Method and device in nodes used for wireless communication
The present disclosure provides a method and device in nodes for wireless communication. A first node receives first information; and receives a first signaling. The first information is used for determining K resource blocks; the K resource blocks respectively correspond to K reference-signal resource groups; any reference-signal resource in the K reference-signal resource groups corresponds to one of M first-type indexes; the first signaling is used for activating a first index in the M first-type indexes; a first resource block is any of the K resource blocks, a first reference-signal resource is used for determining a spatial relation of the first resource block, and the first reference-signal resource is one reference-signal resource corresponding to the first index in a reference-signal resource group corresponding to the first resource block. The above method employs information selected by TRP/panel, thus reducing a signaling overhead and delay of beam management.
1 . A user equipment (UE) configured for wireless communications, the UE comprising:
a processor; and
a receiver configured to receive a first indication in Radio Resource Control (RRC) signaling, which indicates: at least two control resource sets (CORESETs) and, for each CORESET of the at least two CORESETs, a Transmission Configuration Indication (TCI) state group including one or more TCI states;
wherein a corresponding first-type index of a plurality of first-type indices relates each TCI state to a corresponding reference-signal resource, wherein each TCI state and the corresponding reference-signal resource are used to determine a spatial relation for physical downlink control channel (PDCCH) reception in a corresponding CORESET, and wherein a reference-signal resource group corresponds to each TCI state group, and each reference-signal resource group comprises one or more Channel State Information Reference Signal (CSI-RS) resources or one or more Synchronization Signal/Physical Broadcast Channel (SS/PBCH) resources; and
the receiver further configured to receive a medium access control layer control element (MAC CE) that activates an index of the plurality of first-type indices;
wherein, in response to the MAC CE, the UE sets for each of the at least two CORESETs, the spatial relation for PDCCH reception according to the TCI state and the corresponding reference-signal resource that correspond to the activated index.
2 . The UE of claim 1 , further comprising a transmitter configured to transmit a hybrid automatic repeat request acknowledgement (HARQ-ACK) that indicates that a signal carrying the MAC CE is correctly received; and
following a time interval that follows the HARQ-ACK, spatial reception parameters of the at least two CORESETs are determined by a reference-signal resource corresponding to each CORESET that corresponds to the activated index.
3 . The UE of claim 1 , wherein:
a position of the reference-signal resource corresponding to the activated index for each CORESET is a default position; and
a reference-signal resource identifier of any reference-signal resource in the reference-signal resource groups is a Non-Zero Power (NZP)-CSI-RS-Resourceld or Synchronization Signal Block (SSB)-Index.
4 . The UE of claim 1 , wherein:
a Demodulation Reference Signal (DMRS) antenna port associated with a reception of a PDCCH within at least one of the at least two CORESETs is Quasi-Co-Located with a reference signal for which the reference-signal resource corresponding to the activated index is reserved.
5 . A base station configured for wireless communications, the base station comprising:
a processor; and
a transmitter configured to transmit, to a user equipment (UE), a first indication in Radio Resource Control (RRC) signaling, which indicates: at least two control resource sets (CORESETs) and, for each CORESET of the at least two CORESETs, a Transmission Configuration Indication (TCI) state group including one or more TCI states;
wherein a corresponding first-type index of a plurality of first-type indices relates each TCI state to a corresponding reference-signal resource, wherein each TCI state and the corresponding reference-signal resource are used to determine a spatial relation for physical downlink control channel (PDCCH) reception in a corresponding CORESET, and wherein a reference-signal resource group corresponds to each TCI state group, and each reference-signal resource group comprises one or more Channel State Information Reference Signal (CSI-RS) resources or one or more Synchronization Signal/Physical Broadcast Channel (SS/PBCH) resources; and
the transmitter further configured to transmit a medium access control layer control element (MAC CE) that activates an index of the plurality of first-type indices;
wherein the MAC CE indicates, for each of the at least two CORESETs, the spatial relation for PDCCH transmission according to the TCI state and the corresponding reference-signal resource that correspond to the activated index.
6 . The base station of claim 5 , further comprising a receiver configured to receive a hybrid automatic repeat request acknowledgement (HARQ-ACK) that indicates that a signal carrying the MAC CE is correctly received; and
following a time interval that follows the HARQ-ACK, spatial reception parameters of the at least two CORESETs are based on a reference-signal resource corresponding to each CORESET that corresponds to the activated index.
7 . The base station of claim 5 , wherein:
a position of the reference-signal resource corresponding to the activated index for each CORESET is a default position; and
a reference-signal resource identifier of any reference-signal resource in the reference-signal resource groups is a Non-Zero Power (NZP)-CSI-RS-Resourceld or Synchronization Signal Block (SSB)-Index.
