无线可充电传感器网络中固定充电器的部署策略

Deployment strategy for static chargers in WRSN

无线可充电传感器网络(WRSN)的传统充电器部署方式覆盖所有区域,而所提方法的基本思想是覆盖所有节点的位置。建立了充电器到最远节点距离的数学模型,分析了节点个数与最小充电半径数学期望之间的关系,提出一种充电器部署策略:根据区域内需要充电的节点的位置,采用最小覆盖圆(SEC)方法,通过欧式投递男孩算法寻找充电器的最优位置。该方法能够减小充电半径,降低最小发射功率,节省平均充电能耗。实验结果显示,区域中节点出现的位置越少,节约的能耗越多。

The traditional deployment strategy of static chargers in wireless rechargeable sensor networks （WRSN） cov-ers all the area. The basic idea is to cover all the positions of nodes. A mathematical model of distance between a charger and the farthest node was established, the relationship between the number of nodes and the mathematical expectation of minimum radius of charging was analyzed, and deployment strategy for static chargers was proposed. The method based on the locations of all nodes that need to be charged in the area, used the smallest enclosing circle （SEC） algorithm and finds the optimal location of the charger through Euclidean delivery boy algorithm. It will decrease charging radius, re-duce the minimum required transmitted power, thereby saving the average charging energy consumption. The experi-mental results demonstrated that the less the number locations that the nodes existed, the more energy will be saved.