CN216981920U - Train access unit and train based on LTE-U communication - Google Patents
Train access unit and train based on LTE-U communication Download PDFInfo
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- CN216981920U CN216981920U CN202121777219.4U CN202121777219U CN216981920U CN 216981920 U CN216981920 U CN 216981920U CN 202121777219 U CN202121777219 U CN 202121777219U CN 216981920 U CN216981920 U CN 216981920U
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Abstract
The utility model discloses a train access unit and a train based on LTE-U communication, belonging to the field of traffic. The utility model converts the signal into the unauthorized frequency band without specially applying for a special frequency band, and solves the problem that the frequency spectrum resource application of the TAU equipment based on LTE-M communication in the prior application of the industry is difficult.
Description
Technical Field
The utility model belongs to the field of traffic, and relates to a train access unit and a train based on LTE-U communication.
Background
In the traffic field, technical research gradually approaches to directions of unmanned driving, automatic driving and the like, and is realized by radio frequency signals transmitted between a vehicle-mounted antenna and a ground base station antenna of an urban rail train depending on vehicle-ground communication. Therefore, in order to implement train-ground communication, a train Access unit, called a tau (train Access unit), is required on the train, which can convert radio frequency signals and ethernet signals that can be processed by the on-board device into each other. In the prior art, the more mature device applied to the TAU device is the LTE-M communication system.
However, the spectrum resource of the LTE-M frequency band is limited, and nowadays, due to the use of various industries, the restriction of the LTE network capacity of the urban rail TAU equipment by the spectrum resource is increasingly strong, the approval of the special frequency band of the LTE-M is stricter, and the difficulty of approving the spectrum resource is increased.
SUMMERY OF THE UTILITY MODEL
An object of embodiments of the present invention is to provide a train access unit and a train based on LTE-U communication, which convert to provide wider spectrum resources for the TAU device, so as to solve the above-mentioned problems.
In order to solve the technical problems, an embodiment of the utility model provides a train access unit based on LTE-U communication, which comprises a control module board card, a switch board card, a backboard connecting board card and an installing machine cage.
Optionally, the train access unit based on LTE-U communication is characterized in that the control module board includes a power supply portion, the power input module includes an external power line connected to the control module board, and the power input module is wired to the surge protection module through a PCB; the surge protection module transmits power to the first power conversion module through PCB wiring, and supplies power to the CPU processing module, the second power conversion module and the LDO module after voltage conversion; the second power conversion module receives the voltage of the first power conversion module through PCB wiring, and then performs voltage conversion as self input voltage to supply power for the LEU-U module; the LDO module supplies power to the Ethernet transceiver module and other peripheral modules.
Optionally, the control module board card includes a first signal interaction portion, the first signal interaction portion includes that the LTE-U module receives a first radio frequency signal transmitted by a vehicle-mounted antenna through a feeder through a PRX primary radio frequency port and a DRX secondary radio frequency port on a chip of the module itself, and converts the first radio frequency signal into a first digital signal after being processed by the LTE-U module, wherein the CPU processing module performs data interaction through a first USB port and a second USB port of the LTE-U module, the CPU processing module receives the first digital signal, processes the first digital signal to obtain a first effective signal, and sends the first effective signal to the ethernet transceiver module through a third input/output port in the CPU processing module and an RMII input/output port in the ethernet transceiver module, and the ethernet transceiver module receives the first effective signal, the first physical layer signal is converted into a first physical layer signal after being processed by the internal chip, and the first physical layer signal is sent to other equipment through the physical layer transceiving interface.
Optionally, the control module board further includes a second signal interaction portion, where the second signal interaction portion includes receiving, through a physical layer transceiver interface, a second physical layer signal of the other device, sending the second physical layer signal to the ethernet transceiver module, converting the second physical layer signal into a second effective signal after being processed by an internal chip, sending, according to the second effective signal, the second effective signal to the CPU processing module through an RMII input/output port in the ethernet transceiver module and a third input/output port in the CPU processing module, and obtaining a second digital signal after being processed, where the second digital signal is sent to the LTE-U module, is converted into a second radio frequency signal after being processed by the LTE-U module, and is sent to the vehicle-mounted antenna through the PRX primary radio frequency port and the DRX secondary radio frequency port on the chip of the LTE-U module by a feeder.
Optionally, the control module board card includes that the CPU processing module sends a reset instruction to a reset interface of the LTE-U module through a first input/output port, so that the LTE-U module is restarted after a process interruption occurs.
Optionally, the switch board card includes a power supply daughter board card connected to the route switch daughter board card through a line.
Optionally, the control module board card includes a second input/output port of the CPU processing module that sends a radio frequency enable instruction to the radio frequency enable interface of the LTE-U module.
