TD-LTE在有轨电车工程中的应用研究

对比LTE与WLAN在通信频率、覆盖范围以及抗干扰等方面的技术特点,阐述LTE在有轨电车车地无线通信应用的合理性,指出LTE在有轨电车发展中具有广泛应用的可行性;通过分析有轨电车的运营调度、售检票、乘客信息、广播、视频监控、列车状态监测等综合业务需求,给出有轨电车各业务的带宽需求和性能需求,并根据不同的业务需求分配合理的上下行设计能力。以武汉有轨电车车都T1线为例,全线采用LTE宽带无线集群通信系统网络进行无线信号覆盖,实现车地无线语音通信、数据传输及控制中心的录音功能。采用专用测试软件模拟业务数据测试系统带宽和丢包率,测试结果以及项目试运行的效果表明,采用LTE车地无线通信系统在稳定性、安全性、抗干扰性等方面表现突出,指标满足多样化业务承载和系统高可靠性要求,系统运行流畅,为未来有轨电车的通信发展提供参考依据。

Application of TD-LTE System in the Tram Project

This study provides reasonability for the use of LTE in train-ground communications of tram by comparing the technical characteristics of LTE and WLAN in terms of the communication frequency, coverage, anti-interference, and other aspects. The comprehensive tram business needs of tram dispatching, automatic fare collection, passenger information, video monitoring, and train condition monitoring are analyzed and the requirements of each business on bandwidth and performance are presented. It also allocates an up-and-down design capability according to different situations. In the Wuhan tram line T1, the LTE broadband wireless communication system network is used for wireless signal coverage to realize voice recording, data transmission, and control center recording functions. The system data bandwidth and the packet loss rate are simulated using special test software. The test results showed that LTE has an outstanding performance in stability, security, and anti-interference. The index satisfies the diverse requirements of high reliability. The system runs smoothly, thereby providing a reference for tram communications in the future.