Relations between beam group beam failure recovery and cell level beam failure recovery

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

receiving, from a base station (BS), a communication indicating a beam failure configuration, the beam failure configuration including at least one of a beam failure parameter of a beam group or a beam failure parameter of a cell, wherein the at least one of the beam failure parameter of the beam group or the beam failure parameter of the cell is associated with a cell-level triggering condition or a beam group-specific triggering condition for initiating a beam failure recovery (BFR) procedure; and

detecting, in a serving cell based at least in part on the beam failure configuration, a beam failure.

2. The method of claim 1 , wherein:

the beam failure configuration includes the beam failure parameter of the beam group and does not include the beam failure parameter of the cell; and

the detecting the beam failure comprises detecting the beam failure based on the beam failure parameter of the beam group.

3. The method of claim 2 , wherein the beam failure parameter of the beam group comprises at least one of a transmission-reception point (TRP)-specific beam failure detection (BFD) parameter or a TRP-specific BFR parameter.

4. The method of claim 2 , wherein:

the beam failure configuration includes a plurality of TRP-specific beam failure parameters associated with a plurality of TRPs; and

the detecting the beam failure comprises independently monitoring for beam for each of the plurality of TRPs.

5. The method of claim 1 , wherein:

the beam failure configuration includes the beam failure parameter of the cell and does not include the beam failure parameter of the beam group.

6. The method of claim 5 , wherein the beam failure parameter of the cell comprises at least one of a cell-level BFD parameter or a cell-level BFR parameter.

7. The method of claim 1 , wherein:

the beam failure configuration includes the beam failure parameter of the beam group and the beam failure parameter of the cell; and

the beam failure parameter of the beam group includes a beam group-specific BFD parameter and the beam failure parameter of the cell includes a cell-level BFD parameter.

8. The method of claim 7 , wherein the detecting the beam failure comprises:

performing a first BFD based on the beam group-specific BFD parameter; and

performing a second BFD based on the cell-level BFD parameter.

9. The method of claim 8 , wherein the beam failure configuration includes a beam group-specific BFR parameter and does not include a cell-level BFR parameter, the method further comprising:

performing a BFR, in response to performing the first BFD, based on the beam group-specific BFR parameter.

10. The method of claim 8 , wherein the beam failure configuration includes a cell-level BFR parameter and does not include a beam group-specific BFR parameter, the method further comprising:

performing, in response to the performing the second BFD, a BFR based on the cell-level BFR parameter.

11. The method of claim 8 , wherein:

the performing the first BFD based on the beam group-specific beam failure detection parameter comprises monitoring for at least one TRP-specific BFD reference signal (RS); and

the performing the second BFD based on the cell-level BFD parameter comprises monitoring for at least one cell-level BFD RS.

12. The method of claim 7 , wherein:

the beam failure parameter of the beam group includes a TRP-specific BFD parameter and a TRP-specific BFR parameter; and

the detecting the beam failure comprises performing a BFD based on the TRP-specific BFD parameter, the method further comprising:

performing, in response to the BFD indicating the beam failure, a BFR based on the TRP-specific BFR parameter.

13. The method of claim 7 , wherein:

the beam group-specific BFD parameter includes a TRP-specific BFD parameter;

the cell-level BFD parameter includes a cell-level BFR parameter; and

the detecting the beam failure comprises performing a BFD based on the TRP-specific BFD parameter, the method further comprising:

performing, in response to the BFD indicating a beam failure, a BFR based on the cell-level BFR parameter.

14. The method of claim 7 , wherein:

the beam group-specific BFD parameter includes a TRP-specific BFD parameter and a TRP-specific BFR parameter;

the cell-level BFD parameter includes a cell-level BFD parameter and a cell-level BFR parameter; and

the detecting the beam failure comprises:

performing a first BFD based on the TRP-specific BFD parameter; and

performing a second BFD based on the cell-level BFD parameter.

15. The method of claim 14 , further comprising at least one of:

performing, in response to the first BFD indicating the beam failure, a first BFR based on the TRP-specific BFR parameter; or

performing, in response to the second BFD indicating the beam failure, a second BFR based on the cell-level BFR parameter.

16. The method of claim 1 , wherein:

the beam failure configuration includes a plurality of TRP-specific beam failure parameters associated with a plurality of TRPs; and

the detecting the beam failure comprises:

performing a BFD for each of the plurality of TRPs; and

performing, based on a number of BFDs indicating the beam failure, a BFR.

