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首先分析了基于通信的列车控制(Communication Based Train Control,CBTC)系统移动数据通信的现状、特点、要求;然后分析了无线数据平台使用的技术:直接序列扩频、全双工、时分复用多址、码分复用多址、差错控制、移动性管理、数据通信协议;最后分析了CBTC信息内容和数据安全传输方法。
Firstly, the status quo, characteristics and requirements of mobile communication based on Communication Based Train Control (CBTC) system are analyzed. Then the technologies used in wireless data platform are analyzed: direct sequence spread spectrum, full duplex, time division multiplexing Address, code division multiple access multiple access, error control, mobility management, data communication protocol; finally analyzed the CBTC information content and data security transmission method.