基于模糊多属性综合权重的异构网络选择算法研究

Heterogeneous Network Selection Algorithm Based on Fuzzy Multi-Attribute and Comprehensive Weight

针对目前异构网络选择算法在确定指标权重存在主观性的问题,提出基于模糊多属性综合权重的卫星异构无线网络选择算法。利用模糊所属性决策分析法确定各评价参数的主观权重,利用熵值法计算网络性能差异的客观权重,通过对相对隶属度的加权排序,得到最优接入网络。仿真结果证明,该算法能有效降低不同类型业务的网络切换次数,改善了终端的丢包率性能,提高了网络的选择准确性和有效性。

A heterogeneous wireless network selection algorithm based on fuzzy multi-attribute and comprehensive weight is proposed aiming at the subjectivity exists in the index-weight decision of normal algorithms. The subjective weights of indexes are calculated with fuzzy multi-attribute decision making method. Finally, the optimal access network is chosen through the weighted ranking of the relative mem- bership degree. The results of simulation indicate that the algorithm could decrease the degrees of network switching efficiently, the performance of packet dropping probability is improved, and the selection accu- racy of optimized network according to its business types is increased