GSM-R越区切换与链路层信息帧传输的分析  

Analysis and Study of GSM-R Handover and Link Layer Information Frame Transmission

作　　者：张友兵[1] 耿鹏[1] 王猛[1] 

机构地区：[1]北京全路通信信号研究设计院有限公司,北京100073

出　　处：《大连交通大学学报》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)

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.

关 键 词：CTCS GSM—R 越区切换 HDLC 

分 类 号：U285[交通运输工程—交通信息工程及控制]