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Guard time optimisation and adaptation for energy efficient multi-hop TSCH networks

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Original languageEnglish
Title of host publication2016 IEEE 3rd World Forum on Internet of Things (WF-IoT 2016)
Subtitle of host publicationProceedings of a meeting held 12-14 December 2016, Reston, Virginia, USA
Publisher or commissioning bodyInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages6
ISBN (Print)9781509041312
DateAccepted/In press - 3 Oct 2016
DateE-pub ahead of print - 9 Feb 2017
DatePublished (current) - Mar 2017
Event3rd IEEE World Forum on Internet of Things - Reston, VA, United States
Duration: 12 Dec 201614 Dec 2016


Conference3rd IEEE World Forum on Internet of Things
Abbreviated titleWF-IoT 2016
CountryUnited States
CityReston, VA


In the IEEE 802.15.4-2015 standard, Time Slotted Channel Hopping (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 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 first perform mathematical modelling on a TSCH link to identify the guard time that maximises the energy-efficiency of the TSCH network in single hop topology. We then continue in multi-hop network, where we empirically adapt the guard time locally at each node depending its distance, in terms of hops, from the sink. Our performance evaluation results, conducted using the Contiki OS, demonstrate that the proposed decentralised guard time adaptation can reduce the energy consumption by up to 40%, without compromising network reliability.

    Structured keywords

  • Digital Health

    Research areas

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


3rd IEEE World Forum on Internet of Things

Abbreviated titleWF-IoT 2016
Duration12 Dec 201614 Dec 2016
CityReston, VA
CountryUnited States
Degree of recognitionInternational event

Event: Conference

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    Rights statement: This is the author accepted manuscript (AAM). The final published version (version of record) is available online via IEEE at . Please refer to any applicable terms of use of the publisher.

    Accepted author manuscript, 466 KB, PDF document


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