Research On Heterogeneous Network Fusion Method Under Software-defined Iot Architecture

At present,in the IoT perception layer network environment,various types of IoT awareness layer devices are connected,resulting in the isomerization of the Internet of Things perception layer network,which makes the application and development of the Internet of Things fall into the bottleneck.Because these IoT-sensing layer heterogeneous network data cannot communicate with each other flexibly,they can only access the Internet through gateways,which greatly limits the development of the Internet of Things.Therefore,the problem of IoT perception layer heterogeneous network convergence It has become a hot topic at home and abroad.In the IoT environment,the physical infrastructure in heterogeneous networks will be more complex.The software-defined network technology will be introduced in the Internet of Things to provide flexibility and agility for the network connected to the sensing layer sensor nodes or data forwarding layer aggregation nodes of the Internet of Things.And customized management mechanisms.Aiming at the problem of low efficiency of data transformation in heterogeneous network of IoT sensing layer in complex IoT environment,a software-defined method for data fusion of heterogeneous networks under IoT architecture is proposed.The main research work is as follows:(1)Research on IoT network architecture.The existing research on heterogeneous network convergence of the Internet of Things perception layer is mainly based on the design of the Internet of Things gateway.The gateway mode is not scalable and cannot adapt to the complex and ever-changing needs of the Internet of Things.Therefore,this paper introduces software-defined network technology into the Internet of Things environment and studies the network architecture of Software Defined Internet of Things(SDIoT).(2)Software-defined IoT heterogeneous network data fusion method research.Under the software-defined IoT architecture,the OpenFlow protocol is simplified,a topology discovery algorithm is designed,and a software-defined IoT heterogeneousnetwork packet delivery mechanism is proposed.(3)Through the Mininet simulation experiment,the proposed method is compared with the method based on IoT gateway.The experimental results verify the feasibility of the proposed scheme and improve the packet success rate,packet loss rate and average delay.