Foundations of High Speed ISOBUS

The ISO 11783‑based ISOBUS standard has enabled tractor–implement communication for two decades, but its 250 kbaud CAN backbone limits real‑time data exchange. Higher bandwidth and deterministic latency are required to support electric drives, precision guidance, imaging, and other advanced functions. This article surveys the evolution, explores industrial Ethernet options such as 1000BASE‑T1, dual‑stack designs, and middleware like OPC UA, DDS, and SOME/IP for real‑time control and high‑rate data. Prototyping revealed trade‑offs in latency, scalability, connector design, and cross‑domain compatibility. Horizontal alignment under ISO JWG16 seeks to harmonise physical layers across agriculture, forestry, mining, construction, and road‑truck sectors. The paper synthesises these findings that balances performance, interoperability, and practical deployment.