17. The method of claim 16 , wherein the performing the BFR comprises:

performing, in response to the number being less than a first threshold, a TRP-specific BFR;

performing, in response to the number being greater than a second threshold, a cell-level BFR; or

disallowing the cell-level BFR when a threshold number of working TRPs is exceeded.

18. The method of claim 16 , further comprising:

receiving, from the base station of the serving cell, an indication of at least one threshold value for determining whether to perform a TRP-specific BFR or a cell-level BFR.

19. The method of claim 18 , wherein further comprises:

performing, in response to detection of the beam failure, a cell-level BFR; and

terminating any active TRP-specific BFRs.

20. The method of claim 7 , wherein:

the beam group-specific BFD parameter includes a plurality of TRP-specific beam failure parameters associated with a plurality of TRPs; and

the detecting the beam failure comprises performing a BFD for each of the plurality of TRPs, the method further comprising:

performing, based on a number of BFDs indicating the beam failure, a recovery.

21. The method of claim 20 , wherein:

the cell-level BFD parameter includes a radio-link failure (RLF) parameter; and

the performing the recovery comprises:

performing, in response to the number being less than a first threshold, a TRP-specific BFR;

performing, in response to the number being greater than a second threshold, an RLF recovery based on the RLF parameter; or

disallowing an RLF recovery when a threshold number of working TRPs is exceeded.

22. The method of claim 20 , further comprising:

receiving, from the base station, an indication of at least one threshold value for determining whether to perform a TRP-specific BFR or an RLF recovery.

23. The method of claim 20 , wherein the performing the recovery includes:

performing an RLF recovery; and

terminating any active TRP-specific BFR.

24. The method of claim 7 , wherein detecting the beam failure comprises:

performing a BFD based on the beam group-specific BFD parameter; and

performing a RLM based on the cell-level BFD parameter.

25. The method of claim 24 , wherein:

the performing the BFD based on the beam group-specific beam failure detection parameter comprises monitoring for at least one transmission-reception point (TRP)-specific BFD reference signal (RS); and

the performing the RLM based on the cell-level beam failure detection parameter comprises monitoring for at least one RLM RS.

26. The method of claim 7 , further comprising:

triggering a radio link failure (RLF) recovery;

performing, following the triggering of the RLF recovery, a plurality of transmission-reception point (TRP)-specific BFDs; and

adjusting, based on a consecutive number of the TRP-specific BFDs indicating the beam failure exceeding a threshold, a timer associated with the RLF recovery.

27. The method of claim 26 , wherein:

the adjusting the timer includes increasing or decreasing the timer by at least one of a predetermined amount of time or a percentage of a duration of the timer; or

the adjusting the timer includes adjusting the timer based on a number of TRPs associated with the TRP-specific BFDs indicating the beam failure.

28. A user equipment (UE), comprising:

a memory;

a processor coupled to the memory; and

a transceiver coupled to the processor and configured to:

receive, from a base station (BS), a communication indicating a beam failure configuration, the beam failure configuration including at least one of a beam failure parameter of a beam group or a beam failure parameter of a cell, wherein the at least one of the beam failure parameter of the beam group or the beam failure parameter of the cell is associated with a cell-level triggering condition or a beam group-specific triggering condition for initiating a beam failure recovery (BFR) procedure, wherein the processor is configured to:

detect, in a serving cell based at least in part on the beam failure configuration, a beam failure.

29. A non-transitory computer-readable medium having program code recorded thereon for operation on a user equipment (UE), the program code comprising:

code for causing a UE to receive, from a base station (BS), a communication indicating a beam failure configuration, the beam failure configuration including at least one of a beam failure parameter of a beam group or a beam failure parameter of a cell, wherein the at least one of the beam failure parameter of the beam group or the beam failure parameter of the cell is associated with a cell-level triggering condition or a beam group-specific triggering condition for initiating a beam failure recovery (BFR) procedure; and

code for causing the UE to detect, in a serving cell based at least in part on the beam failure configuration, a beam failure.

30. A user equipment (UE), comprising:

means for receiving, from a base station (BS), a communication indicating a beam failure configuration, the beam failure configuration including at least one of a beam failure parameter of a beam group or a beam failure parameter of a cell, wherein the at least one of the beam failure parameter of the beam group or the beam failure parameter of the cell is associated with a cell-level triggering condition or a beam group-specific triggering condition for initiating a beam failure recovery (BFR) procedure; and

means for detecting, in a serving cell based at least in part on the beam failure configuration, a beam failure.