Antenna panel capability determination and indication in wireless communications

1. A method for wireless communication at a user equipment (UE), comprising:

identifying two or more antenna panels for communications with a base station, each antenna panel of the two or more antenna panels configured to transmit a beam of an associated set of beams for communications with the base station;

determining one or more panel-specific capabilities for the two or more antenna panels that are configurable for different panel-specific operations for the communications with the base station, the one or more panel-specific capabilities including a supported number of spatial layers for each of the two or more antenna panels; and

transmitting, to the base station, an indication of the two or more antenna panels and associated panel-specific operations and the supported number of spatial layers for each of the two or more antenna panels.

2. The method of claim 1 , wherein the transmitting comprises:

transmitting an indication that panel specific operation is supported and one or more of a number of antenna panels, a number of beams in the associated set of beams per panel, a number of spatial layers associated with each beam or antenna panel, an indication of beam and panel combinations and corresponding spatial layers, or any combinations thereof.

3. The method of claim 2 , wherein the number of beams in each set of beams correspond to a number of different reference signal resources, different reference signal resource ports, different reference signal resource sets, different spatial relations, different spatial filters, or any combinations thereof.

4. The method of claim 1 , wherein the determining comprises:

determining that simultaneous communications using beams associated with different antenna panels is supported based at least in part on one or more of a hardware configuration of the UE, a predetermined rule for communications via multiple antenna panels, or any combinations thereof.

5. The method of claim 4 , wherein the transmitting comprises:

transmitting, to the base station, an indication that the simultaneous communications using beams associated with different antenna panels is supported by the UE.

6. The method of claim 5 , wherein the indication that the simultaneous communications using beams associated with different antenna panels is supported by the UE comprises one or more of an indication that any beams from any set of different panels support simultaneous communications, an indication that one or more antenna panels do not support simultaneous communications, an indication of a number of panels that can support simultaneous communications and corresponding panel identifications, an indication one or more subsets of each set of beams that support simultaneous communications, or any combinations thereof.

7. The method of claim 5 , further comprising:

receiving configuration information from the base station that enables simultaneous communications via multiple antenna panels; and

initiating a beam training procedure to determine beamforming parameters for a first beam associated with a first antenna panel and a second beam associated with a second antenna panel that are to be used for simultaneous communications with the base station.

8. The method of claim 1 , wherein the determining comprises:

determining that a hardware configuration of the UE does not support simultaneous communications via multiple antenna panels, and wherein the indication transmitted to the base station indicates that simultaneous communications using beams associated with different antenna panels is unsupported by the UE.

9. The method of claim 1 , wherein the determining comprises:

determining a number of supported spatial layers for each antenna panel that supports simultaneous communications and a maximum number of supported spatial layers across all antenna panels that support simultaneous communications; and

wherein the indication transmitted to the base station indicates the number of supported spatial layers for each antenna panel and the maximum number of supported spatial layers.

10. The method of claim 1 , wherein the determining comprises:

determining one or more combinations of spatial layers across each supported combination of antenna panels that support simultaneous communications, and a maximum number of supported spatial layers across all antenna panels that support simultaneous communications; and

wherein the indication transmitted to the base station indicates the one or more combinations of spatial layers and the maximum number of supported spatial layers.

11. The method of claim 1 , wherein the determining and the transmitting are performed separately for each of two or more millimeter wave (mmW) frequency bands.

12. A method for wireless communication at a base station, comprising:

identifying a user equipment (UE) that is to establish communications with the base station using two or more sets of beams associated with two or more antenna panels at the UE;

receiving, from the UE, an indication that indicates the two or more antenna panels one or more associated panel-specific operations of each of the two or more antenna panels, and a supported number of spatial layers for each of the two or more antenna panels;

identifying, based at least in part on the indication from the UE, the two or more antenna panels of the UE for the communications with the base station, each antenna panel of the two or more antenna panels configured to transmit a beam of an associated set of beams for the communications with the base station, and one or more panel-specific capabilities for the two or more antenna panels of the UE that are configurable for different panel-specific operations for communications with the UE, the one or more panel-specific capabilities including the supported number of spatial layers for each of the two or more antenna panels; and

establishing the communications with the UE via one or more beams using one or more of the two or more antenna panels based at least in part on the one or more panel-specific capabilities for the two or more antenna panels.

13. The method of claim 12 , wherein the receiving comprises:

receiving an indication from the UE that simultaneous communications using beams associated with different antenna panels is supported by the UE.

14. The method of claim 13 , wherein the indication that the simultaneous communications using beams associated with different antenna panels is supported by the UE comprises one or more of an indication that any beams from any set of different panels support simultaneous communications, an indication that one or more antenna panels do not support simultaneous communications, an indication of a number of panels that can support simultaneous communications and corresponding panel identifications, an indication one or more subsets of each set of beams that support simultaneous communications, or any combinations thereof.

15. The method of claim 13 , further comprising:

transmitting configuration information to the UE that enables simultaneous communications via multiple antenna panels; and

initiating a beam training procedure to determine beamforming parameters for a first beam associated with a first antenna panel and a second beam associated with a second antenna panel that are to be used for simultaneous communications with the base station.

