… SIP operation in IP Multimedia Subsystem of UMTS network from … IP Multimedia Subsystem,
we will first introduce how the architecture evolve from GSM to UMTS to support multimedia, …

… (UMTS) is one of the major standards for the thirdgeneration (3G) mobile telecommunications.
In UMTS, the IP multimedia core network subsystem (IMS) provides multimedia services …

… by 3GPP as an overlay on UMTS PS to support IP multimedia services. In paper is shown how
… in UMTS architecture to establish end-to-end QoS for session based multimedia services. …

… multimedia messages, not just text messages. In this article we focus on real-… multimedia
services and the UMTS IP multimedia subsystem (IMS) that enables these services in UMTS. …

In a Universal Mobile telecommunications system IP multimedia subsystem (IMS), even
when an IMS subscriber has passed the packet-switch domain authentication, the IMS …

… UMTS Release 5, the IP Multimedia Subsystem (IMS) ([1],[2]) has been added as a part of the
UMTS to provide IP based multimedia … SIP) [3J based IP multimedia services such as video …

… network and IMS of UMTS: from attaching to UMTS core network (UMTSCN) and making a
… of IP Multimedia services has attracted 3GPP; UMTS (3G network) has adopted IP with QoS …

… (UMTS) can support IP Multimedia services by including the IP Multimedia Subsystem (IMS) …
To use IMS services, a user equipment needs to first authenticate itself with the UMTS and …

… to-end QoS in IP multimedia subsystem of UMTS if DiffServ is used in UMTS core network
and SIP protocol for session setup. Although DiffServ is relatively simple IP QoS mechanism, it …

… as a service of the IP Multimedia Subsystem (IMS) in the current UMTS specification. It is …
that is the most expensive one in the UMTS architecture. This paper proposes a mechanism that …