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General Info
Name Karetsos Georgios
Category Professors
Phone +302410684526
e-mail karetsos@teilar.gr
Web site https://teilar.academia.edu/GeorgeKaretsos
Contact hours
:: Τετάρτη/Wednesday12:00-13:00Γραφείο 6 Νέων Κτιρίων/Office No 6
:: Παρασκευή/Friday11:00-12:00Γραφείο 6 Νέων Κτιρίων/Office No 6
Short CV
1. STUDIES: May 1996 : Dr.-Ing. degree, National Technical University of Athens (NTUA), School of Electrical and Computer Engineering,. February 1992 : Diploma in Electrical Engineering, National Technical University of Athens (NTUA), School of Electrical Engineering. 2. SCIENTIFIC INTERESTS: Computer networks and QoS assurance techniques, distributed processing and resource management. Dr. Karetsos has over 60 publications in journals/books and in conference proceedings. 3. PARTICIPATION IN SCIENTIFIC COMMITTEES: He has participated in the Technical Program Committees of the following international conferences and workshops: EDOC (Enterprise Distributed Object Computing) 1998 and 1999, IWAN (International Workshop on Active Networks) 2001, Mobile Venue 2002 και 2004, European Wireless 2005, IST Summit 2005 and 2006, IEEE PIMRC 2005 and as Technical Program Committee co-chair of European Wireless 2006. He has also acted as reviewer in numerous journals and conferences related to computer communications and wireless networking. 4. PROFESSIONAL AND RESEARCH EXPERIENCE: He has participated in a number of international and national research projects related to computer communications and wireless networking while he was with the division of Computer Science in the school of Electrical and Computer Engineering of the National Technical University of Athens like RACE-STRATOSPHERIC, ACTS-ABS, ACTS-ΑBROSE, IST-FAIN, IST-ANDROID, IST-MANTRIP and IST-HARP. After he has joined TEI of Larissa he was involved in the following projects: Information Technology Curriculum Enhancement in the Computer Science and Telecommunications department of TEI Larissa supported by the Greek ministry of National Education and Religious Affairs. Scientific coordinator for TRC-Thessaly of project “DIOSKOUROI”, a human network of technological and research training supported by the General Secretariat for Research and Technology. Scientific coordinator of the project “Resource Management Techniques for Achieving Quality and Reliability in Mobile Telecommunication Networks” supported by the Greek ministry of National Education and Religious Affairs in the framework of the “ARCHIMEDES” initiative.


He has participated in numerous European and Greek research projects dealing with the design, implementation and validation of communication networks. He has been mainly involved in the following projects: RACE 1014 (ATMOSPHERIC), RACE 2016 (STRATOSPHERIC), ESPRIT 5193 (MAXI, Metropolitan Area Communication System), ESPRIT 7314 (MANTIS, Metropolitan Area Network for Integrated Services). From 1996 to 1999 he has been working in the area of Service Creation over Open Distributed Platforms. In this area he has participated the ACTS projects ABS (AC206) and in the ACTS project ABROSE (AC316). In the framework of the IST Programme of the European Community he has been involved in the IST projects ANDROID, FAIN, CAUTION and CAUTION++. He was the scientific co-ordinator of several Greek research projects. His research interests include: active networks, nomadic computing, performance evaluation and traffic engineering, resource management for fixed and wireless networks. Dr. Karetsos is a member of the Technical Chamber of Greece, and of the Greek Association of Mechanical and Electrical Engineers.


 He has served as a reviewer and member of the Technical Committee for various conferences and journals within his scientific interests. Overall he has participated in the organizational aspects of the following international conferences:

  1. EDOC (Enterprise Distributed Object Computing) 1998, San Diego, California, USA 
  2. IS&N (Intelligence in Services and Networks), Antwerp, Belgium 1998
  3. EDOC (Enterprise Distributed Object Computing) 1999, Mannheim, Germany
  4. DSOM (Distributed Systems: Operations & Management), Austin, Texas, 2000
  5. COMCON 8 (8th International Conference on Advances in Communications and Control), Crete, Greece 2001
  6. IST Mobile & Wireless Communications Summit, Barcelona, Spain, 2001
  7. IWAN (International Workshop on Active Networks) 2001, Philadelphia, Pennsylvania, USA
  8. Radio Network Management & Mobile Location Workshops 2002, Athens, Greece
  9. IST Mobile & Wireless Communications Summit, Thessaloniki, Greece, 2002
  10. Radio Network Management & Mobile Location Workshops 2004, Athens, Greece
  11. IST Mobile & Wireless Communications Summit, Aveiro, Portugal, 2003
  12. IST Mobile & Wireless Communications Summit, Lyon, France, 2004
