IMS architecture allows a telecom operator to do the same: bundle a nontelecom
product with a telephone service (or voice) component.
Finally, today major Tier One telecom operators have many non-interoperable or
so-called ???smokestack??? back-office functions generally referred to as operations and
business support systems (OSS/BSS). With IMS architecture, these smokestacks can be
reduced to one OSS/BSS, thereby increasing operational efficiency and reducing costs.
So in a nutshell, what??™s IMS? It??™s a vast collection of developed functions and interface
standards under one umbrella architecture called IMS. The key to its almost universal
acceptance by the telecom standards community is that it reuses already established
standards such as Session Initiation Protocol (SIP) and DIAMETER.
ix
The bottom line is that if you are a telecom operator employee or supplier addressing
the next-generation network architecture, this book is a must read and ready reference.
There is no other next-generation architecture for IP networks than IMS.
What makes this book so valuable is that it gives the reader a transitional road map
to an IMS architecture as well as a significant clarification of the many functional and
interface standards. Eventually everyone involved in the next-generation networks
must have an understanding of IMS, and this book is a great starting point.
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