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I. Rodriguez:
"QoS Estimation during Session Initiation of Video Streaming Session";
Supervisor: M. Ries, P. Reichl, M. Rupp; Nachrichtentechnik und Hochfrequenztechnik, 2007.

The goal of this work is investigate the QoS provision mechanisms that can be used during the media session initialization, the translation of such mechanisms to Session Initiation Protocol an Session Description Protocol signalling and a physical analysis task over an IMS testbed, that give rise to the knowledge of the current IMS deployment in this field. The steps followed to achieve this aim are divided in two diferent parts. The first part comprises a research study of 3GPP
technical specifications and reports, recommendations, proposals,
Request for Comments and all the literature involved. The second part
deals with the comparison evaluation of theoretical supported and
available mechanisms, architectures or designs in front of the physical
development of all this aspects. The main contribution of this work is,
therefore, an accurate State of Art about IMS QoS provision and a
lack collection in the available IMS test tools.

http://publik.tuwien.ac.at/files/pub-et_12486.pdf