System and Method for Implementing Power Distribution

• US 20110223960A1
• Filed: 10/21/2010
• 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 9,154,193 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

A method for adjusting power distribution that 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 receiving a signal quality indication from each of the plurality of remote transceivers for any endpoint for which the remote transceiver is able to receive a wireless communication. The method additionally includes determining a power distribution for the plurality of remote transceivers based on the received signal quality indication from each of the remote transceivers. The method also includes transmitting a control signal to the plurality of remote transceivers. The control signal comprises the power distribution and is indicative of the amount of power each remote transceiver is to use for each endpoint when transmitting wireless communications.

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;

receiving a signal quality indication from each of the plurality of remote transceivers for any endpoint for which the remote transceiver is able to receive a wireless communication;

determining a power distribution for the plurality of remote transceivers based on the received signal quality indication from each of the remote transceivers; and

transmitting a control signal to the plurality of remote transceivers, the control signal comprising the power distribution and indicative of the amount of power each remote transceiver is to use for each endpoint when transmitting wireless communications.

2. The method of claim 1, wherein establishing the connection between the base station and the plurality of remote transceivers comprises establishing a Common Public Radio Interface connection between the base station and the plurality of remote transceivers.

3. The method of claim 1, further comprising transmitting a data signal to each of the plurality of remote transceivers, each remote transceiver receiving the same data signal.

4. The method of claim 1, wherein determining the power distribution comprises increasing the power distribution for wireless connections having a better relative signal quality indication and decreasing the power distribution for wireless connections having a worse relative signal quality indication.

5. The method of claim 1, further comprising receiving combined in-phase/quadrature (I/Q) data, the combined I/Q data comprising a combination of data received at each of the plurality of remote transceivers from the plurality of endpoints.

6. A method for adjusting power distribution comprising:

establishing a connection between a base station and a remote transceiver, the remote transceiver being one of a plurality of remote transceivers connected to the base station;

establishing a plurality of wireless connections with a plurality of endpoints via the remote transceiver;

receiving a control signal from the base station, the control signal comprising a power distribution indicative of the amount of power the remote transceiver is to use for each endpoint of the plurality of endpoints when transmitting wireless communications;

receiving transmit data comprising data to be transmitted to the plurality of endpoints;

modifying the transmit data bases on the power distribution; and

transmitting the modified data to the plurality of endpoints.

7. The method of claim 6, further comprising:

receiving a communication from at least one endpoint of the plurality of endpoints, the communication comprising first data;

determining at least one signal quality indication associated with the communication from the at least one endpoint;

receiving second data from at least one of the plurality of remote transceivers, the second data originating from the at least one endpoint;

combining the first data and the second data to generate combined data; and

transmitting the combined data and the at least one signal quality indication to the base station.

8. The method of claim 6, wherein:

receiving a control signal from the base station comprises receiving a common public radio interface (CPRI) control signal from the base station over a CPRI control channel; and

receiving transmit data comprises receiving in-phase/quadrature (I/Q) data from the base station.

9. 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;

receive a signal quality indication from each of the plurality of remote transceivers for any endpoint for which the remote transceiver is able to receive a wireless communication;

determine a power distribution for the plurality of remote transceivers based on the received signal quality indication from each of the remote transceivers; and

transmit a control signal to the plurality of remote transceivers, the control signal comprising the power distribution and indicative of the amount of power each remote transceiver is to use for each endpoint when transmitting wireless communications.

10. The media of claim 9, wherein the software that when executed is operable to establish the connection between the base station and the plurality of remote transceivers comprises software that when executed is operable to establish a Common Public Radio Interface connection between the base station and the plurality of remote transceivers.

11. The media of claim 9, wherein the software is further operable to transmit a data signal to each of the plurality of remote transceivers, each remote transceiver receiving the same data signal.

12. The media of claim 9, wherein the software that when executed is operable to determine the power distribution comprises software that when executed is operable to increase the power distribution for wireless connections having a better relative signal quality indication and decrease the power distribution for wireless connections having a worse relative signal quality indication.

