Security cooperative spectrum sensing method based on reputation mechanism and dynamic game

Abstract

The invention relates to a security cooperative spectrum sensing method based on a reputation mechanism and a dynamic game. The method combines the credibility transfer process of a secondary user. If the secondary user exceeds the one-hop communication range of a neighbor secondary user, then the neighbor secondary user broadcasts the reputation value previously established by the moving secondary user to a secondary user within the one-hop communication range, so that when the moving secondary user participates in cooperation, the speed of acquiring the reputation value by a cooperative spectrum sensing requester can be accelerated. Thereafter, a dynamic game method is run, and the secondary user is stimulated to participate in cooperation through the utility function of the cooperative spectrum sensing requester and the cooperative spectrum sensing secondary user, and the cooperative spectrum sensing security is improved in combination with the reputation value weight distribution. According to the security cooperative spectrum sensing method based on the reputation mechanism and the dynamic game provided by the invention, the convergence speed of the credibility evaluation of the moving secondary user in a distributed cognitive radio network can be improved, the cooperation fairness can be guaranteed and the collaborators are stimulated to participate in cooperation actively, the SSDF (Spectrum Sensing Data Falsification) attack can be effectively resisted and the spectrum sensing rate can be improved.

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 a reputation mechanism and dynamic gaming. Background technique [0002] Cognitive radio network (CRN) is proposed mainly to relieve more communication equipment's tight use of spectrum resources, and at the same time to overcome the low utilization rate of spectrum resources caused by fixed spectrum allocation. When the authorized user or primary user (Primary user, PU) does not use the authorized frequency band, and the secondary user (SU) knows that the status of the frequency band is idle through the sensing operation, it can share the frequency band and sense in real time, as long as the primary user appears Then automatically give up the frequency band. Therefore, spectrum sensing is a key technology for cognitive wireless networks. [0003] Studies have shown that cooperative spectrum sensing can effec...

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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