车载异构网络中基于前向时延的多径传输路径调度优化

doi:10.11959/j.issn.1000-436x.2020162

Journal on Communications ›› 2020, Vol. 41 ›› Issue (11): 99-107.doi: 10.11959/j.issn.1000-436x.2020162

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

Haitao ZHAO^1,²,Yue CHEN^1,²,Tangwei ZHANG^1,²,Qixing ZHU^1,²,Hongbo ZHU^1,²

¹ Ministry of Education Ubiquitous Network Health Service System Engineering Research Center,Nanjing University of Posts and Telecommunications,Nanjing 210003,China
² College of Communication and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China

Revised:2020-06-14 Online:2020-11-25 Published:2020-12-19
Supported by:
The National Natural Science Foundation of China(61771252);The Natural Science Foundation of Jiangsu Province(BK20171444);The Natural Science Fundation of Jiangsu Higher Education Insititutions of China(TJ218011)

Abstract

Abstract:

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.

Key words: vehicular heterogeneous network, multipath transmission, path optimization, forward delay, unordered grouping

CLC Number:

TN915.04

Haitao ZHAO,Yue CHEN,Tangwei ZHANG,Qixing ZHU,Hongbo ZHU. Optimization of multipath transmission path scheduling based on forward delay in vehicular heterogeneous network[J]. Journal on Communications, 2020, 41(11): 99-107.

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References 15

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参数	数值
算法模拟次数/次	20
实验模拟时间/s	50
数据分组大小/B	1 000
MSS/B	934
ACK选项	可变ACK
队列管理	黑色
接收器缓冲区	不设置
带宽	2倍瓶颈链路带宽
时延/ ms	1
最短前向时延路径更新间隔	每次往返时间

条件	路径A	路径B
条件1	BW=5 Mbit/s,delay=10 ms	BW=5 Mbit/s,delay=10 ms
条件2	BW=5 Mbit/s,delay=10 ms	BW=5 Mbit/s,delay=25 ms
条件3	BW=4 Mbit/s,delay=10 ms	BW=8 Mbit/s,delay=30 ms

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

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