摘要： 为确保异构无线网络接入选择算法能够从备选网络中选择出性能最优的无线网络，提出一种新的异构无线网络接入选择算法。利用模糊层次分析法计算异构无线网络属性指标的主观权重，并运用粗糙集理论计算客观权重，根据业务需求对主客观权重进行动态调整，以达到最佳的服务质量。实验结果表明，该算法可降低网络切换频率，减少网络阻塞的发生概率，有效均衡网络负载，并能够较好地选择最佳的接入网络。

关键词: 异构无线网络, 接入选择, 主客观权重, 模糊层次分析, 粗糙集理论

Abstract: To address the problem that the current heterogeneous wireless network access selection algorithm has difficulty in selecting the best wireless network from the alternative networks,we propose a new heterogeneous wireless network access algorithm.First,we use the fuzzy hierarchy analysis method to calculate the subjective weight of the attribute index of heterogeneous wireless networks.Then,we use the rough weight to calculate the objective weight.Finally,according to the service requirement,we dynamically adjust the subjective and objective weights to select the best access network.Experimental results show that the proposed algorithm can reduce the network switching frequency and congestion occurrence probability,effectively balance the network load and perform better in selecting the best access network.

Key words: heterogeneous wireless network, access selection, subjective and objective weight, fuzzy hierarchy analytic, rough set theory

中图分类号: 

• TP393