Power control method and device

Patent metadata

Field	Value
Publication number	US-12376046-B2
Application number	US-202217584720-A
Country	US
Kind code	B2
Filing date	Jan 26, 2022
Priority date	Aug 9, 2019
Publication date	Jul 29, 2025
Grant date	Jul 29, 2025

Abstract

The embodiments of the present disclosure provide a power control method and a device. The method includes: sending a target object by using a target transmit power, where the target object is an object over which power control has been performed, the target transmit power is determined according to a first power and a second power, the first power is a maximum transmit power of the UE, and the second power is a power corresponding to the target object; where the second power includes at least one of the following: a cellular link transmit power and a sidelink transmit power. This method is applied to scenarios in which the UE sends channels, signals, or information.

First claim

The invention claimed is:

1. A power control method, applied to user equipment (UE), wherein the method comprises:
sending a target object by using a target transmit power, wherein the target object is an object over which power control has been performed, the target transmit power is a smaller value of a first power and a second power, the first power is a maximum transmit power of the UE, and the second power comprises: a cellular link transmit power and a sidelink transmit power;
wherein the cellular link transmit power is a transmit power corresponding to the sidelink shared channel on a cellular link, and the sidelink transmit power is a transmit power corresponding to the sidelink shared channel on a sidelink;
wherein the target object is any one of the following: a sidelink shared channel and a sidelink control channel, a sidelink shared channel and a first object, and a sidelink shared channel, a sidelink control channel, and a first object, wherein the first object is a reference signal or sidelink feedback control information; and
the cellular link transmit power is further determined according to a cellular link path loss, a bandwidth of the sidelink control channel, and a power boosting amount of the sidelink control channel, and the sidelink transmit power is further determined according to a sidelink path loss, a bandwidth of the sidelink control channel, and a power boosting amount of the sidelink control channel.

2. The method according to claim 1 , wherein:
the cellular link transmit power is determined according to a first switch parameter, and the sidelink transmit power is determined according to a second switch parameter; or
the cellular link transmit power is determined according to a cellular link path loss, the sidelink transmit power is determined according to a sidelink path loss; the cellular link path loss is determined according to configuration information of a network device or is determined according to whether the UE is within the coverage of the network device; and the sidelink path loss is determined according to the configuration information of the network device or is determined according to a transmission mode of the target object.

3. The method according to claim 1 , wherein the target object is: a sidelink shared channel and a first object; and
the sending a target object by using a target transmit power comprises:
sending the sidelink shared channel on each time domain unit in a first time domain resource by using a third power, and sending the first object by using a fourth power, wherein the first time domain resource is a time domain resource multiplexed by the sidelink shared channel and the first object;
wherein a sum of the third power and the fourth power is the target transmit power.

4. The method according to claim 3 , wherein the third power and the fourth power are determined according to the sidelink shared channel; or
the third power and the fourth power are determined according to a target power offset, wherein the target power offset is a power offset between a resource element RE of the sidelink shared channel and an RE of the first object.

5. The method according to claim 1 , wherein the target object is any one of the following: a sidelink shared channel and a reference signal, and a sidelink shared channel, a sidelink control channel, and a reference signal; and
wherein the target transmit power is a smaller value of the first power and a candidate power, the candidate power is a sum of a fifth power and a reference signal transmit power, the fifth power is a smaller value of the second power and a sixth power, and the sixth power is determined according to the first power and the reference signal transmit power.

6. The method according to claim 5 , wherein the target object is: a sidelink shared channel and a reference signal, and the target transmit power is the candidate power; and
the sending a target object by using a target transmit power comprises:
sending the sidelink shared channel on each time domain unit in a second time domain resource by using the fifth power, and sending the reference signal by using the reference signal transmit power, wherein the second time domain resource is a time domain resource multiplexed by the sidelink shared channel and the reference signal.

7. The method according to claim 1 , wherein the target object is any one of the following: a sidelink shared channel and a sidelink control channel, and a sidelink shared channel, a sidelink control channel, and a first object, wherein the first object is a reference signal or sidelink feedback control information; and
the target transmit power is any one of the following: a sum of a seventh power and an eighth power, or a minimum value, a maximum value, or an average value of a ninth power, the seventh power, and the eighth power;
wherein the seventh power is a smaller value of the first power and the second power;
the eighth power is a smaller value of the first power and the second power, and the second power comprises at least one of the following: a cellular link transmit power and a sidelink transmit power; and
the ninth power is the first power or is determined according to the seventh power and the eighth power, wherein the ninth power is less than or equal to the first power.

8. The method according to claim 7 , wherein the target object is: a sidelink shared channel and a sidelink control channel; and when the sum of the seventh power and the eighth power is less than or equal to the first power, the target transmit power is the sum of the seventh power and the eighth power; and
the sending a target object by using a target transmit power comprises:
sending the sidelink shared channel on each time domain unit in a third time domain resource by using the seventh power, and sending the sidelink control channel by using the eighth power, wherein the third time domain resource is a time domain resource multiplexed by the sidelink shared channel and the sidelink control channel.

9. The method according to claim 7 , wherein the target object is: a sidelink shared channel and a sidelink control channel; and when the sum of the seventh power and the eighth power is greater than the first power, the target transmit power is the ninth power; and
the sending a target object by using a target transmit power comprises:
sending the sidelink shared channel on each time domain unit in a third time domain resource by using a ninth power, and sending the sidelink control channel by using a tenth power, wherein the third time domain resource is a time domain resource multiplexed by the sidelink shared channel and the sidelink control channel;
wherein the ninth power is a quotient of the seventh power and a proportional coefficient, the tenth power is a quotient of the eighth power and a proportional coefficient, and the proportional coefficient is a ratio of the sum of the seventh power and the eighth power to the first power; or
the ninth power is the seventh power, and the tenth power is a difference between the first power and the ninth power; or
the tenth power is the eighth power, and the ninth power is a difference between the first power and the tenth power.

10. The method according to claim 1 , wherein the sending a target object by using a target transmit power comprises:
sending the target object on each time domain unit in a target time domain resource by using the target transmit power.

11. User equipment (UE), comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements:
sending a target object by using a t

Assignees

• Vivo Mobile Communication Co Ltd

Inventors

• Jiang Wei
• Ji Zichao
• Wu Huaming
• Sun Xiaodong
• Liu Shixiao

Classifications

• H04W52/242

  taking into account path loss · CPC title

• H04W52/383

  power control in peer-to-peer links · CPC title

• H04W52/367 Primary

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

• H04W52/10 Primary

  Open loop power control · CPC title