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

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.