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    A short-term fair MAC protocol for WLANs

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    Peer reviewed article (327.8Kb)
    Date
    2008
    Author
    Cetinkaya, Coskun
    Yildirim, Mehmet Bayram
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    Abstract
    Designing a medium access control (MAC) protocol that simultaneously provides high throughput and allows individual users to share limited spectrum resources fairly, especially in the short-term time horizon, is a challenging problem for wireless LANs. In this paper, we propose an efficient cooperative MAC protocol with very simple state information that considers only collisions, like the standard IEEE 802.11 MAC protocol. However, contrary to the IEEE 802.11 MAC, the cooperative MAC gives collided users priority to access the channel by assigning them shorter backoff counters and interframe- spaces than users who did not participate in the collision event. In other words, collided users are the only ones allowed to transmit in the following contention period. For the cooperative MAC protocol, we utilize an analytical throughput model to obtain the optimal parameter settings. Simulation results show that the cooperative MAC provides significant improvement in short-term fairness and access delay, while still providing high network throughput.
    Description
    This is the author's version of the work. It is posted here by permission of Elsevier for personal use, not for redistribution. Accepted for publications to Ad Hoc Networks,Vol. 6, No.6, August, 2008 doi:10.1016/j.adhoc.2007.07.006
    URI
    http://hdl.handle.net/10057/3434
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