Delay Model for 802.11 MAC protocol

Associate Professor Lee Hai Vu

Faculty of Information and Communication Technologies (FICT), Swinburne University of Technology, Hawthorn, Victoria.

Date and time: 11.30am - 12.30pm, Friday 19th June, 2009

Venue: 10.08.04 (Building 10, Level 8, Room 4)

Abstract:

Wireless local area networks (WLANs) have become very popular in recent years. While the majority of traffic carried on a typical IEEE 802.11 WLAN today consists of non-realtime applications such as web browsing and email, it is expected that a significant proportion of the traffic on WLANs will consist of realtime applications such as voice over IP in the near future. To understand the potential for IEEE 802.11 WLANs to support such delay-sensitive applications, performance models for evaluating delay characteristics are needed.

In this talk, we present a unified analytical model and obtain explicit expressions for the first two moments as well as the generating function of the medium access control (MAC) access delay in WLANs. The key ideas behind the model are explained. We show via comparison with simulation that our model accurately predicts the mean, standard deviation and distribution of the access delay for a wide range of operating conditions.

About the speaker:

Hai L. Vu received the B.Sc./M.Sc. and Ph.D. degrees in electrical engineering from the Technical University of Budapest, Budapest, Hungary, in 1994 and 1999, respectively. From 1994 to 2000, he was a Research Engineer with Siemens AG, Hungary. During this period, his focus was on performance measurements, Internet quality of service, and IP over ATM. During 2000-2005, he was with the Department of Electrical and Electronic Engineering, University of Melbourne, Melbourne, Australia. In 2005, he joined Swinburne University of Technology and is with the Centre for Advanced Internet Architectures (CAIA). He is currently an Associate Professor at the Faculty of Information and Communication Technologies (FICT), Swinburne University of Technology, Hawthorn, Victoria, Australia. His research interests are in data network modeling, performance evaluation of wireless and optical networks, and telecommunication networks design.

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Seminar Organisation

Seminars are free and open to the general public. No booking is necessary. If you are interested in giving a presentation in this seminar series, or to make suggestions for speakers, please contact Xiaodong Li, the seminar co-ordinator.