Impact of Slotframe Length on End-to-End Delay in IEEE 802.15.4 TSCH Network

IEEE 802.15.4 Time Slotted Channel Hopping (TSCH) is designed to provide high reliability and predictable time delay for industrial applications that require strict preconditions. IEEE 802.15.4 TSCH operates on the slotframe structure consisting of multiple slotOffsets and channelOffsets. However, the IEEE 802.15.4-2015 standard does not specify how to determine the slotframe length. Thus, the inappropriate slotframe length can cause a long end-to-end delay in industrial applications. Therefore, in this paper, we analyze the impact of the slotframe length on the end-to-end delay performance in IEEE 802.15.4 TSCH network. The results of the analysis can be used as the guideline that determines the appropriate slotframe length for various industrial applications.