WO2021143652A1 - Procédés et appareil destinés à la mesure et au rapport de faisceau basés sur un groupe - Google Patents

Procédés et appareil destinés à la mesure et au rapport de faisceau basés sur un groupe Download PDF

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Publication number
WO2021143652A1
WO2021143652A1 PCT/CN2021/071131 CN2021071131W WO2021143652A1 WO 2021143652 A1 WO2021143652 A1 WO 2021143652A1 CN 2021071131 W CN2021071131 W CN 2021071131W WO 2021143652 A1 WO2021143652 A1 WO 2021143652A1
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WIPO (PCT)
Prior art keywords
reference signal
terminal device
signal resources
resources
receive
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PCT/CN2021/071131
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English (en)
Inventor
Li Guo
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Guangdong Oppo Mobile Telecommunications Corp., Ltd.
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Application filed by Guangdong Oppo Mobile Telecommunications Corp., Ltd. filed Critical Guangdong Oppo Mobile Telecommunications Corp., Ltd.
Publication of WO2021143652A1 publication Critical patent/WO2021143652A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • 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

  • the present application relates to the field of communications, and more particularly to a method, terminal device, and network device for measuring and reporting on multiple beams.
  • An example communications system is the fifth generation (5G) New Radio (NR) system (5G/NR) .
  • 5G/NR fifth generation New Radio
  • power and interference based beam measurement are supported.
  • a terminal device e.g. a user equipment (UE)
  • UE user equipment
  • CSI-RS Channel State Information Reference Signal
  • SS/PBCH Synchronization Signal/Physical Broadcast Channel
  • L1-RSRP Layer 1 Reference Signal Received Power
  • the UE can select up to 4 CSI-RS resources or SS/PBCH blocks from those configured resources and then report the indicators of those selected CSI-RS resources or SS/PBCH blocks and corresponding L1-RSRP measurement results to a network device (e.g. a next generation Node Base (gNB) station) .
  • gNB next generation Node Base
  • the current beam measurement and reporting does not support multiple transmission-reception points (multi-TRP) transmission to a UE with multiple antenna panels or modules, due to the following reasons:
  • the gNB is not able to select two transmit beams from two different TRPs that can be used to transmit Physical Downlink Control Channel (PDCCH) or Physical Downlink Shared Channel (PDSCH) on overlapped symbols (simultaneously) based on the beam reporting.
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • the UE In group-based beam reporting, the UE might report two CSI-RS Resource Indicators (CRIs) or SS/PBCH Resource Block Indicators (SSBRIs) that represent two transmit beams from the same single TRP and thus the report has no value for multi-TRP transmission.
  • CRIs CSI-RS Resource Indicators
  • SSBRIs SS/PBCH Resource Block Indicators
  • Frequency Range 2 includes frequency bands from 24.25 GHz to 52.6 GHz.
  • the UE would use multiple Receive (Rx) antenna panels and use a different panel to receive PDCCH/PDSCH from different TRPs.
  • the current beam reporting methods cannot support UE Rx panel-specific beam measurement reports.
  • Embodiments provide a method, terminal device, and a network device for measuring and reporting on multiple beams that aim to overcome problems associated with conventional methods and apparatuses.
  • a method for beam measurement comprising: measuring a first set of reference signal resources contained within a first beam transmitted from a first network device and received by a first receiving unit of a terminal device; and measuring a second set of reference signal resources contained within a second beam transmitted from a second network device and received by a second receiving unit of the terminal device.
  • the first set of reference signal resources and the second set of reference signal resources may be received simultaneously.
  • the method may further include, generating, by a terminal device, a beam report comprising at least one pair of reference signal resource indicators;
  • each pair of reference signal resource indicators may be for a reference signal resource contained in the first set and a reference signal resource contained in the second set.
  • the beam report may further comprise measurement results of each reference signal resource.
  • the reference signal resources may be channel state information reference signal, CSI-RS, resources or synchronization signal/physical broadcast channel, SS/PBCH, blocks.
  • the reference signal resource indicators may be channel state information reference signal resource indicators, CRIs, or synchronization signal/physical broadcast channel block indicators, SSBRIs.
  • the measurement results may include layer 1 reference signal received power, L1-RSRP, measurement results or layer 1 signal to interference noise ratio, L1-SINR, measurement results.
  • the at least one pair of reference signal resource indicators may include K reference signal resource indicators for reference signal resources from the first set of reference signal resources and K reference signal resource indicators for reference signal resources from the second set of reference signal resources, wherein K is a positive integer, and the method may further comprise transmitting the beam report to at least one of the first and second network devices.
  • the method may further comprise setting the value of K by at least one of the first and second network devices, and transmitting, from the at least one of the first and second network devices, a reporting setting to the terminal device to configure the value of K.
  • the method may further comprise setting the value of K by a third network device connected to the first and second network devices, and transmitting, from at least one of the first and second network devices, a reporting setting to the terminal device to configure the value of K.
  • the method may further comprise transmitting, from the terminal device, a configuration report stating that the terminal device is able to receive the first beam comprising the first set of reference signal resources and the terminal device is able to simultaneously receive the second beam comprising the second set of reference signal resources to at least one of the first and second network devices.
  • the method may further comprise controlling, by at least one of the first and second network devices, the first network device to transmit the first beam comprising the first set of reference signal resources to the terminal device, and the second network device to transmit the second beam comprising the second set of reference signal resources to the terminal device.
  • the method may further comprise controlling, by a third network device connected to the first and second network devices, the first network device to transmit the first beam comprising the first set of reference signal resources to the terminal device, and the second network device to transmit the second beam comprising the second set of reference signal resources to the terminal device.
