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System-Wide Dynamic Power Management for Portable Multimedia Devices

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2 Author(s)
Linwei Niu ; University of South Carolina, USA ; Gang Quan

Energy reduction is critical to increase the mobility and battery life for today's pervasive portable computing systems. At the same time, energy reduction must be subject to the real-time constraints and quality of service (QoS) requirements for multimedia applications running on many of these systems. This paper presents a novel run-time scheduling approach to reduce the system-wide energy consumption for such systems. In this paper, the multimedia applications are modeled using a popular weakly hard realtime model, i.e., the (m,k)-model. Our experimental results show that, by judiciously scheduling the real-time tasks and shutting down the processor and/or peripheral devices, our approach can lead to significant energy savings while guaranteeing the (m,k) firm deadlines at the same time

Published in:

Eighth IEEE International Symposium on Multimedia (ISM'06)

Date of Conference:

Dec. 2006