WO2021012977A1 - Équipement utilisateur et procédé d'émission de canal partagé de liaison montante physique de repli - Google Patents

Équipement utilisateur et procédé d'émission de canal partagé de liaison montante physique de repli Download PDF

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Publication number
WO2021012977A1
WO2021012977A1 PCT/CN2020/101678 CN2020101678W WO2021012977A1 WO 2021012977 A1 WO2021012977 A1 WO 2021012977A1 CN 2020101678 W CN2020101678 W CN 2020101678W WO 2021012977 A1 WO2021012977 A1 WO 2021012977A1
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Prior art keywords
pucch
transmission
pusch
spatial relation
processor
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PCT/CN2020/101678
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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.
Priority to CN202080053017.7A priority Critical patent/CN114145063A/zh
Publication of WO2021012977A1 publication Critical patent/WO2021012977A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/088—Hybrid systems, i.e. switching and combining using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • 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

Definitions

  • the present disclosure relates to the field of communication systems, and more particularly, to a user equipment (UE) and a method of a fallback physical uplink shared channel (PUSCH) transmission.
  • UE user equipment
  • PUSCH physical uplink shared channel
  • a transmit (Tx) beam determination method for a physical uplink shared channel (PUSCH) scheduled by a downlink control information (DCI) format including a DCI format 0_0 does not work with respect to a new design of Tx beam indication for physical uplink control channel (PUCCH) resources.
  • the current design of Tx beam indication for the PUSCH scheduled by the DCI format 0_0 does not work for multi-transmission and receiving points (TRP) case.
  • UE user equipment
  • PUSCH physical uplink shared channel
  • An object of the present disclosure is to propose a user equipment (UE) and a method of a fallback physical uplink shared channel (PUSCH) transmission capable of providing high reliability, low-overhead and low-latency signaling for supporting a downlink control information (DCI) format based physical uplink shared channel (PUSCH) transmission in a multi-transmission and receiving points (TRP) system.
  • UE user equipment
  • PUSCH physical uplink shared channel
  • a method of a fallback physical uplink shared channel (PUSCH) transmission of a user equipment (UE) includes being configured or indicated a first transmit (Tx) beam and a second transmit (Tx) beam by a base station (BS) , wherein the first Tx beam and the second Tx beam are configured to be used for a transmission over a physical uplink control channel (PUCCH) , and applying the first Tx beam on a transmission on a PUCCH resource in the first group of PUCCH resources and applying the second Tx beam on a transmission on a PUCCH resource in the second group of PUCCH resources.
  • PUCCH physical uplink control channel
  • a user equipment (UE) of a fallback physical uplink shared channel (PUSCH) transmission includes a memory, a transceiver, and a processor coupled to the memory and the transceiver.
  • the processor is configured to be configured or indicated with a first transmit (Tx) beam and a second transmit (Tx) beam by a base station (BS) , wherein the first Tx beam and the second Tx beam are configured to be used for a transmission over a physical uplink control channel (PUCCH) , and apply the first Tx beam on a transmission on a PUCCH resource in the first group of PUCCH resources and apply the second Tx beam on a transmission on a PUCCH resource in the second group of PUCCH resources.
  • PUCCH physical uplink control channel
  • 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. 1 illustrates a transmitter block diagram for a downlink (DL) or uplink (UL) transmission.
  • FIG. 2 illustrates a receiver block diagram for receiving a DL or UL transmission.
  • FIG. 3 is a block diagram of a user equipment (UE) and a base station of a fallback physical uplink shared channel (PUSCH) transmission according to an embodiment of the present disclosure.
  • UE user equipment
  • PUSCH physical uplink shared channel
  • FIG. 4 is a flowchart illustrating a method of a fallback physical uplink shared channel (PUSCH) transmission of a UE according to an embodiment of the present disclosure.
  • PUSCH physical uplink shared channel
  • FIG. 5 is a flowchart illustrating a method for determining a spatial relation for transmission of PUSCH scheduled by a downlink control information (DCI) format including a DCI format 0_0 according to an embodiment of the present disclosure.
  • DCI downlink control information
  • FIG. 6 is a block diagram of a system for wireless communication according to an embodiment of the present disclosure.
