关键词: Web服务，服务质量，QoS获取，QoS计算

Abstract: With the vigorous development of Web Services technologies, Web Services’QoS(Quality of Service) has been paid much more attention. Recent research mainly focused on Qos-based applications, such as Qos-based dynamic composition and negotiation. Most of these researches are based on lots of reliable QoS Data. However, there are lots of limitations in current QoS collection methods,such as the exactness of QoS is not vary high and the amount of QoS is small. This paper focused on the collection of QoS advances a QoS collection and management frame (QosCollectionFrame). In this frame,this paper gave a research on QoS collection methods from multi sources,including the service-client end, the serviceprovider end, the onlinctest of Web service. Based on this research, this paper gave implementalions of these QoS collection methods.

Key words: Web service, Quality of service, QoS collection, QoS estimate