmission et de précodeurs dans des transmissions en liaison montante
CN114467351A (zh) * 2019-10-04 2022-05-10 高通股份有限公司 用于多发送-接收点部署中的通信的波束选择
US20220217695A1 (en) * 2021-01-04 2022-07-07 FG Innovation Company Limited Method for configuring tci states for ue and ue using the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114467351A (zh) * 2019-10-04 2022-05-10 高通股份有限公司 用于多发送-接收点部署中的通信的波束选择
WO2021164691A1 (fr) * 2020-02-17 2021-08-26 Qualcomm Incorporated Association d'indicateurs de configuration de transmission et de précodeurs dans des transmissions en liaison montante
US20220217695A1 (en) * 2021-01-04 2022-07-07 FG Innovation Company Limited Method for configuring tci states for ue and ue using the same

Non-Patent Citations (1)

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INTEL CORPORATION: "Correction to multi TRP operation", 3GPP TSG RAN WG1 MEETING #100-E, R1-2000739, 15 February 2020 (2020-02-15), XP051853432 *

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