WO2021228201A1 - Appareil et procédé de communication sans fil - Google Patents

Appareil et procédé de communication sans fil Download PDF

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Publication number
WO2021228201A1
WO2021228201A1 PCT/CN2021/093636 CN2021093636W WO2021228201A1 WO 2021228201 A1 WO2021228201 A1 WO 2021228201A1 CN 2021093636 W CN2021093636 W CN 2021093636W WO 2021228201 A1 WO2021228201 A1 WO 2021228201A1
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Prior art keywords
qcl
default
coreset
trp
lowest
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PCT/CN2021/093636
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English (en)
Inventor
Li Guo
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Guangdong Oppo Mobile Telecommunications Corp., Ltd.
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Publication of WO2021228201A1 publication Critical patent/WO2021228201A1/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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0092—Indication of how the channel is divided
    • 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
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • 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
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows

Definitions

  • the present disclosure relates to the field of communication systems, and more particularly, to an apparatus and a method of wireless communication, which can provide a good communication performance and/or high reliability.
  • New radio (NR) system introduces a multi-transmission/reception point (TRP) based non-coherent joint transmission.
  • TRP multi-transmission/reception point
  • Multiple TRPs are connected through backhaul link for coordination.
  • the backhaul link can be ideal or non-ideal.
  • the TRPs can exchange dynamic physical downlink shared channel (PDSCH) scheduling information with short latency and thus different TRPs can coordinate a PDSCH transmission per PDSCH transmission.
  • PDSCH physical downlink shared channel
  • the information exchange between TRPs has large latency and thus the coordination between TRPs can only be semi-static or static.
  • a default spatial relation for physical uplink control channel (PUCCH) , sounding reference signal (SRS) , and physical uplink shared channel (PUSCH) scheduled by downlink control information (DCI) format 0_0 in a multi-TRP system is not defined. That has couple of consequences.
  • One consequence is a user equipment (UE) behavior is not clear on transmitting a PUCCH, an SRS, or a PUSCH scheduled by the DCI format 0_0 when a spatial relation is not provided to the UE. And the UE behavior on determining transmit power on signals and channels is not clear too.
  • each PUCCH resource, SRS resource, or PUSCH scheduled by the DCI format 0_0 can be transmitted to the right TRP. But current method does not specify that.
  • an apparatus such as a user equipment (UE) and/or a base station
  • a method of wireless communication which can solve issues in the prior art, utilize multi-transmission/reception point (TRP) reception, improve uplink reliability, provide a good communication performance, and/or provide high reliability.
  • TRP multi-transmission/reception point
  • An object of the present disclosure is to propose an apparatus (such as a user equipment (UE) and/or a base station) and a method of wireless communication, which can solve issues in the prior art, utilize multi-transmission/reception point (TRP) reception, improve uplink reliability, provide a good communication performance, and/or provide high reliability.
  • TRP multi-transmission/reception point
  • a method of wireless communication by a user equipment comprises being scheduled, by a base station, with an uplink channel and determining a spatial relation and a pathloss reference signal (RS) for the uplink channel, wherein when the uplink channel comprises a physical uplink shared channel (PUSCH) , a default spatial relation and a default pathloss RS can be an RS with quasi co-location (QCL) -Type-D corresponding to a QCL assumption of a control resource set (CORESET) with a lowest identifier (ID) .
  • QCL quasi co-location
  • CORESET control resource set
  • ID lowest identifier
  • a method of wireless communication by a base station comprises scheduling, to a user equipment (UE) , an uplink channel and determining a spatial relation and a pathloss reference signal (RS) for the uplink channel, wherein when the uplink channel comprises a physical uplink shared channel (PUSCH) , a default spatial relation and a default pathloss RS can be an RS with quasi co-location (QCL) -Type-D corresponding to a QCL assumption of a control resource set (CORESET) with a lowest identifier (ID) .
  • QCL quasi co-location
  • CORESET control resource set
  • a user equipment comprises a memory, a transceiver, and a processor coupled to the memory and the transceiver.
  • the processor is configured to be scheduled, by a base station, with an uplink channel.
  • the processor is configured to determine a spatial relation and a pathloss reference signal (RS) for the uplink channel, wherein when the uplink channel comprises a physical uplink shared channel (PUSCH) , a default spatial relation and a default pathloss RS can be an RS with quasi co-location (QCL) -Type-D corresponding to a QCL assumption of a control resource set (CORESET) with a lowest identifier (ID) .
  • QCL quasi co-location
  • CORESET control resource set
  • a base station comprises a memory, a transceiver, and a processor coupled to the memory and the transceiver.
  • the processor is configured to schedule, to a user equipment (UE) , an uplink channel.
  • the processor is configured to determine a spatial relation and a pathloss reference signal (RS) for the uplink channel, wherein when the uplink channel comprises a physical uplink shared channel (PUSCH) , a default spatial relation and a default pathloss RS can be an RS with quasi co-location (QCL) -Type-D corresponding to a QCL assumption of a control resource set (CORESET) with a lowest identifier (ID) .
  • QCL quasi co-location
  • CORESET control resource set
  • a non-transitory machine-readable storage medium has stored thereon instructions that, when executed by a computer, cause the computer to perform the above method.
  • a chip includes a processor, configured to call and run a computer program stored in a memory, to cause a device in which the chip is installed to execute the above method.
  • a computer readable storage medium in which a computer program is stored, causes a computer to execute the above method.
  • a computer program product includes a computer program, and the computer program causes a computer to execute the above method.
