CN210137325U - GSM-R optical fiber repeater system - Google Patents
GSM-R optical fiber repeater system Download PDFInfo
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- CN210137325U CN210137325U CN201921432627.9U CN201921432627U CN210137325U CN 210137325 U CN210137325 U CN 210137325U CN 201921432627 U CN201921432627 U CN 201921432627U CN 210137325 U CN210137325 U CN 210137325U
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Abstract
The utility model provides a GSM-R optic fibre repeater system, the system includes: a near-end machine and a far-end machine; the near-end machine comprises an uplink three-way combiner, a downlink three-way splitter, a GSM-R optical fiber near-end main module, a GSM-R optical fiber near-end standby module, a GSM-R optical fiber near-end slave module and a near-end CWDM module; the remote machine comprises a GSM-R optical fiber remote main module, a GSM-R optical fiber remote standby module, a GSM-R optical fiber remote slave module, a downlink three-way combiner, a downlink power amplifier, an uplink three-way splitter, an uplink low-noise amplifier, a remote CWDM module and a duplexer. The utility model discloses a mode of module redundancy provides the hot backup function, has improved the reliability of GSM-R optic fibre repeater system.
Description
Technical Field
The utility model belongs to the technical field of GSM-R communication system, especially, relate to a GSM-R optic fibre repeater system.
Background
The GSM-R (Global System for Mobile Communications for railways) belongs to one of special Mobile Communications, is special for daily operation management of railways, and is a very effective dispatching command communication tool.
The reliability requirement of the railway mobile communication is higher than the requirement of a telecommunication operator, and any equipment fault is light, so that the communication quality is reduced, the switching is failed and the like, and the train control system is possibly degraded; and the railway communication in partial areas is completely interrupted, and the operation efficiency of the whole line is finally influenced. Therefore, it is urgent to improve the network structure, power stability, transmission channel stability and reliability maintenance of network field intensity coverage of the GSM-R optical fiber repeater system as much as possible under the condition of limited resources.
The GSM-R optical fiber repeater system consists of a near end and a far end. The GSM-R optical fiber repeater system is an optical fiber radio frequency remote product developed mainly based on the difficulty in site selection of an operator base station, too large investment in machine room construction and low resource utilization rate. The radio frequency signal is converted into an optical signal, the optical signal is further pulled to a coverage area through an optical cable mode, and a remote machine in the coverage area is recovered into the radio frequency signal to carry out system coverage.
The reliability of the repeater system applied to the public network at present can only meet the requirement of the public network application, and cannot meet the requirement of the railway application, so that the repeater system has great risk when being directly applied to a railway GSM-R system.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problem that the existing communication system cannot meet the reliability requirement of the railway GSM-R system or at least partially solve the problem, the embodiment of the utility model provides a GSM-R optical fiber repeater system.
According to a first aspect of the embodiments of the present invention, a GSM-R optical fiber repeater system is provided, which includes a near-end machine and a far-end machine;
the near-end machine comprises an uplink three-way combiner, a downlink three-way splitter, a GSM-R optical fiber near-end main module, a GSM-R optical fiber near-end standby module, a GSM-R optical fiber near-end slave module and a near-end CWDM module;
the remote machine comprises a GSM-R optical fiber remote main module, a GSM-R optical fiber remote standby module, a GSM-R optical fiber remote slave module, a downlink three-way combiner, a downlink power amplifier, an uplink three-way splitter, an uplink low-noise amplifier, a remote CWDM module and a duplexer;
the GSM-R optical fiber near-end main module, the GSM-R optical fiber near-end standby module and the GSM-R optical fiber near-end slave module simultaneously and independently work, and are used for converting radio frequency signals transmitted by a base station into optical signals on a downlink, combining the optical signals through the near-end CWDM module and transmitting the combined optical signals to the far-end machine; converting the optical signal sent by the remote terminal into a radio frequency signal after an uplink receives the optical signal, and sending the radio frequency signal to the three-way combiner;
the downlink three-way splitter is used for splitting the radio-frequency signals transmitted by the base station on a downlink and then transmitting the radio-frequency signals to the GSM-R optical fiber near-end main module, the GSM-R optical fiber near-end standby module and the GSM-R optical fiber near-end slave module;
