A Case for Battery Charging-Aware Power Management and Deferrable Task Scheduling in Smartphones [Conference Paper]

NESL Technical Report #: 2014-9-1


Abstract: Prior battery-aware systems research has focused on discharge management in order to maximize the usable battery lifetime of a device. In order to achieve the vision of perpetual mobile device operation, we propose that software also needs to carefully consider the process of battery charging. This is because the power consumed by the system when plugged in can influence the rate of battery charging, and hence, the availability of the system to the user. We characterize the charging process of a Nexus 4 smartphone and analyze the charging behaviors of anonymous Nexus 4 users using the Device Analyzer dataset. We find that there is potential for software scheduler to increase device availability by distributing tasks across the charging period. Accordingly, we propose new threads of research in charging-aware power management and deferrable task scheduling that could improve overall availability for a significant portion of smartphone users. We observe that there is potential of 18.9% energy gain for the battery while charging for approximately 53% of the users we examined.

External paper URL

Publication Forum: HotPower'14

Date: 2014-10-01

Publisher: USENIX

Public Document?: Yes

NESL Document?: Yes

Document category: Conference Paper

Primary Research Area: Power-aware Computing and Communications