Bus Scheduling for TDL Components

This paper describes a solution for bus scheduling of distributed multi-mode TDL (Timing Definition Language) components. The TDL component model is based on the concept of Logical Execution Time (LET), which abstracts from physical execution time and thereby from both the execution platform and the communication topology. The TDL component model allows the decomposition of hard real-time applications into modules (= components) that are executed in parallel. A TDL module runs in one particular mode at a time and may switch to another mode independently from other modules. This is in contrast with global modes as introduced by other available hard real-time systems and introduces new challenges for bus scheduling.