汪清, 滕立平, 崔鑫, 王阔, 王娴, 李文健. 基于自适应双冗余的TTE调度方法及性能分析[J]. 工程科学学报, 2019, 41(3): 393-400. DOI: 10.13374/j.issn2095-9389.2019.03.013
引用本文: 汪清, 滕立平, 崔鑫, 王阔, 王娴, 李文健. 基于自适应双冗余的TTE调度方法及性能分析[J]. 工程科学学报, 2019, 41(3): 393-400. DOI: 10.13374/j.issn2095-9389.2019.03.013
WANG Qing, TENG Li-ping, CUI Xin, WANG Kuo, WANG Xian, LI Wen-jian. TTE scheduling method based on adaptive dual redundancy and performance analysis[J]. Chinese Journal of Engineering, 2019, 41(3): 393-400. DOI: 10.13374/j.issn2095-9389.2019.03.013
Citation: WANG Qing, TENG Li-ping, CUI Xin, WANG Kuo, WANG Xian, LI Wen-jian. TTE scheduling method based on adaptive dual redundancy and performance analysis[J]. Chinese Journal of Engineering, 2019, 41(3): 393-400. DOI: 10.13374/j.issn2095-9389.2019.03.013

基于自适应双冗余的TTE调度方法及性能分析

TTE scheduling method based on adaptive dual redundancy and performance analysis

  • 摘要: 针对TTE (time-triggered Ethernet, TTE) 网络对业务安全性与对业务实时性要求高的问题, 提出了一种自适应双冗余的网络结构, 设计冗余报文的时间标签, 自适应恢复传输, 并设计了TTE网络中的混合流量(TT (time-triggered) 流, RC (rateconstrained) 流, BE (best-effort) 流) 调度规划方法, 根据报文的重要性, 发送端自适应的对网络报文进行分类, 其中, TT信息双网备份传输, RC、BE信息在双网分散传输.此外, 基于确定性网络分析方法, 推导了自适应双冗余调度方法下RC流的闭式延迟界, 并仿真验证了在极限网络、确定网络以及排队论仿真模型下所提方法减小网络延迟的效果, 满足TTE网络在保障业务安全性的情况下对业务实时性的要求.

     

    Abstract: Time-triggered Ethernet (TTE) is a new high-speed, real-time and fault-tolerant communications technology that combines high real-time services and traditional best-effort services. TTE is highly valuable in the application of transmission technology in the aerospace field. To ensure the security requirements of important information, the TTE network adopts a dual redundant network structure. Traditional links execute switching operation at the occurrence of failure, and the physical link switching causes some overhead and delays. When using dual-network transmission, the protocol is complicated, and the discard windows discard redundant packets, which will also cause the increase of network delay. In this paper, an adaptive dual redundant network structure was proposed.This structure did not only meet the real-time performance requirements of the TTE network services, but also met the security requirements of the TTE network service. Time labels for redundant messages were designed in this structure, and using time labels could restore transmissions adaptively. A scheduling scheme of mixed traffic—time-triggered (TT) traffic, rate-constrained (RC) traffic, and best-effort (BE) traffic—in TTE network was designed. Based on the importance of the packet, the sender adaptively classified the network packet. Among the mixed traffic scheduling transmission, the TT traffic through the terminal redundancy was processed and backed ups, and it was transmitted in dual networks. RC and BE traffics were not important information; therefore, they did not need backup; they were transmitted dispersedly in dual networks. In addition, based on deterministic network analysis method, the closed delay bound of RC traffic under adaptive double redundant scheduling method was deduced. Furthermore, several simulation result under extreme network, determined network, and queuing theory simulation model show that the scheduling method based on adaptive dual redundancy can reduce the network delay. This design does not only satisfy the security requirements of the TTE network, but also meets the real-time requirements of the service.

     

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