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

Alexandros Mavromatis, Georgios Papadopoulos, Xenofon Fafoutis, Atis Elsts, George Oikonomou, Theo Tryfonas

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

15 Citations (Scopus)
441 Downloads (Pure)


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.
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
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages3
ISBN (Electronic)9781509017324
ISBN (Print)9781509017331
Publication statusPublished - Dec 2016


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


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