QoS aggregation in Web service compositions | IEEE Conference Publication | IEEE Xplore

QoS aggregation in Web service compositions


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 me...Show More

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 explain how the data derived from the monitoring process can be used to calculate a more accurate aggregation of QoS for the composition.
Date of Conference: 29 March 2005 - 01 April 2005
Date Added to IEEE Xplore: 11 April 2005
Print ISBN:0-7695-2274-2
Conference Location: Hong Kong, China

References

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