POWER CONTROL METHOD, APPARATUS AND SYSTEM

• US 20130111235A1
• Filed: 12/20/2012
• Published: 05/02/2013
• 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
• Granted Patent: US 8,694,047 B2
• Time in Patent Office: Days
• US Class Current: 713/310
• 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 if 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;

sending first data on an interfering frequency of the first-standard communication system by using a first power lower than transmit power P1, wherein the interfering frequency is a frequency that causes an interference to the second-standard communication system among frequencies used by the service; and

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

2. The method according claim 1, further comprising:

sending the first data on the interfering frequency by using a power of the threshold value P2 of the interference.

3. The method according claim 1, further comprising:

if the first power on the interfering frequency of the first-standard communication system is reduced to the P2 and the second power on the non-interfering frequency of the first-standard communication system is increased to a P_max, sending the first data by using a transmit power of the interfering frequency, wherein the transmit power of the interfering frequency is determined according to a relationship between a lost power on the interfering frequency and a compensated power on the non-interfering frequency, and the P_max is a maximum transmit power of a cell of the first-standard communication system where the service is ran.

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

determining 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, and the P_offset is an off set of the compensated power; and

sending the first data on the interfering frequency by using a power of the threshold value P2 of the interference.

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

sending the second data on the non-interfering frequency by using a transmit power of the non-interfering frequency, wherein the transmit power of the non-interfering frequency is determined according to the transmit power on the interfering frequency.

6. The method according to claim 5, further comprising:

sending the second 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, the n1 is a number of non-interfering frequencies, the n2 is a number of interfering frequencies, and the P_offset is the offset of the compensated power.

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

determining 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, and the P_offset is an offset of the compensated power;

sending the second data on the non-interfering frequency by using the power P_max; and

sending the first 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, the n1 is a number of non-interfering frequencies, and the n2 is a number of interfering frequencies.

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

determining that the transmit power P1 is lower than the threshold value P2 of the power interference of the first-standard communication system to the second-standard communication system; and

sending the first data on the interfering frequency and sending the second data on the non-interfering frequency by using the transmit power P1.

9. A power control apparatus, comprising:

a processor, configured to determine a transmit power P1 of a base station of a first-standard communication system if 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 first data on an interfering frequency of the first-standard communication system by using a first power lower than P1 if 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 second data on a non-interfering frequency by using a second power higher than the transmit power P1.

10. The apparatus according to claim 9, wherein the transmitter is specifically configured to use the power of the interference value P2 of interference to send the first data on the interfering frequency.

11. The apparatus according to claim 9, wherein the processor is specifically configured to, when the first power on the interfering frequency of the first-standard communication system is reduced to the P2 and the second power on the non-interfering frequency of the first-standard communication system is increased to a P_max, use a transmit power of the interfering frequency to send the first data, wherein the transmit power of the interfering frequency is determined according to a relationship between a lost power on the interfering frequency and a compensated power on the non-interfering frequency, and the P_max is a maximum transmit power of a cell of the first-standard communication system where the service is ran.

12. The apparatus according to claim 11, 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, and the P_offset is an offset of the compensated power; and

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

13. The apparatus according to claim 12, wherein the transmitter is specifically configured to use a transmit power of the non-interfering frequency to send the second data, wherein the transmit power of the non-interfering frequency is determined according to the transmit power on the interfering frequency.

14. The apparatus according to claim 13, wherein the transmitter is specifically configured to use a transmit power P3 of the non-interfering frequency to send the second 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, the n1 is a number of non-interfering frequencies, the n2 is a number of interfering frequencies, and the P_offset is the offset of the compensated power.

15. The apparatus according to claim 11, wherein the transmitter comprises:

a second 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, and the P_offset is an offset of the compensated power;

a second sending submodule, configured to use the power P_max to send the second 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 first 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, the n1 is a number of non-interfering frequencies, and the n2 is a number of interfering frequencies.

16. The apparatus according to claim 10,

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 third determination module 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.

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