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TAS enhances Ethernet TSN protocol stack for in-vehicle networks


EXCELFORE Working Time Aware Shaper (TAS) protocols for Ethernet TSN networks reside in network talkers and bridges with support for TSN enhancements including IEEE 802.1Qbv and 802.1Qci. The TAS provides a circuit-switched/ Time-Division-Multiplexed (TDM) channel into the otherwise packet-based Ethernet network. This enables a specific time window to be guaranteed for the delivery of high priority traffic, for example for automotive control systems.

The TAS has demonstrated the ability to reduce the variance in measured propagation delays by more than 65% compared to Ethernet traffic without the TAS, ensuring deterministic sub-100 microsecond accuracy for time-sensitive traffic. The eAVB/TSN protocol stack, including the TAS, is available for Linux, QNX, Integrity, and Android operating systems, as well as a variety of smaller real-time operating systems. It is already running in cameras, video displays, head units, ECUs, and network gateways that bridge to CAN, LIN, and other popular automotive busses. 


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