工程科学学报，第41卷，第3期：393-400,2019年3月 Chinese Journal of Engineering,Vol.41,No.3:393-400,March 2019 DOI:10.13374/j.issn2095-9389.2019.03.013:http://journals.ustb.edu.cn 基于自适应双冗余的TTE调度方法及性能分析 汪 清”，滕立平”，崔鑫”，王阔”，王娴四，李文健) 1)天津大学电气自动化与信息工程学院，天津3000722)天津津航计算技术研究所，天津300308 ☒通倍作者，E-mail:2017234342@ju.edu.cm 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(rate- constrained)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信总双 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. 关键词自适应双冗余：时间触发以太网：调度规划：RC延迟：性能界 分类号V247.2:TP393.0 TTE scheduling method based on adaptive dual redundancy and performance analysis WANG Qing,TENG Li-ping),CUI Xin),WANG Kuo),WANG Xian,LI Wenjian2) 1)School of Electrical and Information Engineering,Tianjin University,Tianjin 300072,China 2)Tianjin Jinhang Computing Technology Research Institute,Tianjin 300308,China Corresponding author,E-mail:2017234342@tju.edu.cn ABSTRACT Time-triggered Ethernet (TTE)is a new high-speed,real-time and fault-tolerant communications technology that com- bines 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 over- head and delays.When using dual-network transmission,the protocol is complicated,and the discard windows discard redundant pack- ets,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 require- ments of the TTE network service.Time labels for redundant messages were designed in this structure,and using time labels could re- store 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 un- der extreme network,determined network,and queuing theory simulation model show that the scheduling method based on adaptive du- al 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. 收稿日期：201801-26 基金项目：国家高技术研究发展计划资助项目(2015AA01A706):民用航天预研基金资助项目([2016]1299)工程科学学报，第 41 卷，第 3 期: 393--400，2019 年 3 月 Chinese Journal of Engineering，Vol． 41，No． 3: 393--400，March 2019 DOI: 10． 13374 /j． issn2095--9389． 2019． 03． 013; http: / /journals． ustb． edu． cn 基于自适应双冗余的 TTE 调度方法及性能分析 汪 清1) ，滕立平1) ，崔 鑫1) ，王 阔1) ，王 娴1) ，李文健2) 1) 天津大学电气自动化与信息工程学院，天津 300072 2) 天津津航计算技术研究所，天津 300308 通信作者，E-mail: 2017234342@ tju． edu． cn 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( rate￾constrained) 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． 关键词 自适应双冗余; 时间触发以太网; 调度规划; ＲC 延迟; 性能界 分类号 V247. 2; TP393. 0 收稿日期: 2018--01--26 基金项目: 国家高技术研究发展计划资助项目( 2015AA01A706) ; 民用航天预研基金资助项目( ［2016］1299) TTE scheduling method based on adaptive dual redundancy and performance analysis WANG Qing1) ，TENG Li-ping1) ，CUI Xin1) ，WANG Kuo1) ，WANG Xian1)  ，LI Wen-jian2) 1) School of Electrical and Information Engineering，Tianjin University，Tianjin 300072，China 2) Tianjin Jinhang Computing Technology Ｒesearch Institute，Tianjin 300308，China Corresponding author，E-mail: 2017234342@ tju． edu． cn ABSTＲACT Time-triggered Ethernet ( TTE) is a new high-speed，real-time and fault-tolerant communications technology that com￾bines 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 over￾head and delays． When using dual-network transmission，the protocol is complicated，and the discard windows discard redundant pack￾ets，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 require￾ments of the TTE network service． Time labels for redundant messages were designed in this structure，and using time labels could re￾store 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 un￾der extreme network，determined network，and queuing theory simulation model show that the scheduling method based on adaptive du￾al 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．