IP Multimedia Subsystem designed by the 3 Generation Partnership Project to provide the access networks services and telecommunication services, plans to merge services like multimedia, data and voice conversation under one umbrella. In this research, network based anomaly detection system is proposed by using Genetic Algorithm rules to avoid such attacks like UDP Flooding which cause the DoS a...

IP Multimedia Subsystems (IMS) is a technology leading towards Next Generation Networks (NGN) which has the ability to provide converged service regardless of any access networks. This paper presents a conference call use case application and the realization of the application based on both IMS and non-IMS infrastructure design approaches. This paper also presents our findings in comparing the ...

The IP Multimedia Subsystem (IMS) is becoming the de facto overlay network for enabling the delivery of multimedia services in converged networks. Because it is envisioned that the IMS will experience a considerable growth in the years to come, it is important to verify that the involved resources conforming an IMS deployment deliver the desired performance when the system is operating under st...

This paper presents an experimental framework for implementation of an IMS/NGN reference service scenario by means of open source software. Multiple service enablers are deployed to build this service scenario. Interoperability tests between the deployed IMS entities and user equipment are carried out, as well as performance measurements of signaling overhead and delay of different IMS procedur...

The TISPAN group from ETSI is currently working on the specification a Next Generation Network (NGN), based on the IP Multimedia Subsystem (IMS) as the service control architecture. This NGN provide a extensible platform that supports the delivering of next generation multimedia services with QoS requirements over multiple access network technologies. Nevertheless, the QoS solutions developed b...

Next Generation Networks (NGN) is the evolution of the telecommunication core. The user has to execute multi-pass Authentication and Key Agreement (AKA) procedures in order to get access to the IP Multimedia Subsystem (IMS). This causes overhead on the AAA server and increases the delay of authenticating the user and that is because of unnecessary and repeated procedures and protocols. This pap...

The NGN (Next Generation Network), which can provide advanced multimedia services over an all-IP based network, has been the subject of much attention for years. While there have been tremendous efforts to develop its architecture and protocols, especially for IMS, which is a key technology of the NGN, it is far from being widely deployed. However, efforts to create an advanced signaling infras...

Multimedia multiparty applications on the Internet are commonly supported by specific servers containing all the required functionalities in a centralized manner. The IP Multimedia Subsystem (IMS) is the current paradigm of the Next Generation Network (NGN) model. It provides a set of basic service enablers and functions beyond IP connectivity, such as multimedia session control, presence and g...

The IP Multimedia Subsystem is an architectural framework for delivering multimedia services over an Internet Protocol (IP) network. Originally, it was specified for wireless networks, but has since evolved to incorporate fixed line access as well. It forms part of a Next Generation Network (NGN) which is defined as a packet-based network where the service functionality is independent of the un...