A QoS-aware Web Service Composition Approach Based on Cloud Model

An appropriate selection is of great importance to Web service composition. Current approaches normally focus on the average performance of quality of service (QoS) of Web services while not paying more attention to the performance such as stability considering the changing environments. In addition, Web services are differentiated from others with same functions which are provided by various physical origins of service requesters and service providers, which will lead to unexpected QoS of Web service system. To solve the two issues, this paper presents a QoS-aware strategy for Web service composition based on cloud model, and correspondingly designs a multi-objective Web service composition algorithm based on quantum genetic algorithm. The simulation based on a typical dataset validates the proposed approach finally.