Abstract
The Time-Slotted Channel Hopping (TSCH) mode of the IEEE 802.15.4e amendment aims to improve reliability and energy efficiency in industrial and other challenging Internet-of-Things (IoT) environments. This paper presents an accurate and up-to-date energy consumption model for devices using this IEEE 802.15.4e TSCH mode. The model identifies all network-related CPU and radio state changes, thus providing a precise representation of the device behavior and an accurate prediction of its energy consumption. Moreover, energy measurements were performed with a dual-band OpenMote device, running the OpenWSN firmware. This allows the model to be used for devices using 2.4 GHz, as well as 868 MHz. Using these measurements, several network simulations were conducted to observe the TSCH energy consumption effects in end-to-end communication for both frequency bands. Experimental verification of the model shows that it accurately models the consumption for all possible packet sizes and that the calculated consumption on average differs less than 3% from the measured consumption. This deviation includes measurement inaccuracies and the variations of the guard time. As such, the proposed model is very suitable for accurate energy consumption modeling of TSCH networks.
Highlights
The well-known IoT paradigm is comprised numerous devices that connect to the Internet and contribute to world-wide interconnectivity
We propose a novel, more accurate and up-to-date energy consumption model for the IEEE 802.15.4e Time-Slotted Channel Hopping (TSCH) mode
We propose a more accurate energy model for IEEE 802.15.4e TSCH using dual-band
Summary
The well-known IoT paradigm is comprised numerous devices that connect to the Internet and contribute to world-wide interconnectivity. Low energy consumption is generally expected of the connected devices, while at the same time being confronted with challenges such as a low expected manufacturing cost, mobility while being connected and deployment in often difficult-to-reach places. This makes minimizing the energy consumption, while still fulfilling strict reliability demands, one of the major challenges of IoT communications. In TSCH networks, every node follows a time-synchronized schedule. Multiple time slots are grouped into a slot frame, and the size of a slot frame defines the width of the schedule. The number of available frequencies determines the height of the schedule
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