Research Of The Leach Algorithm Of Wireless Sensor Network Based On Contiki

Wireless sensor network which is low power consumption, numbers, and Automaticnetwork have potential applications in many important areas. But there also haveshortcomings in wireless sensor networks such as energy-constrained, topology variableand so on. This made the routing algorithm for wireless sensor networks was higherrequiremented. In wireless sensor network routing algorithm,the most classic and mostimportant is the leach algorithm which is the first hierarchical routing algorithm.Compared with flat routing network, it is effectively extends the life cycle and increase ofenergy efficiency node. While it is not perfect.This article propose two improved methodsfor its cluster head selection and data transmission which is based on research leachalgorithm. And simulation our study in the open-source stack contiki. The major researchcontents are as follows:Firstly, briefly introduces the research background and current status of this project,and analyzes the key technologies of wireless sensor networks, the main application,architecture, and features。Select a few typical algorithms from both flat routing algorithmand hierarchical routing algorithm to analysis and comparison.Secondly, make a detailed description of the algorithm leach process, analyze itsperformance and propose two improved methods for its shortcomings. One is based ondata clustering algorithm independent competition which is using competitive manner tosend data, and create a cluster in accordance with the actual needs of the network.Another method is make clusters based on sink. sink node is responsible for selecting theentire network cluster head, and then ordinary nodes choose their own cluster headaccording to neighbor list, This ensures that each node in the network as a cluster head areequal opportunity.Thirdly, study the working mechanism and implementation method of the wirelessnetwork communication. Focuses on the implementations of rime which is the networklayer protocol in contiki and the simulation tools cooja. And experimental study of basicwireless communication based on environment of contiki.At last, analyzed the characteristics of leach algorithm an the improvements of the t new algorithm through simulation experiments.And prospects for future work done.