Klaus Doppler joined Nokia in 2002. He has contributed to Nokia’s 4G, 5G and Wi-Fi research in multiple roles. Currently, he is heading the Connectivity Lab in Nokia Bell Labs and his research focus is on indoor networks. In the past, he has been responsible for the wireless research and standardization (4G, 5G, Wi-Fi) in Nokia Technologies, incubated a new business line, contributed to Nokia’s radio technology vision and has led various research projects. He has pioneered research on Device-to-Device Communications underlaying LTE networks. Klaus received his Ph.D. from Helsinki University of Technology, Finland in 2010 and his MSc. in Electrical Engineering from Graz University of Technology, Austria in 2003. He has more than 75 pending and granted patent applications, and he has published 30 journal and conference publications and book chapters and received several inventor awards at Nokia.