Data networks with fibre optic connections are already widely used at home or in the office if high data transmission speeds are required. In the automotive sector, however, fibre optic technology is only just on the verge of a breakthrough. The technology group ZF has further developed its high-performance computer ProAI for optical multi-gigabit Ethernet in automotive applications on this future path. With newly developed chips and connectors, data can be transmitted via automotive-grade optical fibres in accordance with the IEEE 802.3cz standard.
Speed of light in vehicle electrical systems
Glass fibre in the car offers numerous advantages. The technology allows ranges of up to 40 metres and enables communication between control units in real time.
Key advantages at a glance:
High data rates: Transmission at up to 50 Gbit/s for ADAS, IVI and more
Long range: Up to 40 metres via fibre optic cable
Weight advantage: Less mass than copper cables
Reliability: Insensitive to interference
Energy efficiency: Lower power consumption, longer service life
Scalability: Future-proof infrastructure without rewiring
Cost savings: High quantities reduce manufacturing costs
Optimised communication: Lower latency, simple physical layer
Optical data transmission works by means of light signals in glass or plastic fibres. Thanks to total reflection, the light remains in the core of the fibre, which enables high bandwidths with minimal loss. This is a major advantage over copper cables, especially in vehicles.
History and development in the automotive industry
The automotive industry was already using optical data connections 20 years ago with the MOST system. The new standards such as IEEE 802.3cz are now based on high-performance fibre optics that can handle significantly higher data volumes. They are suitable for all vehicle types — from cars to shuttle buses.
Possible applications and future prospects
The automotive industry is on the cusp of complete digitalisation. Systems for autonomous driving, infotainment and vehicle-to-vehicle communication require reliable, fast data connections. Optical multi-gigabit Ethernet in the car is the ideal solution for this — scalable, robust and economical.
