Railway train dispatching four-wire access equipment and implementation method

Abstract

The invention discloses railway train dispatching four-wire access equipment and an implementation method. The device comprises a first network transformer, a second network transformer, an audio coding and decoding chip, a modular connector, a PHY chip and a processor chip. The equipment is connected with a plurality of 450M analog train dispatching station radio stations through four-wire interfaces, and is connected with a digital train dispatching communication system central server through an Ethernet interface, so that the traditional 450M analog train dispatching station radio stations can be accessed to a digital train dispatching communication system, and dispatching communication and network management monitoring of the digital train dispatching system and the 450M analog train dispatching station radio stations are realized; a technical means is provided for upgrading transition compatibility of a railway wireless train dispatching system, and the method has important significance for guaranteeing railway train operation safety and improving transportation operation efficiency.

Description

Technical Field

[0001] The present invention relates to a railway wireless train dispatching system, and in particular to a railway train dispatching four-wire access device and implementation method capable of connecting a traditional 450M analog train dispatching station radio station to a digital wireless train dispatching communication system, and realizing dispatching communication and network management monitoring between the digital train dispatching system and the 450M analog train dispatching station radio station. Background Art

[0002] With the development of wireless intercom communication technology, the railway wireless train dispatching system will adopt a digital train dispatching system to replace the traditional 450M analog train dispatching system. Due to the complexity of railway communication equipment management and the national railway lines and locomotive operation dispatching, the upgrade and replacement process of the dispatching communication equipment will have a long transition period. During this period, the 450M analog train dispatching station radio and the digital train dispatching system will coexist. This requires the traditional 450M analog train dispatching station radio to be connected to the digital train dispatching system, and the digital train dispatching system and the 450M analog train dispatching station radio are used for dispatching communication and network management monitoring. However, the dispatching communication and network management monitoring communication of the 450M analog train dispatching station radio are four-wire interfaces, and the communication interface of the digital train dispatching center server is an Ethernet interface, and the communication protocols used are also different. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides a railway train dispatching four-wire access device and implementation method. The purpose of the present invention is to connect the traditional 450M analog train dispatching station radio to the digital train dispatching communication system, and realize dispatching communication and network management monitoring through the digital train dispatching system and the 450M analog train dispatching station radio.

[0004] The technical solution adopted by the present invention is: a railway train dispatching four-line access device includes a first network transformer and a second network transformer, both of which are model VT-36003, an audio codec chip with a model TLV320AIC3104, a modular connector with a model HR911105A, a PHY chip with a model DAP8211R and a processor chip with a model MIMXRT1021CAG4B.

[0005] Pin 9 of the first network transformer is connected to the four-wire input +, pin 7 is connected to the four-wire input -, pin 2 is connected to the audio codec chip LINE1P pin, and pin 4 is connected to the audio codec chip LINE1M pin; pin 2 of the second network transformer is connected to the four-wire output +, pin 4 is connected to the four-wire output -, pin 9 is connected to the audio codec chip HPCOM pin, and pin 7 is connected to the audio codec chip HPOUT pin; the UTP end of the modular connector is connected to the digital modulation center server, and the CHIP end is connected to the PDM end of the PHY chip; the I2S interface of the processor chip is connected to the I2S interface of the audio codec chip, the I2C interface is connected to the I2C interface of the audio codec chip, and the RMII interface is connected to the MAC end of the PHY chip.

[0006] The method for implementing the railway train dispatching four-wire access device includes the communication process from a 450M analog train dispatching station radio to a digital train dispatching center server and the communication process from a digital train dispatching center server to a 450M analog train dispatching station radio.

[0007] The communication process from the 450M analog train modulation station radio to the digital train modulation center server performs the following operations: A1. The railway train dispatching four-wire access device transmits the received four-wire input analog signal to the audio codec chip through the first network transformer, converts the digital data into digital data through the audio codec chip and transmits it to the processor chip, and analyzes and processes the digital data through the processor chip to determine whether the digital data is signaling or control data.

[0008] A2. If the digitized data is signaling or control data, the signaling or control data is converted into digital train dispatching system communication protocol data, and then transmitted to the digital train dispatching center server via Ethernet.

[0009] A3. If the digitized data is not signaling or control data, the digitized data is converted into RTP voice stream data and then transmitted to the digital modulation center server via Ethernet.

