An analysis framework for network-code programs
EMSOFT '06 Proceedings of the 6th ACM & IEEE International conference on Embedded software
A dynamic scheduling approach to designing flexible safety-critical systems
EMSOFT '07 Proceedings of the 7th ACM & IEEE international conference on Embedded software
State-based scheduling with tree schedules: analysis and evaluation
Real-Time Systems
DTS: Dynamic TDMA scheduling for Networked Control Systems
Journal of Systems Architecture: the EUROMICRO Journal
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Distributed hard real-time systems require guaranteed communication. One common approach is to restrict network access by enforcing a time-division multiple access (TDMA) schedule.The typical data representation of offlinegenerated TDMA schedules is table-like structures. This representation, however, does not permit applications with dynamic communication demands, because the table-like structure prevents on-the-fly changes during execution. A common approach for applications with dynamic communication behavior is dynamic TDMA schedules. However, such schedules are hard to verify, because they are usually implemented in a programming language, which does not support verification. Network code is a behavioral model for specifying realtime communication schedules. It allows modeling arbitrary time-triggered communication schedules with on-thefly choices, and it is also apt for formal verification. In this work, we present network code and show how we can use a model checker to verify safety properties such as collision-free communication, schedulability, and guaranteed message reception. We also discuss its implementation in RTLinux and provide performance measurements.