Research of Real-Time Deterministic Ethernet in Launch Vehicle

The demands of mass data transmission, intelligent test and fast launching technology requires the backbone communication network of the launch vehicle to be scalable and flexible. By improving the link layer and application layer protocols in the commercial Ethernet transmission process, a real-time deterministic network based on high-precision clock synchronization is proposed to meet the working requirements of the on-board control system and telemetry system. The simulation results verify the correctness and feasibility of the real-time deterministic Ethernet for spacecraft. The method provides support for engineering practice.