Spectrum coordination controller

• US 8,040,815 B2
• Filed: 11/28/2007
• Issued: 10/18/2011
• Est. Priority Date: 11/28/2007
• Status: Active Grant

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola Solutions, Inc.
• Inventors: Economy, George R., Silk, S. David
• Primary Examiner(s): Pham; Chi H.
• Assistant Examiner(s): HOM, SHICK C
• Application Number:
  US11/946,247
• Publication Number:
  US 20090135767A1
• Time in Patent Office: 1,420 Days
• Field of Search: None
• US Class Current: 370/252
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks

Abstract

A method, wireless controller, and information processing system that define communication channel allocation. Communication channel allocation commands associated with a first network are monitored (102). The first network (102) comprises a plurality of communication frequencies assigned by the communication channel allocation commands. A set of communication frequencies are determined that have been assigned to wireless devices (108) associated with the first network (102) in response to the monitoring. A specification of unused communication frequencies within the plurality of communication frequencies are transmitted to a second network (104) in response to the determining.

Claims

1. A method for controlling wireless communication channel allocation between two wireless networks, the method comprising:

monitoring communication channel allocation commands issued by a first wireless network, wherein the first wireless network comprises a plurality of communication frequencies;

determining from the communication channel allocation commands a set of communication frequencies that have been assigned from the plurality of communication frequencies to wireless devices associated with the first wireless network, and from at least the set of assigned communication frequencies, determining unused communication frequencies within the plurality of communication frequencies; and

transmitting, in response to the determining, to at least one second wireless network, a specification of the unused communication frequencies within the plurality of communication frequencies.

2. The method of claim 1, wherein the communication channel commands are communicated among at least some components of the first wireless network via a wired link.

3. The method of claim 1, further comprising:

accepting a message from at least one second wireless network comprising a specification of communication frequencies from the plurality of communication frequencies that are not to be used by the first wireless network; and

transmitting the specification of communication frequencies that are not to be used by the first wireless network to the first wireless network.

4. The method of claim 1, wherein the at least one second wireless network accepts the specification of unused communication frequencies and assigns at least one of the unused communication frequencies to at least one wireless device associated with the at least one second wireless network.

5. The method of claim 1, wherein at least one wireless communication controller associated with the at least one second wireless network accepts the specification of unused communication frequencies and designates at least one unused communication channel as a wirelessly exchanging control channel for the at least one second wireless network.

6. The method of claim 1, further comprising:

determining from the communication channel allocation commands that the first wireless network has allocated a communication channel within the specification of unused communication frequencies; and

notifying the at least one second wireless network of an unavailability of the communication channel allocated within the specification of the unused communication frequencies.

7. The method of claim 6, further comprising:

determining by the at least one second wireless network in response to the notifying, that the communication channel allocated within the specification of the unused communication frequencies is assigned by the first wireless network; and

de-allocating by the at least one second wireless network, in response to the determining, the communication channel allocated within the specification of the unused communication frequencies assigned by the first wireless network.

8. The method of claim 1, further comprising:

receiving, in response to the transmitting, a request from the at least one second wireless network, to reserve at least one communication channel in the plurality of communication frequencies; and

instructing, in response to the receiving, the first wireless network to reserve the at least one communication channel.

9. A wireless communication controller comprising:

a channel assignment monitor adapted to monitor communication channel allocation commands issued by a first wireless network, wherein the first wireless network comprises a plurality of communication frequencies;

a channel assignment tracker, communicatively coupled to the channel assignment monitor, adapted to determine from the communication channel allocation commands monitored by the channel assignment monitor, a set of communication frequencies that have been assigned from the plurality of communication frequencies to wireless devices associated with the first wireless network, and from at least the set of assigned communication frequencies, adapted to determine unused communication frequencies within the plurality of communication frequencies; and

a channel availability transmitter communicatively coupled to the channel assignment tracker, adapted to transmit, in response to determinations by the channel assignment tracker, to at least one second wireless network, a specification of the unused communication frequencies within the plurality of communication frequencies.

10. The wireless communications controller of claim 9, wherein the communication channel allocation commands are communicated among at least some components of the first wireless network via a wired link, and wherein the channel assignment monitor is adapted to monitor the wired link.

11. The wireless communications controller of claim 9, further comprising:

a second channel assignment monitor, communicatively coupled to the channel assignment tracker, adapted to accept a message from at least one second wireless network comprising a specification of communication frequencies from the plurality of communication frequencies that are not to be used by the first wireless network; and

a second channel availability transmitter, communicatively coupled to the second channel assignment monitor, adapted to transmit the specification of communication frequencies that are not to be used by the first wireless network to the first wireless network.

12. The wireless communications controller of claim 9, wherein the at least one second wireless network accepts the specification of unused communication frequencies and assigns at least one of the unused communication frequencies to at least one wireless device associated with the at least one second wireless network.

13. The wireless communications controller of claim 9, wherein at least one wireless communication controller associated with the at least one second wireless network accepts the specification of unused communication frequencies and designates at least one unused communication channel as a wirelessly exchanging control channel for the at least one second wireless network.

14. The wireless communications controller of claim 9,

wherein the channel assignment tracker is further adapted to determine from the communication channel allocation commands monitored by the channel assignment monitor, that the first wireless network has allocated a communication channel within the specification of the unused communication frequencies, and

wherein the channel availability transmitter is further adapted to notify the at least one second wireless network of an unavailability of the communication channel allocated within the specification of the unused communication frequencies.

15. The wireless communications controller of claim 9, further comprising:

a second channel assignment monitor, communicatively coupled to the channel assignment tracker, adapted to receive, a request from the at least one second wireless network, to reserve at least one communication channel in the plurality of communication frequencies; and

a second channel availability transmitter, communicatively coupled to the second channel assignment monitor and the channel assignment tracker, adapted to instructing the first wireless network to reserve the least one communication channel.

16. An information processing system comprising:

network adapter hardware;

a processing unit comprising a processor communicatively coupled to a memory, the processing unit communicatively coupled to the network adapter hardware, wherein the processing unit is

adapted to monitor communication channel allocation commands issued by a first wireless network, wherein the first wireless network comprises a plurality of communication frequencies,

adapted to determine from the communication channel allocation commands a set of communication frequencies that have been assigned from the plurality of communication frequencies to wireless devices associated with the first wireless network, and from at least the set of assigned communication frequencies, adapted to determine unused communication frequencies within the plurality of communication frequencies, and

adapted to transmit, in response to the determinations, to at least one second wireless network, a specification of the unused communication frequencies within the plurality of communication frequencies.

17. The information processing system of claim 16, wherein the communication channel commands are communicated among at least some components of the first wireless network via a wired link, and wherein the processing unit is adapted to monitor the wired link.

18. The information processing system of claim 16, wherein the processing unit is further

adapted to accept a message from at least one second wireless network comprising a specification of communication frequencies from the plurality of communication frequencies that are not to be used by the first wireless network and

adapted to transmit the specification of communication frequencies that are not to be used by the first wireless network to the first wireless network.

19. The information processing system of claim 16, wherein the processing unit is further

adapted to determine from the communication channel allocation commands that the first wireless network has allocated a communication channel within the specification of the unused communication frequencies;

and

adapted to notify the at least one second wireless network of an unavailability of the communication channel allocated within the specification of the unused communication frequencies.

20. The information processing system of claim 16, wherein the processing unit is further

adapted to receive, a request from the at least one second wireless network, to reserve at least one communication channel in the plurality of communication frequencies and

adapted to instruct the first wireless network to reserve the at least one communication channel.