BitTorrent Session Characteristics and Models - Extended Version

Document type: Bookchapters
Peer reviewed: Yes
Author(s): David Erman, Dragos ilie, Adrian Popescu
Title: BitTorrent Session Characteristics and Models - Extended Version
Book: Traffic and Performance Engineering for Heterogeneous Networks
Year: 2009
Editor: Demetres Kouvatsos
ISBN: ISBN 978-87-92329-16-5
Publisher: River Publishers
Organization: Blekinge Institute of Technology
Department: School of Computing (Sektionen för datavetenskap och kommunikation)
School of Computing S-371 79 Karlskrona
+46 455 38 50 00
Authors e-mail:,,
Language: English
Abstract: This paper reports on a modeling and evaluation study of session characteristics of Bit-
Torrent traffic. BitTorrent is a second generation Peer-to-Peer (P2P) application recently
developed as an alternative to the classical client-server model to reduce the load burden
on content servers and networks. Results are reported on measuring, modeling and analy-
sis of application layer traces collected at the Blekinge Institute of Technology (BTH) and
at a local Internet Service Provider (ISP). For doing this, a measurement infrastructure
has been developed at BTH to collect P2P traffic. A dedicated modeling methodology has
been put forth as well. New results are reported on session characteristics of BitTorrent,
and it is observed that session interarrival times can be accurately modeled by the hyper-
exponential distribution while session durations and sizes can be reasonably well modeled
by the lognormal distribution.
Subject: Computer Science\Networks and Communications
Keywords: bittorrent, p2p performance, p2p measurements