无线传感器网络多层次模糊信任模型研究 .pdfVIP

学兔兔 第35卷 第7期 仪 器 仪 表 学 报 V01．35 No．7 2014年7月 Chinese Journal of Scientific[nstrnment Ju1．2014 无线传感器网络多层次模糊信任模型研究木 姚 雷，王东豪，梁 璇，万江文 (北京航空航天大学仪器科学与光电工程学院 北京 100191) 摘 要：为解决无线传感器网络中的恶意节点的识别问题，提出一种多层次模糊信任模型。新模型充分考虑影响节点信任度量的多 种要素，建立梯阶层次结构；采用层次分析法构造各层次判断矩阵，分别计算各层信任要素的权重；利用模糊推理方法对各信任要素子 集进行一级模糊综合评判，并对一级评判结果进行二级模糊综合评判，得到节点的综合信任值；根据节点的综合信任值检测出网络中 的恶意节点。实验和仿真结果表明，在网络规模和恶意节点比例变化时，该模型恶意节点检测率均可达到75％以上。 关键词：无线传感器网络；恶意节点；信任模型；模糊综合评价 中图分类号：TP393 文献标识码：A 国家标准学科分类代码：510．99 Research on multi—level fuzzy trust model for wireless sensor networks Yao Lei，Wang Donghno，Liang Xuan，Wan Jiangwen (School of Instrumentation Science and Opto—electronics Engineering，Beihang ，Belling 100191，China) Abstract：A trust model based on multi—level fuzzy system is put forward to identify malicious nodes in wireless sensor uetworks (WSNs)．The new model fully considers the multiple factors influencing the trust evaluation，and a hierarchy ladder structure is estab— lished．The analytical hierarchy process(AHP)method is used to construct the judgment matrixes of various hierarchies and calculate the weights of the trust factors in various hierarchies．The fuzzy reasoning method is used to ea／Ty out the single—level fuzzy comprehen- sire evaluation for various trust factor subsets；then a high—level fuzzy comprehensive evaluation is conducted on the previous evaluation result。and the node comprehensive trust values are obtained．According to the node comprehensive trust values，the malicious nodes in the network could be detected．Experiment and simulation results show that the detection rate of the malicious nodes fo