IP Multimedia Subsystem

The IP Multimedia Subsystem (IMS) is an open, standardised, operator friendly, Next Generation Networking (NGN) multi-media architecture for mobile and fixed IP services. It's a VoIP implementation based on a 3GPP variant of SIP, and runs over the standard Internet protocol (IP). It's used by telecom operators in NGN networks (which combine voice and data in a single packet switched network), to offer network controlled multimedia services.

Related Topics:
Next Generation Networking - IP - VoIP - 3GPP - SIP - IP - Telecom operators - Multimedia

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The aim of IMS is not only to provide new services but to provide all the services, current and future, that the Internet provides. In addition, users have to be able to execute all their services when roaming as well as from their home networks. To achieve these goals the IMS uses open standard IP protocols, defined by the IETF. So, a multi-media session between 2 IMS users, between an IMS user and a user on the Internet, and between 2 users on the Internet is established using exactly the same protocol. Moreover, the interfaces for service developers are also based in IP protocols. This is why the IMS truly merges the Internet with the cellular world; it uses cellular technologies to provide ubiquitous access and Internet technologies to provide appealing services.

Related Topics:
Internet - Roaming - IETF

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