  • the method may further comprise transmitting the beam report to at least one of the first and second network devices using at least one spatial domain receive filter corresponding to the at least one of the first and second network devices.
  • the terminal device may use different spatial domain receive filters to receive the first and second beams comprising the first and second sets of reference signal resources simultaneously.
  • the at least one pair of reference signal resource indicators may include a first subset of K1 selected reference signal resource indicators for reference signal resources from the first set of reference signal resources and a second subset of K1 selected reference signal resource indicators for reference signal resources from the second set of reference signal resources, wherein K1 is a positive integer and is less than the total number of reference signal resources in the first or second set, and wherein the method may further comprise transmitting the beam report to at least one of the first and second network devices.
  • a terminal device comprising: a first receiving unit configured to receive a first beam comprising a first set of reference signal resources transmitted from a first network device; a second receiving unit configured to receive a second beam comprising a second set of reference signal resources transmitted from a second network device; and a processing unit configured to measure the first and second sets of reference signal resources.
  • the first and second sets of reference signal resources may be received simultaneously.
  • the processing unit may be configured to generate a beam report comprising at least one pair of reference signal resource indicators; and the terminal device may further comprise a transmitting unit configured to transmit the beam report, wherein each pair of reference signal resource indicators may be for a reference signal resource contained in the first set and a reference signal resource contained in the second set.
  • the beam report may further comprise measurement results of each reference signal resource.
  • the reference signal resources may be channel state information reference signal, CSI-RS, resources or synchronization signal/physical broadcast channel, SS/PBCH, blocks.
  • the reference signal resource indicators may be channel state information reference signal resource indicators, CRIs, or synchronization signal/physical broadcast channel block indicators, SSBRIs.
  • the measurement results may include layer 1 reference signal received power, L1-RSRP, measurement results or layer 1 signal to interference noise ratio, L1-SINR, measurement results.
  • the at least one pair of reference signal resource indicators may include K reference signal resource indicators for reference signal resources from the first set of reference signal resources and K reference signal resource indicators for reference signal resources from the second set of reference signal resources, wherein K is a positive integer, and wherein the terminal device may further comprise a transmitting unit configured to transmit the beam report to at least one of the first and second network devices.
  • the value of K may be set by receiving a reporting setting from at least one of the first and second network devices.
  • the processing unit may be configured to generate a configuration report stating that the first receiving unit is able to receive the first beam comprising the first set of reference signal resources and the second receiving unit is able to receive the second beam comprising the second set of reference signal resources, and the terminal device may further comprise a transmitting unit configured to transmit the configuration report to at least one of the first and second network devices.
  • the terminal device may further comprise a transmitting unit configured to transmit the beam report to at least one of the first and second network devices using at least one spatial domain receive filter corresponding to the at least one of the first and second network devices.
  • the terminal device may be configured to use different spatial domain receive filters to receive the first and second beams comprising the first and second sets of reference signal resources simultaneously.
  • the at least one pair of reference signal resource indicators may include a first subset of K1 selected reference signal resource indicators for reference signal resources from the first set of reference signal resources and a second subset of K1 selected reference signal resource indicators for reference signal resources from the second set of reference signal resources, wherein K1 is a positive integer and is less than the total number of reference signal resources in the first or second set, and wherein the terminal device may further comprise a transmitting unit configured to transmit the beam report to at least one of the first and second network devices.
  • a network device comprising: a communication unit configured to communicate with a terminal device, and a processing unit configured to control the communication unit to transmit information to configure a first receiving unit of the terminal device to receive a first beam comprising a first set of reference signal resources, to configure a second receiving unit of the terminal device to receive a second beam comprising a second set of reference signal resources, and to configure the terminal device to measure the first and second sets of reference signal resources.
  • a system comprising: a first network device configured to transmit a first beam comprising a first set of reference signal resources; a second network device configured to transmit a second beam comprising a second set of reference signal resources; and a terminal device comprising a first receiving unit configured to receive the first set of reference signal resources, a second receiving unit configured to receive the second set of reference signal resources, wherein the terminal device is configured to simultaneously receive the first and second sets of reference signal resources.
  • Figure 1 shows a schematic illustration of a system according to an embodiment
  • Figure 2 shows a schematic illustration of a terminal device according to an embodiment
  • Figure 3 shows a schematic illustration of a network device according to an embodiment
  • Figure 4 shows a flowchart of the operation of the terminal device according to an embodiment
  • Figure 5 shows a flowchart of the operation of the network device according to an embodiment
  • Figure 6 shows a flowchart of the operation of the system according to an embodiment.
  • GSM Global System Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • NR New Radio
  • the technical solutions may be applied to a variety of orthogonal and non-orthogonal multiple access technology-based communication systems.
  • a terminal device in the embodiments may refer to a user equipment (UE) , an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user apparatus.
  • UE user equipment
  • the access terminal may be a cellular phone, a cordless phone, an SIP (Session Initiation Protocol) phone, a WLL (Wireless Local Loop) station, a PDA (Personal Digital Assistant) , a handheld device having a wireless communication function, a computing device, or another processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network, or a terminal device in a future evolutional PLMN (Public Land Mobile Network) , and the like.
  • PLMN Public Land Mobile Network
  • a network device in the embodiments of the present application may be a device for communicating with the terminal device.
  • the network device may be a Base Transceiver Station (BTS) in a GSM system or a CDMA system, a NodeB (NB) in a WCDMA system, an Evolutional NodeB (eNB or eNodeB) in an LTE system, a wireless controller, or a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in 5G network (for example, gNB) , or a network device in a future evolutional Public Land Mobile Network (PLMN) , etc.
  • the network device may be a transmission-reception point (TRP) of a base station (for example, a gNB) .
