Dr. Merkourios Karaliopoulos

ETH Zürich
Dr. Merkourios Karaliopoulos
Inst.f.Techn.Informatik u.Kommunik.Netze
ETZ G 90
Gloriastrasse 35
8092 Zürich

Phone: +41 44 632 70 17
E-Mail: 

Since April 2007 I have been a postdoctoral researcher in the Communication Systems Group of ETH Zurich.

Almost all my prior work has been oriented towards engineering infrastructure-based cellular networks.
The PhD Thesis in the Communication Systems Research, University of Surrey, UK, was entitled "Support of elastic TCP traffic over broadband geostationary satellite networks". It was supervised by Prof. B. Evans and Prof. R. Tafazolli and proposed transport-layer mechanisms for the treatment of TCP traffic over satellite networks and studied their interaction with MAC-layer scheduling, using both analysis and simulation. Project work in parallel evolved around Satellite Digital Multimedia Broadcasting (SDMB), a system designed by the ex-Alcatel Space, now Thales Alenia Space, for broadcasting content to mobile users all over Europe.

During 2006, I spent one year as a postdoctoral researcher in the Computer Science department of University of North Carolina, Chapel Hill, USA. My project was on measurement-based modeling of traffic and mobility in large-scale Wireless Local Area Networks (WLANs) and was supervised by Assistant Prof. Maria Papadopouli. It involved collection of syslog, SNMP, and packet header traces, derivation of models and their validation with simulation.

After joining CSG my work has been reoriented towards infrastructureless networks with elements of self-organisation to better align with the group research interests. Nevertheless, it largely remains focused on the same problems within the broader area of wireless networking and is carried out jointly with CSG graduate students and external collaborators using analysis, simulation, and testbed experimentation.

More...

Research interests

• routing and transport in wireless multihop networks
• self-organizing networks of robotic nodes
• resilience of wireless ad hoc networks to node failures and misbehaviors
• reliable transport in hybrid wireless network

Projects

• ResumeNet

Teaching activities (HS 2008)

• Lectures in the context of the Advanced Topics in Communication Networks (ATCN) course.
  Together with Dr. Thrasyvoulos Spyropoulos

Semester/Master Theses

• Design trade-offs in networks of robotic nodes
• 
  Adding robot swarm control algorithms in packet-level network simulators
• 
  Monitoring and Management tools for the TIK Wireless Testbed
• 
  Connectivity in wireless ad hoc networks under realistic radio propagation models

There is also a constant thread of activities related to the evolution and update of the TIKNET Wireless Multihop Network testbed. If you are interested in this topic, let me know...

Selected publications

Journal papers

• Providing Proportional TCP Performance by Fixed-point Approximations over Bandwidth on Demand Geostationary Satellite Networks
  W. Chai, M. Karaliopoulos, and G. Pavlou
  to appear in IEEE Transactions in Wireless Communications, first half of 2009
• Integrating Packet-Level FEC with Data Carousels for Reliable Content Delivery in Satellite Broadcast/Multicast Systems
  M. Chipeta, M. Karaliopoulos, L.Fan and B. Evans
  International Journal of Satellite Communications and Networking, 2nd half of 2006 (invited)
• Demonstration with field trials of a satellite-terrestrial synergistic approach for digital multimedia broadcasting to mobile users
  EU R&D project MoDiS Consortium
  IEEE Wireless Communications Magazine, October 2005
  pdf
• Providing differentiated services to TCP flows over bandwidth on demand geostationary satellite networks
  M. Karaliopoulos, R. Tafazolli and B. Evans
  IEEE JSAC special issue on broadband IP networks over satellites, February 2004
  pdf
• Satellite radio interface and radio resource management strategy for the delivery of multicast/broadcast services via an integrated satellite-terrestrial system
  M. Karaliopoulos et al
  IEEE Communications Magazine, September 2004
  pdf
• S-UMTS access network for broadcast and multicast service delivery: the SATIN approach
  K. Narenthiran, M. Karaliopoulos et al (EU project SATIN Consortium)
  International Journal of Satellite Communications and Networking, Jan-Feb 2004
  pdf
• Packet scheduling for the delivery of multicast/broadcast services via S-UMTS (extended version)
  M. Karaliopoulos, K. Narenthiran, P. Henrio, E. Angelou and B. Evans
  International Journal of Satellite Communications and Networking, September 2004 (invited paper)
  pdf
• Modeling the land mobile satellite channel: a review
  M.Karaliopoulos and F-N. Pavlidou
  IEE Electronics and Communication Engineering Journal, October 1999
  pdf

