The 3G IP Multimedia Subsystem (IMS): Merging the Internet and the Cellular Worlds, Third Edition

Part I

Introduction to the IMS

Before we look at how the IMS works in Parts II and III of this book we need to provide some background information on the IMS. This part (Part I) of the book will answer questions on, for example, what the IMS is, why it was created, what it provides, and which organizations are involved in its standardization. In addition, we will describe the IMS architecture and the design principles behind it