Research On Secure Data Fusion Algorithm Based On Wireless Sensor Networks

Recently,the use of the application fields of Wireless Sensor Network becomes much wider than before,and is mainly used in the military,environmental,healthy,wildlife monitoring,the signal transmission of the wearable equipment and the target tracking and positioning areas.The Wireless Sensor Network plays an increasingly important role in the Internet of Things technology.The Wireless Sensor Network(WSN)has lots of sensor nodes transmitting collecting data directly or indirectly to the base station,in which the data is disposed in the centralized way and feedback to the user.The user terminal system accords to the collecting data from the base station to make relevant decisions.With the increasing application requirements,network node number and net structure is also increasing and changing.When the node transmits data information to the base station,there are a lot of network delays,higher node energy cost,resulting in the shorting of the entire network life cycle and limiting WSN to be used in high level.Based on the above problems,the researchers solve them from different views,and one of the popular adopted technologies is to use data fusion technology.Data fusion technology use sensor node to collect correlation of space or time,remove the redundancy of the data and then send the disposed information to the base station.In wireless sensor network's data fusion aspect,however,there exists lots of security problems.For example,when the nodes are deployed in the unattended or remote application environment,they are easy to be attacked to become as singular node.If there exist a lot of singular nodes,the fusion results of the network data have the negative effects to the user's system.The energy issues of Wireless Sensor Network nodes as well as data fusion technology are analyzed and researched in this thesis,and a kind of relative safety data fusion model is presented.The proposed model uses information identification and inspection methods of the different nodes in ordinary nodes and the base station,which can effectively identify and isolate singular node in the network.Based on the security data fusion model,the data fusion routing algorithm is analyzed and studied in this thesis.Moreover,the data fusion based on shortest path tree routing algorithm is mainly discussed.In addition,the path tree failure caused by frequent changes in the network structure is analyzed and improved,and a data fusion routing algorithm based on Dynamic Path Tree is proposed.Finally,the proposed model and algorithm are synthesized and simulated.Through simulation experiments on the proposed model,the simulation results show that this model can effectively reduce the energy consumption of the network node,decrease the amount of transmission data in the network and prolong the life cycle of wireless sensor network.