COMNET Research Unit

1
COMNET Research Unit

• Dept. of Electrical and Computer Engineering
• Democritus University of Thrace, Greece
• http//comnet.ee.duth.gr/comnet/

2
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

3
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

4
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

5
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

6
Topics of Interest

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

7
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

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Energy aspects

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

9
Internetworking with sensors

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