Service Station Positioning for Mobile Charger in Wireless Rechargeable Sensor Networks

Near-field wireless power transfer has been widely used for powering sensor nodes in WSN, where mobile charger (MC) is employed to traverse the network. However, due to the limited energy of MC, MC needs to return to service station (SS) for replacing energy source for multiple times. Therefore, the location of SS directly determines the travelling distance of MC and the charging completion time as well. Motivated by this, we consider the SS positioning problem with jointly optimizing the charging tour of MC. We decompose it into two sub-problems and propose efficient algorithms to solve them based on a novel discretization method.