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Master Thesis Defense: Rifat Jafrin
Speaker: Rifat Jafrin
Supervisor: Dr. R. Glitho
Examining Committee: Drs. J. Paquet, J. Rilling, T. Popa (Chair)
Title: Data Annotation and Ontology Provisioning for Semantic Applications in Virtualized Wireless Sensor Networks
Date: Thursday, November 26, 2015
Time: 9:30 a.m.
Place: EV 9.221
ABSTRACT
In recent years, virtualization in the Wireless Sensor Networks (WSNs) has become very popular for many reasons, including efficient resource management, proper sharing of the same WSN infrastructure by multiple applications. Semantic applications are gaining more and more momentum. However, provisioning of semantic applications in virtualized WSNs remain a big challenge; the data collected by the virtual sensor needs to be annotated and the pre-requisite of the data annotation process is to have an ontology that needs to be provisioned, i.e. developed, deployed and managed. Unfortunately annotating sensor data and ontology provisioning in virtualized WSNs is not easy because of limited resources of sensors, on-demand creation of virtual sensors and unpredictable lifetime. This thesis aims to propose a solution for provisioning of multiple semantic applications in the virtualized WSNs. The main contribution of this thesis is twofold. First, we propose an architecture to annotate sensor data in the virtualized WSN infrastructure and define a domain independent ontology named base ontology to perform data annotation. Second, we propose an architecture for provisioning base ontology in virtualized WSNs that consists of an ontology provisioning center for base ontology provisioning, an ontology enabled virtualized WSN and an ontology provisioning protocol that enables the interactions between the provisioning center and the ontology enabled WSN. We have built a proof-of-concepts prototype for a fire monitoring semantic application in the cloud environment using the Google App Engine and made performance measurement of the implemented prototype.