KR101492840B1 - Wireless repeater for tunnel - Google Patents

Abstract

The present invention relates to a radio relay apparatus for tunnels, and more particularly, to a radio relay apparatus for tunnels, more particularly, to a radio relay apparatus for tunnels, The present invention relates to a radio relay for a tunnel in which services of mobile communication can be smoothly provided in a shadow zone.

Description

[0001] The present invention relates to a wireless repeater for tunnel,

The present invention relates to a radio relay apparatus for tunnels, and more particularly, to a radio relay apparatus for tunnels, more particularly, to a radio relay apparatus for tunnels, The present invention relates to a radio relay for a tunnel in which services of mobile communication can be smoothly provided in a shadow zone.

In the construction of roads and railways, it has been constructed so as to avoid the mountainous terrain until now. However, as a result of the straightening work for the purpose of shortening the section, the tunnel length of the unit section becomes longer and the number of the tunnel is increased.

In the vicinity of the tunnel of the road or the railway section, in the case of listening to the over-the-air broadcast or providing the bidirectional mobile communication service, since it is a mountainous terrain, the loss of radio waves occurs and the hearing loss is caused.

In addition, large underground tunnels for improvement of traffic in urban areas, and underground tunnels for the improvement of traffic between underground roads and metropolitan cities have been on the increase.

In addition, in recent years, as the moving speed of the road or railroad becomes faster, the number of broadcasting and communication areas is mixed in the moving section. For example, in the case of a large-scale large-scale underpass, broadcasting and communication areas of a tunnel start point, an end point, and an intermediate entry / exit lamp are different, and a wide-area subway diagram of a large city varies in song and communication areas .

Particularly, the conventional terrestrial broadcasting rebroadcasting device or mobile communication repeater for the underground shaded area has been provided with a single receiving aerial to provide a service in a unit area. However, as described above, There is a problem in that reception and transmission of broadcasting and mobile communication are not convenient because there is a limit in service provision when there is a demand.

In addition, since the conventional wide area receiving apparatus is installed in only one location in a certain area, communication in the corresponding area may be paralyzed when troubles such as malfunction or power failure occur, but there is no countermeasure in the past.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method and apparatus for transmitting a plurality of identical frequencies to a signal received at each wide- And a radio relay apparatus for a tunnel that can selectively determine a frequency of a received signal allocated to the radio relay apparatus.

Another object of the present invention is to allocate a frequency table of each wide area receiving apparatus so that a wide area receiving apparatus in a specific place can bypass when a fault such as a failure or a power failure occurs, In a wireless relay apparatus for a tunnel capable of reassignment to a tunnel. And a radio relay device for tunnels.

The present invention includes the following embodiments in order to achieve the above object.

The first embodiment of the present invention is a radio communication system comprising at least one receiving antenna for receiving and receiving a mobile communication signal, which is installed in an area within a road or a railroad section where radio signals can be transmitted easily; At least one transmitting antenna for transmitting and receiving a mobile communication signal of an airwave installed in a tunnel in which a road or a railroad is installed; An optical cable extending in the tunnel and transmitting / receiving signals input / output from the reception antenna and the transmission antenna in both directions; Each of which has a different frequency assigned thereto, determines a channel of a signal input / output from the transmission antenna and the reception antenna, converts different frequency signals into frequencies of the same band, synthesizes and branches the signals, and outputs the combined signals to the optical cable in both directions. ; A third wide-area transceiver for sensing a waveform output from the at least one wide-area transceiver; And a remote controller for receiving an output detection signal of the at least one wide area transceiver unit sensed by the third wide area transceiver unit and determining whether there is an abnormality due to a power failure or a malfunction, wherein the remote controller controls the at least one wide area transceiver unit And a frequency allocated to the wide area transmission / reception unit in which the abnormality is generated is reallocated to the adjacent one of the other wide area transmission / reception units.

In the second embodiment of the present invention, the reception antenna is a donor antenna capable of receiving an airwave signal and transmitting / receiving a mobile communication signal, and includes at least one region in which a radio signal can be easily transmitted And transmits the received signal to one of the one or more wide-area transceivers.