the uplink three-way combiner is used for combining the radio frequency signals converted by the GSM-R optical fiber near-end main module, the GSM-R optical fiber near-end standby module and the GSM-R optical fiber near-end slave module on an uplink and then sending the combined radio frequency signals to the base station;
the GSM-R optical fiber far-end main module, the GSM-R optical fiber far-end standby module and the GSM-R optical fiber far-end slave module simultaneously and independently work, and are used for receiving an optical signal sent by the near-end machine on a downlink, converting the optical signal into a radio frequency signal and sending the radio frequency signal to the downlink three-way combiner; converting the radio-frequency signal split by the uplink three-way splitter into an optical signal on an uplink, combining the optical signal by the far-end CWDM module, and sending the combined optical signal to the near-end machine;
the downlink three-way combiner is used for combining the radio frequency signals and then sending the combined radio frequency signals to the downlink power amplifier;
the downlink power amplifier is used for amplifying the radio frequency signal and then transmitting the radio frequency signal to a mobile station through the duplexer;
the uplink low-noise amplifier is used for transmitting the radio-frequency signal to the uplink three-way branching unit after the radio-frequency signal transmitted by the mobile station passes through the duplexer and then amplifies the radio-frequency signal.
The embodiment of the utility model provides a GSM-R optic fibre repeater system, this system has the owner, be equipped with, from GSM-R optic fibre near-end module and owner, be equipped with, from GSM-R optic fibre far-end module, three GSM-R optic fibre near-end module is simultaneously and the autonomous working, three GSM-R optic fibre far-end module is simultaneously and the autonomous working, not only have the owner, be equipped with the link, support the signal receiving and dispatching from the link, arbitrary link breaks down, all do not influence the work of other links, thereby pass through the redundant mode of module, provide the hot backup function, the reliability of GSM-R optic fibre repeater system has been improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a near-end photoelectric signal conversion process in a GSM-R optical fiber repeater system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a far-end photoelectric signal conversion process in a GSM-R optical fiber repeater system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a data transmission process in a GSM-R optical fiber repeater system according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a power module structure in a GSM-R optical fiber repeater system provided by an embodiment of the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
The embodiment of the utility model provides a GSM-R optical fiber repeater system, which comprises a near-end machine and a far-end machine; the near-end machine comprises an uplink three-way combiner, a downlink three-way splitter, a GSM-R optical fiber near-end main module, a GSM-R optical fiber near-end standby module, a GSM-R optical fiber near-end slave module and a near-end CWDM module;
the GSM-R optical fiber near-end main module, the GSM-R optical fiber near-end standby module and the GSM-R optical fiber near-end slave module simultaneously and independently work, and are used for converting radio frequency signals transmitted by a base station into optical signals on a downlink, combining the optical signals through the near-end CWDM module and transmitting the combined optical signals to the far-end machine; converting the optical signal sent by the remote terminal into a radio frequency signal after an uplink receives the optical signal, and sending the radio frequency signal to the three-way combiner;
the downlink three-way splitter is used for splitting the radio-frequency signals transmitted by the base station on a downlink and then transmitting the radio-frequency signals to the GSM-R optical fiber near-end main module, the GSM-R optical fiber near-end standby module and the GSM-R optical fiber near-end slave module;
the uplink three-way combiner is used for combining the radio frequency signals converted by the GSM-R optical fiber near-end main module, the GSM-R optical fiber near-end standby module and the GSM-R optical fiber near-end slave module on an uplink and then sending the combined radio frequency signals to the base station;
specifically, as shown in fig. 1, the near-end device includes three GSM-R fiber near-end modules, which respectively implement the functions of active, standby, and dependent. The three GSM-R optical fiber near-end modules work simultaneously and are independent from each other. And when any GSM-R optical fiber near-end module fails, the working states of other GSM-R optical fiber near-end modules are not affected.
