Guard Time Optimisation for Energy Efficiency in IEEE 802.15.4-2015 TSCH Links

Georgios Papadopoulos, Alexandros Mavromatis, Xenofon Fafoutis, Robert Piechocki, Theo Tryfonas, George Oikonomou

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

6 Citations (Scopus)
282 Downloads (Pure)


Time Slotted Channel Hopping (TSCH) is among the Medium Access Control (MAC) schemes defined in the IEEE 802.15.4-2015 standard. TSCH aims to guarantee high-level network reliability by keeping nodes time-synchronised. In order to ensure successful communication between a sender and a receiver, the latter starts listening shortly before the expected time of a MAC layer frame’s arrival. The offset between the time a node starts listening and the estimated time of frame arrival is called guard time and it aims to reduce the probability of missed frames due to clock drift. In this paper, we investigate the impact of the guard time length on network performance. We identify that, when using the 6TiSCH minimal schedule, the most significant cause of energy consumption is idle listening during guard time. Therefore, we perform empirical optimisations on the guard time to maximise the energy-efficiency of a TSCH link. Our experiments, conducted using the Contiki OS, show that optimal guard time configuration can reduce energy consumption by up to 40%, without compromising network reliability.
Original languageEnglish
Title of host publicationInteroperability, Safety and Security in IoT
Subtitle of host publicationSecond International Conference, InterIoT 2016 and Third International Conference, SaSeIoT 2016, Paris, France, October 26-27, 2016, Revised Selected Papers
Number of pages8
ISBN (Electronic)9783319527277
ISBN (Print)9783319527260
Publication statusPublished - 11 Mar 2017

Publication series

NameLecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering
PublisherSpringer International Publishing
ISSN (Print)1867-8211


  • Internet of Things
  • IEEE 802.15.4-2015
  • TSCH
  • Synchronisation
  • Guard Time
  • Performance Evaluation
  • Energy Consumption


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