A QoS-Aware Model for Web Services Discovery

With the increasing number of Web services on the Web, the service consumers are always presented with a group of services offering the similar functions. How to discover and find out the appropriate one among the large numbers of Web Services is the problem put on the desk. A service discovery mechanism in view of the functional and nonfunctional properties (i.e. QoS) is essential for Web services consumers. Base on the analyses of the known models, a QoS-aware model for Web services discovery is proposed, by introducing QoS broker. The merit of this model is that QoS description is introduced from the beginning of the Web service providers publishing their services, and it does not need to modify the standard UDDI interface. So the client side software can transparently plug on without any extra modification. In the meantime, the model can discovery seemly Web services with real-time, fair and authentic QoS information by its monitoring and valuation mechanism.