基于可信度量的网络组件性能评估方法

Evaluation approach for network components performance using trustworthiness measurement

针对新型网络及其服务构建中所涉及的网络组件选择问题,以可信评估思想为指导,通过多属性决策建模,提出一种网络组件性能评估方法。首先,针对网络应用环境的灵活多变特征,设计了一种按需驱动的可信指标树动态构建策略。其次,利用模糊层次分析法减小主观权重计算的不确定性,并将主客观权重相结合以提高赋权操作的公平性。最后,在评估决策阶段,综合运用指标数据效用转换、可信属性向量构造和向量间的相对近似度计算等策略得到评估结果。通过对软件定义网络控制器的实际案例分析,验证了所提评估方法的合理性及有效性。

For the network components selecting problem involved in the process of building the new network and network service, a network component evaluation method was proposed based on the trustworthiness measurement and the model of the multiple attribute decision analysis. First of all, according to the flexible characteristics of the network application environment, an on-demand driven and dynamic strategy was designed for constructing trustworthiness index tree. Secondly, the uncertainty of the subjective weight was reduced by using the fuzzy analytic hierarchy process, and the combination weight calculated from the subjective and objective weight was used to improve the fairness of weighting operation. Next, in the decision stage, the evaluation results were obtained through the integrated use of processing strategies which include the index data utility transformation, the trustworthiness attribute vector construction and the calculation of vector relative approximation degree. Finally, the rationality, applicability and validity of the presented approach are demonstrated with the evaluation of the software defined network controllers, and the results contribute to provide operators more decision information.