Ralf Tönjes is heading the mobile communications group at the University of Applied Science Osnabrueck. He studied communication engineering (Dipl.-Ing.) at the University of Hannover and biomedical engineering (M.Phil.) at the University of Strathclyde in Glasgow. He received a Dr.-Ing. degree in electrical engineering from the University of Hannover. From 1998 to 2005, he was with Ericsson Research, working on future mobile networks and representing Ericsson in standardization. In 2005 Ralf Tönjes joined the University of Applied Sciences Osnabrück as full professor for Mobile Communications. He (co-)authored more than hundred scientific publications. He chairs the German VDE Conference on Mobile Communications and is a TPC member of several international conferences. His current research interests include mobile and wireless communication networks, Internet of Things, and data security.