| 基于RFCS的城轨列车无线视频监控统切换机制 |
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| 引用本文： | 李琳,陈少华,刘伟,于毅. 基于RFCS的城轨列车无线视频监控统切换机制[J]. 大连铁道学院学报, 2013, 0(6): 93-97 |
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| 作者姓名： | 李琳 陈少华 刘伟 于毅 |
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| 作者单位： | 大连交通大学电气信息学院,辽宁大连116028 |
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| 基金项目： | 大连市科学技术基金资助项目（2012J21DW005） |
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| 摘 要： | 针对城轨列车跨越多个无线接入点AP高速运行时存在切换延迟的问题,在对城轨列车无线视频监控系统研究的基础上,提出一种RFCS（RF channel switched）机制,在这种机制下,无线接入点AP按照预定的顺序周期性的改变RF信道来防止相邻AP信道的重叠,从而减小了切换延迟,增大了网络吞吐量,最终实现无缝切换.并用NS2仿真软件对该方案进行仿真,与传统的切换过程相比,该方案明显减小了切换时延,保证了城轨列车无线视频监控系统的实时性.
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| 关 键 词： | WLAN 视频监控 切换延迟 RFCS机制 无缝切换 |
RFCS-Based Handover Scheme in Train Wireless Video Surveillance System |
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| LI LinSchool of Electrical and Information Engineering,Dalian Jiaotong University,Dalian,China CHEN Shao-huaSchool of Electrical and Information Engineering,Dalian Jiaotong University,Dalian,China LIU WeiSchool of Electrical and Information Engineering,Dalian Jiaotong University,Dalian,China YU Yi. RFCS-Based Handover Scheme in Train Wireless Video Surveillance System[J]. Journal of Dalian Railway Institute, 2013, 0(6): 93-97 |
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| Authors: | LI LinSchool of Electrical Information Engineering Dalian Jiaotong University Dalian China CHEN Shao-huaSchool of Electrical Information Engineering Dalian Jiaotong University Dalian China LIU WeiSchool of Electrical Information Engineering Dalian Jiaotong University Dalian China YU Yi |
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| Affiliation: | LI Lin(School of Electrical and Information Engineering, Dalian Jiaotong University, Dalian 116028, China) CHEN Shao-hua(School of Electrical and Information Engineering, Dalian Jiaotong University, Dalian 116028, China) LIU Wei(School of Electrical and Information Engineering, Dalian Jiaotong University, Dalian 116028, China) YU Yi(School of Electrical and Information Engineering, Dalian Jiaotong University, Dalian 116028, China) |
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| Abstract: | To solve the problem of handover latency with trains running across multiple AP,a RFCS （RF channel switched） mechanism is proposed on the basis of study on the train wireless video surveillance system,where AP periodically changes its RF channels in a predetermined order that prevents overlap of neighboring AP channels to reduce handover latency and improve the throughput to achieve the seamless switching.Finally the scheme is emulated with software NS2 and compared with the traditional switching process.The resuts show that the scheme obviously reduces the handover latency to ensure the real-time monitor in train wireless video surveillance system. |
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| Keywords: | WLAN video surveillance handover latency RFCS mechanism seamless switching |
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