Um Sistema para Monitoramento de Metadados para Aplicações Ubíquas

• Gustavo Alves UFRN
• Thais Batista UFRN

Abstract

Ubiquitous applications use several service and context providers for performing their tasks and work in a dynamic and heterogeneous environment. In such scenario, it is essential to monitor metadata related to Quality of Service (QoS) and Quality of Context (QoC) in order to ensure that the application is using services and context information with proper QoS and QoC levels. This work presents QoMonitor, a monitoring system that assesses and monitors QoS and QoC metadata, works in both synchronous and asynchronous modes, and adopts an ontology for representing concepts in an unambiguous way. QoMonitor was integrated with OpenCOPI, a platform that facilitates the development and execution of ubiquitous applications. This work also illustrates the use of the monitor in an ubiquitous application that monitors oil wells. The results of the performance evaluation have shown that the use of the QoMonitor by OpenCOPI has not generated a considerable impact and has enabled OpenCOPI to deal with real QoS and QoC values.

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