  • TRP transmission-reception point
  • a base station for example, a gNB
  • the embodiments of the present application are not limited thereto.
  • a transmission point is a set of geographically co-located transmit antennas (e.g. antenna array (with one or more antenna elements) ) for one cell or part of one cell.
  • Transmission Points can include base station (ng-eNB or gNB) antennas, remote radio heads, a remote antenna of a base station, etc.
  • One cell can include one or multiple transmission points. For a homogeneous deployment, each transmission point may correspond to one cell.
  • a reception point is a set of geographically co-located receive antennas (e.g. antenna array (with one or more antenna elements) ) for one cell or part of one cell.
  • Reception Points can include base station (ng-eNB or gNB) antennas, remote radio heads, a remote antenna of a base station, and so on.
  • One cell can include one or multiple reception points. For a homogeneous deployment, each reception point may correspond to one cell.
  • a transmission-reception point is a set of geographically co-located antennas (e.g. antenna array (with one or more antenna elements) ) supporting TP and/or RP functionality.
  • a wireless communication network includes one or more fixed base infrastructure units forming a network distributed over a geographical region.
  • the network device may serve a number of terminal devices within a serving area, for example, a cell, or within a cell sector.
  • one or more network devices are coupled to a controller (such as a wireless controller) forming an access network that is coupled to one or more core networks.
  • Base stations gNBs are examples of network devices in the wireless network, the serving area of which may or may not overlap with each other.
  • a communication system in general may include a terminal device and a network device.
  • the network device is configured to provide communication service for the terminal device and access to a core network.
  • the terminal device accesses the network by searching a synchronous signal, broadcast signal and the like transmitted by the network device, thereby communicating with the network.
  • Figure 1 shows a schematic illustration of a communication system 10 according to an embodiment.
  • the system 10 comprises a terminal device 100, a first network device 200a and a second network device 200b.
  • Each of the first and second network devices 200a, 200b comprises a transmission-reception point (TRP) .
  • the first and second network devices 200a, 200b may each be a base station (gNB) or a TRP of a gNB.
  • the terminal device 100 is in communication with the first network device 200a and the second network device 200b.
  • the first and second network devices 200a, 200b may each be connected to a third network device 200c.
  • the third network device 200c may be a wireless controller.
  • the first and second network devices 200a, 200b may be connected to one another to enable direct communication between the first network device 200a and the second network device 200b.
  • the connection may be a wired or wireless connection.
  • the terminal device 100 shown in Figure 1 is in the serving area covered by the transmission-reception point (TRP) of the first network device 200a and the transmission-reception point (TRP) of the second network device 200b.
  • the terminal device 100 is connected with the first network device 200a via a first wireless link and is connected with the second network device 200b via a second wireless link.
  • a third network device 200c such as a wireless controller, may be connected to the first and second network devices 200a and 200b.
  • the terminal device 100 is equipped and configured to be able to connect with the first and second network devices 200a, 200b simultaneously.
  • the terminal device 100 and the first and second network devices 200a, 200b can perform uplink transmission (terminal device 100 to network device 200) and downlink transmission (network device 200 to terminal device 100) .
  • Figure 1 exemplarily shows three network devices 200 and one terminal device 100.
  • the wireless communication system 10 may include a plurality of network devices 200, and the coverage of each network device 200 may include any number of terminal devices 100.
  • FIG. 2 shows a schematic illustration of the terminal device 100 of the communication system 10 of Figure 1.
  • the terminal device 100 includes a communication unit 110 comprising a first receiving unit 111 and a second receiving unit 112.
  • the communication unit 110 may further include a transmitting unit 113 and the terminal device 100 may further include a processing unit 120.
  • the communication unit 110 is configured to communicate with the network device 200. More specifically, the communication unit 110 is configured to perform both uplink communication (i.e. terminal device 100 to network device 200) and downlink communication (i.e. network device 200 to terminal device 100) .
  • uplink communication i.e. terminal device 100 to network device 200
  • downlink communication i.e. network device 200 to terminal device 100
  • the first and second receiving units 111, 112 are arranged to receive a reference signal.
  • the first receiving unit 111 may be configured to receive a first set of reference signal resources and the second receiving unit 112 may be configured to receive a second set of reference signal resources.
  • the first and second receiving units 111, 112 may each be a receiving panel.
  • a receiving panel may include a group of physical antennas, and each panel may be able to receive signals on an independent radio frequency channel.
  • the terminal device 100 may be configured with a first resource setting to measure reference signal resources within the first set of reference signal resources.
  • the terminal device 100 may be configured with a second resource setting to measure reference signal resources within the second set of reference signal resources.
  • the first resource setting may be for channel measurement on Synchronization Signal Block (SSB) or NZP CSI-RS resources for L1-RSRP computation and the second resource setting may be for channel measurement on SSB or NZP CSI-RS resources for L1-RSRP computation.
  • SSB Synchronization Signal Block
  • NZP CSI-RS resources for L1-RSRP computation
  • the second resource setting may be for channel measurement on SSB or NZP CSI-RS resources for L1-RSRP computation.
  • the transmitting unit 113 may transmit information, such as a configuration report, a beam report or any other information, to at least one of the first network device 200a and the second network device 200b by transmitting a beam as shown in Figure 1.
  • a configuration report states configuration information of the terminal device 100.
  • a beam report states at least one measurement result of at least one received beam.
  • the processing unit 120 is configured to control the overall functionality of the terminal device 100, including that of the communication unit 110. This includes controlling the communication unit 110 to perform both uplink and downlink communications, as well as processing signals received through the downlink transmissions.
