基于联合信任机制的CRN安全频谱感知策略

Security spectrum perception strategy in CR networks based on joint trust mechanism

针对认知无线电网络(CRN)中不可信节点严重影响协作频谱感知性能的问题,提出一种基于联合信任机制的CRN安全协作策略。将网络分为主用户(PU)子网络和二级用户(SU)子网络。当一个SU请求频谱共享时,SU网络基站命令其它SU节点根据之前的协作交互为该SU节点给出一个信任值。PU网络基站也命令各PU为该SU给出一个信任值;计算该SU的联合信任值,与设定的阈值进行比较,识剐不可信SU节点。实验结果表明,该方案能够准确识别不可信节点,有效降低了协作感知的虚警率。

For the issue that the non-trusted nodes seriously affect the performance of cooperative spectrum sensing problem in cognitive radio networks（CRN）,a kind of CRN security cooperation strategy based on joint trust mechanism was proposed.The network was divided into primary user（PU） sub network and secondary user（SU） sub network.When a SU requested for spectrum sharing,the SU network base station commanded other SU nodes to give a trust value according to the interaction with this SU node,and the PU network base station also commanded PU nodes to give a trust value.The joint trust value of this SU was calculated and compared with the threshold to identify non-trusted SU node.Experimental results show that the proposed scheme can accurately identify non-trusted nodes,and effectively reduce the false alarm rate of collaborative perception.