Optimization Of RPL Routing Protocol And Integrated Reseach Of SDN And Wireless Sensor Networks

Wireless sensor network promoting the development of the Internet of things,at the same time,it has encountered many obstacles.Energy constraints,data redundancy and network structure are three major problems,they restricting the development of wireless sensor network.Therefore,how to realize the load balancing system effectively,improve the flexibility of the network has become a popular study point.To solve the problems existing in the wireless sensor network,this paper put forward the RPL topology maintenance mechanism,and based on it,doing the research of integration between software defined network and wireless sensor network,achieve network load balancing,at the sanme time improve the control ability of network users.The main work of this paper described as follows:(1)Improved the RPL routing protocolOn the issues of the deficiency in design function of RPL,an active route update mechanism based on energy aware is proposed.The core principle is use RPL to control parameters of the information,monitor the remaining power of the node,and then predict the change of energy consumption in the network.The scheme can distribute the data forwarding tasks more reasonably and make every node achieve the energy balance,achieve the purpose of prolonging the network lifetime.In this paper,the experiment based on the Cooja simulation platform,the energy consumption of each node is obtained by configuring the Collect-View plug-in,and the feasibility of the scheme is verified.(2)Research on Integration of SDN and Wireless Sensor NetworksOn the basis of the previous research work,based on the SDN technology,this paper makes the requirment analysis of the wireless sensor network,and puts forward the general design framework and the flow table model of the software defined wireless sensor network.In this paper,based on the Contiki operating system,the software simulation environment is set up and the experiment node deployment is completed.After verifying the feasibility of the integration scheme,dynamic network environment was simulated by the Mobility plug-in,and then test the performance of the original distributed routing scheme and the centralized routing scheme in different network environment,completed the analysis of WSNs-based SWN applications.Finally,summarizes the whole work of this paper,analyzes the deficiency of the project,and points out the future work.