  • the processing unit 120 may be configured to measure the reference signal resources within the resource setting (s) of the terminal device 100 using the receiving units 111, 112. For example, the processing unit 120 may measure a reference signal resource (such as a CSI-RS resource or SS/PBCH block) and generate a corresponding reference signal resource indicator (such as a CRI or SSBRI) .
  • a reference signal resource such as a CSI-RS resource or SS/PBCH block
  • a corresponding reference signal resource indicator such as a CRI or SSBRI
  • the processing unit 120 may be configured to control the transmitting unit 113 to transmit information, such as a configuration report or beam report, to at least one of the first and second network devices 200a, 200b.
  • the configuration report may state that the terminal device 100 is able to receive downlink transmission of the first set of reference signal resources and the second set of reference signal resources on overlapped orthogonal frequency-division multiplexing (OFDM) symbols (i.e. simultaneously) .
  • OFDM orthogonal frequency-division multiplexing
  • the terminal device 100 receives a first beam transmitted from the first network device 200a and receives a second beam transmitted from the second network device 200b.
  • Each of the first and second beams may be Physical Downlink Shared Channel (PDSCH) transmissions.
  • PDSCH is a physical channel that carries data.
  • the first network device 200a may use transmission (Tx) beam-A to transmit information, on a first channel (PDSCH 1) , to the terminal device 100 while the second network device 200b may use Tx beam-B to transmit information, on a second channel (PDSCH 2) , to the terminal device 100.
  • Tx transmission
  • PDSCH 1 first channel
  • PDSCH 2 second channel
  • the terminal device 100 includes a first and second receiving unit in the present embodiment, the embodiments of the present application are not limited thereto.
  • the terminal device 100 includes at least one receiving unit such as a receiving panel.
  • the terminal device 100 may have multiple receive panels and, on each panel, the terminal device 100 can implement one or multiple different receive (Rx) beam directions. However, on each panel, the terminal device 100 can only formulate one Rx beam direction at one time while the terminal device 100 can formulate different Rx beam directions on multiple Rx panels.
  • the terminal device 100 uses one Rx panel to measure Tx beam-A and use another Rx panel to measure Tx beam-B to receive the PDSCH 1 and PDSCH 2 transmissions from the two network devices 200a, 200b.
  • the PDSCH 1 and PDSCH 2 transmissions can be fully, partially or not overlapped in time domain.
  • the terminal device 100 receives the signals transmitted by both Tx beam-A and Tx beam-B simultaneously. Based on beam training, the terminal device 100 pairs a first received beam with Tx beam-A and a second received beam with Tx beam-B.
  • the terminal device 100 uses the first receiving unit 111 and the second receiving unit 112 during the time period (on the same OFDM symbol) , i.e., simultaneously.
  • FIG 3 shows a schematic illustration of the network device 200 of the communication system 10 of Figure 1.
  • the network device 200 comprises a communication unit 210 and a processing unit 220.
  • the communication unit 210 is configured to communicate with the terminal device 100. More specifically, the communication unit 210 is configured to perform both uplink communication (i.e. terminal device 100 to network device 200) and downlink communication (i.e. network device 200 to terminal device 100) .
  • the communication unit 21o may be configured to transmit a beam using a first set of reference signal resources or a second set of reference signal resources.
  • the communication unit 210 may be configured to transmit downlink control information (DCI) and/or Radio Resource Control (RRC) configuration information to configure the terminal device 100.
  • DCI downlink control information
  • RRC Radio Resource Control
  • the processing unit 220 is configured to control the overall functionality of the network device 200, including that of the communication unit 210. This includes controlling the communication unit 210 to perform both uplink and downlink communications, as well as processing signals received through the uplink transmissions.
  • the processing unit 220 may be configured to control which set of reference signal resources are transmitted by the communication unit 210.
  • the terminal device 100 may be configured with a resource setting for channel measurement that contains a set of non-zero power (NZP) CSI-RS resources or SS/PBCH blocks.
  • NZP non-zero power
  • Each NZP CSI-RS resource or SS/PBCH block is used to represent one network device (gNB) 200 transmit beam.
  • the terminal device 100 is configured to measure the L1-RSRP of those NZP CSI-RS resources or SS/PBCH blocks.
  • the terminal device 100 may report two CSI-RS Resource Indicators (CRIs) or SS/PBCH Resource Block Indicators (SSBRIs) for two selected NZP CSI-RS resources or SS/PBCH blocks for which the terminal device 100 is able to use a single spatial domain receive filter or multiple simultaneous spatial domain receive filters.
  • CRIs CSI-RS Resource Indicators
  • SSBRIs SS/PBCH Resource Block Indicators
  • the terminal device 100 may be configured with one of the following resource setting configurations:
  • the terminal device 100 is configured with one resource setting with a set of NZP CSI-RS resources for channel measurement and interference measurement, or
  • the terminal device 100 is configured with two resource settings.
  • the first resource setting has a set of NZP CSI-RS resources or SS/PBCH blocks for channel measurements and the second resource setting has a set of NZP CSI-RS resources or ZP CSI-RS resources for interference measurement.
  • the terminal device 100 may report up to 4 CRIs or SSBRIs and the corresponding L1-SINR measurement results.
  • Group-based beam reporting of L1-SINR is also supported, in which the terminal device 100 may report up to 2 CRIs or SSBRIs and the corresponding L1-SINR measurement results.
  • Figure 4 shows a flowchart of the operation of the terminal device 100 of Figure 2.
  • the terminal device 100 may be configured to receive and report multiple beams from different transmission-reception points simultaneously.
  • the terminal device 100 receives information to configure the first and second receiving units 111, 112.
  • the terminal device 100 may receive downlink control information (DCI) and/or RRC configuration information from at least one of the first and second network devices 200a, 200b to configure the first and second receiving units 111, 112.
