Method for indicating transmit power, method for determining transmit power, terminal, device, and medium

Patent metadata

Field	Value
Publication number	US-12507181-B2
Application number	US-202018003070-A
Country	US
Kind code	B2
Filing date	Aug 21, 2020
Priority date	Aug 21, 2020
Publication date	Dec 23, 2025
Grant date	Dec 23, 2025

Abstract

A method for indicating a transmit power is performed by a terminal, and includes: determining a maximum permissible transmit power of at least one uplink beam of the terminal, wherein the maximum permissible transmit power is a maximum transmit power subject to satisfying a maximum permissible exposure (MPE) limit of the terminal; and transmitting first indication information for indicating the maximum permissible transmit power of the at least one uplink beam.

First claim

The invention claimed is:

1 . A method for indicating a transmit power, performed by a terminal, the method comprising:
determining a maximum permissible transmit power of at least one uplink beam of the terminal, wherein the maximum permissible transmit power is a maximum transmit power subject to satisfying a maximum permissible exposure (MPE) limit of the terminal; and transmitting first indication information for indicating the maximum permissible transmit power of the at least one uplink beam, wherein the first indication information comprises an identifier of the uplink beam and power-related information of the uplink beam, and the power-related information comprises a difference between the maximum permissible transmit power and a maximum transmit power of the terminal.

2 . The method of claim 1 , wherein transmitting the first indication information for indicating the maximum permissible transmit power of the at least one uplink beam comprises at least one of:
transmitting the first indication information through an uplink power headroom report (PHR); or transmitting the first indication information through an uplink power limit report, wherein the uplink power limit report is configured to indicate a power limit due to the MPE limit.

3 . The method of claim 1 , wherein transmitting the first indication information for indicating the maximum permissible transmit power of the at least one uplink beam comprises:
transmitting the first indication information through a physical uplink shared channel (PUSCH).

4 . The method of claim 1 , wherein transmitting the first indication information for indicating the maximum permissible transmit power of the at least one uplink beam comprises:
transmitting the first indication information for indicating a maximum permissible transmit power of a first uplink beam, wherein the first uplink beam is one of: an uplink beam with the maximum permissible transmit power less than a maximum transmit power of the terminal, any uplink beam, or an uplink beam with the maximum permissible transmit power not greater than the maximum transmit power of the terminal; wherein the maximum transmit power of the terminal is one of a maximum transmit power corresponding to the first uplink beam and configured by a network device, or the maximum transmit power corresponding to the first uplink beam and supported by a capability of the terminal.

5 . The method of claim 1 , wherein the power-related information further comprises one or more of: the maximum permissible transmit power, a power interval to which the maximum permissible transmit power belongs, or a level corresponding to the maximum permissible transmit power,
wherein the maximum transmit power of the terminal is one of a maximum transmit power corresponding to the uplink beam and configured by a network device, or the maximum transmit power corresponding to the uplink beam and supported by a capability of the terminal.

6 . The method of claim 5 , wherein the identifier of the uplink beam comprises a reference signal identifier, and the reference signal identifier comprises at least one of: a synchronization signal block (SSB) ID, or a channel state information reference signal (CSI-RS) ID.

7 . The method of claim 1 , wherein determining the maximum permissible transmit power of the at least one uplink beam of the terminal comprises:
obtaining second indication information for indicating a maximum MPE value of the terminal; and determining the maximum permissible transmit power of the at least one uplink beam of the terminal based on the MPE value.

8 . The method of claim 7 , wherein obtaining the second indication information for indicating the maximum MPE value of the terminal comprises:
receiving the second indication information transmitted by a network device.

9 . A computer-readable storage medium having stored therein instructions that, when executed by a processor, cause the processor to perform the method of claim 1 .

10 . A method for determining a transmit power, performed by a network device, the method comprising:
receiving first indication information for indicating a maximum permissible transmit power of at least one uplink beam of a terminal, wherein the maximum permissible transmit power is a maximum transmit power subject to satisfying a maximum permissible exposure (MPE) limit of the terminal; and determining the maximum permissible transmit power of the uplink beam based on the first indication information, wherein the first indication information comprises an identifier of the uplink beam and power-related information of the uplink beam, and the power-related information comprises a difference between the maximum permissible transmit power and a maximum transmit power of the terminal.

11 . The method of claim 10 , wherein the power-related information further comprises one or more of: the maximum permissible transmit power, a power interval to which the maximum permissible transmit power belongs, a level corresponding to the maximum permissible transmit power,
wherein the maximum transmit power of the terminal is one of a maximum transmit power corresponding to the uplink beam and configured by a network device, or the maximum transmit power corresponding to the uplink beam and supported by a capability of the terminal.

12 . A terminal, comprising:
a processor; and a memory for storing instructions executable by the processor; wherein the processor is configured to: determine a maximum permissible transmit power of at least one uplink beam of the terminal, wherein the maximum permissible transmit power is a maximum transmit power subject to satisfying a maximum permissible exposure (MPE) limit of the terminal; and transmit first indication information for indicating the maximum permissible transmit power of the at least one uplink beam, wherein the first indication information comprises an identifier of the uplink beam and power-related information of the uplink beam, and the power-related information comprises a difference between the maximum permissible transmit power and a maximum transmit power of the terminal.

13 . The terminal of claim 12 , wherein the processor is further configured to perform at least one of:
transmitting the first indication information through an uplink power headroom report (PHR); or transmitting the first indication information through an uplink power limit report, wherein the uplink power limit report is configured to indicate a power limit due to the MPE limit.

14 . The terminal of claim 12 , wherein the processor is further configured to:
transmit the first indication information through a physical uplink shared channel (PUSCH).

Assignees

• Beijing Xiaomi Mobile Software Co Ltd

Inventors

• Li Mingju

Classifications

• H04W74/0833

  Random access procedures, e.g. with 4-step access · CPC title

• H04W74/0836

  with 2-step access · CPC title

• H04W52/146 Primary

  Uplink power control · CPC title

• H04W72/21

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

• H04W52/365 Primary

  Power headroom reporting · CPC title