Towards Cognitive Telecommunication Networks

This paper presents an overview of the state-of-the-art technologies for future communication networks in order to satisfy complex and ever increasing user requirements. The new communication networks will be heterogeneous, embrace cognitivity and cross-layer protocol designs and permit interoperability between cellular systems, wireless local area networks, wireless personal area networks, worldwide interoperability for microwave access (WiMax) systems, sensor networks and digital audio and video broadcasting services.