System for monitoring GSM-R wireless frequency spectrum along railway

Abstract

The invention provides a system for monitoring a GSM-R wireless frequency spectrum along a railway. The system is capable of monitoring a change in a frequency spectrum signal in a GSM-R frequency band in real time. When an abnormal case of interference occurs to the frequency spectrum, the system may timely lock an abnormal frequency point, analyzes a channel parameter on the abnormal frequency point, and reports correlative interference data to a background data center in real time. The system comprises front-end wireless monitors and a background data center which are connected through a wireless mobile communication network. The front-end wireless monitors are arranged at equal intervals along a railway and are used for continuously monitoring the changes in the frequency spectrum signal in the GSM-R frequency band and reporting frequency spectrum data to the background data center in real time. The background data center is used for receiving data of the front-end wireless monitors in real time, giving a prompt of correlative interference alarm in real time, and making the front-end wireless monitors carry out frequency locking, frequency sweeping, calling and other application service tests.

Description

technical field [0001] The invention relates to the technical field of railway wireless spectrum monitoring, in particular to a GSM-R wireless spectrum monitoring system along railway lines. Background technique [0002] With the gradual acceleration of China's railway construction, especially high-speed railway construction, the coverage area of ​​GSM-R network is increasing day by day. The normal operation of GSM-R network is a very important guarantee that directly affects the safety and punctuality of the entire railway transportation, which is related to the country. and the safety of people's lives and property. The frequency bands used by my country's railway GSM-R network are 885-889MHZ (uplink) and 930-934MHZ (downlink). This frequency band is shared with the GSM network of China Mobile's public mobile communication system according to the region. The coordinated coverage of the GSM-R network system should be less than 2KM on both sides of the railway, and the coor...

AI Technical Summary

Problems solved by technology

External interference includes GSM base station interference in the public network. GSM-R has the same technical system as public network GSM, and the frequency band is similar, so it is easy to be interfered by a large number of GSM base stations; it also includes interference from G network-related equipment. This type of interference mainly comes from "mobile GSM signal amplifiers. ", "mobile phone signal jammer" and "pseudo base station", these devices cover the frequency band of the GSM-R system, and may cause interference to both uplink and downlink frequencies

External interference also includes C network interference. For example, when the C network base station equipment fails, especially when the repeater fails, the spurious signals generated will interfere with the GSM-R uplink frequency.

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