[0010] The communication process from the digital train modulation center server to the 450M analog train modulation station radio station performs the following operations: B1. The railway train dispatching four-wire access device receives the Ethernet data sent by the digital train dispatching center server via Ethernet and transmits it to the processor chip through the modular connector and the PHY chip. The processor chip analyzes and processes the Ethernet data to determine whether the Ethernet data is signaling or control data.

[0011] B2. If the Ethernet data is signaling or control data, the signaling or control data is converted into 450M analog modulation system communication protocol data, and then converted into digital frequency modulation data and transmitted to the audio codec chip, converted into an analog signal by the audio codec chip, and outputted as a four-wire signal through the second network transformer.

[0012] B3. If the Ethernet data is not signaling or control data, the Ethernet data is analyzed again to determine whether it is RTP voice stream data. If it is RTP voice stream data, the RTP voice stream data is converted into digital audio data and transmitted to the audio codec chip, converted into an analog signal by the audio codec chip, and output a four-wire signal through the second network transformer; if it is not RTP voice stream data, no processing is performed.

[0013] The beneficial effects of the present invention are as follows: the railway train dispatching four-wire access equipment connects multiple 450M analog train dispatching station radio stations through a four-wire interface, and connects to the central server of the digital train dispatching communication system through an Ethernet interface. It can connect the traditional 450M analog train dispatching station radio stations to the digital train dispatching communication system, realize the dispatching communication and network management monitoring between the digital train dispatching system and the 450M analog train dispatching station radio stations, and provide technical means for the upgrade transition compatibility of the railway wireless train dispatching system, which is of great significance to ensuring railway driving safety and improving transportation operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a working principle diagram of the railway train dispatching four-line access device of the present invention; Figure 2 for Figure 1 Circuit connection diagram of four-line access equipment for China Railway train dispatching; Figure 3 The communication flow chart of the 450M analog train modulation station radio station to the digital train modulation center server of the present invention; Figure 4 The present invention is a flow chart of the communication from the digital train modulation center server to the 450M analog train modulation station radio station. DETAILED DESCRIPTION

[0015] In order to more clearly understand the present invention, it is described in detail below with reference to the accompanying drawings and embodiments.

[0016] like Figure 1 As shown, a railway train dispatching four-wire access device has a four-wire interface and an Ethernet interface, which is connected to multiple 450M analog train dispatching station radio stations through the four-wire interface and connected to the central server of the digital train dispatching communication system through the Ethernet interface.

[0017] like Figure 2As shown, a railway train dispatching four-line access device includes a first network transformer and a second network transformer, both of which are model VT-36003, an audio codec chip, model TLV320AIC3104, a modular connector, model HR911105A, a PHY chip, model DAP8211R, and a processor chip, model MIMXRT1021CAG4B.

[0018] Pin 9 of the first network transformer is connected to the four-wire input +, pin 7 is connected to the four-wire input -, pin 2 is connected to the audio codec chip LINE1P pin, and pin 4 is connected to the audio codec chip LINE1M pin; pin 2 of the second network transformer is connected to the four-wire output +, pin 4 is connected to the four-wire output -, pin 9 is connected to the audio codec chip HPCOM pin, and pin 7 is connected to the audio codec chip HPOUT pin; the UTP end of the modular connector is connected to the digital modulation center server, and the CHIP end is connected to the PDM end of the PHY chip; the I2S interface of the processor chip is connected to the I2S interface of the audio codec chip, the I2C interface is connected to the I2C interface of the audio codec chip, and the RMII interface is connected to the MAC end of the PHY chip.

[0019] The implementation method of the railway train dispatching four-wire access equipment includes the communication process from the 450M analog train dispatching station radio to the digital train dispatching center server and the communication process from the digital train dispatching center server to the 450M analog train dispatching station radio.

[0020] like Figure 3 As shown in the figure, the communication process from the 450M analog train modulation station radio to the digital train modulation center server is performed as follows: A1. The railway train dispatching four-wire access device transmits the received four-wire input analog signal to the audio codec chip through the first network transformer, converts it into digital data through the audio codec chip and transmits it to the processor chip, and analyzes and processes the digital data through the processor chip to determine whether the digital data is signaling or control data.

[0021] A2. If the digitized data is signaling or control data, the signaling or control data is converted into digital train dispatching system communication protocol data, and then transmitted to the digital train dispatching center server via Ethernet.

