Abstract
Traditionally, routers and other network devices encompass both data and control functions in most large enterprise networks, making it difficult to adjust the network infrastructure and operation to large-scale addition of end systems, virtual machines, and virtual networks in industrial comprehensive automation. A network organizing technique that has come to recent prominence is the Software-Defined Network (SDN). A novel SDN based industrial control network (SDNICN) was proposed in this paper. Intelligent network components are included in a SDNICN. Switches in SDNICN provided fundamental network interconnection for the whole industrial control network. Network controller is used for data transmission, forwarding and routing control between different layers. Service Management Center (SMC) is essentially responsible for managing various services used in industrial process control. SDNICN can not only greatly improve the flexibility and performance of industrial control network but also meet the intelligence and informatization of the future industry.
Highlights
Ethernet and industrial Ethernet are increasingly being applied in the field of industrial control.[1,2,3,4] Various approaches from hardware and software, such as hardware updating, improvement of protocol, optimization of scheduling strategies, and so on, have been tried and used to further improve efficiency of industrial network
Latest research has shown that flexible management of network architecture can further improve network performance in a quite different way from those mentioned above.[5,6,7]
Application of network technology in industrial control transformed the control architecture from conventional simple closed-loop control to large-scale networked control based on fieldbus, industrial Ethernet, and even wireless sensor network (WSN)
Summary
Ethernet and industrial Ethernet are increasingly being applied in the field of industrial control.[1,2,3,4] Various approaches from hardware and software, such as hardware updating, improvement of protocol, optimization of scheduling strategies, and so on, have been tried and used to further improve efficiency of industrial network. Communication in control and supervision layer is based on industrial Ethernet, and WSN is used in these layers sometimes. Hybrid communication fashion consisting of wired and wireless modes is used in these layers to connect the field and control center. These serve as the fundamental equipment in industrial process automation. Transmitters, and intelligent instruments are included in this layer These devices are interconnected with industrial control systems via various fieldbus, such as Foundation Fieldbus and Profibus conforming to industrial data transmission protocols. The main function of this layer is to connect various field-based sensors and controllers such as intelligent instruments, switches, and valves to the backbone network. The field communication for supervision is via low-speed fieldbus such as FF-H1, while the field communication for control is via high-speed fieldbus such as FF High-Speed Ethernet (HSE) and Profinet
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