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高空平台通信系统中基于预测的小区切换算法

何攀峰 程乃平 倪淑燕

何攀峰, 程乃平, 倪淑燕等 . 高空平台通信系统中基于预测的小区切换算法[J]. 北京航空航天大学学报, 2017, 43(3): 551-558. doi: 10.13700/j.bh.1001-5965.2016.0627
引用本文: 何攀峰, 程乃平, 倪淑燕等 . 高空平台通信系统中基于预测的小区切换算法[J]. 北京航空航天大学学报, 2017, 43(3): 551-558. doi: 10.13700/j.bh.1001-5965.2016.0627
HE Panfeng, CHENG Naiping, NI Shuyanet al. Cell handover algorithm based on prediction in HAPS communication system[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(3): 551-558. doi: 10.13700/j.bh.1001-5965.2016.0627(in Chinese)
Citation: HE Panfeng, CHENG Naiping, NI Shuyanet al. Cell handover algorithm based on prediction in HAPS communication system[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(3): 551-558. doi: 10.13700/j.bh.1001-5965.2016.0627(in Chinese)

高空平台通信系统中基于预测的小区切换算法

doi: 10.13700/j.bh.1001-5965.2016.0627
基金项目: 

国家“863”计划 2015AA7011071

详细信息
    作者简介:

    何攀峰,男,博士研究生。主要研究方向:无线通信网络、卫星通信系统

    程乃平,男,博士,教授,博士生导师。主要研究方向:无线通信网络、卫星通信系统

    倪淑燕,女,博士,讲师。主要研究方向:无线通信网络、数字波束赋形

    通讯作者:

    程乃平, E-mail:cheng_np@163.com

  • 中图分类号: TN929.3

Cell handover algorithm based on prediction in HAPS communication system

Funds: 

National High-tech Research and Development Program of China 2015AA7011071

  • 摘要:

    在平流层的环境中,高空平台(HAPS)的扰动特性严重影响了通信系统的小区切换性能。在平台扰动和终端移动的场景中,基于固定门限的切换算法容易增加不必要的切换次数,切换性能较差。建立HAPS覆盖模型,用户终端根据其速度动态选择切换检测周期,提出基于接收信号强度差分最小均方预测的自适应切换算法,推导了无线链路失败率的上限。仿真结果表明,相比传统固定门限的切换算法,本文算法有效降低了不必要的切换,同时还可将无线链路失败率控制在1%以下,能够适应多种通信场景。

     

  • 图 1  波束覆盖几何模型

    Figure 1.  Geometric model of beam coverage

    图 2  高空平台扰动造成用户在小区间切换

    Figure 2.  Inter-cell user handover caused by HAPS disturbance

    图 3  k步LMS预测器

    Figure 3.  k-step LMS predictor

    图 4  基于RSS预测的切换过程

    Figure 4.  Handover process based on RSS prediction

    图 5  仿真切换场景

    Figure 5.  Handover scenes of simulation

    图 6  不同预测方法性能比较

    Figure 6.  Comparison of performance of different prediction methods

    图 7  差分LMS预测性能

    Figure 7.  Prediction performance of differential LMS

    图 8  不同切换算法的性能比较

    Figure 8.  Comparison of performance of different handover algorithms

    表  1  仿真参数列表

    Table  1.   List of simulation parameters

    仿真参数 数值
    平台高度/km 22
    平台位置变化范围/m 水平±400,垂直±700
    平台姿态变化范围/(°) 摆动角±1,偏航角±1
    小区波束发射功率/mW 10
    蜂窝层数 5
    小区半径/km 3.15
    频率/GHz 2.1
    带宽/MHz 20
    路径损耗模型 自由空间损耗,路径损耗指数为2
    阴影衰落分布 对数正态分布,标准差为1~5 dB
    用户终端速度/(km·h-1) 5~120
    用户初始位置 距离小区边缘1 km处
    仿真时间/s 200
    下载: 导出CSV
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出版历程
  • 收稿日期:  2016-07-27
  • 录用日期:  2016-09-09
  • 刊出日期:  2017-03-20

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