In recent years, Internet of Things (IoT) and Cloud Computing are the hottest issues of Future Internet. However, there is a lack of common fabric for integrating IoT and Cloud. In telecommunications, the IMS (IP Multimedia Subsystem), based on the All-IP and Open Services Architecture, has been regarded as the trend for Next Generation Network (NGN). The IMS communication platform is the most ...

Next Generation Network (NGN) is envisioned to be an inter-working environment of heterogeneous networks of wired and wireless access networks, PSTN, satellites, broadcasting, etc., all interconnected through the service provider’s IP backbone and the Internet. NGN uses multiple broadband, QoS-enabled transport technologies and servicerelated functions independent from underlying transport-rela...

Customary network migration to Next Generation Networks (NGN) is due to service integration and low cost of the offered services in NGN. NGN is based on an IP/MPLS backbone through which all traffics pass. Besides, different mobile generations up to R99 UMTS are all based on the circuit switch systems. Thus the connections to NGN may cause some challenges. In this paper, to provide these connec...

Essential feature of New Generation Networks (NGN) is the availability of many new services offered by several different players. Different applications and services have their own authentication method and use different credentials, more reliable, flexible and easy-to-use methods are needed. In this paper we concern about different security vulnerabilities found in existing system and gives po...

Angelos Keromytis is an associate professor with the Department of Computer Science at Columbia University and head of the Network Security Lab. He is interested in all aspects of systems and network security. He received his Ph.D. from the University of Pennsylvania and his B.Sc. from the University of Crete. v o I c e o v e r I p ( v o I p ) a n d I n t e r n e t Multimedia Subsystem (IMS) te...

Next Generation Networks (NGN) has a major impact on existing communication technology. The main goal of Next Generation Networks is to give a greater flexibility to the users to access the desired services from the available heterogeneous networks at anytime, anywhere vigorously with the concept of generalized mobility. Mobility management is one of the crucial functions in NGN. It is very muc...

Intrusion Detection has been a body of research and development focusing on the development of techniques and products to block malicious activity. In parallel, automated vulnerability assessment tools have been proposed to provide a base ground for estimating the security level of a given infrastructure at a certain period of time. This paper explores the basic limitations of these two fundame...

NGN(Next-Generation Network) structure has been considered from various points of view as all IP wire/wireless integration network, based on all optical backbone network in general. In this research, the mid-term and long-term strategies of view on NGN were explained, as well as wire/wireless network integration, trends of standardization protocols, access gateways and softswitches in NGN deplo...

The development and deployment of the Next Generation Network (NGN) is important for public network carriers as for them it could be an innovative and effective way to differentiate by offering a number of various value-added services at a lower cost, and consequently survive and even prosper in a highly competitive market. It is predicted that the convergence of services, applications and netw...

Within the technological framework of Information and Communication Technologies (ICT), consumers are currently requesting multimedia services with simplicity of use, reliability, security and service availability through mobile and fixed access. Network operators are proposing the Next Generation Networks (NGN) to address the challenges of providing both services and network convergence. Apart...