  13. European Wireless 2005, Nicosia, Cyprus
  14. IST Mobile & Wireless Communications Summit 2005, Dresden, Germany
  15. IEEE PIMRC 2005, Berlin Germany
  16. First Wireless Euro-Mediterranean International Conference (WEMIC 2006), Amman, Jordan
  17. European Wireless 2006, Athens, Greece
  18. CCDN 2006 (Content Caching and Distribution Networks), in conjunction with Networking 2006 IFIP Conference
  19. IST Mobile & Wireless Communications Summit 2006, Myconos, Greece, 4-8 June 2006
  20. TEMU 2006, International Conference on Telecommunications and Multimedia, Crete, Greece
  21. IEEE PIMRC 2006, Helsinki, Finland
  22. Mobile Computing and Wireless Communications International Conference (MCWC 2006),
  23. The Fifth IASTED International Conference on COMMUNICATION SYSTEMS  AND NETWORKS (CSN 2006) August 28-30, 2006, Palma de Mallorca, Spain
  24. IST Mobile & Wireless Communications Summit 2007, Budapest, Hungary, 1-5, July 2007
  25. IEEE PIMRC 2007, Athens, Greece, 3-6, September 2007
  26. 4th Mobility Conference, International Conference on Mobile Technology, Applications and Systems 12-14 September 2007, Singapore
  27. IEEE International Symposium on Wireless Communication Systems 2007, 17-19 October 2007, Trondheim, Norway
  28. MM-CNIT 2007, Multi-Conference on Communications, Networking and Information Technology, 6-8 December 2007, Amman, Jordan
  29. MediaWiN 2008, Third Workshop on multiMedia Applications over Wireless Networks, July 6th, 2008, Marrakech, Morocco
  30. TEMU 2008, International Conference on Telecommunications and Multimedia, 16-18 July 2008, Ierapetra, Crete, Greece
  31. 5th Mobility Conference, International Conference on Mobile Technology, Applications and Systems, Yilan, Taiwan, September 10-12, 2008.
  32. IEEE PIMRC 2008, 19th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, September 15-18, Cannes, France
  33. 3rd IEEE International Workshop on Modeling Autonomic Communication Environments (MACE 2008) September 25-26, 2008, Samos Island, Greece
  34. WCNC 2009, IEEE Wireless Communications & Networking Conference, 5-8 April 2009, Budapest, Hungary
  35. IST Mobilight, 1st International Conference on Mobile Lightweight Wireless Systems, Athens, Greece, May 18-20, 2009
  36. MediaWiN 2009, Fourth Workshop on multiMedia Applications over Wireless Networks, 5 July 2009 - Sousse, Tunisia
  1. IEEE PIMRC 2009, 20th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, September 13-16, Tokyo, Japan
  2. EW2011, 17th European Wireless Conference, April 27-29, 2011, Vienna, Austria
  3. IEEE VTC 2011 Spring, 73rd Vehicular Technology Conference, May 15-18 2011, Budapest, Hungary
  4. ΙΕΕΕ ICT 2011, 18th International Conference on Telecommunications, May 8-11, 2011, Ayia Napa, Cyprus
  5. IEEE ISCC 2011, The 16th IEEE symposium on Computers and Communications, June 28 - July 1, 2011, Corfu, Greece
:: 4G Mobile and Wireless Communications Technologies (18/08/2008)
Mobile and wireless communications are moving towards a new era that will be characterized by the seamless collaboration of heterogeneous systems, the need for high speed communications while on the move and for advanced services with quality guarantees. Recent market research studies show that most of the traffic in the future wireless networks will be produced by mobile multimedia services which are expected to proliferate by the year 2010. On the other hand mobile and wireless communications technology is becoming more and more important in developing countries where people demand fast deployment and low cost for broadband wireless internet services. The objective of this volume is to gather research and development on topics shaping the fourth generation (4G) in mobile and wireless communications and reveal the key trends and enabling technologies for 4G.
:: Admission control for QoS support in heterogeneous 4G wireless networks (01/05/2008)
Admission control plays a very important role in wireless systems, as it is one of the basic mechanisms for ensuring the quality of service offered to users. Based on the available network resources, it estimates the impact of adding or dropping a new session request. In both 2G and 3G systems, admission control refers to a single network. As we are moving towards heterogeneous wireless networks referred to as systems beyond 3G or 4G, admission control will need to deal with many heterogeneous networks and admit new sessions to a network that is most appropriate to supply the requested QoS. In this article we present the fundamentals of access-network-based admission control, an overview of the existing admission control algorithms for 2G and 3G networks, and finally give the design of a new admission control algorithm suitable for future 4G networks and specifically influenced by the objectives of the European WINNER project.
