Research On WSN Topology Control Technology

Wireless sensor network(WSN)is an intelligent information management system which integrates information collection,transmission and processing in one.It has a broad application prospect and is currently a very active area.WSN is a self-organized network composed of a large number of micro sensor nodes,which provides a lot of research topics to scholars,and topology control is one of the most basic problems.Topology control is to study how to form a good network topology,which provides support for data fusion,routing protocol and target location.WSN nodes are usually deployed in large scale and have random and self-organizing properties.The network organization methods are usually varied,and the energy of nodes is very limited,Therefore,in the design of wireless sensor networks,to improve the efficiency of routing protocols and MAC protocol,to extend the network life cycle,we must have a good network topology.Topology control algorithm based on clustering mechanism is a kind of topology control algorithm.Based on the analysis of the existing clustering algorithms,the paper focuses on the non-uniform clustering algorithm,and the problem of the non-uniform clustering algorithm,A topology control algorithm based on Uneven Clusting Low-Energy(LEUC)is designed,and the main results are as follows:First of all,in the existing non uniform clustering algorithm,the problem of network energy consumption and node density are not considered in the clustering process,the network energy consumption is reduced,and the network life cycle is shortened.The LEUC algorithm is designed,in which the residual energy of the nodes is considered when the candidate cluster head is elected,the probability that the remaining energy of the nodes become the candidate cluster head is increased;Calculate the radius of the competition to consider the node density,in order to makethe nodes of the dense region into small clusters,sparse area into large clusters;Judging the distance between the cluster head node and the cluster centroid,if the cluster head is too far from the center of the cluster,the cluster head can be re-elected to avoid the excessive energy consumption of the remote node and the cluster head,so as to achieve the purpose of reducing the energy consumption of the nodes,balancing the network energy consumption and prolonging the network life cycle.Secondly,aiming at the problem that the single hop distance of the cluster head is too long and the energy consumption is too large,the multi_hop communication strategy is designed in this paper,which is used as a relay node in the cluster,and the cluster nodes are transmitted to avoid the energy consumption of the cluster head.At the same time,considering the distance,the residual energy,the link cost factor,when choosing the next hop relay node,to avoid single node energy consumption,so as to achieve the purpose of prolonging the network lifetime.Finally,the simulation results of the above results are carried out by using OPNET simulation tool.The results show that the LEUC algorithm can effectively balance the energy consumption of the network nodes and prolong the lifetime of the network,compared with the LEACH and EEUC algorithm.