阴影衰落环境下无线传感器网络连通性研究

Research on connectivity of wireless sensor networks in a shadow fading environment

在无线传感器网络的大规模部署过程中,各种障碍物和地形所引起的阴影衰落效应将会影响传感器网络的通信能力,从而影响传感器网络的连通性。针对阴影衰落环境下无线传感器网络的连通性问题,为了得到网络无孤立节点概率表达式作为网络连通概率的上界,引入网络的连通度。采用对数正态阴影衰落模型,主要分析衰落因子对连通度的影响,论证了在采用相同泊松过程的随机部署的无线传感器网络中,阴影衰落效应在一定程度上有利于提高网络的连通度。仿真结果证实了结论的正确性。

In the deployment process of wireless sensor networks, the shadowing effects caused by a variety of obstacles and terrain affect the communication capability of the sensor network, thus affecting the sensor network connectivity. By analysing the connectivity of wireless sensor networks in the shadow fading environment and in order to get the network with no isolated node probability expression as the wireless sensor networks which is randomly deployed in the homogeneous Poisson process, the shadowing effect is conducive to a certain extent, improve the network connectivity. The simulation results confirm the validity of the conclusions.