Conventional digital road maps are usually preinstalled in the navigation system onboard the vehicle and updated in relatively large time intervals, e.g. by distributing a CD-ROM with updated map data. Storing large digital road maps on board the vehicle imposes costs for licensing map data and computing resources. Furthermore, static maps cannot include dynamic information such as the road status. The instantaneous knowledge of road course, condition and traffic situation ahead of the vehicle is of major value for all kinds of driver assistance systems. In this paper, a method for self-generating an up-to-date road status map of the local area onboard a driving vehicle is presented. A commercial digital road map is not required, since vehicles generate the map based upon satellite based positioning (e.g. GPS) and vehicular ad hoc communication. The vehicles record Geo-Reference Points (GRP) for the driven track, which - besides their geographic location - also include dynamic information recorded by the vehicle, such as road condition, temperature and traffic status. A number of GRPs is combined to form a Geo-Reference List (GRL) which is broadcasted using vehicular ad hoc communication. By integrating received GRLs in the local data basis, a dynamic road status map of the local area can be created. The required market penetration is low (<5%) since only occasional communication with a vehicle on the opposite lane is required. In addition to the proposed scheme for self-generated maps, the paper presents first simulative and experimental results.
Self-generated road status maps based on vehicular ad hoc communication
Selbsterzeugende Straßenzustandsübersicht mit Hilfe der Fahrzeug-Ad-hoc-Kommunikation
2006
6 Seiten, 10 Bilder, 1 Tabelle, 5 Quellen
Aufsatz (Konferenz)
Englisch
Self-Generated Road Status Maps based on Vehicular Ad Hoc Communication
British Library Conference Proceedings | 2006
|