THE IMS: IP Multimedia Concepts and Services, 3rd Edition

Contents

Foreword

Preface

Acknowledgements

List of Figures

List of Tables

PART I IMS ARCHITECTURE AND CONCEPTS

1 Introduction

1.1 What is the Internet Protocol Multimedia Subsystem (IMS)?

1.2 Fixed and Mobile Convergence

1.3 Example of IMS Services

1.4 Where did it come from?

1.4.1 3GPP Release 99 (3GPP R99)

1.4.2 3GPP Release 4

1.4.3 3GPP Releases 5 and 6

1.4.4 IMS Development in other Standardization Development Organizations

1.4.5 3GPP Release 7 and common IMS

1.4.6 Insight to 3GPP Release 8

1.5 Why a SIP Solution Based on 3GPP Standards?

2 IP Multimedia Subsystem Architecture

2.1 Architectural Requirements

2.1.1 IP Multimedia Sessions

2.1.2 IP Connectivity

2.1.3 Ensuring Quality of Service for IP Multimedia Services

2.1.4 IP Policy Control for Ensuring Correct Usage of Media Resources

2.1.5 Secure Communication

2.1.6 Charging Arrangements

2.1.7 Support of Roaming

2.1.8 Interworking with Other Networks

2.1.9 Service Control Model

2.1.10 Layered Design and Access Independence

2.2 Description of IMS-related Entities and Functionalities

2.2.1 Call Session Control Functions (CSCF)

2.2.2 Emergency Call Session Control Function (E-CSCF)

2.2.3 Databases

2.2.4 Service Functions

2.2.5 IMS-CS Interworking Functions

2.2.6 Support Functions

2.2.7 Charging Entities

2.2.8 GPRS Entities

2.3 IMS Reference Points

2.3.1 Gm Reference Point

2.3.2 Mw Reference Point

2.3.3 IMS Service Control (ISC) Reference Point

2.3.4 Ma Reference Point

2.3.5 Cx Reference Point

2.3.6 Dx Reference Point ...