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Communication Networks and Services Research Conference (CNSR 2006) |
CNSR2006 Tutorials
Wireless Mesh Networks
Paul A.S. Ward Assistant Professor Department of Electrical and Computer Engineering Faculty of Engineering, University of Waterloo Waterloo, Ontario, Canada, N2L 3G1 Phone: (519) 885-1211 Ext. 3127 Fax: (519) 746-3077 x3127 E-mail: pasward  ccng.uwaterloo.caHome Page: http://www.ccng.uwaterloo.ca/~pasward/ Dr. Paul A.S. Ward is an Assistant Professor in the Department of Electrical and Computer Engineering at the University of Waterloo, where he teaches senior undergraduate and graduate courses in networks and distributed systems. His research interests span the areas of distributed systems and computer networks. In distributed computing his work focuses on distributed-application management, and more generally on dependable and self-managing distributed systems. In networks his interest lies in wireless data networks, and more particularly in ad hoc, wireless mesh, and delay-tolerant networks. Prior to pursuing his Ph.D. he worked in both the hardware and software industries, covering the range from electronic-parking-meter design to developing the fast parallel load utility for the DB2 database system. Dr. Ward has a BScEng in Electrical Engineering from the University of New Brunswick and a Ph.D. in Computer Science from the University of Waterloo. He is a member of the IEEE, including the Computer and Communications Societies, as well as a Professional Engineer. Advances in Wireless Local Area NetworksWi-Fi applications have blossomed tremendously over the last few years. What started out as cable replacement for static desktops in indoor networks has been extended to fully mobile broadband applications involving wide-area outdoor community networks, moving vehicles, high-speed trains, and even airplanes. Wi-Fi data rates have also continued to increase from 2 to 54 Mbit/s with current 802.11n proposals topping 500 Mbit/s. This development may eventually render wired Ethernet redundant in the local network.When wireless LANs were first deployed, they give laptop and PDA users the same freedom with data that cellphones provide for voice. However, a wireless LAN need not transfer purely data traffic. It can also support packetized voice and video transmission. People today are spending huge amounts of money, even from office to office, calling by cellphones. With a wireless LAN infrastructure, it costs them a fraction of what it will cost them using cellphones or any other equipment. Thus, voice telephony products based on wireless LAN standards have recently emerged. A more compelling use of wireless LANs is in overcoming the inherent limitations of wireless wide area networks (WANs). Current third-generation (3G) mobile telephony data rates have the potential to increase up to 2 Mbit/s whereas wireless LANs already offer data rates of up to 54 Mbit/s and unlike 3G, operate on unlicensed frequency bands. This has led some technologists to predict that eventually we are more likely to see dense urban broadband wireless LANs that are linked together into one network rather than widespread use of high-powered WAN handsets cramming many bits into expensive and narrow slices of radio spectrum. This tutorial provides a concise discussion on current and emerging wireless LAN technologies, emphasizing key concepts and underlying principles rather than factual descriptions. In addition, many carefully prepared illustrations are used throughout the tutorial to enhance the textual explanations. By distilling details down to the basic issues needed for intuitive understanding, both serious and novice tutorial participants are able to gain valuable insights into the exciting field of high-speed wireless communications and mobile computing. To encourage tutorial participants to fully explore the topics covered, useful Internet resources and references have been included.
