Commonly understood as the next generation networks (NGN), a composite environment of proven telecommunications and Internet-oriented mechanisms has become generally recognized as the telecommunications environment of the future. However, the nature of the NGN environment presents several complex issues regarding quality assurance that have not existed in the legacy environments (e.g., multi-ne...

The IP Multimedia Subsystem (IMS) was developed by a common initiative of the standardization bodies 3GPP and ETSI TISPAN with the aim to provide a platform for fixed and mobile network operators that supports future communication services. In this article we give an overview about the implications that security threats already known from the Internet have on IMS. We analyze the security requir...

IMS is a good candidate to become the service platform for next generation networks (NGN). Among one of its key characteristics is the ability to keep the Internet paradigm of application and transport separation while designing interfaces between the two layers. In IMS there is an interaction between the CSCFs (call session control function), SIP proxies managing the application setup, and the...

The IP Multimedia Subsystems (IMS) that features in Next Generation Networks (NGN) offers the application developer (third party) abilities to map out applications over mobile telecommunication infrastructure. The IMS comes about with APIs useful for mobile application developers to create applications to meet end-users’ demands and comply with the provider’s infrastructure set up at the same t...

With an ever increasing penetration of Internet Protocol (IP) technologies, the wireless industry is evolving the mobile core network towards all-IP network. The IP Multimedia Subsystem (IMS) is a standardised Next Generation Network (NGN) architectural framework defined by the 3 Generation Partnership Project (3GPP) to bridge the gap between circuit-switched and packet-switched networks and co...

Based on the IP technology, the next generation networks (NGN) must overcome the main drawbacks of this technology consisting in the lack of quality of service (QoS), security and mobility management. To ensure a service offer in an NGN environment, a protocol for negotiating a service level can be used. However, most of the existing negotiation protocols allow the establishment of a service le...

Convergence is a hot topic in the communication industry. The wide spread popularity of IP Multimedia Subsystem (IMS) is a clear indication that independent networks will be integrated into a single IP-based infrastructure referred to as Next Generation Networks (NGN) in the near future. The services, network architectures and traffic pattern in NGN will dramatically differ from the current net...

Manageability, the theme for IMS to compete with existing heterogeneous Voice over IP (VoIP) applications, runs over every network element in NGN for security and quality of experience (QoE). Further decomposition of IMS Core Network (CN) has resulted in a rapid increase of signaling traffic. At the same time, the ever rising of applications over signaling, the needs of message validation and s...

IP Multimedia Subsystem (IMS) is becoming the prevailing candidate for managing future mobile multimedia communications, including critical communications such as public safety, emergency professionals and corporate networks. IMS security and privacy has gained much attention in the few last years. The review of recent IMS security activities stresses the inclusion of intermediate nodes in the ...

IMS has been widely recognized as the control and signaling framework for delivering of the rich communication & multimedia services to broadband users. Amongst others, it’s deploying as the service (middleware) platform for interactive and personalized IPTV services. The goal of this paper is to provide a short description and analysis of the (IPTV) use cases that have been selected for design...