Bibliograph. Daten | Egger, Simon: Adaptive robust scheduling in wireless Time-Sensitive Networks (TSN). Universität Stuttgart, Fakultät Informatik, Elektrotechnik und Informationstechnik, Masterarbeit Nr. 51 (2024). 83 Seiten, englisch.
|
| Kurzfassung | The correct operation of upper-layer services is unattainable in wireless Time-Sensitive Networks (TSN) if the schedule cannot provide formal reliability guarantees to each stream. Still, current TSN scheduling literature leaves reliability, let alone provable reliability, either poorly quantified or entirely unaddressed. This work aims to remedy this shortcoming by designing an adaptive mechanism to compute robust schedules. For static wireless channels, robust schedules enforce the streams' reliability requirements by allocating sufficiently large wireless transmission intervals and by isolating omission faults. While robustness against omission faults is conventionally achieved by strictly isolating each transmission, we show that controlled interleaving of wireless streams is crucial for finding eligible schedules. We adapt the Disjunctive Graph Model (DGM) from job-shop scheduling to design TSN-DGM as a metaheuristic scheduler that can schedule up to one hundred wireless streams with fifty cross-traffic streams in under five minutes. In comparison, we demonstrate that strict transmission isolation already prohibits scheduling a few wireless streams. For dynamic wireless channels, we introduce shuffle graphs as a linear-time adaptation strategy that converts reliability surpluses from improving wireless links into slack and reliability impairments from degrading wireless links into tardiness. While TSN-DGM is able to improve the adapted schedule considerably within ten seconds of reactive rescheduling, we justify that the reliability contracts between upper-layer services and the infrastructure provider should specify a worst-case channel degradation beyond which no punctuality guarantees can be made.
|
Volltext und andere Links | Volltext
|
| Abteilung(en) | Universität Stuttgart, Institut für Parallele und Verteilte Systeme, Verteilte Systeme
|
| Betreuer | Becker, Prof. Christian; Dürr, Dr. Frank; Haug, Lucas |
| Eingabedatum | 3. Dezember 2024 |
|---|