Dynamic channel reuse in multi-access communication systems

• US 8,886,203 B2
• Filed: 12/28/2011
• Issued: 11/11/2014
• Est. Priority Date: 12/28/2011
• Status: Expired due to Fees

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Katar, Srinivas, Zhu, Hao, Yonge, Lawrence Winston III, Krishnam, Manjunath Anandarama, Kostoff, Stanley J. II
• Primary Examiner(s): PATEL, MAHENDRA R
• Application Number:
  US13/338,384
• Publication Number:
  US 20130171999A1
• Time in Patent Office: 1,049 Days
• Field of Search: 455/450, 455/447, 455/452.2, 455/62, 455/436, 455/562.1, 455/501, 455/434, 455/67.11, 455/63.1, 370/332, 370/337, 370/350, 370/328, 370/338, 370/252, 375/285
• US Class Current: 455/447
• CPC Class Codes: H04B 2203/5408 using protocols
• CPC Class Codes: H04B 3/544 Setting up communications; Call and signalling arrangements
• CPC Class Codes: H04W 84/20 Master-slave selection or change arrangements

Abstract

Dynamic channel reuse in multi-access communication systems. A first station in a communication network may receive a transmission over a communication medium. The first station may generate a reuse determination based on information from the received transmission. The reuse determination may be usable with at least one other reuse determination to coordinate reuse of the communication medium.

Claims

1. A method performed by a first station in a local network, the method comprising:

receiving a first transmission over a communication medium;

generating a first reuse determination based, at least in part, on received signal strength information regarding the first transmission, the first reuse determination indicating whether to reuse the communication medium with other stations; and

receiving at least one other reuse determination from a neighbor station in a neighbor network different than the local network, wherein the first reuse determination is coordinated with the at least one other reuse determination to coordinate reuse of the communication medium with the other stations.

2. The method of claim 1,

wherein the first transmission is received from a second station and includes statistical information on signals received by the second station from one or more other stations, and

wherein the first reuse determination is further based on the statistical information.

3. The method of claim 2, further comprising providing the first reuse determination from the first station to a coordinator station.

4. The method of claim 3, wherein the coordinator station is configured to use the first reuse determination and other reuse determinations corresponding to at least some other stations within the local network to make a network reuse determination, and wherein the coordinator station is further configured to provide the network reuse determination to the other stations within the local network.

5. The method of claim 1, further comprising:

receiving a second transmission;

determining whether the second transmission is from a local station in the local network or the neighbor station from the neighbor network, wherein said determining is based on a header of the second transmission; and

applying or bypassing the first reuse determination based on said determining.

6. The method of claim 1, further comprising:

receiving multiple transmissions, including the first transmission, over the communication medium, wherein each of the multiple transmissions includes statistical information on signals received from one or more other stations,

wherein the first reuse determination is further based on the statistical information included in the multiple transmissions.

7. The method of claim 6, wherein the first station is a coordinator station, the method further comprising providing the first reuse determination from the first station to the one or more other stations of the local network.

8. The method of claim 1, wherein the first reuse determination is further based on received signal strength information regarding a second transmission received by the first station.

9. The method of claim 1, further comprising sending the first reuse determination from the first station to the neighbor station.

10. The method of claim 8, wherein the second transmission is received by the first station from a second station, the second transmission comprising statistical information regarding signal strengths of other signals received at the second station.

11. The method of claim 1, further comprising:

updating the first reuse determination to indicate to share the communication medium rather than reuse the communication medium when either of the first reuse determination or the at least one other reuse determination indicates to share the communication medium.

12. The method of claim 1, wherein the first reuse determination is coordinated with a second reuse determination from a second station of the local network, the second station being different from the first station.

13. The method of claim 1, wherein the local network includes a central coordinator configured to perform reuse coordination based on reuse determinations from a plurality of stations.

14. The method of claim 13, further comprising sending the first reuse determination from the first station to the central coordinator.

15. The method of claim 1, wherein the first reuse determination is a local network level determination.

16. The method of claim 1, wherein the first transmission is received from a second station via a link between the first station and the second station, and wherein the first reuse determination is coordinated for the link between the first station and the second station.

17. The method of claim 1, further comprising:

detecting a legacy station in the local network; and

adjusting a threshold associated with the first reuse determination responsive to detecting the legacy station in the local network.

18. The method of claim 17, further comprising:

partitioning the local network into a first sub-network that includes the first station and at least one other station, and a second sub-network that includes the legacy station,

wherein the first reuse determination comprises reusing the communication medium for stations in the first sub-network, and

wherein the first reuse determination comprises sharing the communication medium for stations in the second sub-network.

19. The method of claim 1, wherein the first reuse determination is further based on a transmission frequency of a second station from which the first transmission was received.

20. The method of claim 1, wherein the first reuse determination further indicates which stations of a plurality of stations in the local network may reuse the communication medium in a same time slot as stations of a plurality of others stations on the neighbor network, wherein transmissions in the local network are performed according to a time division multiple access (TDMA) protocol.

21. The method of claim 1, wherein the local network is a powerline network.

24. The method of claim 1, wherein the first reuse determination indicates either to reuse the communication medium using concurrent transmissions or to share the communication medium using contention based access.

22. A non-transitory computer-readable storage medium storing program instructions, wherein the program instructions are computer-executable to cause a first station in a local network to perform operations comprising:

receiving a first transmission over a communication medium;

generating a first reuse determination based, at least in part, on received signal strength information regarding the first transmission, the first reuse determination indicating whether to reuse the communication medium with other stations; and

receiving at least one other reuse determination from a neighbor station in a neighbor network different than the local network, wherein the first reuse determination is coordinated with the at least one other reuse determination to coordinate reuse of the communication medium with the other stations.

23. A system, comprising:

a first station in a local network configured to;

receive a first transmission over a communication medium;

generate a first reuse determination based, at least in part, on received signal strength information regarding the first transmission, the first reuse determination indicating whether to reuse the communication medium with other stations; and

receive at least one other reuse determination from a neighbor station in a neighbor network different than the local network, wherein the first reuse determination is coordinated with the at least one other reuse determination to coordinate reuse of the communication medium with the other stations.