Optionally, the control module board card includes a clock output that sends a clock signal to a clock input; wherein the clock output belongs to the CPU processing module and the clock input belongs to the Ethernet transceiver module.
Optionally, the CPU processing module includes a fourth input/output port, and performs data interaction with the peripheral module through an interface.
Optionally, a train is characterized by comprising a TAU device and the train access unit.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, the control module board card is converted into the unauthorized frequency band through the frequency band, so that the aim of urban rail transit establishment without specially applying a special frequency band is achieved, and the problem of difficult application of frequency spectrum resources of TAU equipment based on LTE-M communication in the existing application of the industry is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a first schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a second schematic structural diagram of an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a backplane connection board card according to an embodiment of the present invention;
FIG. 4 is a functional block diagram of a control module board card of an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a switch board card according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a train access unit based on LTE-U communication is composed of a control module board card 1, a switch board card 2, a backboard connecting board card 3 and an installing cage 4 and is characterized in that the backboard connecting board card 3 comprises three backboard slots 301, and the control module board card 1 and the switch board card 2 are sequentially inserted into the backboard slots 301; the mounting machine cage is a hollow cuboid, the backboard connecting board card 3 is connected with the control module board card 1, and the switch board card 2 penetrates through the mounting machine cage 4.
The control module board 1 is a main board for signal conversion processing, and communicates with the switch board 2 through the backplane slot 301. When the switch board card 2 receives the ethernet signal, the ethernet signal is transmitted to different vehicle-mounted devices through abundant network interfaces on the panel according to preset configurations of the VLAN, the port isolation and the like.
In addition, the TAU equipment commonly used in the industry at present encapsulates the circuit board card in a small closed box, and only corresponding interfaces are externally arranged, so that the problem of difficult heat dissipation of each key device in the equipment exists. Radio frequency transmitting and receiving and other radio frequency parameters of a plurality of LTE chip modules are sensitive to temperature, and faults that part of radio frequency parameters are abnormal are caused by temperature factors. For the problem, the utility model adopts a cage installation mode of standard industrial structural design, the standard industrial structural design of the installation cage 5 per se is very favorable for arranging the installation cage at the corresponding position of the vehicle-mounted cabinet, the heat dissipation space of the board card per se is ensured, and meanwhile, the heat dissipation is carried out by virtue of a heat dissipation mechanism in the cabinet, so that the problems of heat dissipation of all key devices on the board card of the control module and difficult heat dissipation of all key devices in the equipment are solved.
It should be noted that a network interface also exists on the control module board 1, and connection is performed for debugging an interface or planning unspecified equipment, so that the type and number of the network interface need to be extended through a switch.
In the embodiment of the present invention, as shown in fig. 4, the control module board 1 includes a power supply portion, and the power input module 100 includes an external power line connected to the control module board 1, and the external power line is routed to the surge protection module 200 through a PCB. The surge protection module 200 is wired through the PCB, and transmits power to the first power conversion module 300, and after voltage conversion, supplies power to the CPU processing module 600, the second power conversion module 400, and the LDO module 500, and after receiving the voltage of the first power conversion module 300, the second power conversion module 400 is wired through the PCB, and performs voltage conversion as its own input voltage, and supplies power to the LEU-U module 700, and the LDO module 500 supplies power to the ethernet transceiver module 800 and other peripheral modules 900.
Different modules have different power supply voltages, so different power supply access modules need to be divided to meet different voltage requirements of different modules.
In the embodiment of the present invention, the control module board 1 includes a first signal interaction portion, where the first signal interaction portion includes that the LTE-U module 700 receives, through a PRX main rf port 740 and a DRX secondary rf port 750 on a chip of the module itself, a first rf signal transmitted by a vehicle antenna through a feeder line, and converts the first rf signal into a first digital signal after being processed by the LTE-U module 700, where the CPU processing module 600 performs data interaction through the first USB port 610 and the second USB port 710 of the LTE-U module 700. After receiving the first digital signal, the CPU processing module 600 processes the first digital signal, and sends the obtained first valid signal to the ethernet transceiver module 800 through the third input/output port 650 in the CPU processing module 600 and the RMII input/output port 820 in the ethernet transceiver module 800. The ethernet transceiver module 800 receives the first valid signal, converts the first valid signal into a first physical layer signal after being processed by an internal chip, and sends the first physical layer signal to other devices through the physical layer transceiver interface 830.
The above embodiment is a signal interaction in a process of transmitting a signal from the ground device to the vehicle-mounted device. The method comprises signal receiving, signal processing and signal sending, wherein a first radio frequency signal is converted into a first physical signal and then sent to other required vehicle-mounted equipment.
It should be noted that, in this embodiment, after the signal is processed by the LTE-U module 700, the frequency band is converted by default, and an unlicensed spectrum of LTE is used.
