| The approach of aggregating components into complex software system is maturing with the rapid development of component technology. But more job focus on the aspect of component development and reuse, research in the aspect of the system reliability more fewness. How to analyze software reliability from system architecture and components'reliabilities should be answered.Generally, the estimate method of software reliability has three kinds: section-based model, state-based model and path-based model. The section-based model is process according as the information which user use the software. The state-based model is suppose the transform of software has the character of Markov, but this model need assure component has independence is difficult. The path-based model generally estimate software reliability after software implemented.In this paper correlative conceptions and technology about component and component-based software system of are introduced and analyzed, then a survey of software reliability was carried on. On this basis, according as the theory of Petri, present at the SAPN model of Petri based architecture, and using the SAPN modeling to the component-based architecture.This paper put forward the method of CDGsBSAPN through analyzing CDGs model and SAPN and using it. This model can estimate the reliability of software system in prophase phase of software development and software running phase. On this basis, for improving the reliability of component software system through analyzing the key component in system and using the technology of fault-tolerate. |
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