Joint beam failure detection

1. A method of wireless communication performed by a user equipment (UE), comprising:

detecting a beam failure detection reference signal for a first component carrier of a group of component carriers, wherein the beam failure detection reference signal is a quasi-co-location type-D reference signal corresponding to each unique quasi-co-location type-D source, of a plurality of component carriers, configured on a single component carrier of the group of component carriers, and wherein at least one second component carrier, of the group of component carriers, and the first component carrier share a quasi-co-location parameter; and

initiating a beam failure recovery procedure for the first component carrier and the at least one second component carrier based at least in part on a measurement of the beam failure detection reference signal and identifying the at least one second component carrier associated with the beam failure detection reference signal.

2. The method of claim 1 , further comprising:

determining that the measurement of the beam failure detection reference signal satisfies a threshold indicating a beam failure for the first component carrier; and

wherein initiating the beam failure recovery procedure comprises:

initiating the beam failure recovery procedure based at least in part on determining that the measurement of the beam failure detection reference signal satisfies the threshold.

3. The method of claim 1 , further comprising:

monitoring resources of the group of component carriers; and

wherein detecting the beam failure detection reference signal for the first component carrier comprises:

detecting the beam failure detection reference signal for the first component carrier based at least in part on monitoring the resources across the group of component carriers.

4. The method of claim 1 , further comprising:

receiving signaling identifying the group of component carriers; and

determining the at least one second component carrier based at least in part on the signaling identifying the group of component carriers.

5. The method of claim 4 , wherein the base station signaling is at least one of:

radio resource control signaling,

medium access control (MAC) control element signaling,

downlink control information signaling, or

beam update signaling.

6. The method of claim 1 , further comprising:

receiving signaling that configures monitoring for the beam failure detection reference signal; and

wherein receiving the beam failure detection reference signal comprises:

receiving the beam failure detection reference signal based at least in part on the signaling that configures monitoring for the beam failure detection reference signal.

7. The method of claim 6 , wherein the signaling is at least one of:

radio resource control signaling,

medium access control (MAC) control element signaling,

downlink control information signaling, or

beam update signaling.

8. The method of claim 1 , further comprising:

determining a configuration for monitoring for the beam failure detection reference signal based at least in part on a control resource set (CORESET) transmission control indicator (TCI) state for the group of component carriers; and

wherein receiving the beam failure detection reference signal comprises:

receiving the beam failure detection reference signal based at least in part on the configuration for monitoring for the beam failure detection reference signal.

9. The method of claim 8 , wherein a TCI state, of the TCI states, for a CORESET is configured for only one reference signal; and

wherein each unique reference signal in each CORESET TCI state is a beam failure detection reference signal.

10. The method of claim 8 , wherein a TCI state, of the TCI states, for a CORESET is configured for a plurality of reference signals; and

wherein the quasi-co-location type-D reference signal is in CORESET TCI state of the TCI states.

11. The method of claim 1 , wherein the beam failure detection reference signal is selected, from a plurality of candidate beam failure detection reference signals, based at least in part on a rule.

12. The method of claim 1 , further comprising:

receiving signaling indicating that the UE is to monitor for the beam failure detection reference signal on a subset of the group of component carriers, wherein the subset of the group of component carriers includes the first component carrier; and

monitoring, to receive the beam failure detection reference signal on the subset of the group of component carriers, based at least in part on the signaling; and

wherein receiving the beam failure detection reference signal comprises:

receiving the beam failure detection reference signal based at least in part on monitoring to receive the beam failure detection reference signal on the subset of the group of component carriers.

13. A method of wireless communication performed by a base station (BS), comprising:

transmitting, to a user equipment (UE), a beam failure detection reference signal on a first component carrier of a group of component carriers that share a quasi-co-location parameter, wherein the beam failure detection reference signal is a quasi-co-location type-D reference signal corresponding to each unique quasi-co-location type-D source, of a plurality of component carriers, configured on a single component carrier of the group of component carriers; and

communicating with the UE to initiate a beam failure recovery procedure for the first component carrier and at least one second component carrier, of the group of component carriers, based at least in part on transmitting the beam failure detection reference signal on the first component carrier.

14. The method of claim 13 , further comprising:

forgoing transmission of another beam failure detection reference signal using the at least one second component carrier, based at least in part on determining the beam failure detection reference signal of the first component carrier, to enable detection of the beam failure for the first component carrier and the at least one second component carrier.

