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
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.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.
3.6. Identity modules
3.6.1. IP Multimedia Services Identity Module (ISIM)
An IP Multimedia Services Identity Module (ISIM) is an application residing on the Universal Integrated Circuit Card (UICC), which is a physically secure device that can be inserted and removed from UE. There may be one or more applications in the UICC. The ISIM itself stores IMS-specific subscriber data mainly provisioned by an IMS operator. The stored data can be divided into six groups as shown in Figure 3.5. Most of the data are needed when a user performs an IMS registration [3GPP TS 31.103]:
Security keys consist of integrity keys, ciphering keys and key set identifiers. Integrity keys are used to prove integrity protection of SIP signalling. Ciphering keys are used to provide confidential protection of SIP signalling. Confidential protection is not used in Release 5; however, in Release 6 it should be possible to use confidential protection. At the time of writing there is a need for key set identifiers.
Figure 3.5. IP Multimedia Services Identity Module.
The private user identity simply contains the private user identity of the user. It is used in a registration request to identify the user's subscription (see Section 3.5.1.1 for further information).
The public user identity contains one or more public user identities of the user. It is used in a registration request to identify an identity to be ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.