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Analysis of the 802.11e Enhanced Distributed Channel Access Function
 

Summary: 1
Analysis of the 802.11e Enhanced Distributed
Channel Access Function
Inanc Inan Member, Feyza Keceli Member, and Ender Ayanoglu Fellow
Center for Pervasive Communications and Computing
Department of Electrical Engineering and Computer Science
The Henry Samueli School of Engineering
University of California, Irvine, 92697-2625
Email: {iinan, fkeceli, ayanoglu}@uci.edu
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 QoS features of 802.11e, namely, CW, AIFS, and 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.
I. INTRODUCTION
The IEEE 802.11 standard [1] defines the Distributed Coordination Function (DCF) which provides
best-effort service at the Medium Access Control (MAC) layer of the Wireless Local Area Networks

  

Source: Ayanoglu, Ender - Department of Electrical and Computer Engineering, University of California, Irvine

 

Collections: Engineering