Anti-attack distributed cooperative spectrum sensing method

Abstract

The invention discloses an anti-attack distributed cooperative spectrum sensing method. According to the method, certain cognitive users are likely to become malicious users due to attack during the cooperative spectrum sensing so as to send unsecure sensing data and influence the cooperative sensing performance. At present, the researchers frequently research the typical malicious users in two states, namely, the cognitive users launching "Always Yes" attack and the cognitive users launching "Always No" attack; in allusion to the problem, the method is characterized in that the cognitive users with better detection performance are screened to participate the cooperation, parameters such as signal to noise ratio and sensing matching rate are utilized to define the consensus degree of the cognitive users, the consensus degree is used for representing the differences of different cognitive users in the aspects of detection performance and sensing result security and the original state values, which are iterated and updated, of the cognitive users are weighted so as to reduce the influence on the final cooperative sensing judgement from the cognitive users which are relatively bad in detection performance and unsecure in sensing result and improve the whole sensing performance of the system; and the method has the advantages of effectively resisting attack and improving the spectrum sensing performance of the distributed cooperative sensing.

Description

technical field [0001] The invention relates to an anti-attack distributed cooperative spectrum sensing method, which belongs to the technical field of cognitive radio. Background technique [0002] The demand for spectrum resources in modern wireless communication systems is increasing, and the shortage of spectrum resources has become a restrictive condition for the development of wireless communication technologies. However, through the investigation of the use of spectrum resources, it is found that the spectrum utilization rate of some licensed frequency bands is extremely low, and there are idle phenomena in time and space; on the contrary, some unlicensed frequency bands are overused. Therefore, the shortage of spectrum resources is largely caused by unreasonable spectrum management policies, not because of the lack of physically available spectrum resources. [0003] In view of the existence of the above problems, some scholars proposed a new intelligent wireless co...

AI Technical Summary

Problems solved by technology

The existing distributed cooperative sensing methods usually assume that all cognitive users participate in collaboration by default, and all cognitive users update their status with the same identity, so that the detection performance is poor and the cognitive users who are maliciously attacked and send insecure sensing data will be Has a worse impact on the performance of collaborative awareness

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