Prof. Paulo Marques

Prof. Pascal Lorenz

Tutorial I

Tutorial II

Cognitive radios in TV white spaces:
a great opportunity for mobile multimedia communications
IP-Oriented QoS in the Next
Generation Networks: application to
wireless networks


Prof. Paulo Marques
Cognitive radios in TV white spaces: a great opportunity for mobile multimedia communications



The complete transition from analogue to the digital TV is planned in Europe for 2012. After analogue switch off the spectrum 790 MHz to 862 MHz (TV channels 61 to 69), the so called digital dividend, will be/was entirely cleared from broadcast. Within the remaining spectrum (470 MHz to 790 MHz) not all channels are occupied at each location. These locally unused channels are called TV White Spaces (TVWS). TVWS provides a “once in a lifetime” opportunity for the development of innovative multimedia services and the introduction of new cognitive radio technologies into the UHF bands. However, despite the grand words about opening up a new band to support low cost, ubiquitous access and innovative new providers, there are many obstacles to TVWS systems. The creation of workable systems that clearly demonstrates and prove that no harmful interference is caused to broadcasters (DVB) or other licensed systems is one of those challenges, as is the completion of standards. In this context, the tutorial will address the following topics:

1-Global perspective of the digital switchover
2-The economic potential and impact on multimedia services
3-Main technical challenges and possible approaches
4-The regulatory framework for the use of cognitive TVWS systems in Europe
5-Ongoing standardization efforts on the cognitive use of TVWS


Paulo Marques received his PhD from the University of Aveiro (Portugal) in 2006, respectively. He is senior researcher at the Instituto de Telecomunicações (Aveiro) and Professor in the Polytechnic Institute of Castelo Branco. During 2006 he was a visiting researcher at Trinity College of Dublin working on reconfigurable radio systems..He has been involved in several European research projects, namely the IST projects, SAMBA, ASILUM, MATRICE, 4MORE and ORACLE where he acts as workpackage leader on “sensing and interference evaluation”. He is currently the project coordinator of the new FP7 project ICT-COGEU (Cognitive radio systems for an efficient sharing of TV white spaces in European context). He is a member of IEEE P1900.6 standardization group.

Prof. Pascal Lorenz
IP-Oriented QoS in the Next Generation Networks: application to wireless networks


Emerging Internet Quality of Service (QoS) mechanisms are expected to enable wide spread use of real time services such as VoIP and videoconferencing. The "best effort" Internet delivery cannot be used for the new multimedia applications. New technologies and new standards are necessary to offer Quality of Service (QoS) for these multimedia applications. Therefore new communication architectures integrate mechanisms allowing guaranteed QoS services as well as high rate communications.
The service level agreement with a mobile Internet user is hard to satisfy, since there may not be enough resources available in some parts of the network the mobile user is moving into. The emerging Internet QoS architectures, differentiated services and integrated services, do not consider user mobility. QoS mechanisms enforce a differentiated sharing of bandwidth among services and users. Thus, there must be mechanisms available to identify traffic flows with different QoS parameters, and to make it possible to charge the users based on requested quality. The integration of fixed and mobile 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 the demand for mobile Internet services has grown rapidly and predicted to generate billions of dollars in revenue.
This tutorial covers to the issues of QoS provisioning in heterogeneous networks and Internet access over future wireless networks as well as ATM, MPLS, DiffServ, IntServ frameworks. It discusses the characteristics of the Internet, mobility and QoS provisioning in wireless and mobile IP networks. This tutorial also covers routing, security, baseline architecture of the inter-networking protocols and end to end traffic management issues.

Pascal Lorenz (lorenz@ieee.org) received his M.Sc. (1990) and Ph.D. (1994) from the University of Nancy, France. Between 1990 and 1995 he was a research engineer at WorldFIP Europe and at Alcatel-Alsthom. He is a professor at the University of Haute-Alsace, France, since 1995. His research interests include QoS, wireless networks and high-speed networks .He is the author/co-author of 3 books, 2 patents and 200 international publications in refereed journals and conferences.
He was Technical Editor of the IEEE Communications Magazine Editorial Board (2000-2006), Chair of Vertical Issues in Communication Systems Technical Committee Cluster (2008-2009), Chair of the Communications Systems Integration and Modeling Technical Committee (2003-2009) and Chair of the Communications Software Technical Committee (2008-2010). He has been Co-Program Chair of ICC'04 and symposium Co-Chair at Globecom 2009-2007 and ICC 2009-2008. He has served as Co-Guest Editor for special issues of IEEE Communications Magazine, Networks Magazine, Wireless Communications Magazine, Telecommunications Systems and LNCS.
He is senior member of the IEEE and member of many international program committees. He has organized many conferences, chaired several technical sessions and gave tutorials at major international conferences.