Research Article
Guard Time Optimisation for Energy Efficiency in IEEE 802.15.4-2015 TSCH Links
@INPROCEEDINGS{10.1007/978-3-319-52727-7_8, author={Georgios Papadopoulos and Alexandros Mavromatis and Xenofon Fafoutis and Robert Piechocki and Theo Tryfonas and George Oikonomou}, title={Guard Time Optimisation for Energy Efficiency in IEEE 802.15.4-2015 TSCH Links}, proceedings={Interoperability, Safety and Security in IoT. Second International Conference, InterIoT 2016 and Third International Conference, SaSeIoT 2016, Paris, France, October 26-27, 2016, Revised Selected Papers}, proceedings_a={INTERIOT \& SASEIOT}, year={2017}, month={2}, keywords={Internet of Things IEEE 802.15.4-2015 TSCH Synchronisation Guard time Performance evaluation Energy consumption}, doi={10.1007/978-3-319-52727-7_8} }- Georgios Papadopoulos
Alexandros Mavromatis
Xenofon Fafoutis
Robert Piechocki
Theo Tryfonas
George Oikonomou
Year: 2017
Guard Time Optimisation for Energy Efficiency in IEEE 802.15.4-2015 TSCH Links
INTERIOT & SASEIOT
Springer
DOI: 10.1007/978-3-319-52727-7_8
Abstract
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.