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Modeling and analysis of slow CW decrease for IEEE 802.11 WLAN

Ni, Q. and Aad, I. and Barakat, C. and Turletti, T. (2003) Modeling and analysis of slow CW decrease for IEEE 802.11 WLAN. In: Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003. 14th IEEE Proceedings on. IEEE, pp. 1717-1721. ISBN 0-7803-7822-9

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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.

Item Type: Contribution in Book/Report/Proceedings
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Departments: Faculty of Science and Technology > School of Computing & Communications
ID Code: 59670
Deposited By: ep_importer_pure
Deposited On: 20 Nov 2012 10:25
Refereed?: No
Published?: Published
Last Modified: 23 Oct 2017 02:42
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/59670

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