In a downlink, a radio frequency signal transmitted by a Base Station (BS) is coupled, then split by a downlink three-way splitter, and then enter three GSM-R fiber near-end modules, which convert the radio frequency signal into an optical signal, and then enter a CWDM (sparse Wavelength Division multiplexing) module in a near-end machine for multiplexing and then transmit the optical signal to a far-end machine through an optical cable. The three GSM-R optical fiber near-end modules work independently, and the near-end monitoring module detects and controls the working state of the three GSM-R optical fiber near-end modules.
In an uplink, the three GSM-R fiber near-end modules receive optical signals transmitted by the far-end machine through the optical cable, convert the optical signals into radio-frequency signals, and enter the base station through the uplink three-way combiner and the coupler.
The remote machine comprises a GSM-R optical fiber remote main module, a GSM-R optical fiber remote standby module, a GSM-R optical fiber remote slave module, a downlink three-way combiner, a downlink power amplifier, an uplink three-way splitter, an uplink low-noise amplifier, a remote CWDM module and a duplexer;
the GSM-R optical fiber far-end main module, the GSM-R optical fiber far-end standby module and the GSM-R optical fiber far-end slave module simultaneously and independently work, and are used for receiving an optical signal sent by the near-end machine on a downlink, converting the optical signal into a radio frequency signal and sending the radio frequency signal to the downlink three-way combiner; converting the radio frequency signal split by the uplink three-way splitter into an optical signal on an uplink, multiplexing the optical signal by the far-end CWDM module, and then sending the optical signal to the near-end machine;
the downlink three-way combiner is used for combining the radio frequency signals and then sending the combined radio frequency signals to the downlink power amplifier;
the downlink power amplifier is used for amplifying the radio frequency signal and then transmitting the radio frequency signal to a mobile station through the duplexer;
the uplink low-noise amplifier is used for transmitting the radio-frequency signal to the uplink three-way branching unit after the radio-frequency signal transmitted by the mobile station passes through the duplexer and then amplifies the radio-frequency signal.
Specifically, as shown in fig. 2, the remote device includes three GSM-R fiber remote modules, which respectively implement the functions of active, standby, and slave. The three GSM-R optical fiber remote modules work simultaneously and are independent from each other. And when any GSM-R optical fiber far-end module fails, the working states of other GSM-R optical fiber near-end modules are not affected.
In the downlink, the three GSM-R fiber remote modules respectively receive optical signals transmitted by the near-end machine, and restore the optical signals to radio frequency signals, and the radio frequency signals enter the downlink power amplifier through the downlink three-way combiner to be amplified and output to a Mobile Station (MS) port through the duplexer. The three GSM-R optical fiber remote modules work independently. The remote monitoring module detects and controls the working state of the power supply module in the remote machine, and has a remote monitoring and management function.
In the uplink, the radio frequency signal transmitted by the mobile station enters an uplink low noise amplifier through a duplexer, then passes through three GSM-R fiber far-end modules, is modulated into an optical signal, then enters a CWDM module in the far-end machine, is combined and then is transmitted to the near-end machine.
The GSM-R optical fiber repeater system in the embodiment is provided with a master GSM-R optical fiber near-end module, a backup GSM-R optical fiber near-end module, a master GSM-R optical fiber far-end module, a backup GSM-R optical fiber far-end module and a slave GSM-R optical fiber far-end module, wherein the three GSM-R optical fiber near-end modules work simultaneously and independently, the master GSM-R optical fiber far-end module and the slave GSM-R optical fiber far-end module not only have a master link and a backup link and support signal receiving and sending of the slave links, and any link fails without affecting the work of other links, so that a hot backup function is provided in a module redundancy.
