Abstract:

Through forming coalitions, the wireless node cooperation can improve the physical layer security capacity. The existing research only focuses on the partially optimal problem in the coalition without considering the competition and the interference among the coalitions. A distributed relay selection algorithm is proposed to achieve the maximum security performance based on the coalition game. The optimal power allocation algorithm is also proposed to deal with the competition and interference based on the non-cooperative game with the price. Then the optimal coalition power is divided by the node power according to the channel gain to the destination. The simulation results indicate that not only the stable coalition can be formed, the proposed algorithms effectively save the power cost and improve the security utilities of the coalition.