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Using CBR Method for Multi-Agent Selection of Multiple and Dynamic Composite Web Service

Authors:
Fatma Siala
Khaled Ghedira

Keywords: Web service; QoS; Multi-Agent System; Contract- Net Protocol; execution paths; availability; CBR technique.

Abstract:
It is well-known that Web service technologies provide an easy way to integrate the applications within and across organizational boundaries. Web services are usually overlapping in functionality and how to make a choice based on non-functional factors becomes a problem that needs to be solved. This paper, argues that the selection of component services should be considered in a global manner based on the Web services availability and the users QoS preferences. Indeed, QoS becomes one of the most important factors for Web service selection. 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 and CBR (Case Based Reasoning) method. The objective of the agents is to find out the best Composite QoS (CQoS) based on Web services availability and elementary Web services QoS. By using CBR method, agents can memorize QoS scores. This framework supports different combinations and execution paths. The proposed Multi-Agents framework is compared to an existing approach in terms of execution time. Experiments have demonstrated that our framework provides reliable results in comparison with the existing one.

Pages: 23 to 29

Copyright: Copyright (c) IARIA, 2012

Publication date: May 27, 2012

Published in: conference

ISSN: 2308-3972

ISBN: 978-1-61208-200-4

Location: Stuttgart, Germany

Dates: from May 27, 2012 to June 1, 2012