Packet-oriented access to cellular networks enables us to deliver multimedia content to mobile users. As cellular networks will continue to deliver circuit switched voice for some time to come, care must be taken to avoid interference between these delivery mechanisms, while maximizing the range of services and the number of users. Smart delivery of multimedia content involving agents running i...

Voice over IP (VOIP) networks have strict Quality of Service (QoS) constraints and require real-time packet delivery which poses a major challenge to IP networks. The Cognitive Packet Network (CPN) has been designed as a Software Defined Network Substrate that provides user-oriented QoS by adaptively routing packets based on online sensing and measurement. We therefore design and evaluate a “Vo...

This paper focuses on the questions of the evolution of mobile communication. Improving GSM networks is a key step in the development towards the 3rd generation of mobile communication systems. In the current article implementation possibilities of IP in the GSM (Global System for Mobile communication) backbone are investigated. Our goal is to justify the theory; applying absolute priority sche...

Voice over IP (VoIP) systems are gaining in popularity as the technology for transmitting voice traffic over IP networks. As the popularity of VoIP systems increases, they are being subjected to different kinds of intrusions some of which are specific to such systems and some which follow a general pattern of IP attacks. VoIP systems pose several new challenges to Intrusion Detection System (ID...

VoIP technology is becoming increasingly important as they gain market share in PSTN technology. In the short run, it is likely that VoIP technology will dominate the telecommunications market. This evolution towards VoIP technology makes sense for improving the VoIP technology efficiency under the auspices of the internet. However, the PSTN still provide voice quality better than the VoIP tech...

In VoIP, proxies are used by end-devices to perform a number of tasks including call setup and routing. Setup and routing is achieved through the exchange of call control messages which are forwarded among all involved proxies as well as the communicating end-devices. This paper will explore the information exchanged in Voice-over-IP (VoIP) call control messages and any possible implications th...