  • Fifth-generation (5G) wireless systems are generally a multi-beam based system in a frequency range 2 (FR2) ranging from 24.25 GHz to 52.6 GHz, where multiplex transmit (Tx) and receive (Rx) analog beams are employed by a base station (BS) and/or a user equipment (UE) to combat a large path loss in a high frequency band.
  • a base station for example, mmWave systems
  • the BS and the UE are deployed with large number of antennas, so that a large gain beamforming can be used to defeat the large path loss and signal blockage.
  • TXRUs transmission and reception units
  • hybrid beamforming mechanisms can be utilized in both BS and UE.
  • the BS and the UE need to align analog beam directions for a particular downlink or uplink transmission.
  • the BS and the UE need to find the best pair of a BS Tx beam and a UE Rx beam while for an uplink transmission, the BS and the UE need to find the best pair of the UE Tx beam and the BS Rx beam.
  • the BS and the UE For a communication between one UE and a BS, the BS and the UE need to determine which Tx and Rx beam are going to be used. When one UE moves, the beams used by the BS and the UE for communication might change. In 3GPP 5G specification, the following functions are defined to support such multi-beam-based operation.
  • the UE can measure one or multiple Tx beams of the BS and then the UE can select the best Tx beam and report his selection to the BS.
  • the UE can also measure one or more different Rx beams and then select the best Rx beam for one particular Tx beam of the BS.
  • the gNB can also measure one or multiple Tx beams of the UE and then select the best Tx beam of the UE for an uplink transmission.
  • the BS can transmit multiple reference signal (RS) resources and then configures the UE to measure the RS resources.
  • RS reference signal
  • the UE can report an index of one or more selected RS resources that are selected based on some measure metric, for example, a layer 1 reference signal received power (L1-RSRP) .
  • L1-RSRP layer 1 reference signal received power
  • the BS can configure the UE to transmit one or more uplink RS resources, for example, sounding reference signal (SRS) resources, and then the BS can measure the RS resources.
  • SRS sounding reference signal
  • the BS can figure out which Tx beam of the UE is the best for the uplink transmission based on measuring, for example, L1-RSRP of the RS resources.
  • the BS can indicate the UE of which Tx beam of the BS is used to transmit, so that the UE can use proper Rx beam to receive the downlink transmission.
  • the BS can indicate an identify (ID) of one Tx beam of the BS to the UE.
  • the BS can use downlink control information (DCI) in a PDCCH to indicate the ID of one Tx beam that is used to transmit a corresponding PDSCH.
  • DCI downlink control information
  • the BS can also indicate the UE of which Tx beam of the UE to be used.
  • the UE uses a Tx beam that is indicated by the BS through a configuration of spatial relation information.
  • the UE uses the Tx beam that is indicated by the BS through the configuration of spatial relation information.
  • the UE uses a Tx beam that indicated by an information element contained in a scheduling DCI.
  • this function is used by the BS to switch a Tx beam used for a downlink or uplink transmission.
  • This function is useful when the Tx beam used for transmission currently is out of date due to for example a movement of the UE.
  • the BS can send signaling to the UE to inform a change of Tx beam.
  • the BS can switch an uplink Tx beam of the UE used to transmit some uplink transmission.
  • DL signals can include control signaling conveying DCI through a PDCCH, data signals conveying information packet through a PDSCH and some types of reference signals.
  • the DCI can indicate information of how the PDSCH is transmitted, including for example resource allocation and transmission parameters for the PDSCH.
  • the BS can transmit one or more types of reference signals for different purposes, including a demodulation reference symbol (DM-RS) that is transmitted along with the PDSCH and can be used by the UE to demodulate the PDSCH, a channel state information reference signal (CSI-RS) that can be used by the UE to measure BS’s Tx beam or CSI of a downlink channel between the BS and the UE, a phase tracking reference signal (PT-RS) that is also transmitted along with a PDSCH and can be used by the UE to estimate a phase noise caused by imperfection in a radio frequency (RF) part in a transmitter and a receiver and then compensate it when decoding the PDSCH.
