Deterministic Ethernet for Automotive Applications: Page 2 of 3

March 12, 2015 //By Wilfried Steiner, TTTech
Deterministic Ethernet for Automotive Applications
Ethernet in the car is a reality today but it’s further technological and ecosystem developments will define to which extent it will be used in existing, emerging and future automotive subsystems.

Standardization of Automotive Ethernet is a key enabler to ensure interoperability of products from different vendors. Therefore some important elements of Deterministic Ethernet are the standards developed in the IEEE 802.1 and IEEE 802.3 working groups. The AVB standards and the ongoing TSN standards developed in the IEEE 802.1 and the automotive physical layer standards 100BASE-T1 and 1000BASE-T1 are of particular relevance.
Automotive Ethernet based on IEEE and SAE standards. For full resolution, click here.

AVB has enhanced Ethernet with first real-time capabilities. It is now possible to reserve bandwidth in the switches along a path through a network and end-to-end communication latencies can be calculated, provided the end systems also implement the AVB standards. Furthermore, AVB has also standardized IEEE 802.1AS, a clock synchronization protocol similar to IEEE 1588, which allows the nodes in the network to synchronize their local clocks. With TSN, the IEEE 802.1 standards further develop Ethernet’s real-time capabilities by standardizing a time-triggered communication as well as Ethernet frame preemption.

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