UE capability for performing serving cell based CSI-RS RRM measurements

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

a memory; and

at least one processor coupled to the memory and configured to:

transmit, to a base station, an indication indicating support for reporting one or more serving cell channel state information reference signal (CSI-RS) radio resource management (RRM) measurements without indicating support of non-serving cell CSI-RS RRM measurements;

receive, from the base station, a configuration of layer 3 measurement resources;

perform, based on the configuration of the layer 3 measurement resources, the one or more serving cell CSI-RS RRM measurements; and

transmit, to the base station, the one or more serving cell CSI-RS RRM measurements for a serving cell.

2. The apparatus of claim 1 , wherein the UE transmits, to the base station, the one or more serving cell CSI-RS RRM measurements of the serving cell and not of a non-serving cell.

3. The apparatus of claim 1 , wherein the at least one processor is further configured to:

refrain from indicating a channel state information (CSI) capability that supports measurements for the serving cell and for non-serving cells.

4. The apparatus of claim 1 , wherein the indication is comprised in UE capability information associated with radio resource management (RRM) or mobility.

5. The apparatus of claim 1 , wherein the layer 3 measurement resources comprise one or more CSI-RS for the serving cell and not for a non-serving cell.

6. The apparatus of claim 1 , wherein the layer 3 measurement resources comprise CSI-RS resources for the serving cell and a non-serving cell.

7. The apparatus of claim 6 , wherein the at least one processor is further configured to:

remove, at a higher layer of the UE, the CSI-RS resources for the non-serving cell from the layer 3 measurement resources configured for the UE and providing remaining CSI-RS resources for the serving cell to a lower layer of the UE, wherein the higher layer removes the CSI-RS resources for the non-serving cell based on a cell identifier (ID) for the non-serving cell.

8. The apparatus of claim 6 , wherein the at least one processor is further configured to:

refrain from performing a CSI-RS RRM measurement on the non-serving cell.

9. The apparatus of claim 6 , wherein the at least one processor is further configured to:

perform the one or more serving cell CSI-RS RRM measurements for the serving cell and the non-serving cell, wherein the UE reports the one or more serving cell CSI-RS RRM measurements for the serving cell and not for the non-serving cell.

10. The apparatus of claim 1 , wherein the one or more serving cell CSI-RS RRM measurements include one or more of: a signal to noise ratio (SINR) measurement, a reference signal received quality (RSRQ) measurement, or a reference signal received power (RSRP) measurement.

11. The apparatus of claim 1 , wherein the indication further indicates that the support is for a serving beam of the serving cell, the serving beam being associated with a synchronization signal block (SSB) and a cell identifier (ID), wherein the UE transmits the one or more serving cell CSI-RS RRM measurements for the serving beam of the serving cell and not for a non-serving beam; and wherein the at least one processor is further configured to:

refrain from indicating a channel state information (CSI) capability that supports measurements for non-serving cells or for non-serving beams.

12. The apparatus of claim 11 , wherein the configuration of the layer 3 measurement resources for the serving cell indicates one or more CSI-RS RRM resources associated with the SSB and the cell ID.

13. The apparatus of claim 11 , wherein the configuration of the layer 3 measurement resources for the serving cell further indicates one or more CSI-RS RRM resources associated with one or more non-serving cells.

14. The apparatus of claim 11 , further including a transceiver coupled to the at least one processor, and wherein the at least one processor is further configured to:

prune the one or more CSI-RS RRM resources associated with the non-serving beam based on one or more synchronization signal blocks (SSBs) and the one or more CSI-RS RRM resources associated with the one or more non-serving cells based on one or more cell identifiers (IDs).

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

transmitting, to a base station, an indication indicating support for reporting one or more serving cell channel state information reference signal (CSI-RS) radio resource management (RRM) measurements without indicating support of non-serving cell CSI-RS RRM measurements;

receiving, from the base station, a configuration of layer 3 measurement resources;

performing, based on the configuration of the layer 3 measurement resources, the one or more serving cell CSI-RS RRM measurements; and

transmitting, to the base station, the one or more serving cell CSI-RS RRM measurements for a serving cell.

16. The method of claim 15 , wherein the UE transmits, to the base station, the one or more serving cell CSI-RS RRM measurements of the serving cell and not of a non-serving cell.

17. The method of claim 15 , further comprising:

refraining from indicating a channel state information (CSI) capability that supports measurements for the serving cell and for non-serving cells.

18. The method of claim 15 , wherein the indication is comprised in UE capability information associated with radio resource management (RRM) or mobility.

19. The method of claim 15 , wherein the layer 3 measurement resources comprise one or more CSI-RS for the serving cell and not for a non-serving cell.

20. The method of claim 15 , wherein the layer 3 measurement resources comprise CSI-RS resources for the serving cell and a non-serving cell.

21. The method of claim 20 , further comprising:

removing, at a higher layer of the UE, the CSI-RS resources for the non-serving cell from the layer 3 measurement resources configured for the UE and providing remaining CSI-RS resources for the serving cell to a lower layer of the UE, wherein the higher layer removes the CSI-RS resources for the non-serving cell based on a cell identifier (ID) for the non-serving cell.

22. The method of claim 20 , further comprising:

refraining from performing a CSI-RS RRM measurement on the non-serving cell.

23. The method of claim 20 , further comprising:

performing the one or more serving cell CSI-RS RRM measurements for the serving cell and the non-serving cell, wherein the UE reports the one or more serving cell CSI-RS RRM measurements for the serving cell and not for the non-serving cell.

24. The method of claim 15 , wherein the one or more serving cell CSI-RS RRM measurements include one or more of: a signal to noise ratio (SINR) measurement, a reference signal received quality (RSRQ) measurement, or a reference signal received power (RSRP) measurement.

25. The method of claim 15 , wherein the indication further indicates that the support is for a serving beam of the serving cell, the serving beam being associated with a synchronization signal block (SSB) and a cell identifier (ID), wherein the UE transmits the one or more serving cell CSI-RS RRM measurements for the serving beam of the serving cell and not for a non-serving beam.

26. The method of claim 25 , further comprising:

refraining from indicating a channel state information (CSI) capability that supports measurements for non-serving cells or for non-serving beams.

27. The method of claim 25 , wherein the configuration of the layer 3 measurement resources for the serving cell further indicates one or more CSI-RS RRM resources associated with one or more non-serving cells.

28. The method of claim 27 , further comprising:

pruning the one or more CSI-RS RRM resources associated with the non-serving beam based on one or more synchronization signal blocks (SSBs) and the one or more CSI-RS RRM resources associated with the one or more non-serving cells based on one or more cell identifiers (IDs).

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

a memory; and

at least one processor coupled to the memory and configured to:

receive, from a user equipment (UE), an indication indicating support for reporting one or more serving cell channel state information reference signal (CSI-RS) radio resource management (RRM) measurements without indicating support of non-serving cell CSI-RS RRM measurements;

responsive to receiving the indication, transmit, to the UE, a configuration of layer 3 measurement resources; and

receive, from the UE, the one or more serving cell CSI-RS RRM measurements for a serving cell.

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

receiving, from a user equipment (UE), an indication indicating support for reporting one or more serving cell channel state information reference signal (CSI-RS) radio resource management (RRM) measurements without indicating support of non-serving cell CSI-RS RRM measurements;

responsive to receiving the indication, transmitting, to the UE, a configuration of layer 3 measurement resources; and

receiving, from the UE, the one or more serving cell CSI-RS RRM measurements for a serving cell.