Global Automotive Telematic Standart (GATS) is the new traffic telematics standart introduced by Tegaron Telematics GmbH and Mannesmann Autocom GmbH and is now brought to the CEN working group. The traffic telematic services of GATS require different positioning accuracies, which can be performed with a range of known positioning techniques as well as new techniques, which would have to be developed to the mass marked. Traffic Information Services and General Information Services are easily operated with basic GSM-location-techniques or low-cost satellite based positioning. Emergency Call and Roadside Assistence actually run with onboard GPS-techniques (Global Positioning Syszem) in combination with an off-line map-matching-process in the telematic service center. Reverse dGPS-techniques (differential GPS) are recently evaluated to optimize the Map-Matching. Nowadays Navigation Services in urban areas require either onboard digital road maps or sophisticated use of online dGPS. As an alternative a method is under development, in which detailed information of significant junctions are transmitted to the onboard unit. This information is applied to adjust the actual onboard positioning off-set and is supposed to enable a turn-by-turn-like navigation with a low-cost onboard unit.
Suitability of positioning systems for traffic telematic applications based on GATS
1998
33 Seiten, 25 Bilder
Conference paper
English
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