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

doi:10.13700/j.bh.1001-5965.2016.0627

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

1.
装备学院研究生管理大队, 北京 101416
2.
装备学院光电装备系, 北京 101416

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
计量
- 文章访问数: 743
- HTML全文浏览量: 51
- PDF下载量: 487
- 被引次数: 0
出版历程
- 收稿日期: 2016-07-27
- 录用日期: 2016-09-09
- 网络出版日期: 2017-03-20

Cell handover algorithm based on prediction in HAPS communication system

1.
Department of Graduate Management, Equipment Academy, Beijing 101416, China
2.
Department of Optical and Electronic Equipment, Equipment Academy, Beijing 101416, China

Funds:

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

摘要

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。
- 高空平台 (HAPS) /
- 覆盖模型 /
- 预测 /
- 最小均方 /
- 切换
Abstract:
In the environment of stratosphere, the quasi-stationary characteristics of high altitude platform station (HAPS) seriously affect handover performance of the communication system. In the scenes of platform disturbance and mobility of terminal, the handover algorithm based on fixed thresholds is easy to increase the number of unnecessary handover and shows poor handover performance. HAPS coverage model was established, and the handover detection period can be changed with speed of user terminals. Then the adaptive handover algorithm was proposed to trigger handover based on signal strength, which is predicted by differential least mean square method. The upper limit of the radio link failure rates was also derived. The results of simulation indicate that compared with traditional fixed-threshold methods, the proposed algorithm effectively reduces the unnecessary handover, and keeps radio link failure rate under 1%, which makes it adaptable to a variety of communication scenarios.
- high altitude platform station (HAPS) /
- coverage model /
- prediction /
- least mean square /
- handover

HTML全文

图 1 波束覆盖几何模型

Figure 1. Geometric model of beam coverage

下载: 全尺寸图片幻灯片

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

下载: 全尺寸图片幻灯片

图 3 k步LMS预测器

Figure 3. k-step LMS predictor

下载: 全尺寸图片幻灯片

图 4 基于RSS预测的切换过程

Figure 4. Handover process based on RSS prediction

下载: 全尺寸图片幻灯片

图 5 仿真切换场景

Figure 5. Handover scenes of simulation

下载: 全尺寸图片幻灯片

图 6 不同预测方法性能比较

Figure 6. Comparison of performance of different prediction methods

下载: 全尺寸图片幻灯片

图 7 差分LMS预测性能

Figure 7. Prediction performance of differential LMS

下载: 全尺寸图片幻灯片

图 8 不同切换算法的性能比较

Figure 8. Comparison of performance of different handover algorithms

下载: 全尺寸图片幻灯片

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

参考文献(15)

