Power control parameter configuration by base station

Patent metadata

Field	Value
Publication number	US-9907032-B2
Application number	US-201414901793-A
Country	US
Kind code	B2
Filing date	May 5, 2014
Priority date	May 5, 2014
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

A method includes: receiving, by a UE, a power control parameter set sent by a base station, where the power control parameter set includes at least one power control parameter group, where the power control parameter group includes at least one power control parameter; determining, by the UE, a first power control parameter group according to the power control parameter set; and determining, by the UE, a transmit power of the UE according to a power control parameter in the first power control parameter group. so that the UE obtains through calculation, according to the power control parameter in the first power control parameter group, the transmit power that satisfies a service currently initiated by the UE, and a communication range of the UE is ensured.

First claim

What is claimed is:

1. A power control method, comprising:
receiving, by a user equipment (UE), a power control parameter set configured by a base station and sent by the base station, wherein the power control parameter set comprises at least one power control parameter group comprising power control parameters P O , α, and Δ, P O is a target power for receiving a signal by the base station, α is a path loss compensation coefficient, and Δ is an offset parametric value for power control;
determining, by the UE, a first power control parameter group according to the power control parameter set; and
determining, by the UE, a device-to-device transmit power P D2D of the UE according to P D2D =P O +α·PL+Δ, where PL is a path loss from the base station to the UE.

2. The method according to claim 1 , wherein the at least one power control parameter group comprises:
at least one second power control parameter group; or
at least one third power control parameter group and at least one second power control parameter group; or
at least one third power control parameter group; and
wherein the second power control parameter group comprises at least one first power control parameter, and the third power control parameter group comprises a second power control parameter, wherein the second power control parameter is used to instruct the UE to transmit at a maximum transmit power allowed by the UE or used to instruct the UE to transmit at a power corresponding to the second power control parameter.

3. The method according to claim 1 , wherein:
the at least one power control parameter group comprises:
at least two second power control parameters, or
at least one third power control parameter group and at least one second power control parameter group, or
at least two third power control parameter groups;

receiving, by the UE, the power control parameter set sent by the base station comprises:
receiving, by the UE, the power control parameter set sent by the base station, wherein the power control parameter set comprises a first mapping relationship between a power control parameter group and a communication service; and

determining, by the UE, the first power control parameter group according to the power control parameter set comprises:
determining, by the UE, the first power control parameter group according to a communication service initiated by the UE and the first mapping relationship.

4. The method according to claim 1 , wherein:
the at least one power control parameter group comprises:
at least two second power control parameters, or
at least one third power control parameter group and at least one second power control parameter group, or
at least two third power control parameter groups;

receiving, by the UE, the power control parameter set sent by the base station comprises:
receiving, by the UE, the power control parameter set and a first identifier that are sent by the base station, wherein the power control parameter set comprises a second mapping relationship between a power control parameter group and a power control parameter group identifier; and

determining, by the UE, the first power control parameter group according to the power control parameter set comprises:
determining, by the UE, the first power control parameter group according to the first identifier and the second mapping relationship.

5. The method according to claim 1 , wherein:
the at least one power control parameter group comprises:
at least two second power control parameters, or
at least one third power control parameter group and at least one second power control parameter group, or
at least two third power control parameter groups;

receiving, by the UE, the power control parameter set sent by the base station comprises:
receiving, by the UE, the power control parameter set and a second identifier that are sent by the base station, wherein the power control parameter set comprises at least two power control parameter groups that are configured by the base station according to a preset sequence; and

determining, by the UE, the first power control parameter group according to the power control parameter set comprises:
determining, by the UE, the first power control parameter group according to the second identifier and the power control parameter set.

6. The method according to claim 1 , wherein:
the at least one power control parameter group comprises one the second power control parameter group and one the third power control parameter group;
receiving, by a UE, a power control parameter set sent by a base station comprises:
receiving, by the UE, the power control parameter set and a third identifier that are sent by the base station; and

determining, by the UE, a first power control parameter group according to the power control parameter set comprises:
determining, by the UE, the first power control parameter group according to the third identifier and the power control parameter set.

7. The method according to claim 1 , wherein:
the at least one power control parameter group comprises one second power control parameter group;
receiving, by the UE, the power control parameter set sent by the base station comprises:
receiving, by the UE, the power control parameter set and a fourth identifier that are sent by the base station; and

determining, by the UE, the first power control parameter group according to the power control parameter set comprises:
determining, by the UE according to the fourth identifier and the power control parameter set, that the first power control parameter group comprises a first power control parameter or a second power control parameter.

8. A power control method, comprising:
configuring, by a base station, a power control parameter set, wherein the power control parameter set comprises at least one power control parameter group comprising power control parameters P O , α, and Δ, P O is a target power for receiving a signal by the base station, α is a path loss compensation coefficient, and Δ is an offset parametric value for power control; and
sending, by the base station, the power control parameter set to a user equipment (UE), so that the UE determines a first power control parameter group according to the power control parameter set and determines a device-to-device transmit power P D2D of the UE according to P D2D =P O +α·PL+Δ, where PL is a path loss from the base station to the UE.

9. The method according to claim 8 , wherein the at least one power control parameter group comprises:
at least one second power control parameter group; or
at least one third power control parameter group and at least one second power control parameter group; or
at least one third power control parameter group; and
wherein the second power control parameter group comprises at least one first power control parameter, and the third power control parameter group comprises a second power control parameter, wherein the second power control parameter is used to instruct the UE to transmit at a maximum transmit power allowed by the UE or used to instruct the UE to transmit at a power corresponding to the second power control parameter.

10. The method according to claim 8 , wherein:
the at least one power control parameter group comprises:
at least two second power control parameters, or
at least one third power control parameter group and at least one second power control parameter group, or
at least two third power control parameter groups; and

sending, by the base station, the power control parameter set to a UE comprises:
sending, by the base station, the power control parameter set to the UE, wherein the power control parameter set comprises

Assignees

• Huawei Device Co Ltd
• Huawei Device Dongguan Co Ltd

Inventors

• Wang Jian

Classifications

• H04W52/367 Primary

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

• H04W52/34

  TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading · CPC title

• H04W52/10 Primary

  Open loop power control · CPC title

• H04W52/281

  taking into account user or data type priority · CPC title

• H04W52/383 Primary

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