COMNET Research Unit

Dept. of Electrical and Computer Engineering

Democritus University of Thrace, Greecehttp://comnet.ee.duth.gr/comnet/

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

(www.jie-online.org)– Boards

• IEEE Transactions on Mobile Computing, by IEEE • Computer Networks , by Elsevier • The Journal of Wireless Communications and Mobile

Computing , by Wiley • The journal of Mobile Multimedia, Rinton Press• International Journal of Parallel, Emergent and Distributed

Systems, Taylor & Francis

Sample Recent Publications

• 1.I. Psaras, V. Tsaoussidis "Why TCP Timers (still) Don't Work Well" Computer Networks Journal (COMNET), Elsevier Science, 2007

• 2. L. Mamatas and V. Tsaoussidis, “Exploiting Energy-saving Potential in Heterogeneous Networks”, International Journal of Parallel, Emergent and Distributed Systems (IJPEDS), Taylor and Francis, 2007

• 3. C. Zhang and V. Tsaoussidis, “TCP Smoothness and Window Adjustment Strategy” The IEEE Transactions on Multimedia , 2006

• 4. 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.1178-1189, 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