Guarantee method for wireless transmission of key data of EMU based on dual-mode navigation system

Abstract

The key data wireless transmission guarantee method for EMUs based on the dual-mode navigation system belongs to the field of wireless communication guarantee methods for high-speed EMUs. The method can realize the AP wireless network and GPRS by adding the communication equipment of the AP wireless network and the BDS Beidou navigation system to the train respectively. The priority order of the three communication functions of the network and BDS Beidou navigation system two-way short message transmits the key data of the train to other EMUs or the ground operation dispatching command center, giving full play to the high cost performance and efficiency of the AP wireless network and the BDS Beidou navigation The communication advantages of the system have greatly enhanced the timeliness and reliability of wireless transmission of key data of EMUs. In this method, data that does not require high real-time performance is only transmitted through the WIFI of the AP wireless network when the EMU vehicle enters the station or enters the garage for maintenance, which can alleviate the pressure of data transmission.

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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