System and Method for Implementing Power Distribution

• US 20110223961A1
• Filed: 11/30/2010
• Published: 09/15/2011
• Est. Priority Date: 03/10/2010
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Naito, Takao, Chen, Wei-Peng, Zhu, Chenxi
• Granted Patent: US 9,178,575 B2
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04B 7/022 Site diversity; Macro-diversity using two or more spaced independent antennas H04B7/04
• CPC Class Codes: H04B 7/0615 of weighted versions of same signal
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/15535 Control of relay amplifier gain amplifier gain control in general H03G3/00; gain control reducing self - or loop interference H04B7/15578
• CPC Class Codes: H04W 52/143 Downlink power control
• CPC Class Codes: H04W 52/20 using error rate
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters
• CPC Class Codes: H04W 52/241 taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
• CPC Class Codes: H04W 52/267 taking into account the information rate
• CPC Class Codes: H04W 52/386 centralized, e.g. when the radio network controller or equivalent takes part in the power control
• 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 88/085 Access point devices with remote components
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

In accordance with particular embodiments, a method for adjusting power distribution includes establishing a connection between a base station and a plurality of remote transceivers. The method also includes establishing a plurality of wireless connections with a plurality of endpoints via one or more of the plurality of remote transceivers. The method further includes determining a plurality of signal quality indications. Each signal quality indication is associated with a different one of a plurality of unique endpoint-remote transceiver pairs. The method additionally includes determining a power distribution for the plurality of remote transceivers based on the plurality of signal quality indications and an optimization equation. The optimization equation is configured to optimize a data throughput associated with the plurality of wireless connections by determining a power gain for each of the wireless connections.

Claims

1. A method for adjusting power distribution comprising:

establishing a connection between a base station and a plurality of remote transceivers;

establishing a plurality of wireless connections with a plurality of endpoints via one or more of the plurality of remote transceivers;

determining a plurality of signal quality indications, each signal quality indication associated with a different one of a plurality of unique endpoint-remote transceiver pairs; and

determining a power distribution for the plurality of remote transceivers based on the plurality of signal quality indications and an optimization equation configured to optimize a data throughput associated with the plurality of wireless connections by determining a power gain for each of the wireless connections.

2. The method of claim 1, wherein determining the power distribution is further based on a transmission power associated with each of the plurality of remote transceivers.

3. The method of claim 1, wherein:

establishing a plurality of wireless connections with a plurality of endpoints comprises assigning one or more subcarriers to each of the plurality of endpoints; and

determining the power distribution for the plurality of remote transceivers comprises determining a power gain for each of the subcarriers as transmitted by each of the remote transceivers.

4. The method of claim 3, further comprising assigning an approximately equal amount of power to each of the subcarriers assigned to a first endpoint with respect to a first remote transceiver.

5. The method of claim 1:

further comprising determining an inter-cell interference; and

wherein determining the power distribution is further based on the determined inter-cell interference.

6. The method of claim 1, wherein determining a plurality of signal quality indications comprises:

receiving an uplink power associated with each of the plurality of unique endpoint-remote transceiver pairs, the uplink power indicative of the received signal strength from the endpoint by the remote transceiver for each unique endpoint-remote transceiver pair; and

determining the plurality of signal quality indications based on the received uplink power associated with each of the plurality of unique endpoint-remote transceiver pairs.

7. The method of claim 1:

further comprising;

determining a shadowing effect associated with each wireless connection for each of the plurality of unique endpoint-remote transceiver pairs; and

determining a multipath effect associated with each wireless connection for each of the plurality of unique endpoint-remote transceiver pairs;

wherein determining the power distribution is further based on the determined shadowing effect and multipath effect associated with each wireless connection for each of the plurality of unique endpoint-remote transceiver pairs.

8. One or more computer-readable non-transitory storage media embodying software that when executed by a processor is operable to:

establish a connection between a base station and a plurality of remote transceivers;

establish a plurality of wireless connections with a plurality of endpoints via one or more of the plurality of remote transceivers;

determine a plurality of signal quality indications, each signal quality indication associated with a different one of a plurality of unique endpoint-remote transceiver pairs; and

determine a power distribution for the plurality of remote transceivers based on the plurality of signal quality indications and an optimization equation configured to optimize a data throughput associated with the plurality of wireless connections by determining a power gain for each of the wireless connections.

