| List of Figures | p. ix |
| List of Tables | p. xiii |
| Preface | p. xv |
| Acknowledgements | p. xxi |
| Introduction to IMS | p. 1 |
| What is IMS? | p. 1 |
| A First Look at IMS | p. 7 |
| The IMS Architecture | p. 9 |
| Chapter Summary | p. 23 |
| Basics of Wireless Networks | p. 25 |
| The Centralized Model of Wireless Telecom Networks | p. 25 |
| The RAN and the Core Network | p. 26 |
| Concept of the Control Plane and User Plane | p. 27 |
| Functions of the Core Network | p. 28 |
| Subscriber Identity and Management | p. 29 |
| Mobility and Roaming | p. 29 |
| Charging and Billing | p. 30 |
| Service Delivery | p. 31 |
| Network Management | p. 32 |
| Chapter Summary | p. 33 |
| Basics of IP Networks | p. 35 |
| IP from an IMS perspective | p. 35 |
| Addressing | p. 36 |
| IPv4/IPv6 | p. 38 |
| Routing | p. 40 |
| Trusted Networks | p. 40 |
| NAT/Firewall Traversal -- Session Border Control | p. 41 |
| Chapter Summary | p. 43 |
| The IMS-related Protocols | p. 45 |
| Transport Protocols | p. 46 |
| Session Protocols | p. 46 |
| AAA Protocol -- Diameter | p. 59 |
| Media Protocols | p. 67 |
| IP Access and Addressing | p. 75 |
| Security | p. 84 |
| QoS | p. 89 |
| Application | p. 91 |
| Chapter Summary | p. 92 |
| Principles of Operation | p. 95 |
| Subscriber Identities and Addressing | p. 95 |
| Subscription in IMS | p. 100 |
| Authentication and Authorization | p. 103 |
| Session Control | p. 112 |
| Charging and Billing | p. 116 |
| Policy and QoS | p. 120 |
| The Service Plane | p. 124 |
| Service Orchestration and the SCIM | p. 129 |
| The Media Plane | p. 134 |
| Security | p. 136 |
| Chapter Summary | p. 139 |
| Putting it All Together | p. 141 |
| UE IP Connectivity | p. 141 |
| UE Registration and Deregistration | p. 144 |
| Session Scenarios | p. 148 |
| Chapter Summary | p. 165 |
| Services Delivered by IMS | p. 167 |
| Converged Services | p. 167 |
| Next-Gen Consumer Services | p. 170 |
| Enterprise Services | p. 199 |
| Blended Services | p. 206 |
| Emergency Services | p. 216 |
| Chapter Summary | p. 218 |
| The Promise of Convergence | p. 219 |
| Converging IMS with Other Networks | p. 219 |
| Service Convergence | p. 232 |
| IMS and Web 2.0 | p. 241 |
| Chapter Summary | p. 243 |
| Implementing IMS Functional Elements | p. 245 |
| The Network Itself | p. 245 |
| Implementing UE Applications/IMS Clients | p. 247 |
| Implementing Core Network Elements | p. 250 |
| Implementing Application Servers | p. 265 |
| Managing the IMS Network | p. 268 |
| Chapter Summary | p. 273 |
| Epilogue: Future Directions for IMS | p. 275 |
| Innovation Beyond Standards | p. 276 |
| The Promise and the Wait | p. 276 |
| Performance of IMS Networks | p. 279 |
| References and Further Reading | p. 291 |
| Index | p. 311 |
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