A Cooperative Caching Algorithm for Cluster-Based Vehicular Content Networks with Vehicular Caches

摘要

In this paper, a cooperative caching algorithm is proposed for cluster-based vehicular content networks (VCNs) with vehicular caches. Different from the existing non-cooperative algorithm, the proposed algorithm is designed based on the globe caching status of vehicular clusters and the caching capacity constraints of vehicles. A novel average accumulated network cost metric is defined, i.e., a weighted sum of average accumulated normalized backhaul cost and average accumulated normalized vehicular caching cost. Given the mobility model and content distribution model of a vehicular cluster, the average accumulated network cost of the proposed algorithm can be obtained. Simulation results show that the proposed algorithm is more effective to reduce the average accumulated network cost compared with the existing algorithm under different scenarios.