The IMS (PDF)

We have telephony to talk to each other, messaging to dispatch mail
or instant messages, browsing to read published content and search
engines to locate content sites. However, current mobile networks
do not provide the possibility for one application rich terminal to
communicate with another in a peer-to-peer session beyond voice
calls. Mobile telephony with the current technology has been hugely
successful and shows that there is immense value in communicating
with peers while being mobile, and with increasingly available
smarter multimedia terminals the communication experience will be
something more than just exchanging voice. Those multimedia
terminals need IP multimedia networks. Hence, the Third Generation
Partnership Project (3GPP) has developed a standard for SIP based
IP multimedia service machinery known as 'The IMS (IP Multimedia
Subsystem)' and this informative book explains everything you need
to know about it.........

* Presents the architecture and functionality of logical elements
of IMS and their interfaces providing detailed description of how
elements are connected, what protocols are used and how they are
used

* Explains how the optimisation and security of the mobile
communication environment has been designed in the form of user
authentication and authorisation based on mobile identities

* Illustrates how optimisation at the radio interface is achieved
using specific rules at the user to network interface. This
includes signalling compression mechanisms as well as security and
policy control mechanisms, allowing radio loss and recovery
detection

* Addresses important aspects from an operator's point of view
while developing architecture such as charging framework, policy
and service control

* Describes many services on top of IMS in detail, including
voice, presence, messaging and conferencing.

Written in a manner that allows readers to choose the level of
knowledge and understanding they need to gain about the IMS, this
volume will have instant appeal to a wide audience ranging from
marketing managers, research and development engineers, network
engineers, developers, test engineers to university students.