Power control method, apparatus and system

• US 8,694,047 B2
• Filed: 12/20/2012
• Issued: 04/08/2014
• Est. Priority Date: 05/27/2011
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Yang, Kai, Peng, Xiang, Li, Zhen
• Primary Examiner(s): Nguyen, Hai V
• Application Number:
  US13/723,052
• Publication Number:
  US 20130111235A1
• Time in Patent Office: 474 Days
• Field of Search: 455/522
• US Class Current: 455/522
• CPC Class Codes: G06F 1/266 Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
• CPC Class Codes: H04L 1/0001 Systems modifying transmission characteristics according to link quality, e.g. power backoff adaptive data allocation for multicarrier modulation H04L5/0044; controlling transmission power for radio systems H04W52/04
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 52/365 Power headroom reporting
• CPC Class Codes: H04W 52/40 during macro-diversity or soft handoff
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

The present invention discloses a power control method, apparatus, and system. The power control method of the present invention includes: when a service runs in a first-standard communication system, determining a transmit power P1 of the first-standard communication system; determining that the transmit power P1 is higher than or equal to a threshold value P2 of power interference of the first-standard communication system to a second-standard communication system; use a power lower than P1 to send data on an interference frequency of the first-standard communication system. According to the power control method in the present invention, a signal transmit power of the interfering frequency of the first-standard communication system can be reduced when it is determined that the first-standard communication system will cause interference to the second-standard communication system, thereby reducing the interference of the first-standard communication system to the second-standard communication system.

Claims

1. A power control method, comprising:

determining a transmit power P1 of a base station of a first-standard communication system when a service runs in the first-standard communication system;

determining that the transmit power P1 is higher than or equal to a threshold value P2 of a power interference of the first-standard communication system to a second-standard communication system, wherein the first-standard communication system is different from the second-standard communication system;

when (P_max−

P1)×

n1>

(P1−

P2)×

n2+P_offset is determined, wherein the n1 is a number of non-interfering frequencies, the n2 is a number of interfering frequencies, the P_offset is an offset of the compensated power, the P_max is a maximum transmit power of a cell of the first-standard communication system where the service is ran, sending data on an interfering frequency of the first-standard communication system by using a power lower than transmit power P1 , wherein the interfering frequency is a frequency that causes an interference to the second-standard communication system among hopping frequencies used by the service, comprising;

sending the data on the interfering frequency by using a power of the threshold value P2 of the interference; and

sending data on a non-interfering frequency of the first-standard communication by using a power higher than the transmit power P1;

wherein the power for sending data on the interfering frequency is determined according to a relationship between a lost power on the interfering frequency when the power for sending data on the interfering frequency is reduced to the P2 and a compensated power on the non-interfering frequency when the power for sending data on the non-interfering frequency is increased to the P_max.

2. The method according to claim 1, wherein sending data on the non-interfering frequency of the first-standard communication by using the power higher than the transmit power P1 comprises:

sending the data on the non-interfering frequency by using a transmit power P3 of the non-interfering frequency, wherein the transmit power P3 is determined according to a following formula;

P3=P1+[(P1−

P2)×

n2+P_offset]/n1.

3. The method according to claim 1, further comprising:

when (P_max−

P1)×

n1<

(P1−

P2)×

n2+P_offset is determined,

sending the data on the interfering frequency by using a transmit power P4, wherein the transmit power P4 is determined according to a following formula;

P4=P1−

[(P_max−

P1)×

n1+P_offset]/n2.

4. The method according to claim 1, further comprising:

when the transmit power P1 is determined lower than the threshold value P2 of the power interference of the first-standard communication system to the second-standard communication system, sending the data on the interfering frequency and sending the data on the non-interfering frequency by using the transmit power P1.

5. A power control apparatus, comprising:

a processor, configured to determine a transmit power P1 of a base station of a first-standard communication system when a service runs in the first-standard communication system; and

determine whether the transmit power P1 is higher than or equal to a threshold value P2 of a power interference of the first-standard communication system to a second-standard communication system;

a transmitter, configured to send data on an interfering frequency of the first-standard communication system by using a power lower than P1 when the transmit power P1 is higher than or equal to a threshold value P2 of a power interference of the first-standard communication system to a second-standard communication system, wherein the interfering frequency is a frequency that causes an interference to the second-standard communication system among frequencies used by the service; and

send a data on a non-interfering frequency by using a power higher than the transmit power P1;

wherein the transmitter comprises;

a first determination submodule, configured to determine that (P_max−

P1)×

n1>

(P1−

P2)×

n2+P_offset, wherein the n1 is a number of non-interfering frequencies, the n2 is a number of interfering frequencies, the P_offset is an offset of the compensated power, and the P_maxis a maximum transmit power of a cell of the first-standard communication system where the service is ran; and

a first sending submodule, configured to use the power of the threshold value P2 of interference to send the data on the interfering frequency;

wherein the transmitter is further configured to determine the power for sending data on the interfering frequency according to a relationship between a lost power on the interfering frequency when the power for sending data on the interfering frequency is reduced to the P2 and a compensated power on the non-interfering frequency when the power for sending data on the non-interfering frequency is increased to the P_max.

6. The apparatus according to claim 5, wherein the transmitter is specifically configured to use a transmit power P3 of the non-interfering frequency to send the data, wherein the transmit power P3 is determined according to a following formula:

P3=P1+[(P1−

P2)×

n2+P_offset]/n1, P3 is the determined transmit power of the non-interfering frequency.

7. The apparatus according to claim 5, wherein the transmitter further comprises:

a second determination submodule, configured to determine that (P_max−

P1)×

n1<

(P1−

P2)×

n2+P_offset;

a second sending submodule, configured to use the power P_max to send the data on the non-interfering frequency; and

a third sending submodule, configured to use a transmit power P4 of the interfering frequency to send the data, wherein the transmit power P4 is determined according to the following formula;

P4=P1−

[(P_max−

P1)×

n1+P_offset]/n2, P4 is the determined transmit power of the interfering frequency.

8. The apparatus according to claim 5, wherein:

the processor is further configured to determine whether the transmit power P1 is lower than the threshold value P2 of interference of the first-standard communication system to the second-standard communication system; and

the transmitter is further configured to use the power P1 to send data on the interfering frequency and the non-interfering frequency when the processor determines that the transmit power P1 is lower than the threshold value P2 of interference of the first-standard communication system to the second-standard communication system.

9. A system, comprising the apparatus according to claim 5.