QoS-Aware Composition of Web Services: A Look at Selection Algorithms

Authors:
Michael C. Jaeger;Gero Muhl;Sebastian Golze
Affiliations:
Institute of Telecommunication Systems;Institute of Telecommunication Systems;Institute of Telecommunication Systems
Venue:
ICWS '05 Proceedings of the IEEE International Conference on Web Services
Year:
2005

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Abstract

When a composition of Web services is designed, available services are put together to form a defined flow of executions. In a discovery process, a trader proposes available Web services as potential candidates. In a succeeding selection, for each task a trader chooses one candidate to form the optimal composition due to selection criteria. This paper discusses how the selection can consider different Quality-of-Service (QoS) categories to determine the mostsuitable candidates for the composition. If more than one categoryis used for optimisation, a multi-dimensional optimisation problemarises. This mentions similarities to similar combinatorial problems.Then, possible solutions are proposed and their performance isevaluated.