The author received his B.S., M.S., and PhD degrees from the Department of Computer Engineering, Pusan National University, Pusan, Korea in 1990, 1992, and 1996, respectively. He was a senior research member of the PEC (Protocol Engineering Center) at ETRI (Electronics and Telecommunications Research Institute) from 1996 to 1998. He has been with the Department of Information and Communication Engineering, Changwon National University, Changwon, Korea, since 1999, where he is currently a professor. His current research interests include communication protocols, the Internet of Things, machine learning, web/mobile applications, and smart cities.