WO2024254811A1 - Gestion de faisceau avec indications de saut de rapport de faisceau - Google Patents

Gestion de faisceau avec indications de saut de rapport de faisceau Download PDF

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Publication number
WO2024254811A1
WO2024254811A1 PCT/CN2023/100366 CN2023100366W WO2024254811A1 WO 2024254811 A1 WO2024254811 A1 WO 2024254811A1 CN 2023100366 W CN2023100366 W CN 2023100366W WO 2024254811 A1 WO2024254811 A1 WO 2024254811A1
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WIPO (PCT)
Prior art keywords
report
skipping
beam report
transmitting
aspects
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PCT/CN2023/100366
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English (en)
Inventor
Fang Yuan
Yan Zhou
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Qualcomm Inc
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Qualcomm Inc
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Priority to PCT/CN2023/100366 priority Critical patent/WO2024254811A1/fr
Publication of WO2024254811A1 publication Critical patent/WO2024254811A1/fr
Anticipated expiration legal-status Critical
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Classifications

    • 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
    • H04B7/06952—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

Definitions

  • sub-THz frequency spectrum can provide wide-bandwidth channels and ultra-high data rates.
  • a method of wireless communication by a user equipment comprising: performing a plurality of reference signal measurements associated with a plurality of beam directions; and transmitting, based on the reference signal measurements, a first beam report skipping indication, wherein the beam report skipping indication indicates one or more beam reporting occasions for which the UE will refrain from transmitting one or more beam reports.
  • a non-transitory, computer-readable memory comprises program code recorded thereon.
  • the program code is executable by a processor of a UE to cause the UE to perform a plurality of reference signal measurements associated with a plurality of beam directions; and transmit, based on the reference signal measurements, a first beam report skipping indication, wherein the beam report skipping indication indicates one or more beam reporting occasions for which the UE will refrain from transmitting one or more beam reports.
  • FIG. 2 is a timing diagram illustrating a radio frame structure according to some aspects of the present disclosure
  • FIG. 6B illustrates a beam report skipping scheme for a plurality of BRCs according to some aspects of the present disclosure.
  • An OFDMA network may implement a radio technology such as evolved UTRA (E-UTRA) , Institute of Electrical and Electronics Engineers (IEEE) 802.11, IEEE 802.16, IEEE 802.20, flash-OFDM and the like.
  • E-UTRA evolved UTRA
  • IEEE Institute of Electrical and Electronics Engineers
  • GSM Global System for Mobile communications
  • LTE long term evolution
  • UTRA, E-UTRA, GSM, UMTS and LTE are described in documents provided from an organization named “3rd Generation Partnership Project” (3GPP)
  • cdma2000 is described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) .
  • a 5G NR communication system may be implemented to use optimized OFDM-based waveforms with scalable numerology and transmission time interval (TTI) . Additional features may also include having a common, flexible framework to efficiently multiplex services and features with a dynamic, low-latency time division duplex (TDD) /frequency division duplex (FDD) design; and with advanced wireless technologies, such as massive multiple input, multiple output (MIMO) , robust millimeter wave (mmWave) transmissions, advanced channel coding, and device-centric mobility. Scalability of the numerology in 5G NR, with scaling of subcarrier spacing, may efficiently address operating diverse services across diverse spectrum and diverse deployments.
  • TTI transmission time interval
  • Additional features may also include having a common, flexible framework to efficiently multiplex services and features with a dynamic, low-latency time division duplex (TDD) /frequency division duplex (FDD) design; and with advanced wireless technologies, such as massive multiple input, multiple output (MIMO) , robust millimeter wave (mmWave) transmissions, advanced
  • the term “transmission beam” may refer to a transmitter transmitting a beamformed signal in a certain spatial direction or beam direction and/or with a certain beam width covering a certain spatial angular sector.
  • the transmission beam may have characteristics such as the beam direction and the beam width.
  • the term “reception beam” may refer to a receiver using beamforming to receive a signal from a certain spatial direction or beam direction and/or within a certain beam width covering a certain spatial angular sector.
  • the reception beam may have characteristics such as the beam direction and the beam width.
  • beam sweep or “beam sweeping” may refer to a wireless communication device using sequentially each beam of a set of predefined beams (directing to a set of predefined spatial directions) for transmissions or receptions over a time period to cover a certain angular sector spatially.
  • P1 is an initial beam pairing or beam discovery procedure performed prior to a connection is established between a BS and a UE.
  • a BS may implement periodic synchronization signal block (SSB) beam sweeping where the BS transmits SSBs across a set of beam directions (using a set of transmission beams at the BS) such that several relevant areas of a cell are reached.
  • SSB periodic synchronization signal block
  • a UE desiring to communicate with the BS may determine an optimal reception beam based on the SSB beams.
  • a UE may sweep across a set of beam directions (using a set of reception beams at the UE) to search for an appropriate beam direction for communicating with the BS.
  • the UE may apply a different reception beam for each occurrence of the periodic SSBs.
  • the UE may initiate a random access procedure with the BS using the determined reception beam.
  • the UE and the BS may establish a connection with each other.
  • the UE may determine a received signal measurement (e.g., a layer 1-reference signal received power (L1-RSRP) ) or other beam characteristics for each BS’s transmission beam or DL beam using a fixed received beam (the optimal reception beam determined during P1) .
  • the UE may report the receive signal measurements to the BS, for example, in the form of a sorted list of signal measurements from a highest received signal power to a lowest received signal power or vice versa.
  • the UE may report received signal measurements for DL beams that satisfies a certain threshold.
  • the UE may report received signal measurements for N best DL beams (with the higher receive signal measurement among all the DL beams) .
  • the BS and/or the UE may select an optimal DL beam (BS transmission beam) for subsequent communications.
  • P3 is a beam refinement procedure performed between the BS and the UE while the UE is in a connected mode, for example, after performing the P2 procedure.
  • the BS may transmit reference signals (e.g., CSI-RSs) using the narrow transmission beam selected from P2 while the UE sweeps across a set of beam directions (using reception beams at the UE) to refine the UE reception beam.
  • the UE may determine a signal measurement for each of the reception beams and select the reception beam with the highest signal measurement for subsequent communication with the BS.
  • a UE may detect changes in RSRP that are not likely to require beam management updates. For instance, the UE may move toward, or away from, the network node (e.g., gNB, TRP) . This may involve a change in the strength of the serving beam, but may not result in the serving beam being less suitable or less optimal for communications than the other available beams. In some instances, even if the UE moves tangentially with respect to the network node, the overall ranking of the beams may not have changed. Accordingly, the beam reports transmitted by the UE in these circumstances may not result in improved mobility or beam management outcomes.
  • the network node e.g., gNB, TRP
  • the present disclosure describes beam management and reporting mechanisms that allow a reporting device (e.g., UE, IoT device) to skip one or more beam reporting occasions.
  • the mechanisms described herein include the reporting device transmitting, to the network, an indication that one or more beam reporting occasions will be skipped. By skipping the beam reporting, the UE may conserve power and make more efficient use of network resources.
  • FIG. 1 illustrates a wireless communication network 100 according to some aspects of the present disclosure.
  • the network 100 may be a 5G network.
  • the network 100 includes a number of base stations (BSs) 105 (individually labeled as 105a, 105b, 105c, 105d, 105e, and 105f) and other network entities.
  • a BS 105 may be a station that communicates with UEs 115 (individually labeled as 115a, 115b, 115c, 115d, 115e, 115f, 115g, 115h, and 115k) and may also be referred to as an evolved node B (eNB) , a next generation eNB (gNB) , an access point, and the like.
