Convergence of broadcast and new telecom networks

The demand of the new telecom industry for cost efficient provision of mobile multimedia services is faced with the reality of scarce radio resources, The requirement of spectrum efficiency has driven the development of various digital radio technologies that have been optimized for specific services, namely for broadcast or for mobile communication. However, existing and emerging multimedia services exhibit challenging requirements in terms of asymmetry, interactivity, real-time, and multicast communication. This paper describes an IP based multi-radio infrastructure that enables the co-operation of existing radio networks to combine their capabilities to ensure a spectrum efficient provision of high-quality mobile multimedia sen ices. Further the need for a dynamic allocation of spectrum to radio services is motivated. The basic functionality and the architecture of a multiradio system is outlined, with a special emphasis on the cooperation between different radio systems, Further an evolution path for the convergence of broadcast and new telecom is desribed, starting from todays systems and leading to a fully coordinated system.