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Journal article
Hibernus plus plus : A Self-Calibrating and Adaptive System for Transiently-Powered Embedded Devices
IEEE transactions on computer-aided design of integrated circuits and systems, v 35(12), pp 1968-1980
01 Dec 2016
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Energy harvesters are being used to power autonomous systems, but their output power is variable and intermittent. To sustain computation, these systems integrate batteries or supercapacitors to smooth out rapid changes in harvester output. Energy storage devices require time for charging and increase the size, mass, and cost of systems. The field of transient computing moves away from this approach, by powering the system directly from the harvester output. To prevent an application from having to restart computation after a power outage, approaches such as Hibernus allow these systems to hibernate when supply failure is imminent. When the supply reaches the operating threshold, the last saved state is restored and the operation is continued from the point it was interrupted. This paper proposes Hibernus++ to intelligently adapt the hibernate and restore thresholds in response to source dynamics and system load properties. Specifically, capabilities are built into the system to autonomously characterize the hardware platform and its performance during hibernation in order to set the hibernation threshold at a point which minimizes wasted energy and maximizes computation time. Similarly, the system auto-calibrates the restore threshold depending on the balance of energy supply and consumption in order to maximize computation time. Hibernus++ is validated both theoretically and experimentally on microcontroller hardware using both synthesized and real energy harvesters. Results show that Hibernus++ provides an average 16% reduction in energy consumption and an improvement of 17% in application execution time over state-of-the-art approaches.
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Details
- Title
- Hibernus plus plus : A Self-Calibrating and Adaptive System for Transiently-Powered Embedded Devices
- Creators
- Domenico Balsamo - University of SouthamptonAlex S. Weddell - University of SouthamptonAnup Das - University of SouthamptonAlberto Rodriguez Arreola - University of SouthamptonDavide Brunelli - University of TrentoBashir M. Al-Hashimi - University of SouthamptonGeoff V. Merrett - University of SouthamptonLuca Benini - Laboratori Guglielmo Marconi
- Publication Details
- IEEE transactions on computer-aided design of integrated circuits and systems, v 35(12), pp 1968-1980
- Publisher
- IEEE
- Number of pages
- 13
- Grant note
- Telecom Italia s.p.a. Ph.D. Grant CA 318013 / PHIDIAS (EU) EP/K034448/1 / EPSRC; UK Research & Innovation (UKRI); Engineering & Physical Sciences Research Council (EPSRC) EP/L000563/1; EP/K034448/1 / Engineering and Physical Sciences Research Council; UK Research & Innovation (UKRI); Engineering & Physical Sciences Research Council (EPSRC)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Electrical and Computer Engineering
- Web of Science ID
- WOS:000388960900010
- Scopus ID
- 2-s2.0-84999274058
- Other Identifier
- 991019295304404721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Computer Science, Hardware & Architecture
- Computer Science, Interdisciplinary Applications
- Engineering, Electrical & Electronic