Optimal Mobile Sink Path Planning for Heterogeneous Wireless Sensor Networks
Chwan-Lu Tseng, Che-Shen Cheng, Yu-Hsien Hsu, Bing-Hung Yang, Chia-Chi Chung · 2018
Along with the rapid development of wireless sensor networks, various applications are getting widespread. Since some of the applications involve with vibration signal, image or video transmissions, sensor nodes with different load burdens and the resulted energy holes should be taken into account. Considering the node energy uniformity of the deployment field and the prolongation of the network lifetime, an optimal mobile sink path planning problem for wireless sensor networks with heterogeneous nodes is investigated. By using the load balance and relay node techniques, a path for mobile sink moving to efficiently collect the measured data, including temperature, humidity (sensed by light-load nodes) and vibration (sensed by heavy-load nodes). Simulation results indicate that the proposed method is able to extend the network lifetime by increasing the energy uniformity, in the presence of light-load nodes and heavy-load nodes.