MARIA KOUTSOPOULOU, ALEXANDROS KALOXYLOS, ATHANASIA A1-ONISTIOTI, AND LAZARUS MERAKOS, COMMUNICATION NETWORKS LABORATORY, UNIVERSITY OF ATHENS KATSUYA KAWAMURA, DOCOMO COMMUNICATIONS LABORATORIES EUROPE GMBHP ABSTRACT: The Current technology in mobile telecommunication networks and the Internet arc about to alter existing business models. These different worlds come together and create an open market, where a large number of independent service providers/services will offer their services to users with a limited number of network providers. At the same time, existing 01 network technologies and the definition of new concepts require new high-level and comprehensive solutions in many areas of technology. charging, accounting, and flexible and efficient payment methods. This study article looks at the key concepts of these processes, and the requirements they set for network infrastructure. This document presents the latest efforts made by the certification bodies in the telecommu...