Speaker: Dr. Benny Bing Organization: Georgia Institute of Technology Address: 777 Atlantic Drive, Atlanta GA 30332-0250, USA Phone/Fax: 404-3850271 Email: benny ece.gatech.eduhttp://users.ece.gatech.edu/~benny Biography of Speaker Benny Bing is an associate director of the Georgia Tech Broadband Institute. He has published over 40 papers, 10 books, and 1 book chapter. His publications have also appeared in the IEEE Spectrum. His books on wireless networks are highly regarded by many technology visionaries. They contain forewords from both chairmen of the IEEE 802.11 Working Group since its inception, the inventor of Internet technology, and the inventor of the first wireless protocol. In early 2000, his groundbreaking book on wireless LANs was adopted by Cisco Systems to launch the Cisco-Aironet Wi-Fi product. The product has since enjoyed phenomenal success, dominating the corporate arena and capturing over 60% of the Wi-Fi market share. He was subsequently invited by Qualcomm Inc. in San Diego, CA to conduct a customized course on wireless LANs for its engineering executives. He was again invited to conduct a similar course for the Office of Information Technology. In 2002, his edited book on wireless LANs was extensively reviewed by the IEEE Communications Magazine, IEEE Network, and ACM Networker, the first time a book has been reviewed by all three journals. He is currently an editor for the IEEE Wireless Communications Magazine, and has also guest edited for the IEEE Communications Magazine and the IEEE Journal on Selected Areas on Communications. In addition, he was featured in the MIT Technology Review in a special issue on wired and wireless technologies as well as the Atlanta Business Chronicle and the IEEE Spectrum. He has served on the wireless networking panel for National Science Foundation (NSF) and was selected as one of the 10 best wireless designers in the United States by Building Industry Consulting Services International (BICSI), a 22,000-industry member telecommunication association based in Tampa, Florida. He was invited by NSF to participate in an NSF-sponsored workshop on "Residential Broadband Revisited: Research Challenges in Residential Networks, Broadband Access and Applications", held on October 2003. He is also a frequent tutorial presenter at several IEEE Communications Society flagship conferences such as IEEE Infocom and IEEE Globecom. He is a recipient of the Lockheed-Martin Fellowship and a best paper award at the 1998 IEEE International Conference on ATM. He is a Senior Member of IEEE and has over 100 international research citations to his name. His current research interests include broadband access, wireless LANs, cognitive radio, mobile TV, and queueing theory. Broadband Wireless Access - The Next Wireless RevolutionBroadband wireless access is the third wireless revolution, after cellphones (1990s) and Wi-Fi (2000s). It is viewed by many carriers and cable operators as a "disruptive" technology and rightly so. The broadcast nature of wireless transmission offers ubiquity and immediate access for both fixed and mobile users, clearly a vital element of next-generation quadruple play (i.e., voice, video, data, and mobility) services. Unlike wired access (copper, coax, fiber), a large portion of the deployment costs is incurred only when a subscriber signs up for service. An increasing number of municipal governments around the world are financing the deployment of multihop wireless networks with the overall aim of providing ubiquitous Internet access and enhanced public services. This tutorial will provide a comparative assessment of the key issues and technologies underpinning promising broadband wireless access solutions such as 802.16 (Wi-Max), long-range/multihop 802.11 (Wi-Fi), wireless DOCSIS, 3G/4G, mobile TV, digital TV broadcast, 802.20 (mobile broadband), 802.21 (media independent handoff and interoperability), and the emerging 802.22 (wireless regional area networks) standard. Key topics include licensed and unlicensed spectrum consideration; reliable physical layer transmission using multiple antennas; multichannel medium access protocols with QoS provisioning; wireless access topologies: point-to-point, point-to-multipoint, peer-to-peer multihop (mesh); wireless multimedia services: wireless IP-TV, wireless VoIP; mobility; cognitive radio technologies; advanced wireless security; wireless/wireline integration.Speaker: Dr. Benny Bing Organization: Georgia Institute of Technology Address: 777 Atlantic Drive, Atlanta GA 30332-0250, USA Phone/Fax: 404-3850271 Email: benny ece.gatech.eduhttp://users.ece.gatech.edu/~benny Biography of Speaker Benny Bing is an associate director of the Georgia Tech Broadband Institute. He has published over 40 papers, 10 books, and 1 book chapter. His publications have also appeared in the IEEE Spectrum. His books on wireless networks are highly regarded by many technology visionaries. They contain forewords from both chairmen of the IEEE 802.11 Working Group since its inception, the inventor of Internet technology, and the inventor of the first wireless protocol. In early 2000, his groundbreaking book on wireless LANs was adopted by Cisco Systems to launch the Cisco-Aironet Wi-Fi product. The product has since enjoyed phenomenal success, dominating the corporate arena and capturing over 60% of the Wi-Fi market share. He was subsequently invited by Qualcomm Inc. in San Diego, CA to conduct a customized course on wireless LANs for its engineering executives. He was again invited to conduct a similar course for the