Intelligent gateway for railway multimode communication

Abstract

The invention provides an intelligent gateway for railway multimode communication, and belongs to the technical field of communication equipment, a core processor comprises a data interface, a data processing CPU, security authentication software, an encryption chip, a protocol converter, a geographic information memory and a signal decision controller, and a signal processing module comprises a signal receiving circuit, a signal conditioning circuit and a microcontroller; the sensor module comprises a speed sensor, an acceleration sensor, an angular velocity sensor and an angular acceleration sensor; the display screen is externally powered; the indicator lamp, the processing circuit, the chip, the CPU, the circuit, the microcontroller and the like are powered by an independent low-voltage power supply and are planned and integrated into a power supply module for integration. According to the invention, signal reinforcement is carried out on a 400MHz signal coverage blind area by using a 5G network, signal reinforcement can be carried out on a radio signal coverage blind area on a tie line between a national railway and a local railway junction station, and a train can still communicate with a platform when running to the signal coverage blind area, so that the purpose of safe operation and maintenance of the railway is achieved.

Description

Technical Field

[0001] The present invention relates to the field of communication equipment technology, and specifically to an intelligent gateway for railway multi-mode communication, which is used for the networking communication of a railway 400MHz wireless train dispatching system. The 5G network can be used to reinforce the communication in the blind area covered by the 400MHz wireless train dispatching networking system, thereby improving the communication reliability between trains and connecting stations. Background Art

[0002] 5G technology supports high-speed mobile communications and has the technical characteristics of large bandwidth, large capacity of connected devices, ultra-reliability and low latency. For the complex and diverse application scenarios of railways, 5G can give full play to its technical advantages and make up for the shortcomings of the old railway communication system. According to the analysis of traffic statistics, the resource utilization rate of the operator's 5G network PRB (Physical Resource Block) on most lines is only about 20%. Applying the idle resources of the operator's network to railway data transmission will greatly improve resource utilization, achieve joint communication, and achieve a win-win situation for all parties.

[0003] As a new generation of wireless train modulation system, the station radio and locomotive radio in the 400MHz wireless train modulation system communicate wirelessly, using the 400MHz spectrum for voice data transmission. The 400MHz spectrum has good penetration performance and anti-interference ability, and can achieve a wider signal coverage range in relatively flat and open areas. However, in mountainous areas, hills or densely built areas, the coverage range will be limited to a certain extent due to the obstruction of terrain and buildings. Various complex terrains are inevitable in long-distance railway transportation scenarios, and adjacent base stations often cannot achieve full signal coverage of the railway section between base stations, resulting in the emergence of signal coverage blind spots. When a train travels to a blind spot, it will not be able to get in touch with the station, posing a huge safety hazard and not in line with the railway's safety concept.

[0004] At present, in order to solve this problem, the signal can be strengthened by adding optical fiber repeater stations. However, between the connecting stations of different levels of railways, due to the different properties of the railway lines on both sides, it is not easy to add signal strengthening measures on the contact line between the connecting stations. This will involve issues such as frequency planning, cross-region interference, and equipment management along the line, which increases the complexity of cooperation between railways of different levels and is not conducive to the interconnection and interoperability of the two sides. In addition, the existing locomotive integrated wireless communication equipment can achieve the complementary 450Mhz signal and GSM-R signal to solve the problem of single signal coverage blind spots, and automatically complete the switching between 450MHz and GSM-R networks on the established route. However, considering factors such as line type, train type, operation requirements, and deployment cost, this equipment is currently not suitable for the connecting station section between national railways and local railways. In addition, the research and development and deployment of locomotive integrated wireless communication equipment was relatively early, using the 450Mhz signal that is about to be eliminated and the GSM technology that has been used for a long time, without using the latest emerging 400MHz signal and 5G technology, wasting communication resources. Moreover, the GSM-R system is generally used in national railways, not local railway systems. For the communication between local railway stations and trains, it is essentially still a single 450Mhz signal communication, which cannot compensate for signal blind spots. In general, the locomotive integrated wireless communication equipment is difficult to deploy in the connection station between national railways and local railways, the communication technology is backward, and the use of GSM-R is limited. It is not suitable for solving the communication problem between national railways and local railways.

