基于模糊层次分析法的多属性垂直切换算法  

Fuzzy AHP-Based Multi-Attribute Vertical Handover Algorithm

作　　者：姜开元[1] 顾学迈[1] 郭庆[1] 宁磊[1] 陈立明[1] 

机构地区：[1]哈尔滨工业大学通信技术研究所,黑龙江哈尔滨150001

出　　处：《华南理工大学学报（自然科学版）》2012年第9期104-109,122,共7页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家科技重大专项(2010ZX03005-003)

摘　　要：为实现移动节点在不同网络间的无缝切换,保证业务的连续性,提出了一种基于模糊层次分析法的多属性垂直切换算法.根据人类思维具有模糊性的特点,对各属性间的相对重要程度进行比较时用模糊数来表示比较结果,并建立模糊判决矩阵,以解决传统算法中判决矩阵的一致性与人类思维一致性之间存在的差异问题.为了提高切换的有效性,结合对用户运动状态、目标基站负载状态的判断,设计了一种自适应可变时长的定时器.仿真结果表明,文中算法能够提高切换性能和系统的吞吐量,降低系统的丢话率.In order to offer the seamless handover between different networks and the continuity guarantee of the traffic for mobile nodes, a multi-attribute vertical handover algorithm （ FAVHO ） is proposed based on the fuzzy analytic hierarchy process （FAHP）. In the algorithm, according to the fuzziness of human mind, fuzzy numbers are adopted to describe the comparison results of the importance of attributes and a fuzzy judgment matrix is established to eliminate the differences in the consistency between the judgment matrix and the human mind in traditional algorithms. For the purpose of improving the handovcr effectiveness, an adaptive timer is designed in view of the motion state of the mobile node and the load state of the target base station. Simulated results show that the proposed algorithm can improve the handover performance, increase the system throughput and reduce the dropping probability of the system.

关 键 词：异构网络 无线网络 垂直切换 层次分析法 模糊逻辑 自适应定时器 

分 类 号：TN929.53[电子电信—通信与信息系统]