Energy-Efficient Data Collection Scheme Based on Mobile Edge Computing in WSNs

Energy-efficient data collection plays an imperative role in maximizing the lifetime of wireless sensor networks. In data collection, mobile sink can balance the energy consumption between sensor nodes and extend the network lifetime, but the route between sensor node to mobile sink changes frequently when the sink moves, which consumes more energy and brings more transmission delay. Static sinks can achieve low transmission delay and do not change the routing frequently. Based on this consideration, this paper proposes an energyefficient routing scheme based on the collaborative work of dual sink nodes (mobile sink and static sink). This scheme considers static sinks to collect data in the center of the networks. The mobile sink moves along the network edge to gather the data, i.e., achieve mobile edge computing based data gathering. Mathematical analysis and simulation results demonstrate that the energy consumption of a node depends to a large extent on the position of the node. Compared with the previous scheme, the proposed method can greatly enhance the network lifetime and decrease the corresponding transmission delay.