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Time-Triggered Architecture for Reliable Distributed Real-Time Systems

This paper presents a comprehensive overview of Time-Triggered Architecture (TTA) aimed at enhancing the reliability of distributed real-time systems. It discusses key concepts such as Fault Containment Regions (FTR), deterministic systems, and the role of Ethernet standards in achieving predictable and deterministic communication. Furthermore, it covers essential topics like fault-tolerant global time, strong fault isolation, consistent diagnosis, and scalable channel designs. The document also details various message formats and categories essential for efficient time-triggered communication and scheduling mechanisms.

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Time-Triggered Architecture for Reliable Distributed Real-Time Systems

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  1. The Time Triggered Architecture ITV Distributed Real-Time Systems Anders P. Ravn Aalborg University September 2006

  2. Requirements • Fault Containment Regions (FTR) • Deterministic System • Ethernet Standard

  3. Predictable and Deterministic • Fault-Tolerant Global Time • Strong Fault Isolation • Consistent Diagnosis • Scalable

  4. Det. Channel • treceive  tsend + (dmin,dmax) • Temporal receive consistency • Simultaneous send consistency Required for transparent N-modular consistency

  5. Event versus State Messages

  6. Time Granularity

  7. Configurations

  8. Package Format

  9. Message Categories • ET message • Free-Form TT message • TT startup message • TT synchronization message • Unprotected TT message (UTTM) • Protected TT message (PTTM)

  10. TT Scheduler • Computes conflict free schedule! • ET messages are ignored

  11. Remarks • F-T is established by Guardians • Only bus design that really covers F-T

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