东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2009, Vol. 30 ›› Issue (10): 1413-1416.DOI: -

• 论著 • 上一篇    下一篇

避免无用重选取的QoS劣化阈值模型及计算

代钰;杨雷;朱志良;张斌;   

  1. 东北大学软件学院;东北大学信息科学与工程学院;
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2009-10-15 发布日期:2013-06-22
  • 通讯作者: Dai, Y.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(60773218,60872040,60903008);;

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

Dai, Yu (1); Yang, Lei (2); Zhu, Zhi-Liang (1); Zhang, Bin (2)   

  1. (1) School of Software, Northeastern University, Shenyang 110004, China; (2) School of Information Science and Engineering, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2009-10-15 Published:2013-06-22
  • Contact: Dai, Y.
  • About author:-
  • Supported by:
    -

RichHTML

0

PDF (PC)

649

摘要： 为了避免QoS优化效果不好的无用重选取,需要判断QoS的劣化是否将影响组合服务对全局质量约束的满足,为此,建立了QoS劣化阈值模型.通过QoS劣化阈值反映QoS劣化程度与组合服务全局质量约束满足之间的关系,从而触发QoS优化效果较好的有用重选取.根据组合服务的流程结构,给出了QoS劣化阈值的计算规则和相应方法.实验表明,所提出的QoS劣化阈值计算方法能够有效地避免无用重选取,保证重选取的QoS优化效果.

关键词: QoS, 组合服务, 组合流程, QoS劣化阈值, 重选取

Abstract: 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.

中图分类号: