Dr.Bernhard H.Walke is the founder and member of the Steering Committee of the European Personal and Mobile Communications Conference (EPMCC) and a cofounder and member of the Steering Committee of the European Wireless Conference (EW). Since 1999 he has been a member of the Advisory Board of Wireless Communications. Since 2001, he has been an elected chair for Working Group 4 “Spectrum Issues, New Air-Interfaces and Ad-Hoc Networking” of the Wireless World Research Forum. Dr. Stefan Mangold has worked for ComNets, Aachen, Germany and since 2003 has been with Philips Research, Briarcliff Manor, new York, USA, where he is currently conducting further research in the field of wireless communication networks, radio resource management and regulation. His research interests include social science and game theory, agile “cognitive” radio, spectrum etiquette and ontology engineering.