Reputation-Enhanced Web Services Discovery with QoS
Ziqiang Xu · 2006
With an increasing number of Web services providing similar functionalities, more emphasis is being placed on how to find the service that best fits the consumer’s requirements. In order to find services that best meet their QoS requirements, the service consumers and/or discovery agents need to know both the QoS information for the services and the reliability of this information. The problem, however is that the current UDDI registries do not provide a method for service providers to publish the QoS information of their services, and the advertised QoS information of Web services is not always trustworthy. We propose a simple model of reputation-enhanced Web services discovery with QoS. Advertised QoS information is expressed in XML style format and is stored using tModels in a UDDI registry. Services that meet a customer’s functionality and QoS requirements are ranked using the service reputation scores which are maintained by a reputation management system. A service matching, ranking and selection algorithm is presented and evaluated.