Capability information for sounding reference signal improvements

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

at least one processor configured to:

transmit, to a base station (BS), capability information related to a time gap for one or more switching procedures associated with additional sounding reference signal (SRS) transmissions in a normal uplink (UL) subframe, including at least one of an antenna switching procedure, a frequency hopping procedure, or a power change procedure;

receive SRS configuration information, wherein:

the SRS configuration information comprises an SRS transmission pattern supported by the UE, and

the SRS transmission pattern supported by the UE is based, at least in part, on the time gap for at least one of the antenna switching procedure, the frequency hopping procedure, or the power change procedure; and

transmit at least one SRS in accordance with the SRS configuration information; and

a memory coupled with the at least one processor.

2. The apparatus of claim 1 , wherein the determined capability of the UE comprises a capability related to

a limitation related to the one or more switching procedures when performing the additional SRS transmissions.

3. The apparatus of claim 2 , wherein the time gap comprises a guard symbol between SRS transmissions when performing the one or more switching procedures.

4. The apparatus of claim 2 , wherein the limitation related to the one or more switching procedures comprises a limitation related to at least one of antenna switching or frequency hopping.

5. The apparatus of claim 1 , wherein the capability information indicates at least one SRS transmission pattern supported by the UE or not supported by the UE for at least one of the antenna switching procedure or the frequency hopping procedure.

6. The apparatus of claim 1 , wherein the SRS configuration information configures the UE with at least one SRS transmission pattern supported by the UE for at least one of the antenna switching procedure or the frequency hopping procedure, wherein the at least one SRS transmission pattern is based on the capability information.

7. The apparatus of claim 6 , wherein the at least one SRS transmission pattern configures the UE, when transmitting at least one SRS, with no additional time gap between SRS transmissions.

8. The apparatus of claim 6 , wherein the at least one SRS transmission pattern configures the UE, when transmitting at least one SRS, with at least a one-symbol gap between SRS transmissions.

9. The apparatus of claim 6 , wherein the at least one SRS transmission pattern is further based on at least one of a signal to noise ratio (SNR) condition, transmission power at the UE, or available resources at network.

10. The apparatus of claim 1 , wherein the capability information of the UE is determined on a per-band or per-group basis.

11. An apparatus for wireless communication by a base station (BS) in a network, comprising:

at least one processor configured to:

receive, from a user equipment (UE), capability information indicating a capability of the UE related to a time gap for one or more switching procedures associated with additional sounding reference signal (SRS) transmissions in a normal uplink (UL) subframe, including at least one of an antenna switching procedure, a frequency hopping procedure, or a power change procedure;

transmit SRS configuration information to the UE, wherein:

the SRS configuration information comprises an SRS transmission pattern supported by the UE, and

the SRS transmission pattern supported by the UE is based, at least in part, on the time gap for at least one of the antenna switching procedure, the frequency hopping procedure, or the power change procedure; and

receive at least one SRS transmitted in accordance with the SRS configuration information; and

a memory coupled with the at least one processor.

12. The apparatus of claim 11 , wherein the capability of the UE relates to

a limitation related to the one or more switching procedures when performing the additional SRS transmissions.

13. The apparatus of claim 12 , wherein the time gap comprises a guard symbol between SRS transmissions when performing the one or more switching procedures.

14. The apparatus of claim 12 , wherein the limitation related to the one or more switching procedures comprises a limitation related to at least one of antenna switching or frequency hopping.

15. The apparatus of claim 11 , wherein the capability information indicates at least one SRS transmission pattern supported by the UE or not supported by the UE for at least one of the antenna switching procedure or the frequency hopping procedure.

16. The apparatus of claim 11 , wherein the SRS configuration information configures the UE with at least one SRS transmission pattern supported by the UE for at least one of the antenna switching procedure or the frequency hopping procedure, wherein the at least one SRS transmission pattern is based on the capability information.

17. The apparatus of claim 16 , wherein the at least one SRS transmission pattern configures the UE, when transmitting at least one SRS, with no additional gap between SRS transmissions.

18. The apparatus of claim 16 , wherein the at least one SRS transmission pattern configures the UE, when transmitting at least one SRS, with at least one-symbol gap between SRS transmissions.

19. The apparatus of claim 16 , wherein the at least one SRS transmission pattern is further based on at least one of a signal to noise ratio (SNR) condition, transmission power at the UE, or available resources at network.

20. The apparatus of claim 11 , wherein the capability information of the UE is provided on a per-band or per-group basis.

21. A method for wireless communication by a user equipment (UE), comprising:

transmitting, to a base station (BS), capability information related to a time gap for one or more switching procedures associated with additional sounding reference signal (SRS) transmissions in a normal uplink (UL) subframe, including at least one of an antenna switching procedure, a frequency hopping procedure, or a power change procedure;

receiving SRS configuration information, wherein:

the SRS configuration information comprises an SRS transmission pattern supported by the UE, and

the SRS transmission pattern supported by the UE is based, at least in part, on the time gap for at least one of the antenna switching procedure, the frequency hopping procedure, or the power change procedure; and

transmitting at least one SRS in accordance with the SRS configuration information.

22. The method of claim 21 , wherein the determined capability of the UE comprises a capability related to

a limitation related to the switching procedures when performing the additional SRS transmissions.

23. A method for wireless communication by a base station (BS) in a network, comprising:

receiving, from a user equipment (UE), capability information indicating a capability of the UE related to a time gap for one or more switching procedures associated with additional sounding reference signal (SRS) transmissions in a normal uplink (UL) subframe, including at least one of an antenna switching procedure, a frequency hopping procedure, or a power change procedure;

transmitting SRS configuration information to the UE, wherein:

the SRS configuration information comprises an SRS transmission pattern supported by the UE, and

the SRS transmission pattern supported by the UE is based, at least in part, on a time gap for at least one of the antenna switching procedure, the frequency hopping procedure, or the power change procedure; and

receiving at least one SRS transmitted in accordance with the SRS configuration information.

24. The method of claim 23 , wherein the capability of the UE relates to

a limitation related to the one or more switching procedures when performing the additional SRS transmissions.