In the third embodiment of the present invention, the transmission antenna is one or more remote antennas (Remote Antenna) capable of transmitting and receiving a public-air signal and a mobile communication signal, and is connected to any one of the one or more wide- And is installed in the tunnel.

In the fourth embodiment of the present invention, the at least one wide-area transceiver includes a first wide-area transceiver for converting a signal received from the receiving antenna into a frequency allocated in the remote controller, amplifying the received signal and outputting the amplified signal in both directions of the optical cable; Converts a signal applied through the optical cable to a frequency allocated by the remote controller, amplifies and outputs the signal to the transmission antenna, or converts a signal inputted from the transmission antenna into a frequency allocated in the remote controller, amplifies the signal, A second wide-range transmission / reception unit for outputting the second wide- And a third wide-area transceiver for converting the signal output from the receiving antenna or the other wide-area transmitter into a frequency allocated to the remote controller, and outputting the converted signal to the transmitting antenna and the optical cable.

In the fifth embodiment of the present invention, the first wide-area transceiver includes: a first multiplexer for sharing a frequency for transmitting a reception signal to the optical cable; First amplifying means for amplifying the received signal by low noise and amplifying the transmitted signal by high output; First channel selecting means for selecting, amplifying and outputting a channel of a received signal according to a frequency allocated by the remote control unit; First frequency conversion means for converting an intermediate frequency applied from the channel selection means into a carrier wave; First signal converting means for removing noise after mixing signals of different bands among the signals output from the frequency converting means, dividing the mixed signal into original signals, and branching the mixed signals to the optical cable in both directions; And first switching means for electrically connecting or disconnecting the optical cable and the output side of the signal converting means under the control of the remote controller.

In the sixth embodiment of the present invention, the second wide-area transceiver includes a second switching means for connecting or disconnecting the line so that input and output of the optical cable and the signal can be performed; Second signal conversion means for converting a received signal inputted from the optical cable connected through the second transfer means into a signal having a frequency band allocated by the remote control section, amplifying the signal, and outputting the amplified signal; Second frequency conversion means for converting the intermediate frequency signal output from the second signal conversion means into a carrier signal; Second amplifying means for amplifying a signal output from said second frequency converting means; And a duplexer for matching the signal amplified by the second amplifying means with the transmission direction of the transmission antenna and outputting the signal to the transmission antenna.

In the seventh embodiment of the present invention, the third wide-area transceiver includes a third common unit for sharing a signal received by the reception antenna with a signal coinciding with the optical cable; Third amplifying means for amplifying a received signal output from said shared unit; Second channel selecting means for converting the channel of the signal amplified by the third amplifying means into the selected channel according to the assigned frequency; A third frequency conversion means for converting the signal of the selected channel output from the second channel selection means to an intermediate frequency and outputting the signal; Third signal converting means for mixing the different signals outputted from the frequency converting means into signals of the same frequency band to remove noise and for branching the mixed signal in both directions and outputting the mixed signals; Third switching means for connecting or disconnecting the line so as to enable input and output of signals of the optical cable with the signal converting means under the control of the remote control unit; A fourth frequency conversion means for converting the intermediate frequency signal output from the signal conversion means into a carrier wave; Fourth amplifying means for amplifying the signal converted by said fourth frequency converting means; And a fourth multiplexer for outputting a signal output from the fourth amplifying unit in accordance with the direction of the transmission antenna.

In the eighth embodiment of the present invention, the first and second channel selection means generate an individual filter coefficient (FIR Filter) of a channel required for the frequency allocated by the remote control unit, match the set reference value with the input signal Synthesized into a final filter coefficient, applied as individual filter coefficients, filtered and amplified using a selected channel, and output.

In the ninth aspect of the present invention, the first to third wide-area transceivers have identical sampling clocks for simultaneously processing a plurality of signals having different frequencies.

The present invention can selectively determine the frequency of a received signal in a received signal of each of a plurality of wide-area receiving devices in which a plurality of identical frequencies are mixed, so that no phase difference is generated at the time of synthesizing the same frequency signal, It is possible to provide a high-quality communication service in a road or a railroad section where a plurality of signals are mixed together.