[0005] The Communication and Signal Research Institute of China Academy of Railway Sciences Group Co., Ltd. and others have designed a railway wireless communication network system that can integrate the wireless signals of multi-standard railway-specific mobile communication systems such as DRTD system, GSM-R system, and 5G-R into the tunnel. However, this technology cannot effectively solve the problem of signal coverage blind spots between the national railway and local railway connection stations. The comprehensive application of various railway communication systems is achieved by laying communication cables in tunnels and setting up POI and other equipment, but it is not suitable for various complex terrains other than tunnels, and it is not universal in the long-distance communication scenarios of railways. The equipment is complex, and more equipment needs to be deployed and there are a large number of connecting lines between the equipment, which is costly and puts great pressure on the operation and maintenance management of the connection line between the national railway and the local railway. It is only applicable to a single national railway line or a single local railway line, not to the connection section between the national railway and the local railway. The system is difficult to deploy when it involves railway lines of different natures.

[0006] Beijing Jinhong Xidian Information Technology Co., Ltd. has proposed a locomotive integrated wireless communication device and digital train dispatching system. The invention can realize that the CIR device can adaptively switch between 450M and 400M at the same time, providing support for the replacement and improvement of the train dispatching system. However, the technology has the following shortcomings in use: the system is still using the 450Mhz frequency band, which is only suitable for the transition stage and will eventually be eliminated in the long run. At that time, a new system will need to be replaced, which is not practical. The system does not take advantage of the booming 5G technology, does not make rational use of railway communication resources, and the communication quality in the original 450Mhz section has not been changed. The system includes a host, an operation display terminal MMI, and a multi-band antenna. The signal switching is realized by the main control unit and the satellite positioning unit. The system structure is not much different from the existing locomotive integrated wireless communication equipment, but the frequency band used for communication has been changed, which is not innovative enough. Considering factors such as line type, train type, operation requirements, and deployment costs, whether the system is suitable for the section where the national railway and the local railway are connected remains to be considered. Summary of the invention

[0007] The purpose of the present invention is to provide an intelligent gateway for railway multi-mode communication, which integrates railway 5G resources and 400MHz frequency band for train-ground communication, can automatically switch the signal frequency band used for communication between trains and stations, can realize voice transmission between trains and stations, and ensure communication security. It avoids compatibility issues between national railways and local railway stations, reduces the complexity of operating and maintaining communication equipment between stations, has the advantages of low deployment difficulty, low deployment cost, easy operation, and universal applicability, so as to solve at least one technical problem existing in the above-mentioned background technology.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] The present invention provides an intelligent gateway for railway multi-mode communication, comprising: a display screen, a sensor module, a radio transceiver module, a power supply module, a core processor, a positioning module, a voice module, a sensor module, a signal processing module, and an indicator light, wherein the core processor includes a data interface, a data processing CPU, a security authentication software, an encryption chip, a protocol converter, a geographic information storage device, and a signal decision controller; the voice module includes a data interface, an integrated microphone, and a call switch; the signal processing module includes a signal receiving circuit, a signal conditioning circuit, and a microcontroller; and the sensor module includes a velocity sensor, an acceleration sensor, an angular velocity sensor, and an angular acceleration sensor. The display screen is powered by an external power supply; the indicator light, the processing circuit, the chip, the CPU, the circuit, the microcontroller, etc. are powered by an independent low-voltage power supply, and are planned to be integrated into a power supply module for integration. These units are all necessary units of the gateway, are interconnected, and are a combination.

[0010] Furthermore, the gateway is equipped with a radio transceiver module, and the bidirectional dual-mode antenna in the module performs conversion between radio signals and electrical signals, realizes signal reception and transmission, and transmits the received information to the signal processing module.

[0011] In the future, the asynchronous gateway will be equipped with a signal processing module. The signal processing module contains a signal receiving circuit, a signal conditioning circuit, and a microcontroller. The microcontroller is equipped with protocol conversion software. The signal processing module can receive and process the information from the two-way dual-mode antenna, convert it into digital information, and then transmit it to the core processor.

