Reputation-Based Cooperative Spectrum Sensing with Trusted Nodes Assistance精选.pdfVIP

226 IEEE COMMUNICATIONS LETTERS, VOL. 14, NO. 3, MARCH 2010 Reputation-Based Cooperative Spectrum Sensing with Trusted Nodes Assistance 藝 Kun Zeng, Przemys艂aw Pawe艂czak, and Danijela Cabri麓c Abstract鈥擡xisting cooperative spectrum sensing (CSS) the trusted threshold are reliable, and their sensing results are schemes are typically vulnerable to attacks where misbehaved then incorporated in CSS. Simulation results further verify cognitive radios (CRs) falsify sensing data. To ensure the the effectiveness of the proposed scheme. That is, the scheme robustness of spectrum sensing, this letter presents a secure CSS scheme by introducing a reputation-based mechanism to works well even when there is a large number of misbehaviors, identify misbehaviors and mitigate their harmful effect on sensing while the existing schemes [4], [5], [6] do not perform performance. Encouraged by the fact that such secure CSS is satisfactorily under such circumstances. sensitive to the correctness of reputations, we further present a The remainder of this paper is organized as follows. Sec- trusted node assistance scheme. This scheme starts with reliable tion II presents the system model, while Section III intro- CRs. Sensing information from other CRs are incorporated into cooperative sensing only when their reputation is veri铿乪d, which duces the proposed reputation-based CSS schemes wit