Recharging path construction for mobile recharger in wireless sensor networks

Wireless recharging becomes one of the most important problems in wireless sensor networks recently. This paper aims to construct a recharging path for mobile anchor to efficiently recharge the battery of each sensor in a given WSN. Initially, the boundary of recharging circle is analyzed such that mobile anchor can fully recharge the battery of any sensor if the recharging path tangent to the boundary. Based upon the recharging circle of each sensor, an initial recharging path can be constructed. Then this paper proposes a path reduction mechanism for further reducing the path length, aiming to minimizing the recharging path. Performance studies show that the proposed recharging path construction mechanism outperforms the existing works in terms of length of recharging path and recharging efficiency.