无线传感器网络能量均衡混合拓扑维护策略

Wireless Sensor Networks Energy Balance Hybrid Topology Maintenance Strategy

针对恶劣环境下无人值守的无线传感器网络能量受限特性,提出一种时间和能量混合拓扑维护策略,以达到实现节点能量均衡的目的。将拓扑控制分为网络初始化阶段、拓扑构建阶段和拓扑维护阶段,在随机部署和虚拟骨干网络构建的前提下,确立了能量和时间作为拓扑维护触发条件的合理性。仿真表明,所提出的混合拓扑维护策略使网络生命周期提升了44.6%,90%覆盖率结束时间增加了1.4倍,为无线传感器网络的节能部署提供了参考。

A hybrid topology maintenance strategy based on time and energy was proposed to achieve node energy balance in response to the limited energy characteristics of unattended wireless sensor networks in harsh environments.The topology control was divided into the network initialization phase,topology construction phase,and topology maintenance phase.Under the premise of random deployment and virtual backbone network construction,the rationality of using energy and time as triggering conditions for topology maintenance was established.Simulation results showed that the proposed hybrid topology maintenance strategy could improve the network lifetime by 44.6%,and the ending time of 90%coverage increases by 1.4 times,which provided a guidance for energy-saving deployment of wireless sensor networks.