:: Towards the Wireless 2010 Vision: A Technology Roadmap (01/08/2007)
This paper describes an envisioned technology roadmap for the development of mobile and wireless communications until the year 2010. The roadmap description is based on a 3-years study (2001–2004) and monitoring of the technological developments of characteristically chosen mobile and wireless communication areas. The final definition of the technology roadmap was based on selected areas of high value that the authors consider as the corner aspects of the evolution of mobile communications. Two main groups of areas were defined and analyzed from a technological and from a service perspective. From technological perspective the areas of high research interest include radio technologies with effect on spectrum use, access and radio interface technologies, and technologies related to mobile terminals. From service perspective, we considered interactive broadcasting, location technologies and location based services (LBS) and personalization of services. The paper identifies the open issues to be solved to realize the future of wireless communications and describes the enabling technologies for next generation communications. It identifies the technology and non-technology barriers to development, deployment, as well as guidelines for the use of technology. Finally, a visionary scenario is described to illustrate the necessary evolution of the value chain for the successful deployment of any new service or technology.
:: A Hierarchical Radio Resource Management Framework for Integrating WLANs in Cellular Networking Environments (01/12/2005)
Over the last few years wireless local area networking (WLAN) has become a very important technology that offers high-speed communication services to mobile users in indoor environments. WLAN technology offers some very attractive characteristics such as high data rates, increased QoS capabilities and low installation costs that made many professionals claim that it will be the main opponent of IMT-2000, despite the enormous effort spent for the specification and implementation of 3G systems. However, WLAN present also many important constraints mainly related to their restricted coverage capabilities. On the other hand 3G systems are deployed gradually and carefully since their business prospects are not yet validated and is expected that 2G and 2G+ cellular systems will continue to play an important role for at least five more years. Thus our today’s wireless networking environment is in fact a conglomeration of all these technologies for which there is a strong need for cooperation. In this paper we describe a heterogeneous wireless networking environment, together with its features and user requirements. We explain the importance of the WLAN existence and we describe a framework and a system architecture that supports seamless integration of WLAN in heterogeneous cellular networking environments focusing on supporting efficient resource provision and management.
:: Practical Radio Resource Management in Wireless Systems (01/04/2004)
Despite frustrating customers and loss of revenue for telecommunications providers, cellular network congestion has remained a problem for which few solutions have been found. Covering GSM, GPRS, UMTS and beyond 3G systems, this practical book breaks new ground by providing you with proven techniques for decreasing blocking and dropped call rate due to network congestion. Using real measurements, this book clearly shows you that the maximum traffic that can be accommodated in a wireless network is not a constant value and varies significantly.
Principles of wireless communication systems, noise and its modeling, transmission lines, basic antenna theory, cellular mobile communications systems, propagation Models for mobile communications, mobile wireless channel characterization and modeling, the cellular concept, frequency assignment, frequency reuse and interference, mobility management, architecture of mobile communications systems (GSM, UMTS).
{WINTER SEMESTER COURSE} Lectures: Wednesday 09:00-12:00, Exercises: Friday 09:00-11:00.
This course explores elements of the theory and practice of digital communications. In particular we will focus on the following: Classification of signals and systems, Orthogonal functions, Fourier series, Fourier transform, Spectra and filtering, Sampling theory, Nyquist theorem, Random processes, autocorrelation, power spectrum, Pulse code Modulation (PCM) and variations, Signals and noise, ISI in bandlimited channels Zero-ISI condition: the Nyquist criterion, Raised cosine filters, Eb/No, demodulation and detection, Correlation receiver and matched filter, Detection of binary signals in AWGN, Optimal detection for general modulations, Bandpass PAM, coherent and noncoherent detection, MPSK and MFSK, coherent and noncoherent detection, QAM modulations, Calculation of error probability.
{SPRING SEMESTER COURSE} Lectures: Tuesday 09:00-11:00 Laboratory:  Tuesday 11:00-13:00, Tuesday 13:00-15:00.
:: Multimedia Comminications
The course deals with the creation and transmission of multimedia content. In particular the following are studied: Components of multimedia and their visualization. Data compression basics. Encoding of audio, image and video. Standards for multimedia data representation. Techniques for evaluating quality of service and quality of experience in multimedia data transmission. Architectures and protocols for quality assured services on the Internet. Multicast and broadcast protocols. Routing algorithms with guaranteed quality of service. Architectures for providing multimedia services on mobile networks.
{WINTER SEMESTER COURSE} Lectures: Tuesday 09:00-11:00, Exercises: Tuesday 11:00-13:00.
:: Special Topics In Networks
The course deals with advanced networking aspects. In particular special architectures, techniques and mechanisms are presented that enable demanding services both in wired and wireless networks. The subjects that we deal with concern the following: Overlay networks, unstructured and peer-to-peer networks, collaborative communications. Flow control and congestion issues for service delivery with time constraints in wireless networks. Interworking of heterogeneous networks and mobility management. Content delivery networks and load balancing techniques. Active networks and Web coding. Near field communications and machine to machine communication protocols.
{SPRING SEMESTER COURSE} Lectures: Friday 09:00-11:00, Exercises: Friday 11:00-13:00.

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Computer Science and Engineering
Faculty of Technological Applications
T.E.I. of Thessaly
Ring Road Larissas-Trikalon
Larissa, Greece
Tel: +30 (2410) 684312    FAX: +30 (2410) 684-573
GPS 39.628860, 22.382690
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