Scheduling Optimization of Charging UAV in Wireless Rechargeable Sensor Networks

Wireless rechargeable sensor networks (WRSNs) with a charging UAV (CUAV) have the broad application prospects for the power supply of the rechargeable sensor nodes (SNs). However, how to schedule the CUAV so that improving the charging efficiency of the whole system is still a vital problem. In this paper, we formulate a scheduling optimization problem of CUAV (SOPCUAV) to jointly reduce the hovering number of the CUAV and the duplicate coverage of SNs for enhancing the charging performance. Then, we propose an improved particle swarm optimization (IPSO) algorithm with the flexible dimension mechanism, using K - means operator to find the hovering position of CUAV and punishment and compensation mechanism to solve the formulated SOPCUAV. Simulation results demonstrate the effectiveness and performance of the proposed algorithm.