Method to request resources in TV white spaces type environment

• US 8,451,789 B2
• Filed: 06/15/2010
• Issued: 05/28/2013
• Est. Priority Date: 06/15/2010
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Corporation
• Inventors: Junell, Jari Henrik, Kasslin, Mika, Salokannel, Juha
• Primary Examiner(s): RIYAMI, ABDULLAH A
• Application Number:
  US12/815,620
• Publication Number:
  US 20110305206A1
• Time in Patent Office: 1,078 Days
• Field of Search: 455/63.1, 455/67.11, 455/69, 455/114.2, 455/313, 455/447, 455/515, 455/509, 455/522, 455/517, 370/250, 370/208, 370/252, 370/254, 370/260, 370/280, 370/281, 370/310, 370/328, 370/329, 370/330, 375/130, 375/295, 375/260
• US Class Current: 370/329
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks

Abstract

Method, apparatus, and computer program product embodiments are disclosed for independent wireless resource sharing on a fair basis to enable selecting the most suitable coexistence between wireless networks. Example embodiments of the invention include a hierarchical resource request process that enables reallocation of radio resources in a coexistence band. When new resources are requested by a network, a search is made for free resources in the coexistence band. If this does not succeed, a check is made for any allocated but unused resources in the coexistence band that have been advertised by neighboring networks. If there are insufficient advertised resources, then the allocation of resources in neighboring networks is analyzed and compared with the requesting network'"'"'s need for network resources. There are two graduated stages to the analysis. In an example light analysis stage, an analysis of the allocation of resources is limited to neighboring networks within the same network allocation group as the requesting network'"'"'s. In a more extensive analysis stage, all of the neighboring networks are analyzed. In this manner, a more complete resource reallocation may be achieved.

Claims

1. A method, comprising:

searching for at least one available free resource in a wireless network coexistence band by a coexistence manager, in response to a resource request from a coexistence enabler in a wireless network;

when there are insufficient available free resources in the coexistence band, then checking by the coexistence manager for availability of allocated but unused resources in the coexistence band, as advertised by one or more coexistence managers managing neighboring wireless networks in a network allocation group of the coexistence enabler; and

when there are insufficient available free resources or not enough advertised allocated but unused resources in the coexistence band for the network allocation group, then analyzing by the coexistence manager resources and resource needs in the coexistence band for the neighboring wireless networks.

2. The method of claim 1, wherein the step of searching further comprises:

when the at least one available free resource is found in the coexistence band, then informing the one or more coexistence managers managing neighboring wireless networks of a new resource usage.

3. The method of claim 1, wherein the step of checking further comprises:

when there are enough allocated but unused resources available, then agreeing with the one or more coexistence managers managing the neighboring wireless networks to reassign one or more of the available allocated but unused resources in the coexistence band to the coexistence enabler.

4. The method of claim 1, wherein the step of analyzing further comprises:

when the resources or the resource needs have not changed substantially, then making by the coexistence manager a reallocation of used resources in the coexistence band for neighboring wireless networks in the network allocation group.

5. The method of claim 4, wherein a substantial change of resources comprises at least one frequency band becoming available or unavailable.

6. The method of claim 4, wherein a substantial change of resource needs comprises an increase or decrease of at least one neighboring network.

7. The method of claim 1, wherein the step of analyzing further comprises:

when the resources or the resource needs have changed, then making by the coexistence manager a reallocation of all available resources in the coexistence band for the neighboring wireless networks.

8. The method of claim 7, wherein the change of resources comprises at least one frequency band becoming available or unavailable.

9. The method of claim 7, wherein the change of resource needs comprises an increase or decrease of at least one neighboring network.

10. The method of claim 1, wherein the step of analyzing further comprises:

when there are no available resources and no reallocatable used resources in the coexistence band for neighboring wireless networks, then indicating by the coexistence manager to the coexistence enabler that the resource request is denied.

11. The method of claim 1, wherein:

when there are reallocatable used resources in the coexistence band for neighboring wireless networks that are in the network allocation group, then agreeing with the one or more coexistence managers managing neighboring wireless networks in the same network allocation group, to reassign one or more of the reallocatable used resources to the coexistence enabler, when the coexistence enabler is eligible for the reallocatable used resources for networks in the same network allocation group.

12. The method of claim 11, wherein:

when there are no available resources and no reallocatable used resources in the coexistence band for neighboring wireless networks, then indicating by the coexistence manager to the coexistence enabler that the resource request is denied.

13. The method of claim 1, wherein:

when there are reallocatable used resources in the coexistence band for neighboring wireless networks that are not in the same network allocation group, then agreeing with all of the coexistence managers managing neighboring wireless networks, to reassign one or more of the reallocatable used resources to the coexistence enabler and communicating with all of the coexistence managers managing neighboring wireless networks, when the coexistence enabler is eligible for the reallocatable used resources of all of the neighboring wireless networks.

14. The method of claim 13, wherein:

when there are no available resources and no reallocatable used resources in the coexistence band for neighboring wireless networks, then indicating by the coexistence manager to the coexistence enabler that the resource request is denied.

