Research Of Sensor Network Data Fusion Based On Mobile Agent And Application In Greenhouse Environment

WSNs(Wireless Sensor Networks) is widely used in environmental detection areas, because the sensor nodes are randomly deployed, result in monitor range overlap and sensory data redundancy. To improve this situation, consider combining mobile agents and the data fusion technology to solve the problem of data redundancy.Firstly, the paper introduces the architecture of wireless sensor networks, characteristics and key technology simply. Secondly introduces the technology of wireless sensor networks data fusion, classifies the existing data fusion techniques, and summarizes several kinds of typical data fusion method in current. Finally, expounds the architecture of mobile agent, characteristics and key technology.Aiming at the shortcomings of the C/S model, combining with the advantages of mobile agent technology in wireless sensor network. Design of a wireless sensor networks management model based on mobile agents, the cluster head node creates and sends mobile agent to the target node according to the application needs, collects and managers the data perceived by nodes, and analyses the theory from energy consumption, the network delay and data fusion.On the basis of management model proposed, the cluster head nodes sending mobile agent to the target area for data collection, mobile agent coding the collected data to sequence, as the mobile agent migration, overlaping code sequence to the overlapping function, and integrating the weighted data by fusion algorithm, so as to improve data accuracy and reduce data redundancy. The simulation results show that compared with the C/S model of data fusion, wireless sensor networks data fusion algorithm based on mobile agent in terms of energy consumption and latency have obvious improvement.Finally the paper applies the mobile agent data fusion to the greenhouse environment, collects para meters (temperature, pressure and humidity, etc.) data of greenhouse environment through the mobile a gent and analyzes the strategy of data fusion of two lavers of structure between sink nodes-cluster node and cluster node-cluster member.The thesis is supported by the National Natural Science Foundation Project(No:612610001),name "Research on key technology of data aggregation and transmission in WSNs and its application in facility agriculture in semiarid areas".