COGNITIVE RADIO SYSTEM, RESOURCE ALLOCATION APPARATUS THEREOF AND METHOD THEREFOR

• US 20160352547A1
• Filed: 08/12/2016
• Published: 12/01/2016
• Est. Priority Date: 05/28/2012
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: GUO, XIN
• Granted Patent: US 9,973,359 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 27/0006 Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio for spectrum sharing between different networks H04W16/14
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0219 where the power saving management affects multiple terminals
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Disclosed is a cognitive radio system, resource allocation apparatus thereof and method therefor. A resource allocation apparatus comprises: a transmission opportunity assessment device which is used to assess availabilities of transmission opportunities in radio resources of a primary communication system; a vector production device which is used to set a transmission opportunity selection vector for each secondary user in the cognitive radio system based on assessment results of the availabilities of transmission opportunities, wherein the transmission opportunity selection vector includes information for identifying multiple transmission opportunities assessed available; and a sending device which is used to distribute the transmission opportunity selection vector to the secondary user.

Claims

1. (canceled)

2. An electronic device in a wireless communication system, comprising:

processing circuitry configured to;

evaluate an availability of transmission opportunities in wireless resources;

identify a plurality of available transmission opportunities according to a result of the evaluation; and

rank the plurality of available transmission opportunities for at least one user.

3. The electronic device of claim 2, wherein the processing circuitry further configured to transmit a result of the ranking to the at least one user.

4. The electronic device of claim 3, wherein the processing circuitry is configured to rank the plurality of available transmission opportunities to identify a transmission priority of each of the plurality of available transmission opportunities for the at least one user so that the higher the transmission priority is, the higher a rank of an available transmission opportunity corresponding to the transmission priority is, and the more likely the at least one user uses the corresponding available transmission opportunity for transmission.

5. The electronic device of claim 4, wherein the processing circuitry is configured to rank the plurality of available transmission opportunities in a form of a transmission opportunities selection vector by arranging the plurality of available transmission opportunities in an order based on values of the plurality of available transmission opportunities.

6. The electronic device of claim 5, wherein

the processing circuitry is configured to set a transmission opportunities selection vectors set for a plurality of users,

the transmission opportunities selection vectors set comprises a plurality of transmission opportunities selection vectors,

each of the transmission opportunities selection vector is for each user, and

the plurality of available transmission opportunities at the same corresponding positions of the plurality of transmission opportunities selection vectors set for different users are different from each other.

7. The electronic device of claim 2, wherein the processing circuitry is further configured to rank the plurality of available transmission opportunities for a plurality of users, and

transmission priorities of each of the plurality of available transmission opportunities for different users are different.

8. The electronic device of claim 2, wherein the processing circuitry is further configured to acquire usage information of the wireless resources to evaluate availability of the transmission opportunities.

9. The electronic device of claim 2, wherein availability time of the wireless resources is acquired evaluate availability of the transmission opportunities, and the availability time by calculating contiguous idle time duration statistic of a frequency band in which the transmission opportunity is located within a past predetermined time period, and

the contiguous idle time duration statistic comprises one or more of the following parameters:

an average time length of contiguous idle time durations of the frequency band in which the transmission opportunity is located within the time period;

a time length of a contiguous idle time duration which occurs most frequently of the frequency band in which the transmission opportunity is located within the time period;

a time length of a contiguous idle time duration in which a corresponding time point is located of the frequency band in which the transmission opportunity is located within the time period; and

number of accumulated contiguous idle time durations of the frequency band in which the transmission opportunity is located within the time period.

10. The electronic device of claim 2, wherein

the processing circuitry is further configured to evaluate, for each user, availability of a transmission opportunity to be evaluated by calculating a transmission result estimator of the user on a frequency band corresponding to the transmission opportunity, and

the processing circuitry is configured to calculate number of times of data transmission successes of the user on the frequency band corresponding to the transmission opportunity within a predetermined time period prior to current time point or a ratio of the number of times of the data transmission successes to a total number of times that the secondary user attempts to perform data transmission on the frequency band corresponding to the transmission opportunity, as the transmission result estimator of the transmission opportunity.

11. An electronic device in a wireless communication system, comprising:

processing circuitry configured to;

receive rank information of a plurality available transmission opportunities for data transmission of the electronic device, the rank information comprising data transmission priorities of the plurality of available transmission opportunities for the electronic device; and

sense at least one of the plurality of available transmission opportunities based on the rank information, to judge whether the at least one of the plurality of available transmission opportunities is currently available, and to determine that the at least one of the plurality of available transmission opportunities is available for data transmission if the sensed available transmission opportunity is currently available.

12. The electronic device of claim 11, wherein

the processing circuitry is further configured to:

sense a transmission opportunity that has been evaluated as available corresponding to a largest availability value among the plurality of transmission opportunities that have been evaluated as available in the transmission opportunity selection vector to judge whether the transmission opportunity that has been evaluated as available corresponding to the largest availability value is currently available, and if yes, to determine that the transmission opportunity that has been evaluated as available corresponding to the largest availability value is currently available for data transmission, otherwise, to sequentially sense a next transmission opportunity that has been evaluated as available in the transmission opportunity selection vector, until a currently available transmission opportunity is found or until there is no selectable transmission opportunity that has been evaluated as available in the transmission opportunity selection vector.

13. The electronic device of claim 11, further comprising:

a transmitting device configured to feedback transmission result information regarding data transmission by using the transmission opportunity.

14. The electronic device of claim 13, wherein the transmission result information comprises a transmission result vector and/or a transmission result value, the transmission result vector comprises information indicating whether each of transmission opportunities in the transmission opportunity selection vector is available for a user and/or whether data transmission is successful, and the transmission result value indicates a position of the transmission opportunity used by the user in the transmission opportunity selection vector.

15. A wireless communication method comprising:

evaluating, an availability of transmission opportunities in wireless resources;

identifying a plurality of available transmission opportunities according to a result of the evaluation;

ranking the plurality of available transmission opportunities; and

transmitting a result of the ranking to at least one user.

16. A wireless communication method comprising:

receiving rank information of a plurality available transmission opportunities for data transmission of an electronic device in a wireless communication system, the rank information comprising data transmission priorities of the plurality of available transmission opportunities for the electronic device; and

sensing each available transmission opportunity based on the rank information, to judge whether the available transmission opportunity is currently available, and to determine that the available transmission opportunity is available for data transmission if the available transmission opportunity is currently available.

17. The wireless communication method of claim 16, further comprising:

sensing a transmission opportunity that has been evaluated as available corresponding to a largest availability value among the plurality of transmission opportunities that have been evaluated as available based on the rank information to judge whether the transmission opportunity that has been evaluated as available corresponding to the largest availability value is currently available, and if yes, selecting the transmission opportunity that has been evaluated as available corresponding to the largest availability value for data transmission, otherwise, sequentially sensing a next transmission opportunity that has been evaluated as available in the transmission opportunity selection vector, until an available transmission opportunity is found or until there is no selectable transmission opportunity that has been evaluated as available in the transmission opportunity selection vector.

18. The wireless communication method of claim 16, further comprising:

feeding back transmission result information regarding data transmission by using the transmission opportunity.

19. The wireless communication method of claim 18, wherein

the transmission result information comprises a transmission result vector and/or a transmission result value,

the transmission result vector comprises information indicating whether the transmission opportunities in the transmission opportunity selection vector are available for the user and/or whether data transmission is successful, and

the transmission result value indicates a position of the transmission opportunity used by the user in the transmission opportunity selection vector.