Faculty of Engineering and Natural Sciences
Resource Allocation for Wireless Video Transmission: Streaming vs Broadcasting
M. Oğuz Sunay
Department of Electrical Engineering
Following the rapid growth of wireless networks and the success of Internet video, wireless video services are expected to be widely deployed in the near future. In this talk, we focus on two possible video applications for cellular networks: streaming and broadcasting. The two applications are quite different in nature and thus require different resource allocation algorithms. For streaming video, we propose a cross-layer optimized joint video rate adaptation and user scheduling scheme where the entire code space is allocated to scheduled users in a time-division multiplexed fashion as is done in 3G 1xEV-DO or HSDPA. Here the goals are maximum QoS for each user, maximum video throughput, and QoS fairness amongst users. A multiple objective optimization framework is developed to determine the best compromise operating point amongst these objectives. For broadcast video on the other hand, QoS optimization for each user is not possible due to the nature of transmission. When video is broadcast using a 3G system, unlike the streaming service, the code space may be divided among multiple layers if scalable video coding is employed. This could potentially be exploited to jointly maximize coverage and average user quality. For such a system, we first investigate the feasibility of using multiple layers for transmission for the 3G system bandwidth. Then, we use multiple objective optimization once again to find the best compromise between maximizing the average received video data-rate and minimizing the basic quality video outage probability.
M. Oğuz Sunay has been a faculty at the Department of Electrical and Electronics Engineering of Koç University, Istanbul, Turkey since January 2001. From 1996 to 1998 he was a Research Engineer at Nokia Research Center, Irving, Texas, USA and from 1998 to 2001 he was a Member of Technical Staff at Bell Laboratories, Lucent Technologies, Whippany, New Jersey, USA. He received his B.Sc. degree from METU, Turkey and his M.Sc. and Ph.D. degrees from Queen's University, Canada. His current research interests include cross-layer design of wireless air interfaces for multimedia services, information theoretic analysis of cooperative networks and wireless peer-to-peer networks, diversity and its efficient utilization in MIMO channels. He has authored numerous articles in these areas at refereed journals and international conferences and has over 25 issued US and European patents. He has served and contributed in various telecommunications standards bodies on cdma2000, 1xEV-DO and 1xEV-DV. Dr Sunay was a guest co-editor for the January 2000 issue of the IEEE Communications Magazine, titled "Telecommunications at the Start of the New Millennium" and served as the co-chair of the Wireless Communications Symposium at the IEEE ICC 2006 conference held in Istanbul. He was an Associate Editor or IEEE Communications Letters in 2000-2005 and an Editor for IEEE Transactions on Wireless Communications in 2004-2006. He is listed in Marquis Who is Who in the World and Who is Who in Engineering.
November 15, 2006, 13:40, FENS G032