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

Communication networks

• Lecture and lab exercises Computer Networks (Rechnernetze) in German
• Lecture and lab exercises Cyber-Physical Networks (CPN) as well as Embedded Systems Communication (ESC)
• Master lecture Automotive Communication Networks (ACN)
• Student projects (Bachelor Thesis, Master Thesis, Study Project, Research Project, etc.)

Winter term 2024/25:

Monday 1:30 - 2:30 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

Journals

• 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

• Michael Scharf, Mahesh Jethanandani, Vishal Murgai, "YANG Data Model for TCP",  IETF RFC 9648, Oct. 2024
• Kent Watson, Michael Scharf, "YANG Groupings for TCP Clients and TCP Servers",  IETF RFC 9643, Oct. 2024
• 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

Books

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

Applied research on communication networks

• Modern applications of TCP/IP (e.g., IoT or Automotive Ethernet)
• Network management and data modeling (e.g., NETCONF/YANG)

Michael Scharf is a contributor to Internet standardization,:

• Chair of the TCPM working group in the IETF from 2011 to 2022
• Designated expert for assignment of TCP/UDP port nummers by IANA since 2022

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