Bearer selection and negotiation in autonomous dynamic spectrum access systems

• US 20080113667A1
• Filed: 11/10/2006
• Published: 05/15/2008
• Est. Priority Date: 11/10/2006
• Status: Active Grant

• Current Assignee: Raytheon Company (Rtx Corporation)
• Original Assignee: POWERWAVE COGNITION, INC.
• Inventors: Ahmed, Mohiuddin, Seidel, Scott Y.
• Granted Patent: US 8,014,783 B2
• Time in Patent Office: Days
• US Class Current: 455/434
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

Communicating between a plurality of nodes includes sensing spectrum activity on at least one channel; generating spectrum awareness data based at least in part on the sensed spectrum activity; determining at least one selected bearer based on the spectrum awareness data; negotiating among nodes to select at least one bearer based on various spectral use criteria.

Claims

1. A method for communicating between a plurality of nodes, comprising:

sensing spectrum activity on at least one channel;

generating spectrum awareness data based at least in part on the sensed spectrum activity;

determining at least one selected bearer based on the spectrum awareness data.

2. The method of claim 1, further comprising:

informing at least one neighbor node of the at least one selected bearer.

3. The method of claim 1, further comprising:

negotiating with at least one neighbor node to establish at least one bearer.

4. The method of claim 1, where determining at least one selected bearer based on the spectrum awareness data further comprises:

determining the at least one selected bearer based on external data, the external data including policy awareness data.

5. The method of claim 1, where negotiating with at least one neighbor node to establish at least one bearer comprises:

sending a bearer proposal message to the at least one neighbor node, wherein the bearer proposal message identifies the at least one selected bearer.

6. The method of claim 1, further comprising:

receiving a bearer proposal message from the at least one neighbor node, wherein the bearer proposal message identifies at least one proposed bearer;

analyzing the at least one proposed bearer based at least in part on at least part of the spectrum awareness data; and

if the at least one proposed bearer is acceptable, according to the spectrum awareness data;

sending an acknowledgement message to the at least one neighbor node; and

using the proposed bearer to communicate with the at least one neighbor node.

7. The method of claim 1, where determining at least one selected bearer based on the spectrum awareness data further comprises:

determining the at least one selected bearer based at least in part on a system policy objective selected from a group consisting of attempting to converge to at least one common bearer and attempting to diverge to at least two different bearers.

8. The method of claim 1, where determining at least one selected bearer based on the spectrum awareness data further comprises:

evaluating the at least one channel based at least in part policy awareness data.

9. The method of claim 1, further comprising:

receiving at least a portion of a neighbor node'"'"'s spectrum awareness data;

storing at least a portion of the neighbor node'"'"'s spectrum awareness data; and

where determining at least one selected bearer based on the spectrum awareness data further comprises;

determining at least one selected bearer based on at least one neighbor node'"'"'s spectrum awareness data.

10. The method of claim 1, further comprising:

determining at least one change in the spectrum awareness data; and

where determining at least one selected bearer based on the spectrum awareness data further comprises;

determining at least one selected bearer based on the at least one change in the spectrum awareness data.

11. The method of claim 1, further comprising:

determining whether to release a bearer, and if so;

sending a bearer release message to at least one neighbor node; and

releasing the bearer.

12. The method of claim 1, further comprising:

receiving a bearer release message from at least one neighbor node and in response;

releasing a bearer; and

switching to a new bearer.

13. A mobile node operable to communicate with one or more other mobile nodes, comprising:

an interface operable to;

send and receive signals;

sense spectrum activity on at least one channel; and

one or more processors, where one or more of the one or more processors are configured to;

generate spectrum awareness data based at least in part on the sensed spectrum activity;

determine at least one selected bearer based on the spectrum awareness data.

14. The wireless node of claim 13, where one or more processors are further configured to:

inform at least one neighbor node of the at least one selected bearer.

15. The wireless node of claim 13, where one or more processors are further configured to:

negotiate with at least one neighbor node to establish at least one bearer.

16. The wireless node of claim 13, where determining at least one selected bearer based on the spectrum awareness data further comprises:

determine the at least one selected bearer based on external data, the external data including policy awareness data.

17. The wireless node of claim 13, where when negotiating with at least one neighbor node to establish at least one bearer, one or more processors are further configured to:

send a bearer proposal message to the at least one neighbor node, wherein the bearer proposal message identifies the at least one selected bearer.

18. The wireless node of claim 13, where one or more processors are further configured to:

receive a bearer proposal message from the at least one neighbor node, wherein the bearer proposal message identifies at least one proposed bearer;

analyze the at least one proposed bearer based at least in part on at least part of the spectrum awareness data; and

if the at least one proposed bearer is. acceptable, according to the spectrum awareness data;

send an acknowledgement message to the at least one neighbor node; and

use the proposed bearer to communicate with the at least one neighbor node.

19. The wireless node of claim 13, where when determining at least one selected bearer based on the spectrum awareness data, one or more processors are further configured to:

determine the at least one selected bearer based at least in part on a system policy objective selected from a group consisting of attempting to converge to at least one common bearer and attempting to diverge to at least two different bearers.

20. The wireless node of claim 13, where when determining at least one selected bearer based on the spectrum awareness data, one or more processors are further configured to:

evaluate the at least one channel based at least in part on policy awareness data.

21. The wireless node of claim 13, where one or more processors are further configured to:

receive at least a portion of a neighbor node'"'"'s spectrum awareness data;

store the at least a portion of the neighbor node'"'"'s spectrum awareness data; and

where when determining at least one selected bearer based on the spectrum awareness data, one or more processors are further configured to;

determine at least one selected bearer based on at least one neighbor node'"'"'s spectrum awareness data.

22. The method of claim 13, where one or more processors are further configured to:

determine at least one change in the spectrum awareness data; and

where when determining at least one selected bearer based on the spectrum awareness data, one or more processors are further configured to;

determine at least one selected bearer based on the at least one change in the spectrum awareness data.

23. The wireless node of claim 13, where one or more processors are further configured to:

determine whether to release a bearer, and if so;

send a bearer release message to at least one neighbor node; and

release the bearer.

24. The wireless node of claim 13, where one or more processors are further configured to:

receive a bearer release message from at least one neighbor node and in response;

release a bearer; and

switching to a new bearer.

25. A system for establishing communications between a plurality of nodes, comprising:

means for sensing spectrum activity on at least one channel;

means for generating spectrum awareness data based at least in part on the sensed spectrum activity;

means for determining at least one selected bearer based on the spectrum awareness data;

means for negotiating at least one selected bearer based on a neighbor node'"'"'s selected bearer;

means for negotiating at least one selected bearer based on at least one policy entry.