[0012] Furthermore, the gateway is equipped with a core processor, which has the following functions: pre-processing the inputted geographic information data of the train running section and the base station signal coverage data, the detailed process of pre-processing is shown above. The pre-processing results are stored in the geographic information memory. Receive the digital signal from the signal processing module, perform security authentication, encryption processing, protocol conversion on the signal, and transmit it to the voice module. Read the optimal switching point position information in the geographic information memory in real time, receive the information from the sensor module and the positioning module, and issue the signal switching instruction to the radio transceiver module through the signal decision controller. Receive the information sent by the voice module and convert it into a digital signal accordingly, and transmit the digital signal to the signal processing module for further processing. Control the display screen and send instructions to the indicator light.

[0013] Furthermore, the gateway is equipped with a sensor module, which includes a velocity sensor, an acceleration sensor, an angular velocity sensor, and an angular acceleration sensor. The sensor module feeds back information to the core processor.

[0014] Furthermore, the gateway is equipped with a voice module, the core processor transmits the digital information to the voice module for voice playback, and the voice module transmits the collected voice information to the core processor.

[0015] Furthermore, the gateway is equipped with an indicator light and a display screen, and the core processor controls the indicator light to light up and go out. The display screen can display the signal frequency band currently selected by the gateway, which is controlled by the core processor.

[0016] Furthermore, the gateway is equipped with a positioning module, which provides location information through satellite positioning systems such as GPS and Beidou or base station positioning technology, and can use auxiliary positioning devices such as Wi-Fi and Bluetooth to improve the accuracy and speed of positioning.

[0017] Furthermore, the gateway is equipped with a power supply module, which is an integrated power supply unit composed of independent low-voltage power supplies required by the indicator light, signal processing module, core processor, sensor module, positioning module, and voice module.

[0018] Furthermore, 5G networking equipment and 400MHz wireless train modulation equipment should be installed outside the gateway and along the railway.

[0019] The beneficial effects of the present invention are as follows: by using the 5G network to reinforce the signal in the blind area of ​​400MHz signal coverage, the signal can be reinforced in the blind area of ​​radio signal coverage on the connecting line between the national railway and the local railway connection station, so that the train can still communicate with the platform when it travels to the blind area of ​​signal coverage, thereby achieving the purpose of safe railway operation and maintenance.

[0020] Additional advantages of the present invention will be more clearly given in the following description or learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 This is a three-dimensional structural diagram of an intelligent gateway for railway multi-mode communication according to an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the internal structure of an intelligent gateway for railway multi-mode communication according to an embodiment of the present invention.

[0024] Figure 3 This is a functional principle block diagram of a radio transceiver module of an intelligent gateway for railway multi-mode communication according to an embodiment of the present invention.

[0025] Figure 4 This is a functional principle block diagram of the intelligent gateway signal processing module for railway multi-mode communication according to an embodiment of the present invention.

[0026] Figure 5 The present invention is a schematic diagram of the working process of the intelligent gateway signal processing module for railway multi-mode communication according to an embodiment of the present invention.

[0027] Figure 6 This is a functional principle block diagram of the core processor of the intelligent gateway for railway multi-mode communication according to an embodiment of the present invention.

[0028] Figure 7 The present invention is a schematic diagram of the working process of the core processor of the intelligent gateway for railway multi-mode communication according to an embodiment of the present invention.

[0029] Figure 8 This is a functional principle block diagram of the intelligent gateway voice module for railway multi-mode communication described in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below by the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0031] It should be understood by those skilled in the art that unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which this invention belongs.

[0032] It should also be understood that terms, such as those defined in commonly used dictionaries, should be understood to have a meaning consistent with that in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless as defined herein.

[0033] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or groups thereof.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. Different embodiments or examples described in this specification and features of different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

[0035] To facilitate understanding of the present invention, the present invention is further explained below with reference to specific embodiments in conjunction with the accompanying drawings, and the specific embodiments do not constitute a limitation on the embodiments of the present invention.

[0036] Those skilled in the art should understand that the drawings are merely schematic diagrams of embodiments, and the components in the drawings are not necessarily necessary for implementing the present invention.