  • DM-RS demodulation reference symbol
  • CSI-RS channel state information reference signal
  • PT-RS phase tracking reference signal
  • DL resource allocation for PDCCH, PDSCH, and reference signals is performed in a unit of orthogonal frequency division multiplexing (OFDM) symbols and a group of physical resource blocks (PRBs) .
  • Each PRB contains a few resource elements (REs) , for example 12 REs, in a frequency domain.
  • a transmission bandwidth (BW) of one downlink transmission consists of frequency resource unit called as resource blocks (RBs) and each RB consists of a few subcarriers or REs, for example, 12 subcarriers or 12 REs.
  • UL signals transmitted by the UE to the BS can include data signals conveying data packet through a PUSCH, uplink control signals conveying UL control information (UCI) which can be transmitted in the PUSCH or a PUCCH, and UL reference signals.
  • the UCI can carry a schedule request (SR) used by the UE to request an uplink transmission resource, a hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback for a PDSCH transmission or a channel state information (CSI) report.
  • SR schedule request
  • HARQ-ACK hybrid automatic repeat request acknowledgement
  • CSI channel state information
  • the UE can transmit one or more types of uplink reference signals for different purposes, including DM-RS that is transmitted along with a PUSCH transmission and can be used by the BS to demodulate the PUSCH, PT-RS that is also transmitted along with a PUSCH and can be used by the BS to estimate the phase noise caused by imperfection in RF parts and the BS then can compensate it when decoding PUSCH, and SRS signals that are used by the BS to measure one or more UE Tx beams or CSI of the uplink channel between the UE and the BS.
  • UL resource allocation for PUSCH, PUCCH, and UL reference signal is also performed in a unit of symbols and a group of PRBs.
  • a transmission interval for DL or UL channels/signals is referred to as a slot and each slot contains a few, for example 14, symbols in time domain.
  • the duration of one slot can be 1, 0.5, 0.25 or 0.123 millisecond, for the subcarrier spacing 15KHz, 30KHz, 60KHz, and 120 KHz, respectively.
  • NR systems support flexible numerologies and an embodiment can choose proper OFDM subcarrier spacing based on the deployment scenario and service requirement. In the NR system, DL and UL transmission can use different numerologies.
  • FIG. 1 illustrates a transmitter block diagram for a DL or UL transmission.
  • An embodiment of the transmitter block illustrated in FIG. 1 is for illustration only. Other embodiments could be used without departing from the scope of the present disclosure.
  • Information bits 001 can be first encoded by an encoder 002 such as a low density parity check (LDPC) encoder or polar encoder, and then modulated by a modulator 003.
  • the modulation can be, for example, binary phase-shift keying (BPSK) , quadrature amplitude modulation (QAM) 4, QAM 16, QAM 64, or QAM 256.
  • a serial to parallel (S/P) converter 004 can generate parallel multiple modulation symbols that are subsequently inputted to a RE mapper and precoder 005.
  • the RE mapper and precoder 005 can map the modulation symbols to selected REs and then apply some precoder on the modulation symbols on the BW resource assigned to a DL or UL transmission. Then in 006, the modulation symbols are applied with an inverse fast fourier transform (IFFT) and an output thereof is then serialized by a parallel to serial (P/S) converter 007. Then the signals are sent to a Tx unit 008 including for example a digital-to-analog (D/A) convertor, a radio frequency convertor, a filter, a power amplified, and Tx antenna elements, and transmitted out.
  • D/A digital-to-analog
  • FIG. 2 illustrates a receiver block diagram for receiving a DL or UL transmission.
  • An embodiment of the receiver block illustrated in FIG. 2 is for illustration only. Other embodiments could be used without departing from the scope of the present disclosure.
  • Received signals 011 are first passed through a Rx unit 012 including for example Rx antenna elements, a low noise power amplifier, radio frequency converters, and filters. And an output thereof is passed through a P/S013 and then applied an FFT 014. After converting into a frequency domain, useful signals are extracted by a RE demapping 015 according to a resource allocation for the DL or UL transmission.
  • a demod 016 demodulates data symbols with a channel estimation that is calculated based on DM-RS and then a decoder 017 such as LDPC decoder or polar decoder, decodes the demodulated data to output information bits 018.
  • a decoder 017 such as LDPC decoder or polar decoder
  • a beam indication is conducted per PUCCH resource.
