Nikolaos Efthymiopoulos

Postdoctoral Researcher
Network Architectures & Management Group
Electrical & Computer Engineering Dept
University of Patras
26500 Patras
nefthymiop [at] Phone:

Short Bio

I was born in 1980. In 2010 i received my Phd from University of Patras, Greece. Since 2007 I have worked as a Lecturer in Telecommunications Systems and Networks Department and since 2009 as as an Assistant Professor in Informatics & MM Department in Greece. My main research interests are network optimization, distributed video streaming, distributed searching and achieving QoS in content distribution networks. Since 2004 I have participated in various ICT projects. I have around 15 publications in these areas.


  1. Efthymiopoulos N., A. Christakidis, S. Denazis and O. Koufopavlou, “QoS – LiquidStream: Scalable monitoring and bandwidth control in P2P live streaming”, Dec 2011 (pending – contact
  2. Efthymiopoulos N. ,A. Christakidis ,S. Denazis and O. Koufopavlou, “Liquidstream – network dependent dynamic P2P live streaming”, Springer Journal in Peer-to-Peer Networking and Applications, Mar 2011, Vol. 4, No 1, pp. 50-62 (pdf)
  3. Christakidis A., N. Efthymiopoulos, J. Fiedler, S. Dempsey, K. Koutsopoulos , S. Denazis, S. Tombros, S. Garvey and O. Koufopavlou, “VITAL++ a new communication paradigm: embedding P2P technology in next generation networks”, IEEE Communications Magazine, Jan 2011, Vol. 49, No 1, pp. 84-91 (pdf)
  4. Efthymiopoulos N., S. Tompros, A. Christakidis, K. Koutsopoulos and S. Denazis, “Enabling live video streaming services realization in telecommunication networks using P2P technology”, Wiley International Journal of Communication Systems, Oct 2011, Vol. 24, Issue 10,pp. 1354-1374 (pdf)
  5. Christakidis A., J. Fiedler, N. Efthymiopoulos, K. Koutsopoulos, S. Denazis, S. Tombros, S. Dempsey and O. Koufopavlou, “Integrating P2P with Next Generation Networks”, River Publishers Series in Communications, Advances in Next Generation Services and Service Architectures. ISBN: 978-87-92329-55-4.
  6. Efthymiopoulos N., “Deploying and experimenting with new control architectures: The VITAL++ case.”, 3rd EU-Japan Symposium on the “Future Internet”, October 2010, Tampere, Finland
  7. Efthymiopoulos N., “VITAL++ Peer-to-Peer Content Distribution – Architecture and Technical Solutions”, Workshop: Identifying Enabling Technologies for Future Internet Experimentation, TEMU 2010, Crete, Greece
  8. Christakidis A., N. Efthymiopoulos, S. Denazis and O. Koufopavlou, “On the architecture and the design of P2P live streaming system schedulers”, International conference on ultra modern telecommunications, ICUMT, 12-14 Oct 2009, pp. 1-8, St. Petersburg , Russia (pdf)
  9. Efthymiopoulos N., A. Christakidis, S. Denazis and O. Koufopavlou, “L-CAN: Locality aware structured overlay for P2P live streaming.”, Springer 2008, Lecture Notes in Computer Science, Volume 5274/2008, pp. 77-90 (pdf)
  10. Christakidis A., N. Efthymiopoulos, S. Denazis and O. Koufopavlou, “P2P-InfoReflect: Dynamic Locality-Aware and Multi-Balanced Overlay for Network Dependent Applications & Services”, The IEEE International Workshop On Peer-to-Peer Web Services, China, 25-27 Sept. 2008, pp. 929 – 934 (pdf)
  11. Koumoutsos G., K. Lampropoulos, N. Efthymiopoulos, A. Christakidis, S. Denazis and K. Thramboulidis, “An Intermediate Framework for Unifying and Automating Mobile Communication Systems”, in Lecture Notes in Computer Science, Springer 2006, Volume 4195/2006, 298-314 (pdf)
  12. Efthymiopoulos N., A. Christakidis, S. Denazis and O. Koufopavlou, “Enabling locality in a balanced peer to peer overlay”, IEEE Globecom 2006 – in World Class Solutions – Networking the Globe Symposium, Nov. 2006, pp. 1-5 (pdf)

Technical Reports

  1. Konstantinos Deltouzos, Ilias Gkortsilas,Nikolaos Efthymiopoulos, Spyros Denazis. UoP Tech Report 2012 on P2P Video on Demand (pdf)