Caching-assisted access for vehicular resources

Abstract

Smart vehicles are considered major providers of ubiquitous information services. In this paper, we propose a solution for expedited and cost-effective access to vehicular public sensing services. The proposed caching-assisted data delivery (CADD) scheme applies caching on the delivery path of the collected data. Cached information can be used for later interests without having to request similar data from vehicles. CADD relies on the deployment of a “light-weight” road caching spot (RCS) at intersections, and on vehicles for communication to/from RCSs. CADD involves a novel caching mechanism that utilizes real-time information for selecting the caching RCSs while considering popularity in cache replacement. A data chunk to be replaced may be forwarded to another less-loaded RCS. CADD considers vehicles' headings to direct communication towards the destination, which reduces access delay. Performance evaluation of CADD shows significant improvements in the access cost and delay compared to a scheme that does not deploy RCSs.