Beam reset in multiple transmit receive point deployments
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information identifying an association between a transmission configuration indicator (TCI) state and a transmit receive point (TRP). The UE may identify a beam failure associated with the TRP. The UE may communicate with one or more network devices to reset a beam associated with the beam failure, for the TCI state, based at least in part on the association between the TCI and the TRP. Numerous other aspects are described.
1. A user equipment (UE) for wireless communication, comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
receive configuration information identifying an association between a transmission configuration indicator (TCI) state and a transmit receive point (TRP);
identify a beam failure associated with the TRP; and
communicate with one or more network devices to reset a beam associated with the beam failure for the TCI state without resetting other beams associated with the TRP, based at least in part on the association between the TCI state and the TRP.
2. The UE of claim 1 , wherein the one or more processors are further configured to:
receive multi downlink control information (m-DCI) identifying the TCI state; and
associate the TCI state with the TRP based at least in part on the configuration information, wherein the configuration information is received via radio resource control (RRC) signaling.
3. The UE of claim 2 , wherein the configuration information includes a control resource set pool identifier that indicates the TRP associated with the TCI state.
4. The UE of claim 1 , wherein the one or more processors are further configured to:
receive a single downlink control information including a TCI codepoint identifying a set of TCI states associated with a set of TRPs; and
associate the TCI state with the TRP based at least in part on an order of the set of TCI states and an order of the set of TRPs.
5. The UE of claim 4 , wherein the one or more processors are further configured to:
receive a beam failure detection reference signal configuration associating a beam failure detection reference signal with the TRP; and
wherein the one or more processors, to identify the beam failure associated with the TRP, are configured to:
identify the beam failure associated with the TRP based at least in part on the beam failure detection reference signal and an association between the beam failure detection reference signal and the TRP.
6. The UE of claim 1 , wherein the one or more processors, to communicate with the one or more network devices to reset the beam, are configured to:
receive a beam failure recovery response (BFRR); and
reset the beam a threshold period of time after receiving the BFRR.
7. The UE of claim 6 , wherein the threshold period of time is based at least in part on a subcarrier spacing of at least one of:
a network device or component carrier to which to send a beam failure recovery response,
a network device or component carrier from which to receive the BFRR,
a network device or component carrier to which to apply a beam reset, or
a network device or component carrier for which the beam failure occurred.
8. The UE of claim 1 , wherein a beam reset applies to a fixed set of channels.
9. The UE of claim 1 , wherein a beam reset applies to a set of channels or reference signals associated with the TCI state.
10. The UE of claim 1 , wherein a beam reset applies to a fixed subset of a set of channels or reference signals associated with the TCI state.
11. The UE of claim 1 , wherein a separate downlink TCI and uplink TCI are activated, and
wherein a reset beam is applied to one or more channels or reference signals of the downlink TCI only.
12. The UE of claim 1 , wherein a separate downlink TCI and uplink TCI are activated, and
wherein a reset beam is applied to one or more channels or reference signals of the downlink TCI and one or more channels or reference signals of the uplink TCI.
13. The UE of claim 1 , wherein the UE is configured to use a statically defined value for a power control configuration for an uplink transmission associated with a reset beam.
14. The UE of claim 1 , wherein the one or more processors, to communicate with the one or more network devices to reset the beam, are configured to:
receive a secondary primary cell beam failure recovery response; and
reset one or more quasi-co-location parameters associated with the TCI state 28 symbols after receiving the secondary primary cell beam failure recovery response.
15. The UE of claim 14 , wherein a spatial filter for a physical random access channel transmission is applied to one or more channels or reference signals associated with the TCI state.
16. A network device for wireless communication, comprising:
a memory; and
one or more processors, coupled to the memory, configured to:
transmit configuration information identifying an association between a transmission configuration indicator (TCI) state and a transmit receive point (TRP); and
communicate with a user equipment (UE) to reset a beam associated with a beam failure for the TCI state without resetting other beams associated with the TRP, based at least in part on the association between the TCI state and the TRP.
17. The network device of claim 16 , wherein the one or more processors, to communicate with the UE to reset the beam, are configured to:
transmit a beam failure recovery response (BFRR), wherein the beam is reset a threshold period of time after transmitting the BFRR.
18. The network device of claim 16 , wherein a beam reset applies to a fixed subset of a set of channels or reference signals associated with the TCI state.
19. The network device of claim 16 , wherein a separate downlink TCI and uplink TCI are activated, and
wherein a reset beam is applied to one or more channels or reference signals of the downlink TCI only.
20. A method of wireless communication performed by a user equipment (UE), comprising:
receiving configuration information identifying an association between a transmission configuration indicator (TCI) state and a transmit receive point (TRP);
identifying a beam failure associated with the TRP; and
communicating with one or more network devices to reset a beam associated with the beam failure for the TCI state without resetting other beams associated with the TRP, based at least in part on the association between the TCI state and the TRP.