基于信任节点辅助的安全协同频谱感知策略  

Secure Cooperative Spectrum Sensing based on Trusted Nodes Assistance

作　　者：曾昆[1] 彭启航[2] 唐友喜[1] 

机构地区：[1]电子科技大学通信抗干扰技术国家级重点实验室,四川成都611731 [2]电子科技大学通信与信息工程学院,四川成都611731

出　　处：《信号处理》2011年第4期486-490,共5页Journal of Signal Processing

基　　金：国家自然科学基金(60832007;60902027;60572090);国家重大科技专项(2009ZX03003-008-01)

摘　　要：在认知无线电网络中,多个用户相互协作进行频谱感知能有效地提高系统感知性能。然而这种协同方式也带来了新的安全隐患:当恶意用户出现时,现有协同感知方法无法确保感知结果的鲁棒性。本文针对这一问题,提出了一种基于信任节点辅助的安全协同感知策略。该策略通过借助网络中信任节点的感知结果,在用户域和时间域两个维度上消除恶意用户的影响,确保了算法在较多恶意用户环境中的稳定性。仿真结果表明,新算法的性能优于Kaligineedi所提算法,在恶意用户数目为网络用户总数一半时,仍能有效地进行协同感知,具有良好的鲁棒性。Cooperation among multiple cognitive users provides an improvement for primary user detection.However,this paradigm also poses new security vulnerabilities in cognitive radio system.Specifically,malicious users falsify sensing data can decrease cooperative sensing performance.In this paper,we propose a secure cooperative sensing scheme to resist malicious user attack.The proposed scheme is performed in both user-wise and time-wise detections with trusted nodes assistance,where the stability of the scheme in the context of several malicious users is guaranteed.Simulations show that the performance of our scheme outcomes the one proposed by Kaligineedi.The proposed scheme can work effectively in the scenario where a half of the users are malicious.

关 键 词：认知无线电 频谱感知 协同 恶意用户 信任节点辅助 

分 类 号：TN92[电子电信—通信与信息系统]