LTE-M综合承载系统互联互通方案设计和性能测试
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摘要
针对目前城市轨道交通中采用商用公网长期演进(LTE)系统承载时,跨核心网互联互通的可靠性和实时性不满足业务需求的问题,分析了城市轨道交通长期演进(LTE-M)综合承载系统的业务需求,提出了LTE-M综合承载系统互操作性需求和数据业务的互联互通需求,研究了LTE-M综合承载系统互联互通的工作机制,设计了可靠性保障方法,包括核心网间路由重建立、核心网间故障倒切、核心网板卡倒切等,提出了LTE-M综合承载系统互联互通的系统架构;在实验室搭建了LTE-M综合承载系统互联互通测试环境,分析了信令和数据,以验证其是否满足应用需求,并进行了LTE-M综合承载系统跨核心网切换测试、跨核心网路由测试、核心网故障倒切测试、可靠性测试和互联互通性能测试。研究结果表明:为满足城市轨道交通列车跨线运营需求,需实现LTE-M终端和基站之间参考点、核心网服务网关与分组数据网关之间参考点、移动管理实体之间参考点以及归属签约用户服务器与移动管理实体之间参考点接口的互联互通;LTE-M综合承载系统互联互通跨核心网切换时间小于1 s,核心网间路由重建立时间小于1 s,核心网单板故障倒切时间小于2 s,跨核心网故障倒切时间小于31 s;LTE-M综合承载系统互联互通业务传输时延小于0.15 s,丢包率小于1%;10 MHz带宽能同时传输1路100 kb·s~(-1)的基于通信的列车运行控制业务、2路2 Mb·s~(-1)的车辆视频监控业务和1路4 Mb·s~(-1)的乘客信息系统业务。可见,LTE-M综合承载系统互联互通性能满足城市轨道交通跨线运营的业务需求。
For the problem that when the commercial public network of long term evolution(LTE) was used to bear the urban rail transit, the reliability and real-time performance of interoperation crossing core network could not meet the service demands, the service demands of long term evolution for the metro(LTE-M) integrated bearing system were analyzed. The demands of interoperability and the data service connectivity of LTE-M integrated bearing system were put forward. The connectivity operating mechanism of LTE-M integrated bearing system was studied. The method of reliability assurance was designed, including the route reestablishment and failure switch between core networks, and the single plate switch of core network. The interoperation system architecture of LTE-M integrated bearing system was presented. The interoperation test environment for LTE-M integrated bearing system was established in laboratory. The signaling and data were analyzed to verify whether the system meet the application requirements. The hand-off test and route test between core networks, failure switch test of core network, reliability test and interoperability performance test on LTE-M integrated bearing system were conducted. Research result shows that to meet the demands of urban rail trains operating cross-line, it should realize the interoperations among the reference points between LTE-M terminal and base station, between the serving gateway of core network and packet data network gateway, between mobility management entities, and between home subscriber server and mobility management entity. The hand-off time between core networks of LTE-M integrated bearing system is less than 1 s, the route reestablishment time between core networks is less than 1 s, the failure switch time of single plate of core network is less than 2 s, and the failure switch time between core networks is less than 31 s. The transmission delay for LTE-M integrated bearing system interoperability service is less than 0.15 s, and the packet loss rate is less than 1%. When the LTE-M integrated bearing system works at a 10 MHz bandwidth, it can simultaneously transmit one path 100 kb·s~(-1) communication based train control service, two path 2 Mb·s~(-1) closing circuit TV service and one path 4 Mb·s~(-1) passenger information system service. Thus, the interoperation performance of LTE-M integrated bearing system can meet the service demands for the cross-line operation of urban rail transit.
