A Energy efficient data-dissemination protocol with multiple virtual grid in wireless sensor network

Sensor networks are composed of a great number of sensor nodes. Since all sensor nodes are energy-restricted and hardly to recharge. So in order to prolong network life, it is very important to minimize energy consumption. However, the energy consumption may significantly increase if mobile sources or sinks exist in sensor networks. The reason is that the routing information for mobile sources and sinks needs to be update frequently for efferent data delivery. The routing algorithm supporting mobile sinks should consider not only continuous data delivery but also the energy consumption of sensor nodes. However, most of existing research e.g. [2, 3] focuses on even energy consumption while rarely considers the mobility of sinks and sources. In this paper, we propose an efficient routing protocol with multiple virtual grid to reduce energy consumption and improve packets delivery efficiency. Simulation results show that our algorithm can guarantee high data delivery ratio and low average delivery delay, while consumes lower energy then existing routing protocols in sensor networks.