An Enhanced Sorting Tree Energy-Efficient Routing Scheme for Wireless Sensor Networks with Mobile Sink

Wireless sensor networks with mobile sink are expected to increase the flexibility for gathering information in the large-scale sensing and detecting environments. The sink can randomly move within the sensing area to collect the sensing data. Energy saving becomes one of the most important features for the sensor nodes to extend their lifetime in such networks. To provide reasonable energy consumption and to improve the network lifetime for the wireless sensor network systems, new and efficient energy saving schemes must be developed. A tree based energy-efficient routing scheme is proposed in this paper to reduce the energy consumption in wireless sensor networks with mobile sink. The main goal of this scheme is to reduce the data transmission distances of sensor nodes by using the tree structure and multi-hop concepts. Based on the location of mobile sink, the distances between the sensor nodes, and the residual energy of each sensor node, the proposed scheme makes an adaptive decision for creating the routing structure. Simulation results show that the proposed scheme outperforms the previously known schemes in terms of the energy consumption and network lifetime for the wireless sensor networks with mobile sink.