For the problem that when the commercial public network of long term evolution(LTE) was used to bear the urban rail transit, the reliability and real-time performance of interoperation crossing core network could not meet the service demands, the service demands of long term evolution for the metro(LTE-M) integrated bearing system were analyzed. The demands of interoperability and the data service connectivity of LTE-M integrated bearing system were put forward. The connectivity operating mechanism of LTE-M integrated bearing system was studied. The method of reliability assurance was designed, including the route reestablishment and failure switch between core networks, and the single plate switch of core network. The interoperation system architecture of LTE-M integrated bearing system was presented. The interoperation test environment for LTE-M integrated bearing system was established in laboratory. The signaling and data were analyzed to verify whether the system meet the application requirements. The hand-off test and route test between core networks, failure switch test of core network, reliability test and interoperability performance test on LTE-M integrated bearing system were conducted. Research result shows that to meet the demands of urban rail trains operating cross-line, it should realize the interoperations among the reference points between LTE-M terminal and base station, between the serving gateway of core network and packet data network gateway, between mobility management entities, and between home subscriber server and mobility management entity. The hand-off time between core networks of LTE-M integrated bearing system is less than 1 s, the route reestablishment time between core networks is less than 1 s, the failure switch time of single plate of core network is less than 2 s, and the failure switch time between core networks is less than 31 s. The transmission delay for LTE-M integrated bearing system interoperability service is less than 0.15 s, and the packet loss rate is less than 1%. When the LTE-M integrated bearing system works at a 10 MHz bandwidth, it can simultaneously transmit one path 100 kb·s~(-1) communication based train control service, two path 2 Mb·s~(-1) closing circuit TV service and one path 4 Mb·s~(-1) passenger information system service. Thus, the interoperation performance of LTE-M integrated bearing system can meet the service demands for the cross-line operation of urban rail transit.
引文
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[18] WANG Fei, ZHU Li, ZHAO Hong-li. Virtual resource allocation in a network virtualization based integrated train ground communication system[C]//IEEE. The 19th International Conference on Intelligent Transportation Systems (ITSC). New York: IEEE, 2016: 2012-2016.
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[20] ZHAO Hong-li, ZHU Li, JIANG Hai-lin, et al. Design and performance tests in an integrated TD-LTE based train ground communication system[C]∥IEEE. The 17th International Conference on Intelligent Transportation Systems (ITSC). New York: IEEE, 2014: 747-750.
[21] MAHMOOD K, LI X, CHAUDHRY S A, et al. Pairing based anonymous and secure key agreement protocol for smart grid edge computing infrastructure[J]. Future Generation Computer Systems, 2018, 88: 491-500.
[22] LI Song, NI Qiang, SUN Yan-jing, et al. Energy-efficient resource allocation for industrial cyber-physical IoT systems in 5G Era[J]. IEEE Transactions on Industrial Informatics, 2018, 14(6): 2618-2628.
[23] 陈发堂,徐莉.TD-LTE/GSM互操作性测试系统的设计与实现[J].自动化仪表,2014,35(11):76-79.CHEN Fa-tang, XU Li. Design and realization of the TD-LTE/GSM interoperability test system[J]. Process Automation Instrumentation, 2014, 35(11): 76-79. (in Chinese)
[24] 张德民,张有缘,吴中华,等.TD-LTE/GSM 互操作测试平台的设计与实现[J].光通信研究,2015(5):71-74.ZHANG De-min, ZHANG You-yuan, WU Zhong-hua, et al. Design and implementation of TD-LTE/GSM interoperability test platform[J]. Study on Optical Communications, 2015(5): 71-74. (in Chinese)
[25] 王喜军.基于LTE(长期演进)技术的城市轨道交通车地通信方案研究[J].城市轨道交通研究,2016(增2):29-33.WANG Xi-jun. Train-to-ground communication of urban rail transit based on LTE technology[J]. Urban Mass Transit, 2016(S2): 29-33. (in Chinese)
[26] 朱东飞,洪婷.城市轨道交通车地通信综合承载系统(LTE-M)性能测试与分析[J].城市轨道交通研究,2017(5):171-175.ZHU Dong-fei, HONG Ting. Test and analysis of integrated service capacity for train-ground communication based on metro LTE-M system[J]. Urban Mass Transit, 2017(5): 171-175. (in Chinese)
[27] CAO Yuan, MA Lian-chuan, XIAO Shuo, et al. Standard analysis for transfer delay in CTCS-3[J]. Chinese Journal of Electronics, 2017, 26(5): 1057-1063.
[28] 陈赛印.LTE-M综合承载和互联互通测试方法的研究[D].北京:北京交通大学,2017.CHEN Sai-yin.The research on interoperability test of LTE-M system with integrated services[D]. Beijing: Beijing Jiaotong University, 2017. (in Chinese)
[29] TANG Tao, DAI Ke-ping, ZHANG Yan-bing, et al. Field test results analysis in urban rail transit train ground communication systems of integrated service using LTE-M[C]//IEEE. The 19th International Conference on Intelligent Transportation Systems(ITSC). New York: IEEE, 2016: 2017-2021.
