System and method for reducing inter-cellsite interference in full-duplex communications

• US 10,560,244 B2
• Filed: 07/24/2013
• Issued: 02/11/2020
• Est. Priority Date: 07/24/2013
• Status: Active Grant

• Current Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Jana, Rittwik, Aggarwal, Vaneet, Ji, Lusheng, Panta, Rajesh Krishna, Ramakrishnan, Kadangode K., Rice, Christopher W., Shankaranarayanan, Nemmara K., Vaishampayan, Vinay Anant
• Primary Examiner(s): Ulysse, Jael M
• Application Number:
  US13/949,704
• Publication Number:
  US 20150029906A1
• Time in Patent Office: 2,393 Days
• CPC Class Codes: H04L 27/32 Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex

Abstract

Disclosed herein are systems, methods, and computer-readable storage devices for reducing inter-cellsite interference during full-duplex communication. A system receives a channel amplitude and a phase estimate between a first station and a second station, the first station and the second station creating inter-cellsite interference on a channel during full-duplex communications. The system calculates a level of the inter-cellsite interference between the first station and the second station based on the channel amplitude and the phase estimate and generates a cancellation signal based on the inter-cellsite interference. The system then communicates the cancellation signal to the first station for transmission with additional data during additional full-duplex communications.

Claims

1. A method comprising:

identifying, at a central controller, inter-cellsite interference on a channel, the inter-cellsite interference caused by a first full-duplex, simultaneous and bi-directional communication on the channel between a first mobile station and a first base station and by a second full-duplex, simultaneous and bi-directional communication between a second mobile station and a second base station communicating on the channel, wherein only the first mobile station is in a region of shared range of both the first base station and the second base station, and wherein the inter-cellsite interface impacts the first mobile station;

receiving a channel amplitude and a phase estimate of the second full-duplex, simultaneous and bi-directional communication between the second mobile station and the second base station on the channel;

calculating, via a processor at the central controller, a level of the inter-cellsite interference based on the channel amplitude and the phase estimate;

generating, at the central controller, a cancellation signal based on the inter-cellsite interference; and

communicating, via a non-transitory medium, the cancellation signal from the central controller to the first base station for transmission with additional data during additional full-duplex communication between the first base station and the first mobile station, wherein the cancellation signal, when applied to the inter-cellsite interference, attenuates the inter-cellsite interference to a threshold level.

2. The method of claim 1, wherein the channel takes up a defined amount of space on an electromagnetic spectrum.

3. The method of claim 1, wherein the inter-cellsite interference occurs at a wireless device.

4. The method of claim 1, wherein the non-transitory medium comprises at least one of a fiber optic cable and a copper cable.

5. The method of claim 1, wherein the first transmission and a second transmission create the inter-cellsite interference.

6. A system comprising:

a processor; and

a computer-readable storage medium having instruction stored which, when executed by the processor, cause the processor performing operations comprising;

identifying inter-cellsite interference on a channel, the inter-cellsite interference caused by a first full-duplex, simultaneous and bi-directional communication on the channel between a first mobile station and a first base station and by a second full-duplex, simultaneous and bi-directional communication between a second mobile station and a second base station communicating on the channel, wherein only the first mobile station is in a region of shared range of both the first base station and the second base station, and wherein the inter-cellsite interface impacts the first mobile station;

receiving a channel amplitude and a phase estimate of the second full-duplex, simultaneous and bi-directional communication between the second mobile station and the second base station on the channel;

calculating a level of the inter-cellsite interference based on the channel amplitude and the phase estimate;

generating a cancellation signal based on the inter-cellsite interference; and

communicating the cancellation signal from the system to the first base station for transmission with additional data during additional full-duplex communication between the first base station and the first mobile station, wherein the cancellation signal, when applied to the inter-cellsite interference, attenuates the inter-cellsite interference to a threshold level.

7. The system of claim 6, wherein the channel takes up a defined amount of space on an electromagnetic spectrum.

8. The system of claim 6, wherein the inter-cellsite interference occurs at a wireless device.

9. The system of claim 6, wherein the non-transitory medium comprises at least one of a fiber optic cable and a copper cable.

10. The system of claim 6, wherein the first transmission and the second transmission create the inter-cellsite interference.

11. A computer-readable storage device having instruction stored which, when executed by a computing device, cause the computing device performing operations comprising:

identifying inter-cellsite interference on a channel, the inter-cellsite interference caused by a first full-duplex, simultaneous and bi-directional communication on the channel between a first mobile station and a first base station and by a second full-duplex, simultaneous and bi-directional communication between a second mobile station and a second base station communicating on the channel, wherein only the first mobile station is in a region of shared range of both the first base station and the second base station, and wherein the inter-cellsite interface impacts the first mobile station;

receiving a channel amplitude and a phase estimate of the second full-duplex, simultaneous and bi-directional communication between the second mobile station and the second base station on the channel;

calculating a level of the inter-cellsite interference based on the channel amplitude and the phase estimate;

generating a cancellation signal based on the inter-cellsite interference; and

communicating the cancellation signal from the computing device to the first base station for transmission with additional data during additional full-duplex communication between the first base station and the first mobile station, wherein the cancellation signal, when applied to the inter-cellsite interference, attenuates the inter-cellsite interference to a threshold level.

12. The computer-readable storage device of claim 11, wherein the channel takes up a defined amount of space on an electromagnetic spectrum.

13. The computer-readable storage device of claim 11, wherein the inter-cellsite interference occurs at a wireless device.

14. The computer-readable storage device of claim 11, wherein the non-transitory medium comprises at least one of a fiber optic cable and a copper cable.

15. The computer-readable storage device of claim 11, wherein the cancellation signal, when applied to the inter-cellsite interference, attenuates the inter-cellsite interference to a threshold level for interpretation.