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Understanding 802.11e Voice Behaviour via Testbed Measurements and Modeling

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3 Author(s)
Dangerfield, I. ; Hamilton Inst., Nat. Univ. of Ireland, Maynooth ; Malone, D. ; Leith, D.J.

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.

Published in:

Modeling and Optimization in Mobile, Ad Hoc and Wireless Networks and Workshops, 2007. WiOpt 2007. 5th International Symposium on

Date of Conference:

16-20 April 2007

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