Timpner, Julian and Friedrichs, Stephan and van Balen, Johannes and Wolf, Lars

Intelligent Vehicles Symposium (IV)

Automated valet parking not only improves driving comfort, but can have a considerable impact on the urban land- scape by reducing the required parking space. We present the first study of parking space optimization for automated valet parking with an in-depth theoretical analysis of the parking lot properties under various aspects, inluding the worst-case extraction time, total shunting distance, and the number of shunting operations (each per car). Most importantly, the proposed model bounds all these values. We verify the theoretical properties of our model in four simulated scenarios, one of which is based on real- world data from a downtown parking garage. We show that very good pick-up times of about 1 min are possible with very little overhead in terms of shunting distance and time, while providing a significantly improved parking density as compared to conventional parking lots.

@inproceedings{Timpner2015,
address = {Seoul, Korea},
author = {Timpner, Julian and Friedrichs, Stephan and van Balen, Johannes and Wolf, Lars},
booktitle = {Proceedings of the IEEE
Intelligent Vehicles Symposium (IV)},
keywords = {Automated Vehicles,Cooperative Vehicle-infrastructure Systems,V2X Communication},
month = jun,
publisher = {IEEE},
title = {{k-Stacks: High-Density Valet Parking for Automated Vehicles}},
year = {2015}
}

Julian Timpner, Stephan Rottmann, and Lars Wolf

2^nd GI/ITG KuVS Fachgespräch Inter-Vehicle Communication (FG-IVC 2014)

Future requirements for drastic reduction of CO2 production and energy consumption will lead to significant changes in the way we see mobility in the years to come.
However, the automotive industry has identified significant barriers to the adoption of electric vehicles, including reduced driving range and greatly increased refueling times.
The V-Charge Project, funded by the European Commission, seeks to address these problems simultaneously by developing an electric automated car, outfitted with close-to-market sensors, which is able to automate valet parking and recharging for integration into a future transportation system.
In this paper, we describe the research challenges associated with providing a wireless V2X communication infrastructure for V-Charge-enabled parking areas.

Stephan Rottmann, Julian Timpner, and Lars Wolf

IEEE Vehicular Networking Conference (VNC) 2014

A model electric vehicle performing automated valet parking and charging is demonstrated.
The vehicle’s missions are transmitted using WLAN based vehicle-to-infrastructure communications by a server back-end which has been developed in the EU FP7 project V-Charge.


@inproceedings{Rottmann:VNC:14,
address = {Paderborn, Germany},
doi = {https://dx.doi.org/10.1109/VNC.2014.7013348},
author = {Rottmann, Stephan and Timpner, Julian and Wolf, Lars C},
booktitle = {Proceedings of the IEEE Vehicular Networking Conference (VNC)},
keywords = {Automated valet parking,Demonstrator,V2I,Vehicular Communications},
month = dec,
publisher = {IEEE},
title = {{Demo: Automated Valet Parking and Charging}},
year = {2014},
pages = {207--208},
}


Julian Timpner, Mario Wozenilek, and Lars Wolf

IEEE Vehicular Networking Conference (VNC) 2014

Vehicular ad hoc networks allow connected vehicles to exchange and share information in order to improve traffic efficiency and safety as well as to provide infotainment functions.
In order to cope with the challenging network conditions of the vehicular domain (e.g., intermittent connectivity), a disruption-tolerant networking architecture is suitable.
In contrast to push-based communications (e.g, cooperative awareness messages) used in many proposed vehicular applications, we focus on a query-response model for requesting sensor information.
Of particular interest to us is the question how vehicular queries can be efficiently routed to a destination area in such challenged environments, and, more importantly, how the response can be routed back to a moving query originator.
We therefore present BGR, a novel disruption-tolerant georouting protocol based on a trail of breadcrumbs left by the query originator.
As an overlay protocol, BGR can be used on top of different georouting mechanisms, providing an efficient means to address moving originators.
We study the influence of parameters, e.g., breadcrumb size and distance, and prove the effectiveness of the proposed solution in an extensive experimental evaluation, showing that BGR achieves significantly higher delivery rates compared to traditional geocast approaches, while avoiding up to 97% of the traffic overhead of Epidemic and PRoPHET routing.


@inproceedings{Timpner:VNC:2014,
address = {Paderborn, Germany},
author = {Timpner, Julian and Wozenilek, Mario and Wolf, Lars},
booktitle = {Proceedings of the IEEE Vehicular Networking Conference (VNC)},
keywords = {DTN,Georouting,V2V,VANET},
doi = {https://dx.doi.org/10.1109/VNC.2014.7013308},
month = dec,
publisher = {IEEE},
pages = {49--56},
title = {{Breadcrumb Routing: Query-Reponse Geocast for Mobile Originators in
Vehicular Networks}},
year = {2014},
}


Julian Timpner, Domink Schürmann, and Lars Wolf

ACM Workshop on Security, Privacy and Dependability for Cyber Vehicles (CyCAR ’13)

Intelligent Transportation Systems that rely on Vehicle-to- Cloud communications are emerging. Of particular inter- est to us is the question how drivers can securely register their vehicle with cloud services and deploy keys for secur- ing vehicular communications. We therefore present a secure smartphone-based registration and key deployment process for these applications. We combine an adapted OAuth flow for Smartphone-to-Cloud communications with a novel key deployment mechanism for Public Key Infrastructures in ve- hicular networks. The primary contributions of the proposed key deployment process are a high degree of independence from central authorities and feasible security audits due to an open protocol design. As an instance of future Intelligent Transportation System applications that facilitate Vehicle- to-Cloud communications, we utilize the V-Charge project as a running example to discuss potential attack scenarios and their mitigations.


@inproceedings{Timpner:CyCAR:2013,
author = {Timpner, Julian and Sch\"{u}rmann, Dominik and Wolf, Lars},
title = {{Secure Smartphone-based Registration and Key Deployment for
Vehicle-to-Cloud Communications}},
booktitle = {Proceedings of the ACM Workshop on Security, Privacy and
Dependability for Cyber Vehicles (CyCAR '13)},
month = nov,
doi = {10.1145/2517968.2517970},
isbn = {978-1-4503-2487-8},
year = {2013},
pages = {31--36},
address = {Berlin, Germany},
publisher = {ACM Press}
}