QoS Provisioning in Intelligent Vehicular Networks
22 May 2012
Date : 22 May 2012
Time : 11:00 am - 12:00 noon
Venue : Room PQ703, 7/Floor, PQ core, Mong Man Wai Building
The Hong Kong Polytechnic University
Intelligent vehicular networks, which aim at enabling the driving-environment awareness, improving the transportation safety systems, and supporting Quality of Service (QoS) networking services among moving vehicles, are the cornerstone of the next-generation Intelligent Transportation Systems (ITS). High mobility of vehicles and unreliable time-varying wireless channels make the implementation of intelligence and QoS provisioning in vehicular networks significantly challenging. In this talk, we will address the key issues and challenges, as well as the state-of-the-art theories and techniques for the intelligent vehicular networks. In particular, we start with introducing the ITS techniques and their engineering applications, including DSRC, IEEE 802.11p, and Wireless Access in Vehicular Environments (WAVE). We will then focus on the designs and analyses of our newly proposed clustering-based multi-channel communications architecture that can support not only public-safety message delivery, but also a wide range of future multimedia (e.g., video/audio) and data (e.g., e-maps, road/vehicle traffic/weather information) applications. Our proposed scheme integrates clustering with contention-free and/or contention-based medium access control (MAC) protocols. Specifically, the elected cluster head vehicle functions as the coordinator to collect/deliver real-time safety messages within its own cluster and forward the consolidated safety messages to the neighboring cluster heads. We also develop the analytical model to characterize the transmission delay for the consolidated safety messages sent by the cluster-head vehicles. Using this model, we derive the desirable contention-window size, which can best balance the tradeoff between the delay of safety messages and the successful rate of delivering safety messages, satisfying the diverse QoS requirements for intelligent vehicular networks.
Xi Zhang received his Ph.D. in electrical engineering and computer science (Electrical Engineering-Systems) from The University of Michigan, Ann Arbor. He is currently an Associate Professor and Founding Director of Networking and Information Systems Laboratory, Dept. of Electrical and Computer Engineering, Texas A&M University. He was with Networks and Distributed Systems Research Department, AT&T Bell Laboratories, Murray Hills, NJ, and with AT&T Laboratories Research, Florham Park, NJ. Prof. Zhang has published more than 200 research papers. He received U.S. National Science Foundation CAREER Award in 2004. He is an IEEE Communications Society Distinguished Lecturer. He received Best Paper Awards in IEEE GLOBECOM 2007, IEEE GLOBECOM 2009, and IEEE WCNC 2010, respectively. He also received TEES Select Young Faculty Award for Excellence in Research Performance from Look College of Engineering at Texas A&M University in 2006. He is serving or has served as an Editor for the IEEE Transactions on Communications, IEEE Transactions on Wireless Communications, IEEE Transactions on Vehicular Technology, and IEEE Communications Letters; a Guest Editor for two times for IEEE Journal on Selected Areas in Communications (J-SAC), a Guest Editor for IEEE Communications Magazine and IEEE Wireless Communications. He is serving or has served as TPC Chair for IEEE GLOBECOM 2011, TPC Area Chair for IEEE INFOCOM 2012, General Vice-Chair for IEEE WCNC 2013, TPC Vice-Chair for IEEE CCNC 2013, General Co-Chair for INFOCOM 2012 – Workshop on Communications and Control for Sustainable Energy Systems: Green Networking and Smart Grids, Co-Chair for IEEE INOFOCOM 2011 - Workshop on Green Communications and Networking, TPC Co-Chair for IEEE ICDCS 2011 - Workshop on Data Center Performance, Panel/Demo/Poster Chairs for ACM MobiCom 2011, TPC Vice-Chair for IEEE INFOCOM 2010, TPC Co-Chair for IEEE INFOCOM 2009 Mini-Conference, TPC Co-Chair for IEEE GLOBECOM 2008 - Wireless Communications Symposium, TPC Co-Chair for IEEE ICC 2008 - Information and Network Security Symposium, Demo/Poster Chair for IEEE INFOCOM 2008, Student Travel Grants Chair for IEEE INFOCOM 2007.
*** ALL ARE WELCOME ***
Contact: Prof. George Baciu
Tel : 2766-7295 or 2766-7272