  • a UE For a given uplink bandwidth part (BWP) in a serving Cell, a UE can be configured with 4 PUCCH resource set and in each PUCCH resource set, the UE is configured with one or more PUCCH resources.
  • the UE For a transmission on each PUCCH resource, the UE is configured with a parameter PUCCH-spatialRelationInfo, which can contain one or more reference signal resource ID (s) .
  • PUCCH-spatialRelationInfo can contain one or more reference signal resource ID (s) .
  • Each of those reference signal resource is used to provide information on which transmit beam the UE can use for the transmission on that PUCCH resource.
  • the UE can use the same Tx beam used to transmit that SRS resource on the transmission on that PUCCH resource.
  • the reference signal resource is a channel state information reference signal (CSI-RS) resource or synchronization signal/physical broadcast channel (SS/PBCH) block
  • the UE can use the uplink Tx beam corresponding to the receive beam used to receive the CSI-RS resource transmission or SS/PBCH block transmission on the transmission on that PUCCH resource.
  • CSI-RS channel state information reference signal
  • SS/PBCH synchronization signal/physical broadcast channel
  • a gNB can configure only one PUCCH-spatialRelationInfo to a PUCCH resource and when the gNB wants to switch the Tx beam of that PUCCH resource, the gNB can re-configure a radio resource control (RRC) parameter.
  • the gNB can also configure multiple PUCCH-spatialRelationInfo to a PUCCH resource in RRC and then use medium access control control element (MAC CE) signaling to activate one of those configured PUCCH-spatialRelationInfo as the current Tx beam for that PUCCH resource.
  • RRC radio resource control
  • MAC CE medium access control control element
  • the gNB wants to switch the Tx beam of one PUCCH resource, the gNB can use one MAC CE message to indicate another PUCCH-spatialRelationInfo for that PUCCH resource.
  • the gNB can use MAC CE message to indicate the PUCCH-spatialRelationInfo for each individual PUCCH resource.
  • the UE For PUSCH scheduled by DCI format 0_0 on a cell, the UE can be requested to transmit that PUSCH according to the spatial relation corresponding to the dedicated PUCCH resources with the lowest ID within the UL BWP of the cell. In other word, if the UE is scheduled with a PUSCH transmission by a DCI format 0_0 in one UL BWP, the UE can use the Tx beam configured to the PUCCH with lowest PUCCH resource ID in the same UL BWP to transmit that PUSCH.
  • the Tx beam indication/updating for PUCCH resource will be changed to per PUCCH group.
  • all the PUCCH resource can be divided into one or two groups.
  • Use case for one group is single TRP transmission and use case for two group is multi-TRP transmission. Every TRP can schedule a PUSCH transmission for a user equipment (UE) and the UE can apply different Tx beam accordingly.
  • UE user equipment
  • FIG. 3 illustrates that, in some embodiments, a user equipment (UE) 10 and a base station 20 of a fallback physical uplink shared channel (PUSCH) transmission according to an embodiment of the present disclosure are provided.
  • the UE 10 may include a processor 11, a memory 12, and a transceiver 13.
  • the base station 20 may include a processor 21, a memory 22 and a 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 an application-specific integrated circuit (ASIC) , other chipsets, logic circuit and/or data processing devices.
  • the memory 12 or 22 may include a read-only memory (ROM) , a random access memory (RAM) , a flash memory, a memory card, a storage medium and/or other storage devices.
  • 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 those can be communicatively coupled to the processor 11 or 21 via various means are known in the art.
  • the communication between UEs relates to vehicle-to-everything (V2X) communication including vehicle-to-vehicle (V2V) , vehicle-to-pedestrian (V2P) , and vehicle-to-infrastructure/network (V2I/N) according to a sidelink technology developed under 3rd generation partnership project (3GPP) release 14, 15, 16, and beyond.
  • UEs communicate with each other directly via a sidelink interface such as a PC5 interface.
  • the processor 11 is configured to be configured or indicated with a first transmit (Tx) beam and a second transmit (Tx) beam by the base station (BS) 20, wherein the first Tx beam and the second Tx beam are configured to be used for a transmission over a physical uplink control channel (PUCCH) .