  • eNB evolved node B
  • gNB next generation eNB
  • the BSs 105a-105c may serve the UEs 115a and 115b using 3D beamforming and coordinated spatial techniques, such as coordinated multipoint (CoMP) or multi-connectivity.
  • the macro BS 105d may perform backhaul communications with the BSs 105a-105c, as well as small cell, the BS 105f.
  • the macro BS 105d may also transmits multicast services which are subscribed to and received by the UEs 115c and 115d.
  • Such multicast services may include mobile television or stream video, or may include other services for providing community information, such as weather emergencies or alerts, such as Amber alerts or gray alerts.
  • the network 100 may also support mission critical communications with ultra-reliable and redundant links for mission critical devices, such as the UE 115e, which may be a drone. Redundant communication links with the UE 115e may include links from the macro BSs 105d and 105e, as well as links from the small cell BS 105f.
  • the BSs 105 may broadcast the PSS, the SSS, and/or the MIB in the form of synchronization signal block (SSBs) over a physical broadcast channel (PBCH) and may broadcast the RMSI and/or the OSI over a physical downlink shared channel (PDSCH) .
  • PBCH physical broadcast channel
  • PDSCH physical downlink shared channel
  • the UE 115 may transmit a connection request to the BS 105 and the BS 105 may respond with a connection response.
  • the connection response may indicate a contention resolution.
  • the random access preamble, the RAR, the connection request, and the connection response can be referred to as message 1 (MSG1) , message 2 (MSG2) , message 3 (MSG3) , and message 4 (MSG4) , respectively.
  • the random access procedure may be a two-step random access procedure, where the UE 115 may transmit a random access preamble and a connection request in a single transmission and the BS 105 may respond by transmitting a random access response and a connection response in a single transmission.
  • the UE 115 may initiate an initial network attachment procedure with the network 100.
  • the BS 105 may coordinate with various network entities or fifth generation core (5GC) entities, such as an access and mobility function (AMF) , a serving gateway (SGW) , and/or a packet data network gateway (PGW) , to complete the network attachment procedure.
  • 5GC fifth generation core
  • AMF access and mobility function
  • SGW serving gateway
  • PGW packet data network gateway
  • the BS 105 may coordinate with the network entities in the 5GC to identify the UE, authenticate the UE, and/or authorize the UE for sending and/or receiving data in the network 100.
  • the AMF may assign the UE with a group of tracking areas (TAs) .
  • TAs tracking areas
  • FIG. 2 is a timing diagram illustrating a radio frame structure 200 according to some aspects of the present disclosure.
  • the radio frame structure 200 may be employed by BSs such as the BSs 105 and UEs such as the UEs 115 in a network such as the network 100 for communications.
  • the BS may communicate with the UE using time-frequency resources configured as shown in the radio frame structure 200.
  • the x-axes represent time in some arbitrary units and the y-axes represent frequency in some arbitrary units.
  • the radio frame structure 200 includes a radio frame 201.
  • the duration of the radio frame 201 may vary depending on the aspects. In an example, the radio frame 201 may have a duration of about ten milliseconds.
  • the radio frame 201 includes M number of slots 202, where M may be any suitable positive integer. In an example, M may be about 10.
  • a BS may schedule a UE (e.g., UE 115 in FIG. 1) for UL and/or DL communications at a time-granularity of slots 202 or mini-slots 208.
  • Each slot 202 may be time-partitioned into K number of mini-slots 208.
  • Each mini-slot 208 may include one or more symbols 206.
  • the mini-slots 208 in a slot 202 may have variable lengths. For example, when a slot 202 includes N number of symbols 206, a mini-slot 208 may have a length between one symbol 206 and (N-1) symbols 206.
  • the network 100 may operate over a high frequency band, for example, in a frequency range 2 (FR2) band, frequency range 4 (FR4) band, or a frequency range 2 (FR5) band.
  • FR2 may refer to in mmWave frequency ranges.
  • FR4 and FR5 may refer to sub-THz frequency ranges.
  • the BSs 105 and the UEs 115 may communicate with each other using beamforming to generate directional beams for transmissions and/or receptions as shown in FIG. 3.
  • the TRPs 305 and the UE 115 may use beamforming techniques to generate transmit and/or reception beams for transmissions and/or receptions, respectively.
  • the TRP 305a may generate a set of transmission beams 310 (shown as 310a, 310b, and 310c) in a set of predefined beam directions.
  • the TRP 305b may generate a set of transmission beams 320 (shown as 320a, 320b, and 320c) in a set of predefined beam directions.
  • the UE 115 may generate a set of reception beams 330 (shown as 330a, 330b, and 330c) in a set of predefined beam directions.
  • each of the beams 310a-310c, 320a-320c, and 330a-330c may have a certain beam width covering a certain spatial angular sector.
  • FIG. 3 illustrates three beams for each of the TRP 305a, TRP 305b, and the UE 115, it should be understood that in other examples each of the TRP 305a, TRP 305b, and the UE 115 can utilize a fewer beams or a greater number of beams for communication.
  • the TRP 305a and the TRP 305b communicate with the UE 115 using beams that are along a line-of-sight (LOS) propagation path (e.g., between the beam 310c at the TRP 305a and the beam 330a at the UE 115, and between the beams 320b at the TRP 305b and the beam 330c at the UE 115)
  • LOS line-of-sight
  • the TRP 305a and/or the TRP 305b may use a transmission beam that is non-line-of-sight (NLOS) (e.g., reflected off a reflector or scatterer in the environment) to communicate with the UE 115 for communication.
  • NLOS non-line-of-sight
  • the TRP 305a and/or the TRP 305b may communicate with the UE 115 in a UL direction in the same beam direction.
  • the TRP 305a may generate a reception beam in the same beam direction as the beam 310c for receiving UL communications from the UE 115
  • the TRP 305b may generate a reception beam in the same beam direction as the beam 320b for receiving UL communications from the UE 115.
  • the UE 115 may generate a transmission beam in the same beam direction as the beam 330a for transmitting UL communications to the TRP 305a, and may generate a transmission beam in the same beam direction as the beam 330c for transmitting UL communications to the TRP 305b.
  • the TRP 305a and the UE 115 may communicate with each other in different beam directions for UL and for DL.
  • the TRP 305b and the UE 115 may communicate with each other in different beam directions for UL and for DL.
  • the UE and/or the BS may determine an optimal UL-DL beam pair for communications.
  • the BS and the UE may perform an initial beam pair selection.
  • the BS and the UE may refine the initial beam selection as will be discussed more fully below with reference to FIGS. 4 and 5.
  • FIG. 4 is a sequence diagram illustrating a communication method 400 with beam refinement operations according to some aspects of the present disclosure.
  • the method 400 may be performed by wireless networks, such as the networks 100 and/or 300 communicating over a high-frequency band, such as a mmWave band or a sub-THz band.
  • the method 400 is performed by a BS 105 and a UE 115.
  • the BS 105 may utilize one or more components, such as the processor 1102, the memory 1104, the beam module 1108, the transceiver 1110, the modem 1112, and the one or more antennas 1116 shown in FIG. 11, to execute the actions of the method 400.
  • the UE 115 may utilize one or more components, such as the processor 1202, the memory 1204, the beam module 1208, the transceiver 1210, the modem 1212, and the one or more antennas 1216 shown in FIG. 12, to execute the actions of the method 400.
  • the processor 1202 the memory 1204, the beam module 1208, the transceiver 1210, the modem 1212, and the one or more antennas 1216 shown in FIG. 12, to execute the actions of the method 400.
