Research On Clustering Routing Protocol And Node Trust Mechanism In Wireless Sensor Networks

In recent years,with the rapid development of network communication technology,micro sensor,semiconductor and chip design technology,wireless sensor network(WSN)has been widely used in habitat monitoring,miner safety and other fields.Wireless sensor network is composed of several micro sensor nodes which are difficult to replace the battery.These sensor nodes are often arranged in the relatively harsh environment.The energy consumption and security of nodes become the key limitation and challenge of WSN.Therefore,it is necessary to study the reliable routing protocol with high energy efficiency.This paper studies and discusses WSNs network topology,data transmission and node trust mechanism from two aspects of energy consumption balance and routing soft security.As a better network energy utilization strategy,it is of great significance to research and improve the clustering routing protocol theory.This paper improves and optimizes the related algorithm,and verifies it by simulation in order to balance the energy consumption and improve the work cycle of network.LEACH does not consider the uniform distribution of sensor nodes too much.Random clustering results in different cluster size,imbalance of energy consumption and rapid failure of some sensor nodes.To solve this problem,this paper presents an improved clustering routing algorithm based on memetic algorithm to optimize fuzzy clustering(MFCRA).Firstly,according to the location information of all nodes in the sensor network,memetic algorithm and fuzzy clustering algorithm are combined to cluster the sensor nodes.This algorithm can make the nodes cluster more evenly;Secondly,in the cluster head election stage,the energy of the node,the distance from the base station and the cluster center are considered,and the adjustment factor is added in the cluster head election formula to ensure that the most reasonable cluster head node is selected from each cluster;Finally,Dijkstra algorithm is used to construct the optimal path from the base station to each cluster head for data transmission.In the practical application of wireless sensor networks,the security of nodes is also important.Based on the improved clustering routing algorithm,this paper establishes a trust model for sensor nodes and proposes a clustering routing algorithm based on node trust mechanism(NT-MFCRA).The communication behavior of the node is taken as a parameter to solve the trust value of the node and evaluate the trust of the node.The base station selects the cluster head according to the data sent by the cluster head and the trust value of each node in the cluster recorded by the cluster head to ensure the security of the cluster head node.Finally,in order to verify the functions and performance of the proposed algorithm,the paper simulates the improved algorithm by setting the relevant parameters.The experimental results show that the improved clustering routing algorithm proposed in this paper can cluster more evenly and stabilize the cluster structure,which makes the sensor nodes perform better in energy consumption balance and lifetime extension.The establishment of node trust model can effectively identify malicious nodes on the premise of low energy consumption,avoiding the impact on cluster head election,and then improve the reliability of the network.