Chapter 1

Introduction to IMS

The current generation of wireless cellular networks has relied on a digital network infrastructure to deliver traditional voice and data services. This provides the signaling and switching between the endpoints and various functional elements in the network. In the continued evolution path, wireless standards are focused on building the next-generation all-IP network infrastructure. This helps to provide higher bandwidths, lower the capital and operational costs of the network, offer a new generation of services, and provide seamless convergence with the Internet.

The IP Multimedia Subsystem (IMS) was crafted as a part of the third-generation (3G) network to solve these needs. The value of IMS has, however, grown ...

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