A Connectivity-Aware Caching Algorithm for Vehicular Content Centric Networks with Cache-Enabled Vehicles

摘要

Recently, cache-enabled vehicles have been introduced to improve the efficiency of content delivery in vehicular content centric networks (VCCNs). Content requests can be satisfied by vehicular caches without causing backhaul cost. However, it takes caching cost to store contents in participating vehicles. Moreover, the vehicle-to-vehicle (V2V) content delivery highly depends on the inter-vehicle connectivity. In this paper, a connectivity-aware content caching algorithm is proposed to help cache-enabled vehicles manage theirs caches. According to the content popularity distribution, connectivity, and current caching status, cache-enabled vehicles store some chunks of contents to maximize the total caching utility. Simulation results prove that the proposed connectivity-aware caching algorithm is superior to the existing AlwaysCaching algorithm and probabilistic caching (ProCaching) algorithm in the total caching utility.