Collaboration detection method among cognitive users based on evolutionary game theory under noise uncertainty
A technology that recognizes users and game theory, and is applied in transmission monitoring, electrical components, transmission systems, etc., and can solve problems such as reduced benefits
Active Publication Date: 2020-07-07
NANJING UNIV OF POSTS & TELECOMM
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That is to say, if it changes its strategy at this time, its benefit will be reduced
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[0049] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
[0050] The evolutionary game combines the dynamic evolution process and game theory analysis, emphasizing the dynamic equilibrium of individual CR users' collaborative detection costs and benefits, and the overall performance of the system. It does not require CR users to be completely rational, nor does it require them to have complete information. In the network dynamic and complex environment, CR user spectrum sensing cooperates with individual behaviors and improves system performance at the same time.
[0051] First, we regard all cognitive users as a whole to participate in the game. Through the evolutionary game theory algorithm, we can obtain the average throughput of the cooperative cognitive users and the average throughput of all cognitive users, and compare the two average throughputs. If they are equal, the final evolutionary stable st...
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The present invention discloses a cooperative detection between cognitive users based on the evolution game theory in the condition of noise power uncertainty. The method employs the evolution game theory algorithm to allow cognitive users to dynamically select whether to participate in the cooperative detection or not, and realizes an evolutionarily stable strategy (ESS) through continuous iterative learning. The method comprises: all the cognitive users are regarded as a whole body to participate in the game to obtain the average throughout of the cognitive users participating in the cooperation and the average throughout of all the cognitive users through the evolution game theory algorithm, and the two average throughouts are compared, and if the average throughout of the cognitive users participating in the cooperation is the same as the average throughout of all the cognitive users, a final evolutionarily stable strategy is obtained. If the average throughout of the cognitive users participating in the cooperation is not the same as the average throughout of all the cognitive users, their new average throughouts are obtained through the iterative formulas until the average throughout of the cognitive users participating in the cooperation is the same as the average throughout of all the cognitive users. Through the dynamic learning algorithm, the cooperative detection between cognitive users based on the evolution game theory in the condition of noise power uncertainty allows the cognitive users to selectively participate in the cooperation so as to greatly reduce the detection power consumption and improve the whole user throughput and the detection performances of the system.
Description
technical field [0001] The invention relates to the technical field of radio communication, in particular to a cooperative detection method among cognitive users based on evolutionary game theory under noise uncertainty. Background technique [0002] Cognitive radio (CR), as an intelligent radio technology, was proposed at the end of the 20th century to promote the effective use of spectrum resources. CR technology realizes Dynamic Spectrum Access (DSA) instead of Static Spectrum Access (SCA), makes reasonable use of spectrum resources, and alleviates the shortage of spectrum resources. [0003] Due to the good development prospect of cognitive radio technology, CR technology has already appeared in some devices. For example, cognitive techniques have been used in both WLAN devices and Code Division Multiple Access (CDMA) networks to use spectrum more efficiently. Management departments, standardization protocol groups, colleges and universities, and communication industry...
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IPC IPC(8): H04B17/382
CPCH04B17/382
Inventor 岳文静沈冬冬陈志魏怡
Owner NANJING UNIV OF POSTS & TELECOMM