Analysis of the 802.11e enhanced distributed channel access function

  • Authors:

  • Inanc Inan;Feyza Keceli;Ender Ayanoglu

  • Affiliations:

  • Wionics Research - Realtek Group, Irvine, CA and Department of Electrical Engineering and Computer Science, Center for Pervasive Communications and Computing, Henry Samueli School of Engineering, ...;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 an analytical model for the performance analysis of the Enhanced Distributed Channel Access (EDCA) function of the IEEE 802.11e standard. The proposed Discrete-Time Markov Chain (DTMC) model incorporates the main Quality-of-Service (QoS) features of 802.11e, namely, Contention Window (CW), Arbitration Interframe Space (AIFS), and Transmit Opportunity (TXOP) differentiation. Due to its specific design, the proposed DTMC model jointly considers the state of the Medium Access Control (MAC) layer buffer and the MAC differentiation mechanisms which facilitates a novel performance analysis framework at an arbitrary traffic load. Analytical and simulation results are compared to demonstrate the accuracy of the proposed approach for varying traffic load, EDCA parameters, and MAC layer buffer space.