A Secure Collaborative Spectrum Sensing Method Based on Reputation Mechanism and Dynamic Game

Abstract

The present invention relates to a secure collaborative spectrum sensing method based on reputation mechanism and dynamic game. The method combines the reputation transfer process of secondary users. If a secondary user exceeds the one-hop communication range of a neighboring secondary user, the neighboring secondary user will move. The reputation value previously established by the secondary user is broadcast to the secondary users within its one-hop communication range, which speeds up the speed at which the reputation value is obtained by the cooperative spectrum sensing requester when the mobile secondary user participates in cooperation. Then run the dynamic game method, through the utility function of the cooperative spectrum sensing requester and the cooperative spectrum sensing secondary user, so as to encourage the secondary users to participate in the cooperation, and combine the reputation value weight distribution to improve the security of the collaborative spectrum sensing. The invention improves the convergence speed of mobile secondary user reputation evaluation in the distributed cognitive wireless network, ensures the fairness of cooperation and encourages collaborators to actively participate in cooperation, can effectively resist SSDF attacks, and simultaneously improves the frequency spectrum detection rate.

Description

technical field [0001] The invention relates to the security field of wireless communication technology, in particular to a safe cooperative spectrum sensing method based on reputation mechanism and dynamic game. Background technique [0002] Cognitive radio network (CRN) is proposed mainly to alleviate the shortage of spectrum resources used by more communication devices, and to overcome the low utilization of spectrum resources caused by fixed spectrum allocation. When the authorized user or the primary user (PU) does not use the authorized frequency band, and the secondary user (SU) knows that the frequency band is idle through the sensing operation, it can share the frequency band and sense it in real time, as long as the primary user appears The frequency band will be given up automatically. Therefore, spectrum sensing is a key technology for cognitive wireless networks. [0003] The research shows that cooperative spectrum sensing can effectively solve the problem th...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned existing solutions still have the following problems: the reputation value of the collaborators cannot be converged in time in the collaborative sensing; the cooperative secondary users cannot be encouraged to give real report information; the accuracy and Lack of security considerations

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