基于时间敏感软件定义网络的工业互联网时延优化方案

doi:10.12305/j.issn.1001-506X.2023.06.28

Abstract

Abstract:

Aiming to solve the problems of network congestion and time delay increasement caused by the simultaneous transmission of data traffic with different priorities in large-scale industrial communication networks, a network time delay optimization scheme is proposed based on the time sensitive software defined network (TSSDN) framework. In the data-link layer, the enhanced-time awareness shaper (E-TAS) algorithm of classified shaping scheduling is adopted for the data traffic with different priorities in the industrial network to shorten the network queuing time delay. The synchronous real-time data with the highest priority is scheduled by a flow reservation, and the asynchronous real-time data with the second priority is scheduled by a frame preemption, and the low priority non real-time data is fairly scheduled according to its scheduling weight. At the same time, the Dijkstra algorithm based on time delay is used in the network layer to shorten the propagation time delay of network data. The simulation results validate that the proposed schedule can effectively meet the requirement of time delay for data traffic of different priorities and the optimization of the performance for total network time delay.

Key words: industrial internet, network time delay, time sensitive network (TSN), software defined network (SDN), shortest path routing

CLC Number:

TN915

Lei WU, Ju LIU, Zhichao GAO, Zheng DONG, Hongji XU. Time delay optimization scheme of industrial internet based on time sensitive software defined network[J]. Systems Engineering and Electronics, 2023, 45(6): 1836-1846.

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参数名称	参数值
仿真时间/s	100
交换机链路速率/Mbps	0.05
OVS端口速率/Mbps	0.2
主链路时延区间/μs	[5~10]
子链路时延区间/μs	[10~20]
节点缓存分组数/个	120
优先级7数据帧长/byte	68
优先级6数据帧长/byte	1 022
优先级0~5数据帧长/byte	1 374
同步调度周期/ms	1.4

算法	最小时延	最大时延	平均时延	平均时延抖动
基于时延的Dijkstra算法	0.051	12.000	0.218	0.068
最小生成树Prim算法	0.045	1 054.000	36.526	139.213

Time delay optimization scheme of industrial internet based on time sensitive software defined network

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