In addition, the present invention can use only a single optical fiber over a wide area by branching to the east and the west after converting the selected frequency signal into digital and synthesizing the selected frequency signal to a frequency selected at the time of occurrence of trouble, Can be reassigned to an adjacent wide-area receiving apparatus and bypassed.

1 is a block diagram for explaining an outline of a radio relay apparatus for a tunnel according to the present invention,
FIG. 2 is a block diagram showing a first wide-area transceiver in a radio relay for a tunnel according to the present invention;
3 is a block diagram illustrating a second wide area transceiver in a radio relay for tunnels according to the present invention,
4 is a block diagram illustrating a third wide area transceiver in the radio relay for tunnels according to the present invention,
5 is a block diagram illustrating a channel selection unit in a radio relay apparatus for tunnels according to the present invention;
6 is a graph showing the frequency allocation of the signal converting means in the radio relay apparatus for tunnels according to the present invention,
7A and 7B are block diagrams showing the operation of the signal converting means in the radio relay apparatus for tunnels according to the present invention,
8 is a block diagram illustrating a multiplexing process of the radio relay apparatus for a tunnel according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a radio relay apparatus for a tunnel according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram for explaining a radio relay apparatus for a tunnel according to the present invention.

Referring to FIG. 1, a radio relay apparatus for a tunnel according to the present invention includes a reception antenna 40 installed in a region other than a road or a tunnel where radio signals can be transmitted easily, a transmission antenna 40 installed in a tunnel section of a road or a railway, An optical cable extending in a tunnel section of a road or a railway (hereinafter, referred to as a tunnel section) and transmitting a signal transmitted and received by the receiving antenna 40 and the transmitting antenna 50; A third wide area transceiver unit 33 for sensing the waveform of the at least one wide area transceiver unit 30 and a second wide area transceiver unit 30 for sensing the waveform of the at least one wide area transceiver unit 30, And a remote control unit 10 for checking whether there is an abnormality through the waveform of the at least one wide area transmission / reception unit 30 sensed by the third wide area transmission / reception unit 33 and remotely controlling the same.

The optical cable extends in one direction in the tunnel section and transmits respective signals applied from the reception antenna 40, the transmission antenna 50, and one or more wide-area transmission / reception units.

The reception antenna 40 is installed in an area where at least one of the reception antennas 40 can easily transmit radio signals in an area other than the tunnel section. Preferably, the receiving antenna 40 is at least one donor antenna capable of receiving an airwave signal and transmitting / receiving a mobile communication signal. Therefore, the transmission antenna 50 applies the received air wave signal or mobile communication signal to any one of the one or more wide area transmission / reception units.

The transmission antenna 50 is connected to one of the at least one wide area transceiver 30 within a tunnel section and is preferably connected to at least one remote antenna capable of transmitting and / Antenna). The transmission antenna 50 transmits a radio signal in a tunnel when a transmission signal is applied from one of the wide area transceivers 30 connected thereto.

The third wide-area transmission / reception unit 33 detects a waveform of an output signal of the at least one wide-area transmission / reception unit 30 applied through the optical cable and applies a detection signal to the remote controller 10.

The remote control unit 10 receives the detection signal of the third wide area transmission / reception unit 33, and when the power failure or failure occurs in any one of the one or more wide area transmission / reception units 30, And the wide-area transmission / reception unit. Also, the remote control unit 10 allocates different frequencies to the first wide area transmission / reception unit 31 to the third wide area transmission / reception unit 33, respectively. The remote control unit 10 transmits a frequency allocated to any one of the first to third wide-area transceivers 31 to 33 detected to the third wide-area transceiver 33 to the adjacent wide- So that it is possible to prevent an abnormality of the communication service due to the failure of one of the one or more wide area transceiving units.

The at least one wide-area transceiver 30 includes a first wide-area transceiver 31 for amplifying and converting a signal received at the receiving antenna 40 and outputting the signal in both directions of the optical cable, A second wide-range transceiver 32 for converting and amplifying the received signal and outputting the amplified signal to the transmit antenna 50; And a transmission / reception unit 33.