  • a computer program causes a computer to execute the above method.
  • FIG. 1A is a schematic diagram illustrating that example of multi-transmission/reception point (TRP) transmission according to an embodiment of the present disclosure.
  • FIG. 1B is a schematic diagram illustrating that example of multi-transmission/reception point (TRP) transmission according to an embodiment of the present disclosure.
  • FIG. 2 is a block diagram of one or more user equipments (UEs) and a base station (e.g., gNB or eNB) of communication in a communication network system according to an embodiment of the present disclosure.
  • UEs user equipments
  • base station e.g., gNB or eNB
  • FIG. 3 is a flowchart illustrating a method of wireless communication by a user equipment (UE) according to an embodiment of the present disclosure.
  • FIG. 4 is a flowchart illustrating a method of wireless communication by a base station according to an embodiment of the present disclosure.
  • FIG. 5 is a block diagram of a system for wireless communication according to an embodiment of the present disclosure.
  • TRPs transmission/reception points
  • PDCCHs physical downlink control channels
  • PDSCH physical downlink sharing channel
  • DCI downlink control information
  • PDSCHs from different TRPs can be scheduled in the same slot or different slots.
  • Two different PDSCH transmissions from different TRPs can be fully overlapped or partially overlapped in PDSCH resource allocation.
  • UE user equipment
  • the UE can feedback a hybrid automatic repeat request-acknowledge (HARQ-ACK) information to a network.
  • HARQ-ACK hybrid automatic repeat request-acknowledge
  • the UE can feedback the HARQ-ACK information for each PDSCH transmission to the TRP transmitting the PDSCH.
  • the UE can also feedback the HARQ-ACK information for a PDSCH transmission sent from any TRP to one particular TRP.
  • FIG. 1A An example of multi-TRP based non-coherent joint transmission is illustrated in FIG. 1A.
  • a UE receives a PDSCH based on non-coherent joint transmission from two TRPs: TRP1 and TRP2.
  • the TRP1 sends one DCI to schedule a transmission of PDSCH 1 to the UE and the TRP2 sends one DCI to schedule a transmission of PDSCH 2 to the UE.
  • the UE receives and decodes DCI from both TRPs. Based on the DCI from the TRP1, the UE receives and decodes the PDSCH 1 and based on the DCI from the TRP2, the UE receives and decodes the PDSCH 2.
  • the UE reports HARQ-ACK for PDSCH 1 and PDSCH2 to the TRP1 and the TRP 2, respectively.
  • the TRP1 and the TRP 2 use different control resource sets (CORESETs) and search spaces to transmit DCI scheduling PDSCH transmission to the UE. Therefore, the network can configure multiple CORESETs and search spaces.
  • Each TRP can be associated with one or more CORESETs and also the related search spaces. With such configuration, the TRP would use the associated CORESET to transmit DCI to schedule a PDSCH transmission to the UE.
  • the UE can be requested to decode DCI in CORESETs associated with either TRP to obtain PDSCH scheduling information.
  • FIG. 1B Another example of multi-TRP transmission is illustrated in FIG. 1B.
  • a UE receives PDSCH based on non-coherent joint transmission from two TRPs: TRP1 and TRP2.
  • the TRP1 sends one DCI to schedule a transmission of PDSCH 1 to the UE and the TRP2 sends one DCI to schedule the transmission of PDSCH 2 to the UE.
  • the UE receives and decodes DCI from both TRPs. Based on the DCI from the TRP1, the UE receives and decodes the PDSCH 1 and based on the DCI from the TRP2, the UE receives and decodes the PDSCH 2.
  • FIG. 1B A UE receives PDSCH based on non-coherent joint transmission from two TRPs: TRP1 and TRP2.
  • the TRP1 sends one DCI to schedule a transmission of PDSCH 1 to the UE
  • the TRP2 sends one DCI to schedule the transmission of PDSCH 2 to
  • the UE reports HARQ-ACK for both PDSCH 1 and PDSCH2 to the TRP, which is different from the HARQ-ACK reporting in the example illustrated in FIG. 1A.
  • the example illustrated in FIG. 1B needs ideal backhaul between the TRP 1 and the TRP 2, while the example illustrated in FIG. 1A can be deployed in the scenarios that the backhaul between the TRP 1 and the TRP 2 is ideal or non-ideal.
  • a higher layer parameter CORSETPoolIndex is used to differentiate whether multi-TRP transmission is supported in one serving cell or not.
  • CORESETs in that serving cell would be configured with one of two different values for the higher layer parameter CORESETPoolIndex.
  • BWP bandwidth part
  • the UE is provided with higher layer parameter CORESETPoolIndex with a value of 0 or not provided with higher layer parameter for some CORESETs and is provided with higher layer parameter CORESETPoolIndex with a value of 1 for other CORESET (s) , then multi-TRP transmission is supported for that UE in the BWP of the serving cell.
  • the UE can derive a default spatial relation information for the transmission of PUCCH or SRS.
  • the default spatial relation information is: If there is CORESET configured in the DL BWP in the CC, the UE can transmit the SRS resource with the same spatial domain transmission filter used for the reception of the CORESET with the lowest controlResourceSetId in the active DL BWP in the CC. If the UE is not configured with any CORESET in the CC, the UE can transmit the SRS resource with the same spatial domain transmission filter used for the reception of the activated TCI state with the lowest ID applicable to PDSCH in the active DL BWP of the CC.
  • the default spatial relation information is that: the UE transmits the PUCCH resource with a spatial setting for a PUCCH transmission from the UE is same as a spatial setting for PDCCH receptions by the UE in the CORESET with the lowest ID on the active DL BWP of the CC.
