Title :
Performance analysis of differentiated QoS supported by IEEE 802.11e enhanced distributed coordination function (EDCF) in WLAN
Author :
Xu, Kenan ; Wang, Quanhong ; Hassanein, Hossam
Author_Institution :
Dept. of Electr. & Comp. Eng., Queen´´s Univ., Canada
Abstract :
This paper proposes a multidimensional Markov model to analyze performance of the IEEE802.11e EDCF protocol. Based on this model, we present extensive performance evaluation in terms of saturation throughput (ST), throughput ratios, and access delay of flows of distinct priorities under RTS/CTS mode. We also provide quantitative analysis of the impact of prioritized parameters, i.e., arbitration interframe space (AIFS), contention window (CW) on QoS differentiation. The accuracy of the proposed model is verified by means of comparing the numerical results obtained from both analytical model and simulations.
Keywords :
Markov processes; numerical analysis; protocols; quality of service; wireless LAN; AIFS; CTS mode; EDCF protocol; IEEE 802.11e; RTS; WLAN; arbitration interframe space; clear-to-send; contention window; differentiated QoS; enhanced distributed coordination function; multidimensional Markov model; request-to-send; saturation throughput; Access protocols; Analytical models; Counting circuits; Delay; Distributed computing; Performance analysis; Throughput; Traffic control; Variable structure systems; Wireless LAN;
Conference_Titel :
Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE
Print_ISBN :
0-7803-7974-8
DOI :
10.1109/GLOCOM.2003.1258398
