Secure Outage Probability Analysis of Relay Networks Based on Cooperative Jamming

In view of the security of the relay system with eavesdropping node, the secure outage probability of relay system under cooperative jamming mechanism is studied based on the theory of physical layer security. The method of transmitting jamming signals by the source node and destination node is proposed to make the receiving of eavesdropping node worse than the legal node, improving the secure performance of the system. Meanwhile, the self-interference caused by the relay node in the full-duplex is avoided. The theoretical derivation of the system's secure outage probability is also made. The simulation results show that compared with the traditional relay network, the proposed system's secure outage probability is significantly reduced by using cooperative jamming technology. In addition, with the cooperative jamming mechanism, the secure outage probability of the proposed half-duplex network is better than that of full-duplex network.