基于QoS与可信度融合的Web服务选择机制研究

Research on QoS-reliability Fusion Based Selection Mechanism for Web Service

随着Web服务的快速发展,大量相似的Web服务功能发布至Internet。为从Web服务集合中过滤出请求者需求的Web服务,探讨了一种基于QoS与可信度融合的Web服务选择机制。针对Web功能相似的复杂性,剖析了目前选择机制中存在的局限性,借助对服务可信度的综合评估,通过第三方的服务质量监控数据,从主观和客观两个方面评价Web服务选择,基于QoS监控、目标消费群、服务质量评估与评价反馈模型,提出了基于QoS与可信度融合的Web服务选择模型。仿真实验结果验证了该模型既可适应动态变化的环境,又可保证真实的服务质量,克服了评价标准的个体差异性。研究结果表明,提出的服务选择方法是可行与可用的。

With speedy development of Web service, the function of similar Web service in abundance has been more and more issued to Internet. In order to filter out the Web service needed by requester from the set of Web service, the paper explored a sort of selection mechanism of Web service based on the fusion of QoS and reliability. Aimed at the similar complexity of Web function, it made the anatomy of existent limitation in the current selection mechanism. By means of integrated estimation of service reliability,and through the monitoring data of service quality in third side, it evaluated the Web service selection from two aspects in subjectivity and objectivity factors, and based on the model of QoS moni- toring,target consumption group, service quality estimation and evaluation feedback, it finally proposed the model of Web service selection. The paper took case to make the simulation,and validated that the mechanism not only could adapt dynamic varying environment, but also could ensure the actual service quality, and overcame the individual diffe- rence of evaluation. The research results show that the proposed method of service selection is feasible and practicable.