Institute of Information Science, Academia Sinica



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Wireless MediaNets: Application Driven Next Generation Wireless IP Networks

  • LecturerProf. Jenq-Neng Hwang (College of Engineering, University of Washington)
    Host: Dr. Chu-Song Chen
  • Time2010-04-30 (Fri.) 10:30 – 12:00
  • LocationAuditorium
Abstract Thanks to the explosive creation of multimedia contents, the pervasive adoption of multimedia coding standards, the ubiquitous access of multimedia services, the existing best effort IP network infrastructure, originally designed with little real-time QoS requirement, has started to suffer from performance degradation on emerging multimedia networking applications. This inadequacy problem is further deepened by the prevalence of last/first-mile wireless networking, such as Wi-Fi, mobile WiMAX, and many wireless sensors and ad-hoc networks. This can be evidenced by more and more fragmentation of application driven IP-based networks, such as for power grid distribution, for networked security surveillance, intelligent transportation communication and many other sensor networks. To overcome the QoS challenges, the next generation wireless IP networks have to be architected in a top-down manner, i.e., application driven layered protocol design. More specifically, based on the application media data, compression schemes are applied, the subsequent Network, MAC and PHY layered protocols are accordingly enhanced to reach the optimal performance. This is the fundamental concept behind the design of Wireless MediaNets. In this tutorial, I will address the QoS challenges specifically encountered in video over heterogeneous wireless broadband networks, and propose several application driven wireless MediaNet solutions based on effective integration of APP and MAC/PHY layers. More specifically, the congestion control for achieving airtime fairness of video streaming to maximize the link adaptation performance of Wi-Fi, the effective wireless broadcasting over large scale distributed surveillance camera networks or vehicular ad-hoc networks, and the opportunistic multicast of scalable video live streaming over WiMAX. Bio Jenq-Neng Hwang received his Ph.D. degree from the University of Southern California. In the summer of 1989, Dr. Hwang joined the Department of Electrical Engineering of the University of Washington in Seattle, where he has been promoted to Full Professor since 1999. He also served as the Associate Chair for Research & Development in the EE Department from 2003 to 2005. He has written more than 250 journal, conference papers and book chapters in the areas of multimedia signal processing, and multimedia system integration and networking, including a recent textbook on “Multimedia Networking: from Theory to Practice,” published by Cambridge University Press. Dr. Hwang has close working relationship with the industry on multimedia signal processing and multimedia networking. He also co-founded the HomeMeeting company, one of the largest e-learning and video conferencing system developer in Taiwan, and was the main architect to design a commercially available interactive IPTV. Dr. Hwang received the 1995 IEEE Signal Processing Society's Best Journal Paper Award. He is a founding member of Multimedia Signal Processing Technical Committee of IEEE Signal Processing Society and was the Society's representative to IEEE Neural Network Council from 1996 to 2000. He served as an associate editor for IEEE T-SP, T-NN and T-CSVT, and is now an Associate Editor for IEEE T-IP and an Editor for JISE and ETRI. He was the Program Co-Chair of ICASSP 1998 and ISCAS 2009. Dr. Hwang is a fellow of IEEE since 2001.