SRS power control method and device

Patent metadata

Field	Value
Publication number	US-12127129-B2
Application number	US-202117515283-A
Country	US
Kind code	B2
Filing date	Oct 29, 2021
Priority date	Apr 30, 2019
Publication date	Oct 22, 2024
Grant date	Oct 22, 2024

Abstract

An SRS power control method includes: receiving a power control parameter, the power control parameter being used to determine a transmitting power of an additional SRS; and determining the transmission power and a power headroom of the additional SRS according to the power control parameter.

First claim

What is claimed is:

1. A sounding reference signal (SRS) power control method, performed by a terminal device and comprising:
receiving a power control parameter, wherein the power control parameter is used to determine a transmitting power of an additional SRS; and
determining the transmitting power of the additional SRS according to a received power control parameter; wherein
the received power control parameter and a power control parameter of a legacy SRS are independently configured.

2. The method according to claim 1 , wherein the received power control parameter comprises a first power control parameter and a second power control parameter;
the first power control parameter is configured by a radio resource control (RRC) signaling, and the second power control parameter is indicated by downlink control information (DCI).

3. The method according to claim 2 , wherein the second power control parameter comprises a transmission power control (TPC) command, and the TPC command is used to indicate:
a closed loop power control adjustment quantity of the additional SRS; and/or
a closed loop power control adjustment quantity of the legacy SRS.

4. The method according to claim 2 , wherein the second power control parameter comprises a closed loop power control adjustment state indication and a transmission power control (TPC) command,
the closed loop power control adjustment state indication being configured to indicate the TPC command to be applied to:
closed loop power control adjustment of the additional SRS, or
closed loop power control adjustment of the legacy SRS.

5. The method according to claim 2 , wherein the received additional SRS and the legacy SRS are transmitted in one TTI; and
the received power control parameter and the power control parameter of the legacy SRS are independently indicated.

6. The method according to claim 1 , wherein the additional SRS and the legacy SRS are transmitted in one transmission time interval (TTI); and
the received power control parameter and the power control parameter of the legacy SRS are independently indicated.

7. The method according to claim 1 , wherein if the additional SRS and the legacy SRS are transmitted in one TTI and the terminal device needs to calculate or report a power margin within the TTI, the method further comprises: calculating the power margin based on one of:
a maximum of the transmitting power of the additional SRS and the transmitting power of the legacy SRS;
the transmitting power of the additional SRS; or
the transmitting power of the legacy SRS.

8. The method according to claim 1 , wherein the received power control parameter comprises a first power control parameter, the first power control parameter configured through an RRC signaling comprises at least one of:
a target receiving power of the additional SRS;
a pathloss calculation compensation factor of the additional SRS;
a pathloss calculation reference signal of the additional SRS; or
a closed loop power control process identification of the additional SRS.

9. A sounding reference signal (SRS) power control method, performed by a network device and comprising:
transmitting a power control parameter, wherein a transmitted power control parameter is used for a terminal device to determine a transmitting power of an additional SRS; wherein
the transmitted power control parameter and a power control parameter of a legacy SRS are independently configured.

10. The method according to claim 9 , wherein the transmitted power control parameter comprises a first control parameter and a second power control parameter; and the transmitting the power control parameter comprises:
transmitting a radio resource control (RRC) signaling; and
transmitting downlink control information (DCI); wherein
the first power control parameter is configured by the RRC signaling, and the second power control parameter is indicated by the DCI.

11. The method according to claim 10 , wherein the additional SRS and the legacy SRS are transmitted in one TTI; and
the transmitted power control parameter and the power control parameter of the legacy SRS are independently indicated.

12. The method according to claim 9 , wherein the additional SRS and the legacy SRS are transmitted in one transmission time interval (TTI); and
the transmitted power control parameter and the power control parameter of the legacy SRS are independently indicated.

13. A terminal device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, causes the terminal device to perform:
receiving a power control parameter, wherein the power control parameter is used to determine a transmitting power of an additional sounding reference signal (SRS); and
determining the transmitting power of the additional SRS according to a received power control parameter; wherein
the received power control parameter and a power control parameter of a legacy SRS are independently configured.

14. The terminal device according to claim 13 , wherein the received power control parameter comprises a first power control parameter and a second power control parameter;
the first power control parameter is configured by a radio resource control (RRC) signaling, and the second power control parameter is indicated by downlink control information (DCI).

15. The terminal device according to claim 14 , wherein the second power control parameter comprises a transmission power control (TPC) command, and the TPC command is used to indicate:
a closed loop power control adjustment quantity of the additional SRS; and/or
a closed loop power control adjustment quantity of the legacy SRS.

16. The terminal device according to claim 14 , wherein the second power control parameter comprises a closed loop power control adjustment state indication and a transmission power control (TPC) command,
the closed loop power control adjustment state indication being configured to indicate the TPC command to be applied to:
closed loop power control adjustment of the additional SRS, or
closed loop power control adjustment of the legacy SRS.

17. The terminal device according to claim 14 , wherein the additional SRS and the legacy SRS are transmitted in one TTI; and
the received power control parameter and the power control parameter of the legacy SRS are independently indicated.

18. The terminal device according to claim 13 , wherein the additional SRS and the legacy SRS are transmitted in one transmission time interval (TTI); and
the received power control parameter and the power control parameter of the legacy SRS are independently indicated.

19. The terminal device according to claim 13 , wherein if the additional SRS and the legacy SRS are transmitted in one TTI and the terminal device needs to calculate or report a power margin within the TTI, the computer program, when executed by the processor, causes the terminal device to further perform: calculating the power margin based on one of:
a maximum of the transmitting power of the additional SRS and the transmitting power of the legacy SRS;
the transmitting power of the additional SRS; or
the transmitting power of the legacy SRS.

20. The terminal device according to claim 13 , wherein the received power control parameter comprises a first power control parameter, the first power control parameter configured through an RRS signaling comprises at least one of:
a target receiving po

Assignees

• Vivo Mobile Communication Co Ltd

Inventors

• Sun Xiaodong

Classifications

• H04W52/367

  Power values between minimum and maximum limits, e.g. dynamic range · CPC title

• H04W52/325 Primary

  Power control of control or pilot channels · CPC title

• H04W52/242

  taking into account path loss · CPC title

• H04W52/08 Primary

  Closed loop power control · CPC title

• H04W52/146

  Uplink power control · CPC title