March 2006
Intermediate to advanced
464 pages
12h 16m
English
book
The IMS: IP Multimedia Concepts And Services, Second Edition
by Miikka Poikselka, Georg Mayer, Hisham Khartabil, Aki Niemi
Content preview from The IMS: IP Multimedia Concepts And Services, Second Edition
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Foreword by Petri Pöyhönen
We have telephony so that we can talk to each other. We have messaging so that we can dispatch mail or instant notes. We have browsing so that we can read published content on known sites. We even have search engines to locate content sites, which may have content relevant to us. This may look as if we have a lot on our plate; so, do we need Internet Protocol (IP) Multimedia Subsystem (IMS)?
The problem is that we have no practical mechanism to engage another application-rich terminal in a peer-to-peer session. Enormously successful mobile telephony shows that there is immense value in sharing with peers. With increasingly attractive terminals, the sharing experience will become much more than just exchanging voice.
We will be sharing real-time video (see what I see), an MP3-coded music stream,[] a whiteboard to present objects and we will be exchanging real-time game data. Many of these will take place simultaneously. There is undoubtedly the need to break into this completely new ground of communication.
[] MP3 is the voice compression method developed by the Moving Picture Experts Group (MPEG), by means of which the size of a voice-containing file can be reduced to one-tenth of the original without significantly affecting the quality of voice.
Telephony is sufficient for telephones. Multimedia terminals need IMS networks.
Session Initiation Protocol (SIP) enables clients to invite others to a session and negotiate control information about the media ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.