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Publications & Reports - Document Abstract

Jan Stanek, Lukáš Kencl, Jirí Kuthan
Characteristics of Real Open SIP-Server Traffic
14th Passive and Active Measurement conference
March 18-19, 2013 | Hong Kong

Voice-over-IP (VoIP) is currently one of the most commonly used communication options and Session Initiation Protocol (SIP) is most often used for VoIP deployment. However, there is not a lot of general knowledge about typical SIP traffic and research in this area largely works with various assumptions. To address this de ficiency, we present a thorough study of traffic of a real, free and publicly open SIP server. The findings reveal, among others, a surprisingly high overhead of SIP due to connection maintenance through Network Address Translation (NAT) nodes, di fferences from typical Web server Zipf-law patterns and various unexpected creative uses of SIP servers.


R&D Centre (RDC) for Mobile Applications
Dept of Telecommunications Engineering
Faculty of Electrical Engineering
Czech Technical University in Prague
Technická 2, 166 27 Prague 6
Czech Republic

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