感知策略下的无线传感网络保密容量问题研究

无线传感器网络(WSN)指的是由可以感知和检查外部世界的传感器组建而成的分布式无线网络。得益于硬件系统的飞速发展,无线传感网络广泛应用到了军事、智能交通、环境监控、医疗卫生等多个领域。考虑到无线传感器受限于能量,计算能力等诸多因素,其引发出来的无线传感网络通信安全问题成为了一大研究热点。本文旨在探讨如何应用压缩感知技术保证无线传感网络的安全通信,针对放大转发式压缩感知技术下的无线传感网络安全保密问题推导给出了可计算的保密容量门限值。最后分别讨论了不同数目下的活跃感知节点,中继节点以及窃听节点对无线传感网安全保密容量的影响。仿真结果进一步验证了所推导的保密容量结论。

Study on secrecy capacity of wireless sensor networks based on the amplify and forward compressed sensing scheme

The wireless sensor networks (WSN) refers to the distributed wireless networks for the information acquisition and processing from the physical world. As the highly development on the hardware system, the WSN has been widely applied into many areas, such as military, intelligent transpiration, environment monitor, and medical care. Due to the power and computation limitation of the wireless sensor, the security issue of WSN has become a prevalent concern in the wireless communication. This paper mainly discusses the physical security problem based on the amplify and forward (AF) compressed sensing scheme. Moreover, this paper offers a deep insight to the secrecy capacity of wireless sensor network and provides a calculable threshold of the security capacity. Furthermore, we also discuss the impact of the numbers of active sensor nodes, relay nodes and eavesdropper nodes to the secrecy capacity. Simulation results demonstrate the correctness of the derived secrecy capacity.