The Research Of Routing Protocol In Wireless Sensor Network

Wireless sensor network(WSN) is a self-organizing and muli-hop network system that consists of a large number of sensor nodes organized by wireless communication. WSN is proposed and becomes more and more popular because of its wide application. Routing protocol is a foundamental technology for WSN application, and the data transceiver is a major part of energy consumption, so the study significance of the sensor network routing protocols is obvious.This thesis introduces and summarizes wireless sensor networks, and primarily analyzing the classification, designing objective and impact factor of routing protocols, summarizes and comparing the typical routing protocols. Then, this thesis analyses the problems in the process of realization of LEACH clustering routing protocol: this protocol adopts the method of randomly judge the cluster head in cluster head election phase,ignoring the unbalanced nature of nodes energy consumption;it also does not take into account the single-hop communication will lead to fast energy consumption of cluster heads which are far from base station in data transmission phase. Base on the research, this paper presented an improved algorithm——the clustering algorithm of wireless sensor network based on sensor position.The clustering algorithm based on sensor position divides the WSN area and makes the nodes of every divided area approximately equal,thus balancing the load of whole network. Meanwhile,the algorithm improves the mechanism of cluster head election.It considers the sensor position and the residual energy to make the elected cluster head has more energy and better position in the area.According to the simulation tool of matlab, we simulate the improved algorithm. The simulation result proves that it performs better than LEACH in energy consumption and network survival time.