Model of QoS degrading threshold and its computation for avoiding useless re-selection

作者：Dai Yu^*; Yang Lei; Zhu Zhi Liang; Zhang Bin

来源：Journal of Northeastern University, 2009, 30(10): 1413-1416.

• Composite process
• Composite service
• QoS
• QoS degrading threshold
• Re-selection

To avoid the useless re-selection which results in unideal optimization of QoS, it is necessary to judge whether the degradation level of QoS will affect the constraint conditions which the globally combinational QoS should satisfy. Thus, a model of QoS degrading threshold was developed to reflect the relation between the degradation level of QoS and the satisfaction of constraint on global QoS so as to trigger off the useful re-selection for better optimization. According to the structure of flow of composite service, the computational rules of the QoS degrading threshold and corresponding methods were given. Experiment results showed that the proposed methods are effective for avoiding useless re-selection and providing the ideal optimization for QoS through re-selection.

• 出版日期2009
• 单位东北大学