Reliability-aware routing of AVB streams in TSN networks

Abstract

Modern cars integrate a large number of functionalities with high bandwidth, real-time, and reliability requirements. Time-Sensitive Networking (TSN) standards provide the network specifications to meet the timing requirements for many of these safety-critical functionalities. For instance, TSN standards guarantee maximum jitter of 2 ms for AVB streams over up to 7 hops. In this paper, we investigate the problem of meeting the required transmission reliability of Audio Video Bridging (AVB) streams in TSN networks under transient errors using temporal redundancy approach. An ILP-based routing technique that determines the path and number of replicas for each AVB stream to meet the minimum reliability requirement for each stream as well as maximize the overall network reliability. The Mean Time To Detected Error (MTTDE) is used to measure the transmission reliability. Results show that, the proposed approach is capable of finding feasible routing solutions with up to 50% less bandwidth compared to typical approaches as well as it achieves higher MTTDE by 10-folds comparing to the non-optimized solutions.