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Intermittently-powered bluetooth that works

Conference Paper (2022)
Authors

J. de Winkel (TU Delft - Embedded Systems)

Haozhe Tang (Student TU Delft)

P. Pawełczak (TU Delft - Embedded Systems)

Research Group
Embedded Systems
Copyright
© 2022 J. de Winkel, Haozhe Tang, Przemysław Pawełczak
To reference this document use:
https://doi.org/10.1145/3498361.3538934
More Info
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Publication Year
2022
Language
English
Copyright
© 2022 J. de Winkel, Haozhe Tang, Przemysław Pawełczak
Related content
Research Group
Embedded Systems
Pages (from-to)
287-301
ISBN (electronic)
978-1-4503-9185-6
DOI:
https://doi.org/10.1145/3498361.3538934
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Abstract

We present an architecture for intermittently-powered wireless communication systems that does not require any changes to the official protocol specification. Our core idea is to save the intermediate state of the wireless protocol to non-volatile memory within each connection interval. The protocol state is then deterministically restored at a predefined (harvested energy-dependent) time, which follows the connection interval. As a case study for our architecture, we introduce FreeBie: a battery-free intermittently-powered Bluetooth Low Energy (BLE) mote. To the best of our knowledge FreeBie is the first battery-free active wireless system that sustains bi-directional communication on intermittent harvested energy. The strength of our architecture is articulated by FreeBie consuming at least 9.5 times less power during device inactivity periods than a state-of-the-art BLE device.