Research On CPS Based On Software Definition

Cyber Physical System(CPS)represents a new generation of digital systems,and it has gradually become an indispensable part of today's networked world.CPS realizes a series of control operations on the external environment by embedding perception,communication and computing capabilities in physical equipment,and it promotes the development of social intelligence.With the rapid development of information technology,the exponential growth of network data resources,and the increasingly complex physical infrastructure in heterogeneous networks,so there is an urgent need for effective real-time storage,processing and analysis of large amounts of data.However,due to the limitations of the CPS structure,the rigidity of the traditional network structure,the high cost of updating the underlying hardware,and poor scalability,the development of CPS has encountered bottlenecks.To solve these problems,new methods must be proposed from the design and management of the CPS network.Software defined networking(SDN)is a new type of intelligent networking technology,which is regarded as one of the important styles of future networks.Based on the design concept of separating the control plane and the data forwarding plane,SDN can achieve flexible and self-applicable Network management method.Combining the advantages of SDN,a new CPS architecture is proposed,which fundamentally changes the CPS network structure.Through the network's programmability and centralized control system,the flexibility and scalability of CPS management are increased,and realizing the system network service and management effectively.In addition,combining the advantages of cloud computing and fog computing,the architecture of a software-defined Internet of Vehicles is proposed.Compared with the traditional Internet of Vehicles,the SDN controller,fog server,and cloud server cooperate with each other to optimize system load.Moreover,the widely distributed characteristics of fog nodes make the Internet of Vehicles more mobile and improve the delay problem of traditional Internet of Vehicles.Aiming at the software-defined Internet of Vehicles performance issues,test simulations are carried out to verify its performance advantages.Finally,we used AADL to model the system and analyzed its performance advantages,and verified the effectiveness and safety of the system.(1)According to the characteristics of the SDN network,propose a architecture of software-defined cyber-physical system(SD-CPS),and analyze the advantages of the system.And we combined the characteristics of cloud computing and fog computing platform to construct a based cloud and fog integrated SD-CPS platform,than we analyzed and designed its programmable gateway.(2)Apply the SD-CPS to the Internet of Vehicles,and combine the cloud and fog platform to build a cloud and fog integrated car networking architecture.Analyze and design the software-defined Internet of Vehicles architecture control platform,and the software-defined Internet of Vehicles topology,study its load balancing strategy,and finally we used SUMO+NS3 to simulate and analyze its performance.(3)We used AADL to model and analyze the various subsystems of the software-defined car networking CPS system architecture,and analyze the effectiveness and safety of the system through non-functional modeling of the control center unit.