  • Default spatial relation for PUSCH scheduled by DCI 0_0 is also specified: For PUSCH scheduled by DCI format 0_0 on a cell and if the higher layer parameter enableDefaultBeamPlForPUSCH0_0 is set 'enabled' , the UE is not configured with PUCCH resources on the active UL BWP and the UE is in RRC connected mode, the UE can transmit PUSCH according to the spatial relation, if applicable, with a reference to the RS with 'QCL-Type-D' corresponding to the QCL assumption of the CORESET with the lowest ID.
  • the UE For PUSCH scheduled by DCI format 0_0 on a cell and if the higher layer parameter enableDefaultBeamPlForPUSCH0_0 is set 'enabled' , the UE is configured with PUCCH resources on the active UL BWP where all the PUCCH resource (s) are not configured with any spatial relation and the UE is in RRC connected mode, the UE can transmit PUSCH according to the spatial relation, if applicable, with a reference to the RS with 'QCL-Type-D' corresponding to the QCL assumption of the CORESET with the lowest ID in case CORESET (s) are configured on the CC.
  • the default pathloss RS for PUCCH, SRS and PUSCH, some embodiments have the following methods:
  • SRS the default pathloss RS is the periodic RS resource with 'QCL-TypeD' in the TCI state or the QCL assumption of a CORESET with the lowest index, if CORESETs are provided in the active DL BWP and the active PDSCH TCI state with lowest ID, if CORESETs are not provided in the active DL BWP of the CC.
  • the default pathloss RS is periodic RS resource with 'QCL-TypeD' in the TCI state or the QCL assumption of a CORESET with the lowest index in the active DL BWP of the CC.
  • the default pathloss RS is determined as: If there is no PUCCH resource configured, the default pathloss RS is periodic RS resource with 'QCL-TypeD' in the TCI state or the QCL assumption of a CORESET with the lowest index in the active DL BWP of the scheduling cell for the serving cell. If there is PUCCH resource configured but the PUCCH resource is not configured with spatial relation info, the default pathloss RS is a periodic RS resource with 'QCL-TypeD' in the TCI state or the QCL assumption of a CORESET with the lowest index in the active DL BWP of the CC.
  • FIG. 2 illustrates that, in some embodiments, one or more user equipments (UEs) 10 and a base station (e.g., gNB or eNB) 20 for transmission adjustment in a communication network system 30 according to an embodiment of the present disclosure are provided.
  • the communication network system 30 includes the one or more UEs 10 and the base station 20.
  • the one or more UEs 10 may include a memory 12, a transceiver 13, and a processor 11 coupled to the memory 12 and the transceiver 13.
  • the base station 20 may include a memory 22, a transceiver 23, and a processor 21 coupled to the memory 22 and the transceiver 23.
  • the processor 11 or 21 may be configured to implement proposed functions, procedures and/or methods described in this description.
  • Layers of radio interface protocol may be implemented in the processor 11 or 21.
  • the memory 12 or 22 is operatively coupled with the processor 11 or 21 and stores a variety of information to operate the processor 11 or 21.
  • the transceiver 13 or 23 is operatively coupled with the processor 11 or 21, and the transceiver 13 or 23 transmits and/or receives a radio signal.
  • the processor 11 or 21 may include application-specific integrated circuit (ASIC) , other chipset, logic circuit and/or data processing device.
  • the memory 12 or 22 may include read-only memory (ROM) , random access memory (RAM) , flash memory, memory card, storage medium and/or other storage device.
  • the transceiver 13 or 23 may include baseband circuitry to process radio frequency signals.
  • modules e.g., procedures, functions, and so on
  • the modules can be stored in the memory 12 or 22 and executed by the processor 11 or 21.
  • the memory 12 or 22 can be implemented within the processor 11 or 21 or external to the processor 11 or 21 in which case those can be communicatively coupled to the processor 11 or 21 via various means as is known in the art.
  • the processor 11 is configured to be scheduled, by the base station 20, with an uplink channel.
  • the processor 11 is configured to determine a spatial relation and a pathloss reference signal (RS) for the uplink channel, wherein when the uplink channel comprises a physical uplink shared channel (PUSCH) , a default spatial relation and a default pathloss RS can be an RS with quasi co-location (QCL) -Type-D corresponding to a QCL assumption of a control resource set (CORESET) with a lowest identifier (ID) .
  • QCL quasi co-location
  • CORESET control resource set
  • ID lowest identifier
  • the processor 21 is configured to schedule, to the user equipment (UE) 10, an uplink channel.
  • the processor 21 is configured to determine a spatial relation and a pathloss reference signal (RS) for the uplink channel, wherein when the uplink channel comprises a physical uplink shared channel (PUSCH) , a default spatial relation and a default pathloss RS can be an RS with quasi co-location (QCL) -Type-D corresponding to a QCL assumption of a control resource set (CORESET) with a lowest identifier (ID) .
  • QCL quasi co-location
  • CORESET control resource set
  • ID lowest identifier
  • FIG. 3 illustrates a method 200 of wireless communication by a user equipment (UE) 10 according to an embodiment of the present disclosure.
  • the method 200 includes: a block 202, being scheduled, by a base station, with an uplink channel, and a block 204, determining a spatial relation and a pathloss reference signal (RS) for the uplink channel, wherein when the uplink channel comprises a physical uplink shared channel (PUSCH) , a default spatial relation and a default pathloss RS can be an RS with quasi co-location (QCL) -Type-D corresponding to a QCL assumption of a control resource set (CORESET) with a lowest identifier (ID) .
