The Strategy of Description and Computation for User's QoS Preference

In order to satisfy userspsila individual QoS requirements, the paper studied the QoS attributes of grid service, and put forward several ways to describe QoS preference information: ordering vector, AHP judgement matrix and language evaluation collection, and gave out the concrete methods of conversion and compulation. At the same time, a method of selecting the relatively optimal service was presented which can reflect userspsila QoS preference. The numerical example analysis indicates that the method for user QoS preference is conscientiously feasible.