Rethinking the overhead of geo-localization information for vehicular communications

Haerri, Jérôme;Filali, Fethi;Bonnet, Christian
Research report RR-07-194

Geo-localization informations is a key component for providing locationbased services for Intelligent Transportation Systems (ITS). Mostly obtained by GPS devices and transmitted by Wireless Vehicular Communications, geo-localization in ITS represents a promising approach to reach objectives such as an increased road safety, transport efficiency, or on-the-road services. Despite its popularity, the issue of the overhead generated by the transmission of geo-localization data has not been addressed the ITS community. In this paper, we first discuss the format of the information provided by GPS devices and propose a flexible message structure for exchanging geolocalization data. Then, we illustrate the significant overhead generated by the transmission of such information and propose a compression method which achieves up to 70% overhead reduction without loss of precision. We finally test our method on the OLSR routing protocol.


Type:
Rapport
Date:
2007-04-22
Department:
Systèmes de Communication
Eurecom Ref:
2239
Copyright:
© EURECOM. Personal use of this material is permitted. The definitive version of this paper was published in Research report RR-07-194 and is available at :

PERMALINK : https://www.eurecom.fr/publication/2239