WO2021155719A1 - Capacité d'équipement utilisateur sur rapport lié à une sélection de faisceau de liaison montante - Google Patents

Capacité d'équipement utilisateur sur rapport lié à une sélection de faisceau de liaison montante Download PDF

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Publication number
WO2021155719A1
WO2021155719A1 PCT/CN2020/138958 CN2020138958W WO2021155719A1 WO 2021155719 A1 WO2021155719 A1 WO 2021155719A1 CN 2020138958 W CN2020138958 W CN 2020138958W WO 2021155719 A1 WO2021155719 A1 WO 2021155719A1
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WIPO (PCT)
Prior art keywords
uplink
report
capability
beam report
selection
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PCT/CN2020/138958
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English (en)
Inventor
Fang Yuan
Yan Zhou
Tao Luo
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Qualcomm Incorporated
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Publication of WO2021155719A1 publication Critical patent/WO2021155719A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • 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
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0628—Diversity capabilities
    • 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
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/088—Hybrid systems, i.e. switching and combining using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data

Definitions

  • the present disclosure relates generally to communication systems, and more particularly, to a wireless communication involving directional beams.
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • TD-SCDMA time division synchronous code division multiple access
  • 5G New Radio is part of a continuous mobile broadband evolution promulgated by Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with Internet of Things (IoT) ) , and other requirements.
  • 3GPP Third Generation Partnership Project
  • 5G NR includes services associated with enhanced mobile broadband (eMBB) , massive machine type communications (mMTC) , and ultra-reliable low latency communications (URLLC) .
  • eMBB enhanced mobile broadband
  • mMTC massive machine type communications
  • URLLC ultra-reliable low latency communications
  • Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard.
  • LTE Long Term Evolution
  • a method, a computer-readable medium, and an apparatus are provided for wireless communication at a user equipment (UE) .
  • the apparatus transmits, to a base station, an indication of a UE capability to provide a beam report for at least one of uplink beam selection, downlink beam selection, or beam failure.
  • the apparatus receives a configuration from the base station to provide the beam report based on the UE capability.
  • the apparatus transmits the beam report to the base station based on the configuration and the UE capability to provide the beam report.
  • a method, a computer-readable medium, and an apparatus are provided for wireless communication at a base station.
  • the apparatus receives, from a UE, an indication of a UE capability to provide a beam report for at least one of uplink beam selection, downlink beam selection, or beam failure.
  • the apparatus configures the UE to provide the beam report based on the UE capability.
  • the apparatus receives the beam report from the UE based on the configuration and the UE capability to provide the beam report.
  • the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims.
  • the following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed, and this description is intended to include all such aspects and their equivalents.
  • FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network.
  • FIGs. 2A, 2B, 2C, and 2D are diagrams illustrating examples of a first 5G/NR frame, DL channels within a 5G/NR subframe, a second 5G/NR frame, and UL channels within a 5G/NR subframe, respectively.
  • FIG. 3 is a diagram illustrating an example of a base station and user equipment (UE) in an access network.
  • UE user equipment
  • FIG. 4 is an example communication flow between a UE and a base station.
  • FIG. 5 is an example communication flow between a UE and a base station.
  • FIG. 6 is a flowchart of a method of wireless communication.
  • FIG. 7 is a diagram illustrating an example of a hardware implementation for an example apparatus.
  • FIG. 8 is a flowchart of a method of wireless communication.
  • FIG. 9 is a diagram illustrating an example of a hardware implementation for an example apparatus.
  • processors include microprocessors, microcontrollers, graphics processing units (GPUs) , central processing units (CPUs) , application processors, digital signal processors (DSPs) , reduced instruction set computing (RISC) processors, systems on a chip (SoC) , baseband processors, field programmable gate arrays (FPGAs) , programmable logic devices (PLDs) , state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure.
  • processors in the processing system may execute software.
  • Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, the functions may be stored on or encoded as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes computer storage media. Storage media may be any available media that can be accessed by a computer.
  • such computer-readable media can comprise a random-access memory (RAM) , a read-only memory (ROM) , an electrically erasable programmable ROM (EEPROM) , optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the aforementioned types of computer-readable media, or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.
  • RAM random-access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable ROM
  • optical disk storage magnetic disk storage
  • magnetic disk storage other magnetic storage devices
  • combinations of the aforementioned types of computer-readable media or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.
  • FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network 100.
  • the wireless communications system (also referred to as a wireless wide area network (WWAN) ) includes base stations 102, UEs 104, an Evolved Packet Core (EPC) 160, and another core network 190 (e.g., a 5G Core (5GC) ) .
  • the base stations 102 may include macrocells (high power cellular base station) and/or small cells (low power cellular base station) .
  • the macrocells include base stations.
  • the small cells include femtocells, picocells, and microcells.
  • the base stations 102 configured for 4G LTE may interface with the EPC 160 through first backhaul links 132 (e.g., S1 interface) .
  • the base stations 102 configured for 5G NR may interface with core network 190 through second backhaul links 184.
  • the base stations 102 may perform one or more of the following functions: transfer of user data, radio channel ciphering and deciphering, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity) , inter-cell interference coordination, connection setup and release, load balancing, distribution for non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS) , subscriber and equipment trace, RAN information management (RIM) , paging, positioning, and delivery of warning messages.
  • NAS non-access stratum
  • RAN radio access network
  • MBMS multimedia broadcast multicast service
  • RIM RAN information management
  • the base stations 102 may communicate directly or indirectly (e.g., through the EPC 160 or core network 190) with each other over third backhaul links 134 (e.g., X2 interface) .
  • the third backhaul links 134 may be wired or wireless.
  • the base stations 102 may wirelessly communicate with the UEs 104. Each of the base stations 102 may provide communication coverage for a respective geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, the small cell 102' may have a coverage area 110' that overlaps the coverage area 110 of one or more macro base stations 102.
  • a network that includes both small cell and macrocells may be known as a heterogeneous network.
  • a heterogeneous network may also include Home Evolved Node Bs (eNBs) (HeNBs) , which may provide service to a restricted group known as a closed subscriber group (CSG) .
  • eNBs Home Evolved Node Bs
  • HeNBs Home Evolved Node Bs
  • CSG closed subscriber group
  • the communication links 120 between the base stations 102 and the UEs 104 may include uplink (UL) (also referred to as reverse link) transmissions from a UE 104 to a base station 102 and/or downlink (DL) (also referred to as forward link) transmissions from a base station 102 to a UE 104.
  • the communication links 120 may use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and/or transmit diversity.
  • the communication links may be through one or more carriers.
  • the base stations 102/UEs 104 may use spectrum up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc.
  • the component carriers may include a primary component carrier and one or more secondary component carriers.
  • a primary component carrier may be referred to as a primary cell (PCell) and a secondary component carrier may be referred to as a secondary cell (SCell) .
  • D2D communication link 158 may use the DL/UL WWAN spectrum.
  • the D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , and a physical sidelink control channel (PSCCH) .
  • sidelink channels such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , and a physical sidelink control channel (PSCCH) .
  • sidelink channels such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , and a physical sidelink control channel (PSCCH) .
  • D2D communication may be through a variety of wireless D2D communications systems, such as for example, WiMedia, Bluetooth, ZigBe
  • the wireless communications system may further include a Wi-Fi access point (AP) 150 in communication with Wi-Fi stations (STAs) 152 via communication links 154 in a 5 GHz unlicensed frequency spectrum.
  • AP Wi-Fi access point
  • STAs Wi-Fi stations
  • communication links 154 in a 5 GHz unlicensed frequency spectrum.
  • the STAs 152/AP 150 may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available.
  • CCA clear channel assessment
  • the small cell 102' may operate in a licensed and/or an unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cell 102' may employ NR and use the same 5 GHz unlicensed frequency spectrum as used by the Wi-Fi AP 150. The small cell 102', employing NR in an unlicensed frequency spectrum, may boost coverage to and/or increase capacity of the access network.
  • a base station 102 may include and/or be referred to as an eNB, gNodeB (gNB) , or another type of base station.
  • Some base stations, such as gNB 180 may operate in a traditional sub 6 GHz spectrum, in millimeter wave (mmW) frequencies, and/or near mmW frequencies in communication with the UE 104.
  • mmW millimeter wave
  • mmW base station Extremely high frequency (EHF) is part of the RF in the electromagnetic spectrum.
  • EHF Extremely high frequency
  • EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 millimeter and 10 millimeters. Radio waves in the band may be referred to as a millimeter wave. Near mmW may extend down to a frequency of 3 GHz with a wavelength of 100 millimeters.
