Method and device for multiantenna parameter configuration in wireless communications
A method and a device in a node for wireless communications. A first node receives a first information block and a second information block; and receives a first radio signal in a first time-frequency resource set; the first information block is used to determine a first transmission configuration parameter group, the first transmission configuration parameter group comprising multiple transmission configuration parameters; the multiple transmission configuration parameters are respectively used to determine multiple reference signals, with a first reference signal being one of the multiple reference signals; there is a first-type relationship between the first radio signal and the first reference signal, and there is a second-type relationship between the first radio signal and one of the multiple reference signals other than the first reference signal. The method given in the present application can enhance the performance of offsetting Doppler Shift in multi-TRP scenarios.
1 . A user equipment (UE), comprising:
a receiver configured to receive:
radio resource control (RRC) information indicating a Transmission Configuration Indicator (TCI) state group that includes a first TCI state that indicates a first quasi co-location (QCL) relationship of a first type for a first reference signal and a second TCI state that indicates a second QCL relationship of a second type for a second reference signal;
downlink control information (DCI) that indicates time-frequency resources; and
a physical downlink shared channel (PDSCH) in the time-frequency resources,
wherein the UE is configured to receive the PDSCH based on a TCI state of the TCI state group, wherein the TCI state is determined based on comparing a time difference between a reception time of the DCI and a reception time of the PDSCH with a threshold.
2 . The UE according to claim 1 , wherein on a condition that the time difference is less than the threshold, the TCI state has a lowest index of the TCI state group.
3 . The UE according to claim 1 , wherein:
the receiver is configured to receive a signal having a transmission start time that precedes a start time of the time-frequency resources.
4 . The UE according to claim 1 , wherein on a condition that the time difference is greater than or equal to the threshold, the TCI state is determined based on information included in the DCI.
5 . The UE according to claim 1 , wherein the first QCL relationship of the first type includes a Doppler shift QCL relationship, and the second QCL relationship of the second type does not include a Doppler shift QCL relationship.
6 . The UE according to claim 1 , wherein the RRC information indicates a plurality of TCI state groups, and a group of the plurality of TCI state groups includes a plurality of TCI states.
7 . The UE according to claim 1 , wherein a reception frequency of the PDSCH is based on a reference signal associated with the TCI state and reference signals of remaining TCI states of the TCI state group are not used to determine the reception frequency.
8 . The UE according to claim 1 , wherein the TCI state is determined based the time difference between the reception time of the DCI and the reception time of the PDSCH being greater than or equal to the threshold.
9 . The UE according to claim 1 , wherein the threshold is configured by a timeDurationForQCL field in RRC signaling.
10 . A base station, comprising:
a transmitter configured to transmit:
a radio resource control (RRC) information indicating a Transmission Configuration Indicator (TCI) state group that includes a first TCI state that indicates a first quasi co-location (QCL) relationship of a first type for a first reference signal and a second TCI state that indicates a second QCL relationship of a second type for a second reference signal;
downlink control information (DCI) that indicates time-frequency resources; and
a physical downlink shared channel (PDSCH) in the time-frequency resources,
wherein the PDSCH is received based on a TCI state of the TCI state group, and wherein the TCI state is determined based on comparing a time difference between a reception time of the DCI and a reception time of the PDSCH with a threshold.
11 . The base station according to claim 10 , wherein on a condition that the time difference is less than the threshold, the TCI state has a lowest index of the TCI state group.
12 . A method, comprising:
receiving radio resource control (RRC) information indicating a Transmission Configuration Indicator (TCI) state group that includes a first TCI state that indicates a first quasi co-location (QCL) relationship of a first type for a first reference signal and a second TCI state that indicates a second QCL relationship of a second type for a second reference signal;
receiving downlink control information (DCI) that indicates time-frequency resources; and
receiving a physical downlink shared channel (PDSCH) in the time-frequency resources,
wherein the PDSCH is received based on a TCI state of the TCI state group, wherein the TCI state is determined based on comparing a time difference between a reception time of the DCI and a reception time of the PDSCH with a threshold.
13 . The method according to claim 12 , wherein on a condition that the time difference is less than the threshold, the TCI state has a lowest index of the TCI state group.
14 . The method according to claim 12 , comprising:
receiving a signal having a transmission start time that precedes a start time of the time-frequency resources.
15 . The method according to claim 12 , wherein on a condition that the time difference is greater than or equal to the threshold, the TCI state is determined based on information included in the DCI.
16 . The method according to claim 12 , wherein the first QCL relationship of the first type includes a Doppler shift QCL relationship, and the second QCL relationship of the second type does not include a Doppler shift QCL relationship.
17 . The method according to claim 12 , wherein the RRC information indicates a plurality of TCI state groups, and a group of the plurality of TCI state groups includes a plurality of TCI states.
18 . The method according to claim 12 , wherein a reception frequency of the PDSCH is based on a reference signal associated with the TCI state and reference signals of remaining TCI states of the TCI state group are not used to determine the reception frequency.
19 . The method according to claim 12 , wherein on a condition that the time difference is less than the threshold, the TCI state has a lowest index of the TCI state group.
20 . The method according to claim 12 , wherein the threshold is configured by a timeDurationForQCL field in RRC signaling.