Riaz Hussain received a B.S. degree (Hons.) in electrical engineering from the University of Engineering and Technology, Peshawar, Pakistan, a Master's degree in networks from North Carolina State University, Raleigh, NS, USA, and a Ph.D. from the COMSATS Institute of Information Technology, Islamabad, Pakistan, in 2013. His dissertation was entitled "Modeling, Analysis and Optimization of Vertical Handover Schemes in Heterogeneous Wireless Networks". He is currently an Assistant Professor with the Department of Electrical Engineering, COMSATS University, Islamabad. His current research interests include cognitive radio networks, device-to-device communication, and Internet of Things.