Joint transmission configuration indicator (TCI) indication for single-channel TCI
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive transmission configuration indicator (TCI) information relating to a common beam TCI indication, the TCI information relating to a plurality of channels or reference signals. The UE may selectively transmit or receive one or more channels or reference signals of the plurality of channels or reference signals in accordance with the TCI information, based at least in part on whether the TCI information relating to the common beam TCI indication is usable for the one or more channels or reference signals of the plurality of channels or reference signals, wherein the one or more channels or reference signals are a proper subset of the plurality of channels or reference signals. Numerous other aspects are described.
1. A method of wireless communication performed by a user equipment (UE), comprising:
receiving transmission configuration indicator (TCI) information relating to a common beam TCI indication that relates to a plurality of channels or reference signals; and
transmitting or receiving one or more channels or reference signals of the plurality of channels or reference signals in accordance with the TCI information, based at least in part on whether the TCI information indicates that the common beam TCI indication is usable for the one or more channels or reference signals of the plurality of channels or reference signals, wherein the one or more channels or reference signals are a proper subset of the plurality of channels or reference signals.
2. The method of claim 1 , wherein the common beam TCI indication is a beam indication for the plurality of channels or reference signals.
3. The method of claim 1 , wherein transmitting or receiving the one or more channels or reference signals further comprises:
transmitting or receiving the one or more channels or reference signals using a TCI state indicated by the common beam TCI indication based at least in part on the TCI information indicating that the common beam TCI indication is usable for the one or more channels or reference signals.
4. The method of claim 1 , wherein the method further comprises:
transmitting or receiving the plurality of channels or reference signals using a TCI state indicated by the common beam TCI indication based at least in part on the TCI information indicating that the common beam TCI indication is not usable for the one or more channels or reference signals.
5. The method of claim 1 , wherein transmitting or receiving the one or more channels or reference signals further comprises:
transmitting or receiving the one or more channels or reference signals using a TCI state indicated by the common beam TCI indication based at least in part on the TCI information indicating whether the common beam TCI indication is usable for the one or more channels or reference signals.
6. The method of claim 1 , wherein the method further comprises receiving radio resource control information identifying one or more TCI pools from which a selected TCI state can be indicated for an uplink or downlink communication.
7. The method of claim 6 , wherein the plurality of channels or reference signals are associated with a first TCI type and the one or more channels or reference signals are associated with a second TCI type different than the first TCI type.
8. The method of claim 7 , wherein a same TCI pool, of the one or more TCI pools, is usable for a plurality of TCI types including the first TCI type and the second TCI type.
9. The method of claim 7 , wherein the first TCI type and the second TCI type are included in a plurality of TCI types, and wherein each TCI type, of the plurality of TCI types, is associated with a different TCI pool of the one or more TCI pools.
10. The method of claim 7 , wherein the radio resource control information includes information indicating one or more TCI types for which each TCI pool, of the one or more TCI pools, is usable.
11. The method of claim 7 , wherein the first TCI type is at least one of:
a joint uplink/downlink TCI type,
a downlink-only common TCI type, or
an uplink-only common TCI type, and wherein the second TCI type is at least one of:
a downlink single TCI type, or
an uplink single TCI type.
12. The method of claim 1 , wherein the TCI information includes a downlink control information (DCI) or medium access control (MAC) based update or activation of a TCI configuration for the one or more channels or reference signals.
13. The method of claim 1 , wherein the TCI information includes a simultaneous TCI activation applicable across multiple component carriers (CCs), and wherein the method further comprises:
activating or updating one or more TCI states across the multiple CCs for the one or more channels or reference signals in accordance with the TCI information based at least in part on the simultaneous TCI activation being usable for the one or more channels or reference signals.
14. The method of claim 13 , wherein the TCI information indicates a single TCI state identifier, and wherein the single TCI state identifier is used to provide a quasi-colocation indication and to determine an uplink transmit spatial filter across the multiple CCs.
