Dusit Niyato is a professor in the School of Computer Science and Engineering at Nanyang Technological University, Singapore and a Fellow of the IEEE. Nguyen Cong Luong is a senior lecturer at Phenikaa University, Vietnam. He is also a researcher at the Phenikaa Research and Technology Institute (PRATI). Ping Wang is an Associate Professor at the Department of Electrical Engineering and Computer Science, York University. Zhu Han is a John and Rebecca Moores Professor in the Department of Electrical and Computer Engineering as well as the Computer Science Department at the University of Houston, and a Fellows of the IEEE and AAAS.