On the basis of the above embodiment, in this embodiment, the GSM-R fiber near-end host module is configured to convert an optical signal sent by the GSM-R fiber far-end host module into a radio frequency signal after an uplink receives the optical signal; the GSM-R optical fiber near-end standby module is used for converting an optical signal sent by the GSM-R optical fiber far-end standby module into a radio frequency signal after an uplink receives the optical signal; the GSM-R optical fiber near-end slave module is used for converting an optical signal sent by the GSM-R optical fiber far-end slave module into a radio frequency signal after an uplink receives the optical signal;
the GSM-R optical fiber far-end main module is used for receiving an optical signal sent by the GSM-R optical fiber near-end main module on a downlink and then converting the optical signal into a radio frequency signal; the GSM-R optical fiber far-end standby module is used for converting an optical signal sent by the GSM-R optical fiber near-end standby module into a radio-frequency signal after receiving the optical signal on a downlink; and the GSM-R optical fiber far-end slave module is used for converting the optical signal sent by the GSM-R optical fiber near-end slave module into a radio frequency signal after receiving the optical signal on a downlink.
Specifically, in this embodiment, the GSM-R fiber near-end master module communicates with the GSM-R fiber far-end master module, the GSM-R fiber near-end backup module communicates with the GSM-R fiber far-end backup module, and the GSM-R fiber near-end slave module communicates with the GSM-R fiber far-end slave module.
On the basis of the above embodiment, the near-end CWDM module in this embodiment includes a near-end master CWDM module, a near-end standby CWDM module, and a near-end slave CWDM module; the remote CWDM module comprises a remote master CWDM module, a remote standby CWDM module and a remote slave CWDM module;
the near-end main CWDM module is used for multiplexing the optical signal sent by the GSM-R optical fiber near-end main module on a downlink and demultiplexing the optical signal sent by the GSM-R optical fiber far-end main module on an uplink; the near-end standby CWDM module is used for multiplexing the optical signals sent by the GSM-R optical fiber near-end standby module on a downlink and demultiplexing the optical signals sent by the GSM-R optical fiber far-end standby module on an uplink; the near-end slave CWDM module is used for multiplexing the optical signal sent by the GSM-R optical fiber near-end slave module on a downlink and demultiplexing the optical signal sent by the GSM-R optical fiber far-end slave module on an uplink;
the remote main CWDM module is used for multiplexing the optical signal sent by the GSM-R optical fiber remote main module on an uplink and demultiplexing the optical signal sent by the GSM-R optical fiber near-end main module on a downlink; the far-end standby CWDM module is used for multiplexing the optical signal sent by the GSM-R optical fiber far-end standby module on an uplink and demultiplexing the optical signal sent by the GSM-R optical fiber near-end standby module on a downlink; the far-end slave CWDM module is used for multiplexing the optical signal sent by the GSM-R optical fiber far-end slave module on an uplink and demultiplexing the optical signal sent by the GSM-R optical fiber near-end slave module on a downlink.
Specifically, in this embodiment, the near-end master CWDM module communicates with the far-end master CWDM module, the near-end backup CWDM module communicates with the far-end backup CWDM module, and the near-end slave CWDM module communicates with the far-end slave CWDM module.
On the basis of the above embodiments, in this embodiment, the GSM-R fiber near-end master module, the GSM-R fiber near-end standby module, the GSM-R fiber near-end slave module, the GSM-R fiber near-end master module, the GSM-R fiber near-end standby module, and the GSM-R fiber near-end slave module each include an optical transmission unit, an optical reception unit, and an FSK (Frequency shift keying, digital Frequency modulation) communication unit;
the optical transmitting unit comprises an optical modulator and an optical power controller, and the optical modulator and the optical power controller are used for converting a radio frequency signal into an optical signal;
the optical power controller is an optical power automatic control circuit or an optical power manual control circuit. In addition, the light emitting unit further comprises a light emitting switch circuit and a light alarm circuit. The light emission switch circuit is used for manually controlling light emission, and the light alarm circuit is used for giving an alarm when the received light is weak.
In the downlink, after a radio frequency signal transmitted by a base station enters a GSM-R fiber near-end module, the radio frequency signal is modulated into an optical signal, such as an 1550/1310nm optical signal, by an optical modulator and an optical power controller.
In the uplink, a radio frequency signal transmitted by a mobile station, such as a handheld terminal, enters an uplink low-noise amplifier, such as a radio frequency signal amplified to-30 to-10 dBm, and is modulated into an optical signal, such as an optical signal of 1550/1310nm, through an optical modulator and an optical power controller of a GSM-R fiber remote module.
