Plenary Lecture
On Improved Modeling of Survivability-supported Traffic Engineering in Multi-service Networks
Professor Dimitris Karras
Chalkis Institute of Technology
Dept. Automation, Evoia, Greece
E-mail: dakarras@hotmail.com
Abstract: In this plenary lecture, a number of optimisation models and iterate heuristic algorithms that address the survivability-supported Traffic Engineering (TE) problem in multi-service networks for multimedia are presented. In such networks traffic demands with different Quality of Service (QoS) and survivability requirements (e.g. existence of a node disjoint backup path for each primary path) inhere. The optimisation models for engineering the QoS traffic with different survivability prerequisites and the Best-Effort (BE) traffic are based on special admission control/routing Mixed Integer Programming (MIP) and Linear Programming (LP) optimisation sub-problems, which are solved sequentially. LP relaxations of the MIP sub-problems are also provided. The iterative heuristic TE algorithms are based on a modified version of the Dijkstra's algorithm. The above methods are used for the solution of the TE problem in two different networks and their performance is compared. An integrated approach based on the aforementioned work, for prioritised 1:1/1+1 protection and restoration-supported TE in multi-service networks, in the case of single or multiple node/link failure(s), is also presented and tested.
Brief Biography of the Speaker: Dimitrios A. Karras 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 1990 and up to 2004 he has collaborated as visiting professor and researcher with several universities and research institutes in Greece. Since 2004, after his election, he has been with the Chalkis Institute of Technology, Automation Dept., Greece as associate professor in Digital Systems and Signal Processing as well as with the Hellenic Open University, Dept. Informatics as a visiting professor in Communication Systems (since 2002 and up to 2010). He has published more than 50 research refereed journal papers in various areas of pattern recognition, image/signal processing and neural networks as well as in bioinformatics and telecommunications and more than 150 research papers in International refereed scientific Conferences. His research interests span the fields of pattern recognition and neural networks, image and signal processing, image and signal systems, biomedical systems, communications, networking and security. He has served as program committee member in many international conferences, as well as program chair and general chair in several international workshops and conferences in the fields of signal, image and automation systems. He is, also, editor in chief of the International Journal in Signal and Imaging Systems Engineering (IJSISE), topics editor in chief of the International Journal of Digital Content Technology and its Applications (JDCTA) as well as associate editor in various scientific journals. He has been cited in more than 380 research papers, his h-index is 10 and his Erdos number is 5.