IMS is standardized reference architecture. IMS consists of session control, connection control and an applications services framework along with subscriber and services data. It enables new converged voice and data services, while allowing for the interoperability of these converged services between internet and cellular subscribers. IMS uses open standard IP protocols, defined by the IETF. So users will be able to execute all their services when roaming as well as from their home networks. So, a multimedia session between two IMS users, between an IMS user and a user on the Internet, and between two users on the Internet is established using exactly the same protocol. Moreover, the interfaces for service developers are also based on IP protocols.
The relation between IMS and NGN are connecting xDSL accsess network to an IMS core network as it must supports other type of network technology.
Some of the possible applications where IMS can be used are:
- Presence services
- Full Duplex Video Telephony
- Instant messaging
- Unified messaging
- Multimedia advertising
- Multiparty gaming
- Videostreaming
- Web/Audio/Video Conferencing
- Push-to services, such as push-to-talk, push-to-view, push-to-video
A key point of IMS is that it is intended as an open-systems architecture: Services are created and delivered by a wide range of highly distributed systems (real-time and non-real-time, possibly owned by different parties) cooperating with each other. It is a different approach to the more traditional telco architecture of a set of specific network elements implemented as a single telco-controlled infrastructure.
0 Comment :
Post a Comment