无线传感器网络中不同节点分布模型的性能分析

Performance Analysis of Different Nodes Distribution Models in Wireless Sensor Networks

针对传感器网络中较为关心的生存时间和覆盖率问题,对不同分布模型下的网络性能进行了分析。根据传感器网络中节点密度的分布规律,基于传统的分簇LEACH协议,选择对均匀分布、一次衰落和0.5方衰落三种随机分布场景下传感器网络的生存时间、覆盖率等指标进行了研究,仿真实验表明:对于三种传感器节点的撒布模型:一次衰落模型网络生存时间最长,但覆盖率最低;均匀分布网络生存时间最短,覆盖率最高;0.5次衰落模型下两项性能折中,更加符合现实需求。

Aiming at the commonly-concerned issue of lifetime and coverage ratio in WSNs, network per- formance in different distribution models is analyzed. In accordance with the distribution regularities of node density in WSNs and based on the traditional cluster LEACH protocol, the lifetime and coverage ratio of WSNs is discussed under three random distribution scenarios of first-order fading distribution, uniform dis- tribution and 0.5 order fading distribution. Simulation experiment indicates that in the three different dis- tribution models, the first-order fading distribution is the best in extending network lifetime but the lowest in coverage ratio, while the uniform distribution performs on the contrary; 0.5 order fading distribution strikes a trade-off in these two performances, thus more suitable for practieal demand.