Cluster-Based Content Download and Forwarding Scheme for Highway VANETs

摘要

The recent advances in wireless communication technology enable high-speed vehicles to download data from roadside units (RSUs). However, the data download volume of individual vehicle is rather restricted due to high mobility and limited transmission range of vehicles, bringing users poor performance. To address this issue, we exploit the combina-tion of both clustering and carry-and-forward schemes in this paper. Our scheme coordinates the cooperation of multiple infrastructures, cluster formation in the same direction and data forwarding of reverse vehicles to facili-tate the target vehicle to download large-size content in dark areas. The process of data dis-semination and achievable data download vol-ume are then derived and analyzed theoretical-ly. Finally, we conduct extensive simulations to verify the performance of the proposed scheme. Results show significant benefits of the proposed scheme in terms of increasing data download volume and throughput.