TTE高完整性和标准完整性配置下同步机制和容错能力对比分析

Comparative Analysis of Synchronization Mechanism and Fault Tolerance of TTE Network with High Integrity and Standard Integrity Configurations

针对高完整性与标准完整性配置的时间触发以太网具有不同同步机制和容错能力,对二者的同步机制和容错能力进行对比分析,在OMNet++平台上分别建立高完整性与标准完整性配置的时间触发以太网仿真模型,模拟不同故障下的时钟同步协议操作场景,对2种配置下的TTE同步机制的容错能力进行验证和分析。结果表明:高完整性配置容错能力更强,能够对抗压缩主控器和同步主控器的并发故障失效;面对多个不一致-遗漏故障时,高完整性配置的TTE能通过同步结团检测服务更快地进入重启动状态,因此相较于标准完整性配置反应更快。

Time-triggered Ethernet(TTE)has different synchronization mechanisms and fault tolerances for high integrity or standard integrity configurations.The synchronization mechanism and fault tolerance of the two configurations were compared and analyzed.The time-triggered Ethernet simulation model for high integrity and standard integrity configurations was established on the OMNet++platform to simulate the clock synchronization protocol operation scenario under different faults.The fault tolerance of the TTE synchronization mechanism was verified and analyzed.The results showed that the high integrity configuration was more fault tolerant and could counter the concurrent failure of the compression master and the synchronization master.In the face of multiple inconsistencies—missing failures,the TTE with a high-integrity configuration could enter into the restart state more quickly through the synchronous cluster detection service,thus reacting faster than the standard integrity configuration.