An Improved Algorithm Based On LEACH Protocol Of WSN

Wireless Sensor Network is a convergence technology of computer network, communications and sensor. WSN usually is widely applied in the military operations,environmental monitoring, medical rescue, traffic control, home automation and other commercial applications. Study at home and abroad of WSN is not yet mature.Carrying out this cutting-edge technology research timely will bring great value andstrategic significance to the development of the country. Wireless sensor network has a very broad prospects, it can be applied to many areas of military defense, disaster relief, health monitoring, urban management, hazardous area control, health care, etc., Sensor networks, routing is a supporting technology is a prerequisite for wireless sensor networks for target recognition, tracking, monitoring a wide variety of applications, is also one of the hot issues in sensor network research.Also vary according to the requirements of different applications, wireless sensor network nodes in their own performance. At present, energy efficiency is to evaluate the existing WSN routing protocol network performance is an important indicator to measure network energy effective evaluation criteria is the lifetime of the network.This article describes the background of WSN routing protocols to improve the general description of the concepts and architecture of the WSN, WSN routing protocol features and key technologies, flat routing protocols, and flooding as the representative of LEACH as the representative of the sub-cluster routing protocol, and these protocol for detailed comparison. Detailed analysis of the LEACH cluster head election algorithm, and analyzes the energy distribution, the establishment of the energy consumption model.The focus of this paper is improvement to the LEACH protocol, half-network election, the new cluster head election strategy and clustering algorithm, the formation of the node residual energy of LEACH-IMP algorithm, the algorithm is to reduce Leach agreement cluster in the formation of energy consumption. Cluster election, when the energy of the cluster head is less than the average of the cluster of the remaining energy to optimize the threshold and the cluster head. When the average energy of the cluster is less than a threshold to initiate the re-election call, all clusters within the whole network to respond on the call to meet the re-election re-election of the conditions of the cluster will be added in order to reach the Half-network election. When you reach the required time for the entire network re-election. Compared to Leach, this algorithm has higher energy efficiency, can effectively prolong the network lifetime, node energy is more balanced. And the Matlab simulation.In order to obtain the agreement improved results, the use of matlab simulation of LEACH-IMP protocol and LEACH protocols in a100*100m2area. Set the initial energy of all nodes1, Sink node in the target area. The simulation includes the network lifetime network lifetime number of nodes. Simulation results show that the agreement Leach improvement in these areas is significantly better than LEACH protocol.