A Novel Path Planning of Mobile Charger in Wireless Rechargeable Sensor Networks

Wireless rechargeable sensor networks (WRSNs) have become an important approach to solve the energy constraint problems in traditional battery-powered systems. In WRSNs, one or more mobile chargers (MCs)can traverse the network to transfer energy to sensor nodes. The key issue of MC is to find an optimal charging path. In this paper, we study security monitoring WRSNs for disaster area built from the industrial wireless identification and sensing platform (WISP). By taking advantage of the strong coverage of equilateral triangle, a novel charging path named TRIANGLE is proposed as a static path planning method for a single MC. Comparing with S-CURVES(ad) which has been proved to be a superior charging path, simulation results demonstrate that the proposed charging path TRIANGLE has a better performance in terms of the number of alive nodes, the charging efficiency and the utilization rate of energy.