  • the super high frequency (SHF) band extends between 3 GHz and 30 GHz, also referred to as centimeter wave. Communications using the mmW/near mmW radio frequency (RF) band (e.g., 3 GHz –300 GHz) has extremely high path loss and a short range.
  • the mmW base station 180 may utilize beamforming 182 with the UE 104 to compensate for the extremely high path loss and short range.
  • the base station 180 and the UE 104 may each include a plurality of antennas, such as antenna elements, antenna panels, and/or antenna arrays to facilitate the beamforming.
  • the base station 180 may transmit a beamformed signal to the UE 104 in one or more transmit directions 182'.
  • the UE 104 may receive the beamformed signal from the base station 180 in one or more receive directions 182”.
  • the UE 104 may also transmit a beamformed signal to the base station 180 in one or more transmit directions.
  • the base station 180 may receive the beamformed signal from the UE 104 in one or more receive directions.
  • the base station 180/UE 104 may perform beam training to determine the best receive and transmit directions for each of the base station 180/UE 104.
  • the transmit and receive directions for the base station 180 may or may not be the same.
  • the transmit and receive directions for the UE 104 may or may not be the same.
  • the EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172.
  • MME Mobility Management Entity
  • MBMS Multimedia Broadcast Multicast Service
  • BM-SC Broadcast Multicast Service Center
  • PDN Packet Data Network
  • the MME 162 may be in communication with a Home Subscriber Server (HSS) 174.
  • HSS Home Subscriber Server
  • the MME 162 is the control node that processes the signaling between the UEs 104 and the EPC 160.
  • the MME 162 provides bearer and connection management. All user Internet protocol (IP) packets are transferred through the Serving Gateway 166, which itself is connected to the PDN Gateway 172.
  • IP Internet protocol
  • the PDN Gateway 172 provides UE IP address allocation as well as other functions.
  • the PDN Gateway 172 and the BM-SC 170 are connected to the IP Services 176.
  • the IP Services 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS) , a PS Streaming Service, and/or other IP services.
  • the BM-SC 170 may provide functions for MBMS user service provisioning and delivery.
  • the BM-SC 170 may serve as an entry point for content provider MBMS transmission, may be used to authorize and initiate MBMS Bearer Services within a public land mobile network (PLMN) , and may be used to schedule MBMS transmissions.
  • PLMN public land mobile network
  • the MBMS Gateway 168 may be used to distribute MBMS traffic to the base stations 102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a particular service, and may be responsible for session management (start/stop) and for collecting eMBMS related charging information.
  • MMSFN Multicast Broadcast Single Frequency Network
  • the core network 190 may include an Access and Mobility Management Function (AMF) 192, other AMFs 193, a Session Management Function (SMF) 194, and a User Plane Function (UPF) 195.
  • the AMF 192 may be in communication with a Unified Data Management (UDM) 196.
  • the AMF 192 is the control node that processes the signaling between the UEs 104 and the core network 190.
  • the AMF 192 provides QoS flow and session management. All user Internet protocol (IP) packets are transferred through the UPF 195.
  • the UPF 195 provides UE IP address allocation as well as other functions.
  • the UPF 195 is connected to the IP Services 197.
  • the IP Services 197 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS) , a Packet Switch (PS) Streaming (PSS) Service, and/or other IP services.
  • IMS IP Multimedia Subsystem
  • PS Packet Switch
  • PSS Packet
  • the base station may include and/or be referred to as a gNB, Node B, eNB, an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS) , an extended service set (ESS) , a transmit reception point (TRP) , or some other suitable terminology.
  • the base station 102 provides an access point to the EPC 160 or core network 190 for a UE 104.
  • Examples of UEs 104 include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA) , a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player) , a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor/actuator, a display, or any other similar functioning device.
  • SIP session initiation protocol
  • PDA personal digital assistant
  • the UEs 104 may be referred to as IoT devices (e.g., parking meter, gas pump, toaster, vehicles, heart monitor, etc. ) .
  • the UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.
  • the UE 104 may include an uplink beam report component 198 configured to transmit, to the base station 102 or 180, an indication of the UE capability to provide a beam report for at least one of uplink beam selection, downlink beam selection, or beam failure. Then the uplink beam report component 198 may be configured to receive a configuration from the base station 102 or 180 to provide the beam report based on the UE capability. Then the uplink beam report component 198 may be configured to transmit the beam report to the base station 102 or 180 based on the configuration and the UE capability to provide the beam report.
  • the event may be an autonomous event determined by the UE or may be based on a configuration from the base station.
  • the base station 102 or 180 may include an uplink beam report event configuration component 199 that configures the UE 104 for the event that triggers an uplink beam report from the UE.
  • the UE may indicate whether it has the capabilities for certain UL beam selection.
  • FIG. 2A is a diagram 200 illustrating an example of a first subframe within a 5G/NR frame structure.
  • FIG. 2B is a diagram 230 illustrating an example of DL channels within a 5G/NR subframe.
  • FIG. 2C is a diagram 250 illustrating an example of a second subframe within a 5G/NR frame structure.
  • FIG. 2D is a diagram 280 illustrating an example of UL channels within a 5G/NR subframe.
  • the 5G/NR frame structure may be frequency division duplexed (FDD) in which for a particular set of subcarriers (carrier system bandwidth) , subframes within the set of subcarriers are dedicated for either DL or UL, or may be time division duplexed (TDD) in which for a particular set of subcarriers (carrier system bandwidth) , subframes within the set of subcarriers are dedicated for both DL and UL.
  • FDD frequency division duplexed
  • TDD time division duplexed
  • the 5G/NR frame structure is assumed to be TDD, with subframe 4 being configured with slot format 28 (with mostly DL) , where D is DL, U is UL, and X is flexible for use between DL/UL, and subframe 3 being configured with slot format 34 (with mostly UL) . While subframes 3, 4 are shown with slot formats 34, 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0, 1 are all DL, UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible symbols.
  • UEs are configured with the slot format (dynamically through DL control information (DCI) , or semi-statically/statically through radio resource control (RRC) signaling) through a received slot format indicator (SFI) .
  • DCI DL control information
  • RRC radio resource control
  • SFI received slot format indicator
  • a frame (10 ms) may be divided into 10 equally sized subframes (1 ms) .
  • Each subframe may include one or more time slots.
  • Subframes may also include mini-slots, which may include 7, 4, or 2 symbols.
  • Each slot may include 7 or 14 symbols, depending on the slot configuration. For slot configuration 0, each slot may include 14 symbols, and for slot configuration 1, each slot may include 7 symbols.
  • the symbols on DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols.
  • the symbols on UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also referred to as single carrier frequency-division multiple access (SC-FDMA) symbols) (for power limited scenarios; limited to a single stream transmission) .
  • the number of slots within a subframe is based on the slot configuration and the numerology. For slot configuration 0, different numerologies ⁇ 0 to 5 allow for 1, 2, 4, 8, 16, and 32 slots, respectively, per subframe. For slot configuration 1, different numerologies 0 to 2 allow for 2, 4, and 8 slots, respectively, per subframe. Accordingly, for slot configuration 0 and numerology ⁇ , there are 14 symbols/slot and 2 ⁇ slots/subframe.
  • the subcarrier spacing and symbol length/duration are a function of the numerology.
  • the subcarrier spacing may be equal to 2 ⁇ *15 kHz, where ⁇ is the numerology 0 to 5.
  • ⁇ is the numerology 0 to 5.
  • the symbol length/duration is inversely related to the subcarrier spacing.
  • the slot duration is 0.25 ms
  • the subcarrier spacing is 60 kHz
  • the symbol duration is approximately 16.67 ⁇ s.
  • a resource grid may be used to represent the frame structure.
  • Each time slot includes a resource block (RB) (also referred to as physical RBs (PRBs) ) that extends 12 consecutive subcarriers.
  • RB resource block
  • PRBs physical RBs
  • the resource grid is divided into multiple resource elements (REs) . The number of bits carried by each RE depends on the modulation scheme.
  • the RS may include demodulation RS (DM-RS) (indicated as R x for one particular configuration, where 100x is the port number, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RS) for channel estimation at the UE.
  • DM-RS demodulation RS
  • CSI-RS channel state information reference signals
  • the RS may also include beam measurement RS (BRS) , beam refinement RS (BRRS) , and phase tracking RS (PT-RS) .
  • BRS beam measurement RS
  • BRRS beam refinement RS
  • PT-RS phase tracking RS
  • FIG. 2B illustrates an example of various DL channels within a subframe of a frame.
