Optimizing dynamic spectrum access

• US 9,215,598 B2
• Filed: 11/10/2011
• Issued: 12/15/2015
• Est. Priority Date: 11/10/2011
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Vuyyuru, Rama K., Chen, Si
• Primary Examiner(s): Safaipour, Bobbak
• Assistant Examiner(s): Talukder, Md
• Application Number:
  US13/294,084
• Publication Number:
  US 20130122819A1
• Time in Patent Office: 1,496 Days
• Field of Search: 455/62, 455/456.1, 455/456.3, 455/67.11, 455/509
• US Class Current: 1/1
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/563 of the wireless resources

Abstract

A system and method for optimizing spectrum access in data communications is disclosed. The system comprises a case module, a selection engine, an evaluation module and an update module. The case module determines a present case based at least in part on sensor data and environmental data, determines a matching case for the present case and configures one or more channel profiles for the present case based at least in part on the matching case. The selection engine selects a first channel based on the one or more channel profiles. The first channel is associated with a first channel profile from the one or more channel profiles. The evaluation module evaluates a first channel performance for the first channel and generates a first channel reward for the first channel. The update module updates the first channel profile based at least in part on the first channel reward.

Claims

1. A method for optimizing dynamic spectrum access in communications, the method comprising:

storing case data in a cognition database describing historic cases reflecting historic optimized solutions for spectrum access in specific communication environments based on past experiences;

determining a present case based at least in part on sensor data and environmental data, the present case describing a current communication environment;

determining distances between the present case and the historic cases based on one or more distance measurement factors, each distance describing a parameter characterizing a similarity between the present case and a corresponding historic case;

selecting, as a matching case, a historic case from the historic cases stored in the cognition database using the distance of the historic case to the present case, the matching case being optimized for spectrum access in a communication environment similar to the current communication environment based on a past experience;

retrieving one or more channel profiles associated with the matching case from the cognition database;

configuring case data including one or more channel profiles for the present case based at least in part on the one or more channel profiles associated with the matching case; and

storing configured case data including the one or more channel profiles for the present case in the cognition database as a new historic case for future use.

2. The method of claim 1, further comprising:

selecting a first channel based at least in part on the one or more channel profiles, the first channel associated with a first channel profile from the one or more channel profiles;

evaluating a first channel performance for the first channel and generating a first channel reward for the first channel; and

updating the first channel profile based at least in part on the first channel reward.

3. The method of claim 2, wherein generating the first channel reward further comprises:

predicting a channel opportunity for the first channel;

determining a channel throughput for the first channel; and

generating the first channel reward based at least in part on the channel opportunity and the channel throughput.

4. The method of claim 2, further comprising:

selecting a second channel based at least in part on the updated first channel profile and other remaining channel profiles from the one or more channel profiles, the second channel associated with a second channel profile from the one or more channel profiles;

evaluating a second channel performance for the second channel and generating a second channel reward for the second channel; and

updating the second channel profile based at least in part on the second channel reward.

5. The method of claim 2, wherein the first channel profile includes a channel value, a channel index and a channel visit number.

6. The method of claim 5, wherein updating the first channel profile further comprises:

updating the channel value, the channel index and the channel visit number for the first channel.

7. The method of claim 2, wherein selecting the first channel based at least in part on the one or more channel profiles further comprises:

selecting a channel that has a maximal channel value.

8. The method of claim 2, wherein selecting the first channel based at least in part on the one or more channel profiles further comprises:

selecting a channel that has a maximal channel index.

9. The method of claim 1, wherein the current communication environment is characterized by one or more of traffic conditions at a location associated with the present case, channel usage characteristics for one or more data communication channels available at the location, terrain characteristics at the location, and radio propagation characteristics at the location.

10. The method of claim 1, wherein selecting, as the matching case, the historic case from the historic cases stored in the cognition database using the distance of the historic case to the present case further comprises:

selecting a historic case from the historic cases that has a minimal distance to the present case.

11. The method of claim 1, wherein the one or more distance measurement factors are defined by an administrator and include a location, a time, terrain characteristics, whitespace spectrum distribution, and government regulations.

12. A system for optimizing dynamic spectrum access in communications, the system comprising:

a case module

storing case data in a cognition database describing historic cases reflecting historic optimized solutions for spectrum access in specific communication environments based on past experiences,

determining a present case based at least in part on sensor data and environmental data, the present case describing a current communication environment,

determining distances between the present case and the historic cases based on one or more distance measurement factors, each distance describing a parameter characterizing a similarity between the present case and a corresponding historic case,

selecting, as a matching case, a historic case from the historic cases stored in the cognition database using the distance of the historic case to the present case, the matching case being optimized for spectrum access in a communication environment similar to the current communication environment based on a past experience,

retrieving one or more channel profiles associated with the matching case from the cognition database, and

configuring case data including one or more channel profiles for the present case based at least in part on the one or more channel profiles associated with the matching case; and

an update module communicatively coupled to the case module, the update module storing configured case data including the one or more channel profiles for the present case in the cognition database as a new historic case for future use.

