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Journal of Applied Mathematics
Volume 2013, Article ID 792529, 9 pages
http://dx.doi.org/10.1155/2013/792529
Research Article

Latency and Jitter Analysis for IEEE 802.11e Wireless LANs

1Telecommunication Systems Division, Samsung Electronics Co., Ltd., Dong Suwon P.O. Box 105, 416 Maetan-3dong, Yeongtong-gu, Suwon-si, Gyeonggi-do 443-742, Republic of Korea
2Department of Ubiquitous Computing, Hallym University, 39 Hallymdaehak-gil, Chuncheon-si, Gangwon-do 200-702, Republic of Korea

Received 24 September 2013; Accepted 31 October 2013

Academic Editor: Jongsung Kim

Copyright © 2013 Sungkwan Youm and Eui-Jik Kim. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents a numerical analysis of latency and jitter for IEEE 802.11e wireless local area networks (WLANs) in a saturation condition, by using a Markov model. We use this model to explicate how the enhanced distributed coordination function (EDCF) differentiates classes of service and to characterize the probability distribution of the medium access control (MAC) layer packet latency and jitter, on which the quality of the voice over Internet protocol (VoIP) calls is dependent. From the proposed analytic model, we can estimate the available number of nodes determining the system performance, in order to satisfy user demands on the latency and jitter.