The optical receiving unit comprises an optical demodulator and a gain digital controller, wherein the optical demodulator and the gain digital controller are used for converting an optical signal into a radio frequency signal;
the light receiving unit also comprises a received light intensity detection circuit and an alarm circuit. The receiving light intensity detection circuit is used for detecting the intensity of the receiving light, and the alarm circuit is used for giving an alarm when the receiving light intensity is not within a preset range, and has an automatic monitoring and alarm function.
In an uplink, the GSM-R fiber near-end module receives an optical signal transmitted by a far-end machine, converts the optical signal into a radio frequency signal through an optical demodulator and gain digital control, for example, converts the radio frequency signal into a radio frequency signal with a size of-10 to 0dBm, and enters a base station through an uplink three-way combiner and a coupler.
In a downlink, the GSM-R optical fiber far-end module receives an optical signal transmitted by a near-end machine, and the optical signal is converted into a radio frequency signal with the size of-20 dBm to-10 dBm through an optical demodulator and gain digital control.
The FSK communication unit is used for communication between the near-end machine and the far-end machine.
The FSK communication unit mainly comprises a controller, a modem and a radio frequency coupling circuit and is used for communication between the near-end machine and the far-end machine.
On the basis of the above embodiment, in this embodiment, the downlink power amplifier includes a first radio frequency switch, a second radio frequency switch, a downlink main power amplifier, and a downlink standby power amplifier; the first radio frequency switch is connected with the downlink three-way combiner, and the second radio frequency switch is connected with the duplexer;
the first radio frequency switch and the second radio frequency switch are used for switching between the downlink main power amplifier and the downlink standby power amplifier
Specifically, as shown in fig. 2, the inputs of the downlink main power amplifier and the downlink standby power amplifier are switched by the first radio frequency switch, and the outputs of the downlink main power amplifier and the downlink standby power amplifier are switched by the second radio frequency switch. The GSM-R optical fiber repeater system can automatically detect the working state of the downlink main power amplifier or the downlink standby power amplifier, and can switch two radio frequency switches according to the working state or manually switch.
The switching principle of the radio frequency switch is as follows: in the initial state, a downlink main power amplifier is switched on, and a downlink standby power amplifier is switched off; when a fault alarm of the downlink main power amplifier is detected, closing a radio frequency switch of the downlink main power amplifier and reporting to an alarm platform; and opening a radio frequency switch of the downlink standby power amplifier.
The utility model discloses used radio frequency switch to carry out intelligence switching to owner and reserve power amplifier, its insertion loss is littleer, and the switching time is shorter.
On the basis of the above embodiment, in this embodiment, the near-end device further includes a first gateway switch and a first photoelectric conversion module; the remote machine further comprises a second network port switch and a second photoelectric conversion module;
the first network port switch is used for sending input near-end transmission data to the first photoelectric conversion module; the first photoelectric conversion module is used for modulating the near-end transmission data into optical signals with various optical wavelengths and then sending the optical signals to the near-end CWDM module; the near-end CWDM module is also used for multiplexing the optical signals with various wavelengths and then sending the multiplexed optical signals to the far-end CWDM module; the far-end CWDM module is also used for demultiplexing the optical signals with the multiple wavelengths and then sending the optical signals to the second photoelectric conversion module; the second photoelectric conversion module is configured to convert the demultiplexed optical signal into an electrical port signal and send the electrical port signal to the second network port switch, so as to send the electrical port signal to the mobile station through the network port of the second network port switch;
specifically, the railway GSM-R system requires to have a function of transmitting a large amount of service data in addition to scheduling voice communication, and according to the requirements of GSM-R network resources and various data services, only the GSM-R communication system is relied on to carry the data services, and both the bandwidth and the delay of the GSM-R communication system do not meet the requirements. The traditional GSM-R optical fiber repeater system does not have the data transmission function; in this embodiment, the establishment of the primary, secondary and primary data transmission channels is realized by using the network port switch and the CWDM module.
