Experimental Investigation of link layer adaptation in IEEE 802.11n WLANs.

Al-Adhami, Mujahid, Al-Dubai, Ahmed and Romdhani, Imed (2012) Experimental Investigation of link layer adaptation in IEEE 802.11n WLANs. In: WTS 2012 : 11th Wireless Telecommunications Symposium, 18-20 April 2012, London, Uk.

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Due to its low cost wireless communication methodology and improvements in both its physical (PHY) and MAC (Link) layers, the IEEE 802.11n wireless LAN (WLAN) technology has been adopted widely. However, fairness of current 802.11n rate adaptation (RA) mechanisms and analysis of practical user end-to-end throughput are among important issues still in their infancy. Thus in this paper, we conduct an experimental investigation of adapting 802.11n MAC and PHY layer parameters in an indoor 3 × 3 MIMO testbed. We detail the deployment of our infrastructure mode testbed and compare the performance of 802.11n RA mechanisms under various conditions, including simultaneous transmissions and Co-Channel Interference (CCI). We then examine a range of elements affecting application performance including the number of spatial streams, packet length, frame aggregation subframe number and length. Favorable results are observed across a set of configurations and parameters, such as the increase in A-MPDU subframe length and its impact on end-to-end throughput. We believe our results demonstrate how overall application performance may be influenced by the Link layer; some of which may also be applicable to the upcoming 802.11ac IEEE standard

Item Type: Conference or Workshop Item (Paper)
Electronic ISSN: 1934-5070
Additional Information: “© 2012 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.”
Uncontrolled Keywords: Link layer adaptation; IEEE 802.11n WLANs;
University Divisions/Research Centres: Edinburgh Napier University, Institute for Informatics and Digital Innovation
Dewey Decimal Subjects: 000 Computer science, information & general works > 000 Computer science, knowledge & systems > 004 Data processing & computer science
Library of Congress Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Item ID: 5302
Depositing User: Computing Research
Date Deposited: 08 Jun 2012 10:42
Last Modified: 10 Jan 2014 13:35

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