  • DCI downlink control information
  • RRC configuration information from at least one of the first and second network devices 200a, 200b to configure the first and second receiving units 111, 112.
  • the communication unit 110 may receive a communication from a network device 200 comprising instructions.
  • the processing unit 120 may follow the instructions to configure the terminal device 100 to measure reference signal resources in a first reference signal resource set and configure the terminal device 100 to measure reference signal resources in a second reference signal resource set.
  • Downlink control information provides the terminal device 100 with information such as physical layer (Layer 1) resource allocation and power control commands for both uplink and downlink transmission.
  • DCI is transmitted on the Physical Downlink Control Channel (PDCCH) with 24-bit cyclic redundancy check (CRC) attachment.
  • PDCCH Physical Downlink Control Channel
  • CRC cyclic redundancy check
  • the processing unit 120 configures the terminal device 100.
  • the processing unit 120 may configure the terminal device 100 to measure reference signal resources in a first reference signal resource set and configure the terminal device 100 to measure reference signal resources in a second reference signal resource set.
  • the reference signal resources may be CSI-RS resources or SS/PBCH blocks.
  • the terminal device 100 can be configured with one or more NZP CSI-RS resource set configuration (s) as indicated by the higher layer parameters CSI-ResourceConfig, and NZP-CSI-RS-ResourceSet.
  • Each NZP CSI-RS resource set consists of K ⁇ 1 NZP CSI-RS resource (s) .
  • the higher layer parameter is a Radio Resource Control (RRC) parameter.
  • RRC Radio Resource Control
  • embodiments are not limited to this, and alternative higher layer (i.e. higher than the physical layer) parameters can be used instead.
  • the terminal device 100 generates a configuration report.
  • the configuration report states the report setting configuration of the terminal device 100.
  • the configuration report details the first set of reference signal resources that are configured to be measured using the first receiving unit 111 and the second set of reference signal resources that are configured to be measured using the second receiving unit 112.
  • the terminal device 100 may transmit the configuration report to a network device 200 (such as at least one of the first and second network devices 200a, 200b) using the communication unit 110.
  • the terminal device 100 may generate the configuration report at step S43 of Figure 4 if the terminal device 100 does not receive the information described in step S41 from a network device 200 instructing the terminal device 100 on how to be configured.
  • the terminal device 100 receives a first beam comprising the first set of reference signal resources from the first network device 200a and receives a second beam comprising a second set of reference signal resources from the second network device 200b.
  • the first beam is received by the first receiving unit 111 and the second beam is received by the second receiving unit 112.
  • the terminal device 100 uses the first receiving unit 111 to measure the first beam and uses the second receiving unit to measure the second beam.
  • the first beam and the second beam are received at least partially simultaneously (e.g. on overlapped OFDM symbols) .
  • the terminal device 100 generates a beam report stating K reference signal resource indicators from the first set of reference signal resources, and K reference signal resource indicators from the second set of reference signal resources.
  • the reference signal resource indicators may be CRIs or SSBRIs.
  • the terminal device 100 may further include measurement results within the beam report.
  • the terminal device 100 may further include reference signal received power measurement results or reference signal received signal to interference noise ratio measurement results within the beam report.
  • the terminal device 100 may include the L1-RSRP or L1-SINR measurement results for each reference signal resource indicator included within the beam report.
  • the terminal device 100 transmits the generated beam report to a network device 200.
  • the processing unit 120 may control the transmitting unit 113 to transmit the beam report to at least one of the first and second network devices 200a, 200b.
  • the information on the direction in which to transmit a beam from the terminal device 100 to at least one of the network devices 200 may be contained within any previous downlink transmission received by the terminal device 100.
  • the terminal device 100 may report to at least one of the first and second network devices 200a, 200b the information that Tx beam-Afrom the first network device 200a and Tx beam-B from the second network device 200b can be transmitted by the system 10 because the terminal device 100 is able to receive downlink transmission with those two Tx beams on overlapped OFDM symbols.
  • the terminal device 100 is configured to measure a first set of reference signal resources that are transmitted from a first network device 200a and the terminal device 100 is configured to measure a second set of reference signal resources that are transmitted from a second network device 200b.
  • the terminal device 100 reports K reference signal resources in the first set and K reference signal resources in the second set to at least one of the first and second network devices 200a, 200b.
  • the terminal device 100 may use different spatial domain receive filters to receive the reference signal resources from different sets on one same OFDM symbol.
  • the terminal device 100 may also report the L1-RSRP or L1-SINR measurement results of each reference signal resource using the corresponding spatial domain receive filter.
  • CSI NR Channel State Information
  • a beam report such as a Channel State Information (CSI) report transmitted from the terminal device 100 to the network device 200 may provide information on the best direction to transmit a beam from the network device 200 to the terminal device 100.
  • CSI Channel State Information
  • the terminal device 100 may report in a single reporting instance K pairs of two different CSI-RS resource indicators (CRIs) or SS/PBCH resource block indicators (SSBRIs) for each report setting, where within each pair of CRIs or SSBRIs, the CSI-RS and/or synchronization signal block (SSB) resources can be received simultaneously by the terminal device 100 either with a single spatial domain receive filter, or with multiple simultaneous spatial domain receive filters.
  • a single spatial domain receive filter can be used when the first and second network devices 200a, 200b are located within a similar direction relative to the terminal device 100 which enables both beams to be received using the single spatial domain receive filter.
  • the terminal device 100 may report in a single reporting instance K pairs of two different CRI or SSBRI for each report setting, where within each pair of CRI or SSBRI, the CSI-RS and/or SSB resources can be received simultaneously by the terminal device 100 with different spatial domain receive filters.
