Low-Power Synchronization for Multi-IMU WSNs
Jona Cappelle, Sarah Goossens, Lieven De Strycker, Liesbet Van der, Perre

TL;DR
This paper introduces a low-power wireless synchronization method for multi-IMU sensor networks, balancing energy efficiency with synchronization accuracy suitable for healthcare applications.
Contribution
It presents a novel low-power synchronization approach that achieves sub-microsecond accuracy with minimal energy consumption in multi-IMU wireless sensor networks.
Findings
Achieves sub 1 microsecond synchronization accuracy with 74.8 J/h energy.
Provides a power-optimized implementation with 200 microsecond accuracy and 198 mJ/h energy.
Demonstrates suitability for healthcare-related multi-IMU applications.
Abstract
Wireless time synchronization is one of the most important services in a Wireless Sensor Network (WSN). Inertial Measurement Units (IMUs) are often used in these WSNs in healthcare-related treatments. We present a low-power, wirelessly synchronized multi-IMU platform. The proposed approach synchronously captures packets from different IMUs and transmits the data over Bluetooth Low Energy (BLE) to a central Data Capturing Unit (DCU). The contribution of this work is, rather than focussing on the highest possible accuracy, to provide a low-power accurate enough solution for use in a multi-IMU WSN. We examine key factors affecting synchronization accuracy and elaborate on the implementation challenges. An accuracy of sub 1 us can be achieved with the approach using 74.8 J/h of energy, while a power-optimized implementation is presented with an accuracy of 200 us and an energy consumption…
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Taxonomy
TopicsNetwork Time Synchronization Technologies · Environmental Monitoring and Data Management · Bluetooth and Wireless Communication Technologies
