Cache invalidation for location dependent and independent data in IVANETS

Abstract

Internet-based vehicular ad hoc network (IVANET) is an emerging technique that combines a wired Internet and a vehicular ad hoc network (VANET) through roadside infrastructures for providing universal information and service accessibility to the vehicles. A key optimization technique in IVANETs is to cache frequently accessed data items in a local storage of vehicles. Since vehicles are not critically limited by the storage space, it is a less of a problem which data items to cache. Rather, a critical design issue is how to invalidate them when data items are updated. This is particularly a concern due to vehicles' high-speed mobility. In this paper we proposed a scheme in which we classify data in two categories and use two different Invalidation Reports (IRs) to invalidate them. © 2011 Springer-Verlag.