摘要
分析了已有的服务选择方法所存在的不足,根据基于QoS的服务选择方法类型的特点,提出采用QoS属性计算与QoS语义二者结合的方法进行服务选择。通过功能分类、服务相似度比较、QoS排序选择筛选掉大量Web服务,降低了全局算法的计算量,通过最短路径算法进行服务选择克服了局部优化无法考虑全局QoS约束的缺点,达到既满足组合服务中单个服务选择的局部约束条件,又满足组合服务全局约束条件的效果,最终使用户得到相对最优的组合服务。最后通过实例对提出的方法进行了验证。
Existing methods of services selection are analyzed and their shortcomings are pointed out. According to characteristics of service selection based on QoS, combination of both QoS attributes calculation methods and QoS semantic approach to select services is adopted. By functional classification, services similarity comparison, QoS ranking and selection, lots of web services and reduce the computation amount of overall algorithm is removed. Furthermore, the overall service selection adopt the shortest path algorithm to overcome the shortcomings which the local optimization not consider the overall QoS constraints. Achieved the purpose of satisfying local service constraints and overall service constraints, the users obtain the relatively optimal services. Finally verifying proposed method by examples.
出处
《计算机工程与设计》
CSCD
北大核心
2009年第3期747-751,共5页
Computer Engineering and Design
关键词
WEB服务
服务质量
服务属性
服务路径
组合服务
web service
quality of services
service attribute
service path
composition servtce
