Cooperative Jamming in Downlink Cellular Networks with Available Eavesdroppers' Location Information

In this paper, we enhance physical layer security performance of downlink cellular networks through cooperative jamming technology. Assuming the locations of eavesdroppers (Eve) are available, idle user equipments (UE) are carefully selected to cooperatively transmit jamming signal to confuse eavesdroppers (Eve). Analytical expressions of the connection and secrecy performances are derived, which are validated through Monte Carlo simulations. Simulation results demonstrate that our proposed scheme can improve connection performance, while approaches the secrecy performance of [12]. Furthermore, only 6% idle UEs of [12] are used for cooperative jamming, which helps to decrease energy consumption of network.