Abstract
One of the challenges in sensor network is sustaining long-term operation with limited resources such as energy, storage capacity and computing capability. Because the life time of each sensor node affects the life time of whole sensor network, so many researches about prolonging sensor life time have been done. Nonetheless, the most part of such researches have tended to center around the study on collecting information at the fixed position. Therefore if there are several mobile sinks in wireless sensor network these researches aren't suitable. Thus we propose a cluster-based routing protocol for supporting mobile sinks in sensor network which provides reliable, scalable and efficient data delivery in a sensor network which includes several mobile sinks. This paper will focus on the efficiency of energy consumption. So we construct and maintain permanent grid structure to reduce the number of flooding control packets. Also we figure out void grid problems to support reliability.
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