As shown in fig. 3, data to be transmitted is forwarded to 3 optical ports, such as 100Base-FX, through an electrical port of a near-end switch, such as an electrical port RJ45 of 10/100Base-t (x), and is multiplexed with optical signals of three GSM-R fiber near-end modules in a CWDM module, and the near-end switch outputs 3 channels including modulated radio frequency signals and data transmission path signals. The CWDM module in the remote machine demultiplexes the optical signal, and the optical signal is converted into an electric port signal by an optical-electrical converter and converged at a remote exchanger. When there are multiple near-end CWDM modules and multiple far-end CWDM modules, the data to be transmitted is multiplexed in all CWDM modules through the electric port of the near-end switch, and the corresponding CWDM module in the far-end machine demultiplexes the optical signal. The second network port switch is also used for sending the input far-end transmission data to the second photoelectric conversion module; the second photoelectric conversion module is further configured to modulate the far-end transmission data into optical signals of multiple optical wavelengths and send the optical signals to the far-end CWDM module; the far-end CWDM module is also used for multiplexing the optical signals with various wavelengths and then sending the multiplexed optical signals to the near-end CWDM module; the near-end CWDM module is further configured to demultiplex the optical signals with multiple wavelengths sent by the far-end CWDM module and send the optical signals to the first photoelectric conversion module; the first photoelectric conversion module is further configured to convert the demultiplexed optical signal into an electrical port signal and send the electrical port signal to the first network port switch, so that the electrical port signal is sent to the near-end data processing center through the network port of the first network port switch.
As shown in fig. 3, the data at the far end is transmitted to the network port switch through the network port, and then transmitted to the photoelectric conversion module to be modulated into different optical wavelengths. The CWDM module combines the optical signals with different wavelengths and transmits the combined optical signals to the near-end machine through the optical cable; the near-end machine is sent to the near-end data processing center through the CWDM module, the photoelectric conversion module and the network port switch.
In order to avoid broadcast storm caused by looped network formation, in the embodiment, the network port switches in the near-end machine and the far-end machine adopt industrial switches supporting spanning tree protocols, so that a data transmission path network is more stable, and reliability and safety can be greatly enhanced.
The GSM-R optical fiber repeater system in the embodiment provides a data transmission interface for railway communication equipment, an Ethernet interface supporting more than 100M of data transmission can be connected to a local man-machine interface through a GSM MODEM or other modes, the same function as the local interface is realized, and parameter inquiry and setting can be performed through the local RS-232 interface.
On the basis of the above embodiments, the present embodiment further includes a power supply module, where the power supply module is used to supply power to the GSM-R optical fiber repeater system; the power supply module comprises a main power supply and a standby power supply; the main power supply and the standby power supply are respectively connected with a power supply port in the GSM-R optical fiber repeater system through a diode.
As shown in fig. 4, the primary power source in the power module is connected to the power supply port through a diode D1, and the standby power source is connected to the power supply port through a diode D2. The voltage of the main power supply is 0.7-0.9V higher than that of the standby power supply, for example, the voltage of the main power supply is 28.7V, and the voltage of the standby power supply is 28V. Due to the reverse cut-off characteristic of the diode, the power is supplied by the main power supply under normal conditions, and when the main power supply fails and does not output, the power is automatically switched to the standby power supply for supplying power. The embodiment supports the power supply backup function, and is low in cost and high in reliability.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. A GSM-R optical fiber repeater system is characterized by comprising a near-end machine and a far-end machine;
the near-end machine comprises an uplink three-way combiner, a downlink three-way splitter, a GSM-R optical fiber near-end main module, a GSM-R optical fiber near-end standby module, a GSM-R optical fiber near-end slave module and a near-end CWDM module;
the remote machine comprises a GSM-R optical fiber remote main module, a GSM-R optical fiber remote standby module, a GSM-R optical fiber remote slave module, a downlink three-way combiner, a downlink power amplifier, an uplink three-way splitter, an uplink low-noise amplifier, a remote CWDM module and a duplexer;
