Foto Michael Scharf

Faculty Computer Science and Engineering Prof. Dr.-Ing. Michael Scharf

Esslingen Hilltop Campus
Room: F 01.456
Flandernstraße 101
73732 Esslingen

+49 711 397-4164


Head of Lab communication engineering


Communication networks

consultation hours

Summer term 2023:

Monday 1:00 - 2:00 p.m. (please send an e-mail in advance) or by appointment

During semester break:

By appointment


  • Since Sept. 2018: Professor for communication networks at Hochschule Esslingen - University of Applied Sciences
  • July 2015 - Aug. 2018: Product line manager for network management systems and Distinguished Member of Technical Staff (DMTS) at Alcatel-Lucent and Nokia in Stuttgart
  • Sept. 2009 - June 2015: Research engineer at Alcatel-Lucent Bell Labs in Stuttgart
  • July 2003 - Aug. 2009: Research staff member at the Institute of Communication Networks and Computer Engineering (IKR) of the University of Stuttgart
  • Electrical engineering degree at the University of Stuttgart



  • Michael Scharf, "Comparison of end-to-end and network-supported fast startup congestion control schemes", Computer Networks Volume 55, Issue 8, Jun. 2011, pp. 1921-1940
  • Simon Hauger, Michael Scharf, Jochen Kögel, Chawapong Suriyajan, "Evaluation of Router Implementations for Explicit Congestion Control Schemes", Journal of Communications, Vol. 5, No. 3, Mar. 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, pp. 3232-3251

Conference papers (peer reviewed)

  • Manuel Stein, Michael Scharf, Volker Hilt, "SDN Policy-Driven Service Chain Placement in OpenStack",  Proc. IFIP/IEEE Symposium on Integrated Network Management (IM), May 2017
  • Michael Scharf, Manuel Stein, Thomas Voith, Volker Hilt, "Network-aware Instance Scheduling in OpenStack", Proc. IEEE International Workshop on Manageability and Security of Network Function Virtualization and Software Defined Network (MASONS), Aug. 2015
  • 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/IFIP 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 Görg, 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 IEEE ICC, Jun. 2012
  • Dominik Klein, Rastin Pries Michael Scharf, Michael Soellner, Michael Menth, "Modeling and Evaluation of Address Resolution Scalability in VPLS", Proc. IEEE ICC, Jun. 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. IFIP/IEEE Symposium on Integrated Network and Service Management (IM), 2011
  • Mirja Kühlewind, Michael Scharf, "Implementation and Performance Evaluation of the re-ECN Protocol", 3rd Workshop on Economic Traffic Management, LNCS 6236, Springer-Verlag, Sep. 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", Proc. MONAMI, Lecture Notes of ICST (LNICST), Springer-Verlag, Sep. 2010
  • Michael Scharf, Mike Eissele, Christian Mueller, Thomas Ertl: "Speeding up the 3D Web: A Case for Fast Startup Congestion Control", PFLDNeT 2009 Workshop, May 2009
  • Michael Scharf, "Work in Progress: Performance Evaluation of Fast Startup Congestion Control Schemes", Proc. Networking 2009, LNCS 5550, Springer-Verlag, May 2009, pp. 716-727
  • Jochen Kögel, Stefan Wahl, Michael Scharf, Marc Necker, "Load sharing in a distributed IMS Architecture", Proc. IEEE Vehicular Technology Conference 2009 Spring, Apr. 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, Mar. 2009
  • Simon Hauger, Michael Scharf, Jochen Kögel, Chawapong Suriyajan, "Quick-Start and XCP on a Network Processor: Implementation Issues and Performance Evaluation", Proc. IEEE HPSR 2008, May 2008
  • Michael Scharf, Haiko Strotbek, "Performance Evaluation of Quick-Start TCP with a Linux Kernel Implementation", Proc. Networking 2008, LNCS 4982, Springer-Verlag, May 2008, pp. 703-714
  • Michael Scharf, Simon Hauger, Jochen Kögel, "Quick-Start TCP: From Theory to Practice", Proc. PFLDnet 2008 Workshop, Mar. 2008
  • Michael Scharf, "Performance Analysis of the Quick-Start TCP Extension", Proc. IEEE Broadnets, Sep. 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 Lück, Christian M. Mueller, Michael Scharf, Robert Fetscher: "Algorithms for Hotspot Coverage Estimation based on Field Strength Measurements", Proc. IEEE Vehicular Technology Conference Spring 2007, 2007
  • Michael Scharf, Sebastian Kiesel: "Head-of-Line Blocking in TCP and SCTP: Analysis and Measurements", Proc. IEEE Globecom, Nov. 2006
  • Sebastian Kiesel, Michael Scharf: "Modeling and Performance Evaluation of SCTP as Transport Protocol for Firewall Control", Proc. IFIP Networking 2006, LNCS 3976, Springer Verlag, 2006, pp. 451-462
  • Bernd Gloss, Michael Scharf, Daniel Neubauer: "Location-Dependent Parametrization of a Random Direction Mobility Model", Proc. IEEE Vehicular Technology Conference Spring 2006, 2006
  • Michael Scharf: "On the Response Time of Large-scale Composite Web Services", Proc. 19th International Teletraffic Congress (ITC 19), 2005, pp. 1807-1816
  • Stephan Lück, Michael Scharf, Jorge Gil: "An Architecture for Aquisition and Provision of Hotspot Coverage Information", Proc. 11th European Wireless, 2005, pp. 287-293
  • Marc Necker, Michael Scharf, Andreas Weber: "Performance of TCP and HTTP Proxies in UMTS Networks", Proc. 11th European Wireless, 2005, pp. 504-513
  • Marc Necker, Michael Scharf, Andreas Weber: "Performance of Different Proxy Concepts in UMTS Networks", 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. IFIP Networking 2004, 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

Demonstrations (peer reviewed)

  • 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, 2012
  • Michael Scharf, Thomas-Rolf Banniza: "An Initial Prototype of Multi-Connection TCP Transport", Demo at EuroView 2010, Aug. 2010

Standardization contributions

  • Carles Gomez, Jon Crowcroft, Michael Scharf, "TCP Usage Guidance in the Internet of Things (IoT)", IETF RFC 9006, March 2021
  • Martin Stiemerling, Sebastian Kiesel, Michael Scharf, Hans Seidel, Stevano Previdi, "Application-Layer Traffic Optimization (ALTO) Deployment Considerations", IETF RFC 7971, Oct. 2016
  • 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, Mar. 2013
  • Dimitri Papadimitriou, Michael Welzl, Michael Scharf, Bob Briscoe, "Open Research Issues in Internet Congestion Control", IRTF RFC 6077, Feb. 2011


  • Michael Scharf, "Fast Startup Internet Congestion Control Mechanisms for Broadband Interactive Applications", PhD thesis, University of Stuttgart, 2011 Download

more information

Michael Scharf is a contributor to Internet standardization,:

Further information regarding the lab room F1.308 can be found on the personal page  (in German).

In addition, the page Kommunikationstechnik Labor (KTlab)  (in German) is used for Internet experiments.


Interested? Apply! for the Wintersemester 2023/24