Overall Objectives
Research Program
Highlights of the Year
New Software and Platforms
New Results
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Section: New Results

Embedded Systems Design

Loosely Time-Triggered Architectures: Improvements and Comparisons

Participant : Albert Benveniste.

Loosely Time-Triggered Architectures (LTTAs) are a proposal for constructing distributed embedded control systems. They build on the quasi-periodic architecture, where computing units execute 'almost periodically', by adding a thin layer of middleware that facilitates the implementation of synchronous applications. InĀ [7] , we have shown how the deployment of a synchronous application on a quasi-periodic architecture can be modeled using a synchronous formalism. Then we have detailed two protocols, Back-Pressure LTTA, reminiscent of elastic circuits, and Time-Based LTTA, based on waiting. Compared to previous work, we presented controller models that can be compiled for execution and a simplified version of the Time-Based protocol. We also compared the LTTA approach with architectures based on clock synchronization.