The Improvement And Simulation For LEACH Clustering Routing Protocol

With the rapid progress of Micro-Electro-Mechanical-System,System-on-a-chip,Wireless Communication and low-power embedded technology,giving birth to the wireless sensor networks.Because of its low power consumption,low cost,distributed and self-organization,etc.,it leads the perception of the data,information collection and industrial control to make a big and new change.It is made with a lot of micro-sensor nodes which can percept,compute and communicate,which spontaneously form a network,and collaborative complete the monitoring tasks.Wireless sensor network is widely used in military reconnaissance,environmental monitoring,health care,space exploration,and some harsh production environment,so that people at any time,place and circumstances can get a lot of information.With the rapid development of science and technology,wireless sensor networks will become one of the century's most influential technologies of 21th century because of its potential and wild application prospect.Firstly,this thesis made a detailed introduction of wireless sensor networks and its architecture.Secondly,this introduced the application and prospect of wireless sensor networks.Thirdly,it introduced the key technology of wireless sensor networks,followed then it discussed some classic routing algorithm,and lastly it did a thorough research and comparison with various algorithms.After the introduction of LEACH algorithm and its various modifications algorithm based on inadequate for LEACH algorithm,this paper made a corresponding improvement and proposed multi-hop routing strategy—LEACH-Appl and clustering routing strategy—LEACH-App2.And then after combining the two algorithm,this paper proposed an energy-balanced unequal multi-hop clustering routing protocol—LEACH-EUMC.In this algorithm,firstly it introduced the concept of the optimal number of cluster heads and proved that the number of radio cluster head of the sensing area is not random,and through that network can avoid the number of cluster head in monitoring area being too much or too little.Secondly,when choosing the cluster head,the improved algorithm fully considers the distribution of the network nodes and the energy status of the nodes,and it solved the uneven distribution of the cluster heads and the problem that there is no head node in a large area.Finally,this algorithm improved communication with the cluster head node to avoid single-hop mode of telecommunications by taking a single-hop and multi-hop routing combining.In this paper,we use MATLAB simulation to compare LEACH and its improved algorithm SEP?LEACH-C?LEACH-App1?LEACH-App2?LEACH-EUMC in node lifetime,network consumption and the packet number transmitted to the base station.Experimental results show that the proposed algorithm enables more uniform division of clusters and cluster head selection fairer,also it extend the time of first and 80%dead nodes and network lifetime,and improve greatly the packet numbers to BS.