Methods and apparatus for beam failure detection

1. A method of wireless communication, comprising:

receiving a beam failure detection (BFD) reference signal (RS) configuration;

detecting an absence of a configured and quasi-co-located BFD RS associated with the BFD RS configuration in at least one monitored control resource set (CORESET), wherein detecting the absence comprises detecting an incomplete configuration of the configured and quasi-co-located BFD RS; and

utilizing one or more RSs indicated in a CORESET transmission configuration indicator (ICI) state for beam failure detection.

2. The method of claim 1 , wherein the at least one monitored CORESET is configured by one or more medium access control (MAC) control elements (CEs).

3. The method of claim 1 , wherein the incomplete configuration is caused by a radio resource control (RRC) configuration latency.

4. The method of claim 3 , further comprises:

receiving at least one MAC CE; and

configuring the at least one monitored CORESET or the configured and quasi-co-located BFD RS to reduce the RRC configuration latency.

5. The method of claim 4 , wherein configuring the at least one monitored CORESET or the configured and quasi-co-located BFD RS comprises configuring the at least one monitored CORESET or the configured and quasi-co-located BFD RS in a same frame or different frames.

6. The method of claim 1 , wherein detecting the absence comprises determining a number of the at least one monitored CORESET is larger than a number of the BFD RS.

7. A method of wireless communication, comprising:

receiving a beam failure detection (BFD) reference signal (RS) configuration;

detecting an absence of a configured and quasi-co-located BFD RS associated with the BFD RS configuration in at least one monitored control resource set (CORESET), wherein detecting the absence comprises detecting an incomplete configuration of the configured and quasi-co-located BFD RS; and

utilizing one or more demodulation RSs of the at least one monitored CORESET or decoding statistics of a physical downlink control channel (PDCCH) carried by the at least one monitored CORESET to evaluate a CORESET quality for beam failure detection.

8. The method of claim 7 , wherein the at least one monitored CORESET is configured by one or more medium access control (MAC) control element (CE).

9. The method of claim 7 , wherein the incomplete configuration is caused by a radio resource control (RRC) configuration latency.

10. The method of claim 9 , further comprises:

receiving at least one MAC CE; and

configuring the at least one monitored CORESET or the configured and quasi-co-located BFD RS to reduce the RRC configuration latency.

11. The method of claim 10 , wherein configuring the at least one monitored CORESET or the configured and quasi-co-located BFD RS comprises configuring the at least one monitored CORESET or the configured and quasi-co-located BFD RS in a same frame or different frames.

12. The method of claim 7 , wherein detecting the absence comprises determining a number of the at least one monitored CORESET is larger than a number of the BFD RS.

13. A method of wireless communication, comprising:

receiving a beam failure detection (BFD) reference signal (RS) configuration;

waiting until a configuration of a corresponding quasi-co-located BFD RS in a monitored control resource set (CORESET) is complete; and

utilizing the corresponding quasi-co-located BFD RS for beam failure detection in response to a completion of the configuration of the corresponding quasi-co-located BFD RS in the monitored CORESET.

14. The method of claim 13 , further comprising:

configuring, prior to utilizing the corresponding quasi-co-located BFD RS, at least one monitored CORESET or the corresponding quasi-co-located BFD RS using one or more medium access control (MAC) control elements (CEs).

15. The method of claim 14 , wherein configuring the at least one monitored CORESET or the corresponding quasi-co-located BFD RS comprises configuring the at least one monitored CORESET or the corresponding quasi-co-located BFD RS in a same frame or different frames.

16. A user equipment, comprising:

a memory;

a transceiver;

one or more processors operatively coupled with the memory and the transceiver, the one or more processors configured to perform the steps of:

receiving, via the transceiver, a beam failure detection (BFD) reference signal (RS) configuration;

detecting an absence of a configured and quasi-co-located BFD RS associated with the BFD RS configuration in at least one monitored control resource set (CORESET), wherein detecting the absence comprises detecting an incomplete configuration of the configured and quasi-co-located BFD RS; and

utilizing one or more RSs indicated in a CORESET transmission configuration indicator (TCI) state for beam failure detection.

17. The user equipment of claim 16 , wherein the at least one monitored CORESET is configured by one or more medium access control (MAC) control elements (CEs).

18. The user equipment of claim 16 , wherein the incomplete configuration is caused by a radio resource control (RRC) configuration latency.

19. The user equipment of claim 18 , wherein the one or more processor is configured to perform the steps of:

receiving at least one MAC CE; and

configuring the at least one monitored CORESET or the configured and quasi-co-located BFD RS to reduce the RRC configuration latency.

20. The user equipment of claim 19 , wherein configuring the at least one monitored CORESET or the configured and quasi-co-located BFD RS comprises configuring the at least one monitored CORESET or the configured and quasi-co-located BFD RS in a same frame or different frames.

21. The user equipment of claim 16 , wherein detecting the absence comprises determining a number of the at least one monitored CORESET is larger than a number of the BFD RS.