在二十世纪，地铁/轻轨无线通信系统作为运输与通信高度结合的产物，并且逐渐成为地铁、轻轨运营的关键和重要组成部分，凭借通信系统可以提高运输效率，同时可以保证行车的安全性。对于地铁/轻轨无线通信系统来说，其组成主要包括：无线集群通信、光纤传输、中继器加漏泄同轴电缆传输、无线寻呼引入，以及蜂窝电话引入等子系统。从隶属关系来看，地铁/轻轨无线通信可以划归为移动通信范畴，同时具有限定空间、限定场强覆盖范围、技术要求高、专用性强等特点。%The wireless communication system of metro and light rail is a product of the highly integration of transport and communication in the 20th century, and it has gradually become the key and the important part of the operation of metro and light rail. With communication system, it can improve the efficiency of transportation and guarantee the safety of driving. The wireless communication system of metro and light rail mainly includes wireless communications, optical fiber transmission, coaxial cable transmission of the refueling, spilling and drainage of the repeater, wireless paging import, cell phone import and other subsystems. In the view of membership function, metro and light rail wireless communication can be characterized as mobile communication, at the same time, it has many characteristics, such as definitive space, definitive coverage area of field intensity range, high technical requirements, high specificity and so on.
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