[0037] In order to meet the safety requirements of railways, improve the utilization rate of network resources, and enhance the convenience of interconnection between national railways and local railway connection stations, the present invention designs an automatic switching intelligent gateway for railway communications to reinforce the single spectrum communication between national railways and local railways, make intelligent decisions to switch networks in the 400MHz signal coverage blind spot area, and use the 5G public network provided by the current third-party network operator to realize communication between trains and stations, which is in line with the development trend of intelligent railway communications.

[0038] In a specific embodiment, a smart gateway is provided for using 5G network to reinforce the signal in the blind area of ​​400MHz signal coverage, which can reinforce the signal in the blind area of ​​radio signal coverage on the connecting line between the national railway and the local railway, so that the train can still communicate with the platform when it travels to the blind area of ​​signal coverage, thereby achieving the purpose of railway safe operation and maintenance. Figure 1 As shown, the external structure of the gateway described in this embodiment includes a power cord, an antenna, a display screen, a status indicator light, a call button, an integrated microphone and a packaging shell. When the gateway is deployed to the cab, it will send instructions to the top antenna through the internal core processor module to select and receive the appropriate signal, and the type of signal used, 400MHz or 5G, will be displayed on the display to inform the user. When the station establishes a voice call with the driver, the sound will be played directly to the driver through the integrated microphone; when the driver establishes a voice call with the station, it is necessary to press the call button to turn on the integrated microphone voice signal collection function. At this time, the core processor receives the driver's call request and prepares to process the data and lights up the status indicator light. After the driver completes the call, press the call button again, the integrated microphone ends the voice collection, the core processor ends the call request and turns off the status indicator light.

[0039] The complete internal structure of the intelligent converged gateway provided in this embodiment is as follows: Figure 2 As shown, it includes: display screen, sensor module, radio transceiver module (including dual-mode bidirectional antenna), power supply module (including indicator light, processing circuit, chip, sensor module, CPU, circuit, microcontroller, sensor, etc. required independent low-voltage power supply), core processor (including data interface, data processing CPU, encryption chip, protocol converter, geographic information storage, signal decision controller, etc.), positioning module, voice module (including integrated microphone, call switch), signal processing module (including signal receiving circuit, signal conditioning circuit, microcontroller, etc.), indicator light. Among them, the display screen is powered by external AC 220V voltage; indicator light, processing circuit, chip, CPU, circuit, microcontroller, etc. are powered by independent low-voltage power supply, which is planned to be integrated into power supply module for integration. The core processor controls the radio transceiver module, and the positioning module and sensor module provide information to the core processor.

[0040] This intelligent gateway is universal for different railway scenarios. Before use, the geographic information of the train running section and the base station signal coverage are input into the core processor inside the gateway for data preprocessing. Data preprocessing includes: the core processor (contained in the gateway) calculates the signal attenuation degree at different geographical locations within the signal range of each base station according to the characteristics of the 5G and 400MHz radio spectrum; the optimal signal on each section of the train running section is calculated by combining the collection and transmission performance of the dual-mode bidirectional antenna 400MHz radio and 5G signals and the signal coverage strength obtained after calculating the attenuation, and the running section is divided into each "400MHz strong signal section" and "5G strong signal section" according to the optimal signal; when the train runs to different strong signal sections, the intelligent gateway will switch the signal to ensure the communication quality. The data preprocessing stage will consider various factors to determine each optimal signal switching point, and store the optimal switching point location information in the geographic information storage. For different railway scenarios, you only need to re-enter the new geographic information along the line and the base station situation into the gateway for data preprocessing to update the data and put the gateway into use in the new scenario.

[0041] When the train departs from the departure station, it will enter the "400MHz strong signal segment" and "5G strong signal segment" respectively. During this process, the core processor inside the gateway will control the dual-mode bidirectional antenna to perform intelligent signal switching. The specific steps are as follows: The core processor reads information from the geographic information storage device to obtain the location information of each optimal signal switching point in the train operation range. The core processor obtains the train position in real time through the positioning module and compares it with the coordinates of the optimal switching point. The sensor transmits the collected train speed, acceleration, angular velocity and other information to the core processor. When the gateway approaches the optimal switching point, it combines the train speed, direction and other train operation information to predict the timing of signal switching, and issues a switching instruction to the radio receiving module to complete the intelligent signal switching.

