基于WLAN的车-地传输技术在PSD系统中应用的可靠性研究

摘要

WLAN is one of the most advanced technologies for rail transportation information systems.Based on the design of train-wayside data transmission system for vital platform screen door in Shanghai metro line 2,this paper mainly discussed the reliability design of the system and especially addressed how to improve the reliability of upper layer services data in wireless communication link when train-borne mobile radio sets switching over different wayside APs.%WLAN是轨道交通信息化技术中最先进的技术之一。结合上海地铁2号线安全PSD（站台屏蔽门）车-地数据传输系统设计方案,重点论述了系统的可靠性设计,特别是车载MR（移动电台）在不同轨旁AP之间切换时,如何提高上层业务信息在无线通信链路传输环节的可靠性。