| 一种支持车-地宽带互联的WiFi移动应用优化方案 |
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| 引用本文： | 邹复民,蒋新华,王桐森,林漳希. 一种支持车-地宽带互联的WiFi移动应用优化方案[J]. 铁道学报, 2011, 33(4): 59-65. DOI: 10.3969/j.issn.1001-8360.2011.04.009 |
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| 作者姓名： | 邹复民 蒋新华 王桐森 林漳希 |
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| 作者单位： | 1. 福建工程学院下一代互联网应用技术研究中心,福建,福州,350108
2. 得克萨斯理工大学,商学院,Lubbock,TX,79409-2101 |
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| 基金项目： | 福州市高校院所合作平台项目，福建省高等学校杰出青年科研人才培育计划 |
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| 摘 要： | 本文研究如何改进WiFi协议及其算法以优化其移动应用性能,从而支持不间断的旅客列车车-地宽带互联。为此,本文首先探讨并建立802.11a移动应用的系统模型,然后基于802.11a移动应用仿真系统深入分析802.11a移动应用在不同多径传输、不同移动速度和不同信噪比条件下的性能,并通过不同的系统配置,研究不同数据帧长、不同发送速率对802.11a移动应用性能的影响。研究发现,802.11a在受限的多径传输环境下可以支持移动应用,但信道估计周期不能超过信道的相干时间,并且6 Mbit/s1、2 Mbit/s和24 Mbit/s这3种发送速率更适合于移动应用。最后针对旅客列车车-地宽带互联,提出WiFi移动应用方案TGI@11a,不仅将802.11a移动应用的误码率由高于5‰下降到低于0.4‰,同时将有效发送速率由最高6 Mbit/s提高到20 Mbit/s。
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| 关 键 词： | 车-地互联 WiFi 移动宽带 TGI@11a |
WiFi-based Optimized Scheme for Broadband Train-ground Internetworking |
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| ZOU Fu-min,JIANG Xin-hua,WANG Tong-sen,LIN Zhang-xi. WiFi-based Optimized Scheme for Broadband Train-ground Internetworking[J]. Journal of the China railway Society, 2011, 33(4): 59-65. DOI: 10.3969/j.issn.1001-8360.2011.04.009 |
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| Authors: | ZOU Fu-min JIANG Xin-hua WANG Tong-sen LIN Zhang-xi |
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| Affiliation: | ZOU Fu-min1,JIANG Xin-hua1,WANG Tong-sen1,LIN Zhang-xi2(1.Research Center for Next-Generation Internet Tech & Apps,Fujian University of Technology,Fuzhou 350108,China,2.School of Business Administration,Texas Tech University,Lubbock,TX 79409,USA) |
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| Abstract: | An optimized scheme is studied for WiFi application in broadband train-ground internetworking.WiFi used not to be aimed at mobile applications in design.The 802.11a system model for mobile access is built up,and its performance in different multi-path propagation,and at different moving speeds and different signal-to-noise rates is analyzed.The influence of different frame durations and different transmitting bit rates on 802.11a system performance is studied with different system configurations.Simulation ... |
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| Keywords: | train-ground internetworking WiFi mobile broadband TGI@11a |
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