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    BeamSwitch: System solution for energy-efficient directional communication on mobile devices

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    Author
    Dumanli, Hasan Huseyin
    Date
    2010
    Advisor
    Zhong, Lin
    Degree
    Master of Science
    Abstract
    Directional communication has the potential to improve both the energy efficiency of wireless communication without sacrificing its quality. We present a system solution, BeamSwitch, for directional communication on mobile devices. BeamSwitch employs a special multi-antenna system that consists of multiple identical directional antenna or beams, a single regular omni antenna, and a single RF chain. It uses one of the directional beams for transmitting data frames and receiving their acknowledgments and the regular antenna for all other transceiving. BeamSwitch tracks the signal strength of incoming frames and selects the right beam for data transmission. We report an extensive evaluation of BeamSwitch including both measurements with a prototype with three beams and Qualnet-based simulation. Our evaluation shows that BeamSwitch with three 6 dBi directional antennas can improve the energy efficiency of a commercial 802.11 adapter by over 20% and simultaneously provide better or close communication quality. BeamSwitch achieves this under diverse radio propagation environments and extreme mobility (up to 360° per second direction change).
    Keyword
    Electronics; Electrical engineering
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    • Rice University Electronic Theses and Dissertations [10740]

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    Managed by the Digital Scholarship Services at Fondren Library, Rice University
    Physical Address: 6100 Main Street, Houston, Texas 77005
    Mailing Address: MS-44, P.O.BOX 1892, Houston, Texas 77251-1892