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EETE OCTOBER 2012

DESIGN & PRODUCTS TElEmaTICS & lOGISTICS Car sharing as a smartphone app - the key to future urban traffic By Christoph Hammerschmidt The demand for flexible mobility in urban areas through car finds and identifies cars to share across a given city area. Users sharing models is what automotive electronics expert company can then select a vehicle and make a reservation. Within the wants to address with a kind of “universal key” for all kind of Autopartage@Toulouse project, ten vehicles are available to be shared vehicles and geographies. The key is implemented as a shared among users. smartphone app which communicates with the vehicle through The difference between existing systems and the Continental Near Field Communications (NFC). The new key is much more approach is that most car sharing fleets depend on intelligence versatile and cost effective than existing systems, the company associated to the devices installed in the vehicle. In contrast, claims. Continental makes use of the smartphone’s processing power; The centrepiece of the car sharing key is a digital crypto- the cars only need to be fitted with an NFC reader. This ap- graphic key which is exchanged between the smartphone and proach significantly reduces costs, the designers argue - with the vehicle through the app. a digital key stored in the Before a user can enter a smartphone, the cost car, Continental sends an level is just one tenth. In unforgeable data record to addition, the smartphone- the handset. This record will based solution is more be stored on the SIM card flexible since it can be and represents the right to used independently of the access a specific vehicle. car maker or model and When the user takes over within a given fleet, models the car, the data includ- can be varied more easily. ing authentication, vehicle What’s more, the system identification and vehicle is also more secure. It technical status has to employs the same security be transferred across a standard as does the NFC distance of a few centime- payment system imple- tres to the vehicle. For this mented in that smartphone purpose, an NFC reader - which means that it is installed inside the car meets stringent require- - for instance behind the windscreen near the door. Another ments from banks and credit card institutions. The data ex- NFC reader inside the vehicle verifies the digital key before the change is performed between the smartphone and the vehicle, engine can be started. not through a service centre. And for the system it is easier to The technology is currently tested in a fleet trial in Toulouse use since no passwords or PIN codes are required. (France). “In the first place, using the mobile phone as a car This also makes the system scalable; additional functions key gives us flexibility “, said Caroline Lapelerie who frequently can be integrated easily. User preferences such as seat settings makes use of car sharing during her work for Toulouse’s munici- or preferred radio stations can be stored on the smartphone pal administration. which can also be used as an electronic ticket for associated The app is central in the process of car sharing. This program urban traffic concepts, Continental explains. dSPaCE and TaSS link tools for developing cognitive driver assistance systems The Automotive Simulation Models (ASM) from German automotive simulation tool vendor dSPACE can now work together with PreScan, a software from TASS for sensor and environment simulation. This tool combination enables developers to optimize the efficiency of intelligent assistance systems at an early stage with highly precise sensor simula- tion and flexible, reproducible traffic simulation. Developers use the ASM to simulate the dynamic behavior of vehicles when developing and testing vehicle dynamics ECUs. PreS- can provides the simulation of vehicle sensors in complex traffic scenarios involving several vehicles. dSpace www.dspace.com 32 Electronic Engineering Times Europe October 2012 www.electronics-eetimes.com


EETE OCTOBER 2012
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