EDF Scheduling and Minimal-Overlap Shortest-Path Routing for Real-Time TSCH Networks

Miguel Gutiérrez Gaitán, Luís Almeida, Pedro Miguel Santos, Patrick Meumeu Yomsi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

With the scope of Industry 4.0 and the Industrial Internet of Things (IIoT), wireless technologies have gained momentum in the industrial realm. Wireless standards such as WirelessHART, ISA100.11a, IEEE 802.15.4e and 6TiSCH are among the most popular, given their suitability to support real-time data traffic in wireless sensor and actuator networks (WSAN). Theoretical and empirical studies have covered prioritized packet scheduling in extenso, but only little has been done concerning methods that enhance and/or guarantee real-time performance based on routing decisions. In this work, we propose a greedy heuristic to reduce overlap in shortest-path routing for WSANs with packet transmissions scheduled under the earliest-deadline-first (EDF) policy. We evaluated our approach under varying network configurations and observed remarkable dominance in terms of the number of overlaps, transmission conflicts, and schedulability, regardless of the network workload and connectivity. We further observe that well-known graph network parameters, e.g., vertex degree, density, betweenness centrality, etc., have a special influence on the path overlaps, and thus provide useful insights to improve the real-time performance of the network.

Original languageEnglish
Title of host publication2nd Workshop on Next Generation Real-Time Embedded Systems, NG-RES 2021
EditorsMarko Bertogna, Federico Terraneo
PublisherSchloss Dagstuhl- Leibniz-Zentrum fur Informatik GmbH, Dagstuhl Publishing
ISBN (Electronic)9783959771788
DOIs
Publication statusPublished - 1 Jan 2021
Event2nd Workshop on Next Generation Real-Time Embedded Systems, NG-RES 2021 - Virtual, Budapest, Hungary
Duration: 20 Jan 2021 → …

Publication series

NameOpenAccess Series in Informatics
Volume87
ISSN (Print)2190-6807

Conference

Conference2nd Workshop on Next Generation Real-Time Embedded Systems, NG-RES 2021
Country/TerritoryHungary
CityVirtual, Budapest
Period20/01/21 → …

Keywords

  • Real-time communication
  • Routing
  • Scheduling
  • Tdma
  • Wireless networks

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Modelling and Simulation

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