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Adaptive Priority Sliding Admission Control and Scheduling Scheme for DCF and EDCA WLANs

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Abstract

In this paper an Adaptive Priority Sliding Admission Control and Scheduling (APSAS) scheme is proposed to provide QoS over the existing IEEE802.11 WLANs which operate on Distributed Coordination Function (DCF) and Enhanced Distributed Channel Access (EDCA) mechanisms. The roles of this scheme are generally two folds: (1) To control the number of delay-sensitive real time flows that can be admitted into the WLAN Basic Service Set network and (2) To adjust the priority of selected real time flows in order to accommodate more real time flows without violating the QoS requirement. Extensive simulation studies show that APSAS improves the total throughput, flow throughput ratio, packets end-to-end delay, and jitter of the real time applications when compared with conventional best effort and scheduling-enhanced DCF/EDCA. APSAS also offers near to unity average throughput ratio, lower mean VoIP end-to-end packet delay (<130 ms) and lower mean video packet jitter (<130 ms) over DCF and EDCA.

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Authors and Affiliations

  1. Multimedia University, Cyberjaya, Malaysia

    Wai Leong Pang & Nurul Nadia Ahmad

  2. Wireless Communications Cluster, MIMOS Berhad, Kuala Lumpur, Malaysia

    David Chieng

Authors
  1. Wai Leong Pang
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  2. David Chieng
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  3. Nurul Nadia Ahmad
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Correspondence to Wai Leong Pang.

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Pang, W.L., Chieng, D. & Ahmad, N.N. Adaptive Priority Sliding Admission Control and Scheduling Scheme for DCF and EDCA WLANs. Wireless Pers Commun 70, 295–321 (2013). https://doi.org/10.1007/s11277-012-0695-2

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  • DOI: https://doi.org/10.1007/s11277-012-0695-2

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