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Remote Power Control of Wireless Network Interfaces

  • Andrea Acquaviva
  • Tajana Simunic
  • Vinay Deolalikar
  • Sumit Roy
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2799)

Abstract

This paper presents a new power management technique aimed at increasing the energy efficiency of client-server multimedia applications running on wireless portable devices. We focus on reducing the energy consumption of the wireless network interface of the client by allowing the remote server to control the power configuration of the network card depending on the workload. In particular, we exploit server knowledge of the workload to perform an energy-efficient traffic reshaping, without compromising on the quality of service. We tested our methodology on the SmartBadge IV wearable device running an MPEG4 streaming video application. Using our technique we measured energy savings of more than 67% compared to no power management being used on the WLAN interface. In addition, we save as much as 50% of energy with respect to the standard 802.11b power management. All of the energy savings are obtained with no performance loss on the video playback.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • Andrea Acquaviva
    • 1
  • Tajana Simunic
    • 2
  • Vinay Deolalikar
    • 2
  • Sumit Roy
    • 2
  1. 1.Istituto di Scienze e Tecnologie dell’InformazioneUniversita’ di UrbinoItalia
  2. 2.Hewlett-Packard LaboratoriesPalo AltoUSA

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