  • QCL quasi co-location
  • CORESET control resource set
  • ID lowest identifier
  • FIG. 4 illustrates a method 300 of wireless communication by a base station 20 according to an embodiment of the present disclosure.
  • the method 300 includes: a block 302, scheduling, to a user equipment (UE) , an uplink channel, and a block 304, determining a spatial relation and a pathloss reference signal (RS) for the uplink channel, wherein when the uplink channel comprises a physical uplink shared channel (PUSCH) , a default spatial relation and a default pathloss RS can be an RS with quasi co-location (QCL) -Type-D corresponding to a QCL assumption of a control resource set (CORESET) with a lowest identifier (ID) .
  • QCL quasi co-location
  • CORESET control resource set
  • ID lowest identifier
  • the PUSCH is scheduled by a downlink control information (DCI) format 0_0, and in a single-DCI based multi-transmission/reception point (TRP) system, the default spatial relation and the default pathloss RS can be the RS with the QCL-Type-D corresponding to the QCL assumption of the CORESET with the lowest ID.
  • DCI downlink control information
  • TRP transmission/reception point
  • the default spatial relation and the default pathloss RS can be the RS with the QCL-Type-D corresponding to the QCL assumption of the CORESET with the lowest ID among CORESETs of a scheduling TRP.
  • a default spatial relation can be same as a spatial setting for PDCCH receptions by the UE in the CORESET with the lowest ID on an active downlink (DL) bandwidth part (BWP) of the CC and a default pathloss RS is a periodic RS resource with the QCL-Type-D in a TCI state or the QCL assumption of the CORESET with a lowest index in the active DL BWP of the component carrier (CC) .
  • DL downlink
  • BWP bandwidth part
  • a default spatial relation and a default pathloss RS can be the RS with the QCL-Type-D corresponding to the QCL assumption of the CORESET with the lowest ID among CORESETs of a scheduling TRP.
  • a default spatial relation and a default pathloss RS is a QCL-type-D RS of the QCL assumption of the CORESET with the lowest ID among CORESETs of a first TRP.
  • a default spatial relation and a default pathloss RS can be the same to a QCL-Type-D RS in a TCI state or the QCL assumption of the CORESET with the lowest ID on an active DL BWP of a CC.
  • a default spatial relation and a default pathloss RS is the same to a QCL-Type-D RS in an active physical downlink shared channel (PDSCH) TCI state with a lowest ID.
  • PDSCH physical downlink shared channel
  • a default spatial relation and a default pathloss RS can be the RS with the QCL-Type-D corresponding to the QCL assumption of the CORESET with the lowest ID among CORESETs of a scheduling TRP.
  • a default spatial relation and a default pathloss RS can be a QCL-type-D RS of the QCL assumption of the CORESET with the lowest ID among CORESETs of a first TRP.
  • Component 1 PUSCH of DCI 0_0:
  • the UE can transmit the PUSCH according to a spatial relation with a reference to the RS of QCL-TypeD in the TCI-state or QCL assumption of the CORESET with the lowest ID of corresponding TRP.
  • the UE can transmit the PUSCH according to a spatial relation with a reference to the RS of QCL-TypeD in the TCI-state or QCL assumption of the CORESET with the lowest ID of corresponding TRP.
  • the default spatial relation info can be the QCL-TypeD RS of the TCI-state or QCL assumption of the CORESET with lowest ID of all CORESETs with the same CORESETPoolIndex as the PDCCH scheduling that PUSCH transmission.
  • the default spatial relation info can be the QCL-TypeD RS of the TCI-state or QCL assumption of the CORESET with lowest ID.
  • the UE can apply the same method to derive the default pathloss RS.
  • the UE can transmit PUSCH according to the spatial relation, if applicable, with a reference to the RS with ‘QCL-TypeD’ corresponding to the QCL assumption of the CORESET with the lowest ID on the active DL BWP of the cell.
  • the UE can transmit PUSCH according to the spatial relation, if applicable, with a reference to the RS with ‘QCL-TypeD’ corresponding to the QCL assumption of the CORESET with the lowest ID on the active DL BWP of the cell in case CORESET (s) are configured on the cell.
  • the UE can transmit PUSCH according to the spatial relation, if applicable, with a reference to the RS with ‘QCL-TypeD’ corresponding to the QCL assumption of the CORESET with the lowest ID among CORESETs, which are configured with the same value of CORESETPoolIndex as the PDCCH scheduling that PUSCH on the active DL BWP of the cell.
  • the UE can transmit PUSCH according to the spatial relation, if applicable, with a reference to the RS with ‘QCL-TypeD’ corresponding to the QCL assumption of the CORESET with the lowest ID among CORESETs, which are configured with the same value of CORESETPoolIndex as the PDCCH scheduling that PUSCH on the active DL BWP of the cell in case CORESET (s) are configured on the CC.
  • the UE can determine the pathloss RS q d for a PUSCH scheduled by DCI format 0_0 as follows: If the PUSCH transmission is scheduled by a DCI format 0_0, the UE is not provided PUCCH resources for the active UL BWP, and the UE is provided enableDefaultBeamPlForPUSCH0_0 and if the UE is provided at least one TCI codepoint mapped with two TCI states, the UE determines a RS resource index q d providing a periodic RS resource with 'QCL-TypeD' in the TCI state or the QCL assumption of a CORESET with the lowest index in the active DL BWP of the scheduling cell for the serving cell.
