Abstract: In order to provide Top-k services with QoS guarantee and effectively reduce the load of the host server and the network involved, this paper proposes a Web service selection method named RTKS-QoS. By quantizing QoS attributes and calculating the value range of the utility function, it efficiently filters the Top-k services to meet the requirements. Experimental result shows that in the premise of ensuring precision, when k does not larger than the number of 12% of the candidate set of services, network load and response time of RTKS-QoS at least increase by 38% and 37%.

Key words: Web service, QoS, Top-k services selection

摘要： 为提供具有服务质量(QoS)保障的Top-k服务并有效降低服务选择系统对宿主服务器及网络带来的负载，提出一种Web服务选择方法RTKS-QoS。该方法在量化QoS属性的基础上，通过计算给定服务效用函数的取值空间，快速筛选出Top-k服务。实验结果证明，在保证查准率的前提下，当k取值不大于候选服务集合的12%时，RTKS-QoS的流量负载和响应时间至少提升了38%及37%。

关键词: Web服务, 服务质量, Top-k服务选择

CLC Number: 

• TP311