COMNET Research Unit Dept. of Electrical and Computer Engineering Democritus University of Thrace, Greece

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COMNET Research Unit Dept. of Electrical and Computer Engineering Democritus University of Thrace, Greece

Members FACULTY: –V. Tsaoussidis (networks), –P. Efraimidis (algorithms) Members: Ph.D students: –L. Mamatas, Energy Saving Protocols –I. Psaras, Congestion Control, SCTP –P. Papadimitriou, Real-time traffic over heterogeneous nets –A. Tsioliaridou, Non-congestive queuing, scheduling –A. Arsakian, Budget-oriented packet services (BOPS) –C. Samaras, QoS –S. Dimitriou, –G. Papastergiou »Recent Ph.D graduates: –Chi Zhang, FIU, USA – A. Lahanas, UCY

Projects Designing Responsive Protocols for Grids –Budget 67KEuro, Greek Research Foundation, until 2007 Energy-saving Transport Protocols for Heterogeneous Wired/Wireless Networks –Budget: 146 KEuro, Greek Research Foundation, until 2008 Extending Internet into Space –European Space Agency, Budget ~1MEuro until 2010

Activities –WWIC, Wired/Wireless Internet Communications –Journal of Internet Engineering, Klidarithmos Press ( –Boards IEEE Transactions on Mobile Computing, by IEEEIEEE Transactions on Mobile Computing Computer Networks, by ElsevierComputer Networks The Journal of Wireless Communications and Mobile Computing, by WileyThe Journal of Wireless Communications and Mobile Computing The journal of Mobile Multimedia, Rinton PressThe journal of Mobile Multimedia International Journal of Parallel, Emergent and Distributed Systems, Taylor & FrancisInternational Journal of Parallel, Emergent and Distributed Systems

Sample Recent Publications 1.I. Psaras, V. Tsaoussidis "Why TCP Timers (still) Don't Work Well" Computer Networks Journal (COMNET), Elsevier Science, L. Mamatas and V. Tsaoussidis, Exploiting Energy-saving Potential in Heterogeneous Networks, International Journal of Parallel, Emergent and Distributed Systems (IJPEDS), Taylor and Francis, C. Zhang and V. Tsaoussidis, TCP Smoothness and Window Adjustment Strategy The IEEE Transactions on Multimedia, V. Tsaoussidis and C. Zhang, "The dynamics of responsiveness and smoothness in heterogeneous networks IEEE Journal on Selected Areas in Communications, (JSAC), vol. 23, no. 6, pp , June 2005

Topics of Interest Transport over wired/wireless Energy aspects (transmission/queuing) Internetworking with sensors Algorithmic aspects of ad hoc networks

Transport over wired/wireless Already a classic research topic Still calls for improvements in areas such as –Congestion control and transmission policies –Protocol headers –Energy performance

Energy aspects Energy potential and energy expenditure Risk Index – System Efficiency Cross-layer optimization Queuing/Scheduling/Dropping Policies for energy efficiency of mobile applications

Internetworking with sensors Global Internetworking –Reliable Sensor Protocols Less Impact – Better Service –Non Congestive Queuing Algorithmic Aspects of Sensor Networks