Web服务动态组合中QoS计算方法研究

摘要

通过在Web服务动态组合中引入形式化的服务质量(QoS)描述、服务提供商因子、服务消费者因子,提出基于层次分析法的QoS计算方法.该方法根据服务消费者期望值选择QoS因子,利用QoS权重值计算Web服务的质量,在此基础上给出一个基于QoS计算的Web服务组合模型,并通过实例计算,证明利用该QoS计算方法可以得到更高质量的增值服务.%By introducing formal Quality of Service(QoS) description, service provider factor, service consumer factor in Web services dynamic composition, a method of QoS computing based on Analytic Hierarchy Process(AHP) is proposed.It selects QoS factors according to service consumer expectations, computes the quality of Web service with QoS weight, and proposes a QoS-based Web services dynamic composition model.An example is provided to prove that higher quality value-added services can be obtained with the computing method proposed.