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城市轨道交通DCS系统数据安全传输设计样稿.doc


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摘要
CBTC(Communication Based Train Control,基于通信列车控制)系统利用连续、大容量车地双向可靠数据通信来实现列车控制信息、列车状态信息无线传输,是优异列车自动控制系统。经过CBTC系统能够减小行车间隔,安全、高效、可靠地实现全方位、多功效列车控制,而且即使在发生故障情况下也能够采取备用模式安全运行,从而确保了行车安全,提升了铁路线路利用率。DCS(Digital Communication System,数据通信系统)子系统实现车地之间双向、连续、高速、安全信息交互,承载了直接关系到行车安全关键数据信息,是CBTC系统关键。
论文从CBTC系统和DCS系统发展历程及系统组成入手,对DCS系统轨旁有线骨干网络和车地无线通信网络两大模块进行了具体叙述,对网络组网方法、协议配置、功效和设备性能做了具体描述。提出以采取TCP/IP协议以太网为轨旁骨干网络、以WLAN(Wireless LAN,无线局域网)为车地无线通信网络数据传输系统作为DCS子系统处理方案。
论文对DCS系统可能受到网络安全威胁从两方面进行了叙述,依据DCS系统组网方法和协议结构,提出含有针对性处理方案,并对和网络安全相关频率计划和冗余设计做了简单说明。
关键词:DCS,轨旁骨干网络,车地通信网络,WLAN,安全传输,接入认证
Abstract
The CBTC (Communication Based Train Control) system is an advanced train automatic control system which makes use of bi-directional, big-capacity digital communication between wayside and train, to transfer the information of the status of the train, as well as the controlling information. By using CBTC system, we can reduce the interval between trains achieving high round, multi-train control safely, efficient and reliably. Even in the case of failure, the standby mode may be used for safe operation. Thus, we ensure traffic safety so that improving the utilization of the railway line. The core part of CBTC is DCS (Digital Communication System) subsystem, which achieve two-way, continuous, high-speed, secure information exchange between vehicles and destinations, carring important data information relavant to traffic safety directly.
Starting from development process and system configuration of CBTC system and DCS system, I elaborated two modules including the wired sidings backbone network of DCS system and the wireless communication network between trains and destinations, the composition of the network, configuration requirements, function, and performance of the equipment. We propose a data transmission system, as a solution of DCS subsystem, adopting Ethernet based on TCP/IP protocol as terrestrial backbone network and WLAN (Wireless Local Area Net) as a wireless communication ne

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  • 页数43
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  • 上传人书犹药也
  • 文件大小8.50 MB
  • 时间2020-11-28