电子学报 ›› 2020, Vol. 48 ›› Issue (5): 891-898.DOI: 10.3969/j.issn.0372-2112.2020.05.008

• 学术论文 • 上一篇    下一篇

基于区间标记判决的稳健垂直切换算法研究

马彬1,2, 汪思霖1, 谢显中2   

  1. 1. 重庆邮电大学计算机科学与技术学院, 重庆 400065;
    2. 重庆邮电大学重庆市计算机网络与通信技术重点实验室, 重庆 400065
  • 收稿日期:2019-06-02 修回日期:2019-08-08 出版日期:2020-05-25 发布日期:2020-05-25
  • 通讯作者: 汪思霖
  • 作者简介:马彬 男,1978年出生,教授.主要研究方向异构无线网络,认知无线电网络等.E-mail:mab_cqupt@sina.com;谢显中 男,1966年生,教授.主要研究方向认知无线电、干扰对齐与MIMO技术、绿色通信等.E-mail:xiexzh@cqupt.edu.cn
  • 基金资助:
    重庆市教委科学技术研究计划重大项目(No.KJZD-M201900602);重庆市教委科学技术研究重点项目(No.KJZD-K201800603);重庆市自然科学基金(No.CSTC2018jcyjAX0432);重庆市研究生科研创新项目(No.CYS19252)

Research on Robust Vertical Handoff Algorithm Base on Interval Mark Decision

MA Bin1,2, WANG Si-lin1, XIE Xian-zhong2   

  1. 1. Institute of Computer Science and Technology, Chongqing University of Post and Telecommunication, Chongqing 400065, China;
    2. Chongqing Key Laboratory of Computer Network and Communication Technology, Chongqing University of Post and Telecommunication, Chongqing 400065, China
  • Received:2019-06-02 Revised:2019-08-08 Online:2020-05-25 Published:2020-05-25

摘要: 在异构5G网络中,针对切换算法稳健性差引起的切换准确率低的问题,提出一种基于区间标记判决的稳健垂直切换算法.首先,引入中位值平均滤波法,获取更准确的网络参数.其次,基于参数波动特征分析,提出区间标记判决算法,保证候选网络筛选通过率和准确率的同时,提高区间标记判决算法的稳健性.再次,根据移动终端传输层需求,结合终端运动趋势,分别使用不同权值的效用函数获得最佳目标网络.最后,仿真结果表明,该算法能够有效提升切换触发和网络筛选的准确率,降低切换失败率和乒乓效应,提高系统吞吐量,并能够根据移动终端的需求选择最佳目标网络.

关键词: 异构5G网络, 垂直切换, 中位值平均滤波, 区间标记判决

Abstract: In heterogeneous 5th generation network,a robust vertical handoff algorithm based on interval mark decision is proposed to solve the problem of low handoff accuracy,which is caused by poor robustness of current vertical handoff algorithms.Firstly,the median average filter method is employed to obtain more accurate network attribute values.Secondly,based on parameter fluctuation characteristic analysis,an interval mark decision algorithm is proposed to ensure the pass rate and accuracy of candidate network screening,moreover,the robustness of the handoff process is also effectively improved.Thirdly,according to the transmission layer requirements and motion trend of the mobile terminals,the optimum target network is obtained by using utility functions with different weights.Finally,the simulations show that the proposed algorithm can effectively improve the accuracy of handoff triggering and network screening while reducing the failed handoff and the ping-pong effect.Not only that,the total network throughput is also improved.Meanwhile,it chooses the best target network according to the requirements of mobile terminals.

Key words: heterogeneous 5G network, vertical handoff, median average filter, interval mark decision

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