the GSM-R optical fiber near-end main module, the GSM-R optical fiber near-end standby module and the GSM-R optical fiber near-end slave module simultaneously and independently work, and are used for converting radio frequency signals transmitted by a base station into optical signals on a downlink, multiplexing the optical signals through the near-end CWDM module and transmitting the optical signals to the far-end machine; converting the optical signal sent by the remote terminal into a radio frequency signal after an uplink receives the optical signal, and sending the radio frequency signal to the three-way combiner;
the downlink three-way splitter is used for splitting the radio-frequency signals transmitted by the base station on a downlink and then transmitting the radio-frequency signals to the GSM-R optical fiber near-end main module, the GSM-R optical fiber near-end standby module and the GSM-R optical fiber near-end slave module;
the uplink three-way combiner is used for combining the radio frequency signals converted by the GSM-R optical fiber near-end main module, the GSM-R optical fiber near-end standby module and the GSM-R optical fiber near-end slave module on an uplink and then sending the combined radio frequency signals to the base station;
the GSM-R optical fiber far-end main module, the GSM-R optical fiber far-end standby module and the GSM-R optical fiber far-end slave module simultaneously and independently work, and are used for receiving an optical signal sent by the near-end machine on a downlink, converting the optical signal into a radio frequency signal and sending the radio frequency signal to the downlink three-way combiner; converting the radio frequency signal split by the uplink three-way splitter into an optical signal on an uplink, multiplexing the optical signal by the far-end CWDM module, and then sending the optical signal to the near-end machine;
the downlink three-way combiner is used for combining the radio frequency signals and then sending the combined radio frequency signals to the downlink power amplifier;
the downlink power amplifier is used for amplifying the radio frequency signal and then transmitting the radio frequency signal to a mobile station through the duplexer;
the uplink low-noise amplifier is used for transmitting the radio-frequency signal to the uplink three-way branching unit after the radio-frequency signal transmitted by the mobile station passes through the duplexer and then amplifies the radio-frequency signal.
2. The GSM-R fiber optic repeater system according to claim 1,
the GSM-R optical fiber near-end main module is used for converting an optical signal sent by the GSM-R optical fiber far-end main module into a radio frequency signal after an uplink receives the optical signal; the GSM-R optical fiber near-end standby module is used for converting an optical signal sent by the GSM-R optical fiber far-end standby module into a radio frequency signal after an uplink receives the optical signal;
the GSM-R optical fiber near-end slave module is used for converting an optical signal sent by the GSM-R optical fiber far-end slave module into a radio frequency signal after an uplink receives the optical signal;
the GSM-R optical fiber far-end main module is used for receiving an optical signal sent by the GSM-R optical fiber near-end main module on a downlink and then converting the optical signal into a radio frequency signal;
the GSM-R optical fiber far-end standby module is used for converting an optical signal sent by the GSM-R optical fiber near-end standby module into a radio-frequency signal after receiving the optical signal on a downlink;
and the GSM-R optical fiber far-end slave module is used for converting the optical signal sent by the GSM-R optical fiber near-end slave module into a radio frequency signal after receiving the optical signal on a downlink.
3. The GSM-R fiber repeater system according to claim 2, wherein the near-end CWDM module comprises a near-end master CWDM module, a near-end backup CWDM module and a near-end slave CWDM module;
the remote CWDM module comprises a remote master CWDM module, a remote standby CWDM module and a remote slave CWDM module;
the near-end main CWDM module is used for multiplexing the optical signal sent by the GSM-R optical fiber near-end main module on a downlink and demultiplexing the optical signal sent by the GSM-R optical fiber far-end main module on an uplink;
the near-end standby CWDM module is used for multiplexing the optical signals sent by the GSM-R optical fiber near-end standby module on a downlink and demultiplexing the optical signals sent by the GSM-R optical fiber far-end standby module on an uplink;
the near-end slave CWDM module is used for multiplexing the optical signal sent by the GSM-R optical fiber near-end slave module on a downlink and demultiplexing the optical signal sent by the GSM-R optical fiber far-end slave module on an uplink;
the remote main CWDM module is used for multiplexing the optical signal sent by the GSM-R optical fiber remote main module on an uplink and demultiplexing the optical signal sent by the GSM-R optical fiber near-end main module on a downlink;
the far-end standby CWDM module is used for multiplexing the optical signal sent by the GSM-R optical fiber far-end standby module on an uplink and demultiplexing the optical signal sent by the GSM-R optical fiber near-end standby module on a downlink;
the far-end slave CWDM module is used for multiplexing the optical signal sent by the GSM-R optical fiber far-end slave module on an uplink and demultiplexing the optical signal sent by the GSM-R optical fiber near-end slave module on a downlink.
