Excelfore adds Time Aware Shaper to Ethernet TSN protocol stack for in-vehicle networks
Excelfore, an enabler of smart mobility networks, has announced a working Time Aware Shaper (TAS) for Ethernet TSN networks.
As in-vehicle networking continues to grow in importance, Ethernet is becoming an increasingly popular platform providing secure, high-speed, inexpensive solutions. To meet automotive requirements for deterministic network behavior, new protocols must be added onto Ethernet stacks to provide audio/video bridging (AVB) and time sensitive networking (TSN) These new protocols enable Ethernet to meet the demands of in-vehicle infotainment, control, and safety systems.
The Excelfore TAS protocols 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 Excelfore TAS has reportedly 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 Excelfore eAVB/TSN protocol stack, including the new TAS, is available for Linux, QNX, Integrity, and Android operating systems, as well as a variety of smaller RTOSs (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.