Picture of Michael Scharf

Michael Scharf

Stuttgart, Germany
Research engineer


Dr.-Ing. and Dipl.-Ing. degrees in electrical engineering from the University of Stuttgart (equivalent to PhD and MSc). The work on my Dissertation (PhD thesis) Fast Startup Internet Congestion Control Mechanisms for Broadband Interactive Applications laid the ground for RFC 6928.

Honors and Awards

  • Bell Labs teamwork award (2013)
  • PhD thesis prize of Thomas-Gessmann-Foundation (2012)
  • Prize of Anton- and Klara-Roeser-Foundation for excellent Dr.-Ing., Dipl.-Ing., and pre-diploma degree (2012, 2003, 2000)
  • Scholarship from the German National Academic Foundation (2001-2003)
  • Prize of Richard-Hirschmann-Foundation for excellent study results (2001)
  • Second prize in the German federal competion of mathematics (1996)

Professional Activities

Selected Articles and Publications


  • Michael Scharf, "Comparison of end-to-end and network-supported fast startup congestion control schemes", Computer Networks Volume 55, Issue 8, June 2011, pages 1921-1940
  • Simon Hauger, Michael Scharf, Jochen Koegel, Chawapong Suriyajan, "Evaluation of Router Implementations for Explicit Congestion Control Schemes", Journal of Communications, Vol. 5, No. 3, March 2010, pp. 197-204
  • Sebastian Kiesel, Michael Scharf, "Modeling and performance evaluation of transport protocols for firewall control", Computer Networks, Elsevier, Volume 51, Issue 11, Aug. 2007, Pages 3232-3251