  • the BS 105 may repeat the SSB transmissions at a certain time interval (e.g., periodically) in the set of beam directions to allow the UE 115 to perform initial network access.
  • each beam and its corresponding characteristics may be identified by a beam index.
  • each SSB may include an indication of a beam index corresponding to the beam used for the SSB transmission.
  • the UE 115 may determine signal measurements, such as reference signal received power (RSRP) and/or reference signal received quality (RSRQ) , for the SSBs at the different beam directions.
  • the UE 115 may also sweep across a set of reception beams (e.g., the beams 330) when monitoring for SSBs from the BS 105.
  • the UE 115 may report the receive signal measurements to the BS, for example, in the form of a sorted list of signal measurements from a highest received signal power to a lowest received signal power or vice versa. In some other examples, the UE 115 may report received signal measurements for DL beams that exceeds a certain threshold. In yet some other examples, the UE 115 may report received signal measurements for N best DL beams (with the higher receive signal measurement among all the DL beams) . The BS 105 and/or the UE 115 may select an optimal transmission beam of the BS 105 for subsequent communications.
  • the beam refinement may also include refining a reception beam selection at the UE 115 similar to the P3 procedure described above.
  • beam refinement (P2 and/or P3) may be performed on-demand and may rely on aperiodic CSI-RSs. For instance, upon beam degradation (e.g., beam quality metrics falling below a threshold) , one or more of P2 or P3 may be used to select new or better transmission and/or reception beams.
  • example 500 may include a network node 110 (e.g., one or more network node devices such as an RU, a DU, and/or a CU, among other examples) and a UE 120 communicating to perform beam management using CSI-RSs.
  • Example 500 depicts a first beam management procedure (e.g., P1 beam management) .
  • the first beam management procedure may be referred to as a beam selection procedure, an initial beam acquisition procedure, a beam sweeping procedure, a cell search procedure, and/or a beam search procedure.
  • CSI-RSs may be configured to be transmitted from the network node 110 to the UE 120.
  • the CSI-RSs may be configured to be periodic (e.g., using RRC signaling) , semi-persistent (e.g., using media access control (MAC) control element (MAC-CE) signaling) , and/or aperiodic (e.g., using DCI) .
  • periodic e.g., using RRC signaling
  • semi-persistent e.g., using media access control (MAC) control element (MAC-CE) signaling
  • MAC-CE media access control element
  • aperiodic e.g., using DCI
  • the first beam management procedure may include the network node 110 performing beam sweeping over multiple Tx beams.
  • the network node 110 may transmit a CSI-RS using each transmit beam for beam management.
  • the network node may use a transmit beam to transmit (e.g., with repetitions) each CSI-RS at multiple times within the same RS resource set so that the UE 120 can sweep through receive beams in multiple transmission instances. For example, if the network node 110 has a set of N transmit beams and the UE 120 has a set of M receive beams, the CSI-RS may be transmitted on each of the N transmit beams M times so that the UE 120 may receive M instances of the CSI-RS per transmit beam.
  • the UE 120 may perform beam sweeping through the receive beams of the UE 120.
  • the first beam management procedure may enable the UE 120 to measure a CSI-RS on different transmit beams using different receive beams to support selection of network node 110 transmit beams/UE 120 receive beam (s) beam pair (s) .
  • the UE 120 may report the measurements to the network node 110 to enable the network node 110 to select one or more beam pair (s) for communication between the network node 110 and the UE 120.
  • example 500 has been described in connection with CSI-RSs, the first beam management process may also use SSBs for beam management in a similar manner as described above.
  • the second beam management procedure may include the network node 110 performing beam sweeping over one or more transmit beams.
  • the one or more transmit beams may be a subset of all transmit beams associated with the network node 110 (e.g., determined based at least in part on measurements reported by the UE 120 in connection with the first beam management procedure) .
  • the network node 110 may transmit a CSI-RS using each transmit beam of the one or more transmit beams for beam management.
  • the UE 120 may measure each CSI-RS using a single (e.g., a same) receive beam (e.g., determined based at least in part on measurements performed in connection with the first beam management procedure) .
  • the second beam management procedure may enable the network node 110 to select a best transmit beam based at least in part on measurements of the CSI-RSs (e.g., measured by the UE 120 using the single receive beam) reported by the UE 120.
  • example 520 depicts a third beam management procedure (e.g., P3 beam management) .
  • the third beam management procedure may be referred to as a beam refinement procedure, a UE beam refinement procedure, and/or a receive beam refinement procedure.
  • one or more CSI-RSs may be configured to be transmitted from the network node 110 to the UE 120.
  • the CSI-RSs may be configured to be aperiodic (e.g., using DCI) .
  • the third beam management process may include the network node 110 transmitting the one or more CSI-RSs using a single transmit beam (e.g., determined based at least in part on measurements reported by the UE 120 in connection with the first beam management procedure and/or the second beam management procedure) .
  • the network node may use a transmit beam to transmit (e.g., with repetitions) CSI-RS at multiple times within the same RS resource set so that UE 120 can sweep through one or more receive beams in multiple transmission instances.
  • the one or more receive beams may be a subset of all receive beams associated with the UE 120 (e.g., determined based at least in part on measurements performed in connection with the first beam management procedure and/or the second beam management procedure) .
  • the third beam management procedure may enable the network node 110 and/or the UE 120 to select a best receive beam based at least in part on reported measurements received from the UE 120 (e.g., of the CSI-RS of the transmit beam using the one or more receive beams) .
  • the beam management procedures described above involve the UE transmitting beam reports in response to detected changes in signal strength or quality (e.g., RSRP, RSRQ, etc. ) .
  • signal strength or quality e.g., RSRP, RSRQ, etc.
  • frequent beam reports can increase network overhead and reduce the time and frequency resources that may be used for other purposes. Frequent beam reporting may also increase power consumption at the reporting device and increase latency in communications.
  • a UE may detect changes in RSRP that are not likely to require beam management updates. For instance, the UE may move toward, or away from, the network node (e.g., gNB, TRP) . This may involve a change in the strength of the serving beam, but may not result in the serving beam being less suitable or less optimal for communications than the other available beams. In some instances, even if the UE moves tangentially with respect to the network node, the overall ranking of the beams may not have changed. Accordingly, the beam reports transmitted by the UE in these circumstances may not
  • a beam report skipping indication may be associated with a single BRC in a single CC, or with multiple BRCs in one or more CCs.
  • FIGS. 6A and 6B illustrate beam reporting schemes 600, 650 in which one or more beam reporting occasions 602 corresponding to one or more BRCs are skipped.
  • the schemes 600, 650 may be performed by a beam reporting device, such as a UE, an IoT device, or any other suitable device configured to perform beam management procedures and transmit beam reports.
  • the schemes 600, 650 will be described as being performed by a UE, however it will be understood that any suitable wireless communication device configured to perform beam reporting and beam management may perform the schemes 600, 650.
  • each of the individual boxes 606 may correspond to a slot, a symbol, a subframe, and/or any other suitable timing parameter.
  • the periodicity 1 is four boxes 606, which may correspond to four slots, four symbols, or four of any other suitable timing parameter.
  • Some of the beam reporting occasions 602 are skipped, and referred to ask “skipped BR occasions” 604.
  • the UE may transmit, in a first BR occasion 608, a beam report skipping indication indicating that one or more beam reporting occasions 602 will be skipped.
  • the beam report skipping indication may be associated with the BRC ID1 and the CC1 in the scheme 600. In some aspects, the beam report skipping indication may further indicate a number of beam reporting occasions to be skipped.
