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 beam indication including a spatial relation for a first component carrier, the first component carrier comprising a first set of bandwidth parts; and
using the spatial relation:
for a first sounding reference signal (SRS) resource on at least one bandwidth part of the first set of bandwidth parts, and
for a second SRS resource on a bandwidth part of a second set of bandwidth parts corresponding to a second component carrier, wherein the spatial relation does not identify the second component carrier.
2. The method of claim 1 , wherein the beam indication is stored in a configuration or activated for use.
3. The method of claim 1 , wherein the beam indication is an uplink beam indication.
4. The method of claim 1 , wherein the spatial relation identifies the first component carrier and the at least one bandwidth part of the first set of bandwidth parts.
5. The method of claim 1 , wherein the spatial relation is configured for all bandwidth parts corresponding to the first set of bandwidth parts and the second set of bandwidth parts, the first set of bandwidth parts including a first plurality of bandwidth parts and the second set of bandwidth parts including a second plurality of bandwidth parts.
6. The method of claim 1 , wherein the beam indication is received in a single media access control (MAC) control element (MAC-CE).
7. A method of wireless communication performed by a user equipment (UE), comprising:
receiving an indication including a spatial relation for a first component carrier, the first component carrier comprising a first set of bandwidth parts,
wherein the indication indicates multiple physical uplink control channel (PUCCH) resources using a component carrier identifier for the first component carrier; and
applying the spatial relation:
to a first PUCCH resource, of the multiple PUCCH resources, on at least one bandwidth part of the first set of bandwidth parts, and
to a second PUCCH resource on a bandwidth part of a second set of bandwidth parts corresponding to a second component carrier,
wherein the indication is activated for at least one of:
a first sounding reference signal (SRS) resource on the at least one bandwidth part of the first set of bandwidth parts, or
a second SRS resource on the bandwidth part of the second set of bandwidth parts.
8. The method of claim 7 , wherein the multiple PUCCH resources are indicated further using:
a PUCCH resource identifier, or
a bandwidth part identifier.
9. The method of claim 7 ,
wherein the multiple PUCCH resources are indicated using:
information corresponding to a plurality of the multiple PUCCH resources,
a single bandwidth part identifier, and
a single component carrier identifier, and
wherein the single component carrier identifier is the component carrier identifier.
10. The method of claim 7 , 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 10 , wherein the single MAC-CE applies to all PUCCH resources on the at least one bandwidth part.
13. The method of claim 10 , wherein the single MAC-CE applies to PUCCH resources other than that indicated by the component carrier identifier.
14. The method of claim 7 , wherein the spatial relation is configured for all bandwidth parts corresponding to the first set of bandwidth parts and the second set of bandwidth parts, the first set of bandwidth parts including a first plurality of bandwidth parts and the second set of bandwidth parts including a second plurality of bandwidth parts.
15. A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors, coupled to the memory, configured to cause the UE to:
receive a beam indication including a spatial relation for a first component carrier, the first component carrier comprising a first set of bandwidth parts; and
use the spatial relation:
for a first sounding reference signal (SRS) resource on at least one bandwidth part of the first set of bandwidth parts, and
for a second SRS resource on a bandwidth part of a second set of bandwidth parts corresponding to a second component carrier, wherein the spatial relation does not identify the second component carrier.
16. The UE of claim 15 , wherein the beam indication is stored in a configuration or activated for use.
17. The UE of claim 15 , wherein the beam indication is an uplink beam indication.
18. The UE of claim 15 , wherein the spatial relation identifies the first component carrier and the at least one bandwidth part of the first set of bandwidth parts.
19. The UE of claim 15 , wherein the spatial relation is configured for all bandwidth parts corresponding to the first set of bandwidth parts and the second set of bandwidth parts, the first set of bandwidth parts including a first plurality of bandwidth parts and the second set of bandwidth parts including a second plurality of bandwidth parts.
20. The UE of claim 15 , wherein the beam indication is received in a single media access control (MAC) control element (MAC-CE).
21. A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors, coupled to the memory, configured to cause the UE to:
receive an indication including a spatial relation for a first component carrier, the first component carrier comprising a first set of bandwidth parts,
wherein the indication indicates multiple physical uplink control channel (PUCCH) resources using a component carrier identifier for the first component carrier; and
apply the spatial relation:
to a first PUCCH resource, of the multiple PUCCH resources, on at least one bandwidth part of the first set of bandwidth parts, and
to a second PUCCH resource on a bandwidth part of a second set of bandwidth parts corresponding to a second component carrier,
wherein the indication is activated for at least one of:
a first sounding reference signal (SRS) resource on the at least one bandwidth part of the first set of bandwidth parts, or
a second SRS resource on the bandwidth part of the second set of bandwidth parts.
22. The UE of claim 21 , wherein the multiple PUCCH resources are indicated further using:
a PUCCH resource identifier, or
a bandwidth part identifier.
23. The UE of claim 21 ,
wherein the multiple PUCCH resources are indicated using:
information corresponding to a plurality of the multiple PUCCH resources,
a single bandwidth part identifier, and
a single component carrier identifier, and
wherein the single component carrier identifier is the component carrier identifier.
24. The UE of claim 21 , wherein the indication is received in a single media access control (MAC) control element (MAC-CE).
25. The UE of claim 24 , wherein the single MAC-CE has a variable length.
26. The UE of claim 24 , wherein the single MAC-CE applies to all PUCCH resources on the at least one bandwidth part.
27. The UE of claim 24 , wherein the single MAC-CE applies to PUCCH resources other than that indicated by the component carrier identifier.
28. The UE of claim 21 , wherein the indication is an uplink beam indication.
29. The UE of claim 21 , wherein the spatial relation is configured for all bandwidth parts corresponding to the first set of bandwidth parts and the second set of bandwidth parts, the first set of bandwidth parts including a first plurality of bandwidth parts and the second set of bandwidth parts including a second plurality of bandwidth parts.