Cooperative Jamming Strategy Based on Community Detection for Two-Hop Communication Networks

With a wide application of wireless hand-held devices in human life, the relationship among human beings may affect some wireless communication systems. Inspired by it, this paper investigates the influence of social relationships on the secrecy performance of a two-hop wireless communication system with multiple jammers. We model the secrecy problem of the whole transmission as a cooperative jamming game consisting of two independent sub-games, and design a cooperative jamming strategy based on the concept of community detection to seek the minimum secrecy outage probability among all Nash equilibriums. In our proposed strategy, each jammer is divided into different groups due to its relationships with the source, the relay and the destination. Simulations demonstrate that the proposed strategy can successfully have a good secrecy performance for the two-hop system and a high average utility.