The IP Multimedia subsystem (IMS) based on SIP as mechanism signalling and interfaces with other servers using OSA (Open Service Access) and CAMEL (Customized Applications for Mobile network Enhanced Logic).Is responsible for the interconnection of IP packets with other network, IMS support data communication services, voice, video, messaging and web-based technologies. In this work we present ...

The NGN convergence services will play an important role to consolidate the deployment of NGN at the initial phase. At the initial stage, scenario-based approach is expected to act as an efficient way to pre-design before the actual implementation of NGN, the subject for providing the convergence services to the customers. This paper first proposes a deployment model of the NGN convergence serv...

introduction: detection of cryptosporidium and giardia parasites in water samples is usually performed by us environmental protection agency 1623 method. nevertheless, the usepa1623 method still need improvement, to prevent and control the water borne parasitic disease. therefore, we undertook the present study. materials and methods: totally 48 surface water samples were collected. four sample...

This paper presents a summary of our experiences in developing a software tool for IP/MPLS NGN traffic engineering computations. The developed NGN software consists of three main modules. Firstly, the NGN design module can be used to help network engineers find the minimum link capacity needed for NGN unicast (e.g. VoIP service) and multicast service (e.g. VDO conference) provision while mainta...

In this article, we summarize the security threats targeting SIP proxy servers or other infrastructures in NGN by misusing a specific signaling authentication mechanism, which has been proposed in RFC 4474 (Peterson and Jennings, 2006). This mechanism is designed to authenticate inter-domain SIP requests based on domain certificates to prevent identity theft. Nevertheless, despite its contribut...

A novel mobile peer-to-peer (MP2P) in cellular networks is presented in this paper. The proposed architecture is based on Session Initiation Protocol (SIP) that is part of the IP Multimedia Subsystem (IMS) in the third-generation mobile cellular networks. In this architecture, P2P control messages are transported in SIP messages, so called P2PoverSIP. By way of SIP, the operators can have contr...

IMS (IP Multimedia Subsystem) has become the basis of fixed-mobile convergence for telecommunication operators. Compared to previous networks, IMS presents huge advantages, especially in terms of its ability to offer all types of services (voice and data). Nevertheless, with these advantages comes a whole new package of resilience (dependability & security) challenge, e.g., attacks, human mista...

(UAC) like characteristics of an S-CSCF. To show its efficiency, the session transfer delay and the traffic cost of RSA session transfer are investigated and compared with those of existing session transfer applications, including Assured and Consultative session transfers, by practically considering multiple session transfer failures. It is shown that RSA session transfer can further improve u...

After 3GPP had selected SIP as the signaling protocol for IMS, it is expected that SIP plays an important role in IP multimedia services. But, since SIP-based services are offered over the internet, there are security threats inherited from the internet environment. There are also new security threats because new techniques have been introduced to deliver multimedia traffic over the internet. I...

The aim of this paper is to analyze the influence of new network architectures, like UMTS or NGN, over Intelligent Network evolution. First, it identifies the main drivers that can modify service platform paradigm, both from technical and market perspective. Moreover, those drivers cause the existence of alternative ways of designing and deploying value added services, like Open Service Archite...