[0042] When the station establishes a call with the train driver, the optimal signal should be selected according to the train position to establish a call request (for example, in the 400MHz coverage blind area, the 5G signal should be used to establish contact with the gateway, and the optimal signal judgment should be consistent with the train). The station voice information is transmitted to the driver by radio, and is received by the radio transceiver module in the present invention and converted into an electrical signal and transmitted to the signal processing module. The signal processing module converts the electrical signal into a digital signal, converts the electrical signal into a data signal and encapsulates it into a format that the core processor can understand and passes it to the core processor. The core processor further analyzes and encrypts the data and sends it to the voice module, and plays the station voice information to the driver through the voice module. When the train driver establishes a call with the station, the driver presses the call button to establish a call request, and the voice module collects the driver's voice information and hands it over to the core processor, which processes the information and sends it to the signal processing module. The signal processing module converts the data into an electrical signal and hands it over to the radio transceiver module, which converts the electrical signal into a radio electromagnetic wave and sends it out.

[0043] For the radio transceiver module, the structure of the digital voltage regulator module is as follows Figure 3 As shown in the figure, its core device is a dual-mode bidirectional antenna. The dual-mode bidirectional antenna can support two different wireless communication modes, 400MHz radio and 5G signal, and can perform bidirectional transmission in both communication modes. The core processor controls the bidirectional dual-mode antenna to receive the optimal signal at the current location. After receiving the radio signal, the bidirectional dual-mode antenna converts it into an electrical signal and sends it to the signal processing module.

[0044] like Figure 4 As shown, for the signal processing module, a. the signal processing module receives the electrical signal from the radio transceiver module through the signal receiving circuit, and performs electrical signal processing operations such as filtering, amplification (or attenuation) on the electrical signal in the signal conditioning circuit. The conditioned electrical signal is sent to the microcontroller, and the electrical signal is converted into a data signal through the microcontroller and the protocol parsing and conversion software and encapsulated into a format that the core processor can understand and transmitted to the core processor. b. The signal processing module receives the digital signal from the core processor, modulates the digital signal into an electrical signal and transmits it to the radio transceiver module.

[0045] like Figure 5As shown, when the station establishes a call with the train, first, the signal receiving circuit receives the analog signal transmitted by the radio transceiver module. Then, the microcontroller controls the signal conditioning circuit to amplify and filter the signal, convert the analog signal into a digital signal, and demodulate the converted digital signal. Next, the protocol parsing and conversion software prepares the data packet, the microcontroller connects to the network via Ethernet, and the control software configures parameters such as IP address and port to encapsulate the data packet. Finally, the protocol parsing and conversion software selects the appropriate communication protocol (TCP / IP, UDP, etc.) for further encapsulation, and uses the network protocol (JSON, XM, etc.) to send data to the core processor. When the train establishes a call with the station, after the microcontroller receives the data sent by the core processor according to the corresponding network protocol and communication protocol, the control software parses the parameters such as IP address and port of the data packet, modulates the digital signal, converts it into an analog signal, and sends it out.

[0046] The signal processing module supplies power to the circuit and microcontroller through the power supply module. When the driver establishes a call request to the station, the core processor controls the indicator light to light up; when the driver ends the call with the station, the core processor controls the indicator light to go out. The indicator light is powered by the power supply module. The display screen is controlled by the core processor and is responsible for displaying the type of signal currently selected by the intelligent gateway. When the gateway switches the signal, the signal switching animation is shown; when the gateway completes the signal switching, the switching is displayed as completed. For the positioning module, the location information is provided through satellite positioning systems such as GPS and Beidou or base station positioning technology, and auxiliary positioning devices such as Wi-Fi and Bluetooth can be used to improve the accuracy and speed of positioning. It can adapt to different environments and application scenarios, provide stable and reliable positioning services, and transmit the location information to the core processor for processing. The positioning module is powered by the power supply module.

