Klaus Wehrle (Professor)

Klaus Wehrle, Dr.-Ing., Professor





RWTH Aachen University
Chair of Communication and Distributed Systems (COMSYS, Informatik 4) 
Ahornstraße 55, building E3, office 9011
D-52074 Aachen / Germany

Phone: (+49) 241/80-21402, Fax: (+49) 241/80-22222
Email: wehrle <at> comsys.rwth-aachen.de





Email / Exam Policy

Email / Exam Policy


Exam Dates and Procedure:

Dates for oral exams are offered biweekly, every second Wednesday from 3pm till 6pm.

If you plan to do an oral exam, please follow this procedure:

  1. reserve a slot in advance at the COMSYS office (office(at)comsys.rwth-aachen.de) with mentioning your study program and the planned lectures to be examined. We will confirm the combination subsequently. Please download our examination sheet, fill it in, and keep it till you exam date.
  2. confirm the exam slot latest four weeks ahead of your exam at the COMSYS office (office(at)comsys.rwth-aachen.de). but be sure, that you are well prepared for the exam at that time.
  3. if you plan to have an oral exam with two professors, please check first the availability of slots with the ComSys office and then find a joint date with the other examiner. Then book the final date at the ComSys office.
  4. after reserving a slot please register at ZPA (Central Exam Registry, Zentrales Prüfungsamt) for the oral exam! As for all other exams, a registration with ZPA is mandatory before the exam date. Note that on our examination sheet you have to sign that you are registered with ZPA.
  5. bring the examination sheet with you on the exam day, and hand it over to us at the beginning of the exam.

For teaching related emails, please use the following mail address: teaching (at) comsys.rwth-aachen.de If you are looking for a second advisor (Zweitgutachter) for your Bachelor's / Master's thesis, please consult the following website.

For scientific, project or other research/universiy-related purposes,
please use the following address: wehrle (at) comsys.rwth-aachen.de



Klaus Wehrle is professor of Computer Science and head of the Chair of Communication and Distributed Systems (Informatik 4) at RWTH Aachen University, and affiliated researcher at the Fraunhofer Institute FKIE. 

He received his Diploma (1999) and PhD (Dr.-Ing., 2002) degrees from University of Karlsruhe (now KIT), both with honors. His doctoral thesis on flexible and scalable quality-of-service mechanisms for the next generation Internet was awarded with the Doctoral Dissertation Award of Südwestmetall Association and the FZI Doctoral Dissertation Award (Research Center for Information Technologie, FZI).

In 2002 and 2003, Klaus was postdoctoral researcher at the International Computer Science Institute at University of California at Berkeley (UCB).
In 2004 he was awarded a DFG Emmy Noether (starting) grant and established a junior research group on Protocol Engineering and Distributed Systems at University of Tübingen. 
In 2006, he joined RWTH Aachen University as associate professor, since 2010 as full professor. From 10/2019 till 03/2022 he served as acting head of the Computer Science Department of RWTH Aachen University.

His research activities are focused on (but not limited to) engineering of networking protocols, (formal) methods for protocol engineering and network analysis, network simulation, reliable communication software as well as all operating system issues of networking. 
His research is mainly funded by German Science Foundation (Deutsche Forschungsgemeinschaft, DFG), by the European Research Council (through an ERC CoG and an ERC PoC Grant), the EU, the German government (BMBF, BMWi), the state of NRW and by industrial partners.
Currently, he is co-coordinating the DFG Priority Programme on Cyber-Physical Networking.

He is a member of IEEE, ACM, Sigcomm, GI (German Informatics Society), VDE, and GI/ITG-Fachgruppe KuVS.
He serves as representative for the fields EE and CS in the main evaluation board of Alexander-von-Humboldt Foundation and served as elected representative for communication systems (DFG Fachkollegiat) at the German Science Foundation (DFG). 
Klaus was awarded Junior Researcher of the Year (2007) by the German Association of Professors (Dt. Hochschulverband).
He is member of ACATECH, the German National Academy of Science and Engineering. 




