Affiliations: University Lille North of France, LAMIH FRE CNRS,
Valenciennes, France | INRIA Lille-Nord Europe, Villeneuve, France | IIS Department, University of Zaragoza, Zaragoza,
Spain
Note: [] Corresponding author: Thierry Delot, University Lille North of
France, UVHC/LAMIH FRE CNRS 3304, Le Mont Houy, 59313 Valenciennes, France.
Tel.: +33 3 27 51 19 56; Fax.: +33 3 27 51 19 40; E-mail:
[email protected]
Abstract: In a vehicular ad hoc network (VANET), cars can exchange information
by using short-range wireless communications. Along with the opportunities
offered by vehicular networks, a number of challenges also arise. In
particular, most works so far have focused on a push model, where potentially
useful data are pushed towards vehicles. The use of pull models, that would
allow users to send queries to a set of cars in order to find the desired
information, has not been studied in depth. The main challenge for pull models is the difficulty to route the
different results towards the query originator in a highly dynamic network
where the nodes move very quickly. To solve this issue, we propose GeoVanet, an
anonymous and non-intrusive geographic routing protocol which ensures that the
sender of a query can get a consistent answer. Our goal is to ensure that the
user will be able to retrieve the query results within a bounded time. To prove
the effectiveness of GeoVanet, an extensive experimental evaluation has been
performed, that proves the interest of the proposal for both rural and urban
areas. It shows that up to 80% of the available query results are delivered to
the user.
Keywords: vehicular networks, mobile computing, query result routing
