Tutorials

Half-day pre-conference tutorials will be given on August 22, 2005.  To register for a tutorial, please use the regular registration form available in the registration section. 
 

ABSTRACT:

The IEEE 802.16/WiMax standard defines the air interface for fixed point-to-multipoint broadband wireless access networks. It is a wireless alternative to digital subscriber line (DSL). An amendment, being drafted, adds mobility support. The promises of 802.16/WiMax are broadband and secure wireless access. The tutorial gives a technical overview of IEEE 802.16/WiMax and a critical assessment of its security model.

BIOGRAPHY:

Michel Barbeau is Professor in the School of Computer Science at Carleton University. He has B.Sc. from Universite de Sherbrooke (1985), an M.Sc. from Universite de Montreal (1987) and a Ph.D. from Universite de Montreal (1991), all in computer science. He has been a visiting researcher at Aizu University, Japan (1998-1999) and Alcatel Canada (2004-2005). He has expertise in software, telecommunication protocols, mobile and wireless networks, satellite telecommunications, object-oriented design and programming, distributed objects and operating systems.

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ABSTRACT:

New 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.

BIOGRAPHY:

Nidal Nasser 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 August 2004. Upon graduation, he has been a member of the Wireless Communications Group of the Telecommunications Research Laboratory at the School of Computing of Queen's University. In January 2005, he joined the Department of Computing and Information Science at University of Guelph, Ontario, Canada, where he is an Assistant Professor. He also held an Adjunct Assistant Professor appointment in the School of Computing at Queen's University since September 2004, where he co-supervises graduate students.

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ABSTRACT:

This tutorial provides an overview of research on future mobile service architecture focusing on adaptive service creation, deployment, provision and management in heterogeneous mobile environments. Services include not only traditional communication ones such as telephony, conferencing, etc. but also multimedia ones such as email, videophone, word processing, web surfing, etc. The user may use a variety of services offered by different operators and also third parties on multiple heterogeneous terminals. The services are also delivered through heterogeneous networks with different capabilities. It is more appropriate to separate the service into two parts, core service and service adaptation. The service adaptation should be carried out dynamically at run time and by the service execution environment. In order to perform service adaptation, the service execution environment must have information about the service QoS requirements, information about the characteristics of the communication link and information about terminal capabilities. It is necessary to have tools to gather and manipulate that dynamic information, especially when the user is roaming between heterogeneous multi-provider networks. It is also crucial to meet the user’s demand of service diversity, service personalisation and context awareness. The tutorial will also provide an overview of current approaches to mobile services such as VHE, MExE, J2ME, J2EE, WAP, IMS, SIP, etc.

BIOGRAPHY:

Do Van Thanh obtained his MSc in Electronic and Computer Sciences from the Norwegian University of Science and Technology in 1984 and his PhD in Informatics from the University of Oslo in 1997. In 1991 he joined Ericsson R&D Department in Oslo after 7 years of R&D at Norsk Data, a minicomputer manufacturer in Oslo. In 2000 he joined Telenor R&D and is now in charge of PANDA (Personal Area Network & Data Applications) research activities with a focus on SIP, XML and next generation mobile applications. He holds also a professor position at the Department of Telematics at the Norwegian University of Science and Technology in Trondheim. He is author of numerous publications and inventor of several patents. http://www.item.ntnu.no/~thanhvan

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