[0047] like Figure 6 As shown, the core processor includes a geographic information memory, a signal decision controller, a data processing CPU, a protocol converter, network security authentication, an encryption chip, and a data interface. The core processor has the following functions: a. Preprocess the input train operation section geographic information data and base station signal coverage data. The detailed process of preprocessing is shown above. The preprocessing results are stored in the geographic information memory. b. Receive the digital signal from the signal processing module, perform security authentication, encryption processing, protocol conversion on the signal, and transmit it to the voice module. c. Read the optimal switching point position information in the geographic information memory in real time, receive information from the sensor module and the positioning module, and issue a signal switching instruction to the radio transceiver module through the signal decision controller. d. Receive the information sent by the voice module and convert it into a digital signal accordingly, and transmit the digital signal to the signal processing module for further processing. e. Control the display screen and send instructions to the indicator light.

[0048] like Figure 7 As shown in the figure, when the station establishes a call with the train, the core processor receives the signal processed by the front module and performs further processing. First, the core processor performs security authentication on the data, and uses the key, digital signature or other means attached by the sender to confirm the source and integrity of the data to prevent the data from being tampered with during transmission. Then, the core processor decrypts the encrypted data and extracts valid information. Then, the extracted information is converted into a format that the speaker can understand, such as PCM, WAV, MP3, etc. Finally, the digital signal is converted into an analog signal, and the analog signal is filtered, amplified and other enhanced operations are performed on the analog signal before being sent to the voice module, and the voice is played to the driver through the speaker in the voice module. When the train establishes a call with the station, the core processor receives the voice signal transmitted by the voice module and performs further processing. First, the core processor converts the analog signal into a digital signal, and performs noise reduction and echo elimination on the digital signal. Then, the key information is encrypted to prevent information leakage. Then, by adding keys, digital signatures and other methods to the data, the receiver is helped to confirm the source and integrity of the data. Finally, the network protocol used (such as UDP, TCP, HTTP, etc.) is determined to encapsulate the data packet and send the encrypted data packet through the network.

[0049] The data interface in the core processor is responsible for receiving digital signals from the signal processing module and voice signals collected by the voice module; the network security authentication module is responsible for security authentication of received data and adding authentication keys, digital signatures, etc. to the sent data; the encryption chip is responsible for decrypting received data and encrypting sent data; the protocol converter is responsible for converting received data into a suitable audio format and encapsulating the selected transmission protocol for the sent data. The data processing CPU can realize AD / DA conversion and other signal processing.

[0050] The core processor is powered by the power supply module.

[0051] For the sensor module, including the velocity sensor, acceleration sensor, angular velocity sensor, and angular acceleration sensor, the sensor transmits the collected information to the core processor. The sensor module is powered by the power supply module.

[0052] like Figure 8 As shown, the voice module includes a call switch, an integrated microphone, and a data interface. In addition to the microphone recording function, the integrated microphone also has a built-in speaker for audio playback. The voice module receives information sent by the core processor for playback. After pressing the call switch, the integrated microphone turns on the recording function, collects voice information and sends it to the core processor. The voice module is powered by the functional module.

[0053] The integrated power supply includes the independent low-voltage power supply required by each module and is responsible for supplying power to each module.

[0054] To sum up, the present invention is aimed at the scenario of the connection section between the national railway station and the local railway station. In view of the fact that there is a radio signal coverage blind spot on the current connecting line between the national railway and the local railway connection station, the train cannot communicate with the platform when it reaches the coverage blind spot, which does not meet the railway safety concept; the line operator's 5G network resource utilization rate is low, resulting in resource waste; the old 450Mhz communication frequency band will be replaced by the 400MHz frequency band, and other problems, an intelligent gateway is designed to use the 5G network to reinforce the signal in the 400MHz signal coverage blind spot. By comprehensively utilizing the 400MHz frequency band that will be used by both the national railway platform and the local railway platform in the future and the 5G network provided by the third-party operator, it is ensured that the train can still communicate with the platform when it reaches the signal coverage blind spot.