  • the processor 11 is configured to apply the first Tx beam on a transmission on a PUCCH resource in a first group of PUCCH resources and apply the second Tx beam on a transmission on a PUCCH resource in a second group of PUCCH resources.
  • the UE 10 can determine a Tx beam for a PUSCH transmission according to an association among a physical downlink control channel (PDCCH) where a scheduling downlink control information (DCI) is detected, the first Tx beam, and the second Tx beam.
  • PDCCH physical downlink control channel
  • the processor 11 is configured to partition PUCCH resources into the first group of PUCCH resources and the second group of PUCCH resources.
  • the processor 11 for a transmission over a PUSCH scheduled by a DCI format that is detected by the processor 11, the processor 11 is configured to determine one of the first Tx beam and the second Tx beam to be used according to a configuration of a physical downlink control channel (PDCCH) where the DCI format is detected and an association among the PDCCH, the first Tx beam, and the second Tx beam.
  • the DCI format includes a DCI format 0_0.
  • the processor 11 is further configured with a higher layer index associated with a configuration of a control resource set, wherein for the transmission over the PUSCH scheduled by the DCI format that is detected by monitoring the PDCCH in a search space associated with the control resource set by the processor 11, the processor 11 is configured to determine a spatial relation for the transmission over the PUSCH according to a value of the higher layer index.
  • the processor 11 is further configured with multiple PUCCH resources in a given uplink bandwidth part (BWP) in a cell, and each of the PUCCH resources is linked or configured with a PUCCH resource group identity (ID) .
  • the processor 11 in the configuration of the control resource set, is configured with one control resource set group identity (ID) for one control resource set and is configured with an association between the PUCCH resource group ID and the control resource set group ID.
  • the control resource set is associated with one or more PUCCH resources.
  • the processor 11 is further configured with a configuration of slot aggregation for the transmission over PUSCH, wherein when the transceiver 13 receives the DCI format that schedules the transmission over PUSCH, the processor 11 repeats a transport block (TB) across N consecutive slots according to the configuration of slot aggregation.
  • the processor 11 is indicated with a first PUCCH-spatial relation information value and a second PUCCH-spatial relation information value and is configured to determine the value higher layer index corresponding to which one of the first PUCCH-spatial relation information value and the second PUCCH-spatial relation information value.
  • each of the first PUCCH-spatial relation information value and the second PUCCH-spatial relation information value includes a channel state information reference signal (CSI-RS) resource index or a sounding reference signal (SRS) resource index or a synchronization signal/physical broadcast channel (SS/PBCH) block index.
  • CSI-RS channel state information reference signal
  • SRS sounding reference signal
  • SS/PBCH synchronization signal/physical broadcast channel
  • FIG. 4 illustrates a method 400 of a fallback physical uplink shared channel (PUSCH) transmission of a UE according to an embodiment of the present disclosure.
  • the method 400 includes: a block 410, being configured or indicated a first transmit (Tx) beam and a second transmit (Tx) beam by a base station (BS) , wherein the first Tx beam and the second Tx beam are configured to be used for a transmission over a physical uplink control channel (PUCCH) , and a block 420, applying the first Tx beam on a transmission on a PUCCH resource in the first group of PUCCH resources and applying the second Tx beam on a transmission on a PUCCH resource in the second group of PUCCH resources.
  • a block 410 being configured or indicated a first transmit (Tx) beam and a second transmit (Tx) beam by a base station (BS) , wherein the first Tx beam and the second Tx beam are configured to be used for a transmission over a physical uplink control channel (PU
  • the method 400 performed by the UE can determine a Tx beam for a PUSCH transmission according to an association among a physical downlink control channel (PDCCH) where a scheduling downlink control information (DCI) is detected, the first Tx beam, and the second Tx beam.
  • a physical downlink control channel (PDCCH) where a scheduling downlink control information (DCI) is detected
  • DCI scheduling downlink control information
  • the method further includes partitioning PUCCH resources into the first group of PUCCH resources and the second group of PUCCH resources.
  • the method for a transmission over a PUSCH scheduled by a DCI format that is detected by the UE, includes determining one of the first Tx beam and the second Tx beam to be used according to a configuration of a physical downlink control channel (PDCCH) where the DCI format is detected and an association among the PDCCH, the first Tx beam, and the second Tx beam.