  • Different spatial domain receive filters may be used when the first and second network devices 200a, 200b are located at substantially different directions relative to the terminal device 100.
  • K is 1, 2, 4, 6, or 8. However, K is not limited to the listed values and may be any positive integer value.
  • the value of K can be configured by the network device 200, for example, it can be configured in a reporting setting to indicate the number of pairs the terminal device 100 may report.
  • the reporting setting may be contained within a transmission, such as a DCI and/or RRC transmission, from at least one of the first and second network devices 200a, 200b to the terminal device 100.
  • Figure 5 shows a flowchart of the operation of the network devices 200a, 200b of Figure 3.
  • the flowchart of Figure 5 showing the operations of the network device 200 generally corresponds to the flowchart of Figure 4, but from the perspective of the network device 200, and corresponding considerations apply.
  • the network device 200 can configure the terminal device 100 to receive and report multiple beams simultaneously.
  • At step S51 of Figure 5 (which is optional) , at least one of the first network device 200a and the second network device 200b transmit information to configure the terminal device 100.
  • the at least one of the first and second network devices 200a, 200b may transmit downlink control information (DCI) and/or RRC configuration information to configure the terminal device 100.
  • DCI downlink control information
  • RRC configuration information to configure the terminal device 100.
  • a third network device 200c may be connected to the first and second network devices 200a, 200b and may control the at least one of the first and second network devices 200a, 200b to transmit the information, such as DCI or RRC, to the terminal device 100.
  • the third network device 200c may be a gNB, or a wireless controller.
  • at least one of the processing units 210 of the first and second network devices 200a, 200b may control the at least one of the first and second network devices 200a, 200b to transmit the information, such as DCI or RRC, to the terminal device 100.
  • Each of the first and second network devices 200a, 200b may be a gNB which may communicate with each other to generate the information to configure the terminal device 100.
  • At step S52 of Figure 5 at least one of the first and second network devices 200a, 200b may receive a configuration report from the terminal device 100.
  • the configuration report states the configuration of the terminal device 100.
  • the configuration report details the reference signal resource sets that the terminal device 100 is configured to receive.
  • the configuration report may state that the first receiving unit is configured to receive reference signal resources in a first set and the second receiving unit is configured to receive reference signal resources in a second set.
  • the first network device 200a transmits a first beam comprising a first set of reference signal resource and the second network device 200b transmits a second beam comprising a second set of reference signal resources to the terminal device 100.
  • the first and second beams are transmitted to overlap in the time domain and so are at least partially simultaneously received by the terminal device 100.
  • the reference signal resource set of each beam may be based on the configuration report received from the terminal device 100.
  • the reference signal resource set of each beam may be based on the information transmitted to the terminal device 100.
  • the first network device 200a and the second network device 200b may directly or indirectly communicate with each other to allocate a reference signal resource set to the beam to be transmitted from each of the first and second network devices 200a, 200b.
  • the indirect connection for communication between the first network device 200a and the second network device 200b may be via the third network device 200c.
  • the connection may be a wireless connection.
  • the beam report includes the beam measurements made by the terminal device 100.
  • the beam report may state K reference signal resource indicators for reference signal resources from the first set of reference signal resources and K reference signal resource indicators for reference signal resources from the second set of reference signal resources.
  • the above method enables a network device 200 (such as any one of the first, second and third network devices 200a, 200b, 200c) to select two transmit beams from two different transmission-reception points (such as first and second network devices 200a, 200b) that can be used to transmit Physical Downlink Control Channel (PDCCH) transmissions or Physical Downlink Shared Channel (PDSCH) transmissions on overlapped symbols (i.e. simultaneously) to a terminal device 100 based on beam reporting.
  • PDCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • Figure 6 is a schematic flowchart of a method for group based beam reporting. The method may be applied to the system shown in Figure 1, but is not limited thereto.
  • the method includes: in step S61 of Figure 6, configuring the terminal device 100 to measure a first set of reference signal resources.
  • step S62 of Figure 6 configuring the terminal device 100 to measure a second set of reference signal resources.
  • the terminal device 100 may report configuration information to at least one of the first network device 200a and the second network device 200b that beams comprising the first set of reference signal resources and the second set of reference signal resources, respectively, can be received simultaneously by the terminal device 100.
  • step S63 of Figure 6 the method includes controlling the first network device 200a to transmit the first set of reference signal resources to the terminal device 100.
  • step S64 of Figure 6 the method includes controlling the second network device 200b to simultaneously transmit the second set of reference signal resources to the terminal device 100.
  • a third network device 200c such as a wireless controller or gNB, connected to the first network device 200a and the second network device 200b may configure the first network device 200a to transmit the first set of reference signal resources and configure the second network device 200b to transmit the second set of reference signal resources.
  • the first and second network devices 200a, 200b may communicate with each other directly to configure the first network device 200a to transmit the first set of reference signal resources and configure the second network device 200b to transmit the second set of reference signal resources.
  • the terminal device 100 simultaneously receives beams from the first network device 200a and the second network device 200b and generates a beam report comprising K reference signal resource indicators from the first set of reference signal resources and K reference signal resource indicators from the second set of reference signal resources.
  • the beam report may contain a CRI or SSBRI for a NZP CSI-RS resource and/or SSB resource.
  • the beam report may contain a measurement result, such as a power measurement result.
  • step S66 of Figure 6 the terminal device 100 transmits the generated beam report to at least one of the first network device 200a and the second network device 200b.
  • the at least one of the first network device 200a and the second network device 200b that receives the beam report may transmit the beam report to the third network device 200c.
  • the third network device 200c connected to the first network device 200a and the second network device 200b may use the beam report to determine which transmission beam is best for each receiving unit of the terminal device 100.
