Ip Multimedia Subsystem Dissertation

 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.The total delay in a call set up/release procedure is the summation of the delay of the nodes along the signaling path.

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We concluded that which one node would be the bottleneck depends on how the traffic is distributed in the networks.

We did the delay analysis firstly by describing the SIP signaling traffic with M/M/1 notation.

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.

Not only was it an infrastructure investment whose costs were hard (or impossible) to pass onto a subscriber, but classic deployment techniques were marred in the complexity and limits of custom hardware, proprietary software, archaic licensing and convoluted trial, roll-out and scaling techniques.

Independent of each other, two things transpired that would transformation our IMS tween almost overnight: The introduction of Network Functions Virtualization (NFV) by a group of worldwide network operators and the release of Project Clearwater, by Metaswitch, to the Open Source Community.A UMTS network consists of three interacting domains: Core Network (CN), UMTS Terrestrial Radio Access Network (UTRAN) and User Equipment (UE).The IP multimedia subsystem comprises all CN elements for provision of multimedia services.By continuing to use this site, you consent to the use of cookies.We use cookies to offer you a better experience, personalize content, tailor advertising, provide social media features, and better understand the use of our services.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.We calculated the delay in each node and gave the waiting time distribution.Then we assumed the traffic to be M/D/1 and gave the delay in each node. It seems only yesterday that the 3GPP gave birth to the IP Multimedia Subsystem and now we are getting ready to celebrate its Sweet Sixteen and turn it loose on the world.Of course, way back in (Release) 2000 we didn’t even have a name for it, so we called it “All IP”.