Research On Wireless Sensor Network Routing Protocol Based On Quad-tree Multi-level Data Fusion

Wireless Sensor Networks(WSNs)is a self-organizing network system formed in a multi-hop manner by a large number of sensing nodes deployed in the monitoring area.As one of the key technologies of the Internet of things,WSNs is mainly used to sense,collect and process information that users in the monitored area are interested in,and to transmit those data to users.As an internationally watched research field,Wireless sensor network(WSN)'s application involves People's Daily lives,social economic development,national defense security and other important areas.Disciplines involved are deep and wide,knowledge system is highly concentrated as well.Sensing nodes deployed in wireless sensor network are not only small in volume,but also able to work independently.Based on the characteristics of node sensing,some information that could not be captured by conventional means in harsh environments could be provided to the user,organically combining the physical information in the objective world with transmission network.In large-scale network,a large number of nodes are deployed usually for sensory information in monitoring area,which will lead to the increase in nodes sensing area coverage and network redundancy information.While the transmission of redundant information increases the energy consumption of the nodes.Therefore,reducing the redundant information transmission to balance the energy consumption of the nodes is one of the key problems in the research of wireless sensor network.Thesis proposes a wireless sensor network routing protocol which is based on quad tree multi-level data fusion——QUCRP.First,expand the monitoring area to a square one and uniformly cluster the expanded area based on quad tree iterative partitioning.Build network topology structure on the basis of quad tree hierarchy and encode the cluster groups according to hiberarchy and orientation.Then start from the remaining energy of the sensing node,the distance between the sensing node and the grid center the node locates,and the communication power of the sensing node,choose the sensing node with the best comprehensive performance as the cluster head nodes.Set a reasonable cluster head work cycle to ensure more balanced energy consumption of thecluster head nodes.Add routing intermediate node for corresponding quad tree hierarchy.The data forwarding between adjacent routing layers is entirely responsible for the intermediate nodes of the routing.Adopt forwarding while fusing strategy when routing to fuse the node data.Finally,QUCRP is simulated from the aspects of the data fusion,the average energy consumption of nodes,query on the average energy consumption as well as the life cycle of network,and compared with other routing protocols for performance analysis.Experimental results show that QUCRP has certain advantages in terms of network redundant information transmission,average energy consumption of nodes,and network overall energy consumption.QUCRP has been proved to be a highly efficient and practical wireless sensor network routing protocol.