Mathematical Problems in Engineering
Volume 2008 (2008), Article ID 574197, 17 pages
Research Article

Performance Analysis of IEEE 802.11 DCF under Nonsaturation Condition

Yutae Lee,1 Min Young Chung,2 and Tae-Jin Lee2

1Department of Information and Communication Engineering, Dongeui University, Busan 614-714, South Korea
2Electronical Engineering Major, School of Information and Communication Engineering, Sungkyunkwan University, Suwon 440-746, South Korea

Received 19 May 2008; Revised 21 October 2008; Accepted 13 November 2008

Academic Editor: J. Jiang

Copyright © 2008 Yutae Lee et al. 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.


Carrier sense multiple access with collision avoidance (CSMA/CA) methods are considered to be attractive MAC protocols for wireless LANs. IEEE 802.11 distributed coordination function (DCF) is a random channel access scheme based on CSMA/CA method and the binary slotted exponential backoff procedure to reduce the packet collision. In this paper, we propose a new analytical model for a nonsaturated IEEE 802.11 DCF network and evaluate its performance. We verify our model using simulations and show that our results agree with the simulations.