Group-based beam indication and signaling
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a downlink beam indication for at least one of a channel, a resource, a resource set, a bandwidth part, or a component carrier; and use the downlink beam indication for a group of channels, resources, resource sets, bandwidth parts, or component carriers. In some aspects, a UE may receive an indication of a spatial relation and multiple physical uplink control channel (PUCCH) resources to which the spatial relation is to be applied; and use the spatial relation to transmit on one or more PUCCH resources of the multiple PUCCH resources. Numerous other aspects are provided.
1. A method of wireless communication performed by a user equipment (UE), comprising:
receiving a downlink beam indication for at least one of a bandwidth part or a component carrier; and
using the downlink beam indication for a group of bandwidth parts or component carriers,
wherein the group of bandwidth parts or component carriers includes at least one of a different bandwidth part than the bandwidth part or a different component carrier than the component carrier.
2. The method of claim 1 , wherein the downlink beam indication includes at least one of a transmission configuration indicator (TCI) state or a quasi co-location (QCL) relationship.
3. The method of claim 2 , wherein the downlink beam indication is received for a first physical downlink shared channel (PDSCH) and for at least one of a first bandwidth part or a first component carrier, and wherein the downlink beam indication is used for a second PDSCH and for at least one of a second bandwidth part or a second component carrier.
4. The method of claim 1 , wherein the downlink beam indication is received for a first control resource set (CORESET) and for at least one of a first bandwidth part or a first component carrier, and wherein the downlink beam indication is used for a second CORESET on at least one of a second bandwidth part or a second component carrier.
5. The method of claim 1 , wherein the downlink beam indication is stored in a configuration or activated for use.
6. A method of wireless communication performed by a user equipment (UE), comprising:
receiving an indication of a spatial relation and multiple physical uplink control channel (PUCCH) resources to which the spatial relation is to be applied,
wherein the indication indicates the multiple PUCCH resources using at least one of a bandwidth part identifier or a component carrier identifier; and
using the spatial relation to transmit on one or more PUCCH resources of the multiple PUCCH resources.
7. The method of claim 6 , wherein the multiple PUCCH resources are indicated using component identifiers that include:
a PUCCH resource identifier,
the bandwidth part identifier, and
the component carrier identifier.
8. The method of claim 7 , wherein a component identifier, of the component identifiers, is indicated using one of:
a first format that explicitly indicates a single component identifier for a component,
a second format that includes a bitmap that indicates the component identifier from a set of configured component identifiers,
a third format that indicates all component identifiers for a component, or
a fourth format that indicates a number of component identifiers and a corresponding component identifier for each of the number of component identifiers.
9. The method of claim 7 , wherein a format to be used to indicate a component identifier, of the component identifiers, is signaled to the UE.
10. The method of claim 6 , wherein the indication is received in a single media access control (MAC) control element (MAC-CE).
11. The method of claim 10 , wherein the single MAC-CE has a variable length.
12. The method of claim 6 , wherein the indication indicates the multiple PUCCH resources using the bandwidth part identifier.
13. The method of claim 6 , wherein a single MAC-CE is used to indicate the spatial relation, the multiple PUCCH resources, and a set of formats for interpreting a set of bits used to indicate a set of components that indicate the multiple PUCCH resources.
14. The method of claim 13 , wherein the set of components is indicated by the set of formats and a validity indicator that indicates whether a format, of the set of formats, is to be used to identify a corresponding component or whether all component identifiers for the component are to be used to identify PUCCH resources.
15. The method of claim 14 , wherein the single MAC-CE has a fixed length and the validity indicator is included in a body of the MAC-CE.
16. The method of claim 13 , wherein the set of components is explicitly indicated by the set of formats.
17. The method of claim 16 , wherein the single MAC-CE has a fixed length.
18. The method of claim 6 , wherein the indication indicates the multiple PUCCH resources using the component carrier identifier.
19. A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:
receive a downlink beam indication for at least one of a bandwidth part or a component carrier; and
use the downlink beam indication for a group of bandwidth parts or component carriers,
wherein the group of bandwidth parts or component carriers includes at least one of a different bandwidth part than the bandwidth part or a different component carrier than the component carrier.
20. The UE of claim 19 , wherein the downlink beam indication is received for a first control resource set (CORESET) and for at least one of a first bandwidth part or a first component carrier, and wherein the downlink beam indication is used for a second CORESET on at least one of a second bandwidth part or a second component carrier.
21. The UE of claim 19 , wherein the downlink beam indication is stored in a configuration or activated for use.
22. The UE of claim 19 , wherein the downlink beam indication includes at least one of a transmission configuration indicator (TCI) state or a quasi co-location (QCL) relationship.
23. The UE of claim 22 , wherein the downlink beam indication is received for a first physical downlink shared channel (PDSCH) and for at least one of a first bandwidth part or a first component carrier, and wherein the downlink beam indication is used for a second PDSCH and for at least one of a second bandwidth part or a second component carrier.
24. A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:
receive an indication of a spatial relation and multiple physical uplink control channel (PUCCH) resources to which the spatial relation is to be applied,
wherein the indication indicates the multiple PUCCH resources using at least one of a bandwidth part identifier or a component carrier identifier; and
use the spatial relation to transmit on one or more PUCCH resources of the multiple PUCCH resources.
25. The UE of claim 24 , wherein the indication is received in a single media access control (MAC) control element (MAC-CE).
26. The UE of claim 24 , wherein a single MAC-CE is used to indicate the spatial relation, the multiple PUCCH resources, and a set of formats for interpreting a set of bits used to indicate a set of components that indicate the multiple PUCCH resources.
27. The UE of claim 26 , wherein the set of components is indicated by the set of formats and a validity indicator that indicates whether a format, of the set of formats, is to be used to identify a corresponding component or whether all component identifiers for the component are to be used to identify PUCCH resources.
28. The UE of claim 26 , wherein the set of components is explicitly indicated by the set of formats.
29. The UE of claim 28 , wherein the single MAC-CE has a fixed length.
30. The UE of claim 24 , wherein the multiple PUCCH resources are indicated using component identifiers that include:
a PUCCH resource identifier,
the bandwidth part identifier, and
the component carrier identifier.
31. The UE of claim 30 , wherein a component identifier, of the component identifiers, is indicated using one of:
a first format that explicitly indicates a single component identifier for a component,
a second format that includes a bitmap that indicates the component identifier from a set of configured component identifiers,
a third format that indicates all component identifiers for a component, or
a fourth format that indicates a number of component identifiers and a corresponding component identifier for each of the number of component identifiers.
32. The UE of claim 30 , wherein a format to be used to indicate a component identifier, of the component identifiers, is signaled to the UE.
33. A method of wireless communication performed by a user equipment (UE), comprising:
receiving a downlink beam indication for at least one of a bandwidth part or a component carrier,
wherein the downlink beam indication includes at least one of a transmission configuration indicator (TCI) state or a quasi co-location (QCL) relationship; and
using the downlink beam indication for a group of bandwidth parts or component carriers,
wherein the downlink beam indication is received for a first physical downlink shared channel (PDSCH) and for at least one of a first bandwidth part or a first component carrier, and
wherein the downlink beam indication is used for a second PDSCH and for at least one of a second bandwidth part or a second component carrier.