A Novel Performance Evaluation Model for IEEE 802.11e EDCA

Abstract

IEEE 802.11e Enhanced Distributed Channel Access (EDCA) is the mo st popular standard used in WLAN to support QoS for various real-time service flows. Based on DCF, EDCA introduces some new QoS parameters, which are defined by IEEE 802.11e standard. But how to adjust these parameters is still worth investigating. In the paper, we present a novel saturated throughput analysis of the IEEE 802.11e EDCA. This approach involves a novel analytical model that is an extension to previous works by other authors which provide Markov chain analysis to IEEE 802.11e EDCA. The throughput analysis of our model is evaluated by comparison with NS2 simulations and found the model is accurate and suitable for both basic access and request-to-send/clear-to-send (RTS/CTS) access mechanisms.