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Tutorial 1 T1
Peer-to-Peer Networking
by Professor Raouf Boutaba, University of Waterloo, Canada

Abstract: The past few years have witnessed the emergence of Peer-to-Peer (P2P) systems as a means to further facilitate the formation of communities of interest over the Internet in all areas of human life including technical/research, cultural, political, social, entertainment, etc. P2P technologies involve data storage, discovery and retrieval, overlay networks and application-level routing, security and reputation, measurements and management. This tutorial will give an appreciation of the issues and state of the art in Peer-to-Peer Networking. It will introduce the underlying concepts, present existing architectures, highlight the design requirements, discuss the research issues, compare existing approaches, and illustrate the concepts through case studies. The ultimate objective is to provide the tutorial attendees with an in-depth understanding of the issues inherent to the design, deployment and operation of large-scale P2P systems.

Biography: Professor Dr. Raouf Boutaba is an Associate Professor in the School of Computer Science of the University of Waterloo. Before that he was with the Department of Electrical and Computer Engineering of the University of Toronto. Before joining academia, he founded and was the director of the telecommunications and distributed systems division of the Computer Science Research Institute of Montreal (CRIM). Dr. Boutaba conducts research in the areas of network and distributed systems management and resource management in multimedia wired and wireless networks. He has published more than 150 papers in refereed journals and conference proceedings. He is the recipient of the Premier's Research Excellence Award, the NORTEL Networks research excellence Award and several Best Paper awards. He is a fellow of the faculty of mathematics of the University of Waterloo and a distinguished lecturer of the IEEE Communications Society. Dr. Boutaba is the Chairman of the IFIP Working Group on Networks and Distributed Systems, the Vice Chair of the IEEE Communications Society Technical Committee on Information Infrastructure, and the Director of standards board of the IEEE Communications Society. He is the founder and acting editor in Chief of the IEEE eTransactions on Network and Service Management, on the advisory editorial board of the Journal of Network and Systems Management, on the editorial board of the KIKS/IEEE Journal of Communications and Networks, the editorial board of the Journal of Computer Networks and the Journal of Computer Communications. He acted as the program chair for the IFIP Networking conference and the IEEE CCNC conference, and a program co-chair for the IEEE/IFIP NOMS, IFIP/IEEE MMNS, IEEE FIW, IEEE ACC and IEEE ICC symposia. Dr. Boutaba teaches computer networks and distributed systems and conducts research in the area of resource management in wired and wireless networks


Tutorial 2 T2
INTERNET - A Secure Foundation for Mobile Payments
by Dr. Nick-Naser Manochehri, Dr. Nazar Elfadil & Professor, Dr. Guy Omidyar

Abstract: Internet, Mobile and Wireless Protocols, Architectures, Flow and Congestion Control, Mobile and Electronic-commerce, Smart Security, Biometric and Smart Card Authentication, Network Security and Mobile Payment System.

Mobile phone users are already familiar with using their phones to pay for products such as games, ring tones and other digital content. Mobile phones and mobile devices are now being used to pay for products at a physical point of sale (POS). The ever increasing availability of new, more capable mobile devices and new payment technologies that make such transactions possible offers benefits to both consumers and businesses. The success of mobile payments is contingent on the same factors that have fuelled the growth of physical world non-cash payments, namely: security, interoperability, privacy, global acceptance, and ease of use. Furthermore, E-commerce facilitates number of organizations to reduce supplier cost and increase profits. In the late 1990s, it was predicted that Mobile technology would revolutionize E-business so that in the near future businesses will move from E -to M-commerce. It was predicted that by 2005 billions of dollar would be spent on wireless devices. The question is M-commerce happening? Will M-commerce live up to the expectations? M-commerce represents considerable new opportunities for all enterprises. M-commerce has its own specific characteristics separate from E-commerce. Paying for goods and services from mobile phones or personal digital assistance (PDA) equipped with wireless LAN (WLAN) connection involve many partners and operators. There are technological, organizational, cultural, technical, and business issues to consider. Migration from E-commerce to M-Commerce and an overview and fundamental issues in Mobile Payment System (MPS) will be presented. In addition, factors that effect the introduction of a successful universal mobile payment system that increases the interest and general distribution of m-commerce will be discussed. In addition, integration of fixed and portable wireless access into IP networks presents a cost effective and efficient way to provide seamless end-to-end connectivity and ubiquitous access in a market where demands on Mobile Internet have grown rapidly and predicted to generate billions of dollars in revenue in upcoming years. The deployment of broadband IP-based with broadband wireless access networks are becoming increasingly important. Fixed core IP networks are constructed with the move to IP over Dense Wave Division Multiplexing. Global solutions could be reached with integration of satellites with terrestrial providers. Together, they can expand businesses in Mobile- and Electronic-Commerce and trading for many years to come. This tutorial also addresses the procedure to proactively secure communication channels between non-trusted entities and how to construct a secure foundation for Mobile payments.

