基于5.9GHz的TD-LTE的城市轨道交通通信系统测试研究

Field Test of Urban Rail Transit Train-Wayside Communication Based on 5.9 GHz TD-LTE

为解决现有城市轨道交通车-地通信系统在2.4GHz频段的同频干扰、高速适应性差以及多种业务的综合承载问题,北京地铁建设管理有限公司和北京交通大学、北京全路通信信号研究设计院以及华为公司在北京国家环形铁道试验线进行了基于5.9GHz的TD-LTE的城市轨道交通通信系统现场测试研究。测试中车-地通信的传输媒介包括漏泄波导和无线自由波,承载的业务包括CBTC、PIS、CCTV和列车运行状态监测业务。测试结果表明:5.9GHz漏泄波导的传播特性优于无线自由波,所测试的TD-LTE系统在承载综合业务时,能保证CBTC业务的业务质量。

Some problems in the existing urban rail transit communication system,such as the co-channel inter-ference in the 2.4 GHz frequency band,poor adaptability to high speed train ground communication and the transmission of integrated services in a single radio access network.A field test of the urban rail communication system based on the 5.9 GHz TD-LTE system has been undertaken by Beijing MTR Construction Administra-tion Corporation,Beijing Jiaotong University,Beijing National Railway Research Design Institute of Signal＆amp; Communication Co.,Ltd.and Huawei Technology Co.,Ltd.During the test,the transmission media be-tween the train and ground are leaky waveguides and wireless free wave.The services in the test include CBTC,PIS,CCTV and Train Operation State Monitoring.The test results showed that the transmission char-acteristics via the 5.9 GHz leaky waveguides were better than the free wireless wave.The TD-LTE radio net-work tested can ensure the service quality of CBTC when carrying the integrated services.