Dynamic clustering with a mobile sink in wireless sensor networks

Wireless sensor network is one of the most important tools to achieve information and understanding of the environment, which has attracted many scientific researches in recent years. Network lifetime is the most important criterion for measuring and evaluating the wireless sensor network. One of the common techniques to improve the network lifetime is clustering. This solution, despite its benefits, has caused a problem of energy hole. Therefore, in this paper a dynamic clustering method with a mobile sink is proposed to moderate the energy hole. In proposed protocol, we use an unequal clustering method and multi-objective secure algorithm to regulate energy consumption and for each cluster, we consider the vice cluster-head node. Simulation results show that our proposed method can effectively reduce energy loss, balance energy consumption and increase network lifetime.