MODE HANDLING IN THE TIME-TRIGGERED ARCHITECTURE

Large real-time applications often impose stringent requirements on th e system architecture concerning the number of different operating con ditions under which they must operate. Modes and mode changes are a po werful concept to represent these operational phases within the system architecture. This paper focuses on the modes and the mode-change str ategy available in the time-triggered architecture. The time-triggered architecture is outlined, and the principle of modes and mode changes is introduced. The mode concept introduced in the TTA meets the requi rements imposed by different operating conditions of hard real-time sy stems. In particular, the conflict between consistency and speed is re solved by introducing two distinct types of mode changes. (C) 1998 Els evier Science Ltd. All rights reserved.