Office of Information Technology. In 2002, his edited book on wireless LANs was extensively reviewed by the IEEE Communications Magazine, IEEE Network, and ACM Networker, the first time a book has been reviewed by all three journals. He is currently an editor for the IEEE Wireless Communications Magazine, and has also guest edited for the IEEE Communications Magazine and the IEEE Journal on Selected Areas on Communications. In addition, he was featured in the MIT Technology Review in a special issue on wired and wireless technologies as well as the Atlanta Business Chronicle and the IEEE Spectrum. He has served on the wireless networking panel for National Science Foundation (NSF) and was selected as one of the 10 best wireless designers in the United States by Building Industry Consulting Services International (BICSI), a 22,000-industry member telecommunication association based in Tampa, Florida. He was invited by NSF to participate in an NSF-sponsored workshop on "Residential Broadband Revisited: Research Challenges in Residential Networks, Broadband Access and Applications", held on October 2003. He is also a frequent tutorial presenter at several IEEE Communications Society flagship conferences such as IEEE Infocom and IEEE Globecom. He is a recipient of the Lockheed-Martin Fellowship and a best paper award at the 1998 IEEE International Conference on ATM. He is a Senior Member of IEEE and has over 100 international research citations to his name. His current research interests include broadband access, wireless LANs, cognitive radio, mobile TV, and queueing theory. Radio Resource Management Techniques For QOS Provisioning In Wireless Cellular NetworksAbstractNew generations wireless cellular networks, including 3G and 4G technologies, are envisaged to support more mobile users and a variety of wireless multimedia services. With an increasing demand for wireless multimedia services, effective Radio Resource Management (RRM) is needed to improve system performance by maximizing the overall system capacity and maintaining the Quality of Service (QoS) of multimedia traffic. In the presence of multiple QoS requirements for different multimedia traffic, the key problem in the design of a multimedia wireless system is to balance the two opposing objectives of the network operator (or service provider) and mobile users. The former wants to achieve high system utilization so that more users can be accommodated by the system and more revenue can thus be obtained while the latter wants to receive better QoS. In such systems, QoS guarantees are required at three different levels: (i) at the connection-level, users expect that the new call blocking probability and handoff call dropping probability be small, (ii) at the class-level, constraints might be placed on how the call rejection (blocking or dropping) probabilities of various classes of calls may be related, and (iii) at the packet-level, users require guarantees on maximum packet delay, delay jitter and packet dropping probability. In this tutorial, we first present a comprehensive overview of the next generation wireless cellular networks and limitations in such networks. We then explain the importance of existing an effective RRM technique that overcomes the limitations of wireless cellular networks and maintain service continuity with QoS guarantees to the multimedia services users. RRM components are then discussed in terms of QoS that are classified at three different levels. Finally, we presents two case studies that integrate RRM components such as call admission control and bandwidth reservation and adaptation, to provide seamless handoffs to mobile users under hard constraints at both the connection and class levels. Biographical Sketch Nidal Nasser (S'00-M'04) received his B.Sc. and M.Sc. degrees with Honors in Computer Engineering from Kuwait University, Kuwait, in 1996 and 1999, respectively. He obtained his Ph.D. in the School of Computing of Queen's University, Canada, in October 2004. In December 2004, he joined the Department of Computing and Information Science at University of Guelph, Ontario, Canada, where he is an Assistant Professor. Dr. Nasser has authored several journal publications, refereed conference publications and three book chapters. He is presently severing as a Vice Chair for first IEEE International Workshop on eSafety and Convergence of Heterogeneous Wireless Networks (eSCo-Wi 2006). He is the workshop organizer and Co-Chair of the first IEEE International Workshop on Heterogeneous Wireless Networks: Resource Management and QoS (HWN-RMQ 2006). He has served as a Co-Chair of the technical program for the IEEE International Workshop on Radio Resource Management for Wireless Cellular Networks (RRM-WCN 2005) and the IEEE International Symposium on Heterogeneous Wireless Networks (ISHWN 2005). He has been a member of the technical program and organizing committees of several conferences and workshops. His current research interests include, multimedia wireless cellular networks, wireless sensor networks and heterogeneous wireless data networks interconnection, with special emphasis on the following topics, radio resource management techniques, performance modeling and analysis and provisioning QoS at connection level, class level, and packet level. Dr. Nasser is a member of the IEEE (Communications Society and Computer Society). He received Fund for Scholarly and Professional Development Award in 2004 from Queen's University. [Last Revised: 2006 March 15] |
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