  • the UE determines a RS resource index q d providing a periodic RS resource with 'QCL-TypeD' in the TCI state or the QCL assumption of a CORESET with the lowest index in the active DL BWP of the scheduling cell for the serving cell.
  • the UE can determine the pathloss RS q d for a PUSCH scheduled by DCI format 0_0 as follows: If the PUSCH transmission is scheduled by a DCI format 0_0, the UE is not provided PUCCH resources for the active UL BWP, and the UE is provided enableDefaultBeamPlForPUSCH0_0 and if the UE is configured by higher layer parameter PDCCH-Config that contains two different values of CORESETPoolIndex in ControlResourceSet, the UE determines a RS resource index q d providing a periodic RS resource with 'QCL-TypeD' in the TCI state or the QCL assumption of a CORESET with the lowest index, among CORESETs, which are configured with the same value of CORESETPoolIndex as the PDCCH scheduling that PUSCH in the active DL BWP of the scheduling cell for the serving cell.
  • the UE determines a RS resource index q d providing a periodic RS resource with 'QCL-TypeD' in the TCI state or the QCL assumption of a CORESET with the lowest index among CORESETs, which are configured with the same value of CORESETPoolIndex as the PDCCH scheduling that PUSCH in the active DL BWP of the scheduling cell for the serving cell.
  • Component 2 PUCCH:
  • the UE can determine a default spatial relation setting and default pathloss RS for the PUCCH resource according one or more of the followings:
  • the default spatial relation for the PUCCH resource can be the QCL-TypeD RS of TCI-state or QCL assumption for PDCCH reception in the CORESET with the lowest ID on the active BWP of the CC.
  • the default pathloss RS for the PUCCH resource can be the QCL-TypeD RS of TCI-state or QCL assumption for PDCCH reception in the CORESET with the lowest ID on the active BWP of the CC.
  • the default spatial relation for a PUCCH resource can be the QCL-TypeD RS of TCI-state or QCL assumption for PDCCH reception in the CORESET with the lowest ID among all the CORESETs associated with the TRP that is associated with the PUCCH resource.
  • the UE can determine a PUCCH resource is associated with a first TRP if the PUCCH resource transmission is triggered by a DCI that is sent from the first TRP.
  • a higher layer parameter can be configured for a PUCCH transmission to indicate the association between the TRP and a PUCCH transmission.
  • the default pathloss RS for a PUCCH resource can be the QCL-TypeD RS of TCI-state or QCL assumption for PDCCH reception in the CORESET with the lowest ID among all the CORESETs associated with the TRP that is associated with the PUCCH resource.
  • a spatial setting for a PUCCH transmission from the UE is same as a spatial setting for PDCCH receptions by the UE in the CORESET with the lowest ID on the active DL BWP of the PCell.
  • the UE determines a RS resource index q d providing a periodic RS resource with 'QCL-TypeD' in the TCI state or the QCL assumption of a CORESET with the lowest index in the active DL BWP of the primary cell.
  • a UE is not provided pathlossReferenceRSs in PUCCH-PowerControl, is provided enableDefaultBeamPlForPUCCH, and is not provided PUCCH-SpatialRelationInfo, and if the UE is configured by higher layer parameter PDCCH-Config that contains two different values of CORESETPoolIndex in ControlResourceSet,
  • a spatial setting for a PUCCH transmission from the UE is same as a spatial setting for PDCCH receptions by the UE in the CORESET with the lowest ID among CORESETs, which are configured with the same value of CORESETPoolIndex as the PDCCH triggering that PUCCH in the active DL BWP of the scheduling cell for the serving cell.
  • a spatial setting for a PUCCH transmission from the UE is same as a spatial setting for PDCCH receptions by the UE in the CORESET with the lowest ID among CORESETs, which are configured with the same value of CORESETPoolIndex associated with that PUCCH transmission in the active DL BWP of the scheduling cell for the serving cell.
  • the UE is not provided pathlossReferenceRSs, and is not provided PUCCH-SpatialRelationInfo, and is provided enableDefaultBeamPlForPUCCH and if the UE is configured by higher layer parameter PDCCH-Config that contains two different values of CORESETPoolIndex in ControlResourceSet.
  • the UE determines a RS resource index q d providing a periodic RS resource with 'QCL-TypeD' in the TCI state or the QCL assumption of a CORESET with the lowest index among CORESETs, which are configured with the same value of CORESETPoolIndex as the PDCCH triggering that PUCCH in the active DL BWP of the scheduling cell for the serving cell.
  • the UE determines a RS resource index q d providing a periodic RS resource with 'QCL-TypeD' in the TCI state or the QCL assumption of a CORESET with the lowest index among CORESETs, which are configured with the same value of CORESETPoolIndex associated with that PUCCH transmission in the active DL BWP of the scheduling cell for the serving cell.
  • the UE can determine a default spatial relation setting and default pathloss RS for the SRS resource according one or more of the followings:
  • the default spatial relation for the SRS resource can be the QCL-TypeD RS of TCI-state or QCL assumption for PDCCH reception in the CORESET with the lowest ID on the active BWP of the CC and if there is CORESET configured, the default spatial relation is QCL-TypeD RS in the activated TCI state with the lowest ID applicable to PDSCH.
  • the default pathloss RS for the SRS resource can same to the QCL-TypeD RS used as default spatial relation for the SRS resource.