Proceedings of Workshop on Peer-to-Peer-Systems and -Applications Volume 61of LNI, page 143-146.
Gesellschaft für Informatik (GI)
Publisher: Gesellschaft für Informatik (GI), Bonn, Germany
February 2005
ISBN: 3-88579-390-3
Olaf Landsiedel, Klaus Wehrle, Ben L Titzer, and Jens Palsberg
Enabling Detailed Modeling and Analysis of Sensor Networks
Special Issue on Sensor Networks, PIK Journal, 28(2)
IP-QoS: Flexible and Scalable Quality-of-Service with Differentiated Services
Chapter xx, page 33 pages.
Publisher: CRC Press,
Simon Rieche, Heiko Niedermayer, Stefan Götz, and Klaus Wehrle
Reliability and Load Balancing in Distributed Hash Tables
of Lecture Notes in Computer Science, LNCS
Chapter 9, page 119-135.
Publisher: Springer, Heidelberg, Germany
Selected Distributed Hash Table Algorithms
of Lecture Notes in Computer Science, LNCS
Chapter 8, page 95-117.
Publisher: Springer, Heidelberg, Germany
Distributed Hash Tables
of Lecture Notes in Computer Science, LNCS
Chapter 7, page 79-93.
Publisher: Springer, Heidelberg, Germany
Leo Petrak, Olaf Landsiedel, and Klaus Wehrle
Towards Realistic Strategy-Based Mobility Models for Ad Hoc Communication
Proceedings of the 2005 Conference on Software for Communication Systems and Computer Networks
Olaf Landsiedel, Katharina Lehmann, and Klaus Wehrle
T-DHT: Topology-Based Distributed Hash Tables
Proceedings of Fifth International IEEE Conference on Peer-to-Peer-Computing, Konstanz, Germany
Project AEON
Proceedings of the 4th GI/ITG KuVS Fachgespräch "Wireless Sensor Networks", Techical Report No. 481, page 72-76.
Zürich, CH
Proceedings of the First ACM International Workshop on Multimedia Service Composition at International Multimedia Conference, page 31-36.
Publisher: ACM, New York, NY, USA
ISBN: 1-59593-245-3
Dilip Joseph, Jayanthkumar Kannan, Ayumu Kubota, Ion Stoica, and Klaus Wehrle
Document number: UCB/CSD-005/1397
University of California at Berkeley, UCB, Berkeley, USA


Simon Rieche, Leo Petrak, and Klaus Wehrle
Proceedings of LCN 2004 – 29th IEEE Conference on Local Computer Networks , page 15-23.
Publisher: IEEE Press,
November 2004
ISBN: 0-7695-2260-2
Reliability of Data in Structured Peer-to-Peer Systems
Proceedings of HOT-P2P '04: Hot Topics in Peer-to-Peer Computing at 12th Annual Meeting of the IEEE International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS), page 108-113.
October 2004
Simon Rieche, Leo Petrak, and Klaus Wehrle
Comparison of Load Balancing Algorithms for Structured Peer-to-Peer Systems
Proceedings of Workshop on Algorithms and Protocols for Efficient Peer-to-Peer Applications (PEPPA), GI-Jahrestagung Informatik 2004 Volume 51of LNI
Publisher: GI. LNI, Bonn, Germany
September 2004
Tobias Heer, Heiko Niedermayer, Leo Petrak, Simon Rieche, and Klaus Wehrle
On the Use of Structured P2P Indexing Mechanisms in Mobile Ad-Hoc Scenarios
Proceedings of Workshop on Algorithms and Protocols for Efficient Peer-to-Peer Applications (PEPPA), GI-Jahrestagung Informatik 2004, Bonn, Germany Volume 51of LNI, page 239-244.
Publisher: GI. LNI, Bonn, Germany
September 2004
ISBN: 3-88579-380-6
Ralf Steinmetz and Klaus Wehrle
Peer-to-Peer-Networking & -Computing
Informatik-Spektrum, 27(1):51-54
Integrierte Konstruktionsmethoden für flexible Protokolle in ubiquitären Kommunikationssystemen
Proceedings of the GI/ITG KuVS Fachgespräch Systemsoftware für Pervasive Computing
Stuttgart, Germany
Content-oriented Bridging of Today's Internet Heterogeneity
Service Management and Self-Organization in IP-based Networksof Dagstuhl Seminar Proceedings
Publisher: Internationales Begegnungs- und Forschungszentrum fuer Informatik (IBFI), Schloss Dagstuhl, Germany,
Karthik Lakshminarayanan, Ion Stoica, and Klaus Wehrle
Proceedings of ACM Multimedia 2004
New York, USA
Jayanthkumar Kannan, Ayumu Kubota, Karthik Lakshminarayanan, Ion Stoica, and Klaus Wehrle
Technical Report
Document number: UCB/CSD-04-1342
University of California at Berkeley, UCB, Berkeley, USA
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A small note for potential applicants

A small note for potential applicants

Please note:

The COMSYS Team is a very open-minded and technology-oriented research group. But we are receiving dozens of (mostly unserious spam-)applications per week. To focus on serious applications, we only accept applications sent in by non-electronic mail. Email applications will neither be processed, nor answered, nor accepted.

Email applications of any kind will be deleted immediately!

If you are seriously considering to apply for a position (researcher, PhD student, teaching assistant, internship, student research assistant) within the COMSYS Team, please spend the small amount of postage for sending your application by postal mail -- you will definitely get an answer. Many thanks for your cooperation!

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