  • the at least one of the first network device 200a and the second network device 200b that receives the beam report may use the beam report to determine which transmission beam is best for each receiving unit of the terminal device 100.
  • the best beam may be the beam which is received by the terminal device 100 receiving unit with the highest power and/or the highest signal to interference noise ratio.
  • the best beam may be determined using any measurement metric and is not limited to the above examples.
  • the following methods can be used for mapping the CRI/SSBRI and RSRP report in one beam report.
  • Table 1-1 mapping order of CSI fields in one beam report
  • the CRI or SSBRI #1 and CRI or SSBRI#2 belong to the same pair of CRI or SSBRI report, where the terminal device 100 can receive them simultaneously either with a single spatial domain receive filter, or with multiple simultaneous spatial domain receive filters.
  • the CRI or SSBRI #3 and CRI or SSBRI#4 belong to the same pair of CRI or SSBRI report, where the terminal device 100 can receive them simultaneously either with a single spatial domain receive filter, or with multiple simultaneous spatial domain receive filters.
  • the RSRP measurement results may be absolute values or may be relative to an absolute value.
  • RSRP #1 is an absolute measurement value
  • differential RSRP #2 is a measurement value relative to RSRP #1.
  • Table 1-2 mapping order of CSI fields in one beam report
  • the CRI or SSBRI #1 and CRI or SSBRI#3 belong to the same pair of CRI or SSBRI report, where the terminal device 100 can receive them simultaneously either with a single spatial domain receive filter, or with multiple simultaneous spatial domain receive filters.
  • the CRI or SSBRI #2 and CRI or SSBRI#4 belong to the same pair of CRI or SSBRI report, where the terminal device 100 can receive them simultaneously either with a single spatial domain receive filter, or with multiple simultaneous spatial domain receive filters.
  • the terminal device 100 can be configured with two resource settings for channel measurement for L1-RSRP reporting.
  • the first one resource setting is for channel measurement on SSB or NZP CSI-RS resources for L1-RSRP computation and the second one resource setting is for channel measurement on SSB or NZP CSI-RS resources for L1-RSRP computation.
  • the terminal device 100 may report in a single reporting instance K pairs of two different CRI or SSBRI for each report setting, where within each pair of CRI or SSBRI, the CSI-RS and/or SSB resources can be received simultaneously by the terminal device 100 either with a single spatial domain receive filter, or with multiple simultaneous spatial domain receive filters, where in each pair of CRI or SSBRI, one CRI or SSBRI is selected from the first one resource setting and another CRI or SSBRI is selected from the second one resource setting.
  • the terminal device 100 may report in a single reporting instance K pairs of two different CRI or SSBRI for each report setting, where within each pair of CRI or SSBRI, the CSI-RS and/or SSB resources can be received simultaneously by the terminal device 100 with different simultaneous spatial domain receive filters, where in each pair of CRI or SSBRI, one CRI or SSBRI is selected from the first one resource setting and another CRI or SSBRI is selected from the second one resource setting.
  • Exemplary values of K can be 1, 2, 4, 6, or 8.
  • the value of K can be configured by the network device 200, for example, it can be configured in reporting setting to indicate the number of pairs the terminal device 100 may report. According to the disclosed embodiments, the following methods can be used for mapping the CRI/SSBRI and RSRP report in one beam report.
  • Table 2-1 mapping order of CSI fields in one beam report
  • the CRI or SSBRI #1 and CRI or SSBRI#2 belong to the same pair of CRI or SSBRI report, where the terminal device 100 can receive them simultaneously either with a single spatial domain receive filter, or with multiple simultaneous spatial domain receive filters and CRI or SSBRI #1 is selected from the first one resource setting and the CRI or SSBRI #2 is selected from the second one resource setting.
  • the CRI or SSBRI #3 and CRI or SSBRI#4 belong to the same pair of CRI or SSBRI report, where the terminal device 100 can receive them simultaneously either with a single spatial domain receive filter, or with multiple simultaneous spatial domain receive filters and the CRI or SSBRI #3 is selected from the first one resource setting and the CRI or SSBRI #4 is selected from the second one resource setting.
  • Table 2-2 mapping order of CSI fields in one beam report
  • the CRI or SSBRI #1 and CRI or SSBRI#3 belong to the same pair of CRI or SSBRI report, where the terminal device 100 can receive them simultaneously either with a single spatial domain receive filter, or with multiple simultaneous spatial domain receive filters and the CRI or SSBRI #1 is selected from the first one resource setting and CRI or SSBRI#3 is selected from the second one resource setting.
  • the CRI or SSBRI #2 and CRI or SSBRI#4 belong to the same pair of CRI or SSBRI report, where the terminal device 100 can receive them simultaneously either with a single spatial domain receive filter, or with multiple simultaneous spatial domain receive filters, and the CRI or SSBRI#2 is selected from the first one resource setting and the CRI or SSBRI#4 is selected from the second one resource setting.
  • a terminal device 100 can be configured with a first one resource setting with SSB blocks or NZP CSI-RS resources for channel measurement and the terminal device 100 is configured with a value of K in reporting setting.
  • the terminal device 100 is configured to report two subsets of K CRI or SSBRI in a single CSI report. For any two CRI or SSBRI in the same subset, the terminal device 100 is not able to receive them simultaneously with multiple different simultaneous spatial domain receive filters and for any two CRI or SSBRI in different subset, the terminal device 100 is able to receive them simultaneously with a single spatial domain receive filter or with multiple simultaneous spatial domain receive filters.
  • CRI or SSBRI #1 and #2 belong to the first subset and CRI or SSBRI #3 and #4 belong to the second subset.
