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Impact of Guard Time Length on IEEE 802.15.4e TSCH Energy Consumption

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

Original languageEnglish
Title of host publication2016 13th IEEE International Conference on Sensing, Communication and Networking (SECON 2016)
Subtitle of host publicationProceedings of a meeting held 27-30 June 2016, London, United Kingdom
Publisher or commissioning bodyInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages3
ISBN (Electronic)9781509017324
ISBN (Print)9781509017331
DateAccepted/In press - 3 May 2016
DateE-pub ahead of print - 3 Nov 2016
DatePublished (current) - Dec 2016


The IEEE 802.15.4-2015 standard defines a number of Medium Access Control (MAC) layer protocols for low- power wireless communications in the IoT. Originally defined in the IEEE 802.15.4e amendment, TSCH (Time Slotted Channel Hopping) is among the proposed mechanisms. TSCH is a scheme aiming to guarantee network reliability by keeping nodes time-synchronised at the MAC layer. 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 poster, we investigate the effect of the guard time duration on energy consumption. We identify that, when using the 6tisch minimal schedule, the most significant cause of energy consumption is idle listening during guard time. Therefore, the energy-efficiency of TSCH can be significantly improved by guard time optimisation. Our performance evaluation results, conducted using the Contiki operating system, show that an efficient configuration of guard time may reduce energy consumption by up to 30%, without compromising network reliability.

    Research areas

  • Internet of Things, IEEE 802.15.4-2015, TSCH, Synchronisation, Performance Evaluation, Energy consumption

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  • Full-text PDF (accepted author manuscript)

    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, 333 KB, PDF document


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