[0022] A3. If the digitized data is not signaling or control data, the digitized data is converted into RTP voice stream data and then transmitted to the digital modulation center server via Ethernet.

[0023] like Figure 4 As shown in the figure, the communication process from the digital train modulation center server to the 450M analog train modulation station radio station performs the following operations: B1. The railway train dispatching four-wire access device receives the Ethernet data sent by the digital train dispatching center server through Ethernet and transmits it to the processor chip through the modular connector and PHY chip. The processor chip analyzes and processes the Ethernet data to determine whether the Ethernet data is signaling or control data.

[0024] B2. If the Ethernet data is signaling or control data, the signaling or control data is converted into 450M analog modulation system communication protocol data, and then converted into digital frequency modulation data and transmitted to the audio codec chip, converted into an analog signal by the audio codec chip, and outputted as a four-wire signal through the second network transformer.

[0025] B3. If the Ethernet data is not signaling or control data, the Ethernet data is analyzed again to determine whether it is RTP voice stream data. If it is RTP voice stream data, the RTP voice stream data is converted into digital audio data and transmitted to the audio codec chip, converted into an analog signal by the audio codec chip, and output a four-wire signal through the second network transformer; if it is not RTP voice stream data, no processing is performed.

Claims

1. A railway train dispatching four-line access device, characterized by: Including a first network transformer and a second network transformer, both of which are model VT-36003, an audio codec chip of model TLV320AIC3104, a modular connector of model HR911105A, a PHY chip of model DAP8211R, and a processor chip of model MIMXRT1021CAG4B; Pin 9 of the first network transformer is connected to the four-wire input +, pin 7 is connected to the four-wire input -, pin 2 is connected to the LINE1P pin of the audio codec chip, and pin 4 is connected to the LINE1M pin of the audio codec chip; Pin 2 of the second network transformer is connected to the four-wire output +, pin 4 is connected to the four-wire output -, pin 9 is connected to the HPCOM pin of the audio codec chip, and pin 7 is connected to the HPOUT pin of the audio codec chip; the UTP end of the modular connector is connected to the digital modulation center server, and the CHIP end is connected to the PDM end of the PHY chip; the I2S interface of the processor chip is connected to the I2S interface of the audio codec chip, the I2C interface is connected to the I2C interface of the audio codec chip, and the RMII interface is connected to the MAC end of the PHY chip.

2. A method for implementing the railway train dispatching four-line access device according to claim 1, characterized in that: The implementation method includes the communication process from the 450M analog train modulation station radio to the digital train modulation center server and the communication process from the digital train modulation center server to the 450M analog train modulation station radio; The communication process from the 450M analog train modulation station radio to the digital train modulation center server performs the following operations: A1. The railway train dispatching four-wire access device transmits the received four-wire input analog signal to the audio codec chip through the first network transformer, converts the received four-wire input analog signal into digital data through the audio codec chip and transmits the digital data to the processor chip, and analyzes and processes the digital data through the processor chip to determine whether the digital data is signaling or control data; A2. If the digitized data is signaling or control data, the signaling or control data is converted into digital train dispatching system communication protocol data, and then transmitted to the digital train dispatching center server via Ethernet; A3. If the digitized data is not signaling or control data, the digitized data is converted into RTP voice stream data and then transmitted to the digital train dispatching center server via Ethernet; The communication process from the digital train modulation center server to the 450M analog train modulation station radio station performs the following operations: B1. The railway train dispatching four-wire access device transmits the Ethernet data received from the digital train dispatching center server via Ethernet to the processor chip through the modular connector and the PHY chip, and analyzes and processes the Ethernet data through the processor chip to determine whether the Ethernet data is signaling or control data; B2. If the Ethernet data is signaling or control data, the signaling or control data is converted into 450M analog column modulation system communication protocol data, and then converted into digital frequency modulation data and transmitted to the audio codec chip, and then converted into analog signal by the audio codec chip, and output four-wire signal through the second network transformer; B3. If the Ethernet data is not signaling or control data, the Ethernet data is analyzed again to determine whether it is RTP voice stream data. If it is RTP voice stream data, the RTP voice stream data is converted into digital audio data and transmitted to the audio codec chip, converted into an analog signal by the audio codec chip, and output a four-wire signal through the second network transformer; if it is not RTP voice stream data, no processing is performed.

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