Ein Angebot des JRZ ISIA
Die Reading Group hat den Charakter eines lockeren Fachseminars mit Vorträgen einer Länge zwischen 30 und 45 Minuten und anschließender Diskussion. In freundlicher Atmosphäre und unter weitestgehender Themenfreiheit werden etwa Forschungsergebnisse, wissenschaftliche oder technologische Überblicksvorträge oder die Aufbereitung einer Forschungsfrage präsentiert und diskutiert. Der Fokus liegt im Austausch, in der Diskussion. Organisatorische Fragen, Anmeldungen zu Vorträgen oder Vortragsvorschläge bitte an Stefan Huber richten.
Termine 2025
Mittwoch, 22.01.2025 | Silviu Craciunas (TTTech)
TSN and industrial automation
Time-Sensitive Networking (TSN) encompasses a series of amendments and protocols that upgrade IEEE 802.1Q Ethernet with real-time functions, including time synchronization, preemption, fault tolerance, and scheduled traffic. These enhancements render TSN highly beneficial and appealing across diverse fields with varying demands, ranging from industrial automation, where scalability and extensibility are critical, to automotive and driver assistance systems, where cost and flexibility are paramount. For scenarios with rigorous timing criteria, safety-critical scheduled traffic (ST) can be prioritized and ensured alongside best-effort (BE) traffic within the same multi-hop switched Ethernet network. The primary TSN mechanism that allows ST traffic to achieve guaranteed latency bounds and jitter while being isolated from other types of communication is the Time-Aware Shaper (IEEE 802.1Qbv) mechanism in combination with a clock synchronization protocol (IEEE 802.1As-rev) providing a common notion of time.
However, this variety comes with challenges, as there is no definitive guide on which mechanisms or combinations to apply in specific application domains or for particular requirements. Some combinations of mechanisms yield minimal benefits, while others are more intuitive choices. Furthermore, although individual mechanisms are straightforward, understanding their interactions remains under-researched. Moreover, the complexity of the configuration space adds another layer of difficulty. While some mechanisms are simple to configure, others may pose significant computational challenges (such as the schedule synthesis for IEEE 802.1Qbv) and may not be suitable for real-time applications in dynamic settings like industrial automation. Therefore, the intricacies of creating configurations are a critical aspect to consider.
In this talk, we will look at the end-to-end scheduling problem within TSN, its complexity, its relation to task scheduling, and the applicability of different mechanisms to various domains. Moreover, we will discuss industry acceptance of TSN; more specifically, how to enable faster and safer adoption of TSN into more conservative domains by addressing the configuration problem.
Silviu S. Craciunas is a principal scientist at TTTech Computertechnik AG, Vienna. He received his Ph.D. from the University of Salzburg, Austria, and before joining TTTech, he was a senior researcher at the Embedded Software & Systems Research Center (SRC). His research interests include real-time and safety-critical distributed systems, real-time scheduling algorithms, and deterministic (time-triggered) networks. Most of his research work is currently centred around designing and evaluating new methods and algorithms to solve complex large-scale scheduling problems in multi-core multi-SoC platforms, spanning both the application and network domains. He received the Best Paper Award from RTNS in 2014, an Outstanding Paper Award from RTNS 2022, the "Emerging Technologies" Best Paper Award from ETFA in 2020, as well as an Outstanding Paper Award at RTAS 2024.
If you want to join, please send an email to Stefan Huber.