  • the default spatial relation for a SRS resource can be the QCL-TypeD RS of TCI-state or QCL assumption for PDCCH reception in the CORESET with the lowest ID among all the CORESETs associated with the TRP that is associated with the SRS resource and if there is no CORESET configured, the default spatial relation for a SRS resource can be the QCL-TypeD RS of the active TCI state with lowest ID associated with the TRP that is associated with the SRS resource.
  • the UE can determine a PUCCH resource is associated with a first TRP if the SRS resource transmission is triggered by a DCI that is sent from the first TRP.
  • a higher layer parameter can be configured for a SRS transmission to indicate the association between the TRP and a SRS transmission.
  • the default pathloss RS for a SRS resource can be the QCL-TypeD RS of TCI-state or QCL assumption for PDCCH reception in the CORESET with the lowest ID among all the CORESETs associated with the TRP that is associated with the SRS resource or the QCL-TypeD RS of the active TCI state with lowest ID associated with the TRP that is associated with the SRS transmission.
  • the UE can transmit the target SRS resource.
  • the higher layer parameter enableDefaultBeamPlForSRS is set 'enabled'
  • the higher layer parameter spatialRelationInfo for the SRS resource except for the SRS resource with the higher layer parameter usage in SRS-ResourceSet set to 'beamManagement' or for the SRS resource with the higher layer parameter usage in SRS-ResourceSet set to 'nonCodebook' with configuration of associatedCSI-RS or for the SRS resource configured by the higher layer parameter [SRS-for-positioning] , is not configured in FR2 and if the UE is not configured with higher layer parameter (s) pathlossReferenceRS, and if the UE is provided at least one TCI codepoint mapped with two TCI states, the UE can transmit the target SRS resource.
  • the UE determines a RS resource index q d providing a periodic RS resource with 'QCL-TypeD' in the TCI state or the QCL assumption of a CORESET with the lowest index, if CORESETs are provided in the active DL BWP or the active PDSCH TCI state with lowest ID, if CORESETs are not provided in the active DL BWP.
  • a SRS transmission when the higher layer parameter enableDefaultBeamPlForSRS is set 'enabled' , and if the higher layer parameter spatialRelationInfo for the SRS resource, except for the SRS resource with the higher layer parameter usage in SRS-ResourceSet set to 'beamManagement' or for the SRS resource with the higher layer parameter usage in SRS-ResourceSet set to 'nonCodebook' with configuration of associatedCSI-RS or for the SRS resource configured by the higher layer parameter [SRS-for-positioning] , is not configured in FR2 and if the UE is not configured with higher layer parameter (s) pathlossReferenceRS, and if the UE is configured by higher layer parameter PDCCH-Config that contains two different values of CORESETPoolIndex in ControlResourceSet,
  • the UE can transmit the target SRS resource with the same spatial domain transmission filter used for the reception of the CORESET with the lowest controlResourceSetId among CORESETs, which are configured with the same value of CORESETPoolIndex as the PDCCH triggering SRS transmission in the active DL BWP of the scheduling cell for the serving cell, and the UE can transmit the target SRS resource with the same spatial domain transmission filter used for the reception of the activated TCI state with the lowest ID applicable to PDSCH associated with the same value of CORESETPoolIndex as the PDCCH triggering SRS transmission in the active DL BWP of the CC if the UE is not configured with any CORESET in the CC.
  • the UE can transmit the target SRS resource with the same spatial domain transmission filter used for the reception of the CORESET with the lowest controlResourceSetId among CORESETs, which are configured with the same value of CORESETPoolIndex that is associated with SRS transmission in the active DL BWP of the scheduling cell for the serving cell, and the UE can transmit the target SRS resource with the same spatial domain transmission filter used for the reception of the activated TCI state with the lowest ID applicable to PDSCH associated with the same value of CORESETPoolIndex that is associated with the SRS transmission in the active DL BWP of the CC if the UE is not configured with any CORESET in the CC.
  • a pathloss RS q d for an SRS transmission if the UE is not provided pathlossReferenceRS or SRS-PathlossReferenceRS, is not provided spatialRelationInfo, and is provided enableDefaultBeamPlForSRS and if the UE is configured by higher layer parameter PDCCH-Config that contains two different values of CORESETPoolIndex in ControlResourceSet.
  • the UE determines a RS resource index q d providing a periodic RS resource with 'QCL-TypeD' in the TCI state or QCL assumption of a CORESET with the lowest controlResourceSetId among CORESETs, which are configured with the same value of CORESETPoolIndex as the PDCCH triggering SRS transmission in the active DL BWP of the scheduling cell for the serving cell, and the UE determines a RS resource index q d providing a periodic RS resource with 'QCL-TypeD' in the activated TCI state with the lowest ID applicable to PDSCH associated with the same value of CORESETPoolIndex as the PDCCH triggering SRS transmission in the active DL BWP of the CC if the UE is not configured with any CORESET in the CC.
  • the UE determines a RS resource index q d providing a periodic RS resource with 'QCL-TypeD' in the TCI state or QCL assumption of a CORESET with the lowest controlResourceSetId among CORESETs, which are configured with the same value of CORESETPoolIndex that is associated with SRS transmission in the active DL BWP of the scheduling cell for the serving cell, and the UE determines a RS resource index q d providing a periodic RS resource with 'QCL-TypeD' in the activated TCI state with the lowest ID applicable to PDSCH associated with the same value of CORESETPoolIndex that is associated with the SRS transmission in the active DL BWP of the CC if the UE is not configured with any CORESET in the CC.
  • the methods for determining spatial relation and pathloss RS for PUCCH, SRS, and PUSCH of DCI 0_0 is presented.
