Improvement Of Routing Protocol In Wireless Sensor Networks Based On LEACH

WSNs(Wireless Sensor Networks)is a multi hop self-organizing wireless network system.It is composed of a large number of sensor nodes,which cooperate to collect data.Each sensor node has the functions of data collection,data processing and wireless communication.Energy consumption and network lifetime is an important research issue in WSNs.LEACH protocol,as the most classical hierarchical routing protocol,extends the network lifetime by 15%.But there are still many deficiencies in the LEACH protocol.Because the micro sensor nodes rely on battery power,so power conservation is very important,and the Randomness that LEACH protocol selects cluster head nodes is too strong and LEACH protocol in terms of energy consumption has improved space;because the LEACH protocol requires all the nodes communicate with base station directly,so the LEACH protocol cannot be applied in large-scale WSNs;LEACH protocol needs to be added the data fusion technology to solve problem of data redundancy,but it does not design a specific data fusion algorithm.This paper starts with the LEACH protocol,analyzes the problems and puts forward the improvement.At last,Simulation experiments prove the superiority of the improved protocol.The main contributions of this paper are:(1)the operation mechanism of LEACH protocol and its advantages and disadvantages are analyzed and studied in this paper.According to the defects of LEACH protocol in energy consumption,an improved protocol LEACH-CR is proposed.This paper introduces the characteristics and operation mechanism of LEACH-CR protocol in detail from four aspects: cluster building,data collection,data transmission between clusters and reselection of cluster heads;(2)Using MATLAB tools for simulation comparison between LEACH-CR,LEACH and LEACH-C.AS time goes on,this paper compares the three protocols in the number of surviving nodes and the total energy of the network.Simulation results show that the LEACH-CR protocol is superior to LEACH and LEACH-C protocol in reducing energy consumption.(3)Aiming at the defects that LEACH protocol can't be used in large-scale wireless sensor networks,the LEACH-LS protocol is proposed in this paper.The LEACH-LS protocol establishes a number of data communication links to the base station through the cluster head node layer,so the LEACH-LS protocol can be used in large scale wireless sensor networks.The MATLAB protocol is used to simulate the network lifetime and the number of packets collected of LEACH-LS protocol.The simulation results show that the LEACH-LS protocol can be used in large-scale wireless sensor networks.(4)For the LEACH protocol without the specific design of the data fusion algorithm,this paper adds the averaging method and the minimum distance method based on the LEACH protocol,which effectively solves the problem of redundant data from a single sensor node in a short period of time;In addition,this paper designs a data fusion algorithm of recurrent neural network based on the LEACH protocol,which can effectively solve the data redundancy problem of the neighboring sensor nodes at the same time.