Teletraffic requirements and system aspects for future mobile communications

The target of Next Generation Network (NGN) is to provide Quality of Service (QoS) assurance for demands emerged from different applications of nomadic users with any mobility pattern. The intention of this paper is to bring together the state-of-the-art knowledge in telecommunication networks design areas to improve the quality of NGN system design, and also to bind these different areas in order to understand and foresee specific issues. Proper system design and advanced optimized resource management schemes must be adopted to allow each user be connected to the preferred access network at any instant of time. Vertical optimization of the protocol stack as well as horizontal intearation of different systems are the mandatory points. Moreover, the adoption of the IP protocol for mobile environment and extension of packet-based services to the air interface calls for innovative QoS approaches and advanced performance modelling efforts. These new challenges require the development of new methods of teletraffic theory and the special attention should be paid to traffic and wireless link modelling techniques.