  • the DCI format includes a DCI format 0_0.
  • the method further includes being configured a higher layer index associated with a configuration of a control resource set, wherein for the transmission over the PUSCH scheduled by the DCI format that is detected by monitoring the PDCCH in a search space associated with the control resource set, the method comprises determining a spatial relation for the transmission over the PUSCH according to a value of the higher layer index.
  • the method further includes being configured multiple PUCCH resources in a given uplink bandwidth part (BWP) in a cell, and each of the PUCCH resources is linked or configured with a PUCCH resource group identity (ID) .
  • the method in the configuration of the control resource set, includes being configured one control resource set group identity (ID) for one control resource set and being configured an association between the PUCCH resource group ID and the control resource set group ID.
  • the control resource set is associated with one or more PUCCH resources.
  • the method further includes being configured a configuration of slot aggregation for the transmission over PUSCH, wherein when the UE receives the DCI format that schedules the transmission over PUSCH, the UE repeats a transport block (TB) across N consecutive slots according to the configuration of slot aggregation.
  • the method further includes being indicated a first PUCCH-spatial relation information value and a second PUCCH-spatial relation information value and determining the value higher layer index corresponding to which one of the first PUCCH-spatial relation information value and the second PUCCH-spatial relation information value.
  • each of the first PUCCH-spatial relation information value and the second PUCCH-spatial relation information value includes a channel state information reference signal (CSI-RS) resource index or a sounding reference signal (SRS) resource index or a synchronization signal/physical broadcast channel (SS/PBCH) block index.
  • CSI-RS channel state information reference signal
  • SRS sounding reference signal
  • SS/PBCH synchronization signal/physical broadcast channel
  • FIG. 5 illustrates a method for determining a spatial relation for transmission of PUSCH scheduled by a downlink control information (DCI) format including a DCI format 0_0 according to an embodiment of the present disclosure.
  • DCI downlink control information
  • a UE is configured with two CORESETs at an operation 510.
  • a first CORSET is associated with a higher layer index being set to 0 and a second CORESET is associated with a higher layer index being set to 1.
  • the UE can be indicated with two spatialRelation_info values for the PUCCH resources in a given BWP, a first spatialRelation_info and a second spatialRelation_info.
  • the UE can be requested to apply the first spatialRelation_info on the transmission of a subset of PUCCH resources in the given BWP and the UE can be requested to apply the second spatialRelation_info on the transmission of other PUCCH resources in the given BWP.
  • the UE can detect one DCI format 0_0 in PDCCH and the DCI format 0_0 schedules a PUSCH transmission. Then at an operation 540, the UE can determine the value of the higher layer index associated with the CORESET where the DCI format 0_0 is detected. In other word, the UE can determine the value of the higher layer index associated with the CORESET which is associated with the search space in which the DCI format 0_0 is detected. At an operation 550, the UE can determine the value of the higher layer index is 0 or 1.
  • the UE can transmit the PUSCH according to the spatial relation corresponding to the indicated first spatialRelation_info at an operation 560.
  • the higher layer index associated with the CORESET is set to 1, for that PUSCH scheduled by the DCI format 0_0, the UE can transmit the PUSCH according to the spatial relation corresponding to the indicated first spatialRelation_info at an operation 570.
  • a beam can correspond to an RS resource, which can be a CSI-RS resource, an SRS resource, a SS/PBCH block, or any other type of RS.
  • a UE can be configured or indicated with two Tx beams, a first Tx beam and a second Tx beam, that are used for uplink PUCCH transmission.
  • the UE can partition the UE-specific configured PUCCH resources into two groups, a first group of PUCCH resources and a second group of PUCCH resources.
  • the UE can apply the first Tx beam on the transmission on a PUCCH resource in the first group of PUCCH resources and apply the second Tx beam on the transmission on a PUCCH resource in the second group of PUCCH resources.
  • the UE can determine which one of the first Tx beam or the second Tx beam can be used according to the configuration of PDCCH where the DCI format 0_0 is detected and the association between the PDCCH and the Tx beams indicated for PUCCH resources.
