Method for controlling transmit power of wireless communications terminal, and wireless communications terminal

Patent metadata

Field	Value
Publication number	US-10820280-B2
Application number	US-201515764747-A
Country	US
Kind code	B2
Filing date	Sep 29, 2015
Priority date	Sep 29, 2015
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

A method for controlling a transmit power of a terminal, and a terminal, where the method and the terminal include, working states of a first antenna and a second antenna may be monitored, and then a transmit power of the first antenna or that of the second antenna may be controlled according to a preset correspondence. Therefore, according to the method and the terminal, a transmit power of an antenna in a working state in the first antenna and the second antenna may be accurately controlled. If the transmit power is less than a standard transmit power, a Specific Absorption Rate (SAR) can be reduced.

First claim

What is claimed is:

1. A method for controlling a transmit power of a wireless communications terminal, wherein the wireless communications terminal comprises a first controller, a second controller, a WI-FI controller, a first antenna, a second antenna, and a WI-FI antenna, and wherein the method comprises:
determining, by the first controller, that the first antenna is in a working state;
determining, by the first controller, that the wireless communications terminal is set as a WI-FI access hotspot;
obtaining, by the first controller, a transmit power of the first antenna and a first transmit power of the WI-FI antenna according to preset correspondences;
sending, by the first controller, the transmit power of the first antenna to the second controller;
sending, by the first controller, the first transmit power of the WI-FI antenna to the WI-FI controller;
controlling, by the second controller, the first antenna to perform transmission according to the transmit power of the first antenna; and
controlling, by the WI-FI controller, the WI-FI antenna to perform transmission according to the first transmit power of the WI-FI antenna,
wherein the first transmit power of the WI-FI antenna is less than a standard WI-FI transmit power corresponding to the WI-FI antenna, and the transmit power of the first antenna is less than a standard antenna transmit power corresponding to the first antenna.

2. The method according to claim 1 , further comprising:
determining, by the first controller, that the second antenna is switched to the working state;
obtaining, by the first controller, a transmit power of the second antenna and a second transmit power of the WI-FI antenna according to the preset correspondences;
sending, by the first controller, the transmit power of the second antenna to the second controller;
sending, by the first controller, the second transmit power of the WI-FI antenna to the WI-FI controller;
controlling, by the second controller, the second antenna to perform transmission according to the transmit power of the second antenna; and
controlling, by the WI-FI controller, the WI-FI antenna to perform transmission according to the second transmit power of the WI-FI antenna.

3. The method according to claim 1 , wherein determining that the first antenna is in the working state comprises:
determining, by the first controller, that the wireless communications terminal performs voice communication using the first antenna; and
determining, by the first controller, a voice communication type of the first antenna, wherein obtaining the transmit power of the first antenna and the first transmit power of the WI-FI antenna comprises determining, by the first controller, the transmit power of the first antenna and the first transmit power of the WI-FI antenna according to preset first correspondence and preset second correspondence, wherein the preset first correspondence determines, based on the voice communication type of the first antenna and when the wireless communications terminal is set as the WI-FI access hotspot, the transmit power of the first antenna, and wherein the preset second correspondence determines, based on the voice communication type of the first antenna and when the wireless communications terminal is set as the WI-FI access hotspot, the first transmit power of the WI-FI antenna.

4. The method according to claim 2 , wherein determining that the second antenna is switched to the working state comprises:
determining, by the first controller, that the wireless communications terminal switches from the first antenna to the second antenna to perform voice communication; and
determining, by the first controller, a voice communication type of the second antenna, wherein obtaining the transmit power of the second antenna and the second transmit power of the WI-FI antenna comprises determining, by the first controller, the transmit power of the second antenna and the second transmit power of the WI-FI antenna according to preset third correspondence and preset fourth correspondence, wherein the preset third correspondence determines, based on the voice communication type of the second antenna and when the wireless communications terminal is set as the WI-FI access hotspot, the transmit power of the second antenna, and wherein the preset fourth correspondence determines, based on the voice communication type of the second antenna and when the wireless communications terminal is set as the WI-FI access hotspot, the second transmit power of the WI-FI antenna.

5. The method according to claim 1 , wherein determining that the first antenna is in the working state comprises determining, by the first controller, that the wireless communications terminal performs data transmission using the first antenna, wherein obtaining the transmit power of the first antenna and the first transmit power of the WI-FI antenna comprises determining, by the first controller, the transmit power of the first antenna and the first transmit power of the WI-FI antenna according to preset fifth correspondence and preset sixth correspondence, wherein the preset fifth correspondence determines, when the first antenna performs the data transmission and when the wireless communications terminal is set as the WI-FI access hotspot, the transmit power of the first antenna, and wherein the preset sixth correspondence determines, when the first antenna performs the data transmission and when the wireless communications terminal is set as the WI-FI access hotspot, the first transmit power of the WI-FI antenna.

6. The method according to claim 2 , wherein determining that the second antenna is switched to the working state comprises determining, by the first controller, that the wireless communications terminal switches from the first antenna to the second antenna to perform data transmission, wherein obtaining the transmit power of the second antenna and the second transmit power of the WI-FI antenna comprises determining, by the first controller, the transmit power of the second antenna and the second transmit power of the WI-FI antenna according to preset seventh correspondence and preset eighth correspondence, wherein the preset seventh correspondence determines, when the second antenna performs the data transmission and when the wireless communications terminal is set as the WI-FI access hotspot, the transmit power of the second antenna, and wherein the preset eighth correspondence determines, when the second antenna performs the data transmission and when the wireless communications terminal is set as the WI-FI access hotspot, the second transmit power of the WI-FI antenna.

7. The method according to claim 1 , wherein determining that the first antenna is in the working state comprises:
determining, by the first controller, that the wireless communications terminal performs voice communication using the first antenna; and
determining, by the first controller, a voice communication type of the first antenna, wherein the wireless communications terminal further comprises an optical proximity sensor, wherein the method further comprises determining, by the first controller, that the optical proximity sensor is triggered, wherein obtaining the transmit power of the first antenna and the first transmit power of the WI-FI antenna comprises determining, by the first controller, the transmit power of the first antenna and the first transmit power of the WI-FI antenna according to preset ninth correspondence and preset tenth correspondence, wherein the preset ninth correspondence determines the transmit power of the first antenna based on the voice communication type of the first antenna, that the wireless communications terminal is set as the WI-FI access hotspot, and that the optical proximity sensor

Assignees

• Huawei Tech Co Ltd

Inventors

• Luo Jian
• Jin Hui
• Yao Songping
• Li Hongyu
• Li Yingwei
• Zhang Hongming
• Du Xuyang

Classifications

• H04B7/0602

  using antenna switching (H04B7/0686 takes precedence; antenna beam directivity switching H01Q3/24) · CPC title

• H04B7/06 Primary

  at the transmitting station · CPC title

• H04W52/367 Primary

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

• H04W52/346

  distributing total power among users or channels · CPC title

• H04W52/288

  taking into account the usage mode, e.g. hands-free, data transmission or telephone · CPC title