Biography: Dr. Nick-Naser Manochehri received his Ph.D. in Applied Technology and Training, from the University of North Texas. He was teaching and designing coursework in the area of Information Technology and Telecommunications at the center for learning at the SBC Communications Inc. in USA till September 2003. He is currently an assistant professor in the department of Information Systems at the Sultan Qaboos University in Oman. His research area of interest includes: Data Communications and Networking, Mobile Commerce, Network Security, Web-based learning, and transfer of training.

Dr. Nazar Elfadil received his Ph.D. in Electrical/ Computer engineering, from University Technology, Malaysia. He has been an assistant professorial lecturer at Nottingham University till August 2003. He is currently an assistant professor in the Department of Electrical and Computer Engineering at Sultan Qaboos University in Oman. His research area of interest includes: network security, knowledge engineering, and Artificial intelligence.

Professor, Dr. Guy Omidyar received the D.Sc. in Electrical Engineering from George Washington University. He has been an associate professorial Lecturer at George Washington University and a professor invite at University de Versailles-Saint-Quentin. He was professor in the Department of Electrical and Computer Engineering at Sultan Qaboos University in Oman and National University of Singapore NUS. He lectures extensively on theory and practice of mobile and wireless communications and optical networks. He was a senior program manager in advance networking operation at Computer Sciences Corporation, Mitre corporation, riverside research institute, Magnovox Government data system. He was a science advisor for US. Internal Revenue Service and conducted research at the Research Institute of Illinois Institute of Technology. He worked at Bell Communications Research and contributed to the standardization and was a technology advisor at Telecom Egypt. He was chairman of IEEE communications society of communication system integration and modeling committee. He is the steering committee chair of Mobile and Wireless Communication Network (MWCN) www.ctr.kcl.ac.uk/mwcn2005/default.asp and International Conference on Optical Communications and Networks (ICOCN) www.icocn2005.org and Wireless and Optical Communications Network (WOCN) www.wocn2005.org and International Conference on Internet (ICI) www.ici2005.org conferences. He was director of international affairs office at Institute for Communications Research in Singapore and he is Chairman of IFIP TC6 WG 6.8.

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Tutorial 3 T3
Optical Communications Networks and Devices
by Professor Dr. Alok Kumar Das, Jadavpur University, Kolkata, India

Abstract: To study the characteristics of any network, handling skyrocketing amount of traffic on the internet, it is always required to understand the different types of network as well as the related components and devices for optimization of the network system with better efficiency. To accommodate this skyrocketing amount of traffic, optical network with wavelength division multiplexing (WDM) having several wavelengths per fiber as channels, is the most feasible solution. Transmission rate of a channel is currently 2.4, 10 or 40 Gbps. With the advent of WDM technology, IP (Internet Protocol) backbone carriers are now connecting core routers directly over point-to-point WDM links (IP over WDM). This layer structure with a help of MPLS (Multi Protocol Level Switching) and OXC (Optical Cross Connect) in which IP packets are directly mapped into wavelength channels. The signal without O-E-O (optical to electrical and electrical to optical) conversion reduces the deployment time and thus produces additional network robustness. It has the advantage of eliminating the intermediate layer such as ATM (Asynchronous Transfer Mode) and SONET/SDH (Synchronous Optical Network/ Synchronous Digital Hierarchy). In a larger networks having more number of nodes, more wavelengths are needed and to avoid the large number of wavelengths the wavelength-routed networks overcome these limitations through wavelength reuse, wavelength conversion, and optical switching. Now-a-day there is a need to develop efficient optical components and devices relevant to the different optical networks.

The objective of the tutorial is to provide the attendees first in understanding different basic topologies of the network and to show the better performance of the mesh one to obtain the maximum throughput and bandwidth of the network and also cost effective. The analysis for throughput and bandwidth maximization of some important mesh networks like NSFNET (USA), JGN (Japan) and BSNL (India) will be discussed. The Markov model is used to solve the optimum condition of an efficient network system where the queue of the packets can be kept in a minimum. The different conditions of server idleness and packet queue in a network for different node numbers (N) are considered and the optimum condition depending on the arrival rate Pa and the retransmission rate P will be discussed. We shall discuss the router and routing techniques and different switches and their implementations. Other than the Opto-electronic switching system, the switching can be made directly for routing without converting the optical signal to electrical signal. The different implementation methods of the switches are mechanical, MEMS, Liquid Crystals, Bubble, waveguide type TO (Thermo-optic) and EO (Electro-optic) switches, etc. These optical switches are very efficient and depending on size, capacity, speed, and cost one technology may prove superior to another, at least for specific needs. The advantages and disadvantages of electrical, Opto-electronics and optical switches and in-depth understanding for their requirements considering the limitation of the bandwidth between the links in different network systems will be discussed. The other waveguide type devices like modulators, attenuators, add/drop filters, couplers, power dividers and combiners, etc., required for optical networks, will be discussed considering their low losses and compact sizes. Now-a-day polymeric optical waveguide device! s have attracted great interest in the field of integrated optics as it offers many advantages compared with other available waveguide materials (silicon and LiNbO3) because of their potential for easy, low-temperature and low-cost processing, highly tunable material index with large Thermo-optic coefficient. It also offers EO property with large Electro-optic coefficient simply by mixing the dye in a polymer. It possesses high nonlinear optical property for high speed and wide-band signal processing. Considering this aspects we are preparing both TO and EO polymeric materials starting from the basic chemicals, which will be discussed in the tutorial. Lastly, we shall discuss the networking of 21st century. To fulfill this we are lucky for the invention of low loss optical fiber for the use of communication network and further it continues to drive photonics technology in developing the relevant components and flexible optical networking. Already commercial few Tb/s! (Per fiber) transmission system has been announced and can be expected that in the next several years, we can achieve 50 Tb/s transmission bandwidth.

