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介绍了铁路集群移动通信网的网络构成、网络功能、工作方式及信令方式等等，指出了集群移动通信系统是一种新型的调度信息系统，已在铁路公务通信网中大量使用。
The network structure, network functions, working methods and signaling methods of railway trunking mobile communication network are introduced. It is pointed out that trunking mobile communication system is a new type of scheduling information system and has been widely used in railway official communications network.