Motor train unit key data wireless transmission protection method based on dual-mode navigation system

Abstract

The invention relates to a motor train unit key data wireless transmission protection method based on a dual-mode navigation system, which belongs to the field of a high-speed motor train unit wireless communication protection method. The method comprises the following steps: respectively additionally arranging an AP wireless network and a communication device of a BDS Beidou navigation system for a motor train, respectively transmitting train key data to other motor train units or ground operation dispatching command centers according to bi-directional short messages of a priority sequence of AP wireless network, GPRS network and BDS Beidou navigation system, so that high cost performance and high efficiency of the AP wireless network and the communication advantages of BDS Beidou navigation system can be sufficiently utilized, and the wireless transmission timeliness and reliability of the motor train unit key data can be greatly improved. By adopting the method, data with lower requirement on timeliness is only transmitted by virtue of WIFI of AP wireless network when the motor unit train enters a station or enters a garage, and the data transmission pressure can be alleviated.

Description

technical field [0001] The invention belongs to the field of wireless communication guarantee methods for high-speed train sets, and in particular relates to a guarantee method for wireless transmission of key data of train sets based on a dual-mode navigation system. Background technique [0002] The dynamic information of train orientation based on satellite navigation and positioning is one of the important information to ensure the safe operation of EMUs. In addition to providing services such as precise positioning, speed calculation and train timing for EMUs, the real-time information of the leading and trailing trains can be obtained through satellite positioning. Position information can also determine the speed of the leading car and the trailing car, whether the distance between the two has changed, and whether the running direction and speed are consistent, so as to confirm the integrity of the train in operation. After comprehensively considering the train speed ...

AI Technical Summary

Problems solved by technology

[0042] In order to solve the problem that the existing EMU key data transmission methods rely heavily on wireless mobile networks such as GPRS and its ground base station systems all over the country, once the train is running in an environment without GPRS wireless mobile network signal coverage, it is impossible to transfer any The information is transmitted to other EMUs or the ground operation dispatching command center; at present, the EMUs rely solely on the US GPS positioning system instead of the Chinese Beidou satellite navigation system, and it is impossible to achieve both the US GPS global positioning system and the Beidou satellite navigation system. To meet the development needs of the EMU industry and the technical problem that the mature AP wireless network technology has not been widely used in the field of wireless transmission of EMU key data, the present invention provides a method for ensuring wireless transmission of EMU key data based on a dual-mode navigation system

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