[1]	白琳, 梁仙灵, 肖振宇, 等.空间多维协同传输理论与关键技术[M].北京:人民邮电出版社, 2015:6-7. BAI L, LIANG X L, XIAO Z Y, et al.Spatial multidimensional cooperative transmission theories and key technologies[M].Beijing:The People's Posts and Telecommunications Press, 2015:6-7(in Chinese).
[2]	WIDIAWAN A K, TAFAZOLLI R.High altitude platform station (HAPS):A review of new infrastructure development for future wireless communications[J].Wireless Personal Communications, 2007, 42(3):387-404. doi: 10.1007/s11277-006-9184-9
[3]	ALBAGORY Y, NOFAL M, GHONEIM A.Handover performance of unstable-yaw stratospheric high-altitude stations[J].Wireless Personal Communications, 2015, 84(4):2651-2663. doi: 10.1007/s11277-015-2758-7
[4]	管明祥. HAPS资源管理及容量估算研究[D]. 哈尔滨: 哈尔滨工业大学, 2008: 52-56. GUAN M X.Research on resource management and capacity estimation method for HAPS[D].Harbin:Harbin Institute of Technology, 2008:52-56(in Chinese).
[5]	LI S F, WANG L, DAVID G, et al.Cooperative directional inter-cell handover scheme in high altitude platform communications systems[J].Journal of Electronics (China), 2011, 28(2):249-257. doi: 10.1007/s11767-011-0574-0
[6]	AN F, WANG Y, MENG F.A load balancing handoff algorithm based on RSSI and energy-aware in HAPs network[C]//IEEE International Conference on Signal Processing, Communication and Computing.Piscataway, NJ:IEEE Press, 2013:1-6.
[7]	ALSAMHI S H, RAJPUT N S.An intelligent hand-off algorithm to enhance quality of service in high altitude platforms using neural network[J].Wireless Personal Communications, 2015, 82(4):2059-2073. doi: 10.1007/s11277-015-2333-2
[8]	ALSAMHI S H, RAJPUT N S.Neural network in intelligent handoff for QoS in HAP and terrestrial systems[J].International Journal of Materials Science and Engineering, 2014, 2:141-146. https://www.researchgate.net/publication/268807653_Neural_Network_in_Intelligent_Handoff_for_QoS_in_HAP_and_Terrestrial_Systems
[9]	管明祥, 郭庆, 顾学迈.高空平台不稳定性对HAPS通信性能影响建模与分析[J].电子学报, 2012, 40(10):1948-1953. http://www.cnki.com.cn/Article/CJFDTOTAL-DZXU201210008.htm GUAN M X, GUO Q, GU X M.Model and evaluation for performance effects by instability of HAP for HAPS communication[J].Acta Electronica Sinica, 2012, 40(10):1948-1953(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-DZXU201210008.htm
[10]	翁丽娜, 杨杰, 柯海舟, 等.基于时间序列分析的链路质量预测和稳定路由算法研究[J].电子与信息学报, 2011, 33(4):885-889. http://www.cnki.com.cn/Article/CJFDTOTAL-DZYX201104021.htm WENG L N, YANG J, KE H Z, et al.A time series analysis-based link quality prediction algorithm and its application to reliable routing[J].Journal of Electronics & Information Technology, 2011, 33(4):885-889(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-DZYX201104021.htm
[11]	HEGAZY R D, NASR O A.A user behavior based handover optimization algorithm for LTE networks[C]//IEEE Wireless Communications and Networking Conference.Piscataway, NJ:IEEE Press, 2015:1255-1260.
[12]	闫继垒, 李建东, 赵林靖.异构无线网络环境下的切换触发时间选择算法[J].通信学报, 2011, 32(11):126-132. http://www.cnki.com.cn/Article/CJFDTOTAL-TXXB201111018.htm YAN J L, LI J D, ZHAO L J.Handover trigger time selection algorithm in heterogeneous wireless networks environment[J].Journal on Communications, 2011, 32(11):126-132(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-TXXB201111018.htm
[13]	YOO S J, CYPHER D, GOLMIE N.LMS predictive link triggering for seamless handovers in heterogeneous wireless networks[C]//Military Communications Conference. Piscataway, NJ:IEEE Press, 2007:1-7.
[14]	赵达, 刘东旭, 孙康文, 等.平流层飞艇研制现状、技术难点及发展趋势[J].航空学报, 2016, 37(1):45-56. http://www.cnki.com.cn/Article/CJFDTOTAL-HKXB201601004.htm ZHAO D, LIU D X, SUN K W, et al.Research status, technical difficulties and development trend of stratospheric airship[J].Acta Aeronautica et Astronautica Sinica, 2016, 37(1):45-56(in Chinese). http://www.cnki.com.cn/Article/CJFDTOTAL-HKXB201601004.htm
[15]	游思晴. 平流层CDMA移动通信蜂窝网的性能研究[D]. 北京: 北京邮电大学, 2012: 56-68. YOU S Q.Porformance research of HAPS-CDMA mobile cellular network[D].Beijing:Beijing University of Posts and Telecommunications, 2012:56-68(in Chinese).