  • a UE can be configured with a first higher layer index associated with the configuration of a first control resource set (CORESET) .
  • the UE can be indicated with two PUCCH-SpatialRelationInfo values, a first PUCCH-SpatialRelationInfo value and a second PUCCH-SpatialRelationInfo value, for PUCCH resources in a given UL BWP in one cell.
  • the PUCCH-SpatialRelationInfo values can be signaled through higher layer signaling, for example MAC CE message or RRC message.
  • the UE can determine the spatial relation for the transmission on that PUSCH according to the value of the higher layer index associated with the configuration of the first CORESET.
  • each PUCCH-SpatialRelationInfo value contains one CSI-RS resource index or one SRS resource index or one SS/PBCH block index.
  • the UE can use a spatial domain transmit filter that is same to spatial domain receive filter used to receive that CSI-RS resource or SS/PBCH block. In some embodiments, if the corresponding PUCCH-SpatialRelationInfo value used by the UE contains one SRS resource, the UE can use a spatial domain transmit filter that is same to the spatial domain transmit filter used to transmit that SRS resource.
  • a UE can be configured with multiple PUCCH resources in a given UL bandwidth part (BWP) in a cell. And those PUCCH resources can be configured in two PUCCH resource groups and each PUCCH resource can be linked or configured with a PUCCH resource group ID.
  • BWP UL bandwidth part
  • the UE can be configured with a CORSET group ID for one CORESET.
  • the UE can be configured with the association between PUCCH resource group ID and CORSET group ID.
  • the UE For each PUCCH resource group, the UE can be indicated or signaled with one PUCCH spatialrelation_info value and the UE can be requested to transmit the any PUCCH resource in that PUCCH resource group according to the spatial relation corresponding to the PUCCH spatialrelation_info value configured or indicated for that group.
  • the UE for a PUSCH scheduled by a DCI format 0_0, the UE can be requested to transmit that PUSCH according to the spatial relation that corresponds to the PUCCH spatialrelation_info value configured or indicated for the PUCCH group with PUCCH group ID that is associated with the CORESET group ID of the CORESET where the DCI format 0_0 is detected.
  • a UE can be configured with a CORESET and the CORESET is associated with one or more PUCCH resources.
  • the UE can be requested to transmit that PUSCH according to the spatial relation that corresponds to the PUCCH spatailRelation_info configured to PUCCH resource with lowest ID within the PUCCH resources that are associated with that CORESET where the DCI format 0_0 is detected.
  • a UE can be configured with a slot aggregation factor that is used to indicate slot-level repetition of one PUSCH transmission.
  • the slot aggregation slot factor can take value of 2, 4, or 8.
  • a UE can be configured with slot aggregation for PUSCH transmission and the UE can be configured/indicated with two Tx beams, a first Tx beam and a second Tx beam, that are used for uplink PUCCH transmission in a given BWP in a cell.
  • the UE can partition the PUCCH resources configured in that BWP into two groups explicitly or implicitly and the UE can apply the first Tx beam on the transmission of PUCCH resource among those PUCCH resources in the first PUCCH group and the UE can apply the second Tx beam on the transmission of PUCCH resource among those PUCCH resources in the second PUCCH resource group.
  • the UE When the UE receives a DCI format 0_0 that schedules a PUSCH transmission, the UE can repeat the TB across N consecutive slots according to the configuration of slot aggregation of PUSCH transmission and the UE can be requested to apply spatial relation on those PUSCH transmission according to one or more of the followings. 1.
  • the UE can be configured with a CORESET and the CORESET is associated with a high layer index (for example called CORESET group ID) .
  • the UE can apply one spatial relation on all the TB repetitions and the spatial relation corresponds to the first Tx beam or the second Tx beam based on the value of higher layer index associated with the CORESET where the DCI format 0_0 is detected. For example, if the value of higher layer index is 0, the UE selects the first Tx beam and if the value of higher layer index is 1, the UE selects the second Tx beam. 2.
