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LTE-U在城市轨道交通中的应用研究-修
Research on Application of LTE-U in Urban Rail Transit


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关键词:LTE-U;城市轨道交通;车地无线通信;非授权频谱;长期演进

关键词(英文):LTE-U;urban rail transit; train-ground radio communication; unlicensed spectrum; LTE

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出版年·卷·期(页码):2018·31·第5期()

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-----摘要:-------------------------------------------------------------------------------------------

随着LTE在城市轨道交通中的应用推广,授权频谱资源不足与城市轨道交通车地间数据传输需求的矛盾已制约着车地无线通信系统建设方案的选择。利用非授权频谱实现LTE的LTE-U新兴无线技术有望缓解甚至解决该问题;通过对LTE-U的技术研究,分析了LTE-U在城市轨道交通应用具有的移动和切换性能优异、传输时延小、抗干扰能力强、覆盖半径大、QoS保障好、安全性高、可靠性高等技术优势。通过搭建LTE-U测试网络,在实验室进行了120km/h、140km/h、160km/h典型速度下加载CCTV和PIS业务测试;在80km/h城市轨道交通线路上,采用 A、B冗余组网测试,A网承载CBTC业务,B网综合承载CBTC业务、CCTV业务和PIS业务;在200km/h客运专线上,选择在80~170km/h区间上搭建LTE-U网络加载CCTV和PIS业务测试;测试结果显示,LTE-U具有对城市轨道交通PIS、CCTV、CBTC等业务的承载能力。最后,指出LTE-U在城市轨道交通的应用仍面临诸多挑战,如LAA技术的TAU有待开发、Standalone技术的多载波聚合产品不成熟以及其他非授权频谱产品的竞争等,并最终提出了部署LTE-U建议。



-----英文摘要:---------------------------------------------------------------------------------------

With the application and promotion of LTE in urban rail transit, the contradiction between the shortage of licensed spectrum resources and the data transmission requirements of urban rail transit has restricted the selection of the construction scheme for train-ground radio communication system. However, LTE-U emerging radio technology which use unlicensed spectrum to achieve LTE is expected to mitigate or even solve the problem.In this paper, the technical advantages of LTE-U in urban rail transit are analyzed through the research of LTE-U technology, such as excellent mobility and handoff performance, low transmission delay, high anti-disturbance ability, large coverage radius, flexible deployment, better QoS support, high safety and reliability. By setting up a LTE-U test network, CCTV and PIS service tests were performed in the laboratory at 120 km/h, 140 km/h, and 160 km/h typical speeds; On the urban rail transit line with speed of 80km/h, the redundant network A and B were used to test the ability of A network to carry CBTC service, and the ability of B network to carry CBTC service, CCTV service, and PIS service comprehensively; On the 200km/h-high-speed passenger line, a LTE-U network was built from the speed of 80 to 170km/h to test the ability of loading CCTV and PIS services. The results show that LTE-U has the bearing capacity for PIS, CCTV, and CBTC services in urban rail transit.The paper points out the application of LTE-U in urban rail transit face the challenges such as LAA technology's TAU to be developed,Standalone technology's multi-carrier aggregation products not mature, and incremental competition from other unlicensed spectrum products. Finally some suggestions are put forward.



-----参考文献:---------------------------------------------------------------------------------------


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若需在您的论文中引用此文,请按以下格式著录参考文献:
中文著录格式: .LTE-U在城市轨道交通中的应用研究-修.都市快轨交通,2018,31(5):.
英文著录格式: .Research on Application of LTE-U in Urban Rail Transit.URBAN RAPID RAIL TRANSIT.31(5):.

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