Hierarchical traffic scheduling method for hybrid constraint time sensitive network (TSN)

Abstract

The invention discloses a hybrid constraint time-sensitive network (TSN) hierarchical traffic scheduling method, which comprises the following steps of: dividing a whole factory network into a field level, a workshop level and a factory level from bottom to top, and setting different constraint conditions for intra-level transmission tasks and inter-level transmission tasks, in the invention, the traditional time-sensitive network timetable calculation is updated, and the feasible solution space of the timetable is increased due to the relatively loose constraint after improvement, so that the utilization rate of the switch queue is reduced, the number of available queues of the BE flow is increased, and the time-sensitive network timetable calculation efficiency is improved. Therefore, the overall utilization rate and throughput of the network are increased, and the time table calculation complexity is reduced.

Description

technical field [0001] The invention relates to the technical field of Ethernet, in particular to a time-sensitive network (TSN) hierarchical traffic scheduling method with mixed constraints. Background technique [0002] In recent years, Time Sensitive Networking (TSN) technology, as a new generation of Ethernet technology, has precise traffic scheduling capabilities due to its standard Ethernet architecture, which can ensure high-quality transmission of multiple business traffic on the common network. The cost advantage has become the first choice for the industrial Internet and is widely used in factory networks. [0003] Time-sensitive networking provides a set of time-sensitive mechanisms for the MAC layer protocol of Ethernet, which not only ensures the time determinism of Ethernet data communication, but also retains the possibility of communication between different protocol networks. In the field of industrial Internet, the main task of time-sensitive network is to...

AI Technical Summary

Problems solved by technology

Factory time-sensitive network traffic can be subdivided into intra-stage transmission traffic and inter-stage transmission traffic. They can be judged by whether the flow passes through the inter-stage edge switch. Traditional time-sensitive network traffic scheduling methods do not pay attention to intra-stage transmission tasks. Using the same constraint to calculate the timetable of the entire network, which is different from the transmission tasks between the stages, can not make the resources of the entire network be used reasonably, and at the same time lacks flexibility

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