基于模糊层次分析法的异构系统网络选择算法

利用模糊层次分析法对无线局域网（WLAN）和通用移动通信系统（UMTS）组成的集成网络中面临的网络选择问题进行了研究，提出了一种结合层次分析法和模糊综合评价法的网络选择新算法。通过对影响集成系统网络选择因素进行分析，建立了网络选择决策模型，计算出了各因素的权重；通过对模糊综合评价模型的分析，提出了计算相对隶属度的方法。由各因素相对隶属度和权重计算总隶属度，并据此选择最优网络。仿真结果验证了该算法的正确性与有效性。

A Network Selection Algorithm Based on Fuzzy Analytic Hierarchy Process in Heterogeneous Systems

Network selection problem in wireless local area network(WLAN) and universal mobile telecommunications system(UMTS) integrated network was studied using fuzzy analytic hierarchy process.A novel network selection algorithm was proposed.It combines analytic hierarchy process and fuzzy comprehensive evaluation.By analyzing the factors that influence network selection in integrated systems,a network selection decision-making model was founded and the weights of these factors were calculated.A method for calculating relative-membership grade was proposed by analysis of fuzzy comprehensive evaluation model.Total membership grade was calculated through relative-membership grade and the weights of these factors.The optimum network was selected according to total membership grade.The validity and accuracy of the algorithm was confirmed by the simulation.