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Title: A selective delayed channel access (SDCA) for the high-throughput IEEE 802.11n
Authors: Skordoulis, D
Ni, Q
Zarakovitis, C
Keywords: Delayed Channel Access; IEEE 802.11; Medium Access Control; TCP-Aware
Issue Date: 2009
Publisher: IEEE
Citation: WCNC 2009. IEEE Wireless Communications and Networking Conference, 2009. Budapest, 5-8 April 2009. pp. 1-6.
Abstract: Abstract— 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.
Appears in Collections:Electronic and Computer Engineering
Dept of Electronic and Computer Engineering Research Papers

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