A flexible semantic service composition framework for pervasive computing environments

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Enformatik Enstitüsü, Bilişim Sistemleri Anabilim Dalı, Türkiye

Tezin Onay Tarihi: 2014

Öğrenci: MUSTAFA ÖZPINAR

Danışman: PEKİN ERHAN EREN

Özet:

With the advances in technology, high-speed connections, powerful and low cost devices have become available. İt is estimated that there will be tens of billions of devices connected to the İnternet by 2020. However, for the effective use of such an outstanding number of devices, they should be able to communicate with each other in different scenarios. A commonly agreed structure should be adopted to overcome the communication problem of heterogeneous devices. Web of Things (WoT) is a vision about quickly connecting devices and services by reusing the Web standards. İn this way, the communication protocol is provided, but service definition, composition and resolving the meaning of data stay as challenging problems. The goal of this thesis study is to investigate the area of semantic service composition, to propose a composition architecture, and to design a proof-of-concept system using heterogeneous networked devices. Accordingly, a lightweight ontology is constructed in order to define services semantically. A service registry solution considering WoT constraints is presented for publishing and discovering services, and a rule-based flexible semantic service composition framework is proposed for composing services to achieve a goal. A proof-of-concept system including some features of the proposed solution is implemented on real devices in order to assess its feasibility. In addition, the proposed solution is compared with existing frameworks by examining scenarios and features.