System and method for implementing power distribution

• US 9,154,193 B2
• Filed: 10/21/2010
• Issued: 10/06/2015
• Est. Priority Date: 03/10/2010
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Chen, Wei-Peng, Zhu, Chenxi, Naito, Takao
• Primary Examiner(s): Nguyen, Duc M
• Application Number:
  US12/909,151
• Publication Number:
  US 20110223960A1
• Time in Patent Office: 1,811 Days
• Field of Search: 455/522, 455/115.1, 455/127.2, 455/16, 455/13.4, 370/315, 370/318, 370/328
• US Class Current: 1/1
• 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, from a first remote transceiver of the plurality of remote transceivers, combined in-phase/quadrature (I/Q) data, the combined I/Q data comprising a combination of first I/Q data and second I/Q data, wherein;

the first I/Q data comprises I/Q data received at the first remote transceiver from a first endpoint of the plurality of endpoints; and

the second I/Q data comprises I/Q data received at a second remote transceiver of the plurality of remote transceivers originating from the first endpoint and transmitted from the second remote transceiver to the first remote transceiver;

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;

wherein the signal quality indications are determined based on a measured uplink power received at each of the remote transceivers from the endpoints 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 indications 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. 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 communication from at least one endpoint of the plurality of endpoints, the communication comprising first in-phase/quadrature (I/Q) data;

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

wherein the determining at least one signal quality indication is based on a measured uplink power received from the at least one endpoint;

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

combining the first I/Q data and the second I/Q data to generate combined I/Q data;

transmitting the combined I/Q data and the at least one signal quality indication to the base station;

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 based on the power distribution; and

transmitting the modified data to the plurality of endpoints.

6. The method of claim 5, 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.

7. 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, from a first remote transceiver of the plurality of remote transceivers, combined in-phase/quadrature (I/Q) data, the combined I/Q data comprising a combination of first I/Q data and second I/Q data, wherein;

the first I/Q data comprises I/Q data received at the first remote transceiver from a first endpoint of the plurality of endpoints; and

the second I/Q data comprises I/Q data received at a second remote transceiver of the plurality of remote transceivers originating from the first endpoint and transmitted from the second remote transceiver to the first remote transceiver;

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;

wherein the signal quality indications are determined based on a measured uplink power received at each of the remote transceivers from the endpoints 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 indications 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.

8. The media of claim 7, 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.

9. The media of claim 7, 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.

10. The media of claim 7, 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.

11. 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 communication from at least one endpoint of the plurality of endpoints, the communication comprising first in-phase/quadrature (I/Q) data;

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

wherein the determining at least one signal quality indication is based on a measured uplink power received from the at least one endpoint;

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

combine the first I/Q data and the second I/Q data to generate combined I/Q data;

transmit the combined I/Q data and the at least one signal quality indication to the base station;

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.

12. The media of claim 11, 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.

13. 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, from a first remote transceiver of the plurality of remote transceivers, combined in-phase/quadrature (I/Q) data, the combined I/Q data comprising a combination of first I/Q data and second I/Q data, wherein;

the first I/Q data comprises data received at the first remote transceiver from a first endpoint of the plurality of endpoints; and

the second I/Q data comprises data received at a second remote transceiver of the plurality of remote transceivers originating from the first endpoint and transmitted from the second remote transceiver to the first remote transceiver;

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;

wherein the signal quality indications are determined based on a measured uplink power received at each of the remote transceivers from the endpoints 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 indications 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.

14. The system of claim 13, 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.

15. The system of claim 13, 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.

16. The system of claim 13, 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.

17. 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 communication from at least one endpoint of the plurality of endpoints, the communication comprising first in-phase/quadrature (I/Q) data; and

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

a processor coupled to the interface and configured to;

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

wherein the determining at least one signal quality indication is based on a measured uplink power received from the at least one endpoint; and

combine the first I/Q data and the second I/Q data to generate combined I/Q data;

wherein the interface is further configured to;

transmit the combined I/Q data and the at least one signal quality indication to the base station;

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;

wherein the processor is further 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.

18. The system of claim 17, 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.