时间敏感网络路径动态冗余策略研究  

Research on path dynamic redundancy strategy in Time Sensitive Network

作　　者：胡峰 刘泽响[1] 徐丹妮[1] HU Feng;LIU Zexiang;XU Danni(Xi′an Institute of microelectronics technology,Xi′an 710054,China)

机构地区：[1]西安微电子技术研究所,陕西西安710054

出　　处：《微电子学与计算机》2022年第11期54-61,共8页Microelectronics & Computer

摘　　要：围绕时间敏感网络的高可靠性需求,针对现有冗余技术不能为不连续的多个单节点故障提供高可靠性保证的问题,开展了时间敏感网络路径动态冗余技术研究,设计了一种基于IEEE 802.1CB协议和IEEE 802.1Qcc协议的路径动态冗余策略.在网络存在两条不相交冗余路径进行无缝传输的基础上,首先用序列恢复功能中改进的动态可变长滑动窗口VariableVectoryRecovery算法进行帧的复制、删除和节点故障检测,并上报告给集中式网络配置管理节点;其次提出了多目标优化BackupReroute模型,从时延和带宽两方面对修复路径做优化,并用遗传算法求解,在保证网络可靠性的同时尽量降低网络负载,动态重组冗余系统.通过理论分析证明了该路径动态冗余策略可以为不连续多节点故障提供高可靠性保证;并将BackupReroute模型与其他选路算法对比,得出其求出的路径整体性能更优;最后在OMNeT++上将VariableVectoryRecovery算法进行仿真实验,结果证明其可以有效降低丢包率.Focusing on the high reliability requirements of Time Sensitive Networks, the research on path dynamic redundancy technology is carried out to address the problem that the existing redundancy technology cannot provide high reliability guarantee for discontinuous multiple single node failures.Based on the existence of two disjoint redundant paths in the network for seamless transmission, a path dynamic redundancystrategyis designed on the basis of IEEE 802.1 CB protocol and IEEE 802.1 Qcc protocol.Firstly, the dynamic variable length sliding window VariableVectoryRecovery algorithm is improved in the sequence recovery function for frame replication, node failure detection, and reported to the centralized network configuration management node.Secondly, a multi-objective optimized BackupReroute model is proposed to repair thepath in terms of delay and bandwidth, and solved by genetic algorithm to ensure network reliability while minimizing network load and dynamically reorganizing the redundant system. The theoretical analysis proves that this path dynamic redundancy strategy can provide high reliability guarantee for discontinuous multi-node failures.Comparing with other routing algorithms, the BackupReroute model overall performance is better.Finally, the simulation experiment of VariableVectoryRecovery algorithm is conducted on OMNeT++, and the results prove that it can effectively reduce the packet loss rate.

关 键 词：TSN IEEE 802.1CB IEEE 802.1Qcc 遗传算法 多目标优化 动态冗余 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]