Research Of The Web Services Model With QoS

Web Services appears that provides the means to make the application available over the Internet regardless of their development and operational platforms. With the popularity of Web Services, a number of Web Services with the same or similar functionality appear on the Internet. How to choose a service that can meet the requirements of the user becomes urgent, thus it is urgent to research QoS(Quality of Service) in Web Services.First of all, we propose a simple model of Web Services with QoS. Advertised QoS information is expressed in XML style format and is stored using tModel in the UDDI registry. QoS Broker selected the service which functionality and QoS required by the customer, based on the QoS values and reputation values maintained by the QoS broker. Then a computing model to calculate the QoS values is discussed in detail. Finally, a service matching and selection algorithm is presented.In this paper, based on the key technologies in the model described above, a travel service system implemented on the model show that the model of Web Services with QoS is feasible.