  • CRI or SSBRI #1 and #3 belong to the first subset and CRI or SSBRI #2 and #4 belong to the second subset.
  • a terminal device 100 can be configured with two resource settings for channel measurement. In a first one resource setting, the terminal device 100 can be configured with SSB blocks or NZP CSI-RS resources for channel measurement for L1-RSRP computation and in a second one resource setting, the terminal device 100 can be configured with SSB blocks or NZP CSI-RS resources for channel measurement for L1-RSRP computation. In the reporting setting, the terminal device 100 can be configured with K 1 that is the number of CRI or SSBRI that the terminal device 100 may select from each resource setting for reporting in each reporting subset in a single CSI report.
  • the terminal device 100 reports 4 x K 1 CRIs or SSBRIs selected from the first one resource setting and the second one resource setting.
  • the terminal device 100 reports K 1 CRIs or SSBRIs selected from the first one resource setting and K 1 CRIs or SSBRIs selected from the second one resource setting.
  • the terminal device 100 reports K 1 CRIs or SSBRIs selected from the first one resource setting and K 1 CRIs or SSBRIs selected from the second one resource setting.
  • the terminal device 100 For any two CRI or SSBRI reported in a same reporting subset, the terminal device 100 is not able to receive them simultaneously with different simultaneous spatial domain receive filter. And for any two CRI or SSBRI reported in two different reporting subsets, the terminal device 100 is able to receive them simultaneously with a same spatial domain receive filter or multiple simultaneous spatial domain receive filters. In another example, for any two CRI or SSBRI reported in two different reporting subsets, the terminal device 100 is able to receive them simultaneously with multiple simultaneous spatial domain receive filters.
  • CRI or SSBRI #1 ⁇ 4 are in the first reporting subset and CRI or SSBRI #5 ⁇ 8 are in the second reporting subset.
  • the CRI or SSBRI #1, #2, #5 and #6 are selected from the first one resource setting.
  • the CRI or SSBRI #3, #4, #7 and #8 are selected from the first one resource setting.
  • CRI or SSBRI #1, #2, #5 and #6 are in the first reporting subset and CRI or SSBRI #3, #4, #7 and #8 are in the second reporting subset.
  • the CRI or SSBRI #1, #2, #3 and #4 are selected from the first one resource setting and the CRI or SSBRI #5 ⁇ #8 are selected from the second one resource setting.
  • the present disclosure provides the following methods for group-based beam measurement and report:
  • One terminal device 100 is configured with two resource setting for channel measurement and the terminal device 100 is configured to report K ⁇ 1 pairs of CRI or SSBRI, where in each pair, those two CRI or SSBRI can be received by the terminal device 100 simultaneously with same or different spatial domain receive filters. In each pair, one CRI or SSBRI is selected from the first one resource setting and the other CRI or SSBRI is selected from the second one resource setting.
  • One terminal device 100 reports multiple CRIs or SSBRIs that can be received by the terminal device 100 with different spatial domain receive filters that the terminal device 100 can implement at the same time.
  • the terminal device 100 can report two CRIs: CRI#1 and CRI#2 and the L1-RSRP measurement for CRI#1 and CRI#2 that are measured with different spatial domain receive filters that can be used by the terminal device 100 at the same time, i.e., on same OFDM symbols.
  • CRI#1 and CRI#2 may be selected from two resource setting (or two resource set configured in resource setting for channel measurement) configured for channel measurement.
  • the terminal device 100 reports two subsets of 2 x K 1 CRIs or SSBRIs: a first set of CRIs or SSBRIs and a second set of CRIs or SSBRIs.
  • the CRIs or SSBRIs in the same set cannot be received by the terminal device 100 simultaneously one overlapped symbols with different spatial domain receive filter while the terminal device 100 is able to receive any one of CRI or SSBRI in the first set and any one of CRI or SSBRI in the second set simultaneously on overlapped symbols with different spatial domain receive filters.
  • the terminal device 100 reports K 1 CRIs or SSBRIs selected from the first one resource setting and the terminal device 100 reports K 1 CRIs or SSBRIs selected from the second one resource setting.
  • Embodiments can also provide a computer-readable medium having computer-executable instructions to cause one or more processors of a computing device to carry out the method of any of the embodiments.
  • Examples of computer-readable media include both volatile and non-volatile media, removable and non-removable media, and include, but are not limited to: solid state memories; removable disks; hard disk drives; magnetic media; and optical disks.
  • the computer-readable media include any type of medium suitable for storing, encoding, or carrying a series of instructions executable by one or more computers to perform any one or more of the processes and features described herein.
  • each of the components discussed can be combined in a number of ways other than those discussed in the foregoing description.
  • the functionality of more than one of the discussed devices can be incorporated into a single device.
  • the functionality of at least one of the devices discussed can be split into a plurality of separate (or distributed) devices.
  • Conditional language such as “may” , is generally used to indicate that features/steps are used in a particular embodiment, but that alternative embodiments may include alternative features, or omit such features altogether.
  • the method steps are not limited to the particular sequences described, and it will be appreciated that these can be combined in any other appropriate sequences. In some embodiments, this may result in some method steps being performed in parallel. In addition, in some embodiments, particular method steps may also be omitted altogether.

Abstract

Procédé destiné à la mesure de faisceau, le procédé faisant appel aux étapes suivantes : la mesure d'un premier ensemble de ressources de signal de référence contenues dans un premier faisceau transmis à partir d'un premier dispositif de réseau et reçu par une première unité de réception d'un équipement terminal; et la mesure d'un second ensemble de ressources de signal de référence contenues dans un second faisceau transmis à partir d'un second dispositif de réseau et reçu par une seconde unité de réception de l'équipement terminal.
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