16. The method of claim 12 , wherein the receiving comprises:

receiving an indication from the UE of one or more combinations of spatial layers across each supported combination of antenna panels that support simultaneous communications and a maximum number of supported spatial layers across all antenna panels that support simultaneous communications.

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

a processor,

a memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

identify two or more antenna panels for communications with a base station, each antenna panel of the two or more antenna panels configured to transmit a beam of an associated set of beams for communications with the base station;

determine one or more panel-specific capabilities for the two or more antenna panels that are configurable for different panel-specific operations for the communications with the base station, the one or more panel-specific capabilities including a supported number of antenna ports for each of the two or more antenna panels; and

transmit, to the base station, an indication of the two or more antenna panels and associated panel-specific operations and the supported number of antenna ports for each of the two or more antenna panels.

18. The apparatus of claim 17 , wherein the instructions are further executable by the processor to cause the apparatus to:

transmit one or more of a number of antenna panels, a number of beams in the associated set of beams per panel, a number of spatial layers associated with each beam or antenna panel, an indication of beam and panel combinations and corresponding spatial layers, or any combinations thereof.

19. The apparatus of claim 18 , wherein the number of beams in each set of beams correspond to a number of different reference signal resources, different reference signal resource ports, different reference signal resource sets, different spatial relations, different spatial filters, or any combinations thereof.

20. The apparatus of claim 17 , wherein the instructions are further executable by the processor to cause the apparatus to:

determine that simultaneous communications using beams associated with different antenna panels is supported based at least in part on one or more of a hardware configuration of the UE, a predetermined rule for communications via multiple antenna panels, or any combinations thereof.

21. The apparatus of claim 20 , wherein the instructions are further executable by the processor to cause the apparatus to:

transmit, the base station, an indication that the simultaneous communications using beams associated with different antenna panels is supported by the UE.

22. The apparatus of claim 21 , wherein the indication that the simultaneous communications using beams associated with different antenna panels is supported by the UE comprises one or more of an indication that any beams from any set of different panels support simultaneous communications, an indication that one or more antenna panels do not support simultaneous communications, an indication of a number of panels that can support simultaneous communications and corresponding panel identifications, an indication one or more subsets of each set of beams that support simultaneous communications, or any combinations thereof.

23. The apparatus of claim 17 , wherein the instructions are further executable by the processor to cause the apparatus to:

determine that a hardware configuration of the UE does not support simultaneous communications via multiple antenna panels, and wherein the indication transmitted to the base station indicates that simultaneous communications using beams associated with different antenna panels is unsupported by the UE.

24. The apparatus of claim 17 , wherein the instructions are further executable by the processor to cause the apparatus to:

determine a number of supported spatial layers for each antenna panel that supports simultaneous communications and a maximum number of supported spatial layers across all antenna panels that support simultaneous communications; and

wherein the indication transmitted to the base station indicates the number of supported spatial layers for each antenna panel and the maximum number of supported spatial layers.

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

a processor,

a memory coupled with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to:

identify a user equipment (UE) that is to establish communications with the base station using two or more sets of beams associated with two or more antenna panels at the UE;

receive, from the UE, an indication that indicates the two or more antenna panels, one or more associated panel-specific operations of each of the two or more antenna panels, and a supported number of antenna ports for each of the two or more antenna panels;

identify, based at least in part on the indication from the UE, the two or more antenna panels of the UE for the communications with the base station, each antenna panel of the two or more antenna panels configured to transmit a beam of an associated set of beams for the communications with the base station, and one or more panel-specific capabilities for the two or more antenna panels of the UE that are configurable for different panel-specific operations for communications with the UE, the one or more panel-specific capabilities including the supported number of antenna ports for each of the two or more antenna panels; and

establish the communications with the UE via one or more beams using one or more of the two or more antenna panels based at least in part on the one or more panel-specific capabilities for the two or more antenna panels.

26. The apparatus of claim 25 , wherein the instructions are further executable by the processor to cause the apparatus to:

receive an indication from the UE of one or more of a number of antenna panels, a number of beams in the associated set of beams per panel, a number of spatial layers associated with each beam or antenna panel, an indication of beam and panel combinations and corresponding spatial layers, or any combinations thereof.

27. The apparatus of claim 25 , wherein the instructions are further executable by the processor to cause the apparatus to:

receive an indication from the UE that the UE does not support simultaneous communications via multiple antenna panels.

28. The apparatus of claim 25 , wherein the instructions are further executable by the processor to cause the apparatus to:

receive an indication from the UE of a number of supported spatial layers for each antenna panel that supports simultaneous communications and a maximum number of supported spatial layers across all antenna panels that support simultaneous communications.

29. The apparatus of claim 25 , wherein the instructions are further executable by the processor to cause the apparatus to:

receive an indication from the UE of one or more combinations of spatial layers across each supported combination of antenna panels that support simultaneous communications and a maximum number of supported spatial layers across all antenna panels that support simultaneous communications.

30. The method of claim 1 , wherein the one or more panel-specific capabilities include a number of resources for sounding reference signal (SRS) beam management for each of the two or more antenna panels, and wherein the transmitting comprises:

transmitting an indication of the number of resources for SRS beam management for each of the two or more antenna panels.