A detection system and method for a rail transit vehicle-ground communication system

Abstract

The invention provides a detection system and method for a rail transit vehicle-ground communication system. The detection system comprises an LTE-M vehicular detection device and an LTE-M ground detection device. According to the LTE-M vehicular detection device, vehicle position information collected by a VOBC subsystem is obtained in real time; working state information of a vehicular device, and RSRP and SINR values of a ground LTE-M network are obtained every other preset distance; whether the RSRP and SINR values are in preset normal ranges or not is judged; if the RSRP and SINR values are not in the preset normal ranges, the RSRP and SINR values are marked as abnormal RSRP and SINR values; and a current time date, an abnormal judgment result, the RSRP and SINR values, the vehicle position information and the working state information are packaged into a data packet, and the data packet is sent to the LTE-M ground detection device. According to the LTE-M ground detection device,the data packet is analyzed; the serious degree that the RSRP and SINR values deviate from normal values is judged according to preset rules; and positions / sections of the abnormal RSRP and SINR values and the judged serious degree are displayed according to the vehicle position information and a CBTC route electronic map system. When the RSRP and SINR values are abnormal, the position of the ground LTE-M network in which a problem occurs can be positioned rapidly and accurately, and the efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of rail transit, and in particular relates to a detection system and method for a rail transit vehicle-ground communication system. Background technique [0002] At present, according to the LTE-M (Urban Rail Transit Vehicle-Ground Integrated Communication System) and CBTC (Communication-Based Train Control) system vehicle interface specifications, it is required that: (1) LTE-M vehicle equipment should be able to provide the working status information required by CBTC vehicle equipment , to cooperate with CBTC on-board equipment to complete train self-inspection. (2) The LTE-M on-board equipment should transmit the received RSRP (reference signal received power) and SINR (signal-to-dry ratio) values ​​of the terrestrial LTE-M network to the CBTC on-board equipment or maintenance management equipment. (3) The interface between LTE-M vehicle-mounted equipment and CBTC vehicle-mounted equipment should have a ...

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Problems solved by technology

[0003] However, the current CBTC vehicle-mounted equipment will display or record the RSRP and SINR values ​​of the terrestrial LTE-M network received by the LTE-M vehicle-mounted equipment, but will not actively report whether the RSRP and SINR values ​​are normal. During data playback analysis, it is impossible to display the RSRP and SINR values ​​on the track, and it is difficult to quickly locate the exact location of the problematic ground LTE-M network when the RSRP and SINR values ​​are abnormal. Difficulty in detecting problems and low efficiency

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