4. The GSM-R optical fiber repeater system according to claim 1, wherein the GSM-R optical fiber near-end master module, the GSM-R optical fiber near-end standby module, the GSM-R optical fiber near-end slave module, the GSM-R optical fiber near-end master module, the GSM-R optical fiber near-end standby module and the GSM-R optical fiber near-end slave module respectively comprise an optical transmitting unit, an optical receiving unit and an FSK communication unit;
the optical transmitting unit comprises an optical modulator and an optical power controller, and the optical modulator and the optical power controller are used for converting a radio frequency signal into an optical signal;
the optical receiving unit comprises an optical demodulator and a gain digital controller, wherein the optical demodulator and the gain digital controller are used for converting an optical signal into a radio frequency signal;
the FSK communication unit is used for communication between the near-end machine and the far-end machine.
5. The GSM-R fiber repeater system according to claim 1, wherein the downlink power amplifier comprises a first radio frequency switch, a second radio frequency switch, a downlink main power amplifier and a downlink standby power amplifier;
the first radio frequency switch is connected with the downlink three-way combiner, and the second radio frequency switch is connected with the duplexer;
the first radio frequency switch and the second radio frequency switch are used for switching between the downlink main power amplifier and the downlink standby power amplifier.
6. The GSM-R fiber optic repeater system according to claim 1, wherein the near-end machine further comprises a first gateway switch and a first photoelectric conversion module;
the remote machine further comprises a second network port switch and a second photoelectric conversion module;
the first network port switch is used for sending input near-end transmission data to the first photoelectric conversion module;
the first photoelectric conversion module is used for modulating the near-end transmission data into optical signals with various optical wavelengths and then sending the optical signals to the near-end CWDM module;
the near-end CWDM module is also used for multiplexing the optical signals with various wavelengths and then sending the multiplexed optical signals to the far-end CWDM module;
the far-end CWDM module is also used for demultiplexing the optical signals with the multiple wavelengths and then sending the optical signals to the second photoelectric conversion module;
the second photoelectric conversion module is configured to convert the demultiplexed optical signal into an electrical port signal and send the electrical port signal to the second network port switch, so as to send the electrical port signal to the mobile station through the network port of the second network port switch;
the second network port switch is also used for sending the input far-end transmission data to the second photoelectric conversion module;
the second photoelectric conversion module is further configured to modulate the far-end transmission data into optical signals of multiple optical wavelengths and send the optical signals to the far-end CWDM module;
the far-end CWDM module is also used for multiplexing the optical signals with various wavelengths and then sending the multiplexed optical signals to the near-end CWDM module;
the near-end CWDM module is further configured to demultiplex the optical signals with multiple wavelengths sent by the far-end CWDM module and send the optical signals to the first photoelectric conversion module;
the first photoelectric conversion module is further configured to convert the demultiplexed optical signal into an electrical port signal and send the electrical port signal to the first network port switch, so that the electrical port signal is sent to the near-end data processing center through the network port of the first network port switch.
7. The GSM-R fiber optic repeater system according to any one of claims 1 to 6, further comprising a power module for supplying power to the GSM-R fiber optic repeater system;
the power supply module comprises a main power supply and a standby power supply;
the main power supply and the standby power supply are respectively connected with a power supply port in the GSM-R optical fiber repeater system through a diode.
8. The GSM-R fiber optic repeater system according to claim 6, wherein the first portal switch and the second portal switch are industrial grade switches supporting spanning tree protocol.
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