AVB-aware Routing and Scheduling for Critical Traffic in Time-sensitive Networks with Preemption
Aldin Berisa, Luxi Zhao, Silviu S. Craciunas, Mohammad Ashjaei, Saad Mubeen, Masoud Daneshtalab, Mikael Sjödin
Abstract
The Time-Sensitive Network (TSN) amendments and protocols add capabilities on top of standard 802.1 Ethernet for guaranteeing the timeliness of both (isochronous) scheduled traffic (ST) and shaped (audio-video) communication (AVB) in distributed applications. ST streams are guaranteed via an offline computed schedule controlling the time-aware gate mechanism of IEEE 802.1Qbv, while AVB real-time streams are shaped via a credit-based shaper (CBS) and scheduler with lower-priority than ST. Although the two traffic classes use different TSN mechanisms, they are interrelated as the ST traffic class schedule influences the latency of AVB traffic.