13. The media of claim 9, wherein the software is further operable to receive combined in-phase/quadrature (I/Q) data, the combined I/Q data comprising a combination of data received at each of the plurality of remote transceivers from the plurality of endpoints.

14. 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 remote transceiver, the remote transceiver being one of a plurality of remote transceivers connected to the base station;

establish a plurality of wireless connections with a plurality of endpoints via the remote transceiver;

receive a control signal from the base station, the control signal comprising a power distribution indicative of the amount of power the remote transceiver is to use for each endpoint of the plurality of endpoints when transmitting wireless communications;

receive transmit data comprising data to be transmitted to the plurality of endpoints;

modify the transmit data based on the power distribution; and

transmit the modified data to the plurality of endpoints.

15. The media of claim 14, wherein the software is further operable to:

receive a communication from at least one endpoint of the plurality of endpoints, the communication comprising first data;

determine at least one signal quality indication associated with the communication from the at least one endpoint;

receive second data from at least one of the plurality of remote transceivers, the second data originating from the at least one endpoint;

combine the first data and the second data to generate combined data; and

transmit the combined data and the at least one signal quality indication to the base station.

16. The media of claim 14, wherein the software that when executed is operable to:

receive a control signal from the base station comprises software that when executed is operable to receive a common public radio interface (CPRI) control signal from the base station over a CPRI control channel; and

receive transmit data comprises software that when executed is operable to receive in-phase/quadrature (I/Q) data from the base station.

17. A system for adjusting power distribution comprising:

an interface configured 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; and

receive a signal quality indication from each of the plurality of remote transceivers for any endpoint for which the remote transceiver is able to receive a wireless communication; and

a processor coupled to the interface and configured to determine a power distribution for the plurality of remote transceivers based on the received signal quality indication from each of the remote transceivers; and

wherein the interface is further configured to transmit a control signal to the plurality of remote transceivers, the control signal comprising the power distribution and indicative of the amount of power each remote transceiver is to use for each endpoint when transmitting wireless communications.

18. The system of claim 17, wherein the interface configured to establish the connection between the base station and the plurality of remote transceivers is further configured to establish the connection via a Common Public Radio Interface connection between the base station and the plurality of remote transceivers.

19. The system of claim 17, wherein the interface is further configured to transmit a data signal to each of the plurality of remote transceivers, each remote transceiver receiving the same data signal.

20. The system of claim 17, wherein the processor configured to determine the power distribution is further configured to increase the power distribution for wireless connections having a better relative signal quality indication and decrease the power distribution for wireless connections having a worse relative signal quality indication.

21. The system of claim 17, wherein the interface is further configured to receive combined in-phase/quadrature (I/Q) data, the combined I/Q data comprising a combination of data received at each of the plurality of remote transceivers from the plurality of endpoints.

22. A system for adjusting power distribution comprising:

an interface configured to;

establish a connection between a base station and a remote transceiver, the remote transceiver being one of a plurality of remote transceivers connected to the base station;

establish a plurality of wireless connections with a plurality of endpoints via the remote transceiver;

receive a control signal from the base station, the control signal comprising a power distribution indicative of the amount of power the remote transceiver is to use for each endpoint of the plurality of endpoints when transmitting wireless communications; and

receive transmit data comprising data to be transmitted to the plurality of endpoints; and

a processor coupled to the interface and configured to modify the transmit data based on the power distribution; and

wherein the interface is further configured to transmit the modified data to the plurality of endpoints.

23. The system of claim 22, wherein:

the interface is further configured to receive a communication from at least one endpoint of the plurality of endpoints, the communication comprising first data;

the processor is further configured to determine at least one signal quality indication associated with the communication from the at least one endpoint;

the interface is further configured to receive second data from at least one of the plurality of remote transceivers, the second data originating from the at least one endpoint;

the processor is further configured to combine the first data and the second data to generate combined data; and

the interface is further configured to transmit the combined data and the at least one signal quality indication to the base station.

24. The system of claim 22, wherein:

the interface configured to receive a control signal from the base station is further configured to receive a common public radio interface (CPRI) control signal from the base station over a CPRI control channel; and

the interface configured to receive transmit data is further configured to receive in-phase/quadrature (I/Q) data from the base station.