9. The media of claim 8, wherein the software when executed by a process is further operable to determine the power distribution based on a transmission power associated with each of the plurality of remote transceivers.

10. The media of claim 8, wherein the software that when executed by a process is operable to:

establish a plurality of wireless connections with a plurality of endpoints is further operable to assign one or more subcarriers to each of the plurality of endpoints; and

determine the power distribution for the plurality of remote transceivers is further operable to determine a power gain for each of the subcarriers as transmitted by each of the remote transceivers.

11. The media of claim 10, wherein the software when executed by a process is further operable to assign an approximately equal amount of power to each of the subcarriers assigned to a first endpoint with respect to a first remote transceiver.

12. The media of claim 8:

wherein the software when executed by a process is further operable to determine an inter-cell interference; and

wherein the software when executed by a processor is further operable to determine the power distribution based on the determined inter-cell interference.

13. The media of claim 8, wherein the software that when executed by a process is operable to determine a plurality of signal quality indications is further operable to:

receive an uplink power associated with each of the plurality of unique endpoint-remote transceiver pairs, the uplink power indicative of the received signal strength from the endpoint by the remote transceiver for each unique endpoint-remote transceiver pair; and

determine the plurality of signal quality indications based on the received uplink power associated with each of the plurality of unique endpoint-remote transceiver pairs.

14. The media of claim 8:

wherein the software when executed by a process is further operable to;

determine a shadowing effect associated with each wireless connection for each of the plurality of unique endpoint-remote transceiver pairs; and

determine a multipath effect associated with each wireless connection for each of the plurality of unique endpoint-remote transceiver pairs; and

wherein the software when executed by a process is further operable to determine the power distribution based on the determined shadowing effect and multipath effect associated with each wireless connection for each of the plurality of unique endpoint-remote transceiver pairs.

15. A system for adjusting power distribution comprising:

an interface configured to;

establish a connection between a base station and a plurality of remote transceivers; and

establish a plurality of wireless connections with a plurality of endpoints via one or more of the plurality of remote transceivers; and

a processor coupled to the interface and configured to;

determine a plurality of signal quality indications, each signal quality indication associated with a different one of a plurality of unique endpoint-remote transceiver pairs; and

determine a power distribution for the plurality of remote transceivers based on the plurality of signal quality indications and an optimization equation configured to optimize a data throughput associated with the plurality of wireless connections by determining a power gain for each of the wireless connections.

16. The system of claim 15, wherein the processor is further configured to determine the power distribution based on a transmission power associated with each of the plurality of remote transceivers.

17. The system of claim 15, wherein:

the interface configured to establish a plurality of wireless connections with a plurality of endpoints is further configured to assign one or more subcarriers to each of the plurality of endpoints; and

the processor configured to determine the power distribution for the plurality of remote transceivers is further configured to determine a power gain for each of the subcarriers as transmitted by each of the remote transceivers.

18. The system of claim 17, wherein the processor is further configured to assign an approximately equal amount of power to each of the subcarriers assigned to a first endpoint with respect to a first remote transceiver.

19. The system of claim 15:

wherein the processor is further configured to determine an inter-cell interference; and

wherein the processor is further configured to determine the power distribution based on the determined inter-cell interference.

20. The system of claim 15, wherein:

the interface is further configured to receive an uplink power associated with each of the plurality of unique endpoint-remote transceiver pairs, the uplink power indicative of the received signal strength from the endpoint by the remote transceiver for each unique endpoint-remote transceiver pair; and

the processor configured to determine a plurality of signal quality indications is further configured to determine the plurality of signal quality indications based on the received uplink power associated with each of the plurality of unique endpoint-remote transceiver pairs.

21. The system of claim 15:

wherein the processor is further configured to;

determine a shadowing effect associated with each wireless connection for each of the plurality of unique endpoint-remote transceiver pairs; and

determine a multipath effect associated with each wireless connection for each of the plurality of unique endpoint-remote transceiver pairs;

wherein the processor is further configured to determine the power distribution based on the determined shadowing effect and multipath effect associated with each wireless connection for each of the plurality of unique endpoint-remote transceiver pairs.