The first wide area transceiver unit 31 outputs a signal received from the reception antenna 40 to the optical cable and the second wide area transceiver unit 32 is applied to the first wide area transceiver unit 31 Amplifies and converts a signal transmitted through the optical cable, and applies the amplified signal to the transmission antenna 50 installed in the tunnel section. The third wide-area transmission / reception unit 33 converts and amplifies the radio signal received by the reception antenna 40 and transmits the amplified radio signal to the optical cable and / or the transmission antenna 50. The detailed configuration thereof will be described later with reference to Figs. 2 to 4 below.

2 is a block diagram illustrating a first wide area transceiver in a radio relay for tunnels according to the present invention.

Referring to FIG. 2, the first wide area transceiver 31 transmits a frequency of a bi-directional over-the-air broadcasting signal and / or a mobile communication signal received from the receiving antenna 40 to one transceiver antenna 40 A first amplifying unit 311 for sharing the frequency to transmit the downlink signal, a first amplifying unit 311 for low-noise amplifying the downlink signal received from the receiving antenna 40 and amplifying the power of the transmitted mobile communication signal at a high output A first frequency conversion means 314 for converting the frequency of a signal received by the reception antenna 40 into a carrier wave; First signal converting means 315 for mixing and transmitting signals of different bands, which have been converted by the first frequency converting means 314, or for separating and mixing the mixed signals in both directions and outputting them, And a first switching means (316) for switching the input / output signals of the wide-area transmission / reception unit by switching during a power failure.

The first duplexer 311 shares a frequency of a mobile communication signal transmitted and received with the airwave signal received from the receiving antenna 40. That is, the first multiplexer 311 combines the signals of the respective frequency bands in a lossless manner in order to share the signal received from the receiving antenna 40 in one direction of the optical cable and the other direction (for example, in the east direction and the west direction) give.

The first amplifying means 313a and 312b low-noise amplifies the signal received from the receiving antenna, amplifies the signal applied to the first channel selecting means 312, and applies the amplified signal to the receiving antenna.

The first channel selection unit 313 selects and determines only a high-quality frequency channel, and the detailed configuration thereof will be described with reference to FIG.

5 is a block diagram showing channel selection means in a radio relay apparatus for a tunnel according to the present invention.

5, the first channel selecting means 313 includes an oscillator for oscillating a signal amplified by the first amplifying means 312, a signal amplifying means for amplifying a signal amplified by the first amplifying means 312, A first amplifier 313b for amplifying an output of the first mixer 313a and a second amplifier 313b for converting an analog output signal of the first amplifier 313b into a digital signal A digital filter 313d for filtering the output signal of the AD converter 313c as a determined channel and a DA converter 313e for converting the digital signal output from the digital filter 313d into an analog signal, A second amplifier 313f for amplifying an output signal of the DA converter 313e and a second amplifier 313f for mixing the signal output from the second amplifier 313f with the oscillation signal of the oscillator, And a second mixer 313g for outputting to the second mixer 313g.

The first mixer 313a generates a frequency of a signal output from the first amplifying unit 312 as a signal oscillated by the oscillator. At this time, the oscillator applies a frequency oscillation signal included in a frequency band matching the channel selected by the digital filter 313d.

The AD converter 313c converts the analog signal generated by the first mixer 313a into a digital signal and applies the digital signal to the digital filter 313d.

The digital filter 313d passes only the signal of the set channel among the signals applied from the A / D converter 313c, filters the remaining signals, and applies the filtered signal to the DA converter 313e. That is, according to the present invention, a plurality of reception antennas 40 and transmission antennas 50 are installed in a tunnel section included in several broadcasting and communication areas in a road or a railroad, Thereby securing a good reception condition.

Since such high-quality reception conditions are canceled or canceled out due to phase angle in a process of combining a plurality of same frequencies, phase-to-channel phase difference may occur during transmission to the transmission antenna 50 through the optical cable, The first channel selecting means 313 selectively determines and amplifies the frequency of the reception signal allocated thereto and can cancel the phase difference through the multiplexing process in the first signal converting means 315.

The digital filter 313d generates an individual filter coefficient (FIR Filter) of a required channel, synthesizes the filtered filter coefficient to match the reference value, and applies the filter coefficient to the individual filter coefficient, It is preferable to measure it.

