Crucial Node Determination And Weaken Method In Wireless Sensor Network

Wireless Sensor Network as the basis of Internet of things, because of its simpledeployment, flexible dispenser, and fast. It has been widely used in intelligent home,agricultural production and so on. The nodes in WSN generally have limited energy, whenthe node is placed in in a special environment which the battery can’t be charge easily,some node in a important place would run it energy out fast, once the node energy run out,the nodes which connect to it can’t deliver the message to the sink node. It will cause thelifetime of the network sharp decline. So how to detect these nodes in WSNs, and takesome measure to these nodes, it will has good effect to extend the lifetime of the network.In this paper, we study the key technologies of the WSNs from the determination ofthe crucial nodes and weaken the crucial nodes. the concrete research content can beconclude as follows:Firstly, the relevant basic knowledge of WSN crucial nodes is studied. We analyzethe weak point of the existing methods of determination the crucial nodes and the crucialnodes weaken methods, and then the method of ant colony optimization in weaken thecrucial node method is introduced. It provides a judgment in crucial node determinationand weakens the crucial nodes.Secondly, the crucial node determination algorithm is studied. We analyse theshortcoming of the existing crucial node determination methods. Based on the nodesenergy consumption in WSNs and the topology effect to the energy,we study the factorswhich affect the energy consumption, we construct the crucial nodes determinationalgorithm based on the factors to the crucial node determination and the node energyconsumption mode, it provide a theroetical basis for finding the crucial nodes in WSNs.finnally, based on the crucial node determination algorithm, to solve the problem ofthe crucial nodes run out of their energy reltive fast,we propose a weaken crucial nodealgorithm based on energy consumption balance, the load of the crucial node redistributethrough the child nodes of the crucial nodes, we use the ant colony optimaztion algorithmto find the optimal path for the child nodes. It can achieve the goal of the energyconsumption balance and weaken the crucial nodes, the result show that the lifetime of network can be prolonged.