Saturation throughput analysis of multi-rate IEEE 802.11 wireless networks

  • Authors:

  • Der-Jiunn Deng;Bin Li;Lianfen Huang;Chih-Heng Ke;Yueh-Min Huang

  • Affiliations:

  • Department of CSIE, National Changhua University of Education, Taiwan, R.O.C.;Department of CE, School of Information Science and Technology, Xiamen University, Xiamen, Fujian, China;Department of CE, School of Information Science and Technology, Xiamen University, Xiamen, Fujian, China;Department of CSIE, National Kinmen Institute of Technology, Taiwan, R.O.C.;Department of ES, National Cheng Kung University, Taiwan, R.O.C.

  • Venue:
  • Wireless Communications & Mobile Computing
  • Year:
  • 2009

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Abstract

IEEE 802.11 protocol supports adaptive rate mechanism, which selects the transmission rate according to the condition of the wireless channel, to enhance the system performance. Thus, research of multi-rate IEEE 802.11 medium access control (MAC) performance has become one of the hot research topics. In this paper, we study the performance of multi-rate IEEE 802.11 MAC over a Gaussian channel. An accurate analytical model is presented to compute the system saturation throughput. We validate our model in both single-rate and multi-rate networks through various simulations. The results show that our model is accurate and channel error has a significant impact on system performance. In addition, our numerical results show that the performance of single-rate IEEE 802.11 DCF with basic access method is better than that with RTS-CTS mechanism in a high-rate and high-load network and vice versa. In a multi-rate network, the performance of IEEE 802.11 DCF with RTS-CTS mechanism is better than that with basic access method in a congested and error-prone wireless environment. Copyright © 2008 John Wiley & Sons, Ltd.