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Dr.-Ing. Tessa Tielert

tessa tielertPqi6∂kit edu

Forschungsbereich DSN
Institut für Telematik
Karlsruher Institut für Technologie (KIT)

Geb. 20.52
Engesserstr. 6
D-76131 Karlsruhe

About me

In December 2008 I finished my studies of computer science at the University of Karlsruhe with emphasis in telematics and cryptography. During my studies I worked as a student research assistant in the group of Prof. Hartenstein for two years, focusing on the implementation of the physical and medium access layer in the network simulator ns-2 and on the effect of the overhead of cryptography on protocol performance in Inter-Vehicle Communication (IVC). The topic of my diploma master thesis (equivalent to master thesis) was on the microscopic analysis of information dissemination in IVC.

Between February 2009 and January 2012 I was a member of the research training group "Self-organizing Sensor-Actuator-Networks" and of the Decentralized Systems and Network Services Research Group at the Institute of Telematics. Within the research training group, I worked in the subproject "K1 - Capacities, Protocols and Architectures". My research focuses on Vehicle-to-X (V2X) communications in general as a use case of wireless sensor networks. More precisely, my focus is on two aspects of V2X:

The first aspect of my work deals with IVC applications aiming at improving traffic safety. These applications are typically based on the periodic exchange of status messages containing a vehicle's current position, speed, etc. Based on the reception of these messages, vehicles can build a mutual awareness of each other's presence. However, since the available bandwidth is limited, the communication channel can easily become congested when vehicle density is high and the transmission rate and power of the periodic messages are not regulated.
In a joint work with Mercedes-Benz Research & Development North America, Inc., I'm investigating how vehicles can adapt the transmission rate of their periodic messages without violating the requirements of safety applications. We have developed a congestion control protocol named PULSAR which was introduced at VNC 2011 in Amsterdam, where the paper received the Best Paper Award.

The second aspect of my work focuses on how V2X communication can help to reduce fuel consumption and emissions of conventional vehicles as well as the energy consumption of electric vehicles. In collaboration with the Technical University of Graz, I'm analyzing especially the applications traffic-light-to-vehicle communication (aka Green Light Optimized Speed Avisory) and dynamic vehicle routing.


11/2012 Best Paper Award at the International Conference on Intelligent Transport Systems Telecommunications (ITST) 2012 in Taipeh for the paper "Can V2X Communication Help Electric Vehicles Save Energy?"


Member of the Specialist Task Force (STF) 447 of the European Telecommunications Standards Institute (ETSI)
11/2011 Best Paper Award at the Vehicular Networking Conference (VNC) 2011 in Amsterdam for the paper "Design Methodology and Evaluation of Rate Adaptation Based Congestion Control for Vehicle Safety Communications"


Research stay/ internship at Mercedes-Benz Research & Development North America, Inc.


Researcher at the Institute of Telematics, Decentralized Systems and Network Sercives research group, Karlsruhe Institute of Technology (KIT)

Student assistant at the Institute of Telematics, Decentralized Systems and Network Sercives research group, Karlsruhe Institute of Technology (KIT)
10/2001-12/2008 Studies of computer science at the University of Karlsruhe (TH), graduation as Diplom-Informatikerin (equivalent to M.Sc.)

Journal Articles

Refereed Conference Contributions



Technical Reports

Courses summer term 2014
title type semester place
Practical course SS 2014

Courses winter term 2012/13
title type semester place
Lecture on appointment

Courses winter term 2011/12
title type semester place
lecture on appointment
seminar SR 367, Building 20.20

Courses summer term 2011
title type semester place
Lecture Summer term 2011
Practical course Summer term 2011 K-Pool (Room 114.1, building 20.21)
seminar Summer term 2011 Engesserstr. 2 (E2, building 20.50), 1st level

Courses summer term 2010
title type semester place
Lecture Summer term 2010
Practical Course Summer term 2010 will be announced in the lecture

Courses summer term 2009
title type semester place
Lecture SR 217, RZ (Building 20.21)
practical course tba