协作频谱感知中的动态信任评估机制

doi:10.11959/j.issn.1000-0801.2016051

Abstract

Abstract:

Considering the harmful effect of dynamic SSDF attack against cooperative spectrum sensing technologies，a dynamic trust evaluation scheme based on the real-time observation and analysis of cognitive users’ sensing behaviors was proposed.Time attenuation，additive reward and additive penalty factors based on the historical sensing variation of cognitive users were introduced to calculate the dynamic trust value which changes with time and the number of collaborations.Meanwhile，trusted cognitive users were selected to participate in cooperative sensing，and thus improving the accuracy of the final sensing decision.Simulation results show that the scheme can effectively suppress the growth of trust of malicious users，and reduce the attack success rate for“OR”，“AND”and“Majority”which are three kinds of cooperative spectrum sensing data fusion schemes.

Key words: cognitive radio, cooperative spectrum sensing, dynamic trust, SSDF attack

Meiying WANG,Jingyu FENG,Guangyue LU,Dingkun HAN. A dynamic trust evaluation scheme for cooperative spectrum sensing[J]. Telecommunications Science, 2016, 32(3): 60-67.

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参数	描述	缺省值
N	认知用户总数	60
P	主用户总数	5
cycle	循环仿真次数	200
mp	恶意用户比例	0～90%
θ	信任门限值	0.5

A dynamic trust evaluation scheme for cooperative spectrum sensing

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