Mobile Data Gathering and Energy Replenishment in Wireless Sensor Network

In this paper, we propose a new data-gathering mechanism for large-scale wireless sensor networks by introducing mobility into the network. We propose a framework of joint Wireless Energy Replenishment and anchor-point based Mobile Data Gathering (WerMDG) in WSNs by considering various sources of energy consumption and time-varying nature of energy replenishment. Data aggregation, as a typical operation in data gathering applications, can cause more energy wastage since sensor nodes, when it is not receiving data may keep in the listen state during the data collection process. To that end, we first determine the anchor point selection strategy and the sequence to visit the anchor points. Mobile data gathering has been considered as an efficient alternative to data relaying in WSNs. However, the time variation of recharging rates in wireless rechargeable sensor networks imposes a great challenge in obtaining an optimal data gathering strategy.