Power supply and consumption co-optimization of portable embedded systems with hybrid power supply

Xue Lin, Yanzhi Wang, Naehyuck Chang, Massoud Pedram

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Energy efficiency has always been an important design criterion for portable embedded systems. To compensate for the shortcomings of electrochemical batteries such as low power density, limited cycle life, and the rate capacity effect, supercapacitors have been employed as complementary power supplies for electrochemical batteries, i.e., hybrid power supplies comprised of batteries and supercapacitors have been proposed. In this work, we consider a portable embedded system with a hybrid power supply and executing periodic real-time tasks. We perform system power management from both the power supply side and the power consumption side to maximize the system service time. Specifically, we use feedback control for maintaining the supercapacitor energy at a certain level by regulating the discharging current of the battery, such that the supercapacitor has the capability to buffer the load current fluctuation. At the power consumption side, we perform task scheduling to assist supercapacitor energy maintenance. Experimental results demonstrate that the proposed joint optimization framework of task scheduling and power supply control successfully prolongs the total service time by up to 57%.

Original languageEnglish (US)
Title of host publication2014 32nd IEEE International Conference on Computer Design, ICCD 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages477-482
Number of pages6
ISBN (Electronic)9781479964925
DOIs
StatePublished - Dec 3 2014
Event32nd IEEE International Conference on Computer Design, ICCD 2014 - Seoul, Korea, Republic of
Duration: Oct 19 2014Oct 22 2014

Publication series

Name2014 32nd IEEE International Conference on Computer Design, ICCD 2014

Other

Other32nd IEEE International Conference on Computer Design, ICCD 2014
CountryKorea, Republic of
CitySeoul
Period10/19/1410/22/14

ASJC Scopus subject areas

  • Computer Graphics and Computer-Aided Design
  • Computer Science Applications

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  • Cite this

    Lin, X., Wang, Y., Chang, N., & Pedram, M. (2014). Power supply and consumption co-optimization of portable embedded systems with hybrid power supply. In 2014 32nd IEEE International Conference on Computer Design, ICCD 2014 (pp. 477-482). [6974722] (2014 32nd IEEE International Conference on Computer Design, ICCD 2014). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICCD.2014.6974722