  • the physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) , each CCE including nine RE groups (REGs) , each REG including four consecutive REs in an OFDM symbol.
  • a primary synchronization signal (PSS) may be within symbol 2 of particular subframes of a frame. The PSS is used by a UE 104 to determine subframe/symbol timing and a physical layer identity.
  • a secondary synchronization signal (SSS) may be within symbol 4 of particular subframes of a frame. The SSS is used by a UE to determine a physical layer cell identity group number and radio frame timing.
  • the UE can determine a physical cell identifier (PCI) . Based on the PCI, the UE can determine the locations of the aforementioned DM-RS.
  • the physical broadcast channel (PBCH) which carries a master information block (MIB) , may be logically grouped with the PSS and SSS to form a synchronization signal (SS) /PBCH block.
  • the MIB provides a number of RBs in the system bandwidth and a system frame number (SFN) .
  • the physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH such as system information blocks (SIBs) , and paging messages.
  • SIBs system information blocks
  • some of the REs carry DM-RS (indicated as R for one particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station.
  • the UE may transmit DM-RS for the physical uplink control channel (PUCCH) and DM-RS for the physical uplink shared channel (PUSCH) .
  • the PUSCH DM-RS may be transmitted in the first one or two symbols of the PUSCH.
  • the PUCCH DM-RS may be transmitted in different configurations depending on whether short or long PUCCHs are transmitted and depending on the particular PUCCH format used.
  • the UE may transmit sounding reference signals (SRS) .
  • the SRS may be transmitted in the last symbol of a subframe.
  • the SRS may have a comb structure, and a UE may transmit SRS on one of the combs.
  • the SRS may be used by a base station for channel quality estimation to enable frequency-dependent scheduling on the UL.
  • FIG. 2D illustrates an example of various UL channels within a subframe of a frame.
  • the PUCCH may be located as indicated in one configuration.
  • the PUCCH carries uplink control information (UCI) , such as scheduling requests, a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a rank indicator (RI) , and hybrid automatic repeat request (HARQ) ACK/NACK feedback.
  • UCI uplink control information
  • the PUSCH carries data, and may additionally be used to carry a buffer status report (BSR) , a power headroom report (PHR) , and/or UCI.
  • BSR buffer status report
  • PHR power headroom report
  • FIG. 3 is a block diagram of a base station 310 in communication with a UE 350 in an access network.
  • IP packets from the EPC 160 may be provided to a controller/processor 375.
  • the controller/processor 375 implements layer 3 and layer 2 functionality.
  • Layer 3 includes a radio resource control (RRC) layer
  • layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer.
  • RRC radio resource control
  • SDAP service data adaptation protocol
  • PDCP packet data convergence protocol
  • RLC radio link control
  • MAC medium access control
  • the controller/processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIBs) , RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release) , inter radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression/decompression, security (ciphering, deciphering, integrity protection, integrity verification) , and handover support functions; RLC layer functionality associated with the transfer of upper layer packet data units (PDUs) , error correction through ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs) , re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs) , demultiplexing of MAC SDUs
  • the transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions.
  • Layer 1 which includes a physical (PHY) layer, may include error detection on the transport channels, forward error correction (FEC) coding/decoding of the transport channels, interleaving, rate matching, mapping onto physical channels, modulation/demodulation of physical channels, and MIMO antenna processing.
  • the TX processor 316 handles mapping to signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK) , quadrature phase-shift keying (QPSK) , M-phase-shift keying (M-PSK) , M-quadrature amplitude modulation (M-QAM) ) .
  • BPSK binary phase-shift keying
  • QPSK quadrature phase-shift keying
  • M-PSK M-phase-shift keying
  • M-QAM M-quadrature amplitude modulation
  • the coded and modulated symbols may then be split into parallel streams.
  • Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and/or frequency domain, and then combined together using an Inverse Fast Fourier Transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream.
  • IFFT Inverse Fast Fourier Transform
  • the OFDM stream is spatially precoded to produce multiple spatial streams.
  • Channel estimates from a channel estimator 374 may be used to determine the coding and modulation scheme, as well as for spatial processing.
  • the channel estimate may be derived from a reference signal and/or channel condition feedback transmitted by the UE 350.
  • Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318TX.
  • Each transmitter 318TX may modulate an RF carrier with a respective spatial stream for transmission.
  • each receiver 354RX receives a signal through its respective antenna 352.
  • Each receiver 354RX recovers information modulated onto an RF carrier and provides the information to the receive (RX) processor 356.
  • the TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions.
  • the RX processor 356 may perform spatial processing on the information to recover any spatial streams destined for the UE 350. If multiple spatial streams are destined for the UE 350, they may be combined by the RX processor 356 into a single OFDM symbol stream.
  • the RX processor 356 then converts the OFDM symbol stream from the time-domain to the frequency domain using a Fast Fourier Transform (FFT) .
  • FFT Fast Fourier Transform
  • the frequency domain signal comprises a separate OFDM symbol stream for each subcarrier of the OFDM signal.
  • the symbols on each subcarrier, and the reference signal are recovered and demodulated by determining the most likely signal constellation points transmitted by the base station 310. These soft decisions may be based on channel estimates computed by the channel estimator 358.
  • the soft decisions are then decoded and deinterleaved to recover the data and control signals that were originally transmitted by the base station 310 on the physical channel.
  • the data and control signals are then provided to the controller/processor 359, which implements layer 3 and layer 2 functionality.
  • the controller/processor 359 can be associated with a memory 360 that stores program codes and data.
  • the memory 360 may be referred to as a computer-readable medium.
  • the controller/processor 359 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, and control signal processing to recover IP packets from the EPC 160.
  • the controller/processor 359 is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations.
  • the controller/processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting; PDCP layer functionality associated with header compression/decompression, and security (ciphering, deciphering, integrity protection, integrity verification) ; RLC layer functionality associated with the transfer of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.
  • RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting
  • PDCP layer functionality associated with header
  • Channel estimates derived by a channel estimator 358 from a reference signal or feedback transmitted by the base station 310 may be used by the TX processor 368 to select the appropriate coding and modulation schemes, and to facilitate spatial processing.
  • the spatial streams generated by the TX processor 368 may be provided to different antenna 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a respective spatial stream for transmission.
  • the UL transmission is processed at the base station 310 in a manner similar to that described in connection with the receiver function at the UE 350.
  • Each receiver 318RX receives a signal through its respective antenna 320.
  • Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to a RX processor 370.
  • the controller/processor 375 can be associated with a memory 376 that stores program codes and data.
  • the memory 376 may be referred to as a computer-readable medium.
  • the controller/processor 375 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover IP packets from the UE 350. IP packets from the controller/processor 375 may be provided to the EPC 160.
  • the controller/processor 375 is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations.
  • At least one of the TX processor 368, the RX processor 356, and the controller/processor 359 may be configured to perform aspects in connection with uplink beam report component 198 of FIG. 1.
  • At least one of the TX processor 316, the RX processor 370, and the controller/processor 375 may be configured to perform aspects in connection with uplink beam report event configuration component 199 of FIG. 1.
  • a base station 102 or 180 may operate in millimeter wave (mmW) frequencies, and/or near mmW frequencies (e.g., 3 GHz –300 GHz) to communicate with the UE 104. Communication using the mmW/near mmW radio frequency (RF) band may experience high path loss and a short range.
  • the base station may utilize beamforming, e.g., as illustrated at 182 in FIG. 1, with the UE 104 to compensate for the path loss and short range.
  • a mmW UE may perform directional beamforming to boost power of uplink transmissions to the base station.
  • high-band spectrum e.g., frequency band above 24 GHz
  • operating telecommunication networks using the mmW/near mmW RF band may have telecommunication providers place small cells closer together to relay signals to farther distances or around obstacles. This may increase RF energy emitted by the cells and the receiving device (e.g., UE) .
  • a maximum permissible exposure (MPE) level may define a highest energy density that may be exposed to or near a human body.
  • the MPE value may be defined by standards or regulations, which may limit some operations for wireless devices, e.g., placing limits on uplink transmission for UEs.
  • the MPE restrictions may be more stringent for a mmW band (e.g., 30-300GHz) as the electromagnetic wave in the mmW band may cause various human body resonances.
