Soft Reputation-Based Secure Cooperative Spectrum Sensing
Cognitive Radios (CRs) sense the radio spectrum environment dynamically and automatically in order to find underutilized spectrum and then exploit it intelligently. In face of the challenging propagation environments characterized by shadowing and fading effects, cooperative spectrum sensing (CSS) has been proposed to perform reliable spectrum sensing by taking advantage of the spatial diversity in multi-user Cognitive radio networks. In CSS, each secondary user sends its sensing data to the combining node, which makes a decision on the presence of the primary signal. However, CSS are typically very vulnerable to attacks where malicious CRs falsify sensing data. To identify misbehaved CRs and alleviate their adverse effects on CSS performance, a secure CSS scheme based on soft reputation has been proposed in this letter. Contrary to existing reputationbased secure CSS schemes, where reputation of CRs is assigned artificially, reputation of CRs is calculated utilizing the statistics of primary band occupancy. Simulation demonstrates the effectiveness of the proposed scheme.
Cognitive Radio Cooperative Spectrum Sensing Security
De Du
School of Information and Control Engineering Weifang University Weifang, 261061, Shandong Province, China
国际会议
杭州
英文
463-467
2012-03-23（万方平台首次上网日期，不代表论文的发表时间）