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QoS Aggregation in Web Service Compositions
Citation key JaRoMu:2005:QoSAggregation
Author Michael C. Jaeger and Gregor Rojec-Goldmann and Gero Mühl
Title of Book 2005 IEEE International Conference on e-Technology, e-Commerce and e-Service (EEE-05)
Pages 181–185
Year 2005
ISBN 0-7695-2274-2
Address Hong Kong, China
Month mar
Publisher IEEE Press
Abstract For the composition of Web services non-functional characteristics are commonly considered criteria for finding and selecting available services. Our work focuses on a mechanism that determines the overall Quality-of-Service (QoS) of a composition by aggregating the QoS of the individual services. With aggregated QoS it can be verified whether a set of services satisfies the QoS requirements for the whole composition or not. The aggregation performed builds upon abstract composition patterns, which model basic structural elements of a composition like parallel paths, a sequence, or a looped execution. In this work we extend existing composition patterns with the abilities to consider dependencies between services. Furthermore we introduce, how to use the pattern-based aggregation in the monitoring process during run-time. We will explain how the data derived from the monitoring process can be used to calculate a more accurate aggregation of QoS for the composition.
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