  • the UE receives one DCI format 0_0 at slot n that schedules the PUSCH transmission starting from slot n+m. Then the UE can transmit PUSCH in slot n+m, n+m+1, n+m+2 and n+m+3. For such PUSCH transmission, the UE can be requested or configured to apply the first Tx beam on PUSCH in slot n+m, the second Tx beam on PUSCH in slot n+m+1, the first Tx beam on PUSCH in slot n+m+2 and the second Tx beam on PUSCH in slot n+m+3.
  • a UE can be configured with a higher layer index associated with the configuration of a control resource set (CORESET) .
  • the UE can be indicated with two PUCCH-SpatialRelationInfo values, a first PUCCH-SpatialRelationInfo value and a second PUCCH-SpatialRelationInfo value, for PUCCH resources in a given UL BWP in one cell.
  • the PUCCH-SpatialRelationInfo values can be signaled through higher layer signaling, for example MAC CE message or RRC message.
  • the UE can be configured with one or more of the followings. 1.
  • a PUSCH slot aggregation factor which can be used to indicate how many slot (or subslots) the same PUSCH can be repeated.
  • the UE can determine the spatial relation applied to each transmission occasion of the TB of that PUSCH based on one or more of the following factors. 1. The value of higher layer index configured to the CORESET where the DCI format 0_0 is detected. 2. The association between the value of higher layer index configured to CORSET and the PUCCH group or the spatialrelation_info values indicated for the PUCCH in a given BWP. 3. The configured PUSCH aggregation factor. 4. The configured PUSCH spatial relation pattern.
  • the methods for a UE to determine the spatialrelation_info for a transmission of PUSCH scheduled by DCI format 0_0 are presented.
  • the PUCCH resources can be divided into two groups explicitly or implicitly.
  • the gNB can indicate one spatialrelation_info that is applied to all the PUCCH resources contained in that group.
  • the UE can determine the spatial relation for the transmission of that PUSCH according to the value of a higher layer index configured to the PDCCH where that DCI format 0_0 is detected and the association between the higher layer index and the PUCCH group for spatialrelation_info indication.
  • each single TRP can use DCI format 0_0 to schedule PUSCH transmission to a UE flexibly and dynamically.
  • the UE can apply different proper Tx beam on PUSCH transmission accordingly for different TRP reception.
  • the proposed methods in some embodiments of the present disclosure can provide low-overhead and low-latency signaling for supporting DCI 0_0-based PUSCH transmission in multi-TRP system.
  • a user equipment (UE) and a method of a fallback physical uplink shared channel (PUSCH) transmission capable of providing high reliability, low-overhead and low-latency signaling for supporting a DCI format based physical uplink shared channel (PUSCH) transmission in a multi-transmission and receiving points (TRP) system are provided. Every TRP can schedule a PUSCH transmission for a user equipment (UE) and the UE can apply different Tx beam accordingly.
  • the embodiment of the present disclosure is a combination of techniques/processes that can be adopted in 3GPP specification to create an end product.
  • FIG. 6 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. 6 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.
  • RF radio frequency
  • 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 combinations of general-purpose processors and dedicated processors, such as graphics processors and 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 a 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 enable 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
  • 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) .
  • 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.
  • 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.
  • USB universal serial bus
  • 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.
  • 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, 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)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un équipement utilisateur (UE) et un procédé d'émission de canal partagé de liaison montante physique (PUSCH) de repli. Le procédé comprend l'étape selon laquelle une station de base (BS) configure ou indique un premier faisceau d'émission (Tx) et un second faisceau d'émission (Tx), le premier faisceau Tx et le second faisceau Tx étant configurés de sorte à être utilisés pour une émission sur un canal de commande de liaison montante physique (PUCCH), et applique le premier faisceau Tx sur une émission sur une ressource PUCCH dans un premier groupe de ressources PUCCH et le second faisceau Tx sur une émission sur une ressource PUCCH dans un second groupe de ressources PUCCH. L'UE peut déterminer un faisceau Tx pour une émission PUSCH selon une association entre un canal de commande de liaison descendante physique (PDCCH), où une information de commande de liaison descendante de planification (DCI) est détectée, le premier faisceau Tx et le second faisceau Tx.
PCT/CN2020/101678 2019-07-22 2020-07-13 Équipement utilisateur et procédé d'émission de canal partagé de liaison montante physique de repli WO2021012977A1 (fr)

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