基于QoS的Pareto最优的服务选择

Pareto optimal policy for QoS-based service selection

随着越来越多的服务能够满足用户的功能需求,需要一种策略基于服务的多种QoS属性来帮助用户选择合适的服务。以XML描述服务的QoS属性,提出了一种基于QoS的Pareto最优的服务选择策略,选择出那些不在所有的QoS属性上劣于其它服务的服务。实验结果表明,与随机选择和偏好导向的选择策略相比,Pareto最优策略有独特的效果。

With a wide variety of services are offered that can satisfy the functional requirements, a policy is needed to support users in the eventual selection of appropriate services according to multiple QoS attributes. Service＇s QoS attributes in XML is described and a Pareto optimal policy for service selection is proposed, which can select appropriate services not worse than any other service on all QoS attributes. The experimental results indicate that the Pareto optimal policy proposed outperforms the random selection and preferenceoriented policy.