A Gird-Based Joint Routing and Energy Replenish Scheme for Rechargeable Wireless Sensor Networks

Abstract

To maintain the durability of data collection and improve charging efficiency for a mobile wireless charging vehicle (WCV) in Wireless Rechargeable Sensor Networks (WRSNs), a grid-based joint routing and energy replenish scheme (GRER) is proposed in this paper, aiming to achieve energy balance and maximize recharging benefit. Based on WCV charging service, network is firstly divided into several virtual grids with the help of minimum coverage area idea and a simple concurrent multi-hop chain-based routing protocol is proposed for forming data transmission links. Then, WCV visits and charges nodes using an angle expansion-based breadth-first strategy (AEBF) within the limited battery capacity. Simulation results demonstrate that GRER outperforms FCFS, NJNP, LADP and RCSS schemes in regards to network lifetime, energy balance and charging efficiency.