Spectrum Management in Dynamic Spectrum Access Wireless Systems

• US 20080259859A1
• Filed: 09/14/2006
• Published: 10/23/2008
• Est. Priority Date: 09/16/2005
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Birru, Dagnachew, Cordeiro, Carlos
• Granted Patent: US 9,137,805 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 72/563 of the wireless resources

Abstract

A plurality of MAC/PHY stacks is adapted to support wireless devices. A superframe structure includes a preamble and a superframe initialization header.

Claims

1. A wireless communication network, comprising:

a base station having a plurality of medium access control (MAC) and physical (PHY) layer stacks; and

a spectrum manager adapted to assign each of the stacks to a respective one available restricted frequency channel or to a respective set of contiguous available restricted frequency channels among at least one unavailable frequency channels.

2. A wireless communication network as recited in claim 1, wherein the spectrum manager is adapted to reassign each of the stacks dynamically.

3. A wireless communication network as recited in claim 1, further comprising a plurality of secondary wireless stations (STAs) and at least one incumbent device adapted to occupy one or more of the available restricted frequency channels.

4. A wireless communication network as recited in claim 3, wherein the spectrum manager is adapted to determine an availability of the restricted channels for use by the plurality of secondary wireless stations (STAs) within the network

5. A wireless communication network as recited in claim 3, wherein the spectrum manager is adapted to determine transmission requirements of the plurality of secondary wireless stations (STAs) within the network

6. In a wireless communication system, a method of wireless communication, comprising:

providing a base station having a plurality of medium access control (MAC) and physical (PHY) layer stacks; and

assigning each of the stacks to a respective one available restricted frequency channel or to a respective a set of contiguous available restricted frequency channels among at least one unavailable frequency channels.

7. A method as recited in claim 6, further comprising, before the assigning, determining availability of the restricted channels for use by secondary wireless stations (STAs) within the network.

8. A method as recited in claim 6, further comprising, before the assigning, determining transmission requirements of secondary wireless stations (STAs) within the network.

9. A method as recited in claim 8, wherein the determining further comprises determining respective locations of the STAs and selecting an appropriate restricted frequency channel or an appropriate set of contiguous channels from the available restricted frequency channels based on the locations.

10. A method as recited in claim 6, further comprising, after the assigning, altering the assignment of the stacks to the available restricted frequency channels in response to changes in availability, or needs of the STAs, or both.

11. In a wireless communication system, a method of wireless communication, comprising:

transmitting a preamble field and a superframe initialization header (SIH) field in parallel to each of a plurality of restricted channels occupied by a base station; and

synchronizing a secondary wireless station (STA) after receiving the preamble and SIH at the STA.

12. A method as recited in claim 11, wherein the transmitting occurs at a beginning of a superframe.

13. A method as recited in claim 11, wherein the synchronizing further comprises altering a transmission and a reception characteristic of the STA after the receiving.

14. A method as recited in claim 12, further comprising:

updating the SIH field prior to a next superframe; and

transmitting the preamble and updated SIH field in the next superframe.

15. A method as recited in claim 11, wherein the receiving further comprises scanning at least one of the plurality of restricted channels.

16. A method as recited in claim 12, wherein the superframe comprises a plurality of frames.

17. A method as recited in claim 11, wherein the SIH includes one or more of:

a number of frames per superframe;

a duration of each frame;

a next scheduled quiet period;

a quiet period duration;

a sender transmit power;

a sender location information.

18. A data communication in a plurality of restricted channels, comprising:

a superframe having a preamble field and a superframe initialization header (SIH) field, wherein the SIH field includes information of the restricted channels occupied by a base station.

19. A data communication as recited in claim 18, wherein the SIH further includes one or more of:

a number of frames per superframe;

a duration of each frame;

a next scheduled quiet period;

a quiet period duration;

a sender transmit power;

a sender location information.

20. A data communication as recited in claim 18, wherein the restricted channels further comprises a set of available restricted contiguous channels, wherein the set of contiguous channels is separated from another available restricted channel or another set of contiguous available restricted channels by an unavailable restricted channel or channels.