Tobias Gansen

Requirements and objectives for secure Traffic Information Systems

Early approaches for Traffic Information Systems (TISs) primarily focused on centralized systems using unidirectional downlink communication and employing wireless broadcast or similar techniques. In general, these centralized TISs were operated by public radio stations, thus there were almost no security issues related to this approach. The situation changes when new Inter Vehicle Communication (IVC) techniques are investigated. The advantages of improved timeliness and accuracy of available traffic information come with a number of security concerns. This paper reviews the requirements and objectives for secure TISs. We outline possible solutions to face the security concerns and clearly depict open issues. In conclusion, we advocate more secure TISs that benefit from recent IVC technologies in a more secure and privacy protecting way.

Simulative performance evaluation of the sim TD Self Organizing Traffic Information System

The simTD (Safe and Intelligent Mobility: Test Field Germany) research project is another step towards bringing Car-to-X technology to marketability. One of its envisioned applications is a Traffic Information System (TIS) based on self-generated maps for vehicles not equipped with digital maps. To assure reliable operation, the function itself, its performance and the effect of its input parameters was simulatively evaluated before it was validated on real vehicles. In this paper we demonstrate how to adequately parameterize and evaluate such a TIS. We find feasible values for the input parameters for the creation of self-generated maps to ensure solid operation of the function. We further contribute to the community and other projects using similar TIS deployments by introducing applicable metrics for TIS evaluation in general and show our findings for the simTD research project.