Development Of Components To Support The Credibility Of Real-time Services

At present, with the combination of the distributed technology and object-oriented technology, there are a large number of middleware-based distributed object model. For example, OMG organizations of CORBA,Microsoft company of DCOM,Sun's RMI. But, some of the stringent performance requirements (Performance-critical) of the DRES (Distributed Real-time Embedded System) (such as: aviation electronics systems, carrier-based electronic systems, etc.)require that the realization of function and capability. On the other hand, real-time middleware technologies (such as TAO) did not provide effective dynamic QoS (Quality of Service) to ensure that the function, so, how to load the dynamic QoS adaptive mechanism into the real-time middleware framework is deemed to one of the problem in component technology.In view of credible service in DRES, the thesis proposes that a new kind of model—QUOCCM. QUOCCM supports a creditability service for an application system which runns in a dynamic environment. In the article, we simulate a flight control system, at the same time, we have proved the feasible and flexible capability of the model QUOCCM by the flight control system. The characteristic of this dissertation are as follows:(1)Studied how to use the reusable technology to achieve the system's QoS strategy.(2)Proposing a new component model, which separates the application system's quality of service from it's function realization.(3)Studied the formal description for automated generation of the QoS strategy.(4)Studied how to make quality componet into automated assembly.In this thesis, to meet the demanding DRES in quality, we base on CIAO component model's QoS framework, proposing a new model --- QUOCCM model. Passing experiments, we have proved QUOCCM model to be able to carry out dynamic adaptive QoS mechanism to ensure its'implementation that the dynamic uncertain real-time mission.