基于车辆用户行为的异构网络垂直切换算法  

Vertical handoff algorithm in heterogeneous networks based on vehicle terminal behavior

作　　者：钱志鸿[1] 于新艺 许建华[2] 王雪[1] QIAN Zhi-hong;YU Xin-yi;XU Jian-hua;WANG Xue(College of Communication Engineering,Jilin University,Changchun 130012,China;The 41st Institute,CETC,Qingdao 266555,China)

机构地区：[1]吉林大学通信工程学院,长春130012 [2]中国电子科技集团公司第四十一研究所,山东青岛266555

出　　处：《吉林大学学报（工学版）》2019年第2期614-623,共10页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(61371092;61401175;61771219);吉林省科技发展计划项目(20160623014TC);长春市"双十工程"重大科技攻关计划(16SS02)

摘　　要：针对车辆用户提高垂直切换性能的问题,提出了一种基于行为的垂直切换算法。采用软件定义网络(SDN)架构,通过层次分析法,得到用户速度对于不同参数的影响因子,并结合方向确定垂直切换中的参数权重值。再利用马尔可夫过程构建不同权重值影响下的回报函数;利用模糊逻辑,根据速度确定决策间隔,得到完整算法。仿真结果表明:该算法可有效提高用户收益值,并可抑制频繁切换问题的发生,从而提高服务质量。In order to improve the performance of vertical handoff for vehicle terminals,a vertical handoff algorithm based on vehicle terminal behavior patterns is proposed.First,the factors for different parameters are determined according to the drive speed be means of Analysis Hierarchy Process(AHP)in the architecture of the Software Defined Network(SDN),and both of the factors and drive directions determine the weight value.Then,the Markov process is used to construct the reward function under the influence of different weight values.Finally,the decision interval is determined based on speed by means of the fuzzy logic and the algorithm is completed.The simulation results show that the proposed algorithm can effectively improve the revenue value of users and succeed to reduce the handoff time,so as to improve the Quality of Service(QoS)of the vehicle terminals.

关 键 词：通信技术 异构无线网络 垂直切换 马尔可夫过程 层次分析法 

分 类 号：TN92[电子电信—通信与信息系统]