Abstract: Extending object-oriented programming(OOP) to distributed real-time computing (DRTC) environment has been and is the focus of researches around the world in recent years. In traditional object-oriented computing mechanisms, little computing semantics support is provided for distributed real-time computing applications. It is argued in this paper that the key to solve the problem is to integrate the distributed real-time computing semantics into the object-oriented computing mechanisms. Based on the above policy, this paper presents an object-oriented distributed real-time computing model. In support of the computing model, several real-lime remote operation invocation (RT-ROP1) mechanisms are designed, namely, synchronous RT-ROPI mechanism, asynchronous RT-RORT mechanism and replicated real-lime operation invocation (R-RTOPI) mechanism All these RT-ROPl mechanisms are implemented in an experimental distributed real-lime computing system -EDRTCS.

Key words: real-time remote operation mvocation, replicated distributed real-time compuninggsplit deadine protocol, objet-oriented programming