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Q-DWSO: hybrid approach for QoS-aware dynamic web services orchestration

Q-DWSO: hybrid approach for QoS-aware dynamic web services orchestration Many complex business-applications require the composition of tasks invoking multiple web services. The complexity of a composition process increases when a composition needs dynamic functionalities. Web services (WSs) of different service providers can be functionally identical, but have varying Quality of Service (QoS) attributes. A QoS optimisation is thus required at every stage in a composite web service (CWS). Maximising the overall utility functions are the need at both, component and composition levels. Local (task level) or global (composition using tasks in CWS) optimisation is currently used approach during the composition from the tasks. The present paper proposes a hybrid approach using the local as well as global optimisations. While local optimisation ensures the composition from the WSs in the trustworthy environment, the global optimisation satisfies the QoS constraints at the global level. The approach uses a hybrid orchestration structure. It maximises overall utility functions and reduces computational time related complexity. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Web Engineering and Technology Inderscience Publishers

Q-DWSO: hybrid approach for QoS-aware dynamic web services orchestration

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Publisher
Inderscience Publishers
Copyright
Copyright © Inderscience Enterprises Ltd
ISSN
1476-1289
eISSN
1741-9212
DOI
10.1504/IJWET.2018.092399
Publisher site
See Article on Publisher Site

Abstract

Many complex business-applications require the composition of tasks invoking multiple web services. The complexity of a composition process increases when a composition needs dynamic functionalities. Web services (WSs) of different service providers can be functionally identical, but have varying Quality of Service (QoS) attributes. A QoS optimisation is thus required at every stage in a composite web service (CWS). Maximising the overall utility functions are the need at both, component and composition levels. Local (task level) or global (composition using tasks in CWS) optimisation is currently used approach during the composition from the tasks. The present paper proposes a hybrid approach using the local as well as global optimisations. While local optimisation ensures the composition from the WSs in the trustworthy environment, the global optimisation satisfies the QoS constraints at the global level. The approach uses a hybrid orchestration structure. It maximises overall utility functions and reduces computational time related complexity.

Journal

International Journal of Web Engineering and TechnologyInderscience Publishers

Published: Jan 1, 2018

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