Bandwidth Reservation Analysis for Schedulability of AVB Traffic in TSN

In this paper, we present a bandwidth reservation analysis for Audio-Video Bridging (AVB) traffic in the Time-Sensitive Networking (TSN) standards. The proposed analysis is based on the existing worst-case response-time analysis and can be used to calculate the minimum required bandwidth for guaranteeing the schedulability of messages in AVB classes. The proposed analysis allocates per-link bandwidth to AVB traffic that is sufficient to ensure its schedulability when a combination of the Credit-Based Shaper and Time-Aware Shaper mechanisms are used. We evaluate the proposed analysis using an automotive industrial use case. We evaluate the schedulability of AVB traffic by comparing the proposed analysis with the utilization-based bandwidth reservation as recommended by the TSN standards.