Therefore, the DA converter 313e converts the signal of the channel selected by the digital filter 313d into an analog signal, and outputs it to the second amplifier 313f.

The second amplifier 313f outputs the analog signal output from the DA converter 313e to the second mixer 313g and the second mixer 313g outputs the analog signal to the first frequency converting means 314 .

The first channel selection unit 313 determines a selected channel according to the frequency allocated through the remote control unit 10.

The first frequency conversion means 314 converts a carrier applied to the first signal conversion means 315 to an intermediate frequency. That is, the first frequency converting means 314 converts the carrier wave amplified by the first channel selecting means 313 to an intermediate frequency (IF) so as to be suitable for multiplexing of the first signal converting means 315, And applies it to the first signal conversion means 315.

The first signal converting means 315 mixes signals of different bands to simultaneously process signals of various bands such as AM, FM, DMB and TRS received at the receiving antenna 40 And separates the mixed signal before digital-to-analog conversion, and outputs the mixed signal in both directions of the optical cable. The first signal converting means 315 will be described in detail with reference to FIG. 6 and FIGS. 7A and 7B to illustrate the example.

FIG. 6 is a graph for explaining the operation of the signal converting means in the radio relay apparatus for tunnels according to the present invention, FIGS. 7 a and 7 b are block diagrams showing the operation of the signal converting means in the radio relay apparatus for tunnels according to the present invention to be.

The first signal converting means 315 uses the same sampling clock so that a plurality of signals (for example, AM, FM, DMB, TRS) received at the receiving antenna 40 can be processed simultaneously. If different sampling clocks are used, it is preferable to use the same sampling clock because noise increases due to intermodulation.

The first signal converting means 315 mixes the AM signal and the DMB signal among a plurality of signals (for example, AM, FM, DMB, and TRS). Here, the mixing process is as shown in FIG. 7B. In the first signal conversion unit, the AM signal and the DMB signal are combined with each other through a low-pass filter (LPF) and a high-pass filter (HPF) through an analog digital converter (ADC) .

As shown in FIG. 7A, the first signal converting means 315 removes noise from the synthesized signal through a low-pass filter (LPF) and a high-pass filter (HPF), and then outputs an analog digital converter And is output to the east side and the west side (+, -) of the optical cable.

The first signal transforming unit 315 transforms the forward and backward signals in the optical cable installed in the tunnel to prevent the phase difference from being generated by combining and branching signals of different bands in the tunnel section, A multiplexing process for canceling the phase difference between the reception signal of the reception antenna 40 and the transmission signal of the transmission antenna 50 is performed.

That is, since at least one receiving antenna 40 and a transmitting antenna 50 are connected to an optical cable extending in a tunnel section, even if they are the same signal, different phases depending on the direction and time of a signal output to the optical cable Can be mixed. Therefore, the first signal transforming unit 315 performs the following multiplexing process to cancel the phase difference as described above. This is as shown in FIG.

8 is a block diagram illustrating a multiplexing process of the radio relay apparatus for a tunnel according to the present invention.

Referring to FIG. 8, the first signal converting unit 315 converts a signal converted by the analogue digital converter (ADC) into a bidirectional signal output to a digital-to-analog converter (DAC) A signal is transmitted to the transmission antenna 50, and transmission of a signal in the opposite direction is canceled and attenuated by the mixing and branching process with the bidirectional signals transmitted through the optical cable.

The first signal converting means 315 converts the digital signal ADC received from the receiving antenna 40 into a forward received signal FD applied in the optical cable and a reverse received signal FD applied in the reverse direction in the optical cable. (? 1) the received signal RD to convert it into an analog signal (DAC) and output it.

The first signal converting means 315 synthesizes the signal DI received from the receiving antenna 40 and the forward received signal FD of the optical cable to output the signal DI to the optical cable in the forward direction.

The first signal converting means 315 mixes the received signal DI received from the receiving antenna 40 and the received signal RD in the opposite direction and outputs the mixed signal to the optical cable in the reverse direction.

