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Application Characterization for Wireless Network Power Management

Weißel, Andreas; Faerber, Matthias; Bellosa, Frank

Abstract:

The popular IEEE 802.11 standard defines a power saving mode that keeps the network interface in a low power sleep state and periodically powers it up to synchronize with the base station. The length of the sleep interval, the so called beacon period, affects two dimensions, namely application performance and energy consumption. The main disadvantage of this power saving policy lies in its static nature: a short beacon period wastes energy due to frequent activations of the interface while a long beacon period can cause diminished application responsiveness and performance. While the first aspect, reduction of power consumption, has been studied extensively, the implications on application performance have received only little attention. We argue that the tolerable reduction of performance or quality depends on the application and the user. As an example, a beacon period of only 100ms slows down RPC-based operations like NFS dramatically, while the user will probably not recognize the additional delay when using a web browser. If at all, known power management algorithms guarantee a system wide limit on performance degradation without differentiating between different application profiles.
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Volltext §
DOI: 10.5445/IR/1000002575
Cover der Publikation
Zugehörige Institution(en) am KIT Fakultät für Informatik – Institut für Betriebs- und Dialogsysteme (IBDS)
Publikationstyp Buchaufsatz
Publikationsjahr 2004
Sprache Englisch
Identifikator ISBN: 3-540-21238-8
urn:nbn:de:swb:90-25755
KITopen-ID: 1000002575
Erschienen in Organic and pervasive computing - ARCS 2004. Hrsg.: Ch. Müller-Schloer
Verlag Springer Verlag
Seiten 231-245
Serie Lecture notes in computer science ; 2981
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
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