Bio: Qingwen Liu received the B.S. degree in electrical engineering and information science in 2001, from the University of Science and Technology of China (USTC). He currently pursues his Ph.D. degree in the Department of Electrical and Computer Engineering at the University of Minnesota (UMN). His research interests lie in the areas of communications, signal processing, and networking, with emphasis on cross-layer analysis and design for quality of service support to multimedia applications over wired-wireless networks.