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Nonsaturation throughput enhancement of IEEE 802.11b distributed coordination function for heterogeneous traffic under noisy environment

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Abstract

In this paper, we propose a mechanism named modified backoff (MB) mechanism to decrease the channel idle time in IEEE 802.11 distributed coordination function (DCF). In the noisy channel, when signal-to-noise ratio (SNR) is low, applying this mechanism in DCF greatly improves the throughput and lowers the channel idle time. This paper presents an analytical model for the performance study of IEEE 802.11 MB-DCF for nonsaturated heterogeneous traffic in the presence of transmission errors. First, we introduce the MB-DCF and compare its performance to IEEE 802.11 DCF with binary exponential backoff (BEB). The IEEE 802.11 DCF with BEB mechanism suffers from more channel idle time under low SNR. The MB-DCF ensures high throughput and low packet delay by reducing the channel idle time under the low traffic in the network. However, to the best of the authors’ knowledge, there are no previous works that enhance the performance of the DCF under imperfect wireless channel. We show through analysis that the proposed mechanism greatly outperforms the original IEEE 802.11 DCF in the imperfect channel condition. The effectiveness of physical and link layer parameters on throughput performance is explored. We also present a throughput investigation of the heterogeneous traffic for different radio conditions.

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, K.S.Rangasamy College of Technology, Tamilnadu, 637215, India

    Dhanasekaran Senthilkumar & A. Krishnan

Authors
  1. Dhanasekaran Senthilkumar
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  2. A. Krishnan
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Corresponding author

Correspondence to Dhanasekaran Senthilkumar.

Additional information

Dhanasekaran Senthilkumar received the B. Eng. degree from Bharathiar University, Coimbatore, India in 1997, and the M. Tech. degree from Sastra University, Tanjavore, India in 2002. From 2002 to 2007, he worked as a lecturer in K. S. Rangasamy College of Technology, Tamilnadu, India. He is currently a Ph. D. candidate in Anna University, Chennai, India. He is a member of IETE and ISTE.

His research interests include performance analysis and quality of service of wireless local area networks.

A. Krishnan received the Ph.D. degree from Indian Institute of Technology Kanpur, Kanpur, India. He is currently a professor with K. S. Rangasamy College of Technology, Tiruchengode, Tamilnadu, India. He is a member of IEEE, IETE, and ISTE.

His research interests include quality of service of high-speed networks, signal processing, and network security.

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Senthilkumar, D., Krishnan, A. Nonsaturation throughput enhancement of IEEE 802.11b distributed coordination function for heterogeneous traffic under noisy environment. Int. J. Autom. Comput. 7, 95–104 (2010). https://doi.org/10.1007/s11633-010-0095-6

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  • DOI: https://doi.org/10.1007/s11633-010-0095-6

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