In this paper, we address the popular content distribution (PCD) problem in a highway
scenario, in which popular files are distributed to a group of on-board units (OBUs) driving
through a single roadside unit (RSU). Due to the high speeds, the OBUs may not finish
downloading a large file within the limited time for vehicle-to-roadside (V2R) communication
and a peer-to-peer (P2P) network consisting of OBUs out of the RSU coverage can be
constructed for completing the file delivery process. However, due to fast and unpredictable …

Driven by both safety concerns and commercial interests, vehicular ad hoc networks
(VANETs) have recently received considerable attentions. In this paper, we address popular
content distribution (PCD) in VANETs, in which one large popular file is downloaded from a
stationary roadside unit (RSU), by a group of on-board units (OBUs) driving through an area
of interest (AoI) along a highway. Due to high speeds of vehicles and deep fadings of
vehicle-to-roadside (V2R) channels, some of the vehicles may not finish downloading the …