摘要
无线通信网络是实现铁路行车调度和列车运行控制业务的关键技术之一。目前在用的GSM-R窄带网络在通信容量和性能方面已无法满足日益丰富的铁路运营需求。随着铁路无线通信技术从GSM-R电路交换向GPRS分组交换过渡,ETCS和CTCS列车运行控制系统规范均引入了TCP/IP协议来承载可靠传输服务。文章参考国内外相关标准规范,详细分析GPRS分组交换通信网络对等通信分层结构及车地通信流程,提出基于lwIP开源协议栈的列车运行控制系统车载设备分组交换通信软件设计。该软件具有分层架构和模块化设计,可在不修改原有列车运行控制系统应用软件及安全机制的前提下,仅对其电路交换通信部分进行简单改造即可完成升级,支持列控业务向GPRS分组交换网络的无缝迁移。该通信软件已成功移植到多款自主化列车自动驾驶(ATO,Automatic Train Operation)系统、列车自动防护(ATP,Automatic Train Protection)系统车载硬件平台及国产化操作系统中。
Wireless communication network is one of the key technologies for railway train dispatch and train operation control services.The existing GSM-R narrow band network is no longer able to meet the ever-increasingly diverse needs of railway operation in terms of communication capacity and performance.With the transition of railway wireless communication technology from GSM-R circuit switching to GPRS packet switching,TCP/IP protocols have been included in the specifications of the train control system,ETCS and CTCS,to carry reliable transmission services.Referring to relevant domestic and foreign specifications,this article expounds the peer-to-peer communication layer structure and train ground communication process of GPRS packet switching communication network.A design of the packet switching communication software for the on-board equipment of the train control system based on the open source protocol stack lwIP is proposed,which has a layered architecture and modular design and can be upgraded by simply modifying the circuit switching communication part of the original application software and security mechanism of the train control system without any other modification to achieve seamless migration of train control services to GPRS packet switching network.The communication software has been successfully ported to the onboard hardware platforms of multiple domestic automatic train operation(ATO)systems and automatic train protection(ATP)systems with domestic operating systems.
作者
包正堂
BAO Zhengtang(CRSC Research&Design Institute Group Co.Ltd.,Beijing 100070,China)
出处
《铁路计算机应用》
2023年第12期73-79,共7页
Railway Computer Application
基金
国家重点研发计划(2022YFB4300500)。