Abstract: Bandwidth management is one of the fundamental issues in wireless communications. The corresponding allocation schemes can not be static due to the dynamically changing traffic conditions and network performance. Thus, more sophisticated strategies adapted to current network conditions must be investigated and applied. Recently, various approaches have been proposed for channel allocation based on intelligent techniques such as multi-agent technology and genetic algorithms. These approaches constitute heuristic solutions to resource management problem. The goal of this plenary speech is two fold. First, is to present global optimization strategies for bandwidth management, based on computational intelligence techniques. Second, is to illustrate the development and application of a novel global optimization scheme, based on the ant colony optimization approach. Such an approach has not been proposed so far for solving the channel allocation problem in wireless communication systems. A comprehensive heuristic methodology based on global optimization and intelligent techniques like ant colony optimization and multi-agents is herein proposed. Simulation results show network performance improvement of the proposed global optimization strategy based on computational intelligence.


Brief Biography of the Speaker:
Dimitrios A. Karras, PhD received his Diploma and M.Sc. Degree in Electrical and Electronic Engineering from the National Technical University of Athens, Greece in 1985 and the Ph. Degree in Electrical Engineering, from the National Technical University of Athens, Greece in 1995, with honours.
From 1989-1995 he was with the National Centre of Scientific Research as a collaborating researcher. From 1995-2000 he served as a visiting professor in the University of Ioannina, Dept. Informatics and in the University of Piraeus, Dept. Business Administration. From 2000-2003 he was with the Hellenic Aerospace Industry as technical Manager in Telecommunications projects as well as with the Hellenic Open University, Dept. Informatics as a visiting professor. In addition he was collaborating with the University of Hertfordshire as an external professor. Since 2004, he has been with the Chalkis Institute of Technology, Automation Dept., Greece as full professor in Digital Systems as well as with the Hellenic Open University, Dept. Informatics as a visiting professor. He has published more than 40 research Journal papers in various areas of pattern recognition, image/signal processing and neural networks and more than 120 research papers in International Scientific Conferences. His research interests span the fields of pattern recognition, neural networks and computational/ artificial intelligence, multidimensional digital signal processing, image processing and analysis, communications and security, biomedical engineering as well as parallel and fast algorithms.
Dr. Karras is Editor in Chief of the journal “International Journal of Signal and Imaging Systems Engineering (IJSISE)”, InderScience Publishers, http://www.inderscience.com/browse/ index.php?journalCODE=ijsise
He has served as General Chair in the Conference on Artificial Intelligence and Pattern Recognition, AIPR-07, Orlando, Florida, USA, July 9-12, 2007, in the International Conference on Software Engineering Theory and Practice, SETP-07, Orlando, Florida, USA, July 9-12 2007 as well as in the International conference on Automation, Robotics and Control Systems, ARCS-08, Orlando, Florida, USA, July 7-10 2008. He was Programme Chair in the international conference IWSSIP 2005, September 2005, Chalkis, Greece.
Dr. Karras research efforts have been supported by a research grant in DKFZ- Germany in 1995, he is listed in a number of International Who's Who, he has served as session chair/ international program committee member in many International Scientific Conferences and as a referee in many research journals/conferences. Dr. Karras is a member of IEEE, a member of ACM as well as a member of the Technical Chamber of Greece.