[30] 落红卫.互操作性测试方法研究[J].现代电信科技,2008,38(2):37-39,43.LUO Hong-wei. Study on interoperability test method[J]. Modern Science and Technology of Telecommunications, 2008, 38(2): 37-39, 43. (in Chinese)
[2] CAO Yuan, MA Wei-gang, MA Lian-chuan. Local fractional functional method for solving diffusion equations on cantor sets[J]. Abstract and Applied Analysis, 2014, 10.1155/2014/803693.
[3] CAO Yuan, LI Peng, ZHANG Yu-zhuo. Parallel processing algorithm for railway signal fault diagnosis data based on cloud computing[J]. Future Generation Computer Systems, 2018, 88: 279-283.
[4] 石俊刚,杨静,周峰,等.地铁快慢车运行计划综合优化模型[J].交通运输工程学报,2018,18(1):130-138.SHI Jun-gang, YANG Jing, ZHOU Feng, et al. Integrate optimization model of operation schedule for metro express/local train[J]. Journal of Traffic and Transportation Engineering, 2018, 18(1): 130-138. (in Chinese)
[5] ZHAO Hong-li, CAO Yuan, ZHU Li, et al. Integrated train ground radio communication system based TD-LTE[J]. Chinese Journal of Electronics, 2016, 25(4): 740-745.
[6] ZHAO Hong-li, JIANG Hai-lin. LTE-M system performance of integrated services based on field test results[C]//IEEE. Advanced Information Management, Communicates, Electronic and Automation Control Conference. New York: IEEE, 2016: 2016-2021.
[7] T/CAMET 04005.1—2018,城市轨道交通车地综合通信系统(LTE-M)总体规范第1部分:系统需求[S].T/CAMET 04005.1—2018, long term evolution for metro (LTE-M) generic specification part 1: system requirement[S]. (in Chinese)
[8] T/CAMET 04005.2—2018,城市轨道交通车地综合通信系统(LTE-M)总体规范第2部分:系统总体架构及系统功能[S].T/CAMET 04005.2—2018, long term evolution for metro (LTE-M) generic specification part 2: general system architecture and function[S]. (in Chinese)
[9] 郭玉华.借鉴ETCS完善CTCS技术规范体系的研究[J].铁道标准设计,2016,60(10):136-140.GUO Yu-hua. Perfecting CTCS technical specifications with reference to ETCS[J]. Railway Standard Design, 2016, 60(10): 136-140.
[10] 汪洋.城际铁路C2+ATO互联互通测试关键技术研究[J].铁道标准设计,2016,60(10):132-135.WANG Yang. Research on key technologies in interoperability test of C2+ATO train control system of intercity railway[J]. Railway Standard Design, 2016, 60(10): 132-135. (in Chinese)
[11] 金世杰,郜春海.城轨交通信号系统资源共享与互联互通[J].都市快轨交通,2007,20(2):92-95.JIN Shi-jie, GAO Chun-hai. Resource sharing and interoperability of signaling system in urban rail transit[J]. Urban Rapid Rail Transit, 2007, 20(2): 92-95. (in Chinese)
[12] 朱翔.实现基于通信的列车控制互联互通的若干思考[J].城市轨道交通研究,2006(9):6-8.ZHU Xiang. How to put the CBTC interoperability system into practice[J]. Urban Mass Transit, 2006(9): 6-8. (in Chinese)
[13] 秦小虎.城市轨道交通互联互通CBTC系统验证平台研究[J].科技创新与应用,2015(34):68.QIN Xiao-hu. Research on verification platform of CBTC system for interconnection of urban rail transit[J]. Technology Innovation and Application, 2015(34): 68. (in Chinese)
[14] 刘雨,唐涛,李开成,等.CTCS-3级列控车载设备实验室互联互通测试方法[J].铁道通信信号,2011,47(12):4-7.LIU Yu, TANG Tao, LI Kai-cheng, et al. Interconnection and interoperability test methods of onboard CTCS-3 level train control equipment in laboratory[J]. Railway Signalling and Communication, 2011, 47(12): 4-7. (in Chinese)
[15] 丁建文,杨焱,钟章队.浅析铁路GSM-R系统互联互通及测试[J].移动通信,2007(9):52-55.DING Jian-wen, YANG Yan, ZHONG Zhang-dui.Interconnection and test on railway GSM-R system[J]. Mobile Communications, 2007(9): 52-55. (in Chinese)
[16] 于超,郑生全,石文静.城市轨道交通CBTC系统互联互通方案研究[J].铁道通信信号,2010,46(1):44-47.YU Chao, ZHENG Sheng-quan, SHI Wen-jing. Research on interconnection scheme of CBTC system in urban rail transit[J]. Railway Signalling and Communication, 2010, 46(1): 44-47. (in Chinese)
[17] 段綦,孙章,徐金祥.基于无线通信的列车控制技术与互联互通[J].城市轨道交通研究,2004(1):10-12.DUAN Qi, SUN Zhang, XU Jin-xiang. Inter-operability on radio CBTC technology[J]. Urban Mass Transit, 2004(1):10-12. (in Chinese)
[18] WANG Fei, ZHU Li, ZHAO Hong-li. Virtual resource allocation in a network virtualization based integrated train ground communication system[C]//IEEE. The 19th International Conference on Intelligent Transportation Systems (ITSC). New York: IEEE, 2016: 2012-2016.
