摘要
为提高频率使用率,公网运营商开始将铁路沿线900 MHz GSM系统升级为LTE-FDD系统。为研究900 MHz频段LTE-FDD系统部署对铁路GSM-R系统产生的影响,在实验室搭建了仿真环境,并按照检测标准和维护标准对GSM-R系统承载的语音业务、列车控制类数据业务和通用分组无线服务的服务质量指标分别进行测试。测试结果表明:(1)在不发生切换和重选时,900 MHz LTE-FDD系统对GSM-R系统的语音及非列车运行控制类数据业务、分组交换数据业务无明显影响;(2)在935~945 MHz频段布置LTE-FDD系统可能会对GSM-R系统的列车运行控制类数据业务产生负面影响,导致传输干扰时间变长、传输无差错时间变短;(3)当GSM-R系统与LTE-FDD系统保护频带>11 MHz时,不会对GSM-R网络服务质量造成影响。
In order to improve the frequency efficiency,public mobile network operators began to upgrade the 900MHz GSM system to LTE-FDD system along the railway.To study the influence of 900 MHz LTE-FDD system deployment on the GSM-R system,a simulation environment is set up in the laboratory.According to the inspection standard and maintenance standard,the service quality indexes of voice service,train operation control service data service and general packet radio service carried by GSM-R system are tested.The results show that:(1)900 MHz LTE-FDD system has no significant influence on the voice service and GPRS of GSM-R system under the condition of no cell switching and no cell reselection;(2)The arrangement of 935~945 MHz LTE-FDD system may have a negative impact on the train operation control data service of GSM-R system,resulting in longer time of transmission interference and shorter time of recovery;(3)When the protection band of GSM-R system and LTE-FDD system is more than 11mhz,It will not affect the service quality of GSM-R network.
作者
孟景辉
赵波
杨树忠
林思雨
MENG Jinghui;ZHAO Bo;YANG Shuzhong;LIN Siyu(Infrastructure Inspection Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Department of Track,Communication&Signaling and Power Supply,China State Railway Group Co.,Ltd.,Beijing 100844,China;School of Electronic and Information Engineering,Beijing Jiaotong University,Beijing 100044,China)
出处
《铁道标准设计》
北大核心
2021年第9期172-176,共5页
Railway Standard Design
基金
中国国家铁路集团有限公司科技研究计划-系统性重大课题(P2018G002)。
作者简介
孟景辉(1984-),男,高级工程师,2008年毕业于北京交通大学控制理论与控制工程专业,工学硕士,主要从事铁路通信信号动态检测技术研究及数据分析工作,E-mail:mengjh@rails.com。
