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节点调度是均衡无线传感器网络能量有效方法之一.分析基于测距的睡眠调度算法(RBSS)发现其招募节点能耗过大,造成其过早死亡,影响网络的生命周期.针对这个问题,本文在正六边形覆盖模型的基础上,基于能量均衡思想,提出基于测距的均衡式招募调度算法(RBDRS).RBDRS算法将协作节点招募的任务转移到新招募的协作节点上,均衡网络能耗.招募节点通过测距招募距其最远的邻居节点作为协作节点,协作节点再依次为招募节点招募新的协作节点,直至无法招募到新的协作节点.仿真实验结果表明,与RBSS算法相比,在不增加额外开销的条件下,RBDRS算法能够有效减少工作节点数目,提高网络覆盖率,均衡网络能耗,延长网络生命周期.
Node scheduling is one of the most effective ways to balance the energy of wireless sensor networks.Analyzing the RBSS algorithm finds that its recruiting node consumes too much energy and causes premature death and affects the life cycle of the network.For this problem, Based on the regular hexagon coverage model, an RBDRS algorithm based on the idea of energy balance is proposed. The RBDRS algorithm transfers the task of cooperative node recruitment to newly recruited cooperative nodes to balance the network energy consumption The recruiting node recruits the neighbor nodes farthest away from it as the cooperating nodes by ranging, and then the cooperating nodes recruit new cooperating nodes for the recruiting nodes in turn until the new cooperating nodes can not be recruited.The simulation results show that compared with the RBSS algorithm , RBDRS algorithm can effectively reduce the number of working nodes, improve network coverage, balance network energy consumption and extend network life cycle without additional overhead.