Network Calculus using in real-time Industrial Ethernet

Network calculus is a new theory of network QoS which is developed recently, it is the application of the Min-Plus Algebra and Max-Plus Algebra in network analysis. With the aim to resolve the transmitting of the real-time dataflow and get a good performance in dataflow waving,the network calculus theory is applied to the real-time Industrial Ethernet. In the paper,we gained the real-time arrives curve and other service parametersthrough the network calculus of the typical model of the network data stream. Then,we calculate the the largest network delay,the largest service time. According to the results of network calculus, we developed a servicescurve-based strategy for the queue and set up a subsection control model to resolve the rate wobling and other issues in industrial Ethernet, thus ensuring stability of information transmission in the real-time control network. Finally, simulate the algorithm with the NS2 in linux, and analysis of the results to verify its basic performance of real-time transmission and the rate stability.