The 3G IP Multimedia Subsystem (IMS) (PDF)

If you need to know the IMS vision you need to read thisbook.
The IMS (IP Multimedia Subsystem) is the exciting new technologythat will merge the Internet with the cellular world. It will makeInternet technologies such as the web, email, instant messaging,presence, and videoconferencing available nearly everywhere.
The 3G IP Multimedia Subsystem (IMS) provides a thoroughoverview of the IMS and its technologies. Throughout, the authorsfirst describe how each technology works on the Internet and thenexplain how the same technology is adapted to work in the IMS,enabling readers to take advantage of any current and futureInternet service.
* Presents an introduction to the IMS - its goals, history,vision, the organizations involved in its standardization andarchitecture
* Discusses the signalling plane of the IMS including protocols,such as SIP and Diameter, used between the IMS architecturalentities. Also describes how the IETF developed these protocols andhow they are used in the IMS architecture
* Describes the media plane of the IMS and discusses Internetprotocols that are not currently used in the IMS but may be in thefuture
* Provides SIP-based service examples such as presence, instantmessaging and Push-to-Talk
Engineers, programmers, business managers, marketingrepresentatives, and technically aware users will all find thisbook invaluable as it will help them to understand how the IMSworks and the business model behind it.