无线充电WSN中低维护频率的路由与能量补充策略

A Routing and Energy Renewal Policy with Low Maintenance Frequency for Wireless-Recharging Wireless Sensor Network

由于传感器节点的电池容量有限,为使网络可持续运行,可利用无线能量传输技术对节点充电。在使用无线充电设备为传感器周期性充电的场景中,由于现有研究很少考虑节点的频繁充电带来的额外成本问题,以维护频率作为成本的度量,对节点实行按需维护,通过联合优化每个节点的路由和能量补充策略,使充电设备对节点的总维护频率最小。仿真结果表明,算法可以减小网络节点充电的频率,同时缩短充电设备的行驶路程,最终降低网络维护的成本。

Since sensors have limited battery capacities,in order to keep the network functioning continuously,nodes can be charged with the help of wireless power transfer technology. Under the scenario that nodes are periodically charged by a mobile charger in the network,as other researches rarely consider the extra cost when maintaining the sensor nodes,we propose the criteria of maintenance frequency so that nodes are maintained only if necessary. By jointly optimizing routing policy and energy renewal policy of the nodes,we minimize the total maintenance frequency of all nodes. Simulation results show that our algorithm can minimize the charging frequency of the nodes as well as the travelling distance of mobile charger,and finally reduce the cost of network maintenance.