Abstract
In this paper we propose an alternative approach for dealing with distributed real-time applications in CORBA environments. Our approach, called deterministic CORBA ORB (DORB), provides the basis for implementing distributed real-time applications on LANs (Local Area Networks) and the Internet. DORB uses a deterministic mechanism for the refreshment of client stubs. It is especially adapted for handling periodic tasks. DORB is based on a time-bounded atomic multicast protocol and a statistical observer component for making estimations on the transmission delays of the network. Its most important feature is to guarantee the determinism, in a bounded-time, of the entire end-to-end path of a real-time client-server interaction (transmission delays and server processing time).
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