  • periodicity 2 and periodicity 3 are the same in terms of the time-domain spacing of the BR occasions 602 in number of slots, but may differ in relative offset, such that each corresponding BR occasion of BRC ID2 is offset from each BR occasion of BRC ID3 by at least one box 606 (e.g., one slot, one symbol) .
  • the beam report skipping indication may indicate a length of a beam report skipping period (e.g., in number of slots, in number of symbols, in number of beam reporting occasions, etc. ) .
  • the beam report skipping indication may also indicate a timing offset (e.g., in number of slots, in number of symbols, in number of beam reporting occasions, etc. ) from the beam report skipping indication to the beginning of the beam report skipping period.
  • a second beam report indication may be transmitted in a second BR occasion 614.
  • the second beam report skipping indication may indicate that the following two BR occasions 602 will be skipped in CC1 for BRC ID1, a single BR occasion for BRC ID2, and a single BR occasion for BRC ID3 in CC2.
  • the indicated value may also correspond to a CC index or value, such as CC1 and/or CC2.
  • the indicated value may also correspond to a periodicity for the BRC, such as periodicity 1, periodicity 2, and/or periodicity 3.
  • the index in the beam report skipping indication transmitted in the beam reporting occasion 614 may be associated with a row or entry in the RRC-configured table that indicates BRC ID1 in CC1, BRC ID2 in CC1, and BRC ID3 in CC2.
  • the beam report skipping indications may specify or indicate the beam report occasions to be skipped by indicating one or more of a length of time or a time offset associated with the skipped beam reporting occasions.
  • the indicated length of time and/or time offset may be indicated as a number of slots, a number of symbols, a number of beam reporting occasions, and/or any other suitable mechanism for time indication.
  • FIGS. 7A-7D illustrate various schemes or mechanisms for indicating or specifying one or more beam reporting occasions to be skipped with one or more beam report skipping indications.
  • the UE transmits a UCI 702 in a first BR occasion, with the UCI carrying, including, or otherwise indicating a first beam report skipping indication.
  • the beam report skipping indication indicates the timing parameters for a skipped BR occasion in terms of slots. Accordingly, the beam report skipping indication indicates that the period of time associated with the skipped BR occasion is offset from the UCI slot by three slots, and has a length of one slot.
  • the UE skips the BR occasion that begins three full slots after the UCI slot, and is within the one slot length.
  • the UE transmits a second UCI 704 carrying, including, or otherwise indicating a second beam report skipping occasion.
  • the beam report skipping indication may indicate a timing offset and/or a length that applies across multiple BRCs and/or across multiple CCs. For instance, the beam report skipping indication may indicate that any beam reporting occasions for any BRC and/or CC that fall within the indicated timing parameters are to be skipped.
  • an offset of one BR occasion refers to the BR occasion that immediately follows the BR occasion in which the UCI 714 is transmitted.
  • a timing offset of one BR occasion may indicate a time period that begins after one full BR occasion that follows the BR occasion in which the UCI 714 is transmitted.
  • the scheme 710 may be performed in conjunction with either of the schemes 600, 650 shown in FIGS. 6A and 6B.
  • the UE may dynamically indicate the timing offset associated with the skipped beam reporting occasions.
  • the UE may indicate one or more timing parameters of the skipped BR occasions based on configured or fixed timing parameters.
  • the UE may be configured by RRC with a timing offset for the skipped BR occasions.
  • the UE may be configured with a fixed timing offset for the skipped BR occasions.
  • the UE may be configured (e.g., RRC or fixed configuration) with a length of time associated with the skipped BR occasions.
  • the UE transmits a first UCI 722 including a first beam report skipping indication.
  • the first beam report skipping indication indicates a length of two slots.
  • the UE is configured with a timing offset of two slots.
  • the beam report skipping period begins after the configured period of two slots and lasts for the length of two slots, as indicated in the first UCI 722.
  • the beam report skipping period with the configured or fixed offset covers one BR occasion to be skipped.
  • a second UCI 724 is transmitted carrying a second beam report skipping indication.
  • the second beam report skipping indication indicates a length of six slots.
  • the beam report skipping period begins after the configured period of two slots following the slot of the second UCI 724, and lasts for six slots. This beam report skipping period covers the two BR occasions that follow the second UCI 724.
  • the UE transmits a second beam report skipping indication in a second UCI 734, with the second beam report skipping indication indicating a length of two BR occasions.
  • the UE skips the two BR occasions that begin after the configured offset of two slots.
  • the UE may be configured with an offset in numbers of BR occasions.
  • the schemes 700, 710, 720, and 730 may be performed by indicating the timing offset and/or length as a number of symbols, a number of subframes, a number of mini-slots, and/or any other suitable unit of time.
  • a reporting device may be configured to transmit beam report skipping indications less frequently than the periodicity of the corresponding BRC. For instance, if the UE is configured with a BRC having a beam reporting occasion periodicity of N slots, the UE may be configured to transmit beam report skipping indications with a periodicity of 2N slots, 3N slots, 4N slots, or any other suitable periodicity. In some aspects, reducing the periodicity of beam report skipping indications may reduce network overhead caused by the beam report skipping indications.
  • the UE may be configured with multiple sets of resources, where some are suitable for or configured for communicating beam reports only, some are suitable for or configured for communicating beam report skipping indications only, and some are suitable for or configured for communicating either beam reports, beam report skipping indications, or both.
  • FIGS. 8A and 8B illustrate schemes for beam report skipping indications in which a UE is configured to transmit beam report skipping indications with a periodicity that is different from the periodicity of the beam reporting occasions.
  • a UE is configured with a BRC associated with a plurality of BR occasions.
  • the BR occasions may be associated with or based on a periodicity of N slots, or N symbols, for example.
  • the UE is configured to transmit a beam report skipping indication every two BR occasions.
  • every other BR occasion is configured for communicating beam report skipping indications, as shown by the darkened pattern.
  • the BRC is associated with a beam report periodicity 802.
  • the beam report skipping indications may be transmitted with a beam report skipping periodicity 804 that is twice the periodicity 802.
  • the periodicity 804 may be three times, four times, five times, or any other suitable multiple of the periodicity 802.
  • FIG. 9 is a sequence diagram illustrating a communication method 900 that utilizes spatial-division multiplexed beams according to some aspects of the present disclosure.
  • the method 900 may be performed by wireless networks, such as the networks 100 and/or 300 communicating over a high-frequency band, such as a mmWave band or a sub-THz band.
  • the method 900 is performed by a BS 105 and a UE 115.
  • the BS 105 may utilize TRPs (e.g., the TRPs 305) to communicate with the UE 115.
  • TRPs e.g., the TRPs 305
  • the method 900 is discussed from the perspective of a single TRP co-located with the BS 105 or at a remote location from the BS 105.
  • the method 900 may employ similar mechanisms as discussed above with reference to FIGS. 4-8B.
  • the method 900 may be implemented after the BS 105 and the UE 115 establish a communication with each other.
  • the UE 115 may be in a connected mode (e.g., an RRC connected state) .
  • the BS 105 may utilize one or more components, such as the processor 1002, the memory 1004, the beam module 1008, the transceiver 1010, the modem 1012, and the one or more antennas 1016 shown in FIG. 10, to execute the actions of the method 900.
  • the UE 115 may utilize one or more components, such as the processor 1102, the memory 1104, the beam module 1108, the transceiver 1110, the modem 1112, and the one or more antennas 1116 shown in FIG. 11, to execute the actions of the method 900.
