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Title: (T1) - Beyond Internet Telephony: SIP, IMS and P2P

Presenter: Adam Wierzbicki, Ph.D.

Duration: 1/2 Day

DESCRIPTION
While Voice over IP is becoming a commonplace application of the Internet, the full potential of the SIP protocol will be realized with the ongoing convergence of the technology and business models of telecom operators’ and the Internet. SIP is the signaling protocol of UMTS, and fourth generation (4G) networks are going to use SIP and IP technology. Telecom operators want to be more than bit carriers; their goal is the offering of complex services that can be accounted and billed, over a network that will be the result of a merger between the closed telecom network and the public Internet. For this purpose, the IP Multimedia System (IMS) has been developed, a rich middleware that utilizes SIP technology. IMS enables developers to create applications that fully integrate data, voice and video using SIP and IP, while making use of services provided and controlled by the operator. At the same time, in the Internet community, P2P-SIP is being developed with the goal of independence of infrastructure. This goal is partially in conflict with the aims of telecom operators. The use of SIP as a common tool for P2P applications is envisaged as a possibility. The addition of new middleware functions on top of P2P-SIP could facilitate the development of a P2P-IMS.

The tutorial will introduce participants to all of the relevant technologies: SIP, IMS, and P2P-SIP. The objective is first to understand SIP, and basing on this knowledge, to learn about IMS and P2P-SIP. Since all of these technologies are currently under development, the tutorial will introduce the most established parts of the technology, focusing on information that is being used by application developers. At the same time, the objective of the tutorial is to point out research and development problems relevant to the discussed subjects. Where possible, the tutorial will include programming samples in the form of handouts that can be used by the more advanced participants; however, to make the tutorial self-contained, the material related to programming will be regarded as additional. Another goal of the tutorial is for the participants to understand the trends of IMS and P2P-SIP development.

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