In this embodiment of the present invention, the control module board 1 further includes a second signal interaction portion, where the second signal interaction portion includes receiving, through the physical layer transceiver interface 830, a second physical layer signal of the other device, sending the second physical layer signal to the ethernet transceiver module 800, and converting the second physical layer signal into a second effective signal after processing by an internal chip. According to the second valid signal, the second valid signal is sent to the CPU processing module 600 through the RMII i/o port 820 in the ethernet transceiver module 800 and the third i/o port 650 in the CPU processing module 600, and a second digital signal is obtained through processing. The second digital signal is sent to the LTE-U module 700 for processing, then converted into a second radio frequency signal, and sent to the vehicle-mounted antenna through the LTE-U module 700 via the PRX main radio frequency port 740 and the DRX sub radio frequency port 750 on the module's chip via the feeder.
The above embodiment is a signal interaction in a process of sending a signal to a ground device by a vehicle-mounted device. The method comprises the steps of signal receiving, frequency band conversion, signal processing and signal sending, wherein a second physical signal is converted into a second radio-frequency signal and then fed back to the ground equipment through the vehicle-mounted antenna.
It should be noted that, in this embodiment, after the signal is processed by the LTE-U module 700, the frequency band is converted by default, and an unlicensed spectrum of LTE is used.
In this embodiment of the present invention, the control module board 1 includes that the CPU processing module 600 sends a reset instruction to the reset interface 720 of the LTE-U module 700 through the first input/output port 620, so that the LTE-U module 700 is restarted by process interruption.
When a fault caused by non-hardware occurs, a reset instruction is sent out to cause the LTE-U module 100 to be restarted after process interruption to recover to a normal working state.
In the embodiment of the present invention, the switch board card 2 includes a power supply daughter board card 201 connected to a routing switch daughter board card 202 through a line.
The power daughter board card 201 includes a power interface, and may be powered by an external power source to the switch board card 2. The routing switch daughter board card 202 contains rich network interfaces for interfacing with vehicle-mounted devices requiring different network interfaces.
In this embodiment of the present invention, the control module board 1 includes a radio frequency enabling interface 730, where the second input/output port 630 of the CPU processing module 600 sends a radio frequency enabling instruction to the LTE-U module 700.
The radio frequency enabling instruction can wake up the LTE-U module 700, so that the LTE-U module 700 is started to perform functional use, thereby saving unnecessary energy consumption.
In the embodiment of the present invention, the control module board 1 includes a clock output 640 sending a clock signal to a clock input 810; wherein the clock output 640 belongs to the CPU processing module 600, and the clock input 810 belongs to the ethernet transceiver module 800.
The clock signal is used to ensure the operation of the synchronized parts.
In the embodiment of the present invention, the CPU processing module 600 includes a fourth input/output port 660 for performing data interaction with the peripheral module 900 through an interface.
The peripheral module 900 may be a memory chip or a USB chip. When the peripheral module 900 is the memory chip, an external memory function is provided, and when the peripheral module 900 is the USB chip, an external USB interface function is provided.
It should be noted that, in this embodiment, the peripheral module 900 is not limited, and for convenience of understanding, the storage chip and the USB chip are described as an example in this embodiment, and in an actual use process, when supported by the cpu, the peripheral module may be a variety of other external devices.
The embodiment of the utility model also provides a train which is characterized by comprising the TAU equipment and the train access unit. The beneficial effect of the train is the same as that of the train access unit, and is not described herein.
According to the utility model, the aim of not specially applying a special frequency band is achieved by converting the frequency band into the unauthorized frequency band through the control module board card, so that the problem of difficult application of frequency spectrum resources of TAU equipment based on LTE-M communication in the existing application of the industry is solved.
The technical solutions provided in the present application are described in detail above, and specific examples are applied herein to explain the principles and embodiments of the present application, and the descriptions of the above examples are only used to help understanding the present application, and the content of the present specification should not be construed as limiting the present application. While various modifications of the described embodiments and applications will be apparent to those skilled in the art in light of the disclosure herein, it is not desired to be exhaustive or exhaustive all of the embodiments and obvious variations or modifications are possible in light of the above teachings.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the true scope of the embodiments of the present invention.
Finally, it should also be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "include", "including" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or terminal device including a series of elements includes not only those elements but also other elements not explicitly listed or inherent to such process, method, article, or terminal device. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or terminal equipment comprising the element.
Claims (10)
1. The utility model provides a train access unit based on LTE-U communication comprises control module integrated circuit board (1), switch integrated circuit board (2), backplate connection integrated circuit board (3) and installation cage (4), its characterized in that includes:
the backboard connecting board card (3) comprises three backboard slots (301), and the control module board card (1) and the switch board card (2) are sequentially inserted into the backboard slots (301); the mounting machine cage is a hollow cuboid, and the backboard connecting board card (3) penetrates through the mounting machine cage (4) and the switch board card (2) and the control module board card (1).
