A Game-Based Mechanism of Relay Selection for Wireless Network Security

In the wireless Ad-hoc networks, the Relays which transmit message are selfish, they need to consume their energy and compute resources to transmit message. For the problems of the message transmission interrupted by Relay selfishness and the decrease of secrecy rates, we have proposed a Relay-selection method to ensure the security of the Ad-hoc network using game theory incentive mechanism. The method introduces virtual currency, which encourages and regulates the cooperation between different nodes, and proposes the incentives mechanism of twice quotation competition based on virtual currency measurement. According to the secrecy rate and quotation, source nodes will select one Relay which makes the maximum secrecy rate utility. Simulations show that the proposed method improves the average secrecy rate per user up by 20%~32% compared with the conventional Relay selection method.