3rd International Workshop on Multiple Access Communications
13-14 September 2010, Barcelona, Spain
3rd International Workshop on Multiple Access Communications13-14 September 2010, Barcelona, Spain |
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In recent years classical CDMA methods proposed in the early Nineties have been subjected to intensive research by specialists in wireless communications throughout the world. These researches resulted in the introduction of new CDMA techniques that might be thought of as the basis of further development of wireless multiuser communications. Unfortunately some latest advances in developing CDMA models are known only to a very limited number of specialists in the field. Our talk is aimed at filling this gap in. In our talk a brief overview of the current status of research on CDMA methods will be presented. Several latest advances, namely, the model of restricted asynchronous multiple access in the presence of errors proposed by L. A. Bassalygo, the random OFDMA model proposed by R. Nogueroles, M. Bossert and V. Zyablov and the multiple access model proposed by V. Zyablov and D. Osipov, will be considered in more detail.
Prof. Victor V. Zyablov was born in Kaluga, on July 1, 1937. He received
the Dipl. Eng. degree from the Technical University of Moscow in
1961, Cand. Eng. degree from the Moscow Institute of Communication
in 1968, and Dr. Sc. degree from the Council for Problem of
Cybernetics, USSR Academy of Sciences, in 1979.
From 1961 to 1964 he was an engineer in space industry and from 1964
a postgraduate student at Moscow Institute of Communication. Since
1968 he has been with the Institute for Problems of Information
Transmission USSR Academy of Sciences in Moscow, first as a Junior
Researcher, since 1973 as a Senior Researcher, and since 1981 as a
Head of Laboratory. His main research interests are in
communication system, coding theory and information theory.
List of references of his paper about coding and communication include more then 200 titles,
Four books were written by Zyablov about generalised concatenated
codes (1976,1982,1991) and combination coding and modulation on a
base generalised concatenated scheme (1991) has no analogue in world
literature.
Zyablov is the member of editorial board of the journal Problemy Peredachi Informatsii. He was the member of organizing committees 6 international symposiums on the information theory, more 10 international conferences and more 10 Russian conferences
The new developments in telecommunication technology lead to a substantial increase of the retrial phenomenon which may degrade the performance of the systems specially under overload conditions. This is the main motivation of the current investigations in the field of retrial queues. One more typical feature of the modern communication networks is the bursty correlated nature of the arrival flows. In this talk we discuss the recent analytical and numerical results derived for retrial queues with the correlated arrival flows described by the Batch Markov Arrival Process (BMAP). Difficulties in analysis of such queues are explained the the facts that the underlying Markov processes are multi-dimensional and exhibit the state inhomogeneous behavior. We present the results obtained for the single-server queues with semi-Markovian service process and multi-server queues with phase type (PH) service process with arbitrary dependence of the retrial intensity on the number of customers in the orbit. Effect of correlation in the arrival process is numericallu highlighted. Tandem retrial queues are dealt with as well.
Prof. Alexander N. Dudin was born in Primorskij Region in Russia in 1953.
He got M.S. - from the Belarusian State University, 1976, PhD - from Vilnius State
University (now - Lithuania), 1982, Doctor of Sciences in Physics and Mathematics - from
Tomsk State University (now - Russia), 1992. Currently he is
Full Professor, Head of the Laboratory of Applied Probabilistic Analysis,
Department of Applied Mathematics and Computer Science,
Belarusian State University (www.apa.bsu.by)
He had visits for research and teaching to BEZ-Systems, Chicago, USA,
June-September 1993, Tinbergen Research Institute, Amsterdam,
Holland, December 1995, Science University of Tokyo, Tokyo, Japan,
May-July 1997, Korean Advanced Institute of Science and Technology, Taejon, Korea,
June 1998, Trier University, Germany, March, 2000, July, 2000, January-February 2003,
October 2003, Cochin University of Science and Technology, India, December, 2002,
Glamorgan University, UK, March, 2005 (Award by Royal Engineering Academy and Vodafone
group Foundation); October - November, 2009 (Award by Royal Engineering Academy for
Distinguished Visiting Professors), Chonbuk National University, Korea, September-November
2005, October-November 2006, November-December 2008, INRIA, France, June 2006, October 2007
Fields of scientific interests include: Random processes in Queueing Systems, Controllable
Queueing Systems and their Optimization, Queueing Systems in Random Environment, Retrial
Queueing Systems, Applications of Queueing Theory.
Publications: Two books, more than 250 papers or abstracts, including more than 75 papers
in top level Journals (Journal of Applied Probability, Queueing Systems, Performance
Evaluation, Operations Research Letters, Annals of Operations Research, Computers and
Operations Research, Computer Networks, IEEE Communications Letters, etc).
Scientific secretary of expert council in Mathematics of High State
Scientific Degrees Committee of Republic of Belarus, Vice-Chairman
of Expert Committee of the National Fundamental Research
Foundation in Computer Technologies,
Chairman of the Belarusian Winter Workshops in
Queueing Theory,
Member of IPC of several international conferences and editorial board of four Journals.
In recent years the research community has produced many papers on modeling the 802.11 MAC, and many important advances have been made. All modeling requires assumptions, and in this talk we will look at some of the more common assumptions that have been used for modeling 802.11. While we know the predictions of 802.11 models have been good, it is also interesting to ask "How good are our assumptions?" We'll look at this question using data from testbed and simulation studies.
Dr. David Malone received B.A.(mod), M.Sc. and Ph.D. degrees
in mathematics from Trinity College Dublin in 1996, 1997
and 2000 respectively. During his time as a postgraduate,
he became a member of the FreeBSD development team. After
working in a research and development at Corvil Networks,
in 2001 David moved to the Dublin Institute of Technology
as a senior researcher as part of Prof John Lewis's research
team in communications networks. Since 2004, David has been
at the Hamilton Institute and is currently the Institute's
SFI Stokes Lecturer. His interests include mathematical
models of wireless networking, network measurement and IPv6.
He is the author of O'Reilly's "IPv6 Network Administration".
Dr. Slawomir Pietrzyk is the founder and CEO of Innovative Solutions, a consulting and development company supporting its clients in design and implementation of cutting-edge wireless access systems and specializing in OFDMA/MIMO-based radio interfaces (for more information please visit www.is-wireless.com). He is the author of the first book on OFDMA, entitled OFDMA for Broadband Wireless Access, published in 2006 by Artech House. Slawomir completed his Ph.D. degree in the area of wireless access systems at the Delft University of Technology in the Netherlands in 2005. He holds M.Sc. in telecommunications and postgraduate diplomma in management. Prior to Innovative Solutions, Dr. Pietrzyk worked for PTC (a T-Mobile daughter company) and Ubiquitous Communication Program at the Delft University of Technology. He is a professional instructor delivering technical courses in the area of LTE, WiMAX, OFDM, OFDMA, SC-FDMA and MIMO. Dr. Pietrzyk is the author of several papers on communication technologies and a reviewer for IEEE journals and conferences including Transactions on Communications, Journal on Selected Areas in Communications, ICC, Globecom and VTC.
All questions / proposals should be sent to the MACOM-2010 Workshop Chairs