Method and system for dynamic spectrum allocation, and computer program product therefor

• US 8,000,715 B2
• Filed: 08/03/2006
• Issued: 08/16/2011
• Est. Priority Date: 08/04/2005
• Status: Active Grant

• Current Assignee: STMicroelectronics SRL (STMicroelectronics NV)
• Original Assignee: STMicroelectronics SRL (STMicroelectronics NV)
• Inventors: Melpignano, Diego, Mahonen, Petri H.
• Primary Examiner(s): Afshar, Kamran
• Assistant Examiner(s): WANG-HURST, KATHY W
• Application Number:
  US11/462,197
• Publication Number:
  US 20100238868A1
• Time in Patent Office: 1,839 Days
• Field of Search: 455450-454, 370310-350
• US Class Current: 455/451
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 48/10 using broadcasted information

Abstract

A communication network such as a cellular network or a WLAN includes a set of user terminals. Within the communication network, a system dynamically controls spectrum usage. The system includes a functionality sensor for sensing spectrum usage within the area covered by the communication network, and a policy server for producing, as a function of the sensed spectrum usage, spectrum usage policies for the communication network. A broadcasting arrangement broadcasts the spectrum usage policies to the user terminals. The system is applicable to cognitive radio systems.

Claims

1. A method of dynamically controlling spectrum usage in a communication network including a plurality of user terminals and at least one base station communicating with the plurality of user terminals, the method comprising:

using the at least one base station and the plurality of user terminals to sense spectrum usage within an area covered by the communication network;

using the at least one base station to generate spectrum usage policies for the communication network based upon the sensed spectrum usage;

using the at least one base station to broadcast and digitally sign the generated spectrum usage policies to the plurality of user terminals; and

using the at least one base station to monitor usage of the spectrum by the plurality of user terminals, to detect violations of the generated spectrum usage policies, and to block user terminals violating the generated spectrum usage policies, each respective user terminal configured to also monitor usage of the spectrum by other user terminals to detect violations of the generated spectrum usage policies.

2. The method of claim 1, wherein the communication network is configured as a cellular communication network;

and wherein generating the spectrum usage policies comprises generating specific spectrum usage policies for each cell in the cellular communication network, with the specific spectrum usage policies for each cell being broadcast to the user terminals served by the respective cell.

3. The method of claim 1, wherein the communication network is configured as a cellular communication network;

and wherein broadcasting the spectrum usage policies comprises sending the spectrum usage policies to the at least one base station to be broadcast to the user terminals in a respective cell in the cellular communication network.

4. The method of claim 1, wherein the generated spectrum usage policies are also based upon regulatory policy information.

5. The method of claim 1, further comprising marking the generated spectrum usage policies as valid only for a specific time interval.

6. The method of claim 1, further comprising caching the generated spectrum usage policies with the plurality of user terminals.

7. The method of claim 1, further comprising each respective user terminal verifying the generated spectrum usage policies broadcast thereto before using any frequency band conforming to the generated spectrum usage policies.

8. The method of claim 1, further comprising the plurality of user terminals accessing the communication network before selecting a frequency band conforming to the generated spectrum usage policies.

9. The method of claim 1, wherein the communication network is configured as a WLAN comprising at least one access point that determines the spectrum usage within an area covered by the WLAN;

and wherein determining the spectrum usage is performed by the at least one access point.

10. The method of claim 9, further comprising broadcasting the generated spectrum usage policies to the at least one access point.

11. The method of claim 10, wherein the generated spectrum usage policies are broadcast to the at least one access point by at least one of an IP broadcast, an IP multicast, and a broadcast MAC address.

12. A system for dynamically controlling spectrum usage in a communication network including a plurality of user terminals and at least one base station communicating with the plurality of user terminals, the system comprising:

a functionality sensor configured to sense spectrum usage within an area covered by the communication network;

a policy server configured to generate spectrum usage policies for the communication network based upon the sensed spectrum usage; and

a broadcaster configured to broadcast the generated spectrum usage policies to the plurality of user terminals;

said policy server configured to digitally sign the spectrum usage policies for broadcast to the plurality of user terminals, to monitor usage of the spectrum by the plurality of user terminals, to detect violations of the generated spectrum usage policies, and to block user terminals violating the generated spectrum usage policies, each respective user terminal configured to also monitor usage of the spectrum by other user terminals to detect violations of the generated spectrum usage policies.

13. The system of claim 12, wherein the communication network is configured as a cellular communication network;

wherein said policy server is configured to generate the spectrum usage policies for each cell in the cellular communication network; and

wherein said broadcaster is configured to broadcast the specific spectrum usage policies to the user terminals served by each respective cell.

14. The system of claim 12, wherein the communication network is configured as a cellular communication network;

and wherein said at least one base station receives the generated spectrum usage policies, and also broadcasts the generated spectrum usage policies to the user terminals in a respective cell in the cellular communication network.

