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在大量相似服务共存竞争环境下,面向服务质量的Web服务选择成为研究热点.已有的服务选择方法通常假设同一时刻请求某种功能服务的请求者只有一个,并为其选择一个局部最佳服务.然而在网格服务环境下,同一时刻存在相对固定数目的多个服务提供者和多个服务请求者,要使网格服务资源利用率达到最优,需要进行整体规划,制定最优选择方案.本文利用层次分析法计算出请求者对各服务的QoS满意度与服务信任的满意度,将二者结合起来,计算出综合满意度,并基于综合满意度进行0-1整数规划,建立全局最优网格服务选择模型.最后,通过仿真实验,验证了该方法的有效性.
Under the circumstance that a large number of similar services coexist and compete, service-oriented Web service selection becomes a research hotspot.Existing service selection methods usually assume that there is only one requester requesting a certain kind of service at the same moment and choose a local best service However, in the grid service environment, there are a relatively fixed number of service providers and service requesters at the same time. To optimize the utilization of grid service resources, we need to make overall planning and formulate the optimal choice plan In this paper, we use the analytic hierarchy process (AHP) to calculate the requester’s QoS satisfaction and service trust satisfaction, and then combine the two to calculate the comprehensive satisfaction, and then make 0-1 integer programming based on the comprehensive satisfaction and establish the overall The optimal grid service selection model.Finally, the simulation results show the effectiveness of the proposed method.