Research On Routing Optimization Algorithms For Clustering Based Wireless Sensor Network

A wireless sensor network(WSN)is a multi-hop data collection network formed by a large number of sensor nodes to collect specific parameters in the coverage area.WSN is an energy-limited system where sensor nodes are powered by batteries,and research on WSN is mainly focused on meeting application requirements under energy-limited conditions.Clustering-based routing algorithms,as an effective way to improve energy efficiency in sensor networks,have received extensive research attention.Clustering algorithms divide the network into clusters and cluster heads is used to collect member data,fuse data,and forward it to the sink,effectively reducing the amount of data transmitted,thus reducing energy consumption and extending network lifetime.This paper investigates distributed and centralized clustering routing algorithms for different WSN application scenarios,with the objective of improving network energy efficiency,optimizing network clustering routing and extending network survival time.The main contributions of this paper are as follows.(1)The distributed WSN clustering routing algorithms are studied and improved strategies based on LEACH algorithm are analyzed.The proposed strategies address the shortcomings of the LEACH algorithm,including the improvement of the cluster head election mechanism,using backup cluster heads to achieve self-healing routing,and cluster heads multi-hop to reduce energy consumption.These improvements effectively enhance the energy efficiency of distributed algorithms.(2)The centralized WSN clustering routing algorithms are studied and a clustering optimization algorithm based on binary partial swarm optimization(BPSO)is proposed.The WSN clustering problem is solved by BPSO algorithm,and a fitness function considering multiple factors is designed to obtain the optimal network clustering.The Dijkstra algorithm is used to construct the minimum cost multi-hop routing,further improving network energy efficiency and extending network lifetime.(3)The application of WSN clustering routing algorithm for transmission corridor scenario is investigated and a routing algorithm based on the harmony search algorithm is proposed.The network is uniformly partitioned,the optimal set of cluster head nodes is obtained using the harmony search algorithm,and the energy hole effect is avoided by constructing a reasonable inter-cluster multi-hop routing.Simulation results demonstrate that the proposed algorithm has good applicability for narrow and long space.