  • An MPE level may be determined based on a consideration of the exposure of a human body to a wireless device’s transmission antenna, such as when a user’s finger (s) and/or hand (s) are placed near the transmission antenna while holding the wireless device, e.g., rather than other objects that may be placed/located near the phone. Therefore, a wireless device may include components for detecting whether a part of a human body is within a range of a transmission antenna (e.g., transmitter) , such as by using a radar, a sensor, etc. to detect the presence of a body part near the transmission antenna.
  • a transmission antenna e.g., transmitter
  • the wireless device may reduce a transmission power of the affected antenna (s) in order to meet the MPE limit.
  • an uplink transmission from the wireless device to a base station on an uplink beam may have a good channel quality/condition.
  • the uplink beam may experience a reduced channel condition or possibly even a beam failure.
  • the base station may select a new uplink beam for the wireless device or initiate a beam failure recovery procedure.
  • a base station may use one or more transmission configuration indicator (TCI) states to indicate to a UE one or more uplink transmission beams to use for a particular uplink reference signal or uplink channel.
  • TCI state may be used to configure a quasi-co-location (QCL) relationship between a reference signal and an uplink transmission beam for the reference signal or uplink channel.
  • QCL quasi-co-location
  • a base station may use a TCI state to indicate a QCL relationship between a downlink reference signal in a CSI-RS set and a PDSCH DM-RS ports.
  • a TCI state/framework may similarly provide configuration information for uplink transmission beams for uplink reference signals or uplink channels, which may be referred to as uplink TCI (UL-TCI) .
  • Each UL-TCI state may include a source reference signal (RS) that is referenced to indicate the uplink transmission beam for a target uplink RS/channel.
  • RS source reference signal
  • Table 1 below illustrates an example UL-TCI framework.
  • a source RS may include an SRS, an SSB, a CSI-RS, etc.
  • the source RS may further include an indication for a UE panel, such as a UE panel identifier (ID) (discuss below) .
  • ID UE panel identifier
  • each antenna panel of a UE may be assigned or associated with a panel ID.
  • a base station or the UE may use the panel ID to indicate or differentiate a specific antenna panel of the UE.
  • the term “antenna panel” may refer to a component, an element or a device that has capabilities to serve as an interface between radio waves propagating through space and electric currents moving in metal conductors.
  • the term “antenna panel (s) ” may be used interchangeably with “panel (s) ” and/or “UE panel (s) ” in the disclosure.
  • a target UL RS/channel may include a PUCCH, an SRS, a PRACH, a PUSCH, etc.
  • the TCI state configuration may also indicate a QCL type relationship between the source RC and the target UL RS/channel.
  • each antenna panel may be distinguished from other antenna panel using different kinds of information.
  • the antenna panel or antenna panel ID may be used only for illustration purpose, and there are other alternatives for referring or indicating an antenna panel.
  • an antenna panel may be associated with a set of downlink or uplink signals and channels, and correspondingly, the antenna panel ID may be associated with the set of signal or channel IDs and indicated or derived by the signal or channel IDs.
  • a control resource set (CORESET) may be configured with a CORESET pool index.
  • a first antenna panel may be associated with a downlink control indication (DCI) in a CORESET with a first CORESET pool index value (e.g.
  • a second antenna panel may be associated with a DCI in a CORESET with a second CORESET pool index value (e.g. 1) .
  • an SRS set ID or SRS resource ID may be associated with the first antenna panel and another SRS set ID or SRS resource ID may be associated with the second antenna panel.
  • a beam ID or beam group ID may be associated with the first antenna panel, and another beam ID or beam group ID may be associated with the second antenna panel.
  • the beam may be a transmission configuration indication (TCI) state or a spatial filter setting for either downlink reception or uplink transmission and may be a spatial relation information indicated for transmitting uplink signals.
  • TCI transmission configuration indication
  • the beam may be indicated by a reference signal (RS) such as synchronization signal block (SSB) , channel-state-information (CSI) RS and/or SRS.
  • RS reference signal
  • SSB synchronization signal block
  • CSI channel-state-information
  • SRS reference signal
  • a first portion e.g., the first half group
  • a second portion e.g., the second half group
  • the first TCI state ID in the pair may be associated with the first antenna panel
  • the second TCI state ID in the pair may be associated with the second panel.
  • an uplink transmit power control configuration may include a close loop index, and an uplink transmission with a first close loop index value (e.g., zero (0) ) may be associated with the first antenna panel and another uplink transmission with a second close loop index value (e.g. 1) may be associated with the second antenna panel.
  • a first close loop index value e.g., zero (0)
  • a second close loop index value e.g. 1
  • an antenna port ID or antenna port group ID may be associated with the first antenna panel, and another antenna port ID or antenna port group ID may be associated with the second antenna panel, where the antenna port may include but not limited to a PUSCH antenna port, SRS antenna port, and phase-tracking RS antenna port.
  • a DMRS code division multiplexing (CDM) group ID may be associated with the first antenna panel, and another DMRS CDM group ID may be associated with the second antenna panel.
  • CDM code division multiplexing
  • the first DMRS CDM group may be associated with the first antenna panel
  • the second DMRS CDM group may be associated with the second antenna panel.
  • a timing advance group (TAG) ID may be associated with the first antenna panel
  • another TAG ID may be associated with the second antenna panel.
  • a PUCCH resource ID or resource group ID may be associated with the first antenna panel, and another PUCCH resource ID or resource group ID may be associated with the second antenna panel.
  • the first half group of PUCCH resource IDs may be associated with the first antenna panel, and the second half group of PUCCH resource IDs may be associated with the second antenna panel.
  • a radio network temporary identifier may be associated with the first antenna panel, and another RNTI may be associated with the second antenna panel.
  • a physical cell identity (PCI) or synchronization signal block (SSB) set ID may be associated with the first antenna panel, and another PCI or SSB set ID may be associated with the second antenna panel.
  • aspects presented herein may improve the efficiency and performance of telecommunication systems operating using UL-TCI frameworks.
  • Aspects presented herein may enable a UE to indicate to a base station whether the UE has one or more capabilities to support uplink and/or downlink related beam reporting. If the UE has the capabilities to provide uplink and/or downlink related beam reporting, the UE may provide beam selection (s) related information to the base station in the beam report. Additionally, or alternatively, the UE may use the beam report to report beam failure and/or address issues related to MPE to the base station. For example, a UE may transmit to a base station, an indication of a UE capability to provide a beam report, such as a beam report for uplink beam selection.
  • the UE may also indicate to the base station about a capability to provide a beam report for downlink beam selection, such as via a separate indication.
  • the UE may provide a single indication, or a joint indication, that indicates a capability to provide beam reports for both uplink and downlink beam selection.
  • the UE may indicate a capability to provide a beam report for beam failure of one or more uplink beams, such as beam failure of a transmission beam resulting from MPE-related issue (s) .
  • the UE may indicate the capability to provide the beam report for beam failure separately from indication (s) about the capability to provide the beam report for uplink/downlink beam selection.
  • the UE may provide a single indication, or a joint indication, that indicates a capability to provide beam reports for both the uplink/downlink beam selection and the beam failure.
  • FIG. 4 illustrates an example communication flow 400 between a UE 402 and a base station 404 that includes the UE 402 transmitting an indication of UE capability to provide a beam report for uplink (UL) and/or downlink (DL) beam selection and/or reporting.
  • UL uplink
  • DL downlink
  • the UE 402 may transmit an indication of a UE Capability A to provide a beam report for UL beam selection and/or an indication of a UE Capability B to provide a beam report for DL beam selection to the base station 404.
  • FIG. 4 illustrates the UE 402 transmitting indications separately, the UE 402 may transmit indications of the UE Capability A and the UE Capability B to the base station 404 together and/or as a single capability or in a single message.
  • the UE Capability A and the UE Capability B may be indicated in one set of UE capability reporting, such as a UE feature set message.
  • the base station 404 may configure the UE 402, such as through an RRC configuration, to provide the beam report (s) based on the reported UE capability. For example, if the UE 402 indicates a capability to provide beam reports for uplink beam selection (e.g., the UE Capability A) , at 407, the base station 404 may configure the UE 402 to provide a beam report which the base station 404 and/or the UE 402 may use for uplink beam selection.
  • the UE 402 indicates a capability to provide beam reports for uplink beam selection (e.g., the UE Capability A)
  • the base station 404 may configure the UE 402 to provide a beam report which the base station 404 and/or the UE 402 may use for uplink beam selection.
  • the base station 404 may configure the UE 402 to provide a beam report which the base station 404 and/or the UE 402 may use for downlink beam selection. In one example, if the UE 402 does not indicate a capability to provide the beam reports for uplink/downlink beam selection, the base station 404 may not configure the UE 402 to provide a corresponding report for the uplink/downlink beam selection.
