摘要
当前大多数基于无线通信的列车控制系统(CBTC)都是基于FAT无线接入点架构的。该系统架构中所有无线接入点(AP)都要承担与通信相关的全部任务,且各无线接入点间相互独立,因此其信道不能得到充分利用。本研究通过引入FIT无线接入点与无线交换技术相结合的思想优化CBTC通信系统架构,降低了无线接入点的通信负载,在此基础上提出了列车车载通信终端在无线接入点之间的快速切换方法和安全认证策略,可有效减少无线接入点切换时延,缩短列车经过的盲区距离,从而提高行车安全。仿真实验结果表明,所提出的方法是可行且有效的。
Most of current communication sub-systems of wireless CBTC（Communication-based Train Control） systems are based on the FAT AP architecture.In such an architecture,AP must perform all tasks related to access and usage,and AP is isolated from each other.Accordingly,the communication channel of this architecture is not utilized efficiently.This paper introduces FIT AP and Wireless Access Controller,which optimize CBTC system architecture and reduce the communication load of AP.Further,a faster handoff method between train communication terminal and different AP is proposed.This method effectively reduces the AP handoff delay,shortens the dead zone the train passing through,and improves traffic safety.The simulation results show that the proposed method is effective and feasible.
出处
《西安理工大学学报》
CAS
北大核心
2012年第4期411-415,共5页
Journal of Xi'an University of Technology
基金
国家自然科学青年基金资助项目(61100173)
陕西省教育厅基金资助项目(11JK1038)
