Because the distributed data of some emerging VANET applications is increasing,it is difficult for vehicles to receive the complete data when they pass through one RSU,which leads to low service completion rate and long delay.Aiming at this problem,a cooperative V2V-aided data distribution scheme based on fountain code information difference clustering was pro-posed.The data encoded by fountain code were broadcast to vehicles by RSUs.The vehicles predicted the vehicle speeds by XGBoots to calculate the V2V link lifetime and the gravity model was built based on link reliability and the difference of fountain code information of vehicles to cluster.The encoded packets were shared through cooperative V2V transmission in the clusters,which reduced the delay on the premise of ensuring the completion rate.Simulation results show that compared with the other scheme ECDS,the average delay of the proposed scheme is reduced by 38％for different sizes of data without reducing comple-tion rate.
关键词
数据分发/车联网/分簇/车辆间协作传输/喷泉码/引力模型/移动预测
Key words
data distribution/vehicular networks/cluster/cooperative V2V transmission/fountain code/gravity model/mobili-ty prediction
维普
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