15. The method of claim 13 , further comprising:

transmitting, to the UE, signaling identifying the group of component carriers, to enable detection of the beam failure for the at least one second component carrier.

16. The method of claim 15 , wherein the signaling is at least one of:

radio resource control signaling,

medium access control (MAC) control element signaling,

downlink control information signaling, or

beam update signaling.

17. The method of claim 13 , further comprising:

transmitting, to the UE, signaling that configures monitoring for the beam failure detection reference signal on the first component carrier to enable detection of the beam failure for the at least one second component carrier.

18. The method of claim 17 , wherein the signaling is at least one of:

radio resource control signaling,

medium access control (MAC) control element signaling,

downlink control information signaling, or

beam update signaling.

19. The method of claim 13 , further comprising:

determining transmission control indicator (TCI) states for the group of component carriers; and

determining a configuration for transmitting the beam failure detection reference signal based at least in part on the TCI states for the group of component carriers; and

wherein transmitting the beam failure detection reference signal comprises:

transmitting the beam failure detection reference signal based at least in part on the configuration for transmitting the beam failure detection reference signal.

20. The method of claim 19 , wherein a TCI state, of the TCI states, for a control resource set (CORESET) is configured for only one reference signal; and

wherein each unique reference signal in each CORESET TCI state is a beam failure detection reference signal.

21. The method of claim 19 , wherein a TCI state, of the TCI states, for a control resource set (CORESET) is configured for a plurality of reference signals; and

wherein the quasi-co-location type-D reference signal is in a CORESET TCI state of the TCI states.

22. The method of claim 13 , further comprising:

selecting the beam failure detection reference signal, from a plurality of candidate beam failure detection reference signals, based at least in part on a rule.

23. The method of claim 13 , further comprising:

transmitting, to the UE, signaling indicating that the UE is to monitor for the beam failure detection reference signal on a subset of the group of component carriers, wherein the subset of the group of component carriers includes the first component carrier.

24. A user equipment (UE) for wireless communication, comprising:

a memory; and

one or more processors coupled to the memory, the one or more processors configured to:

detect a beam failure detection reference signal for a first component carrier of a group of component carriers, wherein the beam failure detection reference signal is a quasi-co-location type-D reference signal corresponding to each unique quasi-co-location type-D source, of a plurality of component carriers, configured on a single component carrier of the group of component carriers, and wherein at least one second component carrier, of the group of component carriers, and the first component carrier share a quasi-co-location parameter; and

initiate a beam failure recovery procedure for the first component carrier and the at least one second component carrier based at least in part on a measurement of the beam failure detection reference signal and identifying the at least one second component carrier associated with the beam failure detection reference signal.

25. A base station (BS) for wireless communication, comprising:

a memory; and

one or more processors coupled to the memory, the one or more processors configured to:

transmit, to a user equipment (UE), a beam failure detection reference signal on a first component carrier of a group of component carriers that share a quasi-co-location parameter, wherein the beam failure detection reference signal is a quasi-co-location type-D reference signal corresponding to each unique quasi-co-location type-D source, of a plurality of component carriers, configured on a single component carrier of the group of component carriers; and

communicate with the UE to initiate a beam failure recovery procedure for the first component carrier and at least one second component carrier, of the group of component carriers, based at least in part on transmitting the beam failure detection reference signal on the first component carrier.

26. The BS of claim 25 , wherein the one or more processors are further configured to:

forgo transmission of another beam failure detection reference signal using the at least one second component carrier, based at least in part on determining the beam failure detection reference signal of the first component carrier, to enable detection of the beam failure for the first component carrier and the at least one second component carrier.

27. The UE of claim 24 , wherein the one or more processors are further configured to:

receive signaling identifying the group of component carriers; and

determine the at least one second component carrier based at least in part on the signaling identifying the group of component carriers.

28. The UE of claim 24 , wherein the one or more processors are further configured to:

receive signaling indicating that the UE is to monitor for the beam failure detection reference signal on a subset of the group of component carriers, wherein the subset of the group of component carriers includes the first component carrier; and

monitor, to receive the beam failure detection reference signal on the subset of the group of component carriers, based at least in part on the signaling.

29. The BS of claim 25 , wherein the one or more processors are further configured to:

transmit, to the UE, signaling identifying the group of component carriers, to enable detection of the beam failure for the at least one second component carrier.

30. The BS of claim 25 , wherein the one or more processors are further configured to:

transmit, to the UE, signaling that configures monitoring for the beam failure detection reference signal on the first component carrier to enable detection of the beam failure for the at least one second component carrier.