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Opportunistic spectrum scheduling for multiuser cognitive radio: a queueing analysis

Published: 01 October 2009 Publication History

Abstract

We develop a queueing analytic framework to study the data link layer quality-of-service performance measures for cognitive radio users in an infrastructure-based dynamic spectrum access environment. In order to allocate the available spectrum white spaces among the cognitive radio users in a spectrum overlay scenario, an opportunistic scheduling scheme is considered. The queueing model considers bursty traffic arrival pattern at the cognitive radio user ends, finite buffer size, activity of primary users (i.e., dynamic channel availability), and correlated channel fading. We present a step-by-step procedure to derive the delay distribution, average throughput, and packet loss rate for the cognitive radio users. The proposed framework facilitates cross-layer design for improved QoS experience in cognitive radio networks. Usefulness of the developed analytical model is demonstrated through example applications.

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    Information

    Published In

    cover image IEEE Transactions on Wireless Communications
    IEEE Transactions on Wireless Communications  Volume 8, Issue 10
    October 2009
    478 pages

    Publisher

    IEEE Press

    Publication History

    Published: 01 October 2009
    Accepted: 24 May 2009
    Revised: 18 March 2009
    Received: 17 November 2008

    Author Tags

    1. Cognitive radio
    2. Markov chain
    3. cognitive radio
    4. cross-layer design
    5. delay statistics
    6. opportunistic scheduling
    7. performance analysis
    8. queueing model

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