Biography: Professor Dr. Alok Kumar Das graduated in 1965 from Jadavpur University, Kolkata, India in Electronics and Telecommunication Engineering. He completed his Master and PhD degrees in Engineering from the same University in 1967 and 1972, respectively. He is a senior Professor in the Department. Dr. Das is a senior member of IEEE and is the winner of the prestigious IEEE 2000 Millennium award. His research interest is in the field of Optical fiber communication systems including integrated optics and optical networks. He has directed several sponsored projects in the area of optical fiber components, optical networks, and optical instruments. Dr. Das is directly involved in the development of optical wave-guiding devices like interconnects, modulators, switches, and attenuators. He was Visiting Professor in the City University of Hong Kong almost every year from 1999 to 2004 for the development of optical devices, to be required in optical network applications. Currently he is involved to develop both Thermo-optic and Electro-optic Polymeric materials for the fabrication of optical devices. Dr. Das has given several invited talks in US, Canada, Japan, Germany, China, and others and editor of several journals including IEEE. Dr. Das published about 140 papers in refereed journals and conference proceedings including IEEE, Applied Optics, Optics Lett. Electronics Lett.

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Tutorial 4 T4
Integration of Wireless Local Area Network (WLAN) and Wireless Wide Area Networks (WWAN) for Multimedia Services
by Prof. Vijay K. Garg, Ph.D., P.E.
Distinguished Visiting Professor, Chung-Ang University, Seoul, Korea

Abstract: Both WLAN and 3G WWAN are capable of providing higher-speed wireless connections that cannot be offered by earlier 2G cellular technologies. Therefore, they seem to compete. However each technology has niche market applications. WLANs can cover only small area and allow limited mobility, but provide higher data rates. Therefore, WLANs are well suited to hotspot coverage, where there is high density of demand for high-data-rate wireless services requiring limited mobility. On the other hand, 3G wireless networks, with their well-established voice support, wide coverage, and high mobility, are more suited to area with moderate or low-density demand for wireless usage requiring high mobility. Therefore, WLAN and 3G are complementary. The integration of 3G wireless and WLANs is highly significant to make wireless multimedia and other high-data-rate services a reality for a large population. A multimedia 3G / WLAN terminal can access high-bandwidth data services where WLAN coverage is offered, while accessing wide area networks using 3G at other places. However, this approach alone will only allow limited multi-access functionality. To make multi-access solutions effective, we need an integrated solution to provide seamless mobility between access technologies, allowing continuity of existing sessions. 3G / WLAN integration promises to offer these capabilities seamless.

In standard arena work is going on both in the 3G Partnership Project (3GPP) and 3GPP2 on 3G/WLAN integration. 3GPP has currently specified an inter-working architecture that enables users to access their 2G and 3G data services from WLANs. 3GPP2 has recently initiated to examine the issues of 3G/WLAN inter-working. They are currently finalizing stage 1 specifications of the inter-working system and in the near future will start the architectural activities.

After briefly discussing WLAN and WWAN features, the tutorial focuses on the integration of two systems, discusses issues, and presents different architectures.

Major Topics:
  • Description of Wireless Networks
  • Description of WLAN
  • 3G Network Architecture and Protocols for Packet data
  • Inter-working of WLAN and WWAN: Architectures and Issues

Biography: Dr. Vijay Garg was a distinguished member of technical staff at the Lucent Technologies Bell Labs in Naperville, Illinois from 1985 to 2001. Dr. Garg was also a Professor in the Electrical and Computer Engineering department at the University of Illinois at Chicago from 1999 to 2004, where he taught graduate courses in Wireless Communications & Networking and conducted research. Dr. Garg received his Ph.D., degree from the Illinois Institute of Technologies, Chicago, IL in 1973. He received his MS degree from the University of California at Berkeley, CA in 1966. Dr. Garg has co-authored several technical books including five in wireless communications. He is a fellow of ASCE and ASME, and a senior member of IEEE. Dr. Garg is a registered professional engineer in the state of Maine and Illinois. He is an academic member of the Russian Academy of Transport. Dr. Garg was a feature editor of Wireless/PCS Series in IEEE Communication Magazine from 1996-2001.

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Last updated: 19 Jul 05