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Travis Russell

"The IP Multimedia Subsystem (IMS): Session Control and Other Network Operations"

Rather than have
disparate networks managing various forms of media, operators can consolidate their
networks into one network for all media types, all under one common control.
This means that even e-mail and video sessions are controlled and managed by the
same control network, and visibility to the various transactions within the network is
much simpler. This is certainly one of the largest holes in today??™s telecommunications
networks. Operators are able to support multimedia sessions, but they lack the controls
and mechanisms to effectively and profitably manage those sessions as a whole.
For example, a wireless provider is quite accustomed to delivering quality voice and
data to wireless devices even when the subscriber roams into other networks. But the
same operator would have difficulty delivering video to that subscriber in their home
network, much less when they are roaming. This requires more than control of the
session and connections; it requires interoperability of all of the network components
delivering the service to the end device.
Interoperability is more than the ability to connect multiple devices to one another.
It??™s about being able to integrate the various services so that they are truly seamless
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106 Chapter 5
to the subscriber. This means that subscribers need only to activate their device, select
the service they want, and begin enjoying the content being delivered to them.


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