Enhancing Quality

Time-triggered systems are structured into many subsystems, all of them clearly linked. Therefore, these subsystems are practically autonomous and can be developed and tested individually. Design changes that affect the interface will be immediately taken into consideration by all other subsystems. This avoids problems during system integration and enhances quality.

The advantage TTP provides over traditional event-triggered protocols is that all information on the bus is available to both communication channels simultaneously, eliminating the need for channel transfers when one channel's data is unavailable.

Reducing Costs

This integrated architecture allows moving and distributing functions across the network of subsystems. This lessens the number of sensors and electronic control units in a system, which reduces costs at equal or even higher safety and performance.

In addition, the Time-Triggered Protocol TTP provides hardware functions which guarantee safe communication. This reduces the complexity and verification and certification cost of the application software. For example, certification in the aerospace industry accounts for about 70% of a safety-relevant system's costs.

Providing Safety

Safety has always been a top priority for TTP. Leading universities and research centers, such as SRI International, University of Ulm, University of York, University of Paris, and Vienna University of Technology, accomplished the formal verification of TTP. Real tests with millions of faults, heavy ion radiation experiments, and experiments with electromagnetic interferences were also carried out successfully. Due to this rigorous safety approach, TTP is widely accepted among companies from the aerospace, off-highway vehicles, railway, and industrial control industry. After more than 20 years of R&D work, TTP is now used in commercial applications.

For more information on TTP please contact us directly at info@ttagroup.org. The TTP specification can be requested at Specification.