The design of an open real-time system using CORBA

While CORBA provides an infrastructure which allows objects to communicate, independent of the specific techniques, languages, and platforms used to implement the objects, it is not yet suited for real-time applications since CORBA lacks essential quality-of-service (QoS) features. Current work on real-time CORBA includes an off-line scheduled, hard, real-time system based on rate-monotonic scheduling and an on-line scheduled, best-effort, real-time system based on the earliest-deadline-first algorithm. The former provides QoS guarantees at the expense of run-time scheduling flexibility while the latter provides the complement. We propose an approach which provides the advantages of both, that is, QoS guarantees and run-time scheduling flexibility