摘要
分析了越区切换造成链路层信息帧丢失重传的原理,描述了遇到越区切换时链路层信息帧的传输过程.其次,分析了影响信息帧传输过程中发生越区切换概率的因素,认为应用层数据长度越长,列车运行速度越高,信息帧传输与越区切换发生碰撞的概率也就越高.最后,分析了影响应用层数据传输延时的因素.
The principle of link layer information frames loss and retransmission caused by GSM-R handover are analyzed, and the information frame transmission process with GSM-R handover is describes. By analyzing the factors which affect the probability of existing GSM-R handover in the information frame transmission process, it is found that if the application layer data length is longer, the higher the train speed is resulted the higher collision probability between the information frame transmission and the GSM-R handover. The factors that affect the transmission delay of application layer data are alse analyzed.
出处
《大连交通大学学报》
CAS
2012年第6期62-66,80,共6页
Journal of Dalian Jiaotong University
基金
国家科技支撑计划资助项目(2009BAG12A08)
关键词
CTCS
GSM—R
越区切换
HDLC
chinese train control system
GSM-R
handover
high-level data link control
