Yong-Woong Lee, Se-Han Kim, Kyo-Hun Son, In-Hwan Lee, Chang-Sun Shin, Journal of Internet Computing and Services, Vol. 12, No. 3, pp. 1-16, Jun. 2011
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Keywords: USN Middleware, context-awareness, Failure Diagnosis, USN

Abstract

In this paper, we proposed the Failure-Diagnostic Context-awareness Middleware (FDCM) for improving the reliability in the USN application service. The middleware diagnoses the failure occurred in sensors or facilities in the indoor USN application system. The new middleware suggested in this paper consists of DataManagement module, ContextProvider module, Contextlnterpreter module, ServiceProvider module and DataStorage module. By analysing the data obtained by the interaction between modules through the diagnostic algorithm, the FDCM determines the malfunction of sensors and equipment devices. Then we verified the performance of middleware by using simulation. As a result, the FDCM showed the high performance in the large systems that many of the sensors and devices are installed.

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