8 . The base station of claim 5 , wherein:
a Demodulation Reference Signal (DMRS) antenna port associated with a reception of a PDCCH within at least one of the at least two CORESETs is Quasi-Co-Located with a reference signal for which the reference-signal resource corresponding to the activated index is reserved.
9 . A method performed by a user equipment (UE), the method comprising:
receiving a first indication in Radio Resource Control (RRC) signaling, which indicates: at least two control resource sets (CORESETs) and, for each CORESET of the at least two CORESETs, a Transmission Configuration Indication (TCI) state group including one or more TCI states;
wherein a corresponding first-type index of a plurality of first-type indices relates each TCI state to a corresponding reference-signal resource, wherein each TCI state and the corresponding reference-signal resource are used to determine a spatial relation for physical downlink control channel (PDCCH) reception in a corresponding CORESET, and wherein a reference-signal resource group corresponds to each TCI state group, and each reference-signal resource group comprises one or more Channel State Information Reference Signal (CSI-RS) resources or one or more Synchronization Signal/Physical Broadcast Channel (SS/PBCH) resources; and
receiving a medium access control layer control element (MAC CE) that activates an index of the plurality of first-type indices;
wherein, in response to the MAC CE, the UE sets for each of the at least two CORESETs, the spatial relation for PDCCH reception according to the TCI state and the corresponding reference-signal resource that correspond to the activated index.
10 . The method of claim 9 , further comprising:
transmitting a hybrid automatic repeat request acknowledgement (HARQ-ACK) that indicates that a signal carrying the MAC CE is correctly received; and
following a time interval that follows the HARQ-ACK, spatial reception parameters of the at least two CORESETs are determined by a reference-signal resource corresponding to each CORESET that corresponds to the activated index.
11 . The method of claim 9 , wherein:
a position of the reference-signal resource corresponding to the activated index for each CORESET is a default position; and
a reference-signal resource identifier of any reference-signal resource in the reference-signal resource groups is a Non-Zero Power (NZP)-CSI-RS-Resourceld or Synchronization Signal Block (SSB)-Index.
12 . The method of claim 9 , wherein:
a Demodulation Reference Signal (DMRS) antenna port associated with a reception of a PDCCH within at least one of the at least two CORESETs is Quasi-Co-Located with a reference signal for which the reference-signal resource corresponding to the activated index is reserved.
13 . A method performed by a base station, the method comprising:
transmitting, to a user equipment (UE), a first indication in Radio Resource Control (RRC) signaling, which indicates: at least two control resource sets (CORESETs) and, for each CORESET of the at least two CORESETs, a Transmission Configuration Indication (TCI) state group including one or more TCI states;
wherein a corresponding first-type index of a plurality of first-type indices relates each TCI state to a corresponding reference-signal resource, wherein each TCI state and the corresponding reference-signal resource are used to determine a spatial relation for physical downlink control channel (PDCCH) reception in a corresponding CORESET, and wherein a reference-signal resource group corresponds to each TCI state group, and each reference-signal resource group comprises one or more Channel State Information Reference Signal (CSI-RS) resources or one or more Synchronization Signal/Physical Broadcast Channel (SS/PBCH) resources; and
transmitting a medium access control layer control element (MAC CE) that activates an index of the plurality of first-type indices;
wherein the MAC CE indicates, for each of the at least two CORESETs, the spatial relation for PDCCH transmission according to the TCI state and the corresponding reference-signal resource that correspond to the activated index.
14 . The method of claim 13 , further comprising:
receiving a hybrid automatic repeat request acknowledgement (HARQ-ACK) that indicates that a signal carrying the MAC CE is correctly received; and
following a time interval that follows the HARQ-ACK, spatial reception parameters of the at least two CORESETs are based on a reference-signal resource corresponding to each CORESET that corresponds to the activated index.
15 . The method of claim 13 , wherein:
a position of the reference-signal resource corresponding to the activated index for each CORESET is a default position; and
a reference-signal resource identifier of any reference-signal resource in the reference-signal resource groups is a Non-Zero Power (NZP)-CSI-RS-Resourceld or Synchronization Signal Block (SSB)-Index.
16 . The method of claim 13 , wherein:
a Demodulation Reference Signal (DMRS) antenna port associated with a transmission of a PDCCH within at least one of the at least two CORESETs is Quasi-Co-Located with a reference signal for which the reference-signal resource corresponding to the activated index is reserved.