15. The system of claim 12, wherein said functionality sensor comprises at least one of the plurality of user terminals.

16. The system of claim 12, wherein the spectrum usage policies generated by said policy server are also based upon regulatory policy information.

17. The system of claim 12, wherein said policy server is configured to mark the generated spectrum usage policies as valid only for a specific time interval.

18. The system of claim 12, wherein each user terminal comprises a cache memory for caching the generated spectrum usage policies.

19. The system of claim 12, wherein each user terminal is configured to verify the generated spectrum usage policies broadcast thereto before using a frequency band conforming to the generated spectrum usage policies.

20. The system of claim 12, wherein each user terminal is configured to access the communication network before transitioning to a frequency band conforming to the generated spectrum usage policies.

21. The system of claim 12, wherein said functionality sensor is configured to monitor usage of the spectrum by the user terminals to detect violations of the generated spectrum usage policies.

22. The system of claim 12, wherein the communication network is configured as a WLAN;

and wherein said functionality sensor is configured as an access point operating in the WLAN.

23. The system of claim 22, wherein said broadcaster is configured to broadcast the generated spectrum usage policies to the access point.

24. The system of claim 23, wherein said broadcaster is configured to broadcast the generated spectrum usage policies to the access point via at least one of an IP broadcast, an IP multicast, and a broadcast MAC address.

25. A communication network comprising:

at least one functionality sensor configured to sense spectrum usage within an area covered by the communication network;

a policy server configured to generate spectrum usage policies for the communication network based upon the sensed spectrum usage, and to broadcast the generated spectrum usage policies; and

a plurality of user terminals configured to operate within the communication network and to receive the generated spectrum usage policies broadcast by said policy sever;

said policy server being configured to digitally sign the spectrum usage policies to be broadcast to said plurality of user terminals, to monitor usage of the spectrum by the plurality of user terminals, to detect violations of the generated spectrum usage policies, and to block user terminals violating the generated spectrum usage policies, each respective user terminal also configured to monitor usage of the spectrum within the area covered by the communication network to detect violations of the generated spectrum usage policies.

26. The communication network of claim 25, wherein the communication network is configured as a cellular communication network;

and wherein said at least one functionality sensor is configured as a base station.

27. The communication network of claim 25, wherein the communication network is configured as a WLAN;

and wherein said at least one functionality sensor is configured as an access point.

28. The communication network of claim 25, wherein the spectrum usage policies generated by said policy server are also based upon regulatory policy information.

29. The communication network of claim 25, wherein said at least one functionality sensor is configured to monitor usage of the spectrum by each user terminal to detect violations of the generated spectrum usage policies.

30. A non-transitory computer-readable medium having computer-executable instructions for causing a computer to dynamically control spectrum usage in a communication network including a plurality of user terminals and at least one base station communicating with the plurality of user terminals by performing steps comprising:

using the at least one base station and the plurality of user terminals to sense spectrum usage within an area covered by the communication network including a plurality of user terminals;

using the at least one base station to generate spectrum usage policies for the communication network based upon the sensed spectrum usage;

using the at least one base station to broadcast and digitally sign the generated spectrum usage policies to the plurality of user terminals;

using the at least one base station and the plurality of user terminals to monitor usage of the spectrum by other user terminals and for detecting violations of the generated spectrum usage policies; and

using the at least one base station to block user terminals violating the generated spectrum usage policies.

31. The non-transitory computer-readable medium of claim 30, wherein the communication network is configured as a cellular communication network;

and wherein generating the spectrum usage policies comprises generating specific spectrum usage policies for each cell in the cellular communication network, with the specific spectrum usage policies for each cell being broadcast to the user terminals served by the respective cell.

32. The non-transitory computer-readable medium of claim 30, wherein the communication network is configured as a cellular communication network comprising at least one base station serving the plurality of user terminals;

and wherein broadcasting the spectrum usage policies comprises sending the spectrum usage policies to the at least one base station to be broadcast to the user terminals in a respective cell in the cellular communication network.

33. The non-transitory computer-readable medium of claim 30, wherein the generated spectrum usage policies are also based upon regulatory policy information.

34. The non-transitory computer-readable medium of claim 30, further comprising marking the generated spectrum usage policies as valid only for a specific time interval.

35. The non-transitory computer-readable medium of claim 30, further comprising each respective user terminal verifying the generated spectrum usage policies broadcast thereto before using any frequency band conforming to the generated spectrum usage policies.

36. The non-transitory computer-readable medium of claim 30, wherein the communication network is configured as a WLAN comprising at least one access point that determines the spectrum usage within an area covered by the WLAN;

and wherein determining the spectrum usage is performed by the at least one access point.