Research And Improvement Of Routing Protocol In Wireless Sensor Network Based On PEGASIS

With the rapid development of information science and networkcommunication, the wireless sensor network brings great and profound changeto people. So far, it has been widely used in air quality monitoring, pollution inindustrial, smart home, national defense and so on. However, the actualapplication, because the monitor environment is complex, after wireless sensornetwork node is completely deployed, wireless sensor nodes and battery can notbe replaced. Therefore, when the node energy is constant, design of a routingalgorithm is very important that the routing algorithm can effectively extend theoperation period of wireless sensor networks, reduce the energy of transmitinformation and improve the efficiency of transmit information.LEACH routing algorithm is a typical hierarchical protocol, the algorithmhas the advantages of simple cluster head selection method and single networkarchitecture and so on. However, the algorithm also has some disadvantages,such as network operation time is short and the transmission efficiency of clusterhead is low. PEGASIS routing algorithm is evolution from LEACH algorithm.According to the greedy algorithm, the WSN nodes turn into a chain and a single cluster head to transmit data. But there is a flaw in this algorithm that there isdata transmission delay and cluster head node is single. Based on the problemsof PEGASIS and LEACH algorithm, this paper put forward the center of massconcept-PEGASIS routing improve algorithm. According to the clustering wayof LEACH, the algorithm divides the region into same size ones. The dividedregions are turned into a chain successively by the distance between the nodeand the base station.The cluster way not only reduces the energy consumption ofnodes but also lowers data transmission delay. Besides, it improves theutilization of cluster head and extends network up-time by introducing centroididea. Finally simulate three aspects of network up-time, amount of datareceiving for cluster head node as well as base station, the results showimproved routing algorithm extends the network up-time, increase the amount ofthe data receive from cluster head and the base station, in a certain extent, solvethe problem of LEACH, PEGASIS network routing algorithm in running timeshort, low data transmission efficiency.