Data Density Based WSN Topology Control And Key Management

WSN is widely used in various fields because of its good application features,such as self-organization and low networking expenses.With network scale expanding constantly and the increasing data size between nodes,how to ensure network connectivity,network coverage and the safe transmission of network at the present stage has become this field's research problem.Due to the limited energy of the nodes and the difficulty of replacing the power supply in some environments,reasonable topology control can balance the energy consumption of the network and maximize the service life of the network.Firstly,according to the complex network theory,this paper analyzes the relationship between nodes and the dynamic behavior of wireless sensor networks in real environment.For instance,there are some common network nodes or links to join or exit.This article constructs a WSN topology model conforming to scale-free features.Based on the mean field theory,some statistical characteristics,such as the number of new nodes,the exit probability of the old node and the node saturation,can be deduced and the quantitative relationship of the network node degree distribution can also be derived.Secondly,this paper gives the reason why the non-scale network is prone to data congestion and proposes to alleviate the network congestion caused by data imbalance through the data density to adjust the cluster structure of the merger and separation control mechanism.Finally,based on the topological structure of the mobile ad hoc network,this author gives the pre-allocation scheme,the generation scheme of the cluster key and inter-cluster key.In the aspect of key update time,node anti-trapping ability and controllable network scale,this paper compares the existing algorithm with its own.