  • the base station 404 may transmit an uplink grant (e.g., DCI) to the UE 402 to allocate time and frequency resources for the UE 402 to transmit the indicated beam report (e.g., beam report including uplink/downlink beam selection) to the base station 404.
  • the base station 404 may allocate the time and frequency resources to the UE 402 via a medium access control-control element (MAC-CE) .
  • MAC-CE medium access control-control element
  • the UE 402 may transmit a beam report including a UL/DL beam selection to the base station 404 using the resources allocated in the uplink grant (e.g., received at 409) from the base station 404.
  • the UE may transmit the beam report via a MAC-CE.
  • the UL and DL beam selection (s) may be performed in one or more ways.
  • the DL beam selection may be based on a metric of reference signal received power (RSRP)
  • the UL beam selection may be based on a metric of virtual estimated RSRP (e.g., maximum transmit power minus path loss) .
  • the UE 402 may report at least one beam and also the corresponding beam metric.
  • the beam report may be configured based at least in part on the RRC configuration from the base station 404 and according to the capability reported by the UE 402 (e.g., the UE Capability A and/or the UE Capability B) .
  • the beam report may include a reference signal identifier (RS ID) , a beam ID and/or a panel ID (e.g., for a UE panel) for the UL beam selection, for the DL beam selection, or for both DL and UL beam selections.
  • An RS ID in the beam report 411 may include or correspond to a channel state information reference signal resource indicator (CRI) , a synchronization signal/physical broadcast channel resource block indicator (SSBRI) , or an SRS ID for the uplink beam selection and/or the downlink beam selection.
  • CRI channel state information reference signal resource indicator
  • SSBRI synchronization signal/physical broadcast channel resource block indicator
  • a beam ID in the beam report transmitted at 411 may include or correspond to a downlink TCI state ID, an uplink TCI state ID, or a spatial relation ID for the uplink beam selection and/or the downlink beam selection.
  • the panel ID may indicate an antenna panel in which the base station 404 and/or the UE 402 may use for the uplink beam selection and/or the downlink beam selection.
  • the UE 402 may communicate with the base station 404 using the UL beam and/or the DL beam based on the beam report.
  • the base station 404 may use the beam report to select an uplink beam and/or a downlink beam for the UE to use in communication with the base station 404.
  • FIG. 5 illustrates an example communication flow 500 between a UE 502 and a base station 504 that includes the UE 502 transmitting an indication of a UE capability to provide a beam report for beam failure.
  • the uplink beam report may provide the base station 504 with information about one or more failed beams.
  • the beam failure may be based, at least in part, on a transmission power reduction due to the MPE limitation. Therefore, based on the reported beam failure, the base station 504 and/or the UE 502 may communicate with each other using different beam (s) to improve the communication.
  • the UE 502 may transmit an indication of a UE capability to provide a beam report for a UL beam failure to the base station 504.
  • the base station 504 may configure the UE 502, such as through an RRC configuration, to provide a beam report when one or more beam failures are detected or determined by the UE 502.
  • the base station 504 may configure the UE 502 to provide a beam report for a UL beam failure detected by the UE 502 if the UE 502 has indicated a UE capability to report UL beam failure to the base station 504. If the UE 502 does not indicate a capability to provide a report for UL beam failure, the base station 504 may not configure the UE 502 to provide a report that includes the UL beam failure.
  • the UE 502 may start performing beam failure detection to detect a beam failure, e.g., a beam failure of an uplink beam for transmission of an uplink reference signal or an uplink channel.
  • a beam failure e.g., a beam failure of an uplink beam for transmission of an uplink reference signal or an uplink channel.
  • the one or more beam failure (s) detected by the UE 502 for one of more uplink beam may result from MPE related issue (s) .
  • the UE 502 may have reduced transmission power of one or more transmission antenna (s) to conform with an MPE regulation.
  • the UE 502 may transmit a scheduling request (SR) to the base station 504 to request resources to transmit the beam report if a beam failure is detected, e.g., such as resources for transmitting the beam report in a MAC-CE.
  • SR scheduling request
  • the base station 504 may transmit an uplink grant (e.g., in a UL DCI) to the UE 502 allocating the time and/or frequency resources in which the UE 502 may use for transmitting the beam report. For example, the base station 504 may allocate resources for a MAC-CE in which the UE 502 may use for transmitting the beam report.
  • an uplink grant e.g., in a UL DCI
  • the UE 502 may transmit the beam report that includes information related to one or more UL beam failure (s) to the base station 504, such as by using the resources allocated in the uplink grant (e.g., at 511) .
  • the UE 502 may transmit the beam report based on the RRC configuration and/or the UE’s capability to provide the beam report.
  • the UE 502 may also transmit the beam report based on whether a beam failure is detected by the UE 502 (e.g., at 508) , and the UE 502 may indicate a failure of one or more UL beams.
  • the beam report may further indicate the failure of at least one UL beam is based, at least in part, on the MPE.
  • the beam report may also indicate at least one of a failed uplink beam identifier, a cell ID, a panel ID related to the failed UL beam (e.g., antenna panel used for transmitting the failed UL beam) , a new uplink beam ID/panel ID, a power back-off due to the MPE or a combination thereof.
  • the base station 504 and/or the UE 502 may select a new beam based on the beam failure report.
  • a UE may indicate the capability to provide the beam report for beam selection, as described in connection with FIG. 4, and the beam failure, as described in connection with FIG. 5, using a single capability indicator, e.g., through a same indication.
  • the UE may indicate capability to provide the beam report for beam selection and the beam failure using different capability indicators, e.g., through separate indications.
  • a UE may provide a beam report for beam selection, as described in connection with FIG. 4, and the UE may also provide another beam report for addressing the beam failure, as described in connection with FIG. 5.
  • FIG. 6 is a flowchart of a method 600 of wireless communication.
  • the method may be performed by a UE or a component of a UE (e.g., the UE 104, 350, 402, 502; a processing system, which may include the memory 360 and which may be the entire UE 350 or a component of the UE 350, such as the TX processor 368, the RX processor 356, and/or the controller/processor 359) .
  • a dashed line may enable the UE to provide UE capability information related to beam selection reporting and/or beam failure reporting to a base station, such that the base station may configure the UE to provide beam reports for beam selection and/or beam failure.
  • the UE transmits, to a base station, an indication of a UE capability to provide a beam report for at least one of uplink beam selection, downlink beam selection, or beam failure.
  • the indication may indicate the UE capability to provide the beam report for the uplink beam selection, the beam report for the downlink beam selection or the beam report for both the uplink beam selection and the downlink beam selection, such as described in connection with FIG. 4.
  • the UE may indicate a capability to provide the beam report for beam selection and the beam failure using a single capability indicator or using different capability indicators, such as described in connection with FIG. 5.
  • the beam report may include a channel state information reference signal resource indicator, or an SSBRI.
  • the UE may transmit the indication to the base station e.g., by the UE capability component 740 and/or the transmission component 734 of the apparatus 702 in FIG. 7.
  • the beam report may indicate one or more uplink transmission beam.
  • the beam report may optionally or additionally indicate one or more antenna panel at the UE for uplink transmission.
  • the beam report may indicate or identify an antenna panel such as described in connection with Table 1.
  • the UE may determine the beam failure, and the UE may transmit the beam report in response to determining the beam failure and based on the configuration and the UE capability.
  • the beam report may indicate a failure of one or more uplink beams.
  • the beam report may indicate a failure of at least one uplink beam based, at least in part, on an MPE.
  • the beam report may indicate a failed uplink beam identifier, a cell ID, a panel ID and/or a new uplink beam ID.
  • the beam report may be transmitted in a MAC-CE.
  • the UE receives a configuration from the base station to provide the beam report based on the UE capability.
  • the configuration may be received, e.g., in RRC signaling from the base station, such as illustrated at 405 in FIG. 4 or at 505 in FIG. 5.
  • the configuration may be based on the indicated UE capability.
  • the configuration may configure the UE to provide a beam report for uplink and/or downlink beam selection.
  • the configuration may configure the UE to provide a beam report for beam failure.
  • the UE may receive the configuration from the base station e.g., by the UE beam report component 742 and/or the reception component 730 of the apparatus 702 in FIG. 7.
  • the UE transmits the beam report to the base station based on the configuration and the UE capability to provide the beam report.
  • the beam report may comprise a reference signal ID and/or a beam ID for uplink beam selection and/or downlink beam selection.
