Capability information for sounding reference signal improvements

Patent metadata

Field	Value
Publication number	US-11509372-B2
Application number	US-202016863732-A
Country	US
Kind code	B2
Filing date	Apr 30, 2020
Priority date	May 3, 2019
Publication date	Nov 22, 2022
Grant date	Nov 22, 2022

Abstract

Certain aspects of the present disclosure provide techniques for capability information for sounding reference signal (SRS) improvements. An exemplary method generally includes determining a capability of the UE related to additional sounding reference signal (SRS) transmissions in a normal uplink (UL) subframe; transmitting, to a base station (BS), capability information indicating the determined capability of the UE; receiving SRS configuration information, wherein the SRS configuration information is based, at least in part, on the capability information; and transmitting at least one SRS in accordance with the SRS configuration information.

First claim

What is claimed is:

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 th

Assignees

• Qualcomm Inc

Inventors

• Liu Le
• Rico Alvarino Alberto
• Akula Prashanth

Classifications

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04L27/26025

  Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking (allocating sub-channels of the transmission path H04L5/003) · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04L5/0012

  Hopping in multicarrier systems · CPC title

• H04W52/325

  Power control of control or pilot channels · CPC title