Robust reputation management mechanism in cooperative spectrum sensing

Cooperative spectrum sensing (CSS) is the key function of cognitive radio system to identify the available spectrum. However, cooperative paradigms are prone to be threatened by Byzantine attack, and the effect of extensive Byzantine mitigation methods adopting the global decision (GD) as the reputation management mechanism (RMM) is not satisfactory in some instance. In this Letter, according to the delivery of the transmitted data, the authors propose a data transmission status (DTS) in CSS, which is easily implemented without unrealistic assumptions about Byzantine attack. Compared with the GD, simulation results show that the DTS is a robust RMM and provides better CSS performance, even functions well in the blind scenario.