Advances in Real-Time Systems
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This paper presents our COREMO (COrba Real-time Extension MOdel) model [2]. It aims to conciliate real-time with openness so that CORBA compliant applications will benefit from real-time concepts and reciprocally real-time application developers will take advantage of the CORBA concepts and facilities. We will introduce a real-time extension that will allow application developers to specify end-to-end temporal characteristics for their requests. COREMO objectives are to maximize the temporal previsibility of CORBA compliant applications and to improve their performance. Our model includes the definition of real-time policy behavior for servers so that the clients gain previsibility and time. We also recommend an associated framework for the development of distributed soft real-time components and for their utilization in the context of open systems. The implementation we did of the model and the experimentations gave convincing results concerning the feasibility and the utility of such an extension. We will end this paper with a presentation of our planned research activities for the future. Those activities concern real-time and synchronization issues and target to improve the quality of service from the client's point of view.