Delivering music downloads over IP is simple, yet
it can be complicated if you are trying to ensure that the music is indeed received by the
subscriber. If you are relying on the Internet model for this service delivery, be prepared
to lose revenues from piracy (already prolific over the Internet). Now you have to add
a digital rights management system (DRM). Which of course cannot be integrated with
any other systems in your legacy network.
This is not so far-fetched. There are many operators today delivering multimedia
services using their traditional networks with IP overlays. However, when one tries to
support all of the back office requirements and other support systems needed, it quickly
becomes a nightmare to support.
This is why the IMS is a better alternative than traditional approaches, or even pure
IP-based networks. The Internet model works great as long as you don??™t care about
things like security, business intelligence, customer care, fraud, and billing. When it
Moving from Legacy to Convergence 35
comes to these things, the Internet model becomes much more difficult and costly to
implement.
The IMS, on the other hand, is designed to support all media, and all services, using
one common architecture and one common signaling method. This simplifies all of the
other functions needed by an operator to support its network and its services.
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