The IP Multimedia Subsystem (IMS)

UICC and LTE Together: Benefits and Possibilities

In the LTE 4G Network, new services move to IP (Internet protocol) and are operated through the IP Multimedia Subsystem (IMS) network. IMS is the key to a converged wireless and fixed network world. Subscribers can use the same services across devices (mobile phones, PCs, office or home networks) and through a number of different channels (WiFi, DSL, LAN, 3G, etc). In these examples, the UICC can be contained in a USB dongle or other form factor in addition to the mobile phone. This is significant as subscribers have the potential to have multiple devices associated with the same account, increasing the potential for a multiple penetration rate within an operator’s existing subscriber base.

To put IMS capabilities in a real-world example, it is possible for subscribers to look at their list of contacts on a mobile phone and know that someone is connected to both his PDA and his PC, and is available for a voice chat or instant messaging, but not video conferencing. Conversely, he can see that another subscriber is connected via mobile phone and not by PC, and not accepting any incoming calls or instant messages. It is truly an always-on type of environment.

Giving users the ability to access any service at any time on any device and on any network is clearly attractive and beneficial to both operators and subscribers. However, exchanging voice, video, data and more across a variety of channels and devices presents unique security considerations. An IMS network is built around the Session Initiation Protocol (SIP). SIP is used because it provides an easy and open way to set up and control rich media applications over an IP network. Therefore, it follows that the network will carry the same security vulnerabilities as SIP and IP networks as a whole.

This is why the UICC is integral for secure access to the IMS network. Co-existing on the UICC's on-board computer with the USIM application is the ISIM. The ISIM is the collection of all of the IMS security data and functions on the UICC that is used to mutually authenticated users on IMS networks. Each subscriber device (wireless or wired) will have its own UICC representing them in the network and will be authenticated from each with the strongest levels of security. The UICC can authenticate connections to access networks (3G, 3.5G, WIFI, WIMAX) and be used to register to an IMS network using SIP protocols.
 

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See also...

Technical white paper

Smart Card in IMS
 

Technical White Paper Smart Card in IMSThe role of the smart card in the IMS network, and the benefits to the operator of using the smart card for authenticating the subscriber, securing exchanges and managing the subscriber presence.

Download Brochures

UpTeq™ Smart DongleUpTeq™ Smart Dongle
Open up your services to the PC world, securely and simply


Gemalto Dual IMSI SolutionGemalto Dual IMSI Solution


 

Training: Fundamentals & Technology

Understanding ISIM Cards for IMS Networks