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The CAMEL and the IMS are representative service platforms in the circuit switched (CS) and packet switched (PS) domain. The integration of the CAMEL and the IMS will bring tremendous benefits to the network operators and end users. Many researchers invest in investigating the mechanism of invoking the CAMEL service from the PS domain, however, there are few studies about the mechanism of invoking...
The IP Multimedia Subsystem (IMS) defined by the 3rd Generation Partnership Project (3GPP) and 3GPP2 provides a platform for the provision of multimedia services with quality of service (QoS). In addition, this service architecture allows third-party vendors to create advanced multimedia and multisession services across wireless and wireline network access. The Session Initiation Protocol (SIP) supports...
This paper, in accordance with the authors' continuing research investigates the effect of adding extra servers in Session Initiation Protocol (SIP) signaling network on session setup delay in the IP Multimedia Subsystem (IMS). The effect of applying more than one server in reducing waiting time in each of the nodes of the system is previously investigated by the authors in and applying more servers...
The IP multimedia subsystem is a basis for a significant new architecture which offers network operators the opportunity to expand their services, integrating voice and multimedia communications and delivering them into new environments with new purposes. The IMS is an overlay network on top of IP that uses SIP as the primary signaling mechanism. Using IMS bears several new security challenges. In...
As the next generation networks promise network convergence with services for both static and mobile networks, the research focus is converging towards standardizing a common infrastructure for all-IP networks. IP Multimedia Subsystem (IMS) is a recent initiative, which outlines a service delivery platform (SDP) framework. A flexible and robust QoS management system for IMS is essential to ascertain...
Multimedia services delivery in converged IP networks using IMS, concentrates on providing capabilities to ensure the best quality of service. We have designed a set-top box which provides feedback in IMS architecture to ensure end-to-end QoS and moreover, enables the functionalities of regional gateway for a home network.
Though all IP networks based on IP technology have been previously proposed and are in the realization phase, ways to provide voice services have not yet been sufficiently studied. In this paper we define the full IP integrated mobile network, an architecture capable of providing voice and other services over IP, and we discuss its advantages and possibilities.
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