Battery-conscious task sequencing for portable devices including voltage/clock scaling

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

39 Scopus citations

Abstract

Operation of battery-powered portable systems can no longer be sustained once a battery becomes discharged. Maximization of the battery lifetime is a difficult task due to nonlinearity of battery behavior that depends on the characteristics of the system load profile. We address the problem of task sequencing without and with voltage/clock scaling that shapes the profile so that the battery lifetime is maximized. We developed an accurate analytical battery model and validated it with measurements taken on a real lithium-ion battery used in a pocket computer. We use the model as a basis for a unique battery-conscious cost function and utilize its properties to develop several novel algorithms, including insertion of recovery periods and voltage/clock scaling for delay slack distribution.

Original languageEnglish (US)
Title of host publicationProceedings - Design Automation Conference
Pages189-194
Number of pages6
StatePublished - 2002
Event39th Annual Design Automation Conference, DAC'02 - New Orleans, LA, United States
Duration: Jun 10 2002Jun 14 2002

Other

Other39th Annual Design Automation Conference, DAC'02
CountryUnited States
CityNew Orleans, LA
Period6/10/026/14/02

Keywords

  • Battery
  • Low-power design
  • Modeling
  • Scheduling
  • Voltage scaling

ASJC Scopus subject areas

  • Hardware and Architecture
  • Control and Systems Engineering

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  • Cite this

    Rakhmatov, D., Vrudhula, S., & Chakrabarti, C. (2002). Battery-conscious task sequencing for portable devices including voltage/clock scaling. In Proceedings - Design Automation Conference (pp. 189-194)