Isochronous Deterministic Ethernet System Research

Distributed control systems based on real-time Ethernet have been widely used in rail transit and other industrial fields. Currently, switched Ethernet has switching queuing delay, which limits the application scope of real-time Ethernet. In addressing this issue, this paper proposes an Isochronous Deterministic Ethernet (IDE) technology based on precise clock synchronization and deterministic scheduling. This technology ensures strict determinism in end-to-end communication latency on Ethernet networks. The paper presents the principles of Isochronous Deterministic Ethernet and conducts system simulations. Simulation results indicate that the end-to-end latency jitter for deterministic communication is less than 2 μs. Furthermore, the paper describes the performance metrics of the technology prototype and compares them with the results of current prototype testing.