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Understanding 802.11e Voice Behaviour via Testbed Measurements and Modeling

Dangerfield, Ian and Malone, David and Leith, Douglas J. (2007) Understanding 802.11e Voice Behaviour via Testbed Measurements and Modeling. In: Proceedings of the Fifth International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks WiOpt 2007, 16-20 April 2007, Limassol, Cyprus .

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Abstract

Analytic modeling and simulation of 802.11 and 802.11e have flagged up a number of potential performance problems with voice in an infrastructure mode network. This body of work has also predicted a number of possible solutions, such as the use of TXOP. In this paper we reproduce a number of these problems in a 802.11 testbed, and demonstrate that analytic models usefully bound performance. We study the impact of buffer size, which is difficult to fully capture in analytic models. We observe an asymmetry in buffer requirements between stations and the access point and explore how buffering and the use of TXOP impact throughput and delay of voice.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Copyright Notice "©2007IEEE. Reprinted from Proceedings of the Fifth International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks WiOpt 2007. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE." http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4480108&isnumber=4480002
Keywords: Access protocols; Wireless LAN; 802.11e voice behaviour; TXOP; Buffer requirements; Infrastructure mode network; Testbed measurements; 802.11e; CSMA/CA; Buffering; Measurement; Test-bed; Voice.
Subjects: Science & Engineering > Hamilton Institute
Science & Engineering > Computer Science
Item ID: 1473
Depositing User: Dr. David Malone
Date Deposited: 07 Jul 2009 16:08
Refereed: Yes
URI:

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