[19] WANG Xiao-xuan, JIANG Hai-lin, SUN Wen-zhe, et al. Efficient dual-association resource allocation model of train-ground communication system based on TD-LTE in urban rail transit[C]∥IEEE. The 19th International Conference on Intelligent Transportation Systems (ITSC). New York: IEEE, 2016: 2006-2011.
[20] ZHAO Hong-li, ZHU Li, JIANG Hai-lin, et al. Design and performance tests in an integrated TD-LTE based train ground communication system[C]∥IEEE. The 17th International Conference on Intelligent Transportation Systems (ITSC). New York: IEEE, 2014: 747-750.
[21] MAHMOOD K, LI X, CHAUDHRY S A, et al. Pairing based anonymous and secure key agreement protocol for smart grid edge computing infrastructure[J]. Future Generation Computer Systems, 2018, 88: 491-500.
[22] LI Song, NI Qiang, SUN Yan-jing, et al. Energy-efficient resource allocation for industrial cyber-physical IoT systems in 5G Era[J]. IEEE Transactions on Industrial Informatics, 2018, 14(6): 2618-2628.
[23] 陈发堂,徐莉.TD-LTE/GSM互操作性测试系统的设计与实现[J].自动化仪表,2014,35(11):76-79.CHEN Fa-tang, XU Li. Design and realization of the TD-LTE/GSM interoperability test system[J]. Process Automation Instrumentation, 2014, 35(11): 76-79. (in Chinese)
[24] 张德民,张有缘,吴中华,等.TD-LTE/GSM 互操作测试平台的设计与实现[J].光通信研究,2015(5):71-74.ZHANG De-min, ZHANG You-yuan, WU Zhong-hua, et al. Design and implementation of TD-LTE/GSM interoperability test platform[J]. Study on Optical Communications, 2015(5): 71-74. (in Chinese)
[25] 王喜军.基于LTE(长期演进)技术的城市轨道交通车地通信方案研究[J].城市轨道交通研究,2016(增2):29-33.WANG Xi-jun. Train-to-ground communication of urban rail transit based on LTE technology[J]. Urban Mass Transit, 2016(S2): 29-33. (in Chinese)
[26] 朱东飞,洪婷.城市轨道交通车地通信综合承载系统(LTE-M)性能测试与分析[J].城市轨道交通研究,2017(5):171-175.ZHU Dong-fei, HONG Ting. Test and analysis of integrated service capacity for train-ground communication based on metro LTE-M system[J]. Urban Mass Transit, 2017(5): 171-175. (in Chinese)
[27] CAO Yuan, MA Lian-chuan, XIAO Shuo, et al. Standard analysis for transfer delay in CTCS-3[J]. Chinese Journal of Electronics, 2017, 26(5): 1057-1063.
[28] 陈赛印.LTE-M综合承载和互联互通测试方法的研究[D].北京:北京交通大学,2017.CHEN Sai-yin.The research on interoperability test of LTE-M system with integrated services[D]. Beijing: Beijing Jiaotong University, 2017. (in Chinese)
[29] TANG Tao, DAI Ke-ping, ZHANG Yan-bing, et al. Field test results analysis in urban rail transit train ground communication systems of integrated service using LTE-M[C]//IEEE. The 19th International Conference on Intelligent Transportation Systems(ITSC). New York: IEEE, 2016: 2017-2021.
[30] 落红卫.互操作性测试方法研究[J].现代电信科技,2008,38(2):37-39,43.LUO Hong-wei. Study on interoperability test method[J]. Modern Science and Technology of Telecommunications, 2008, 38(2): 37-39, 43. (in Chinese)