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Method, device and system for transmitting messages

A technology for message and sending message, applied in the direction of frequency modulation carrier system, etc., can solve the problem of increasing deployment cost, and achieve the effect of improving information transmission capacity

Active Publication Date: 2014-12-17
SIEMENS SIGNALLING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in order to cover the entire railway, a large number of transponders need to be deployed along the route, which significantly increases the cost of deployment

Method used

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  • Method, device and system for transmitting messages
  • Method, device and system for transmitting messages
  • Method, device and system for transmitting messages

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Embodiment Construction

[0080] In order to make the technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to illustrate the present invention, and are not used to limit the protection scope of the present invention.

[0081] In the embodiment of the present invention, the multi-ary CPFSK technology is used as the information modulation scheme of the message information between the transponder and the vehicle-mounted reader, which can improve the information transmission performance, and does not need to make major changes to the current hardware, and also Compatible with existing transponder systems without significant electromagnetic compatibility issues.

[0082] figure 2 It is a flowchart of a method for sending message information according to an embodiment of the present i...

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Abstract

An embodiment of the invention discloses a method, a device and a system for transmitting messages to a train. The method includes the steps of acquiring message bits of N messages, mapping the massage bits of the N messages into a symbol sequence according to a preset mapping mode of the train, and converting the symbol sequence into a frequency-shift keying baseband waveform; modulating the frequency-shift keying baseband waveform into M radio frequency waveforms, with M equal to 2N and N being a natural number not less than 2, according to a M-ary continuous phase frequency-shift keying modulation mode; transmitting the M radio frequency waveforms to the train. The method, the device and the system have the advantages that multiple messages can be mapped to one symbol sequence, modulation is performed in the multi-level continuous phase frequency-shift keying modulation mode, message transmission capacity can be increased, and the method is well compatible with the prior binary continuous phase frequency-shift keying modulation modes.

Description

technical field [0001] The invention relates to the technical field of rail transit communication, in particular to a method, device and system for transmitting message information. Background technique [0002] Transponders are of great significance to ensure train safety. It is a transmission device that can send message information to the vehicle subsystem. When the train passes the ground transponder, after the transponder receives the electromagnetic energy sent by the point-type information receiving antenna of the train control vehicle equipment, the transponder converts the electromagnetic energy into a working power supply, starts the electronic circuit to work, and sends out the message information in a loop until Electricity disappears. The on board interrogator on the train reads the message information and uses the message information to guide the train to run. [0003] figure 1 It is a structural diagram of a Eurobalise system in the prior art. [0004] li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/12H04L27/14
Inventor 魏力朱卫华韩锐陈立袁勇喻丹
Owner SIEMENS SIGNALLING
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