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. 




RWTH Aachen, Aachen, Germany
July 2007
Simon Rieche, Klaus Wehrle, Marc Fouquet, Heiko Niedermayer, Leo Petrak, and Georg Carle
Proceedings of 4th Annual IEEE Consumer Communications and Networking Conference (CCNC 2007) , page 763-767.
Publisher: IEEE Press,
January 2007
RWTH Aachen University - Distributed Systems Group
ISBN: 1-4244-0667-6
Ralf Steinmetz, Klaus Wehrle, and Nicolas Liebau
Peer-to-Peer Systems (Editorial)
Special Issue on Peer-to-Peer of the it - Information Technology Journal, 49(ISSN 0935-3232)
MHT: A Mobility-Aware Distributed Hash Table
Special Issue on Peer-to-Peer of the it - Information Technology Journal, 49(5):298-303
ISSN: 1611-2776
Olaf Landsiedel, Alexis Pimenidis, Klaus Wehrle, Heiko Niedermayer, and Georg Carle
Dynamic Multipath Onion Routing in Anonymous Peer-To-Peer Overlay Networks
IEEE Global Communication Conference (GlobeCom), Washington D.C.
Juri Saragazki, Olaf Landsiedel, and Klaus Wehrle
Simulation von plattformunabhängigen TinyOS-Applikationen mit ns-2
Proceedings of 6th GI/ITG KuVS Fachgespräch "Wireless Sensor Networks"
Aachen, Germany
Stefan Schmitz, Olaf Landsiedel, and Klaus Wehrle
Smart Composition of Sensor Network Applications
Proceedings of 6th GI/ITG KuVS Fachgespräch "Wireless Sensor Networks", Aachen
Aachen, Germany
Oscar Garcia-Morchon, Heribert Baldus, Tobias Heer, and Klaus Wehrle
Cooperative Security in Distributed Sensor Networks
Proceedings of the third International Conference on Collaborative Computing: Networking, Applications and Worksharing, CollaborateCom 2007 Volume 1of 1
Publisher: IEEE, Washington, DC, USA
ISBN: 978-1-4244-1318-8
6. Fachgespräch Sensornetzwerke der GI/ITG Fachgruppe "Kommunikation und Verteilte Systeme"
Proceedings of Workshop
Document number: AIB 2007-11
Distributed Systems Group, RWTH Aachen University, Aachen, Germany


Simon Rieche, Klaus Wehrle, Leo Petrak, and Clemens Wrzodek
Proceedings of 31st IEEE Conference on Local Computer Networks (LCN 2006) , page 509-510.
Publisher: IEEE Press,
November 2006
RWTH Aachen University - Distributed Systems Group
ISBN: 1-4244-0418-5
Simon Rieche, Marc Fouquet, Heiko Niedermayer, Leo Petrak, Klaus Wehrle, and Georg Carle
Technical Report
Document number: WSI-2006-04
RWTH Aachen University - Distributed Systems Group
Wilhelm-Schickard-Institute for Computer Science, University of Tübingen, Tübingen, Germany
August 2006
Olaf Landsiedel, Jó Agila Bitsch Link, Klaus Wehrle, Johannes Thiele, and Hanspeter Mallot
ACM Workshop on Real-World Wireless Sensor Networks (RealWSN) in conjunction with ACM MobiSys, Uppsala, Sweden Volume 1, page 1--2.
Publisher: SICS, Uppsala, Sweden
June 2006
In Proceedings of 3. IEEE International Workshop on Mobile Peer-to-Peer Computing (MP2P'06), Pisa, Italy. Volume 1, page 1-6.
Publisher: IEEE, Washington, DC, USA
March 2006
ISBN: 0-7695-2520-2
Peer-to-Peer-based Infrastructure Support for Massively Multiplayer Online Games
RWTH Aachen University - Distributed Systems Group
Dagstuhl Seminar 06131
Publisher: Dagstuhl,
March 2006
European Workshop on Wireless Sensor Networks (EWSN 2006), Zurich Switzerland Volume 507of Technical Report ETH Zurich / Dept. of Computer Science, page 22 -- 23.
Publisher: Department of Computer Science, ETH Zurich, Zurich, Switzerland
February 2006
When Modularity Matters
5th GI/ITG KuVS Fachgespräch "Wireless Sensor Networks", Stuttgart, Germany
Olaf Landsiedel, Leo Petrak, and Klaus Wehrle
Towards flexible and modular simulation models
Visions of Future Generation Networks, Würzburg, Germany
Dilip A Joseph, Karthik Lakshminarayanan, Ion Stoica, and Klaus Wehrle
OCALA: An Architecture for Supporting Legacy Applications over Overlays
Proceedings of 3rd ACM Sigcomm/ACM Sigops Symposium on Networked Systems Design and Implementation (NSDI 2006)
Publisher: USENIX / ACM,
Proceedings of the Sixth IEEE International Conference on Peer-to-Peer Computing (P2P'06), Cambridge, UK, page 203-209.
Publisher: IEEE, Washington, DC, USA
ISBN: 0-7695-2679-9


Olaf Landsiedel, Simon Rieche, Heiko Niedermayer, Klaus Wehrle, and Georg Carle
Anonymous IP-Services via Overlay Routing
5. Würzburger "Workshop IP Netzmanagement, IP Netzplanung und Optimierung"
March 2005
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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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