15. An apparatus, comprising:

at least one processor;

at least one memory including computer program code;

the at least one memory and the computer program code configured to, with the at least one processor, cause the coexistence manager at least to;

search for at least one available free resource in a wireless network coexistence band by a coexistence manager, in response to a resource request from a coexistence enabler in a wireless network;

when there are insufficient available free resources in the coexistence band, then check by the coexistence manager for availability of allocated but unused resources in the coexistence band, as advertised by one or more coexistence managers managing neighboring wireless networks in a network allocation group of the coexistence enabler; and

when there are insufficient available free resources or not enough advertised allocated but unused resources in the coexistence band for the network allocation group, then analyze by the coexistence manager resources and resource needs in the coexistence band for the neighboring wireless networks.

16. The apparatus of claim 15, wherein the step of searching further comprises:

the at least one memory and the computer program code configured to, with the at least one processor, cause the coexistence manager at least to;

when the at least one available free resource is found in the coexistence band, then inform the one or more coexistence managers managing the neighboring wireless networks of a new resource usage.

17. The apparatus of claim 15, wherein the step of checking further comprises:

the at least one memory and the computer program code configured to, with the at least one processor, cause the coexistence manager at least to;

when there are allocated but unused resources available, then agree with the one or more coexistence managers managing the neighboring wireless networks to reassign one or more of the available allocated but unused resources in the coexistence band to the coexistence enabler.

18. The apparatus of claim 15, wherein the step of analyzing further comprises:

the at least one memory and the computer program code configured to, with the at least one processor, cause the coexistence manager at least to;

when the resources or the resource needs have not changed substantially, then make by the coexistence manager a reallocation of used resources in the coexistence band for the neighboring wireless networks in the network allocation group.

19. The apparatus of claim 18, wherein a substantial change of resources comprises at least one frequency band becoming unavailable.

20. The apparatus of claim 18, wherein a substantial change of resource needs comprises an increase of at least one neighboring network.

21. The apparatus of claim 15, wherein the step of analyzing further comprises:

the at least one memory and the computer program code configured to, with the at least one processor, cause the coexistence manager at least to;

when the resources or the resource needs have changed, then make by the coexistence manager a reallocation of all available resources in the coexistence band for the neighboring wireless networks.

22. The apparatus of claim 21, wherein the change of resources comprises at least one frequency band becoming unavailable.

23. The apparatus of claim 21, wherein the change of resource needs comprises an increase of at least one neighboring network.

24. The apparatus of claim 15, wherein the step of analyzing further comprises:

the at least one memory and the computer program code configured to, with the at least one processor, cause the coexistence manager at least to;

when there are no available resources and no reallocatable used resources in the coexistence band for the neighboring wireless networks, then indicate by the coexistence manager to the coexistence enabler that the resource request is denied.

25. The apparatus of claim 15, wherein:

the at least one memory and the computer program code configured to, with the at least one processor, cause the coexistence manager at least to;

when there are reallocatable used resources in the coexistence band for the neighboring wireless networks that are in the network allocation group, then agree with the one or more coexistence managers managing the neighboring wireless networks in the same network allocation group, to reassign one or more of the reallocatable used resources to the coexistence enabler, when the coexistence enabler is eligible for the reallocatable used resources for networks in the same network allocation group.

26. The apparatus of claim 25, wherein:

the at least one memory and the computer program code configured to, with the at least one processor, cause the coexistence manager at least to;

when there are no available resources and no reallocatable used resources in the coexistence band for the neighboring wireless networks, then indicate by the coexistence manager to the coexistence enabler that the resource request is denied.

27. The apparatus of claim 15, wherein:

the at least one memory and the computer program code configured to, with the at least one processor, cause the coexistence manager at least to;

when there are reallocatable used resources in the coexistence band for the neighboring wireless networks that are not in the same network allocation group, then agree with all of the coexistence managers managing the neighboring wireless networks, to reassign one or more of the reallocatable used resources to the coexistence enabler and communicate with all of the coexistence managers managing the neighboring wireless networks, when the coexistence enabler is eligible for the reallocatable used resources of all of the neighboring wireless networks.

28. The apparatus of claim 27, wherein:

the at least one memory and the computer program code configured to, with the at least one processor, cause the coexistence manager at least to;

when there are no available resources and no reallocatable used resources in the coexistence band for the neighboring wireless networks, then indicate by the coexistence manager to the coexistence enabler that the resource request is denied.

29. The apparatus of claim 15, wherein the coexistence band is in a TV white space frequency band or in another RF spectrum white space band wherein there are no primary user radios operating in the neighboring wireless networks.

30. A non-transitory computer readable medium storing program instructions, which when executed by a computer processor, perform the steps comprising:

searching for at least one available free resource in a wireless network coexistence band by a coexistence manager, in response to a resource request from a coexistence enabler in a wireless network;

when there are insufficient available free resources in the coexistence band, then checking by the coexistence manager for availability of allocated but unused resources in the coexistence band, as advertised by one or more coexistence managers managing neighboring wireless networks in a network allocation group of the coexistence enabler; and

when there are insufficient available free resources or not enough advertised allocated but unused resources in the coexistence band for the network allocation group, then analyzing by the coexistence manager resources and resource needs in the coexistence band for the neighboring wireless networks.