2026-07-29T10:45:17Z https://drops.dagstuhl.de/oai

oai:drops-oai.dagstuhl.de:13478 2024-03-06T10:31:11Z ddc:004 open_access

EDF Scheduling and Minimal-Overlap Shortest-Path Routing for Real-Time TSCH Networks Gaitán, Miguel Gutiérrez Almeida, Luís Santos, Pedro Miguel Yomsi, Patrick Meumeu Real-time communication Routing Scheduling TDMA Wireless networks 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. Schloss Dagstuhl – Leibniz-Zentrum für Informatik Miguel Gutiérrez Gaitán and Luís Almeida and Pedro Miguel Santos and Patrick Meumeu Yomsi 2021 Is Part Of OASIcs, Volume 87, Second Workshop on Next Generation Real-Time Embedded Systems (NG-RES 2021) InProceedings Text doc-type:ResearchArticle publishedVersion application/pdf doi:10.4230/OASIcs.NG-RES.2021.2 urn:nbn:de:0030-drops-134786 https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.NG-RES.2021.2 eng https://creativecommons.org/licenses/by/3.0/legalcode