  • the default spatial relation info and pathloss RS can be: 1.
  • the default spatial relation info and the default pathloss RS can be the RS with 'QCL-Type-D' corresponding to the QCL assumption of the CORESET with the lowest ID. 2.
  • the default spatial relation and the default pathloss RS can be the RS with 'QCL-Type-D' corresponding to the QCL assumption of the CORESET with the lowest ID among all the CORESETs of the scheduling TRP.
  • the default spatial relation info and default pathloss RS can be: 1.
  • the default spatial relation info can be same as a spatial setting for PDCCH receptions by the UE in the CORESET with the lowest ID on the active DL BWP of the CC and the default pathloss RS is periodic RS resource with 'QCL-TypeD' in the TCI state or the QCL assumption of a CORESET with the lowest index in the active DL BWP of the CC.
  • the default spatial relation and default pathloss RS can be the RS with 'QCL-Type-D' corresponding to the QCL assumption of the CORESET with the lowest ID among all the CORESETs of the scheduling TRP.
  • the default spatial relation and default pathloss RS is the QCL-typeD RS of the QCL assumption of the CORESET with the lowest ID among all the CORESETs of the first TRP.
  • the default spatial relation info and default pathloss RS can be: 1.
  • the default spatial relation info and default pathloss RS can be same to the QCL-TypeD RS in the TCI state or QCL assumption of the CORESET with the lowest ID on the active DL BWP of the CC. If there is no CORESET configured, the default spatial relation info and default pathloss RS is the same to the QCL-TypeD RS in the active PDSCH TCI state with lowest ID. 2.
  • the default spatial relation and default pathloss RS can be the RS with 'QCL-Type-D' corresponding to the QCL assumption of the CORESET with the lowest ID among all the CORESETs of the scheduling TRP.
  • the default spatial relation and default pathloss RS is the QCL-typeD RS of the QCL assumption of the CORESET with the lowest ID among all the CORESETs of the first TRP.
  • 3GPP TS 38.211 V16.1.0 “NR; Physical channels and modulation”
  • 3GPP TS 38.212 V16.1.0 “NR; Multiplexing and channel coding”
  • 3GPP TS 38.213 V16.1.0 “NR; Physical layer procedures for control”
  • 3GPP TS 38.214 V16.1.0 “NR; Physical layer procedures for data”
  • 3GPP TS 38.215 V16.1.0 “NR; Physical layer measurements”
  • 3GPP TS 38.321 V16.1.0 “NR; Medium Access Control (MAC) protocol specification”
  • RRC Radio Resource Control
  • CSI Channel state information CSI-RS Channel state information reference signal RS Reference Signal
  • CORESET Control Resource Set DCI Downlink control information
  • TRP Transmission/reception point ACK Acknowledge NACK Non-Acknowledge UCI Uplink control information
  • RRC Radio Resource Control HARQ Hybrid Automatic Repeat Request MAC
  • Media Access Control MAC CE
  • CRC Cyclic Redundancy Check RNTI Radio Network Temporary Identity RB Resource Block PRB Physical Resource Block NW Network RSRP Reference signal received power L1-RSRP Layer 1 Reference signal received power
  • TCI Transmission Configuration Indicator Tx Transmission Rx Receive QCL Quasi co-location SSB SS/PBCH Block SRI SRS resource indicator
  • Some embodiments of the present disclosure are used by 5G-NR chipset vendors, V2X communication system development vendors, automakers including cars, trains, trucks, buses, bicycles, moto-bikes, helmets, and etc., drones (unmanned aerial vehicles) , smartphone makers, communication devices for public safety use, AR/VR device maker for example gaming, conference/seminar, education purposes.
  • the deployment scenarios include, but not limited to, indoor hotspot, dense urban, urban micro, urban macro, rural, factor hall, and indoor D2D scenarios.
  • Some embodiments of the present disclosure are a combination of “techniques/processes” that can be adopted in 3GPP specification to create an end product. Some embodiments of the present disclosure could be adopted in 5G NR licensed and non-licensed or shared spectrum communications. Some embodiments of the present disclosure propose technical mechanisms. The present example embodiment is applicable to NR in unlicensed spectrum (NR-U) . The present disclosure can be applied to other mobile networks, in particular to mobile network of any further generation cellular network technology (6G, etc. ) .
  • FIG. 5 is a block diagram of an example system 700 for wireless communication according to an embodiment of the present disclosure. Embodiments described herein may be implemented into the system using any suitably configured hardware and/or software.
  • FIG. 5 illustrates the system 700 including a radio frequency (RF) circuitry 710, a baseband circuitry 720, an application circuitry 730, a memory/storage 740, a display 750, a camera 760, a sensor 770, and an input/output (I/O) interface 780, coupled with each other at least as illustrated.
  • the application circuitry 730 may include a circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the processors may include any combination of general-purpose processors and dedicated processors, such as graphics processors, application processors.
  • the processors may be coupled with the memory/storage and configured to execute instructions stored in the memory/storage to enable various applications and/or operating systems running on the system.
  • the baseband circuitry 720 may include circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the processors may include a baseband processor.
  • the baseband circuitry may handle various radio control functions that enables communication with one or more radio networks via the RF circuitry.
  • the radio control functions may include, but are not limited to, signal modulation, encoding, decoding, radio frequency shifting, etc.
  • the baseband circuitry may provide for communication compatible with one or more radio technologies.
  • the baseband circuitry may support communication with an evolved universal terrestrial radio access network (EUTRAN) and/or other wireless metropolitan area networks (WMAN) , a wireless local area network (WLAN) , a wireless personal area network (WPAN) .
