Abstract:

While Wireless Sensor Network（WSN） realizes the interconnection of everything, the security of wireless communication is facing challenges. WSN network nodes are deployed randomly, and the network structure changes dynamically, making the existing secure communication schemes unable to be directly applied. In order to solve this problem, this paper uses random Poisson point process to model the location of network nodes, and uses random geometric tools to analyze the physical layer security performance of wireless sensor network system, with the probability of security interruption and connection interruption as indicators. The simulation verifies the correctness of the theoretical analysis. The simulation results show that the security and reliability of the system can be optimized by arranging the sensor node density reasonably.

Key words: Wireless Sensor Network（WSN）, physical layer security, random geometry

摘要：

无线传感器网络（Wireless Sensor Network，WSN）在实现万物互联的同时，无线通信安全面临挑战。WSN网络节点随机分散部署，网络结构动态变化，使得现有安全通信方案无法直接应用。针对该问题，应用随机泊松点过程对网络节点进行位置建模，以安全中断概率、连接中断概率为指标，应用随机几何工具对无线传感网系统的物理层安全性能展开分析。仿真验证了理论分析的正确性，仿真结果表明通过合理布置传感器节点密度可使系统安全可靠性能达到最佳。

关键词: 无线传感网, 物理层安全, 随机几何