15. A method of wireless communication performed by a base station, comprising:
transmitting transmission configuration indicator (TCI) information relating to a common beam TCI indication for a plurality of channels or reference signals; and
transmitting or receiving one or more channels or reference signals of the plurality of channels or reference signals in accordance with the TCI information, based at least in part on whether the TCI information indicates that the common beam TCI indication is usable for the one or more channels or reference signals, wherein the one or more channels or reference signals are a proper subset of the plurality of channels or reference signals.
16. The method of claim 15 , wherein the common beam TCI indication is a beam indication for the plurality of channels or reference signals.
17. The method of claim 15 , wherein transmitting or receiving the one or more channels or reference signals further comprises:
transmitting or receiving the one or more channels or reference signals using a TCI state indicated by the common beam TCI indication based at least in part on the TCI information indicating that the common beam TCI indication is usable for the one or more channels or reference signals.
18. The method of claim 15 , wherein the method further comprises:
transmitting or receiving the plurality of channels or reference signals using a TCI state indicated by the common beam TCI indication based at least in part on the TCI information indicating that the common beam TCI indication is not usable for the one or more channels or reference signals.
19. A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors coupled to the memory and configured to:
receive transmission configuration indicator (TCI) information relating to a common beam TCI indication that relates to a plurality of channels or reference signals; and
transmit or receive one or more channels or reference signals of the plurality of channels or reference signals in accordance with the TCI information, based at least in part on whether the TCI information indicates that the common beam TCI indication is usable for the one or more channels or reference signals of the plurality of channels or reference signals, wherein the one or more channels or reference signals are a proper subset of the plurality of channels or reference signals.
20. The UE of claim 19 , wherein the common beam TCI indication is a beam indication for the plurality of channels or reference signals.
21. The UE of claim 19 , wherein the one or more processors, to transmit or receive the one or more channels or reference signals, are configured to:
transmit or receive the one or more channels or reference signals using a TCI state indicated by the common beam TCI indication based at least in part on the TCI information indicating that the common beam TCI indication is usable for the one or more channels or reference signals.
22. The UE of claim 19 , wherein the one or more processors are further configured to:
transmit or receive the plurality of channels or reference signals using a TCI state indicated by the common beam TCI indication based at least in part on the TCI information indicating that the common beam TCI indication is not usable for the one or more channels or reference signals.
23. The UE of claim 19 , wherein the one or more processors, to transmit or receive the one or more channels or reference signals, are configured to:
transmit or receive the one or more channels or reference signals using a TCI state indicated by the common beam TCI indication based at least in part on the TCI information indicating whether the common beam TCI indication is usable for the one or more channels or reference signals.
24. The UE of claim 19 , wherein the one or more processors are further configured to receive radio resource control information identifying one or more TCI pools from which a selected TCI state can be indicated for an uplink or downlink communication.
25. The UE of claim 24 , wherein the plurality of channels or reference signals are associated with a first TCI type and the one or more channels or reference signals are associated with a second TCI type different than the first TCI type.
26. The UE of claim 25 , wherein a same TCI pool, of the one or more TCI pools, is usable for a plurality of TCI types including the first TCI type and the second TCI type.
27. The UE of claim 25 , wherein the first TCI type and the second TCI type are included in a plurality of TCI types, and wherein each TCI type, of the plurality of TCI types, is associated with a different TCI pool of the one or more TCI pools.
28. The UE of claim 25 , wherein the TCI information includes information indicating one or more TCI types for which each TCI pool, of the one or more TCI pools, is usable.
29. The UE of claim 25 , wherein the first TCI type is at least one of:
a joint uplink/downlink TCI type,
a downlink-only common TCI type, or
an uplink-only common TCI type, and wherein the second TCI type is at least one of:
a downlink single TCI type, or
an uplink single TCI type.
30. The UE of claim 19 , wherein the TCI information includes a downlink control information (DCI) or medium access control (MAC) based update or activation of a TCI configuration for the one or more channels or reference signals.