Methods and apparatuses for controlling transmission power, and storage medium

Patent metadata

Field	Value
Publication number	US-12439345-B2
Application number	US-202217894632-A
Country	US
Kind code	B2
Filing date	Aug 24, 2022
Priority date	May 26, 2022
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

A method and an apparatus for controlling a transmission power, and a storage medium. The method includes: determining a target number of transmission cycles according to a service scenario of an electronic device, wherein a preset time window is divided into the target number of transmission cycles, and the preset time window is a test cycle used in a specific absorption rate (SAR) test of the electronic device; determining at least one of an upper limit value or a lower limit value of a transmission power corresponding to each transmission cycle, wherein an average value of transmission powers in the preset time window complies a SAR requirement; and controlling the electronic device to transmit and receive signals using a corresponding transmission power in each transmission cycle.

First claim

The invention claimed is:

1. A method for controlling a transmission power, comprising:
determining a target number of transmission cycles according to a service scenario of an electronic device, wherein a preset time window is divided into the target number of transmission cycles, and the preset time window is a test cycle used in a specific absorption rate (SAR) test of the electronic device;
determining at least one of an upper limit value or a lower limit value of a transmission power corresponding to each transmission cycle, wherein an average value of transmission powers in the preset time window complies a SAR requirement; and
controlling the electronic device to transmit and receive signals using a corresponding transmission power in each transmission cycle;
wherein determining the upper limit value of the transmission power corresponding to each transmission cycle comprises:
determining an upper limit adjustment value of the transmission power corresponding to each transmission cycle according to the service scenario;
determining the upper limit value of the transmission power corresponding to each transmission cycle by obtaining a sum of a limited power under the SAR requirement and the upper limit adjustment value.

2. The method according to claim 1 , wherein determining the target number of transmission cycles according to the service scenario of the electronic device comprises:
in a first service scenario, determining that the target number of the transmission cycles is a first number, wherein, in the first service scenario, each service of the electronic device is of a non-continuous type or a non-real-time type;
or,
in a second service scenario, determining that the target number of the transmission cycles is a second number, wherein, in the second service scenario, each service of the electronic device is of a continuous and real-time type;
or,
in a third service scenario, determining that the target number of the transmission cycles is a third number, wherein in the third service scenario, each service of the electronic device is of the continuous and real-time type, or the non-continuous type, or the non-real-time type;
wherein the first number is less than the third number, and the third number is less than the second number.

3. The method according to claim 1 , wherein determining the upper limit adjustment value of the transmission power corresponding to each transmission cycle comprises:
the greater a number of continuous and real-time services comprised in the service scenario, the smaller the upper limit adjustment value of the transmission power; or
the greater a number of non-continuous services and non-real-time services comprised in the service scenario, the greater the upper limit adjustment value of the transmission power.

4. The method according to claim 1 , further comprising:
determining the upper limit value of the transmission power corresponding to each transmission cycle according to a mapping relationship between a signal strength of the electronic device and an adjustment value.

5. The method according to claim 4 , wherein determining the upper limit value of the transmission power corresponding to each transmission cycle according to the mapping relationship between the signal strength of the electronic device and the adjustment value comprises:
in response to the signal strength being within a first range, determining the adjustment value corresponding to the signal strength as a first adjustment value;
in response to the signal strength being within a second range, determining the adjustment value corresponding to the signal strength as a second adjustment value;
in response to the signal strength being within a third range, determining the adjustment value corresponding to the signal strength as a third adjustment value;
determining a sum of the limited power under the SAR requirement and the adjustment value corresponding to the signal strength as the upper limit value of the transmission power corresponding to each transmission cycle;
wherein, the first range, the second range and the third range form a value range of the signal strength, a lower limit of the first range is greater than an upper limit of the second range, and a lower limit of the second range is greater than an upper limit of the third range; the first adjustment value is greater than the second adjustment value, and the second adjustment value is greater than the third adjustment value.

6. The method according to claim 1 , wherein the upper limit values corresponding to all transmission cycles in the preset time window are same, or at least one upper limit value corresponding to at least one transmission cycle in the preset time window is different from the upper limit values corresponding to other transmission cycles.

7. The method according to claim 1 , wherein determining the lower limit value of the transmission power corresponding to each transmission cycle comprises:
determining a lower limit adjustment value of the transmission power corresponding to each transmission cycle according to the service scenario;
determining the lower limit value of the transmission power corresponding to each transmission cycle by obtaining a difference between a limited power under the SAR requirement and the lower limit adjustment value.

8. The method according to claim 7 , wherein determining the lower limit adjustment value of the transmission power according to the service scenario comprises:
the greater a number of continuous and real-time services comprised in the service scenario, the smaller the lower limit adjustment value of the transmission power; or
the greater a number of non-continuous services and non-real-time services comprised in the service scenario, the greater the lower limit adjustment value of the transmission power.

9. The method according to claim 1 , wherein determining the target number of transmission cycles according to the service scenario of the electronic device comprises:
the greater a number of continuous and real-time services comprised in the service scenario, the greater a value of the target number; or
the greater a number of non-continuous services and non-real-time services comprised in the service scenario, the smaller the value of the target number.

10. An apparatus for controlling a transmission power, comprising:
a processor;
a memory configured to store c executable by the processor;
wherein when the computer program is executed by the processor, the processor is configured to:
determine a target number of transmission cycles according to a service scenario of an electronic device, wherein a preset time window is divided into the target number of transmission cycles, and the preset time window is a test cycle used in a specific absorption rate (SAR) test of the electronic device;
determine at least one of an upper limit value or a lower limit value of a transmission power corresponding to each transmission cycle, wherein an average value of transmission powers in the preset time window complies a SAR requirement;
control the electronic device to transmit and receive signals using a corresponding transmission power in each transmission cycle;
wherein the processor is configured to:
determine an upper limit adjustment value of the transmission power corresponding to each transmission cycle according to the service scenario;
determine the upper limit value of the transmission power corresponding to each transmission cycle by obtaining a sum of a limited power under the SAR requirement and the upper limit adjustment value.

11. The apparatus according to claim 10 , wherein the processor is configured to:
in a fir

Assignees

• Beijing Xiaomi Mobile Software Co Ltd

Inventors

• Zhang Hua
• Wang Deqian
• Zhang Jie
• Wu Chao
• Liu Shui
• Liu Xin

Classifications

• H04W52/367 Primary

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

• H04W52/24

  using SIR [Signal to Interference Ratio] or other wireless path parameters · CPC title

• H04B1/3838

  Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use · CPC title

• H04W52/28

  using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission · CPC title

• H04W52/225 Primary

  Calculation of statistics, e.g. average or variance · CPC title