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Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/3608

Title: Modeling and analysis of slow CW decrease IEEE 802.11 WLAN
Authors: Ni, Q
Aad, I
Barakat, C
Turletti, T
Keywords: IEEE 802.11; DCF; slow CW decrease scheme; RTS/CTS
Publication Date: 2003
Publisher: IEEE
Citation: PIMRC 2003. 14th IEEE Proceedings on Personal, Indoor and Mobile Radio Communications. Beijing, China, September 2003.
Abstract: The IEEE 802.11 medium access control (MAC) protocol provides a contention-based distributed channel access mechanism for mobile stations to share the wireless medium, which may introduce a lot of collisions in case of overloaded active stations. Slow contention window (CW) decrease scheme is a simple and efficient solution for this problem. In this paper, we use an analytical model to compare the slow CW decrease scheme to the IEEE 802.11 MAC protocol. Several parameters are investigated such as the number of stations, the initial CW size, the decrease factor value, the maximum backoff stage and the coexistence with the RequestToSend and ClearToSend (RTS/CTS) mechanism. The results show that the slow CW decrease scheme can efficiently improve the throughput of IEEE 802.11, and that the throughput gain is higher when the decrease factor is larger. Moreover, the initial CW size and maximum backoff stage also affect the performance of slow CW decrease scheme.
URI: http://bura.brunel.ac.uk/handle/2438/3608
Appears in Collections:School of Engineering and Design Research papers
Electronic and Computer Engineering

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