Toronto Networking Seminar

Accessing Heterogeneous Wireless Networks for Always Best Connected Services

Victor Leung
Department of Electrical and Computer Engineering
 University of British Columbia

Date:  Friday, May 25,  3pm
Location: BA 1220


Wireless networking technologies have progressed rapidly over the past decades to emerge from research laboratories and become an integral part of everyday life in society. Over a short time span of less than twenty years, cellular networks have advanced through three generations. The third generation (3G) personal communication service (PCS) networks that have been rolling out in the new millennium are leading the way in service convergence, by extending not only voice service, but also messaging, web, and even television services to mobile subscribers. At the same time, many license-free wireless networking technologies such as wireless metropolitan area networks (WMANs), wireless local area networks (WLANs) and wireless personal area networks (WPANs) have emerged and are providing strong competitions to PCS offered by traditional wireless carriers. Where the road of progress in wireless networking services will lead us, and what technologies will be embraced in future generation wireless networks, are timely questions that both researchers and practitioners are trying to answer. There is now a strong consensus in the wireless networking technical community that the next generation wireless networks will be evolutionary and will embrace multiple wireless technologies and system components built upon a common IP core network. It is envisaged that advanced subscriber terminals will be equipped with multiple or smart radio interfaces, and will interact with several alternate access networks to provide the subscriber with an "always best connected" (ABC) service that is cognizant of the requirements of the subscriber's current application and the capability and quality of service supported by the diverse access alternatives. The convergent of multiple wireless networking technologies to provide a coordinated service to mobile subscribers can therefore be considered a technological trend that is filling the generation gap in wireless networking. This presentation will describe the features and characteristics of converged wireless networks, elaborate on some of the technical challenges that need to be tackled to make ABC service over converged wireless networks a reality, and describe several novel solutions we have developed to address these challenges. 


Victor C.M. Leung received the B.A.Sc. (Hons.) and Ph.D. degrees in electrical engineering from the University of British Columbia (U.B.C.) in 1977 and 1981, respectively.  From 1981 to 1987, Dr. Leung was a Senior Member of Technical Staff at MPR Teltech Ltd., Burnaby, BC, Canada. In 1988, he was a Lecturer in the Department of Electronics at the Chinese University of Hong Kong. He returned to U.B.C. as a faculty member in 1989, where he currently holds the positions of Professor and TELUS Mobility Research Chair in the Department of Electrical and Computer Engineering, and is a member of the Institute for Computing, Information and Cognitive Systems. He also holds a guest professorship at Jilin University, China. He was a project leader and a member of the Board of Directors in the Canadian Institute for Telecommunications Research, a Network of Centres of Excellence funded by the Canadian Government. His research interests are in the areas of architectural and protocol design and performance analysis for computer and telecommunication networks, with applications in satellite, mobile, personal communications and high speed networks. He has authored or co-authored more than 300 publications in refereed international journals and conferences.  The many academic awards that Dr. Leung has received include the APEBC Gold Medal as the head of the graduating class in the Faculty of Applied Science, UBC, and Natural Sciences and Engineering Research Council Postgraduate Scholarships. Dr. Leung is a Fellow of IEEE and a voting member of ACM. He is an editor of the IEEE Transactions on Wireless Communications, an associate editor of the IEEE Transactions on Vehicular Technology, and an editor of the International Journal of Sensor Networks.  He has served on the committees of numerous international conferences. He is serving as the General Chair of QShine 2007 in Vancouver, BC, Canada, and chairs the Next Generation Mobile Networks Symposium in IWCMC 2007 and 2006. He was the General Co-chair of IEEE/ACM MSWiM'05 in Montreal, PQ, the TPC Vice-chair of IEEE WCNC'05 in New Orleans, LA, and the Local Chair of IWCMC'06.