Extending Network Lifetime by Exploiting Wireless Charging in WSN

In recent years, wireless energy transfer technology has emerged as a promising solution to supply energy for sensors and extend the network lifetime. In the literature, although significant efforts have been devoted to optimizing the charging schedule, it still remains a challenging problem. In this paper, we study how to prolong the network lifetime by optimizing the charging time. Specifically, we aim at proposing a charging schedule that maximizes the minimum residual energy of sensors. We first mathematically formulate the problem under mixed integer and linear programming. Then, we propose a lightweight heuristic algorithm. The experiment results show that our proposed algorithms extend network lifetime more than 10% compared to the state-of-the-art.