Sunday April 17, 2005
09:00 - 12:30 Tutorial Session 1
Marie-Mélisande Tromparent, Munich University of Technology (TUM), Germany
Abstract: Since a few years, Quality of Service (QoS) has become an extremely popular topic in the industry and in the research community. Because of the proliferation of all kinds of contributions on this topic, the lack of unified definition and the broad application range of Quality of Service, it is very difficult to get an overview of this research field. This tutorial aims at bringing some clarity in this complex area and is divided into 3 main parts: QoS in wired IP-networks, QoS in wireless IP-networks (main focus: IEEE 802.11 WLAN) and end-to-end QoS. Although the first part of the talk deals with QoS in wired networks, many general concepts will be introduced, that also apply to wireless networks. The first part of this tutorial is composed of following points:
The second part of this tutorial deals more particularly with the problematic of wireless IP-networks. The QoS guarantees which may be achieved in such networks significantly differs from the ones in fixed networks because of the properties of the wireless medium. However, in order to provide end-to-end quality of service, the wireless part of a network must be taken into account. As previously standard (especially 802.11e) and research works will be presented and classified. The last part of the talk addresses the problem of end-to-end QoS over IP-networks composed of a wired and a wireless part. It combines results from the two first parts in order to determine the achievable end-to-end quality of service levels
Biography: Marie-Mélisande Tromparent received the M.S. degree in 2001 from the « École Nationale Supérieure des Télécommunications de Bretagne » and from the Munich University of Technology. She had the opportunity during her studies to gather some industry experience (in particular 18 months at Matra Nortel Communications) as well as many abroad experience. She joined the Institute of Communication Networks of the Munich University of Technology in November 2001, where she currently holds the position of research and teaching assistant working toward the Ph.D degree in electrical engineering (expected in june 2005). Her dissertation research focuses on quality of service in wired and wireless IP-networks and network management.
Lunch on our own
14:00 - 17:30 Tutorial Session 2
Joel J. P. C. Rodrigues and Mário M. Freire University of Beira Interior, Portugal
Abstract: In this half-day tutorial, we will review network architectures for next generation optical Internet networks with special focus on the optical burst switching (OBS) paradigm. Due to the exponential increase of Internet traffic, IP (Internet Protocol) has become the convergence protocol for multi-service networks. On the other hand, WDM (Wavelength Division Multiplexing) point-to-point links are already in use by a multi-layer architecture to transport IP traffic. Although this approach increases the link bandwidth by using WDM, it does not solve the problem of network bottleneck due to the exponential traffic growth, since this solution only shifts the bottleneck problem from the link to the electronic router. A solution to this problem that also leads to lower management costs and lower complexity consists in the use of a two-layer architecture, in which IP traffic is transported directly over optical networks. This tutorial will focus the integration of IP protocol with the optical layer, in order to build the so-called optical Internet. Approaches proposed for the optical Internet, namely the Generalized MultiProtocol Label Switching framework conducted by IETF (Internet Engineering Task Force) and the OBS paradigm will be discussed. After presenting the most important optical switching paradigms, we will concentrate on OBS networks. Concerning OBS networks, we will consider network architectures, burst assembly process, classes reservation, signalling protocols, and contention resolution. The recent technological developments and future trends are also discussed.
Biography: Joel Rodrigues is graduated in Informatics Engineering in 1995 at University of Coimbra, Portugal, and received his MSc degree at University of Beira Interior, Portugal, in 2002. Between 1995 and 2000 he worked in the industry and services, namely on Portugal Telecom and Portugal Telecom Research Center. He is currently an Assistant at the Department of Informatics of University of Beira Interior, Portugal, and a Researcher of Institute of Telecommunications, Portugal. His research interests include optical Internet, optical burst switched networks, and knowledge networks. He is member of the Network of Excellence EuroNGI (Design and Engineering of the Next Generation Internet). He has reviewed papers for several international journals, encyclopedias, and conferences (IEEE Globecom, ICC, Infocom, WCNC, HSNMC, ICN, ECUMN) and he has authored or co-authored over 30 papers in refereed international journals and conferences, and given tutorials in several international conferences. He is or was a member of the Technical Program Committee (IEEE Globecom-WC Symposium, ICN, IWT, AIWCT) and Organizing Committee (IEEE HSNMC, ECUMN, A-ICT, SAPIR) of several international conferences, and chaired many technical sessions at international conferences. He is a licensed Professional Engineer and he is a member of IEEE Computer Society and IEEE Communications Society, Internet Society, and a member of the ACM SIGCOMM. Mário Freire is an Assistant Professor of Computer Networks at the Department of Informatics of the University of Beira Interior, Covilhã, Portugal, where he is the Vice-head of the Department and the Director of the MSc course in Informatics Engineering. He is also the leader of the Networks and Multimedia Group of the Institute of Telecommunications - Covilhã Lab. His main research interests include: Optical Internet, high speed networks, and network security. He has been the editor of 1 book and has authored or co-authored over 60 papers in international refereed journals and conferences. He is or was a member of Technical Program Committee of several IEEE and IASTED conferences. He was the General Chair of HSNMC'2003 and is a co-chair of ECUMN'2004 conferences. He is a licensed Professional Engineer and he is a member of IEEE Computer Society and IEEE Communications Society, a member of the ACM SIGCOMM, and a member of the Internet Society.
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