LTE-M用于轨道交通CBTC的时延分析  

Delay analysis of LTE-M in rail transit CBTC system

作　　者：张睿[1] 郑国莘[1] 解钧捷 ZHANG Rui;ZHENG Guoxin;XIE Junjie(Key Laboratory of Specialty Fiber Optics and Optical Access Networks,Shanghai University,Shanghai 200444,China)

机构地区：[1]上海大学特种光纤与光接入网省部共建重点实验室,上海200444

出　　处：《上海大学学报（自然科学版）》2019年第2期180-188,共9页Journal of Shanghai University:Natural Science Edition

基　　金：国家自然科学基金重点资助项目(61132003);国家自然科学基金面上资助项目(61571282)

摘　　要：基于通信的列车自动控制(communication based train control, CBTC)系统采用地铁长期演进系统(long term evolution-metro, LTE-M)完成车地之间的数据通信,并限定数据在较低的时延内完成传输.将CBTC系统中列车终端接入基站的通信模型化为排队论体系中的M/M/1/m/m模型,推导LTE-M应用于CBTC时数据传输时延的概率预测方法,并给出满足CBTC需求的相关条件,为LTE-M系统的可靠性设计提供参考.LTE-M system is proposed to be used in the next generation of rail transit communication based train control (CBTC) system to achieved at a communication between the way side and vehicles.Such communications require low delay of data transit. Communication of vehicle terminal accessing the base station is modeled as M/M/1/m/m in the queuing theory.A method is developed to predict probability of data transit delay when LTE-M is used in CBTC.Related conditions are presented to meet the CBTC requirements. This study provides a reference for reliability design of the LTE-M system in the future.

关 键 词：轨道交通 CBTC LTE-M 排队论 通信时延 

分 类 号：TN92[电子电信—通信与信息系统]