[0055] Through the present invention, when a train passes through a blind area of ​​the 400MHz wireless train control system signal coverage, the train will still be able to communicate normally with the train platform. The present invention does not require the train driver or station personnel to perform switching operations, but performs intelligent signal switching through the information provided by its own positioning module and sensor, and displays the signal type on the display and feeds back to the driver. While eliminating the need for human operation, the algorithm is used to achieve high-precision signal switching operations, improving user comfort. At the same time, the present invention performs security authentication and encryption protection on call information to ensure the security of the call. In addition, the present invention is applicable to the connecting station section of the national railway and the local railway. According to the "Notice of the General Office of the National Railway Administration on Standardizing the Use of Railway Radio Frequencies" (National Railway General Equipment Supervision

[2024] No. 3) issued by the National Railway Administration in 2024, the wireless train dispatching of national railway stations and local railway stations in the future will use the 400MHz frequency band. The present invention integrates the 400MHz frequency band and the 5G network provided by third-party operators for communication, avoiding compatibility issues between national railways and local railway stations, and reducing the complexity of operation and maintenance of communication equipment between the two stations. It has the advantages of low deployment difficulty, low deployment cost, easy operation, and universal applicability.

[0056] The key point of the present invention lies in the design of an intelligent gateway for railway multi-mode communication. First, the design integrates railway 5G resources and the 400MHz frequency band for train-to-ground communication, and can automatically switch the signal frequency band used for communication between trains and stations, so as to realize voice transmission between trains and stations and ensure communication security. Secondly, the above scheme specifically designs the structure of the gateway device and the functions of each component, such as display screen, sensor module, radio transceiver module, etc., so that the gateway device has feasibility. Thirdly, this intelligent gateway is universal for different railway scenarios. Before use, the geographic information of the train running section and the base station signal coverage are input into the core processor inside the gateway, and a communication module is added. It can be well applied to the communication reinforcement between railway stations in other regions, not limited to areas using 400M and 5G networks.

[0057] In this solution, some of the components used by the smart gateway can indeed achieve similar goals through some alternative means, which may bring changes in cost, performance, or compatibility in some aspects. However, as a whole device, it is difficult to find a communication gateway that can perform similar functions.

[0058] The positioning module of the present invention, in addition to providing location information through satellite positioning systems such as GPS and Beidou or base station positioning technology, can also use ground transponders to provide train location information. Common points: Whether it is GPS, Beidou or ground transponders, they can provide relatively accurate train location information for the intelligent gateway, but Beidou and others use satellite technology, while transponders use radio frequency identification technology. The specific technologies adopted by other modules when completing a certain function are somewhat substitutable, for example, the algorithm used by the encryption chip can be symmetrical or asymmetrical. However, these specific technologies themselves do not belong to the innovation of the scheme, so this substitutability does not affect the innovation level of this scheme. In terms of module design concepts and uses alone, there is basically no similar scheme. The intelligent gateway for railway multi-mode communication proposed by the present invention realizes intelligent signal switching through data preprocessing and real-time data processing (positioning information, sensor information) by the core processor and algorithm comparison, and issues instructions to the two-way dual-mode antenna via the signal decision controller. In addition, the present invention realizes data transmission and information interaction between trains and platforms, providing a guarantee for the security of communication. The present invention avoids the inconsistency of communication systems (such as the GSM-R system only used for national railways) and spectrum conflicts that may exist between national railway stations and local railway stations in the connecting station section. It has the advantages of low cost, easy deployment, easy operation, and strong universality. It utilizes the currently emerging 5G technology and the latest railway communication 400MHz frequency band to maximize the use of railway communication resources. Taking all factors into consideration, it is difficult to find other alternatives to achieve the purpose of this invention, but there should be some other solutions proposed in the specific implementation process.

[0059] In the present invention, the signal reinforcement device, also known as the signal amplifier, is a device for enhancing wireless signals. When the existing railway communication equipment is used, it is used in a wireless coverage manner. However, when the wireless signal is covered, the wireless signal strength in some areas is weak, so the device is used to enhance the wireless signal strength. For multi-mode communication, multi-mode refers to a device or technology with multiple working modes. In the field of communication, it specifically refers to communication using multiple communication networks, such as WiFi, 4 / 5G, Bluetooth, etc. Wireless train dispatching system: Train wireless dispatching telephone, referred to as wireless train dispatching, as an important part of railway driving communication, is known as one of the "three pillars" of train operation. Its existence plays an indispensable role in ensuring the punctual operation of trains, reducing locomotive energy consumption, improving transportation efficiency, timely reporting of emergencies, preventing accidents and carrying out rescue and emergency rescue. GSM-R system: Global System for Mobile Communications–Railway, is an international wireless communication standard for railway communications, which is used to complete the communication between trains and dispatching centers. It can be understood as a 2G communication network dedicated to railways.

