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Rethinking Power Efficiency for Next-Generation Processor-Free Sensing Devices

The last decade has seen significant advances in power optimization for IoT sensors. The conventional wisdom considers that if we reduce the power consumption of each component (e.g., processor, radio) into [Formula: see text] W-level of power, the IoT sensors could achieve overall ultra-low power c...

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Detalles Bibliográficos
Autores principales: Song, Yihang, Li, Songfan, Zhang, Chong, Li, Shengyu, Lu, Li
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9031977/
https://www.ncbi.nlm.nih.gov/pubmed/35459059
http://dx.doi.org/10.3390/s22083074
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author Song, Yihang
Li, Songfan
Zhang, Chong
Li, Shengyu
Lu, Li
author_facet Song, Yihang
Li, Songfan
Zhang, Chong
Li, Shengyu
Lu, Li
author_sort Song, Yihang
collection PubMed
description The last decade has seen significant advances in power optimization for IoT sensors. The conventional wisdom considers that if we reduce the power consumption of each component (e.g., processor, radio) into [Formula: see text] W-level of power, the IoT sensors could achieve overall ultra-low power consumption. However, we show that this conventional wisdom is overturned, as bus communication can take significant power for exchanging data between each component. In this paper, we analyze the power efficiency of bus communication and ask whether it is possible to reduce the power consumption for bus communication. We observe that existing bus architectures in mainstream IoT devices can be classified into either push-pull or open-drain architecture. push-pull only adapts to unidirectional communication, whereas open-drain inherently fits for bidirectional communication which benefits simplifying bus topology and reducing hardware costs. However, open-drain consumes more power than push-pull due to the high leakage current consumption while communicating on the bus. We present Turbo, a novel approach introducing low power to the open-drain based buses by reducing the leakage current created on the bus. We instantiate Turbo on I [Formula: see text] C bus and evaluate it with commercial off-the-shelf (COTS) sensors. The results show a [Formula: see text] improvement in power efficiency in I [Formula: see text] C communication.
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spelling pubmed-90319772022-04-23 Rethinking Power Efficiency for Next-Generation Processor-Free Sensing Devices Song, Yihang Li, Songfan Zhang, Chong Li, Shengyu Lu, Li Sensors (Basel) Article The last decade has seen significant advances in power optimization for IoT sensors. The conventional wisdom considers that if we reduce the power consumption of each component (e.g., processor, radio) into [Formula: see text] W-level of power, the IoT sensors could achieve overall ultra-low power consumption. However, we show that this conventional wisdom is overturned, as bus communication can take significant power for exchanging data between each component. In this paper, we analyze the power efficiency of bus communication and ask whether it is possible to reduce the power consumption for bus communication. We observe that existing bus architectures in mainstream IoT devices can be classified into either push-pull or open-drain architecture. push-pull only adapts to unidirectional communication, whereas open-drain inherently fits for bidirectional communication which benefits simplifying bus topology and reducing hardware costs. However, open-drain consumes more power than push-pull due to the high leakage current consumption while communicating on the bus. We present Turbo, a novel approach introducing low power to the open-drain based buses by reducing the leakage current created on the bus. We instantiate Turbo on I [Formula: see text] C bus and evaluate it with commercial off-the-shelf (COTS) sensors. The results show a [Formula: see text] improvement in power efficiency in I [Formula: see text] C communication. MDPI 2022-04-16 /pmc/articles/PMC9031977/ /pubmed/35459059 http://dx.doi.org/10.3390/s22083074 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Song, Yihang
Li, Songfan
Zhang, Chong
Li, Shengyu
Lu, Li
Rethinking Power Efficiency for Next-Generation Processor-Free Sensing Devices
title Rethinking Power Efficiency for Next-Generation Processor-Free Sensing Devices
title_full Rethinking Power Efficiency for Next-Generation Processor-Free Sensing Devices
title_fullStr Rethinking Power Efficiency for Next-Generation Processor-Free Sensing Devices
title_full_unstemmed Rethinking Power Efficiency for Next-Generation Processor-Free Sensing Devices
title_short Rethinking Power Efficiency for Next-Generation Processor-Free Sensing Devices
title_sort rethinking power efficiency for next-generation processor-free sensing devices
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9031977/
https://www.ncbi.nlm.nih.gov/pubmed/35459059
http://dx.doi.org/10.3390/s22083074
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