  • Michael Scharf, Gordon Wilfrong, Lisa Zhang, "Sparsifying Network Topologies for Application Guidance", Proc. IFIP/IEEE Symposium on Integrated Network and Service Management (IM), May 2015
  • Michael Scharf, Thomas Voith, Manuel Stein, Volker Hilt, "ATLAS: Accurate Topology Level-of-Detail Abstraction System", Proc. IEEE Network Operations and Management Symposium (NOMS), May 2014
  • Michael Scharf, Vijay Gurbani, Thomas Voith, Manuel Stein, W. Roome, Greg Soprovich, Volker Hilt, "Dynamic VPN Optimization by ALTO Guidance", Proc. EWSDN Workshop, Oct. 2013
  • Amanpreet Singh, Carmelita Goerg, Andreas Timm-Giel, Michael Scharf, Thomas-Rolf Banniza, "Performance Comparison of Scheduling Algorithms for Multipath Transfer", Proc. IEEE Globecom, Dec. 2012
  • Michael Scharf, Thomas Voith, W. Roome, Bob Gaglianello, Moritz Steiner, Volker Hilt, Vijay K. Gurbani, "Monitoring and Abstraction for Networked Clouds", Proc. ICIN, Oct. 2012, Best presentation/demo award
  • Vijay Gurbani, Michael Scharf, T. V. Lakshman, Volker Hilt, Enrico Marocco, "Abstracting network state in Software Defined Networks (SDN) for rendezvous services", Proc. Workshop on Software Defined Networks (SDN'12), Co-located with the IEEE International Conference on Communications (ICC), June 2012
  • Dominik Klein, Rastin Pries Michael Scharf, Michael Soellner, Michael Menth, "Modeling and Evaluation of Address Resolution Scalability in VPLS", Proc. IEEE ICC, June 2012
  • Michael Scharf, Thomas-Rolf Banniza, "MCTCP: A Multipath Transport Shim Layer", Proc. IEEE Globecom, Dec. 2011
  • Dominik Klein, Michael Menth, Rastin Pries, Michael Scharf, Michael Soellner, "A Subscription Model for Time-Scheduled Data Transfers", Proc. 12th IFIP/IEEE International Symposium on Integrated Network Management (IM'2011), 2011
  • Mirja Kuehlewind, Michael Scharf, "Implementation and Performance Evaluation of the re-ECN Protocol", 3rd Workshop on Economic Traffic Management, Springer LNCS 6236, Sept. 2010, pp. 39-50
  • Amanpreet Singh, Christoph Nass, Andreas Timm-Giel, Peter Schefczik, Horst Roessler, Michael Scharf, "Generic Connectivity Architecture for Mobility and Multipath Flow Management in the Future Internet", Second International ICST Conference on Mobile Networks And Management (MONAMI), Sept. 2010, Springer Lecture Notes of ICST (LNICST)
  • Michael Scharf, Mike Eissele, Christian Mueller, Thomas Ertl, "Speeding up the 3D Web: A Case for Fast Startup Congestion Control", PFLDNeT, Tokyo, Japan, May 2009
  • Michael Scharf, "Work in Progress: Performance Evaluation of Fast Startup Congestion Control Schemes", Proc. Networking 2009, Springer LNCS 5550, May 2009, pp. 716-727
  • Jochen Koegel, Stefan Wahl, Michael Scharf, Marc Necker, "Load sharing in a distributed IMS Architecture", Proc. IEEE VTC 2009 Spring, Barcelona, Spain, April 2009
  • Magnus Proebster, Michael Scharf, Simon Hauger, "Performance Comparison of Router Assisted Congestion Control Protocols: XCP vs. RCP", Proc. 2nd International Workshop on the Evaluation of Quality of Service through Simulation in the Future Internet, Rome, Italy, March 2009
  • Simon Hauger, Michael Scharf, Jochen Koegel, Chawapong Suriyajan, "Quick-Start and XCP on a Network Processor: Implementation Issues and Performance Evaluation", Proc. IEEE HPSR 2008, Shanghai, China, May 2008
  • Michael Scharf, Haiko Strotbek, "Performance Evaluation of Quick-Start TCP with a Linux Kernel Implementation", Proc. Networking 2008, Springer LNCS 4982, May 2008, pp. 703-714
  • Michael Scharf, Simon Hauger, Jochen Koegel, "Quick-Start TCP: From Theory to Practice", Proc. PFLDnet 2008, Manchester, UK, March 2008
  • Michael Scharf, "Performance Analysis of the Quick-Start TCP Extension", Proc. IEEE Broadnets, Raleigh, NC, USA, Sept. 2007
  • Stephan Wanke, Michael Scharf, Sebastian Kiesel, Stefan Wahl, "Measurement of the SIP Parsing Performance in the SIP Express Router", Proc. EUNICE 2007, LNCS 4606, Springer Verlag, 2007, pp. 103-110
  • Stephan Lueck, Christian M. Mueller, Michael Scharf, Robert Fetscher, "Algorithms for Hotspot Coverage Estimation based on Field Strength Measurements", Proc. IEEE VTC Spring 2007, Dublin, Ireland
  • Michael Scharf, Sebastian Kiesel, "Head-of-Line Blocking in TCP and SCTP: Analysis and Measurements", Proc. IEEE Globecom, San Francisco, CA, USA, Nov. 2006
  • Sebastian Kiesel, Michael Scharf, "Modeling and Performance Evaluation of SCTP as Transport Protocol for Firewall Control", Proc. IFIP Networking Conference, Coimbra, Portugal, May 2006, LNCS 3976, Springer Verlag, pp. 451-462, 2006
  • Bernd Gloss, Michael Scharf, Daniel Neubauer, "Location-Dependent Parametrization of a Random Direction Mobility Model", Proc. IEEE Vehicular Technology Conference, Spring 2006, Melbourne, Australia
  • Michael Scharf, "On the Response Time of Large-scale Composite Web Services", Proc of the 19th International Teletraffic Congress (ITC 19), Beijing, 2005, pp. 1807-1816
  • Stephan Lueck, Michael Scharf, Jorge Gil, "An Architecture for Aquisition and Provision of Hotspot Coverage Information", Proc. 11th European Wireless, Nicosia, 2005, pp. 287-293
  • Marc Necker, Michael Scharf, Andreas Weber, "Performance of TCP and HTTP Proxies in UMTS Networks", Proc. 11th European Wireless, Nicosia, 2005, pp. 504-513
  • Marc Necker, Michael Scharf, Andreas Weber, "Performance of Different Proxy Concepts in UMTS Networks", G. Kotsis and O. Spaniol (Eds.): Mobile and Wireless Systems, LNCS 3427, Springer-Verlag, 2005, pp. 36-51.
  • Michael Scharf, Marc C. Necker, Bernd Gloss, "The Sensitivity of TCP to Sudden Delay Variations in Mobile Networks", Proc. 3rd IFIP-TC6 Networking Conference, LNCS 3042, Springer-Verlag, 2004, pp. 76-87
  • Michael Wolf, Michael Scharf, "Evaluation of Mobility Management Approaches for IPv6 based Mobile Car Networks", Proc. Kommunikation in Verteilten Systemen (KiVS), 2003


  • Moritz Steiner, Bob Gaglianello, Vijay Gurbani, Volker Hilt, W. D. Roome, Michael Scharf, Thomas Voith, "Network-Aware Service Placement in a Distributed Cloud Environment", Demo at ACM SIGCOMM, Helsinki, Finland, 2012
  • Michael Scharf, Thomas-Rolf Banniza, "An Initial Prototype of Multi-Connection TCP Transport", Demo at EuroView 2010, Wuerzburg, Germany, Aug. 2010

Request for Comments (RFCs)

  • Sebastian Kiesel, Martin Stiemerling, Nico Schwan, Michael Scharf, Haibin Song, "Application-Layer Traffic Optimization (ALTO) Server Discovery", IETF RFC 7286, Nov. 2014
  • Michael Scharf, Alan Ford, "MPTCP Application Interface Considerations", IETF RFC 6897, March 2013
  • Dimitri Papadimitriou, Michael Welzl, Michael Scharf, Bob Briscoe, "Open Research Issues in Internet Congestion Control", IRTF RFC 6077, Feb. 2011

List of my publications at the Institute of Communication Networks and Computer Engineering (IKR) at the University of Stuttgart


At least 2 patent filings per year