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Gonzalo Camarillo leads the Advanced Signalling Research Laboratory of Ericsson in Helsinki, Finland. He is an active participant in the IETF, where he has authored and co-authored several specifications used in the IMS. In particular, he is a co-author of the main SIP specification, RFC 3261. In addition, he co-chairs the IEFT SIPPING working group, which handles the requirements from 3GPP and 3GPP2 related to SIP, and the IETF HIP (Host Identity Protocol) working group, which deals with lower-layer mobility and security. He is the Ericsson representative in the SIP Forum and is a regular speaker at different industry conferences. During his stay as a visitor researcher at Columbia University in New York, USA, he published a book entitled “SIP Demystified”. Gonzalo received an M.Sc. degree in Electrical Engineering from Universidad Politecnica de Madrid, Spain, and another M.Sc. degree (also in Electrical Engineering) from the Royal Institute of Technology in Stockholm, Sweden. He is currently continuing his studies as a Ph.D. candidate at Helsinki University of Technology, in Finland.

Miguel A. García-Martín is a Senior Expert in IP Multimedia technologies at Ericsson in Helsinki, Finland. He is an active participant of both IETF and 3GPP. In the IETF, he has authored and co-authored several specifications related to the IMS. In 3Gpp, he has been a key contributor to the development of the IMS standard. Miguel is also a regular speaker at different industry conferences. Miguel received a B. Eng. Degree in Telecommunications Engineering from Universidad de Valladolid, Spain.

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.

"…a great starting point for those readers who want to learn the IMS and explore it further." (E-STREAMS, September 2005)