Research on secrecy capacity oriented relay selection for mobile cooperative networks

In order to improve the performance of security and QoS provisioning of mobile cooperative network, this paper proposes an efficient approach for optimal secure relay selection, by considering secrecy capacity (SC). Firstly, the channel states are divided into several levels due to their received signal-to-noise ratio (SNR), in the meanwhile, first order finite-state Markov model is employed to indicate the time-varying Rayleigh fading channel. Secondly, Restless Multi-armed Bandit model is involved to demonstrate the secure relay selection problem according to the correlated channel states and the state transition probabilities. Finally, simulation results witnessed the efficiency of the proposed approach.