  • the method 900 includes a number of enumerated action, but embodiments of the method 900 may include additional actions before, after, and in between the enumerated actions. In some aspects, one or more of the enumerated actions may be omitted or performed in a different order.
  • the arrows grouped by a dashed oval represent simultaneous transmissions.
  • the BS 105 configures the UE 115 with one or more beam report configurations (BRCs) .
  • the BRCs are associated with a configuration for beam refinement.
  • the configuration may indicate a plurality of resources (e.g., the CSI-RS resources) associated with a set of beam directions for beam sweeping. Each resource may be associated with one beam direction in the set of beam direction.
  • the configuration can be a UE-specific configuration configured specifically for the UE 115.
  • the one or more BRCs may include, or may be associated with, a set of resources for beam reports from the UE 115.
  • a BRC may comprise a plurality of periodic beam reporting (BR) occasions in one or more CCs.
  • BR periodic beam reporting
  • the UE is configured with a plurality of BRCs in one or more CCs, as shown in FIG. 6B, for example.
  • action 910 comprises the BS 105 configuring the UE 115 with a set of resources for beam report skipping indications in addition to beam reporting, as explained with respect to FIG. 8B, for instance.
  • action 910 may comprise the BS 105 configuring the UE 115 with a configured timing offset for beam report skipping periods.
  • the BS 105 may configure the UE 115 with one or more RRC tables, where each entry or row in the RRC table is associated with an index. Each entry or row, as indicated by the index, may correspond to one or more BRCs in one or more CCs. For instance, the UE may indicate that one or more BR occasions will be skipped by indicating one of the entries or rows in the RRC-configured table.
  • the BS 105 may transmit a plurality of reference signals (e.g., CSI-RSs) by sweeping through the set of beam directions.
  • the BS 105 transmits a first reference signal of the plurality of reference signals in a first beam direction of a set of beam directions.
  • action 920 comprises the BS 105 transmitting a CSI-RS.
  • action 920 comprises the BS 105 transmitting a SSB.
  • the BS 105 may transmit any suitable type of RS for beam management.
  • the BS 105 may continue through a beam sweep by transmitting N RSs to the UE 115 successively in N different beam directions, as shown in action 930.
  • the UE 115 performs beam measurements for the plurality of directional RSs transmitted at steps 920-930.
  • action 930 comprises the UE 115 performing RSRP measurements.
  • action 930 comprises the UE 115 performing RSRQ measurements, SNR measurements, and/or any other suitable type of measurement for beam management or refinement.
  • the UE 115 may record the measurements such that they are associated with the corresponding beam direction.
  • a change in beam measurements may trigger the UE 115 to perform a beam management procedure that includes transmitting a beam report to the network via the BS 105.
  • the UE 115 may communicate with the BS 105 via a serving beam direction. If the RSRP of the serving beam changes by a given amount, the UE 115 may be configured to transmit a beam report to the network.
  • the change in RSRP of the serving beam may not indicate that a different beam or beam direction would be preferrable or better than the current serving beam.
  • the UE 115 may be moving toward or away from the BS 105. Accordingly, it may be desirable or beneficial for the UE 115 to skip one or more beam reporting occasions. By skipping the beam reporting, the UE 115 may conserve power and make more efficient use of network resources.
  • action 950 the UE 115 determines to skip one or more BR occasions.
  • action 950 comprises the UE 115 determining not to report or not to trigger a beam report based on one or more of a multi-beam metric, a ranking metric, or a combination thereof.
  • the UE 115 may compare a first beam measurement (e.g., RSRP) associated with a serving beam direction to at least a second beam measurement associated with at least a second beam direction. If the first beam measurement is better than the at least the second beam measurement, the UE may determine not to trigger a beam report.
  • RSRP first beam measurement
  • the UE 115 may determine not to trigger a beam report, and instead to transmit a beam report skipping indication.
  • the UE 115 may determine whether to trigger a beam report base don a ranking metric. For example, based on the beam measurements obtained at action 940, the UE 115 may determine an updated ranking for each of the plurality of beam directions. In some aspects, if the ranking of the beams remains unchanged, the UE 115 determines not to trigger a beam report. In another aspect, if the serving beam remains the top ranked beam, although there are other changes in the ranking, the UE 115 may determine not to trigger a beam report. In other aspects, the UE 115 may determine to trigger a beam report if there are any changes in the beam ranking since the last reporting.
  • the UE 115 transmits one or more beam report skipping indications to the BS 105.
  • the beam report skipping indication may apply to a single BRC in a single CC.
  • the beam report skipping indication may apply to a plurality of BRCs in one or more CCs.
  • the beam report skipping indication may implicitly indicate one or more beam reporting occasions to be skipped.
  • the beam report skipping indication may indicate timing parameters associated with the one or more BR occasions to be skipped. For instance, as explained above with respect to FIGS. 6A-8B, the beam report skipping indication may indicate one or more of a length or a timing offset in slots, symbols, and/or BR occasions.
  • the beam report skipping indication may indicate an index or value of a configured table associated with one or more BRCs, one or more CCs, one or more lengths of a beam report skipping period, one or more timing offsets for a beam report skipping period, a periodicity, and/or any other suitable set of parameters. Accordingly, the beam report skipping indication may incorporate any of the aspects explained above with respect to FIGS. 6A-8B.
  • FIG. 10 is a block diagram of an exemplary BS 1000 according to some aspects of the present disclosure.
  • the BS 1000 may be a BS 105 in the network 100 as discussed above in FIG. 1.
  • the BS 1000 may be a TRP 305 in the network 300 as discussed above in FIG. 3.
  • a TRP may implement at least RF functionalities, but may also implement some baseband processing and/or protocol stack layer processing similar to a BS.
  • the BS 1000 may include a processor 1002, a memory 1004, a beam module 1008, a transceiver 1010 including a modem subsystem 1012 and a RF unit 1014, and one or more antennas 1016.
  • These elements may be coupled with one another.
  • the term “coupled” may refer to directly or indirectly coupled or connected to one or more intervening elements. For instance, these elements may be in direct or indirect communication with each other, for example via one or more buses.
  • the processor 1002 may have various features as a specific-type processor. For example, these may include a CPU, a DSP, an ASIC, a controller, a FPGA device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.
  • the processor 1002 may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • the memory 1004 may include a cache memory (e.g., a cache memory of the processor 1002) , RAM, MRAM, ROM, PROM, EPROM, EEPROM, flash memory, a solid state memory device, one or more hard disk drives, memristor-based arrays, other forms of volatile and non-volatile memory, or a combination of different types of memory.
  • the memory 1004 may include a non-transitory computer-readable medium.
  • the memory 1004 may store instructions 1006.
  • the instructions 1006 may include instructions that, when executed by the processor 1002, cause the processor 1002 to perform operations described herein, for example, aspects of FIGS. 1-10. Instructions 1006 may also be referred to as program code.
  • the program code may be for causing a wireless communication device to perform these operations, for example by causing one or more processors (such as processor 1002) to control or command the wireless communication device to do so.
  • processors such as processor 1002
  • the terms “instructions” and “code” should be interpreted broadly to include any type of computer-readable statement (s) .
  • the terms “instructions” and “code” may refer to one or more programs, routines, sub-routines, functions, procedures, etc.
  • “Instructions” and “code” may include a single computer-readable statement or many computer-readable statements.
  • the beam module 1008 may be implemented via hardware, software, or combinations thereof.
  • the beam module 1008 may be implemented as a processor, circuit, and/or instructions 1006 stored in the memory 1004 and executed by the processor 1002.
