Derivation of resource locations for full duplex beam failure detection

1. An apparatus for wireless communication at a user equipment (UE), comprising:

at least one memory; and

one or more processors coupled to the at least one memory, the one or more processors being configured to:

receive a control resource set (CORESET) configuration for a full duplex CORESET;

perform a measurement for full duplex operation based on at least one of a downlink beam or an uplink beam for full duplex beam failure detection having one or more quasi co-location (QCL) relationships to one or more transmission configuration indication (TCI) states of the full duplex CORESET and based on an absence of a configuration of a reference signal for the full duplex beam failure detection;

determine at least one downlink reference signal for the full duplex beam failure detection based on the downlink beam having a QCL type D relationship to the one or more TCI states of the full duplex CORESET; and

determine the uplink beam is paired with the downlink beam having the QCL type D relationship to the one or more TCI states of the full duplex CORESET.

2. The apparatus of claim 1 , wherein the uplink beam is based on an uplink TCI state indicated by a downlink reference signal, and an SRS resource identifier (ID) beam corresponds to the uplink TCI state.

3. The apparatus of claim 1 , wherein the full duplex CORESET is associated with a plurality of TCI states, wherein a plurality of uplink beams are associated with uplink TCI states indicated by downlink reference signals, and SRS resource identifier (ID) beams correspond to the uplink TCI states.

4. The apparatus of claim 1 , wherein the uplink beam is based on an uplink TCI state indicated by a SRS resource identifier (ID) beam.

5. The apparatus of claim 1 , wherein the full duplex CORESET is associated with a plurality of TCI states, and wherein a plurality of uplink beams are based on uplink TCI states indicated by a plurality of SRS resource identifier (ID) beams.

6. The apparatus of claim 1 , wherein the one or more processors are further configured to:

transmit a sounding reference signal (SRS) on the uplink beam, wherein the measurement for the full duplex beam failure detection includes a self-interference measurement based on transmission of the SRS on an associated downlink beam.

7. The apparatus of claim 6 , wherein the measurement includes a layer 1 (L1) signal to interference and noise ratio (SINR) measurement for full duplex communication.

8. The apparatus of claim 7 , wherein the L1 SINR measurement includes a channel measurement based on a channel state information reference signal (CSI-RS) and the self-interference measurement based on the SRS.

9. The apparatus of claim 6 , wherein the one or more processors are further configured to:

report a beam failure to a base station based on the measurement.

10. The apparatus of claim 6 , wherein the self-interference measurement is during a latest SRS resource location.

11. The apparatus of claim 6 , wherein the self-interference measurement is during a measurement gap configured by a base station for the self-interference measurement.

12. A method of wireless communication at a user equipment (UE), comprising:

receiving a control resource set (CORESET) configuration for a full duplex CORESET;

performing a measurement for full duplex operation based on at least one of a downlink beam or an uplink beam for full duplex beam failure detection having one or more quasi co-location (QCL) relationships to one or more transmission configuration indication (TCI) states of the full duplex CORESET and based on an absence of a configuration of a reference signal for the full duplex beam failure detection;

determining at least one downlink reference signal for the full duplex beam failure detection based on the downlink beam having a QCL type D relationship to the one or more TCI states of the full duplex CORESET; and

determining the uplink beam is paired with the downlink beam having the QCL type D relationship to the one or more TCI states of the full duplex CORESET.

13. The method of claim 12 , wherein the uplink beam is based on an uplink TCI state indicated by a downlink reference signal, and an SRS resource identifier (ID) beam corresponds to the uplink TCI state.

14. The method of claim 12 , wherein the full duplex CORESET is associated with a plurality of TCI states, wherein a plurality of uplink beams are associated with uplink TCI states indicated by downlink reference signals, and SRS resource identifier (ID) beams correspond to the uplink TCI states.

15. The method of claim 12 , wherein the uplink beam is based on an uplink TCI state indicated by a SRS resource identifier (ID) beam.

16. The method of claim 12 , wherein the full duplex CORESET is associated with a plurality of TCI states, and wherein a plurality of uplink beams are based on uplink TCI states indicated by a plurality of SRS resource identifier (ID) beams.

17. The method of claim 12 , wherein the method comprises:

transmitting a sounding reference signal (SRS) on the uplink beam, wherein the measurement for the full duplex beam failure detection includes self-interference measurement based on transmission of the SRS on an associated downlink beam.

18. The method of claim 17 , wherein the measurement includes a layer 1 (L1) signal to interference and noise ratio (SINR) measurement for full duplex communication.

19. The method of claim 17 , wherein method comprises:

reporting a beam failure to a base station based on the measurement.

20. The method of claim 17 , wherein the self-interference measurement is during a latest SRS resource location.

21. The method of claim 17 , wherein the self-interference measurement is during a measurement gap configured by a base station for the self-interference measurement.

22. An apparatus for wireless communication at a base station, comprising:

at least one memory; and

one or more processors coupled to the at least one memory, the one or more processors being configured to:

configure a full duplex control resource set (CORESET) for a user equipment (UE) associated with one or more transmission configuration indication (TCI) states; and

receive an indication of a beam failure for full duplex communication at the UE based on at least one downlink beam or at least one uplink beam having one or more quasi co-location (QCL) relationships to the one or more TCI states of the full duplex CORESET,

wherein the indication of the beam failure is based on at least one downlink reference signal for full duplex beam failure detection that is based on the at least one downlink beam having a QCL type D relationship to the one or more TCI states of the full duplex CORESET,

wherein the indication of the beam failure is further based on the at least one uplink beam paired with the at least one downlink beam having the QCL type D relationship to the one or more TCI states of the full duplex CORESET.

23. The apparatus of claim 22 , wherein the one or more processors are further configured to:

configure a measurement gap for the UE to perform a self-interference measurement.

24. A method of wireless communication at a base station, comprising:

configuring a full duplex control resource set (CORESET) for a user equipment (UE) associated with one or more transmission configuration indication (TCI) states; and

receiving an indication of a beam failure for full duplex communication at the UE based on at least one downlink beam or at least one uplink beam having one or more quasi co-location (QCL) relationships to the one or more TCI states of the full duplex CORESET,

wherein the indication of the beam failure is based on at least one downlink reference signal for full duplex beam failure detection that is based on the at least one downlink beam having a QCL type D relationship to the one or more TCI states of the full duplex CORESET,

wherein the indication of the beam failure is further based on the at least one uplink beam paired with the at least one downlink beam having the QCL type D relationship to the one or more TCI states of the full duplex CORESET.

25. The method of claim 24 , wherein the method comprises: configuring a measurement gap for the UE to perform a self-interference measurement.