Keynote Speakers
Cognitive Radio Activities at Orange: Challenges and Opportunities
By Dr. Berna Sayrac, Orange Labs
Berna Sayrac
Biography
Sayrac received the B.S., M.S. and Ph.D. degrees from the Department of
Electrical and Electronics Engineering of Middle East Technical University
(METU), Ankara, Turkey, in 1990, 1992 and 1997, respectively. Between 1999
and 2000, she was a postdoctoral fellow at Orange Labs (France Telecom
R&D), Issy Les Moulineaux, France. She worked as an Assistant Professor at
the Department of Electrical & Electronics Engineering of METU between 2000
and 2001, and as a research scientist at Philips Research France between
2001 and 2002. Since 2002, she is working as a research engineer at Orange
Labs. Her research interests include Self Organizing Networks and Cognitive
Radio.
Abstract
Recently, there is a significant increase in the demand for wireless
broadband data, rendering the radio spectrum more and more valuable. It has
been thought to be a scarce resource, but lately, it is being claimed that
a considerable proportion of the radio spectrum is underutilized, paving
the way for new relevant approaches that offer an increased level of
spectral efficiency. On the other hand, the wireless landscape is becoming
more and more complex and heterogeneous. This necessitates a
better-performing and more efficient network, including all the network
entities. Utilization of intelligence/cognition in networks is a potential
solution to reach this aim. Therefore, the concept of cognitive radio has
aroused considerable excitement in the wireless community. Every player has
started to explore what can (or cannot) be done in this area. Orange, as
one of the leading network operators in Europe, is also addressing
cognitive radio issues. This talk will provide an overview of research
activities on cognitive radio conducted within Orange Labs, the R&D branch
of Orange.
Cooperative Sensing and Sharing in Cognitive Radio Networks
By Prof. IAN F.
AKYILDIZ,
Broadband Wireless Networking Lab,
School of Electrical and Computer Engineering,
Georgia Institute of Technology,
Atlanta, GA 30332, USA.
N3Cat (NaNoNetworking Center in Catalunya),
School of Electrical Engineering,
Universitat Politècnica de Catalunya ,
Barcelona , Catalunya, Spain.
Ian F. Akyildiz
Biography
IAN F. AKYILDIZ received his BS, MS, and PhD degrees in Computer Engineering
from the University of Erlangen-Nuernberg, Germany, in 1978, 1981 and 1984,
respectively. Currently, he is the Ken Byers Distinguished Chair Professor
with the School of Electrical and Computer Engineering, Georgia Institute of
Technology, Director of Broadband Wireless Networking Laboratory, Chair of
the Telecommunication Group at Georgia Tech.Dr. Akyildiz is an Honorary
Professor with School of Electrical Engineering at the Universitat
Politecnica de Catalunya, and Director of N3Cat (NaNoNetworking Center in
Catalunya) in Barcelona, Spain, since June 2008. He is also an Honorary
Professor with University of Pretoria, South Africa since March 2009 and a
Visiting Professor with King Saud University in Saudi Arabia since January
2010. He is the Editor-in-Chief of Computer Networks (Elsevier) Journal, the
founding Editor-in-Chief of the Ad Hoc Networks Journal (Elsevier) launched
in 2003, of the Physical Communication (PHYCOM) Journal (Elsevier) launched
in 2008 and of the Nano Communication Networks (NanoComnet) Journal
(Elsevier) in launched 2010. Dr. Akyildiz serves on the advisory boards of
several research centers, journals, conferences and publication companies..
Dr. Akyildiz is an IEEE FELLOW (1996) and an ACM FELLOW (1997). He received
numerous awards from IEEE and ACM. His current research interests are in
Cognitive Radio Networks, Wireless Sensor Networks, Wireless Mesh Networks,
Nanonetworks.
Abstract
Cooperative spectrum sensing and sharing framework is presented as an
effective approach to improve the performance of cognitive radio (CR)
networks over the non-cooperative counterpart. Specifically, cooperative
sensing enhances the licensed user detection probability while cooperative
sharing optimizes spectrum utilization among cognitive radio users. However,
several essential factors, such as spatially correlated shadowing, the
increase of control traffic under bandwidth constraints, and the incurred
delay, contribute to cooperation overhead and pose several significant
research challenges. In this talk, existing cooperative spectrum sensing
and spectrum sharing solutions are presented and future research challenges
are highlighted.
Adaptive Transmission for Underlay Cognitive Radio Networks
By Prof. Mohamed-Slim Alouini, Electrical Engineering, Division of Physical Sciences and Engineering, KAUST, Saudi Arabia.
