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真空管道高速飞行列车车地宽带无线通信关键技术的思考
作者:刘留 裘陈成 李铮 韩柏涛 刘叶 周涛 
单位:北京交通大学电子信息工程学院,北京100044
关键词:真空管道高速飞行列车 车地无线通信关键技术 漏波近场耦合 C-RAN 移动小区 
分类号:
出版年·卷·期(页码):2019·41·第1期(65-73)
摘要:

真空管道高速飞行列车(以下简称高速飞行列车)是一种新型轨道交通技术,可实现磁浮列车在接近真空的低压管道内全天候以低机械磨擦、低空气阻力、低噪声模式超高速(超过1 000 km/h)运行。保障高速飞行列车安全运行的关键是列车-地面无线通信系统,一方面,列车运行控制、牵引控制、在途监测等安全类数据需要在车地间实时双向通信,并满足“低延时高可靠”的传输要求;另一方面,需要满足乘客的移动电话、互联网业务等非安全数据通信需求,并满足“大容量高移动”的传输要求。总结高速飞行列车车地无线通信的需求,分析高速飞行列车车地无线通信的特点,针对高速飞行列车无线宽带接入应用场景,研究新型漏波近场耦合、基于云端的集中式无线接入网络(C-RAN)、免切换移动小区等关键技术,探讨一种有效解决超高速移动无线宽带接入的理论与增强技术体系,从而为高速飞行列车的宽带接入提供理论与技术支撑。

The high-speed vacuum pipeline flying train(high-speed flying train) is a novel rail transit technology.The maglev train can run at ultra-high speed(over 1 000 km/h) with low mechanical friction,low air resistance and low noise mode under all-weather conditions in the low-pressure pipeline close to the vacuum.The train-ground wireless communication system plays a key role in guaranteeing the safe operation of the high-speed flying train.On the one hand,the security data for the train operation control,traction control and in-transit monitoring arerequired to transmit between the train and ground real time,to meet the transmission requirements of “low latency and high reliability”.On the other hand,it is necessary to satisfy the non-security data transmission needs for passengers,such as mobile phone and Internet services,to meet the transmission requirements of “high capacity and high mobility”.In this paper,the requirements of the high-speed flying train wireless communication were investigated,and the wireless communication characteristics of high-speed flying train were studied.Based on the wireless broadband access application scenario for the high-speed flying train,the key technologies of novel leaky wave near field coupling,cloud based centralized radio access network(C-RAN) and movingcell were studied.A theoretical and enhanced technical solution for the wireless broadband communication for the high-speed flying train was provided,which is informative to the theory of the broadband wireless communication for the high-speed flying train.

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