支持组合服务选取的QoS模型及优化求解

QoS for Composite Web Services and Optimizing

提出了一个支持组合服务选取的Qos模型的层次结构,包括保证基本服务质量的基本服务Qos模型、反映组合服务特性的基本服务间关联Qos模型以及全面评价组合服务质量的组合服务QoS模型,并在此基础上给出了一个Qos驱动的组合服务选取算法．与同类成果相比,该模型在支持组合服务的动态选取、保证组合服务的整体质量方面具有较好的效果．

The provision of guaranteed QoS is critical to the success of Web Services in business domains. Thus, how to make the Composite Web Services meet users＇ QoS requirement becomes a hot issue in the research field. For such reason, this paper proposes a hierarchical structure for Composite Web Service selection oriented QoS including QoS for assuring quality of basic Web services, QoS for evaluating relation degree between services and QoS for measuring the whole quality of Composite Web Services. Based on this, a selection algorithm for QoS-driven Composite Web Services selection is also proposed. The experiment result demonstrates its efficiency.