Battery-Aware Task Scheduling for Energy Efficient Mobile Devices

Kun WEI  Wuxiong ZHANG  Yang YANG  Guannan SONG  Zhengming ZHANG  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E97-A   No.9   pp.1971-1974
Publication Date: 2014/09/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E97.A.1971
Type of Manuscript: LETTER
Category: Systems and Control
power optimization,  energy efficiency,  smart phone,  battery-aware,  battery recovery effect,  

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Most of the previous work on power optimization regarded the capacity of battery power as an ideal constant value. In fact, experiments showed that 30% of the total battery capacity was wasted by improper discharge pattern [1]. In this letter, a battery-aware task scheduling protocol which harnesses one of the typical characteristics of batteries, i.e., battery recovery, is proposed to extend usage time for smart phones. The key idea is to adjust the working schedule of the components in smart phones for more energy recovering. Experiments show that when the proposed protocol is applied in an online music application, as much as 9% lifespan extension for batteries can be obtained.