Study On Web Service Discovery Based On Concurrent Negotiation

With the deepening of Web service research and a lot of Web services being stableand easy to use being widely used, there is existing a serious problem that how todiscover Web service meeting the needs of the service requestor from the mass of Webservices quickly and accurately. Traditional Web servicer discovery methods standardsbased on UDDI and WSDL are based on the simple classification and keyword query,which is lack of describing the target query accurately, lack of a measure of the degreeof meeting between candidate services and the objectives of inquiry, lack of support fora variety of semantic query operation, affecting the precision and recall of Web services,and did not define Web service QoS(Quality of Service) information representationexplicitly, can only discover the functional Web services which is not the most suitableservice.In recent years, the service requester has increased the concern of non-functionalproperties of Web Service. In order to allow users to find the most suitable Web servicesof their own, the paper adds the consideration of the QoS non-functional properties intothe traditional framework, and then use concurrent negotiation mechanism to negotiateQoS parameters, and finally the use of the utility function to select the most appropriateservice from the successful negotiation of Web services, we propose a Web servicediscovery model based on concurrent negotiation.Details are as follows:①First, we studied the Computer Service-Oriented Architecture, Variouscharacteristics of Web services, Traditional Web service discovery framework research;Then analyze some flaws and shortcomings of traditional Web service discoveryframework, the importance of quality of service and the impact of Web servicediscovery.②We have studied Agent technology and multi-Agent system, and also we havestudied auto-negotiation, negotiation issues, negotiation protocols, many consultations,comparative study of various coordinated negotiation strategies and tactics used innegotiation.③We have studied a variety of Web service discovery methods and analyzed thecharacteristics of concurrent negotiation and QoS-based Web services, design aWeb-based service discovery concurrent negotiation model. This paper gives a discovery framework of this model, concurrent negotiation framework and designedmodel algorithm steps. Finally, we do experiment with the uniform linear strategy, easyto compromise negotiation strategies, and negotiation strategy based on historical rivalscomparing no negotiation algorithm experiments, The experiment results demonstratesthat the utility value gotten by concurrent negotiation is better than that ofnon-negotiation concurrent negotiation，so concurrent negotiation framework for Webservice discovery can get better service verifying the validity and accuracy of themodel.