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.