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A Selective Delayed Channel Access (SDCA) for the high-throughput IEEE 802.11n

Skordoulis, Dionysios and Ni, Qiang and C. Zarakovitis, Charilaos (2009) A Selective Delayed Channel Access (SDCA) for the high-throughput IEEE 802.11n. In: Wireless Communications and Networking Conference, 2009. WCNC 2009. IEEE :. IEEE, New York, pp. 1173-1178. ISBN 978-1-4244-2947-9

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In this paper we investigate the potential benefits of a selective delayed channel access algorithm (SDCA) for the future IEEE 802.11n based high-throughput networks. The proposed solution aims to resolve the poor channel utilization and the low efficiency that EDCA's high priority stations adhere due to shorter waiting times and consequently to the network's degrading overall end performance. The algorithm functions at the MAC level where it delays the packets from being transmitted by postponing the channel access request, based on their traffic characteristics. As a result, the flow's average aggregate size increases and consequently so is the channel efficiency. However, in some situations we notice that further deferring has a negative impact with TCP applications, thus we further introduce a traffic awareness feature that allows the algorithm to distinguish which flows are using the TCP protocol and override any additional MAC delay. We validate through various simulations that SDCA improves throughput significantly and maximizes channel utilization.

Item Type: Contribution in Book/Report/Proceedings
Subjects: ?? qa75 ??
Departments: Faculty of Science and Technology > School of Computing & Communications
ID Code: 59638
Deposited By: ep_importer_pure
Deposited On: 29 Oct 2012 13:21
Refereed?: No
Published?: Published
Last Modified: 18 Sep 2018 06:25
Identification Number:

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