Providing an overview of the IMS and its technologies, this book describes how each technology works on the Internet and explains how the technology is adapted to work in the IMS. It is aimed at engineers, programmers, business managers, marketing representatives, and technically aware users.

It provides SIP-based service examples such as presence, instant messaging and Push-to-Talk. Engineers, programmers, business managers, marketing representatives, and technically aware users will all find this book invaluable as it will help them to understand how the IMS works and the business model behind it.

Foreword by Stephen Hayes.Foreword by Allison Mankin and Jon Peterson.About the Authors.Preface.Acknowledgements.I: INTRODUCTION TO THE IMS.1. IMS Vision: Where do We Want to Go?2. The History of the IMS Standardization.3. General Principles of the IMS Architecture.II: THE SIGNALING PLANE IN THE IMS.4. Session Control in the Internet.5. Session Control in the IMS.6. AAA on the Internet.7. AAA in the IMS.8. Security on the Internet.9. Security in the IMS.10. Policy on the Internet.11. Policy in the IMS.12. Quality of Service on the Internet.13. Quality of Service in the IMS.III: THE MEDIA PLANE IN THE IMS.14. Media Encoding.15. Media Transport.IV BUILDING SERVICES WITH THE IMS.16. The Presence Service in the Internet.17. The Presence Service in the IMS.18. Instant Messaging Service in the Internet.19. The Instant Messaging Service in the IMS.20. Push-To-Talk.Appendix A: The 3GPP2 IMS.Appendix B: List of IMS-related Specifications.