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Analysis of the Channel Access Mechanism in IEEE 802.11 Wireless Local Area Networks

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1 Author(s)
Hossam Fattah ; Systems and Computers Engineering, Al-Azhar University, Nasr City, Cairo, Egypt. Email:

IEEE 802.11 wireless network has spread widely during the past few years. This type of network employees a carrier-sense multiple access with collision-avoidance (CSMA/CA) scheme with exponential backoff procedure. In this paper, we present a performance analysis of IEEE 802.11 channel access mechanism. The analysis captures the details of the Distributed Function Coordination (DCF), such as the contention window size, inter-frame spacing, and packet exchange sequence, and obtains the throughput for such a network with multiple number of stations. The throughput is obtained when the station packet load varies. Two packet access mechanism, namely, the basic access mechanism and the RTS/CTS access mechanism are considered in the throughput analysis. Simulation results are presented to verify the analysis.

Published in:

2007 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing

Date of Conference:

22-24 Aug. 2007