Mohamed-Slim Alouini
Biography
Dr. Mohamed-Slim Alouini started his academic career at the department of
Electrical and Computer Engineering of the University of Minnesota, in the
United States in 1998. In 2005, he joined the Electrical and Computer
Engineering program at Texas A&M University at Qatar, where his research
interests included statistical characterization and modeling of fading channels,
performance analysis of diversity combining techniques, MIMO (multiple
input-multiple output), and multi-hop/cooperative communications systems,
cognitive radio systems, and design and performance evaluation of multi
resolution, hierarchical, and adaptive modulation schemes. In June 2009, Dr.
Alouini has been appointed Professor of Electrical Engineering in the Division
of Physical Sciences and Engineering at KAUST, Saudi Arabia. He has been since
then responsible for research and teaching in communication theory and applied
probability.
Dr. Alouini has published several papers on the above subjects, and he is co-author
of the textbook Digital Communication over Fading Channels published by Wiley
Interscience. He is a Fellow of the Institute of Electrical and Electronics
Engineers (IEEE). He is co-recipient of the beat paper awards in IEEE Vehicular
Technology Conference (VTC'99-Fall), Amsterdam, The Netherlands, The 7th ACM/IEEE
International Symposium on Modeling, Analysis and Simulation of Wireless and
Mobile Systems (MSWiM 2004), Venice, Italy; The IEEE Global Communications
(Globecom'07) Wireless Communication Symposium, 2007, Washington D.C., USA; The
IEEE International Conference on Signal Processing and Communications (ICSPC
2007), Dubai, United Arab Emirates; The 20th IEEE Personal, Indoor, and Mobile
Radio Communication Conference (PIMRC'2009), Tokyo, Japan, and The 2009
International Conference on Wireless Communications and Signal Processing (WCSP
2009), Nanjing, China. He is listed in Thomson ISI Web of Knowledge list of
Highly Cited Researchers (ISIHighlyCited.com)
Abstract
Cognitive radio (CR) has received
recently a great deal of attention in the literature as a way to improve
the overall spectrum efficiency by exploiting the unused spectrum in a
dynamic environment where radio spectrum use is changed over time,
frequency and space. The CR design is a new radio design and it involves
smartly sensing the swaths of spectrum and then determining the
transmission characteristics (e.g., rate, power, and bandwidth) of
secondary users based on the primary users' behavior and/or conditions.
CR networks can be divided into three different types; Overlay, underlay
and, interweave. For the interweave type, the secondary users are only
allowed to use the spectrum of the primary network whenever it is idle,
which requires continuous sensing of the primary spectrum by the secondary
network. For the underlay network, simultaneous transmissions are allowed
by letting the secondary network share the spectrum with the primary
network under the condition of maximum interference power level at the
primary receiver. Finally, for the overlay type, the secondary network is
aware of the signal characteristics of the primary network which is
exploited to achieve an enhanced performance for the secondary network by
minimizing the interference resulted from the primary transmissions.
In this talk, we will focus on the underlay set-up and will explore
possibilities of the usage of adaptive transmission in conjunction with CR
networks in order to maximize the spectral efficiency of the secondary
users. Several combinations of continuous and discrete adaptations of the
rate as well as the power will be presented. The resulting spectral
efficiency performance as well as the underlying channel state information
and
feedback requirements for each combination will also be discussed. The talk
will conclude with some on-going and future efforts involving related
issues dealing with the scheduling and pairing of primary and secondary
users.
Cognitive Radio
technology: First decade and the way ahead
By: Prof. Joseph. Mitola, Stevens Institute of Technology, USA
Joseph Mitola
Biography
Dr. Joseph Mitola III (Fellow of the
IEEE) is Distinguished Professor in the School of Systems and Enterprises
at Stevens Institute of Technology where his research interests include
trustable cognitive systems. Previously, Dr. Mitola was the Chief
Scientist of the DoD Federally Funded Research and Development Center of
The MITRE Corporation, special assistant to the Director of the Defense
Advanced Research Projects Agency (DARPA), DARPA program manager; and
special advisor to the Executive Office of the President of the United
States; and Technical Director of Modeling and Simulation for DoD. He has
also held positions of technical leadership with E-Systems, Harris
Corporation, Advanced Decision Systems, and ITT Corporation. He began his
career as an engineering student assistant with the US Department of
Defense in 1967.
Dr. Mitola has been awarded the BS in EE (Northeastern University, Boston,
1971); MSE (The Johns Hopkins University, Baltimore, 1974); Licentiate and
Doctorate in Teleinformatics (KTH, The Royal Institute of Technology,
Stockholm, June 2000)
