Survey on service composition approach considering trustworthiness of QoS data
QoS可信的服务组合技术研究*

The existing QoS-based services composition approaches always assume that the QoS data coming from service providers and users are effective and trustworthy, but it is impossible in reality. The influence of deceiving services for service composition is generally fatal. So, this paper proposed a service composition optimize approach considering the trustworthiness of QoS data. It analysed the source of QoS data and proposed relevant system architecture, then proposed an algorithm to formulate the QoS dependability. According to the social manner, it gave an introduction of direct evidence and indirect evidence in QoS computation, differentiated the function of direct evidence and indirect evidence, and then proposed the model of QoS computation. It further gave corresponding algorithms. Finally, implemented a prototype system to evaluate the proposed approach through comprehensive experiments and achieved improved results both in usability and efficiency.