Validating BitTorrent Models

Document type: Journal Articles
Article type: Original article
Peer reviewed: Yes
Author(s): David Erman, Daniel Saavedra, José Á. Sánchez González, Adrian Popescu
Title: Validating BitTorrent Models
Journal: Telecommunication Systems
Year: 2008
Volume: 39
Issue: 2
Pagination: 103-116
ISSN: 1018-4864
Publisher: Springer
URI/DOI: 10.1007/s11235-008-9115-z
ISI number: 000259009300005
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Telecommunication Systems (Sektionen för teknik – avd. för telekommunikationssystem)
School of Engineering S- 372 25 Ronneby
+46 455 38 50 00
http://www.tek.bth.se/
Authors e-mail: der@bth.se
Language: English
Abstract: BitTorrent (bt), a Peer-to-Peer (p2p) distribution system, is a major bandwidth consumer in the current Internet. This paper reports on a measurement study of bt traffic intended to identify potential traffic invariants. To this end, we employ high-accuracy packet capture hardware together with specialized parsing software. Important characteristics regarding bt sessions and messages as well as general system characteristics are reported.
The results indicate that characteristics such as session inter-arrival times are corroborated to be exponentially distributed, while other characteristics are shown to differ from previously reported results. These differences are attributed to changes in the core bt algorithms. Further, it is observed that long- and heavy-tailed distributions can be used to model several characteristics. The log-normal, Pareto and mixtures of these distributions are used to model session sizes and durations, while the Weibull distribution has been observed to model message inter-arrival and inter-departure times for bandwidth-limited clients.
Subject: Telecommunications\General
Computer Science\Networks and Communications
Telecommunications\Modelling of Bursty Traffics
Note: Published online at http://www.springerlink.com/content/vx523l6k41137025/?p=29bb5a5ddcbe43248d611242b4bcba8a&pi=0
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