  • EUTRAN evolved universal terrestrial radio access network
  • WMAN wireless metropolitan area networks
  • WLAN wireless local area network
  • WPAN wireless personal area network
  • Embodiments in which the baseband circuitry is configured to support radio communications of more than one wireless protocol may be referred to as
  • the baseband circuitry 720 may include circuitry to operate with signals that are not strictly considered as being in a baseband frequency.
  • baseband circuitry may include circuitry to operate with signals having an intermediate frequency, which is between a baseband frequency and a radio frequency.
  • the RF circuitry 710 may enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium.
  • the RF circuitry may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network.
  • the RF circuitry 710 may include circuitry to operate with signals that are not strictly considered as being in a radio frequency.
  • RF circuitry may include circuitry to operate with signals having an intermediate frequency, which is between a baseband frequency and a radio frequency.
  • the transmitter circuitry, control circuitry, or receiver circuitry discussed above with respect to the user equipment, eNB, or gNB may be embodied in whole or in part in one or more of the RF circuitry, the baseband circuitry, and/or the application circuitry.
  • “circuitry” may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC) , an electronic circuit, a processor (shared, dedicated, or group) , and/or a memory (shared, dedicated, or group) that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable hardware components that provide the described functionality.
  • ASIC Application Specific Integrated Circuit
  • the electronic device circuitry may be implemented in, or functions associated with the circuitry may be implemented by, one or more software or firmware modules.
  • some or all of the constituent components of the baseband circuitry, the application circuitry, and/or the memory/storage may be implemented together on a system on a chip (SOC) .
  • SOC system on a chip
  • the memory/storage 740 may be used to load and store data and/or instructions, for example, for system.
  • the memory/storage for one embodiment may include any combination of suitable volatile memory, such as dynamic random access memory (DRAM) ) , and/or non-volatile memory, such as flash memory.
  • DRAM dynamic random access memory
  • the I/O interface 780 may include one or more user interfaces designed to enable user interaction with the system and/or peripheral component interfaces designed to enable peripheral component interaction with the system.
  • User interfaces may include, but are not limited to a physical keyboard or keypad, a touchpad, a speaker, a microphone, etc.
  • Peripheral component interfaces may include, but are not limited to, a non-volatile memory port, a universal serial bus (USB) port, an audio jack, and a power supply interface.
  • the sensor 770 may include one or more sensing devices to determine environmental conditions and/or location information related to the system.
  • the sensors may include, but are not limited to, a gyro sensor, an accelerometer, a proximity sensor, an ambient light sensor, and a positioning unit.
  • the positioning unit may also be part of, or interact with, the baseband circuitry and/or RF circuitry to communicate with components of a positioning network, e.g., a global positioning system (GPS) satellite.
  • GPS global positioning system
  • the display 750 may include a display, such as a liquid crystal display and a touch screen display.
  • the system 700 may be a mobile computing device such as, but not limited to, a laptop computing device, a tablet computing device, a netbook, an ultrabook, a smartphone, an AR/VR glasses, etc.
  • system may have more or less components, and/or different architectures.
  • methods described herein may be implemented as a computer program.
  • the computer program may be stored on a storage medium, such as a non-transitory storage medium.
  • the units as separating components for explanation are or are not physically separated.
  • the units for display are or are not physical units, that is, located in one place or distributed on a plurality of network units. Some or all of the units are used according to the purposes of the embodiments.
  • each of the functional units in each of the embodiments can be integrated in one processing unit, physically independent, or integrated in one processing unit with two or more than two units.
  • the software function unit is realized and used and sold as a product, it can be stored in a readable storage medium in a computer.
  • the technical plan proposed by the present disclosure can be essentially or partially realized as the form of a software product.
  • one part of the technical plan beneficial to the conventional technology can be realized as the form of a software product.
  • the software product in the computer is stored in a storage medium, including a plurality of commands for a computational device (such as a personal computer, a server, or a network device) to run all or some of the steps disclosed by the embodiments of the present disclosure.
  • the storage medium includes a USB disk, a mobile hard disk, a read-only memory (ROM) , a random access memory (RAM) , a floppy disk, or other kinds of media capable of storing program codes.

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

Abstract

L'invention concerne un appareil et un procédé de communication sans fil. Le procédé exécuté par un équipement utilisateur (UE) consiste à : être planifié, au moyen d'une station de base, avec un canal de liaison montante, puis déterminer une relation spatiale et un signal de référence (RS) à affaiblissement de trajet pour le canal de liaison montante. Lorsque le canal de liaison montante comprend un canal partagé de liaison montante physique (PUSCH), une relation spatiale par défaut et un RS à affaiblissement de trajet par défaut peuvent être un RS avec un type D de quasi-localisation (QCL) correspondant à une hypothèse QCL d'un ensemble de ressources de commande (CORESET) avec un identifiant (ID) inférieur. Cela permet de résoudre des problèmes dans l'état de la technique, d'utiliser une réception à multiples points de transmission/réception (TRP), d'améliorer la fiabilité en liaison montante, de fournir une bonne performance de communication et/ou de fournir une grande fiabilité.
PCT/CN2021/093636 2020-05-13 2021-05-13 Appareil et procédé de communication sans fil WO2021228201A1 (fr)

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Citations (2)

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US20190372806A1 (en) * 2017-05-04 2019-12-05 Lg Electronics Inc. Method and apparatus for uplink transmission and reception in a wireless communication system
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