A Survey on QoS-Aware Dynamic Web Service Selection

With the ever increasing number of functional similar web services being made available on the Internet, how to leverage, aggregate and make use of individual component´s quality of service(QoS) information to derive the optimal QoS of the composite service which meets the needs of users is still an ongoing hot research problem. In this paper, the current QoS models and related calculation methods are first introduced, and the current strategies and approaches of services selection are then systematically analyzed and discussed. At last, several drawbacks of existing algorithms are pointed out and some research directions of this field for the future are proposed.