Mobile Data Gathering and Charging in Wireless Rechargeable Sensor Networks

Abstract

In this paper, a joint optimization scheme of data gathering and charging is proposed to achieve the energy balance for wireless rechargeable sensing networks (WRSNs) consisted of one static base sink, one mobile charger sink and many sensor nodes. In this scheme, the urgent degree of charging is designed by considering the residual life time of nodes and the number of neighbor nodes to help determine anchor points in charging plan. In addition, a metric of forwarding cost value is proposed to construct the network topology targeting at the least cost routing path by considering the energy state, distance between nodes and child nodes number. Moreover the performance of WRSNs is analyzed in terms of average energy and energy stand deviation of each node. Simulation results show that WRSNs can achieve good performance by employing the proposed joint optimization scheme.