Schedulability analysis of AR-TP, a Ravenscar compliant communication protocol for high-integrity distributed systems

A new token-passing algorithm called AR-TP for avoiding the non-determinism of some networking technologies is presented. This protocol allows the schedulability analysis of the network, enabling the use of standard Ethernet hardware for hard real-time behavior while adding congestion management. It is specially designed for high-integrity distributed hard real-time systems, being fully compliant with the Ravenscar profile.