车载异构网络中基于前向时延的多径传输路径调度优化  

Optimization of multipath transmission path scheduling based on forward delay in vehicular heterogeneous network

作　　者：赵海涛[1,2] 陈跃 张唐伟 朱奇星 朱洪波[1,2] ZHAO Haitao;CHEN Yue;ZHANG Tangwei;ZHU Qixing;ZHU Hongbo(Ministry of Education Ubiquitous Network Health Service System Engineering Research Center,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;College of Communication and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China)

机构地区：[1]南京邮电大学教育部泛在网络健康服务系统工程研究中心,江苏南京210003 [2]南京邮电大学通信与信息工程学院,江苏南京210003

出　　处：《通信学报》2020年第11期99-107,共9页Journal on Communications

基　　金：国家自然科学基金资助项目(No.61771252);江苏省自然科学基金资助项目(No.BK20171444);江苏省高校自然科学研究重大基金资助项目(No.TJ218011)。

摘　　要：为了解决多径传输中数据分组在接收端乱序从而导致传输性能大大降低问题,提出了车载异构网络中基于前向时延的多径传输路径调度优化算法。所提算法的主要思想是,根据发送方估计的前向时延和吞吐量差异,通过并发路径调度数据分组。在NS-3上进行了仿真实验,仿真结果表明,所提算法在重新排序缓冲区占用密度(RBD)和吞吐量的表现都优于其他算法,接收端的数据分组乱序问题明显降低,系统的总吞吐量和网络利用率得到了提高。In order to solve the problem that the data packets were out of order at the receiving end in the multipath transmission,which greatly reduced the transmission performance,an optimization algorithm was proposed for multipath transmission path scheduling based on forward delay in the vehicle heterogeneous network.The main idea of the proposed algorithm was to schedule data packets through a concurrent path according to the forward delay and throughput difference estimated by the sender.A simulation experiment was carried out on NS-3.The simulation results show that compared with the previous algorithm,the proposed algorithm has better performance than other algorithms in reorder-buffer-occupancy density(RBD)and throughput.The problem of out-of-order data packets at the receiving end is significantly reduced,and the total system throughput and network utilization have been improved.

关 键 词：车载异构网络 多径传输 路径优化 前向时延 无序分组 

分 类 号：TN915.04[电子电信—通信与信息系统]