A capacity analysis framework for the IEEE 802.11e contention-based infrastructure basic service set

  • Authors:

  • Inanc Inan;Feyza Keceli;Ender Ayanoglu

  • Affiliations:

  • Wionics Technologies, Irvine, CA and Department of Electrical Engineering and Computer Science, Center for Pervasive Communications and Computing, Henry Samueli School of Engineering, University o ...;Networks In Motion, Aliso Viejo, CA and Department of Electrical Engineering and Computer Science, Center for Pervasive Communications and Computing, Henry Samueli School of Engineering, Universit ...;Department of Electrical Engineering and Computer Science, Center for Pervasive Communications and Computing, Henry Samueli School of Engineering, University of California, Irvine, CA

  • Venue:
  • IEEE Transactions on Communications
  • Year:
  • 2009

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Abstract

We propose a multimedia capacity analysis framework for the Enhanced Distributed Channel Access (EDCA) function of the IEEE 802.11e standard. Our analysis shows that the multimedia capacity of the EDCA function for each Access Category (AC) can accurately be estimated by appropriately weighing the service time predictions of a saturation model over different number of active stations. We propose a simple and generic cycle time model to derive the service time in saturation which we employ in the calculation of an accurate station- and AC-specific queue utilization ratio. Based on the estimated queue utilization ratio, we design a simple modelbased admission control scheme. We show that the proposed call admission control algorithm maintains satisfactory user-perceived quality for coexisting voice and video connections in an infrastructure Basic Service Set (BSS) and does not present over-or under-admission problems of previously proposed models in the literature.