[0060] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0061] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0062] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0063] These computer program instructions can also be loaded onto a computer or other programmable data processing device, and a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0064] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative work on the basis of the technical solution disclosed in the present invention should be included in the scope of protection of the present invention.

Claims

1. An intelligent gateway for railway multi-mode communication, characterized in that: include: Display screen, sensor module, radio transceiver module, power supply module, core processor, positioning module, voice module, sensor module, signal processing module, indicator light; the core processor includes data interface, data processing CPU, security authentication software, encryption chip, protocol converter, geographic information storage, signal decision controller; the voice module includes data interface, integrated microphone, call switch; the signal processing module includes signal receiving circuit, signal conditioning circuit, microcontroller; the sensor module includes velocity sensor, acceleration sensor, angular velocity sensor, angular acceleration sensor; the display screen is powered externally; the indicator light, processing circuit, chip, CPU, circuit, microcontroller, etc. are powered by an independent low-voltage power supply, and are planned to be integrated into a power supply module for integration.

2. The intelligent gateway for railway multi-mode communication according to claim 1, characterized in that: Also includes: The radio transceiver module uses the bidirectional dual-mode antenna inside the module to convert between radio signals and electrical signals, realize signal reception and transmission, and transmit the received information to the signal processing module.

3. The intelligent gateway for railway multi-mode communication according to claim 1, characterized in that: Also includes: The signal processing module contains a signal receiving circuit, a signal conditioning circuit, and a microcontroller. The microcontroller is equipped with protocol conversion software. The signal processing module can receive and process information from the bidirectional dual-mode antenna, convert it into digital information, and then transmit it to the core processor.

4. The intelligent gateway for railway multi-mode communication according to claim 1, characterized in that: It also includes: a core processor for preprocessing the input geographic information data of the train running section and the base station signal coverage data. The detailed process of preprocessing is described above. The preprocessing results are stored in the geographic information memory; receiving the digital signal from the signal processing module, performing security authentication, encryption processing, protocol conversion on the signal, and transmitting it to the voice module; reading the optimal switching point position information in the geographic information memory in real time, receiving the information from the sensor module and the positioning module, and issuing the signal switching instruction to the radio transceiver module through the signal decision controller; receiving the information sent by the voice module and converting it into a digital signal accordingly, and transmitting the digital signal to the signal processing module for further processing; controlling the display screen and sending instructions to the indicator light.

5. The intelligent gateway for railway multi-mode communication according to claim 1, characterized in that: Also includes: The sensor module includes a velocity sensor, an acceleration sensor, an angular velocity sensor, and an angular acceleration sensor. The sensor module feeds back information to the core processor.

6. The intelligent gateway for railway multi-mode communication according to claim 1, characterized in that: Also includes: Voice module, the core processor transmits digital information to the voice module for voice playback, and the voice module transmits the collected voice information to the core processor.

7. The intelligent gateway for railway multi-mode communication according to claim 1, characterized in that: Also includes: Equipped with indicator lights and a display, the core processor controls the indicator lights to turn on and off. The display screen can show the signal frequency band currently selected by the gateway, which is controlled by the core processor.

8. The intelligent gateway for railway multi-mode communication according to claim 1, characterized in that: Also includes: Equipped with a positioning module to provide location information.

9. The intelligent gateway for railway multi-mode communication according to claim 1, characterized in that: Also includes: The power supply module is an integrated power supply unit composed of independent low-voltage power supplies required by the indicator light, signal processing module, core processor, sensor module, positioning module, and voice module.

10. The intelligent gateway for railway multi-mode communication according to claim 1, characterized in that: Also includes: The outside of the gateway and along the railway are equipped with 5G networking equipment and 400MHz wireless train modulation equipment.

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