The Study Of Influence Of GSM-R Network QoS On Chinese Train Control System Level-3

GSM-R communication network is the second special railway digital mobile communication system, which based on the mature technology of GSM network .Based on GSM protocol specification, the system add position addressing and functional addressing and other functions to meet the needs of railway dispatching communication. CTCS-3 is one of the most important services of GSM-R communication network, and the important data such as Temporary Speed Restriction and Movement Authority, are sent to the train from RBC through GSM-R network. QoS of GSM-R communication network may have a variety of impact on the CTCS-3 train control system, such as data error, packet loss, wireless connection timeout. It is an important factor affecting the safe operation of CTCS-3 train control system.This paper first analyzes the evaluation system of GSM-R network service quality, and systematically studies the evaluation methods of GSM-R network performance indicators, business application quality, service quality, field strength coverage and other key technical indicators. On this basis, This thesis mainly studies on the effect of GSM-R network service quality to the CTCS-3 train control system,explore GSM-R network performance monitoring and the implementation of CTCS-3 train control system wireless connection timeout fault.ln order to predict and prevent the CTCS-3 train control service wireless connection timeout fault,enhancing the stability of the GSM-R communication system reliability and CTCS-3 train control service.Finally, this paper in-depth analysis of the Xi'an Railway Bureau CTCS-3 train control service wireless timeout case, combined with the statistical index of GSM-R network performance and GSM-R network interface monitoring data, analysis of the application of controlled wireless connection timeout warning technology in the maintenance of GSM-R network CTCS-3.