Title :
Battery-driven dynamic power management of portable systems
Author :
Benini, Luca ; Castelli, Giuliano ; Macii, Alberto ; Macii, Enrico ; Scarai, R.
Author_Institution :
Dipartimento di Elettronica Inf. e Sistemistica, Bologna Univ., Italy
Abstract :
Battery life-time extension is a primary design objective for portable systems. Traditionally, battery life-time has been prolonged mainly by reducing average power consumption of system components. A careful analysis of discharge characteristics and the adoption of accurate high-level battery models in system-level design open new opportunities for life-time extension. We introduce dynamic power management (DPM) policies specifically tailored to battery-powered systems. Battery-driven DPM strives to enhance life-time by automatically adapting discharge rate and current profiles to battery state-of-charge. The distinctive feature of these policies is the control of system operation based on the observation of battery output voltage. The effectiveness of the proposed policies and, more in general, of the idea of accounting for battery behavior during system design, is proved by the experiments carried out on a realistic case study, namely, an MP3 audio player
Keywords :
cells (electric); computer power supplies; operating systems (computers); portable computers; MP3 audio player; battery life-time extension; battery output voltage; battery state-of-charge; battery-driven dynamic power management; discharge rate; experiments; portable computers; power consumption; system-level design; Battery management systems; Control systems; Digital audio players; Energy consumption; Energy management; Open loop systems; Power system management; Power system modeling; System-level design; Voltage control;
Conference_Titel :
System Synthesis, 2000. Proceedings. The 13th International Symposium on
Conference_Location :
Madrid
Print_ISBN :
0-7695-0765-4
DOI :
10.1109/ISSS.2000.874025
