Reducing multi-cell interference using cooperative random beam forming

• US 8,280,444 B1
• Filed: 02/26/2008
• Issued: 10/02/2012
• Est. Priority Date: 02/26/2008
• Status: Expired due to Fees

• Current Assignee: Adaptix, Inc. (Acacia Research Corporation)
• Original Assignee: Adaptix, Inc. (Acacia Research Corporation)
• Inventors: Shen, Manyuan, Xing, Guanbin, Shao, Xun
• Primary Examiner(s): Yun, Eugene
• Application Number:
  US12/037,758
• Time in Patent Office: 1,680 Days
• Field of Search: 455/562.1, 455/277.1, 455/450, 455/452, 455/62, 455/561, 455/524, 455/525, 455/575.7, 455/269
• US Class Current: 455/562.1
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04B 7/0606 Random or pseudo-random switching scheme
• CPC Class Codes: H04B 7/0695 using beam selection

Abstract

Systems and methods which implement cooperative random or quasi-random beam forming as between a plurality of base stations in a wireless network to reduce multi-cell interference are shown. For example, a plurality of base stations in a wireless network cooperate to provide frequency resources, such as channels, subchannels, subcarriers, etc., in a plurality of randomesque beams. In operation, subscriber stations preferably analyze signals as received on a plurality of the randomesque beams to determine one or more “best” beams for use in communication between the subscriber station and base station. Assuming an identified beam is available for use by the subscriber station, payload communications may be provided using one or more beams identified by the subscriber station as a “best” beam. The base stations of the wireless network preferably cooperate to periodically reform the randomesque beams.

Claims

1. A method comprising:

cooperatively at a plurality of base stations generating a plurality of randomesque beams for transmission of signals for analysis by a plurality of receiver stations, said plurality of randomesque beams comprising a set of randomesque beams associated with each base station of said plurality of base stations, each set of randomesque beams having different beam configurations for use with respect to each of a plurality of frequency resources, wherein a beam configuration used with respect to a first frequency resource of said plurality of frequency resources by a first base station of said plurality of base stations is substantially orthogonal to beam configurations used with respect to said first frequency resource by all other base stations of said plurality of base stations.

2. The method of claim 1, wherein said cooperatively generating said plurality of randomesque beams comprises:

coordinating calculation of beamforming vectors to provide said substantially orthogonal beam configurations.

3. The method of claim 1, wherein said cooperatively generating said plurality of randomesque beams comprises:

coordinating timing for said generating said plurality of randomesque beams.

4. The method of claim 1, wherein said cooperatively generating said plurality of randomesque beams comprises:

coordinating changing said beam configurations.

5. The method of claim 1, wherein said cooperatively generating said plurality of randomesque beams is provided by distributed processing of said plurality of base stations.

6. The method of claim 1, wherein said cooperatively generating said plurality of randomesque beams is provided by a centralized controller in communication with said plurality of base stations.

7. The method of claim 1, further comprising:

determining randomesque beam assignments for use in providing communications with respect to receiver stations of said plurality of receiver stations using received information regarding preferred randomesque beams from said receiver stations.

8. The method of claim 7, wherein said determining said randomesque beam assignments is performed cooperatively with respect to said plurality of base stations.

9. The method of claim 8, wherein said cooperative determinations for said randomesque beam assignments are made to provide load balancing between said base stations.

10. The method of claim 8, wherein said cooperative determinations for said randomesque beam assignments are made to optimize communication quality among said base stations.

11. The method of claim 8, wherein said cooperative determinations for said randomesque beam assignments are made to optimize communication capacity among said base stations.

12. A method comprising:

cooperatively at a plurality of base stations generating a plurality of randomesque beams for transmission of signals for analysis by a plurality of receiver stations, said randomesque beams having not been configured for use with respect to any particular receiver station of said receiver stations; and

determining a randomesque beam assignment for use in providing communications with respect to receiver stations of said plurality of receiver stations using information received from receiving stations of said plurality of receiving stations regarding preferred randomesque beams of said plurality of randomesque beams.

13. The method of claim 12, wherein said plurality of randomesque beams comprise a set of randomesque beams associated with each base station of said plurality of base stations, each set of randomesque beams having different beam configurations for use with respect to each of a plurality of frequency resources, wherein a beam configuration used with respect to a first frequency resource of said plurality of frequency resources by a first base station of said plurality of base stations is substantially orthogonal to beam configurations used with respect to said first frequency resource by all other base stations of said plurality of base stations.

14. The method of claim 12, wherein said cooperatively generating said plurality of randomesque beams comprises:

coordinating calculation of beamforming vectors to provide said substantially orthogonal beam configurations.

15. The method of claim 12, wherein said cooperatively generating said plurality of randomesque beams comprises:

coordinating timing for said generating said plurality of randomesque beams.

16. The method of claim 12, wherein said cooperatively generating said plurality of randomesque beams comprises:

coordinating changing said beam configurations.

17. The method of claim 12, wherein said determining said randomesque beam assignments is performed cooperatively with respect to said plurality of base stations.

18. The method of claim 17, wherein said cooperative determinations for said randomesque beam assignments are made to provide load balancing between said base stations.

19. The method of claim 17, wherein said cooperative determinations for said randomesque beam assignments are made to optimize communication quality among said base stations.

20. The method of claim 17, wherein said cooperative determinations for said randomesque beam assignments are made to optimize communication capacity among said base stations.

21. A system comprising:

a plurality of base stations adapted to cooperatively generate a plurality of randomesque beams for transmission of a signal for analysis by a plurality of subscriber stations, cooperatively determine a randomesque beam assignments for use in providing communications with respect to subscriber stations of said plurality of subscriber stations using information received from subscriber stations of said plurality of subscriber stations regarding preferred randomesque beams of said plurality of randomesque beams, and cooperatively periodically change beamforming vectors for said randomesque beams.

22. The system of claim 21, wherein said base stations are further adapted to obtain information regarding preferred randomesque beams from said plurality of subscriber stations, said information regarding said preferred randomesque beams being used by said subscriber stations to determine said randomesque beam assignments.

23. The system of claim 21, further comprising:

a plurality of subscriber stations adapted to analyze signal reception on said plurality of randomesque beams, identify preferred randomesque beams of said plurality of randomesque beams to one or more base stations of said plurality of base stations, and conduct data communication with at least one base station of said plurality of base stations using a preferred randomesque beam of said plurality of randomesque beams.

24. The system of claim 23, wherein said subscriber station is further adapted to update said at least one preferred channel-independent beam without control by said base station.