  • the beam module 1008 can be integrated within the modem subsystem 1012.
  • the beam module 1008 can be implemented by a combination of software components (e.g., executed by a DSP or a general processor) and hardware components (e.g., logic gates and circuitry) within the modem subsystem 1012.
  • the beam module 1008 may communicate with various components of the BS 1000 to perform various aspects of the present disclosure, for example, aspects of FIGS. 1-9.
  • the beam module 1008 is configured to transmit a plurality of reference signals in a set of beam directions to a UE (e.g., the UEs 115 and/or 1100) .
  • the reference signals may comprise CSI-RSs, SSBs, and/or any other suitable type of RS for beam management.
  • the beam module 1008 is further configured to transmit the plurality of reference signals by transmitting, simultaneously during a first symbol, at least a first reference signal of the plurality of reference signals in a first beam direction of the set of beam directions and a second reference signal of the plurality of reference signals in a second beam direction of the set of beam directions, where the second beam direction is different from the first beam direction.
  • the BS 1000 is communicatively coupled a first TRP and a second TRP, and the beam module 1008 is configured to transmit the first reference signal via the first TRP and transmit the second reference signal via the second TRP.
  • the beam module 1008 is further configured receive a report indicating received signal measurements (e.g., L1-RSRPs) for two or more beam directions of the set of beam directions from the UE.
  • the beam module 1008 is configured to transmit, to the UE, one or more BRCs for beam reporting.
  • the one or more BRCs may be associated with one or more CCs.
  • the beam module 1008 is configured to transmit one or more RRC configurations for beam report skipping indications.
  • the beam module 1008 may transmit, or output for transmission, one or more configurations for the UE to use in beam report skipping indications.
  • the configurations may include a table of BRCs and associated CCs, for example.
  • the one or more configurations may include or indicate one or more configured timing offset or beam report skipping length values.
  • the beam module 1008 is configured to receive one or more beam reports from one or more UEs based on a reference signal beam sweep. In another aspect, the beam module 1008 is configured to receive one or more beam report skipping indications from the UE.
  • the transceiver 1010 may include the modem subsystem 1012 and the RF unit 1014.
  • the transceiver 1010 can be configured to communicate bi-directionally with other devices, such as the UEs 115 and/or another core network element.
  • the modem subsystem 1012 may be configured to modulate and/or encode data according to a MCS, e.g., a LDPC coding scheme, a turbo coding scheme, a convolutional coding scheme, a digital beamforming scheme, etc.
  • the RF unit 1014 may be configured to process (e.g., perform analog to digital conversion or digital to analog conversion, etc.
  • modulated/encoded data e.g., RRC configuration, CSI-RS resource configuration, CSI-RS report configuration, CSI-RSs, SSB beams
  • modulated/encoded data e.g., RRC configuration, CSI-RS resource configuration, CSI-RS report configuration, CSI-RSs, SSB beams
  • the RF unit 1014 may be further configured to perform analog beamforming in conjunction with the digital beamforming.
  • the modem subsystem 1012 and/or the RF unit 1014 may be separate devices that are coupled together at the BS 105 to enable the BS 105 to communicate with other devices.
  • the RF unit 1014 may provide the modulated and/or processed data, e.g. data packets (or, more generally, data messages that may contain one or more data packets and other information) , to the antennas 1016 for transmission to one or more other devices.
  • the antennas 1016 may further receive data messages transmitted from other devices and provide the received data messages for processing and/or demodulation at the transceiver 1010.
  • the transceiver 1010 may provide the demodulated and decoded data (e.g., UE capability report, beam reports) to the beam module 1008 for processing.
  • the antennas 1016 may include multiple antennas of similar or different designs in order to sustain multiple transmission links.
  • the antennas 1016 may in the form of one or more antenna panels or one or more antenna arrays each including a plurality of antenna element that can be selectively configured with different gains and/or phases to generate a beam for transmission and/or reception.
  • the transceiver 1010 is coupled to components of the BS 1000 and configured to transmit, to a UE, a plurality of reference signals in a set of beam directions (e.g., using transmission beams 310, 320, 620, 720, and/or 722) .
  • the transmitting the plurality of reference signals includes transmitting, simultaneously during a first symbol, at least a first reference signal of the plurality of reference signals in a first beam direction of the set of beam directions and a second reference signal of the plurality of reference signals in a second beam direction of the set of beam directions, where the second beam direction is different from the first beam direction.
  • the transceiver 1010 is further configured to receive, from the UE, a report indicating received signal measurements (e.g., L1-RSRPs) for two or more beam directions of the set of beam direction.
  • the BS 1000 can include multiple transceivers 1010 implementing different RATs (e.g., NR and LTE) .
  • the BS 1000 can include a single transceiver 1010 implementing multiple RATs (e.g., NR and LTE) .
  • the transceiver 1010 can include various components, where different combinations of components can implement different RATs.
  • FIG. 11 is a block diagram of an exemplary UE 1100 according to some aspects of the present disclosure.
  • the UE 1100 may be a UE 115 as discussed above with respect to FIGS. 1 and 3.
  • the UE 1100 may include a processor 1102, a memory 1104, a beam module 1108, a transceiver 1110 including a modem subsystem 1112 and a radio frequency (RF) unit 1114, and one or more antennas 1116.
  • RF radio frequency
  • the processor 1102 may include a central processing unit (CPU) , a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a controller, a field programmable gate array (FPGA) device, another hardware device, a firmware device, or any combination thereof configured to perform the operations described herein.
  • the processor 1102 may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • the memory 1104 may include a cache memory (e.g., a cache memory of the processor 1102) , random access memory (RAM) , magnetoresistive RAM (MRAM) , read-only memory (ROM) , programmable read-only memory (PROM) , erasable programmable read only memory (EPROM) , electrically erasable programmable read only memory (EEPROM) , flash memory, solid state memory device, hard disk drives, other forms of volatile and non-volatile memory, or a combination of different types of memory.
  • the memory 1104 includes a non-transitory computer-readable medium.
  • the memory 1104 may store, or have recorded thereon, instructions 1106.
  • the instructions 1106 may include instructions that, when executed by the processor 1102, cause the processor 1102 to perform the operations described herein with reference to the UEs 115 in connection with aspects of the present disclosure, for example, aspects of FIGS. 2-9. Instructions 1106 may also be referred to as program code, which may be interpreted broadly to include any type of computer-readable statement (s) as discussed above with respect to FIG. 10.
  • the beam module 1108 may be implemented via hardware, software, or combinations thereof.
  • the beam module 1108 may be implemented as a processor, circuit, and/or instructions 1106 stored in the memory 1104 and executed by the processor 1102.
  • the beam module 1108 can be integrated within the modem subsystem 1112.
  • the beam module 1108 can be implemented by a combination of software components (e.g., executed by a DSP or a general processor) and hardware components (e.g., logic gates and circuitry) within the modem subsystem 1112.
  • the beam module 1108 may communicate with various components of the UE 1100 to perform aspects of the present disclosure, for example, aspects of FIGS. 2-9.
  • the beam module 1108 is configured to receive a plurality of reference signals (e.g., CSI-RSs, SSBs, etc. ) in a set of beam directions from a BS (e.g., the BSs 105, 105, and/or 1000 and/or TRPs 305) .
  • the beam module 1108 is further configured to perform a plurality of RS measurements associated with each of the beam directions.
  • the RS measurements comprise RSRP measurements.
  • the RS measurements comprise RSRQ, SNR, and/or any other suitable type of RS measurement.
