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    Time synchronization and system support for energy efficient wireless sensor networks

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    Author
    Lewis, Oldrine George
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    URI
    http://hdl.handle.net/11122/6835
    Abstract
    This thesis presents a design of a Wireless Sensor Network (WSN) and the implementation of an original time synchronization algorithm. The complete system support for energy efficient WSNs was developed. The new time synchronization algorithm called Sliding Clock Synchronization employs a simple, yet very effective algorithm to compensate for static and dynamic drifts in the frequencies of crystal oscillators used in the WSN nodes. As power is a very scarce and critical resource in most WSN s, a tight synchronization algorithm can reduce power consumption thereby increasing the life of a WSN. An accurate and reliable synchronization algorithm also enables the WSN to be used for applications that require a tight synchronization for data correlation. A hardware and software interface for an embedded web server has been provided so that the WSN can be monitored and controlled over the Internet. An interface for a GPS module enables the network to incorporate GPS time stamps in recording network events. A sensor node emulator has been developed so that a single node can emulate multiple nodes without additional hardware, thus providing a simple and cost, effective means to test the network performance with large number of nodes.
    Description
    Thesis (M.S.) University of Alaska Fairbanks, 2007
    Table of Contents
    1. Introduction -- 2. Wireless sensor networks -- 3. Hardware -- 4. System software and communication protocol -- 5. Time synchronization -- 6. Experimental results -- 7. Conclusions and future work -- References -- Appendices.
    Date
    2007-08
    Type
    Thesis
    Collections
    Engineering

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