2. The LTE-U communication-based train access unit according to claim 1, wherein the control module board (1) comprises a power supply part comprising:
the power input module (100) comprises an external power line connected with the control module board card (1) and is electrically connected to the surge protection module (200) through a PCB (printed circuit board) wire;
the surge protection module (200) transmits power to the first power conversion module (300) through PCB wiring, and supplies power to the CPU processing module (600), the second power conversion module (400) and the LDO module (500) after voltage conversion;
the second power conversion module (400) receives the voltage of the first power conversion module (300) through PCB wiring, and then performs voltage conversion as the input voltage of the second power conversion module to supply power to the LTE-U module (700);
The LDO module (500) supplies power to the Ethernet transceiver module (800) and the peripheral module (900).
3. The LTE-U communication-based train access unit according to claim 1, wherein the control module board (1) comprises a first signal interaction part, and the first signal interaction part comprises:
an LTE-U module (700) receives a first radio frequency signal transmitted by a vehicle-mounted antenna through a feeder line through a PRX main radio frequency port (740) and a DRX auxiliary radio frequency interface (750) on a chip of the module, and the first radio frequency signal is converted into a first digital signal after being processed by the LTE-U module (700), wherein a CPU processing module (600) carries out data interaction through a first USB interface (610) and a second USB interface (710) of the LTE-U module (700);
after receiving the first digital signal, the CPU processing module (600) processes the first digital signal, and sends an obtained first effective signal to the ethernet transceiver module (800) through a third input/output port (650) in the CPU processing module (600) and an RMII input/output port (820) in the ethernet transceiver module (800);
the Ethernet transceiver module (800) receives the first effective signal, converts the first effective signal into a first physical layer signal after being processed by an internal chip, and sends the first physical layer signal to external equipment through a physical layer transceiver interface (830).
4. The LTE-U communication-based train access unit according to claim 1, wherein the control module board (1) further comprises a second signal interaction part, and the second signal interaction part comprises:
receiving a second physical layer signal of the external equipment through a physical layer transceiving interface (830), sending the second physical layer signal to an Ethernet transceiver module (800), and converting the second physical layer signal into a second effective signal after being processed by an internal chip;
according to the second effective signal, the second effective signal is sent to the CPU processing module (600) through an RMII input-output port (820) in the Ethernet transceiver module (800) and a third input-output port (650) in the CPU processing module (600), and a second digital signal is obtained through processing;
the second digital signal is sent to an LTE-U module (700) to be processed and then converted into a second radio frequency signal, and the second radio frequency signal is sent to the vehicle-mounted antenna through a PRX main radio frequency port (740) and a DRX auxiliary radio frequency port (750) on a chip of the module through the LTE-U module (700) through a feeder line.
5. The LTE-U communication-based train access unit according to claim 1, wherein the control module board (1) comprises:
the CPU processing module (600) sends a reset instruction to a reset interface (720) of the LTE-U module (700) through a first input/output port (620), so that the LTE-U module (700) is restarted after process interruption.
6. The LTE-U communication based train access unit according to claim 1, wherein the switch board card (2) comprises:
the power supply daughter board card (201) is connected with the route switching daughter board card (202) through a line.
7. The LTE-U communication based train access unit of claim 1, wherein the control module board (1) comprises:
and a second input/output port (630) of the CPU processing module (600) sends out a radio frequency enabling instruction to a radio frequency enabling interface (730) of the LTE-U module (700).
8. The LTE-U communication based train access unit of claim 1, wherein the control module board (1) comprises:
a clock output (640) sends a clock signal to a clock input (810); wherein the clock output (640) belongs to a CPU processing module (600) and the clock input (810) belongs to an Ethernet transceiver module (800).
9. The LTE-U communication based train access unit of claim 2, wherein the CPU processing module (600) comprises:
and the fourth input/output port (660) performs data interaction with the peripheral module (900) through an interface.
10. A train comprising a TAU device and a train access unit according to claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121777219.4U CN216981920U (en) | 2021-07-30 | 2021-07-30 | Train access unit and train based on LTE-U communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121777219.4U CN216981920U (en) | 2021-07-30 | 2021-07-30 | Train access unit and train based on LTE-U communication |
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| Publication Number | Publication Date |
|---|---|
| CN216981920U true CN216981920U (en) | 2022-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121777219.4U Active CN216981920U (en) | 2021-07-30 | 2021-07-30 | Train access unit and train based on LTE-U communication |
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| CN (1) | CN216981920U (en) |
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- 2021-07-30 CN CN202121777219.4U patent/CN216981920U/en active Active
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