Multi-agent selection of multiple composite web services based on CBR method and driven by QoS

  • Authors:
  • Fatma Siala;Soufiene Lajmi;Khaled Ghedira

  • Affiliations:
  • University of Tunis, SOIE, Tunis, Tunisia;University of Tunis, SOIE, Tunis, Tunisia;University of Tunis, SOIE, Tunis, Tunisia

  • Venue:
  • Proceedings of the 13th International Conference on Information Integration and Web-based Applications and Services
  • Year:
  • 2011

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Abstract

Many companies aim to use Web services to integrate heterogeneous or remote applications in SOA (Service Oriented Architecture) contexts. Indeed, one of the main assets of service-orientation is a composition to develop higher level services, so-called composite services, by re-using existing services. Since many available Web services provide overlapping or identical functionality, with different Quality of Service (QoS), a choice needs to be made to determine which services are to participate in a given composite service. However, for a composition, we can have different combinations and execution paths. Particularly, a composite service can generate different schemes that give various QoS scores. This paper presents a framework which deals with the selection of composite Web services on the base of Multi-Agents negotiation. The objective of these agents is to find out the best Composite QoS (CQoS) based on Web services availability. This scalable framework supports different combinations and execution paths using CBR technique. The proposed Multi-Agents framework is compared to an existing approach in terms of execution time. Experiments have demonstrated that our framework provide reliable results in comparison with the existing approach.