结合全双工与协作干扰的无线网状网物理层安全策略

针对无线网状网中缺少窃听者先验知识不利场景中的安全连接问题，提出了一种结合全双工和协作干扰技术的物理层安全策略。利用全双工通信中的自干扰消除技术和协作干扰技术，提出的安全策略可有效劣化位于信息传播范围内包括潜伏在接收节点附近窃听者的接收性能。为保证信息的安全传输给出了协作干扰节点的选择方法，基于随机几何等数学方法导出了选定路径的安全连接概率表达式。性能分析和仿真结果表明，所提方法与仅基于全双工或协作干扰技术的方法相比，其安全性能有较大提升。

Physical layer security strategy based on full-duplex and cooperative jamming in wireless mesh networks

For the secure connection problem in the absence of a priori knowledge of the eavesdroppers of wireless mesh networks,a novel physical layer security strategy based on full-duplex and cooperative jamming is proposed.By deploying the cooperative jamming and the self-interference cancellation in full-duplex communication,the strategy can degrade the performance of the unknown passive eavesdroppers which might be close to the legitimate nodes.A cooperative jammer selection scheme is provided to ensure information transmission security,and the secure connection probability of the predefined multi-hop connection is derived by using the tools of stochastic geometry.The simulation results show that the proposed scheme can greatly improve the secrecy performance compared with the schemes only with full-duplex or cooperative jamming.