'The IMS' builds on the success of the previous best-selling edition, providing comprehensive coverage of IMS - its concepts, architecture, protocols and functionalities with a wealth of new and updated material. Mobile telephony with the current technology has been hugely successful and demonstrates the immense value of communicating with peers while being mobile, and with increasingly available smarter multimedia terminals, the communication experience will be something more than just exchanging voice. These 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). This completely up-to-date and informative guide explains everything you need to know about it.