  • the beam report may include at least one reference signal ID corresponding to a CRI, an SSBRI, or an SRS ID for the uplink beam selection or the downlink beam selection.
  • the beam report may include at least one beam ID corresponding to a downlink TCI state ID, an uplink TCI state ID, or a spatial relation ID for the uplink beam selection or the downlink beam selection.
  • the beam report may be transmitted in a MAC-CE.
  • the UE may transmit the beam report to the base station e.g., by the UE beam report transmission component 744 and/or the transmission component 734 of the apparatus 702 in FIG. 7.
  • the UE may detect or determine a beam failure of one or more uplink beam. If the configuration received by UE configures the UE to provide beam report for beam failure, the UE may transmit the beam report in response to determining the beam failure and based on the configuration and the UE capability.
  • the beam report may indicate a failure of one or more uplink beams. If the beam failure is caused in whole or in part by issues related to MPE, the beam report may indicate a failure of at least one uplink beam based, at least in part, on an MPE.
  • the beam report may indicate a failed uplink beam identifier, a cell ID, a panel ID, and/or a new uplink beam ID.
  • the UE may determine a beam failure e.g., by the beam failure detection component 746 of the apparatus 702 in FIG. 7.
  • the UE may, at 608, transmit an SR to base station that requests resources to transmit the beam report, such as described in connection with 509 in FIG. 5.
  • The at 610, the UE may receive an uplink grant from the base station allocating the resources, e.g., to transmit the MAC-CE.
  • the UE may transmit the beam report using the resources allocated in the uplink grant.
  • the UE may transmit the SR to the base station e.g., by the SR component 748 and/or the transmission component 734 of the apparatus 702 in FIG. 7.
  • the UE may receive a selection of at least one of an uplink beam or a downlink beam based on the beam report.
  • the UE may receive the selection from the base station e.g., by the beam selection component 752 and/or the reception component 730 of the apparatus 702 in FIG. 7.
  • the UE may communicate with the base station using the uplink beam or the downlink beam based on the beam report.
  • FIG. 7 is a diagram 700 illustrating an example of a hardware implementation for an apparatus 702.
  • the apparatus 702 is a UE and includes a cellular baseband processor 704 (also referred to as a modem) coupled to a cellular RF transceiver 722 and one or more subscriber identity modules (SIM) cards 720, an application processor 706 coupled to a secure digital (SD) card 708 and a screen 710, a Bluetooth module 712, a wireless local area network (WLAN) module 714, a Global Positioning System (GPS) module 716, and a power supply 718.
  • the cellular baseband processor 704 communicates through the cellular RF transceiver 722 with the UE 104 and/or BS 102/180.
  • the cellular baseband processor 704 may include a computer-readable medium/memory.
  • the computer-readable medium/memory may be non-transitory.
  • the cellular baseband processor 704 is responsible for general processing, including the execution of software stored on the computer-readable medium/memory.
  • the software when executed by the cellular baseband processor 704, causes the cellular baseband processor 704 to perform the various functions described supra.
  • the computer-readable medium/memory may also be used for storing data that is manipulated by the cellular baseband processor 704 when executing software.
  • the cellular baseband processor 704 further includes a reception component 730, a communication manager 732, and a transmission component 734.
  • the communication manager 732 includes the one or more illustrated components.
  • the components within the communication manager 732 may be stored in the computer-readable medium/memory and/or configured as hardware within the cellular baseband processor 704.
  • the cellular baseband processor 704 may be a component of the UE 350 and may include the memory 360 and/or at least one of the TX processor 368, the RX processor 356, and the controller/processor 359.
  • the apparatus 702 may be a modem chip and include just the baseband processor 704, and in another configuration, the apparatus 702 may be the entire UE (e.g., see 350 of FIG. 3) and include the aforediscussed additional modules of the apparatus 702.
  • the communication manager 732 includes a UE capability component 740 that is configured to transmit, to a base station, an indication of a UE capability to provide a beam report for at least one of uplink beam selection, downlink beam selection, or beam failure, e.g., as described in connection with 602 of FIG. 6.
  • the communication manager 732 further includes a beam report component 742 that is configured to receiving a configuration from the base station to provide the beam report based on the UE capability, e.g., as described in connection with 604 of FIG. 6.
  • the communication manager 732 further includes a beam report transmission component 744 that is configured to transmit the beam report to the base station based on the configuration and the UE capability to provide the beam report, e.g., as described in connection with 612 of FIG. 6.
  • the communication manager 732 further includes a beam report transmission component 744 that is configured to transmit the beam report to the base station based on the configuration and the UE capability to provide the beam report, e.g., as described in connection with 612 of FIG. 6.
  • the communication manager 732 may further include a beam failure detection component 746 that is configured to determine beam failure, e.g., as described in connection with 606 of FIG. 6.
  • the communication manager 732 may further include an SR component 748 that is configured to transmit an SR that requests resources to transmit a MAC-CE comprising the beam report, e.g., as described in connection with 608 of FIG. 6.
  • the communication manager 732 may further include an uplink grant component 750 that is configured to receive an uplink grant allocating resources to transmit the MAC-CE, e.g., as described in connection with 610 of FIG. 6.
  • the communication manager 732 may further include a beam selection component 752 that is configured to receive a selection of an uplink and/or downlink beam based on the beam report, e.g., as described in connection with 614 of FIG. 6.
  • the apparatus may include additional components that perform each of the blocks of the algorithm in the aforementioned flowchart of FIG. 6. As such, each block in the aforementioned flowchart of FIG. 6 may be performed by a component and the apparatus may include one or more of those components.
  • the components may be one or more hardware components specifically configured to carry out the stated processes/algorithm, implemented by a processor configured to perform the stated processes/algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof.
  • the apparatus 702 includes means for transmitting, to a base station, an indication of a UE capability to provide a beam report for at least one of uplink beam selection, downlink beam selection, or beam failure (e.g., the UE capability component 740 and/or the transmission component 734) .
  • the apparatus 702 includes means for receiving a configuration from the base station to provide the beam report based on the UE capability (e.g., the beam report component 742) .
  • the apparatus 702 includes means for transmitting the beam report to the base station based on the configuration and the UE capability to provide the beam report (e.g., the UE beam report transmission component 744 and/or the transmission component 734) .
  • the apparatus may further include means for receiving a selection of at least one of an uplink beam or a downlink beam based on the beam report (e.g., the beam selection component 752) , and means for communicating with the base station using the uplink beam or the downlink beam based on the beam report (e.g., the transmission component 734) .
  • the apparatus may further include means for determining the beam failure (e.g., the beam failure detection component 746) , where the UE transmits the beam report in response to determining the beam failure and based on the configuration and the UE capability (e.g., the beam failure detection component 746 and/or the transmission component 734) .
  • the apparatus may further include means for transmitting a scheduling request that requests resources to transmit the MAC-CE comprising the beam report (e.g., the SR component 748) , and means for receiving an uplink grant allocating the resources to transmit the MAC-CE (e.g., the SR component 748 and/or the reception component 30) , where the beam report is transmitted using the resources allocated in the uplink grant (e.g., the transmission component 734) .
  • a scheduling request that requests resources to transmit the MAC-CE comprising the beam report
  • an uplink grant allocating the resources to transmit the MAC-CE e.g., the SR component 748 and/or the reception component 30
  • the beam report is transmitted using the resources allocated in the uplink grant (e.g., the transmission component 734) .
  • the aforementioned means may be one or more of the aforementioned components of the apparatus 702 configured to perform the functions recited by the aforementioned means.
  • the apparatus 702 may include the TX Processor 368, the RX Processor 356, and the controller/processor 359.
  • the aforementioned means may be the TX Processor 368, the RX Processor 356, and the controller/processor 359 configured to perform the functions recited by the aforementioned means.
  • FIG. 8 is a flowchart of a method 800 of wireless communication.
  • the method may be performed by a base station or a component of a base station (e.g., the base station 102, 180, 310, 404, 504; the processing system, which may include the memory 376 and which may be the entire base station 310 or a component of the base station 310, such as the TX processor 316, the RX processor 370, and/or the controller/processor 375) .
  • the processing system which may include the memory 376 and which may be the entire base station 310 or a component of the base station 310, such as the TX processor 316, the RX processor 370, and/or the controller/processor 375.
  • Optional aspects are illustrated with a dashed line.
  • the method may provide UE capability information to the base station in a manner that enables the base station to configure the UE for beam reports based on the UE capability.
  • the base station may receive, from a UE, an indication of a UE capability to provide a beam report for uplink beam selection, downlink beam selection, and/or beam failure.
