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随着可用Web服务数量的增多,同时出现了许多不同的服务提供者提供的功能相同但性能各异的服务,如何选取合适的Web服务成为主要的研究热点.Web服务运行的载体是服务器,运行的结果需要利用网络进行传输,因此服务器和网络对Web服务的QoS具有很大的影响.本文通过建立服务的QoS与其所在环境状态(包括服务器状态和网络状态)的映射关系,为用户提供一种Web服务选取方法.该方法首先对Web服务环境执行状态建模,根据环境执行状态生成QoS关联规则,并利用关联规则生成决策表(环境状态与QoS的映射关系),最后根据决策表进行服务选取.实验结果表明,这种方法可以显著提高组合服务的质量.
With the increase of the number of available Web services and the simultaneous emergence of many different service providers with the same function but different performance services, how to choose the right Web service has become a major research hotspot.Web service is running on the server, run Of the results need to use the network for transmission, so the server and network of Web services QoS has a great impact.This paper establishes the service QoS and its environment state (including server status and network status) mapping, to provide users with a Web service selection method is proposed.Firstly, the Web service environment execution state is modeled, the QoS association rules are generated according to the environment execution status, and a decision table (environment state and QoS mapping relationship) is generated by the association rules, and finally the service selection is made according to the decision table The experimental results show that this method can significantly improve the quality of combined services.