基于语义的QoS感知Web服务发现机制  

QoS-aware Web Services Discovery Scheme Based on Semantic

作　　者：王晓峻[1] 毛莺池[2] 钱国锋[2] 

机构地区：[1]河海大学水利水电学院,南京210098 [2]河海大学计算机与信息学院,南京210098

出　　处：《计算机科学》2010年第8期133-138,共6页Computer Science

基　　金：河海大学自然科学基金项目(编号:2008428911)资助

摘　　要：随着提供相同功能的Web服务数量的日益增多,服务质量(Quality of Service,QoS)成为用户选择Web服务的重要考虑因素。目前,通过对服务QoS属性在语法层匹配来提供Web服务选取的机制不能很好地满足复杂QoS属性匹配的要求。研究了基于用户QoS需求偏好,将用户需求的QoS与候选服务的QoS进行语义比较,结合约束规划(Constraint Programming)方法,在语义层匹配Web服务的QoS属性,选取满足匹配要求的服务,最后对满足QoS属性值约束的候选服务进行优化选择处理,获取最终匹配的候选服务。With the increase of Web services with the similar or same functionality, QoS （Quality of Service） has become the important criteria for users to select the appropriate Web services. At present, most approaches to the QoS- based Web services selection suffer from the purely syntactic matchmaking, which could not meet the requirements of complicated QoS matchmaking in semantic level. In this paper, we proposed a based on semantic QoS-aware Web service discovery scheme. Initially, a QoS ontology was presented to define QoS data into service descriptions. Then, the ontology reasoning was adopted to change previous syntactic matchmaking into a semantic way. Through confirming the compatibility of concepts, complicated QoS conditions were solved as constraints via constraints programming. The optimization algorithm based on QoS was proposed to obtain the appropriate service to users. Finally,case study was given to illustrate the effectiveness of discovery scheme.

关 键 词：WEB服务发现 QOS感知 约束规划 语义 WEB 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]