Performance Analysis of Context-Aware Composite Device Services

Recent rich services provided by mobile devices take a form of composite services consisting of several constituent atomic services and they are gaining popularity due to technological advances and wireless network infrastructures. To make the best use of these technological benefits, the services given by the device need to be developed and provided with consideration of user context that contains information about environments. We regard these pieces of information as data segments that can trigger a service when they are gathered enough to infer a certain degree of the user context. In this regard, we investigate a context-aware composite service provision process and present an analytical tool for assessing the performance of the service provision process by means of a mathematical model. Based on the results from extensive experimental simulations, it is observed that the performance assessment based on the proposed mean value analysis (MVA) model effectively confirms the characteristics of the composite service systems.