  • the indication may indicate the UE capability to provide the beam report for the uplink beam selection, the beam report for the downlink beam selection, or the beam report for both the uplink beam selection and the downlink beam selection, as described in connection with FIG. 4.
  • the indication may indicate a UE capability to provide the beam report for beam selection and the beam failure using a single capability indicator or using different capability indicators, such as described in connection with FIG. 5.
  • the base station may receive the indication from the UE e.g., by the UE capability process component 940 and/or the reception component 930 of the apparatus 902 in FIG. 9
  • the beam report may indicate one or more uplink transmission beam.
  • the beam report may optionally or additionally indicate one or more antenna panel at the UE for uplink transmission.
  • the beam report may indicate or identify an antenna panel, such as described in connection with Table 1.
  • the beam report may indicate a failure of one or more uplink beams.
  • the beam report may indicate a failure of at least one uplink beam based, at least in part, on an MPE.
  • the beam report may indicate a failed uplink beam identifier, a cell ID, a panel ID and/or a new uplink beam ID.
  • the beam report may be transmitted in a MAC-CE.
  • the base station configures the UE to provide the beam report based on the UE capability.
  • the configuration may be transmitted, e.g., in RRC signaling to the UE, such as illustrated at 405 in FIG. 4 or at 505 in FIG. 5.
  • the configuration may be based on the indicated UE capability.
  • the configuration may configure the UE to provide a beam report for uplink and/or downlink beam selection.
  • the configuration may configure the UE to provide a beam report for beam failure.
  • the base station may configure the UE e.g., by the UE beam report configuration component 942 and/or the transmission component 934 of the apparatus 902 in FIG. 9
  • the base station receives the beam report from the UE based on the configuration and the UE capability to provide the beam report.
  • the beam report may be received, e.g., in a MAC-CE.
  • the base station may receive the beam report from the UE e.g., by the UE beam report reception component 944 and/or the reception component 930 of the apparatus 902 in FIG. 9
  • the aforementioned beam report may comprise at least one of an ID or a beam ID for at least one of the uplink beam selection or the downlink beam selection.
  • the beam report may include at least one reference signal ID corresponding to a CRI, an SSBRI, or an SRS ID for the uplink beam selection or the downlink beam selection.
  • the beam report may include at least one beam ID corresponding to a downlink TCI state ID, an uplink TCI state ID, or a spatial relation ID for the uplink beam selection or the downlink beam selection.
  • the beam report received by the base station at 810 may indicate a failure of one or more uplink beams. If the beam failure is in whole or in part resulted from MPE related issue (s) , the beam report may indicate the failure of at least one uplink beam based, at least in part, on the MPE. The beam report may also indicate a failed uplink beam identifier, a cell ID, a panel ID, a new uplink beam ID or a combination thereof.
  • the base station may, at 806, receive an SR from UE that requests resources to transmit the beam report, such as described in connection with 509 in FIG. 5.
  • the base station may receive the SR from the UE e.g., by the SR component 946 and/or the reception component 930 of the apparatus 902 in FIG. 9
  • the base station may transmit an uplink grant to the UE allocating the resources to for the beam report, where the beam report may be received using the resources allocated in the uplink grant. For example, the base station may allocate resources for a MAC-CE, and the beam report may be received in the MAC-CE.
  • the base station may transmit the uplink grant to the UE e.g., by the uplink grant component 948 and/or the transmission component 934 of the apparatus 902 in FIG. 9
  • the base station may, at 812, select at least one of an uplink beam or a downlink beam based on the beam report.
  • the base station may select the uplink beam or the downlink beam e.g., by the beam selection component 950 of the apparatus 902 in FIG. 9.
  • the base station may communicate with the UE using the uplink beam or the downlink beam based on the beam report.
  • the base station may communicate with the UE e.g., by the transmission component 934 and/or the reception component 930 of the apparatus 902 in FIG. 9.
  • FIG. 9 is a diagram 900 illustrating an example of a hardware implementation for an apparatus 902.
  • the apparatus 902 is a BS and includes a baseband unit 904.
  • the baseband unit 904 may communicate through a cellular RF transceiver 922 with the UE 104.
  • the baseband unit 904 may include a computer-readable medium/memory.
  • the baseband unit 904 is responsible for general processing, including the execution of software stored on the computer-readable medium/memory.
  • the software when executed by the baseband unit 904, causes the baseband unit 904 to perform the various functions described supra.
  • the computer-readable medium/memory may also be used for storing data that is manipulated by the baseband unit 904 when executing software.
  • the baseband unit 904 further includes a reception component 930, a communication manager 932, and a transmission component 934.
  • the communication manager 932 includes the one or more illustrated components.
  • the components within the communication manager 932 may be stored in the computer-readable medium/memory and/or configured as hardware within the baseband unit 904.
  • the baseband unit 904 may be a component of the BS 310 and may include the memory 376 and/or at least one of the TX processor 316, the RX processor 370, and the controller/processor 375.
  • the communication manager 932 includes a UE capability process component 940 that receives, from a UE, an indication of a UE capability to provide a beam report for at least one of uplink beam selection, downlink beam selection, or beam failure, e.g., as described in connection with 802 of FIG. 8.
  • the communication manager 932 further includes a UE beam report configuration component 942 that configures the UE to provide the beam report based on the UE capability, e.g., as described in connection with 804 of FIG. 8.
  • the communication manager 932 further includes a UE beam report reception component 944 that receives the beam report from the UE based on a configuration and the UE capability to provide the beam report, e.g., as described in connection with 810 of FIG. 8.
  • the communication manager 932 further includes an SR component 946 that receives an SR that requests resources to transmit a MAC-CE comprising the beam report, e.g., as described in connection with 806 of FIG. 8.
  • the communication manager 932 further includes an uplink grant component 948 that transmits an uplink grant allocating resources to transmit the MAC-CE, e.g., as described in connection with 808 of FIG. 8.
  • the communication manager 932 further includes a beam selection component 950 that selects an uplink beam and/or downlink beam based on the beam report, e.g., as described in connection with 812 of FIG. 8.
  • the apparatus may include additional components that perform each of the blocks of the algorithm in the aforementioned flowcharts of FIG. 8. As such, each block in the aforementioned flowcharts of FIG. 8 may be performed by a component and the apparatus may include one or more of those components.
  • the components may be one or more hardware components specifically configured to carry out the stated processes/algorithm, implemented by a processor configured to perform the stated processes/algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof.
  • the apparatus 902 includes means for receiving, from a UE, an indication of a UE capability to provide a beam report for at least one of uplink beam selection, downlink beam selection, or beam failure (e.g., the UE capability process component 940) .
  • the apparatus 902 includes means for configuring the UE to provide the beam report based on the UE capability (e.g., the UE beam report configuration component 942 and/or the transmission component 934) .
  • the apparatus 902 includes means for receiving the beam report from the UE based on a configuration and the UE capability to provide the beam report (e.g., the UE beam report reception component 944 and/or the reception component 930) .
  • the apparatus may further include means for selecting at least one of an uplink beam or a downlink beam based on the beam report (e.g., the beam selection component 950) , and means for communicating with the UE using the uplink beam or the downlink beam based on the beam report (e.g., the beam selection component 950, the reception component 930 and/or the transmission component 934) .
  • means for selecting at least one of an uplink beam or a downlink beam based on the beam report e.g., the beam selection component 950
  • means for communicating with the UE using the uplink beam or the downlink beam based on the beam report e.g., the beam selection component 950, the reception component 930 and/or the transmission component 934.
  • the apparatus may further include means for receiving a scheduling request that requests resources to transmit the MAC-CE comprising the beam report (e.g., the SR component 950 and/or the reception component 930) , and means for transmitting an uplink grant allocating the resources to transmit the MAC-CE (e.g., the uplink grant component 948 and/or the transmission component 934) , wherein the beam report is receiving using the resources allocated in the uplink grant (e.g., the UE beam report reception component 944 or the reception component) .
  • a scheduling request that requests resources to transmit the MAC-CE comprising the beam report
  • an uplink grant allocating the resources to transmit the MAC-CE e.g., the uplink grant component 948 and/or the transmission component 934
  • the beam report is receiving using the resources allocated in the uplink grant (e.g., the UE beam report reception component 944 or the reception component) .
  • the aforementioned means may be one or more of the aforementioned components of the apparatus 902 configured to perform the functions recited by the aforementioned means.
  • the apparatus 902 may include the TX Processor 316, the RX Processor 370, and the controller/processor 375.