  • the beam module 1108 is configured to transmit, based on the plurality of RS measurements, a first beam report skipping indication.
  • the beam report skipping indication indicates one or more beam reporting occasions for which the UE will refrain from transmitting one or more beam reports.
  • the first beam report skipping indication indicates the timing parameters or resources associated with the one or more beam reporting occasions to be skipped.
  • the first beam report skipping indication indicates a length and/or a timing offset associated with the one or more skipped beam reporting occasions.
  • the first beam report skipping indication indicates the one or more BRCs and/or CCs associated with the one or more skipped beam reporting occasions. It will be understood that the first beam report skipping indication may indicate any of the parameters described above with respect to FIGS. 6A-9.
  • the transceiver 1110 may include the modem subsystem 1112 and the RF unit 1114.
  • the transceiver 1110 can be configured to communicate bi-directionally with other devices, such as the BSs 105.
  • the modem subsystem 1112 may be configured to modulate and/or encode the data from the memory 1104 and/or the beam module 1108 according to a modulation and coding scheme (MCS) , e.g., a low-density parity check (LDPC) coding scheme, a turbo coding scheme, a convolutional coding scheme, a digital beamforming scheme, etc.
  • MCS modulation and coding scheme
  • LDPC low-density parity check
  • the RF unit 1114 may be configured to process (e.g., perform analog to digital conversion or digital to analog conversion, etc.
  • modulated/encoded data e.g., UE capability report, beam reports
  • modulated/encoded data e.g., UE capability report, beam reports
  • the RF unit 1114 may be further configured to perform analog beamforming in conjunction with the digital beamforming.
  • the modem subsystem 1112 and the RF unit 1114 may be separate devices that are coupled together at the UE 115 to enable the UE 115 to communicate with other devices.
  • the RF unit 1114 may provide the modulated and/or processed data, e.g. data packets (or, more generally, data messages that may include one or more data packets and other information) , to the antennas 1116 for transmission to one or more other devices.
  • the antennas 1116 may further receive data messages transmitted from other devices.
  • the antennas 1116 may provide the received data messages for processing and/or demodulation at the transceiver 1110.
  • the transceiver 1110 may provide the demodulated and decoded data (e.g., RRC configuration, CSI-RS resource configuration, CSI-RS report configuration, CSI-RSs, SSB beams) to the beam module 1108 for processing.
  • the antennas 1116 may include multiple antennas of similar or different designs in order to sustain multiple transmission links.
  • the RF unit 1114 may configure the antennas 1116.
  • the antennas 1116 may in the form of one or more antenna panels or one or more antenna arrays each including a plurality of antenna element that can be selectively configured with different gains and/or phases to generate a beam for transmission and/or reception.
  • the transceiver 1110 is coupled to components of the UE 1100 and configured to receive, from a BS, a plurality of reference signals in a set of beam directions (e.g., using transmission beams 310, 320, 620, 720, and/or 722) .
  • the receiving the plurality of reference signals includes transmitting, simultaneously during a first symbol, at least a first reference signal of the plurality of reference signals in a first beam direction of the set of beam directions and a second reference signal of the plurality of reference signals in a second beam direction of the set of beam directions, where the second beam direction is different from the first beam direction.
  • the transceiver 1110 is further configured to transmit, to the UE, a report indicating received signal measurements (e.g., L1-RSRPs) for two or more beam directions of the set of beam direction.
  • the UE 1100 can include multiple transceivers 1110 implementing different RATs (e.g., NR and LTE) .
  • the UE 1100 can include a single transceiver 1110 implementing multiple RATs (e.g., NR and LTE) .
  • the transceiver 1110 can include various components, where different combinations of components can implement different RATs.
  • FIG. 12 is a flow diagram of a wireless communication method 1200 according to some aspects of the present disclosure. Aspects of the method 1200 can be executed by a computing device (e.g., a processor, processing circuit, and/or other suitable component) of a wireless communication device or other suitable means for performing the steps.
  • a wireless communication device such as the UEs 115 and/or 1100 may utilize one or more components, such as the processor 1102, the memory 1104, the beam module 1208, the transceiver 1110, the modem 1112, and the one or more antennas 1116, to execute the steps of method 1200.
  • the method 1200 may employ similar mechanisms as described above in FIGS. 6A-9.
  • the method 1200 includes a number of enumerated steps, but aspects of the method 1200 may include additional steps before, after, and in between the enumerated steps. In some aspects, one or more of the enumerated steps may be omitted or performed in a different order.
  • a UE performs a plurality of reference signal measurements associated with a plurality of beam directions.
  • block 1210 includes the UE receiving a plurality of reference signals associated with the plurality of beam directions.
  • the reference signals comprise CSI-RSs.
  • the plurality of reference signals comprise SSBs.
  • any other suitable type of reference signal for beam management is also contemplated.
  • performing the plurality of reference signal measurements comprises determining a RSRP value for each of the plurality of beam directions based on the detected reference signals.
  • performing the plurality of reference signal measurements comprises determining a RSRP, SNR, and/or any other suitable type of signal measurement associated with the plurality of reference signals.
  • the UE transmits, based on the reference signal measurements, a first beam report skipping indication.
  • the first beam report skipping indication may indicate one or more beam reporting occasions for which the UE will refrain from transmitting one or more beam reports.
  • transmitting the first beam report indication comprises transmitting UCI in a beam reporting occasion based on a beam report configuration (BRC) .
  • BRC beam report configuration
  • the UCI indicates one or more of a length or a timing offset associated with a beam report skipping period.
  • the first beam report indication indicates one or more BRC IDs and/or one or more CC indices.
  • the first beam report skipping indication may indicate a single BRC in a single CC, or a plurality of BRCs in one or more CCs.
  • the first beam report skipping indication indicates one or more indices associated with a RRC configuration.
  • the one or more parameters associated with the beam report skipping period may be indicated by a number of slots, a number of symbols, a number of subframes, a number of mini-slots, a number of beam reporting occasions, and/or any other suitable time unit.
  • block 1220 comprises transmitting the first beam report skipping indication in a beam reporting occasion configured for communicating beam repots. In another aspect, block 1220 comprises transmitting the first beam report skipping indication in a beam report skipping indication resource configured for communicating beam report skipping indications but not for beam reports. In some aspects, block 1220 comprises transmitting the first beam report skipping indication in a resource configured for communicating either or both of beam reports and beam report skipping indications.
  • the method 1200 comprises the UE determining, based on the plurality of reference signal measurements, to refrain from transmitting the one or more beam reports based on a comparison reference signal measurements. For example, the UE may compare a first RSRP measurement associated with a serving beam direction to at least a second RSRP measurement associated with at least one other beam direction. In another aspect, determining to refrain from transmitting the one or more beam reports is based on a determination of a change in beam rank among the plurality of beam directions, as explained above.
  • a method of wireless communication by a user equipment (UE) comprising: performing a plurality of reference signal measurements associated with a plurality of beam directions; and transmitting, based on the reference signal measurements, a first beam report skipping indication, wherein the beam report skipping indication indicates one or more beam reporting occasions for which the UE will refrain from transmitting one or more beam reports.
  • Aspect 2 The method of aspect 1, wherein the performing the plurality of reference signal measurements comprising performing a plurality of reference signal received power (RSRP) measurements.
  • RSRP reference signal received power
  • Aspect 3 The method of aspect 2, wherein the performing the plurality of RSRP measurements comprises performing the plurality of RSRP measurements for one of: a plurality of channel state information reference signals (CSI-RSs) associated with the plurality of beam directions; or a plurality of synchronization signal blocks (SSBs) associated with the plurality of beam directions.
