Supporting of Mobility by Cooperation Nodes in the Wireless Sensor Network Routing

In wireless sensor networks most of the packets are scattered from sensor are directed toward sink nodes. Thus any sensor node can determine the direction of sensed data toward the sink inexplicitly. The purpose of this study is to prevent the extra overhead of packets in network and increase the energy efficiency and consequently increase the life time of network. Most of the propagated protocols in sensor network function accordingly. In this paper first we examine one of the propagated protocols, called directed diffusion then in order to support the mobility in the network. We develop this protocol by using node cooperation and clustering techniques. The modeling results show that this method with low overhead can increase the delivery rate significantly if the nodes move.