A Fixed Backoff-Time Switching Method for CSMA/CA Protocol in Wireless Mesh Networks

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Author(s)

    • FUNABIKI Nobuo
    • the Graduate School of Natural Science and Technology, Okayama University
    • NAKANISHI Toru
    • the Graduate School of Natural Science and Technology, Okayama University
    • WATANABE Kan
    • the Graduate School of Natural Science and Technology, Okayama University

Abstract

As a flexible and cost-efficient scalable Internet access network, we studied architectures, protocols, and design optimizations of the <i>Wireless Internet-access Mesh NETwork (WIMNET)</i>. WIMNET is composed of multiple access points (APs) connected through multihop wireless communications on <i>IEEE 802.11 standards</i>. The increasing popularity of real-time applications such as IP-phones and IP-TV means that they should be supported in WIMNET. However, the contention resolution mechanism using a random backoff-time in the <i>CSMA/CA protocol</i> of 802.11 standards is not sufficient for handling real-time traffic in multihop wireless communications. In this paper, we propose a <i>Fixed Backoff-time Switching (FBS) method</i> for the CSMA/CA protocol to improve the real-time traffic performance in WIMNET by giving the necessary activation chances to each link. We implement our proposal on the <i>QualNet</i> simulator, and verify its effectiveness through simulations on three network topologies with four scenarios.

Journal

  • IEICE Transactions on Communications

    IEICE Transactions on Communications 96(4), 1019-1029, 2013-04-01

    The Institute of Electronics, Information and Communication Engineers

References:  23

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