  • CSI-RSs channel state information reference signals
  • SSBs synchronization signal blocks
  • Aspect 4 The method of any of aspects 1-3, wherein the transmitting the beam report skipping indication comprises transmitting uplink control information (UCI) , wherein the beam report skipping indication indicates one or more beam report configurations associated with the one or more beam reporting occasions.
  • UCI uplink control information
  • Aspect 5 The method of aspect 4, wherein the beam report skipping indication indicates a single beam report configuration and a single component carrier associated with the one or more beam reporting occasions.
  • Aspect 6 The method of aspect 5, wherein the UCI indicates a plurality of beam report configuration identifiers associated with the plurality of beam report configurations.
  • Aspect 7 The method of aspect 5, wherein the UCI indicates an index associated with a radio resource control (RRC) configuration, wherein the index is associated with the single beam report configuration and a single component carrier (CC) .
  • RRC radio resource control
  • CC single component carrier
  • Aspect 8 The method of aspect 4, wherein the beam report skipping indication indicates a plurality of beam report configuration associated with the one or more beam reporting occasions.
  • Aspect 9 The method of aspect 8, wherein the plurality of beam report configurations are associated with a plurality of component carriers (CCs) .
  • CCs component carriers
  • Aspect 10 The method of aspect 8, wherein the plurality of beam report configurations are associated with a single component carrier (CC) .
  • CC component carrier
  • Aspect 11 The method of any of aspects 8-10, wherein the UCI indicates a plurality of beam report configuration identifiers associated with the plurality of beam report configurations.
  • Aspect 12 The method of any of aspects 8-11, wherein the UCI indicates an index associated with a radio resource control (RRC) configuration, wherein the index is associated with the plurality of beam report configurations.
  • RRC radio resource control
  • Aspect 13 The method of any of aspects 1-12, wherein the beam report skipping indication indicates one or more time resources associated with the one or more beam reporting occasions.
  • Aspect 14 The method of aspect 13, wherein the beam report skipping indication indicates a length of time during which the UE will refrain from transmitting the one or more beam reports.
  • Aspect 15 The method of aspect 14, wherein the beam report skipping indication further indicates a time offset preceding the length of time during which the UE will refrain from transmitting the one or more beam reports.
  • Aspect 16 The method of aspect 14, wherein the length of time follows a configured offset period.
  • Aspect 18 The method of aspect 16, wherein the configured offset period comprises a number of beam reporting occasions.
  • Aspect 19 The method of aspect 13, wherein the beam report skipping indication indicates the one or more time resources associated with the one or more beam reporting occasions in terms of at least one of a number of slots or a number of symbols.
  • Aspect 20 The method of aspect 13, wherein the beam report skipping indication indicates the one or more time resources associated with the one or more beam reporting occasions in terms of at least one of a number of beam reporting occasions or one or more beam reporting periodicities.
  • Aspect 21 The method of any of aspects 1-20, further comprising: receiving, from a network entity: a first beam report configuration associated with a first periodicity and a first time offset; and a second beam report configuration associated with a second periodicity and a second time offset, wherein the first beam report configuration is configured for receiving beam reports and beam report skipping indications, and wherein the second beam report configuration is configured for receiving beam reports and is not configured for receiving beam report skipping indications.
  • Aspect 22 The method of aspect 21, wherein the transmitting the first beam report skipping indication comprises transmitting the first beam report skipping indication in a first beam reporting occasion associated with the first beam report configuration.
  • Aspect 23 The method of any of aspects 21-22, further comprising: receiving, from the network entity, a beam report skipping configuration associated with a third periodicity and a third time offset, wherein the transmitting the first beam report skipping indication comprises transmitting the first beam report skipping indication in a first beam report skipping occasion associated with the beam report skipping configuration.
  • Aspect 24 The method of any of aspects 1-23, wherein: the plurality of reference signal measurements comprises a first reference signal measurement associated with a first beam direction and a second reference signal measurement associated with a second beam direction; the first beam direction is associated with a serving beam; and the transmitting the first beam report skipping indication is based on a comparison of the first reference signal measurement to the second reference signal measurement.
  • Aspect 25 The method of any of aspects 1-24, wherein the transmitting the first beam report skipping indication is based on a channel ranking of the plurality of beam directions, and wherein the channel ranking is based on the plurality of reference signal measurements.
  • a user equipment comprising: a memory device; a transceiver; and a processor in communication with the memory device and the transceiver, wherein the UE is configured to perform the actions of any of aspects 1-25.
  • Aspect 27 A non-transitory, computer-readable memory having program code recorded thereon, wherein the program code is executable by a processor of a user equipment (UE) to cause the UE to perform the actions of any of aspects 1-25.
  • UE user equipment
  • Aspect 28 A user equipment (UE) comprising means for performing the actions of any of aspects 1-25.
  • Information and signals may be represented using any of a variety of different technologies and techniques.
  • data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) .
  • the functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
  • “or” as used in a list of items indicates an inclusive list such that, for example, a list of [at least one of A, B, or C] means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) .

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

Abstract

Un procédé de communication sans fil par un équipement utilisateur (UE) consiste à : effectuer une pluralité de mesures de signal de référence associées à une pluralité de directions de faisceau ; et transmettre, sur la base des mesures de signal de référence, une première indication de saut de rapport de faisceau, l'indication de saut de rapport de faisceau indiquant une ou plusieurs occasions de rapport de faisceau pour lesquelles l'UE s'abstient de transmettre un ou plusieurs rapports de faisceau.
PCT/CN2023/100366 2023-06-15 2023-06-15 Gestion de faisceau avec indications de saut de rapport de faisceau Ceased WO2024254811A1 (fr)

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PCT/CN2023/100366 WO2024254811A1 (fr) 2023-06-15 2023-06-15 Gestion de faisceau avec indications de saut de rapport de faisceau

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200052753A1 (en) * 2018-08-09 2020-02-13 Qualcomm Incorporated Methods for full duplex beamforming and online calibration in millimeter wave systems
EP3826197A1 (fr) * 2018-07-20 2021-05-26 NTT DoCoMo, Inc. Terminal d'utilisateur et station de base
US20220007207A1 (en) * 2020-07-06 2022-01-06 Qualcomm Incorporated Beam switching and enhanced beam reporting to mitigate interference in beamforming
WO2023272710A1 (fr) * 2021-07-02 2023-01-05 Qualcomm Incorporated Techniques de transmission d'un rapport de faisceau de cellules hors desserte déclenché par un événement
WO2023050419A1 (fr) * 2021-09-30 2023-04-06 Nokia Shanghai Bell Co., Ltd. Saut de rapport de mesures de positionnement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3826197A1 (fr) * 2018-07-20 2021-05-26 NTT DoCoMo, Inc. Terminal d'utilisateur et station de base
US20200052753A1 (en) * 2018-08-09 2020-02-13 Qualcomm Incorporated Methods for full duplex beamforming and online calibration in millimeter wave systems
US20220007207A1 (en) * 2020-07-06 2022-01-06 Qualcomm Incorporated Beam switching and enhanced beam reporting to mitigate interference in beamforming
WO2023272710A1 (fr) * 2021-07-02 2023-01-05 Qualcomm Incorporated Techniques de transmission d'un rapport de faisceau de cellules hors desserte déclenché par un événement
WO2023050419A1 (fr) * 2021-09-30 2023-04-06 Nokia Shanghai Bell Co., Ltd. Saut de rapport de mesures de positionnement

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