  • the aforementioned means may be the TX Processor 316, the RX Processor 370, and the controller/processor 375 configured to perform the functions recited by the aforementioned means.
  • Aspect 1 is a method of wireless communication at a user equipment (UE) , comprising: transmitting, to a base station, an indication of a UE capability to provide a beam report for at least one of uplink beam selection, downlink beam selection, or beam failure; receiving a configuration from the base station to provide the beam report based on the UE capability; and transmitting the beam report to the base station based on the configuration and the UE capability to provide the beam report.
  • UE user equipment
  • the method of aspect 1 further includes that the beam report comprises a channel state information reference signal resource indicator (CRI) or a synchronization signal/physical broadcast channel Resource Block Indicator (SSBRI) .
  • CRI channel state information reference signal resource indicator
  • SSBRI synchronization signal/physical broadcast channel Resource Block Indicator
  • the method of aspect 1 or aspect 2 further includes that the UE capability is to provide the beam report for the uplink beam selection, the method further comprising: indicating one or more uplink transmission beams in the beam report.
  • the method of any of aspects 1-3 further includes that the beam report indicates one or more antenna panel at the UE for uplink transmission.
  • the method of any of aspects 1-4 further includes that the UE capability is to provide the beam report in response to the beam failure, the method further comprising: determining the beam failure, wherein the UE transmits the beam report in response to determining the beam failure and based on the configuration and the UE capability.
  • the method of any of aspects 1-5 further includes that the beam report indicates a failure of one or more uplink beams.
  • the method of any of aspects 1-6 further includes that the beam report indicates a failure of at least one uplink beam based, at least in part, on an MPE.
  • the method of any of aspects 1-7 further includes that the beam report indicates a failed uplink beam identifier, a cell ID, and a new uplink beam ID.
  • the method of any of aspects 1-8 further includes that the beam report is transmitted in a MAC-CE.
  • the method of any of aspects 1-9 further comprises: transmitting a scheduling request that requests resources to transmit the beam report; and receiving an uplink grant allocating the resources to transmit the beam report, and wherein the beam report is transmitted using the resources allocated in the uplink grant.
  • the method of any of aspects 1-10 further includes that the beam report comprises at least one of a reference signal ID or a beam ID for at least one of the uplink beam selection or the downlink beam selection.
  • the method of any of aspects 1-11 further includes that the beam report includes at least one reference signal ID corresponding to an SRS ID for the uplink beam selection or the downlink beam selection.
  • the method of any of aspects 9-12 further includes that the beam report includes at least one beam ID corresponding to a downlink TCI state ID, an uplink TCI state ID, or a spatial relation ID for the uplink beam selection or the downlink beam selection.
  • the method of any of aspects 1-13 further includes that the UE capability is to provide the beam report for at least one of the uplink beam selection or the downlink beam selection, the method further comprising: receiving a selection of at least one of an uplink beam or a downlink beam based on the beam report; and communicating with the base station using the uplink beam or the downlink beam based on the beam report.
  • the method of any of aspects 1-14 further includes that the UE capability is to provide the beam report for the downlink beam selection.
  • the method of any of aspects 1-15 further includes that the UE capability is to provide the beam report for the uplink beam selection and the downlink beam selection.
  • the method of any of aspects 1-16 further includes that the UE capability is to provide the beam report for beam selection and the beam failure using a single capability indicator.
  • the method of any of aspects 1-17 further includes that the UE capability is to provide the beam report for beam selection and the beam failure using different capability indicators.
  • Aspect 19 is an apparatus for wireless communication including at least one processor coupled to a memory and configured to implement a method as in any of aspects 1 to 18.
  • Aspect 20 is an apparatus for wireless communication including means for implementing a method as in any of aspects 1 to 18.
  • Aspect 21 is a non-transitory computer-readable medium storing computer executable code, where the code when executed by a processor causes the processor to implement a method as in any of aspects 1 to 18.
  • Aspect 22 is a method of wireless communication at a base station, comprising: receiving, from a UE, an indication of a UE capability to provide a beam report for at least one of uplink beam selection, downlink beam selection, or beam failure; configuring the UE to provide the beam report based on the UE capability; and receiving the beam report from the UE based on a configuration and the UE capability to provide the beam report.
  • the method of aspect 22 further includes that the beam report comprises a channel state information reference signal resource indicator (CRI) or an SSBRI.
  • CRI channel state information reference signal resource indicator
  • SSBRI SSBRI
  • the method of aspect 22 or aspect 23 further includes that the UE capability is to provide the beam report for the uplink beam selection, and the beam report indicates one or more uplink transmission beam.
  • the method of any of aspects 22-24 further includes that the beam report indicates one or more antenna panel at the UE for uplink transmission.
  • the method of any of aspects 22-25 further includes that the UE capability is to provide the beam report for at least one of the uplink beam selection or the downlink beam selection, the method further comprising: selecting at least one of an uplink beam or a downlink beam based on the beam report; and communicating with the UE using the uplink beam or the downlink beam based on the beam report.
  • the method of any of aspects 22-26 further includes that the UE capability is to provide the beam report for the beam failure, wherein the beam report indicates a failure of one or more uplink beams.
  • the method of any of aspects 22-27 further includes that the beam report indicates a failure of at least one uplink beam based, at least in part, on an MPE.
  • the method of any of aspects 22-28 further includes that the beam report indicates a failed uplink beam identifier, a cell ID, and a new uplink beam ID.
  • the method of any of aspects 22-29 further includes that the beam report is transmitted in a MAC-CE.
  • the method of any of aspects 22-30 further comprises: receiving a scheduling request that requests resources to transmit the MAC-CE comprising the beam report; transmitting an uplink grant allocating the resources to transmit the MAC-CE, wherein the beam report is received using the resources allocated in the uplink grant.
  • the method of any of aspects 22-31 further includes that the beam report comprises at least one of a reference signal ID or a beam ID for at least one of the uplink beam selection or the downlink beam selection.
  • the method of any of aspects 22-32 further includes that the beam report includes at least one reference signal ID corresponding to an SRS ID for the uplink beam selection or the downlink beam selection.
  • the method of any of aspects 22-33 further includes that the beam report includes at least one beam ID corresponding to a downlink TCI state ID, an uplink TCI state ID, or a spatial relation ID for the uplink beam selection or the downlink beam selection.
  • the method of any of aspects 22-34 further includes that the UE capability is to provide the beam report for the downlink beam selection.
  • the method of any of aspects 22-35 further includes that the UE capability is to provide the beam report for the uplink beam selection and the downlink beam selection.
  • the method of any of aspects 22-36 further includes that the UE indicates capability to provide the beam report for beam selection and the beam failure using a single capability indicator.
  • the method of any of aspects 22-37 further includes that the UE indicates capability to provide the beam report for beam selection and the beam failure using different capability indicators.
  • Aspect 39 is an apparatus for wireless communication including at least one processor coupled to a memory and configured to implement a method as in any of aspects 22 to 38.
  • Aspect 40 is an apparatus for wireless communication including means for implementing a method as in any of aspects 22 to 38.
  • Aspect 41 is a non-transitory computer-readable medium storing computer executable code, where the code when executed by a processor causes the processor to implement a method as in any of aspects 22 to 38.
  • Combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” include any combination of A, B, and/or C, and may include multiples of A, multiples of B, or multiples of C.
  • combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any such combinations may contain one or more member or members of A, B, or C.

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Abstract

Un équipement utilisateur (UE) transmet, à une station de base, une indication d'une capacité d'UE à fournir un rapport de faisceau pour au moins une parmi une sélection de faisceau de liaison montante, une sélection de faisceau de liaison descendante, ou une défaillance de faisceau. Ensuite, l'UE reçoit une configuration en provenance de la station de base pour fournir le rapport de faisceau sur la base de la capacité d'UE. L'UE transmet ensuite le rapport de faisceau à la station de base sur la base de la configuration et de la capacité d'UE à fournir le rapport de faisceau.
PCT/CN2020/138958 2020-02-07 2020-12-24 Capacité d'équipement utilisateur sur rapport lié à une sélection de faisceau de liaison montante WO2021155719A1 (fr)

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Publication number Priority date Publication date Assignee Title
WO2024059960A1 (fr) * 2022-09-19 2024-03-28 Qualcomm Incorporated Rapport de faisceau de liaison montante et de liaison descendante
WO2024073226A1 (fr) * 2022-09-30 2024-04-04 Qualcomm Incorporated Capacité d'utilisation d'un ensemble de configuration d'antenne pour un faisceau de liaison montante

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