13. The system of claim 12, further comprising:

a selection engine communicatively coupled to the case module, the selection engine selecting a first channel based at least in part on the one or more channel profiles, the first channel associated with a first channel profile from the one or more channel profiles; and

an evaluation module communicatively coupled to the case module and the selection engine, the evaluation module evaluating a first channel performance for the first channel and generating a first channel reward for the first channel, wherein

the update module is communicatively coupled to the case module, the selection engine, and the evaluation module, and is further configured to update the first channel profile based at least in part on the first channel reward.

14. The system of claim 13, wherein the evaluation module is further configured to:

predict a channel opportunity for the first channel;

determine a channel throughput for the first channel; and

generate the first channel reward based at least in part on the channel opportunity and the channel throughput.

15. The system of claim 13, wherein the selection engine is further configured to select a second channel based at least in part on the updated first channel profile and other remaining channel profiles from the one or more channel profiles, the evaluation module is further configured to evaluate a second channel performance for the second channel and generate a second channel reward for the second channel, and the update module is further configured to update a second channel profile based at least in part on the second channel reward, wherein the second channel is associated with the second channel profile from the one or more channel profiles.

16. The system of claim 13, wherein the first channel profile includes a channel value, a channel index, and a channel visit number.

17. The system of claim 16, wherein the update module is further configured to:

update the channel value, the channel index and the channel visit number for the first channel.

18. The system of claim 13, wherein to select the first channel based at least in part on the one or more channel profiles, the selection engine is further configured to:

select a channel that has a maximal channel value.

19. The system of claim 13, wherein to select the first channel based at least in part on the one or more channel profiles, the selection engine is further configured to:

select a channel that has a maximal channel index.

20. The system of claim 12, wherein the current communication environment is characterized by one or more of traffic conditions at a location associated with the present case, channel usage characteristics for one or more data communication channels available at the location, terrain characteristics at the location, and radio propagation characteristics at the location.

21. The system of claim 12, wherein to select, as the matching case, the historic case from the historic cases stored in the cognition database using the distance of the historic case to the present case further comprises:

selecting a historic case from the historic cases that has a minimal distance to the present case.

22. The system of claim 12, wherein the one or more distance measurement factors are defined by an administrator and include a location, a time, terrain characteristics, whitespace spectrum distribution, and government regulations.

23. A computer program product comprising a non-transitory computer readable medium encoding instructions that, in response to execution by a computing device, cause the computing device to perform operations comprising:

storing case data in a cognition database describing historic cases reflecting historic optimized solutions for spectrum access in specific communication environments based on past experiences;

determining a present case based at least in part on sensor data and environmental data, the present case describing a current communication environment;

determining distances between the present case and the historic cases based on one or more distance measurement factors, each distance describing a parameter characterizing a similarity between the present case and a corresponding historic case;

selecting, as a matching case, a historic case from the historic cases stored in the cognition database using the distance of the historic case to the present case, the matching case being optimized for spectrum access in a communication environment similar to the current communication environment based on a past experience;

retrieving one or more channel profiles associated with the matching case from the cognition database;

configuring case data including one or more channel profiles for the present case based at least in part on the one or more channel profiles associated with the matching case; and

storing configured case data including the one or more channel profiles for the present case in the cognition database as a new historic case for future use.

24. The computer program product of claim 23, wherein the instructions cause the computing device to perform operations further comprising:

selecting a first channel based at least in part on the one or more channel profiles, the first channel associated with a first channel profile from the one or more channel profiles;

evaluating a first channel performance for the first channel and generating a first channel reward for the first channel; and

updating the first channel profile based at least in part on the first channel reward.

25. The computer program product of claim 24, wherein generating the first channel reward further comprises:

predicting a channel opportunity for the first channel;

determining a channel throughput for the first channel; and

generating the first channel reward based at least in part on the channel opportunity and the channel throughput.

26. The computer program product of claim 24, wherein the instructions cause the computing device to perform operations further comprising:

selecting a second channel based at least in part on the updated first channel profile and other remaining channel profiles from the one or more channel profiles, the second channel associated with a second channel profile from the one or more channel profiles;

evaluating a second channel performance for the second channel and generating a second channel reward for the second channel; and

updating the second channel profile based at least in part on the second channel reward.

27. The computer program product of claim 24, wherein the first channel profile includes a channel value, a channel index and a channel visit number.

28. The computer program product of claim 23, wherein selecting, as the matching case, the historic case from the historic cases stored in the cognition database using the distance of the historic case to the present case further comprises:

selecting a historic case from the historic cases that has a minimal distance to the present case.

29. The computer program product of claim 23, wherein the current communication environment is characterized by one or more of traffic conditions at a location associated with the present case, channel usage characteristics for one or more data communication channels available at the location, terrain characteristics at the location, and radio propagation characteristics at the location.

30. The computer program product of claim 23, wherein the one or more distance measurement factors are defined by an administrator and include a location, a time, terrain characteristics, whitespace spectrum distribution, and government regulations.