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Micro power management of active 802.11 interfaces

Published: 17 June 2008 Publication History

Abstract

Wireless interfaces are major power consumers on mobile systems. Considerable research has improved the energy efficiency of elongated idle periods or created more elongated idle periods in wireless interfaces, often requiring cooperation from applications or the network infrastructure. With increasing wireless mobile data, it has become critical to improve the energy efficiency of active wireless interfaces. In this work, we present micro power management (μPM), a solution inspired by the mismatch between the high performance of state-of-the-art 802.11 interfaces and the modest data rate requirements by many popular network applications. μPM enables an 802.11 interface to enter unreachable power-saving modes even between MAC frames, without noticeable impact on the traffic flow. To control data loss, μPM leverages the retransmission mechanism in 802.11 and controls frame delay to adapt to demanded network throughput with minimal cooperation from the access point. Based on a theoretical framework, we employ simulation to systematically investigate an effective and efficient implementation of μPM. We have built a prototype μPM on an open-access wireless hardware platform. Measurements show that more than 30% power reduction for the wireless transceiver can be achieved with μPM for various applications without perceptible quality degradation.

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cover image ACM Conferences
MobiSys '08: Proceedings of the 6th international conference on Mobile systems, applications, and services
June 2008
304 pages
ISBN:9781605581392
DOI:10.1145/1378600
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Published: 17 June 2008

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Author Tags

  1. 802.11
  2. energy-efficient wireless
  3. power management

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  • (2022)Realizing Emotional Interactions to Learn User Experience and Guide Energy Optimization for Mobile ArchitecturesProceedings of the 55th Annual IEEE/ACM International Symposium on Microarchitecture10.1109/MICRO56248.2022.00064(868-884)Online publication date: 1-Oct-2022
  • (2022)Using Psychophysics to Guide Power Adaptation for Input Methods on Mobile Architectures2022 IEEE International Symposium on High-Performance Computer Architecture (HPCA)10.1109/HPCA53966.2022.00045(514-527)Online publication date: Apr-2022
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