Study On Data Fusion Technology Of Wireless Sensor Networks

Data fusion technology of wireless sensor networks is analyzed and discussed.Theoretical basis,fusion method and fusion result of the existing data fusion method are introduced in detail.Energy consumption of different algorithms in data fusion process is analyzed due to the particularity of wireless sensor network.The data fusion scheme based on security is analyzed,especially effect of data fusion mechanism based on privacy protection on security of data fusion and privacy protection data fusion commonly used.Multi-tiered privacy protection data fusion protocol based on Qos(MPPDF-Qos)which contains three types of nodes: query server(QS)node,fusion node and leaf node is proposed in the subject.It is assumed that QS node allocates a communication delay(ComD)and a fusion delay(FusD)after time delay(TiD)and all nodes can communicate in ComD and can be transmitted upwards and merged in FusD.In addition to sending the preprocessing data to cluster head,nodes communicate only within the same group to avoid different level data collision in MPPDF-Qos that also provide different privacy protection according to the required privacy level.Therefore it has lower energy consumption to meet data fusion accuracy and privacy requirements and provides basis for selecting the safe and low-power data fusion method in practical application of wireless sensor networks.