Book chapter

• Routing Metrics for Wireless Mesh Networks
  G.Parissidis, M. Karaliopoulos, R. Baumann, T. Spyropoulos, B. Plattner
  Guide to Wireless Mesh Networks, Springer, Fall 2008

PhD Thesis

• Support of elastic TCP traffic over geostationary satellite networks
  M. Karaliopoulos
  Thesis for award of Doctor of Philosophy, University of Surrey, April 2004
  pdf, ps

Conference papers

• On Leveraging Partial Paths in Partially-connected Networks
  S. Heimlicher, M. Karaliopoulos, H. Levy, T. Spyropoulos
  IEEE Infocom 09, Rio de Janeiro, Brasil, April 2009
• Interference in Wireless Multihop Networks: A Model and its Experimental Evaluation
  G.Parissidis, M. Karaliopoulos, M. May, T. Spyropoulos, B. Plattner
  IEEE WoWMoM 2008, Newport Beach, U.S.A., June 2008 (extended paper)
• End-to-end vs. Hop-by-hop Transport under Intermittent Connectivity
  S. Heimlicher, M. Karaliopoulos, H. Levy, M. May
  Proceedings of Autonomics 2007, Rome, Italy, October 2007 (invited paper)
• On scalable measurement-driven modelling of traffic demand in large WLANs
  M. Karaliopoulos, M. Papadopouli, E. Raftopoulos and H. Shen
  IEEE Workshop on Local and Metropolitan Area Networks, Princeton NJ, USA, June 10-13, 2007 (invited paper)
  pdf
• Providing Relative Service Differentiation to TCP Flows over Split-TCP Geostationary Bandwidth on Demand Satellite Networks
  W. K. Chai, M. Karaliopoulos, G. Pavlou
  5th International Conference on Wired/Wireless Internet Communications (WWIC), Coimbra, Portugal, 23-25 May, 2007
• Spatio-Temporal Modeling of Traffic Workload in a Campus WLAN
  Felix Campos, Merkourios Karaliopoulos, Maria Papadopouli, Haipeng Shen
  2nd International Wireless Internet Conference (WICON06), Boston, MA, August 2-5, 2006
  pdf
• Modeling roaming in large-scale wireless networks using real measurements
  M. Papadopouli, M. Moudatsos and M. Karaliopoulos
  IEEE WoWMoM 2006, Niagara Falls, Buffalo, NY, June 2006
• Scheduling for Proportional Differentiated Service Provision in Geostationary Bandwidth on Demand satellite networks
  W.K. Chai, M. Karaliopoulos and G. Pavlou
  IEEE GLOBECOM 2005, St. Louis, MO, USA, November 2005
• Designing the reliable transport layer for Satellite Digital Multimedia Broadcasting
  M. Chipeta, M. Karaliopoulos, B. Evans, B. Garnier and L. Roullet
  14th IST Mobile and Wireless Telecommunications Summit, Dresden, Germany, June 2005
• Modelling split-TCP latency and buffering requirements in broadband GEO satellite networks
  M. Karaliopoulos, R. Tafazolli and B. Evans
  IEEE WCNC 2005, New Orleans, LA USA, March 2005
  pdf
• Fixed-point approximations for TCP performance over GEO satellite links
  M. Karaliopoulos, R. Tafazolli and B. Evans
  IEEE ICC 2004, Disneyland Paris, France, June 2004
  pdf
• Radio resource management strategy in SATIN
  M. Karaliopoulos, E. Angelou, I. Andrikopoulos, P. Henrio and B. Evans
  12th IST Summit on Mobile and Wireless Communications, Aveiro, Portugal, June 200
  pdf
• On the interaction of TCP with BoD in GEO broadband satellite networks
  M. Karaliopoulos, R. Tafazolli and B. Evans
  IEEE GLOBECOM 2002, Taipei, Taiwan, November 2002
  pdf

For the full list of publications, refer to my personal page.