When IMS was deployed, it was as a complete offering delivered entirely by a single large equipment vendor and at price points that simply didn’t make sense.
Let’s face it, IMS is important - but to the network operator.
Introduction 5 Fournit un réseau IP multiservices et multi-accès qui offre aux utilisateurs la possibilité d’établir dessessions multimédias.
Présente une couche de contrôle commune à tous type de réseau.
Supporting its newly minted acronym, the first IMS specifications were frozen in March 2002 under TS22.228 and promised a world where decoupled signaling and media services were delivered from highly decomposed network functions with well-defined (predominantly SIP-based) reference interfaces, providing modular scalability while eliminating the classic application stovepipes. At the age of 5, IMS was accepted into ETSI to be part of the Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN) curriculum.
Ip Multimedia Subsystem Dissertation
Back then, each and every stovepipe was dominated by a large vendor who dictated every component in the service chain, often compelling network operators to employ expensive, sub-par, components while frequently forcing them to deploy more than one variant of the same product. IMS now evolved not only in the Wireless arena but simultaneously in the Fixed-Line space.
Once hit, the functional entity provides some service and then forwards the traffic on.
We counted the hit times of each functional entity and identified the bottlenecks in different scenarios.
Standardisé par le 3GPP, 3GPP2, groupe TISPAN de l’ETSI, OMA, ... Architecture IMS 8 A la manière de l’approche NGN, l’architecture IMS reprend une approche en couches.
Structurée en quatre couches fondamentales : Accès Transport Contrôle et session Service et application Architecture IMS 9 Architecture IMS 10 couche Accès : renferme tout type d’accès haut débit comme WLAN, UTRAN, x DSL, etc.