Professor Hsiao-Hwa Chen is the Director of the Institute of Communications Engineering at the National Sun Yat-Sen University, Tawian. Professor Mohsen Guizani is currently an Associate Professor at the Electrical and Computer Engineering department of the University of Missouri-Columbia. Prior to joining the University, he was with the Faculty of Computer Engineering Department at the University of Petroleum and Minerals, Saudi Arabia. His research interests include Computer Networks, Optical Interconnection Networks for Massively Parallel Computers, Design and Analysis of high-speed network protocols, performance evaluation of computer systems, and wireless communications and networking. He served as a guest editor in the International Journal of Computer Systems and Networks, special issue on "ATM Switching/Networking Architectures and Performance", a guest editor of a special issue in the INFORMATICA Journal on "Design Issues of Gigabit Networking", and a guest editor of a special issue of the International Journal of Communication Systems on "Wireless Local Loops and Wireless ATM Networks".