Ihsan Ullah received his B.S. and M.S. degrees in computer science from the University of Peshawar, Pakistan, in 2001 and 2004, respectively, and his Ph.D. degree in computer engineering from Sungkyunkwan University, Suwon, South Korea, in 2019. From September 2019 to August 2020, he was a Postdoctoral Research Fellow with the Ubiquitous Computing Technology Research Institute (UTRI), Sungkyunkwan University. Since 2020, he has been a Research Professor with the School of Computer Science and Engineering, Korea University of Technology and Education, Cheonan, South Korea. His research interests include data aggregation, data fusion, virtual network embedding, network slicing (5G), the IoT (Internet of Things), artificial intelligence, machine learning, cloud computing, and wireless sensor networks.