The first signal conversion means 315 combines the transmission signal UI transmitted in the tunnel section with the transmission signal RU in the reverse direction applied in the optical cable and the forward transmission signal FU in the optical cable, (541).

The first signal conversion means 315 combines the transmission signal with the forward transmission signal applied in the forward direction in the optical cable (? 5), and outputs a forward signal to the optical cable.

Further, the first signal converting means 315 combines the transmission signal with the reverse transmission signal applied through the optical cable (Σ6) and outputs it to the optical cable in the reverse direction.

The signal output from the first wide-area transceiver 31 to the optical cable is transmitted to the second wide-area transceiver 32 and the third wide-area transceiver 33, which are output in both directions of the optical cable and connected to the optical cable. And is transmitted within the tunnel section through the connected transmission antenna 50. Or vice versa, to transmit signals in the opposite direction.

3 is a block diagram illustrating a second wide area transceiver in a radio relay for tunnels according to the present invention.

Referring to FIG. 3, the second wide-area transceiver 32 includes a second switching unit 321 for switching to connect or disconnect the optical cable, and a second wide- A second frequency conversion means (323) for converting the intermediate frequency converted by the second signal conversion means (322) into a carrier wave; and a second frequency conversion means A second amplifying unit 324 for amplifying the signal output from the first amplifying unit 323 and a second amplifying unit 324 for amplifying the radio signal amplified by the second amplifying unit 324 to the transmitting direction of the transmitting antenna 50 325).

The second signal converting means 322 removes unnecessary noise through a combining process and a branching process, and applies the signal to the second frequency converting means 323.

The second frequency conversion means 323 converts the intermediate frequency output from the second signal conversion means 322 into a carrier wave and applies the carrier wave to the second amplification means 324.

The second amplifying unit 324 amplifies a signal (Downlink) received from the transmitting antenna 50 and amplifies a signal (Uplink) applied from the second frequency converting unit 323, (325).

The second duplexer 325 is converted to coincide with the transmission direction of the transmission antenna 50 and is applied to the transmission antenna 50.

That is, the second wide area transmission / reception unit 32 can transmit to the first wide area transmission / reception unit 31 a signal of a frequency band determined to be a channel suitable for the broadcasting area in the tunnel through the transmission antenna 50.

The third wide area transmission / reception unit 33 includes a structure in which the first wide area transmission / reception unit 31 and the second wide area transmission / reception unit 32 are integrally formed, which will be described in detail with reference to FIG.

4 is a block diagram illustrating a third wide area transceiver in a radio relay for tunnels according to the present invention.

4, the third wide area transceiver 33 includes a receiving antenna 40 and a receiving antenna 40, that is, the third wide area transceiver 33 is connected to the receiving antenna 40 A third amplifying unit 332 for amplifying the signal output from the third multiplexer 331 and a third amplifying unit 332 for amplifying the signal amplified by the third amplifying unit 332 to a set channel A third frequency conversion means (334) for converting the carrier of the signal of the selected channel output from the second channel selection means (333) to an intermediate frequency and outputting the intermediate frequency, and a third frequency conversion means A third signal conversion means 335 for synthesizing and branching the signal output from the third frequency conversion means 334 to remove unnecessary noise and branching and outputting the signals in both directions, and a third signal conversion means 335 for connecting the third signal conversion means 335 and the optical cable (336) outputting the intermediate frequency signal from the third signal converting means (335) A fourth amplifying means for amplifying the signal converted by the fourth frequency converting means 337 and a fourth amplifying means for amplifying the signal converted by the fourth amplifying means and the transmitting antenna 50 And a fourth cooperator 339 for matching directions.

Here, the receiving antenna 40 and the transmitting antenna 50, which are connected to the first to third wide-area transceivers 31 to 33, are different from each other and are given the same reference numerals and the same names for convenience of description.

Each of the configurations included in the third wide-area transmission / reception unit 33 performs the same function as that included in the first wide-area transmission / reception unit 31 and the second wide-area transmission / reception unit 32, do.

The present invention can transmit and receive bi-directional signals to and from a broadcast area in a tunnel section by installing an optical cable in a tunnel and installing a transmission antenna 50 and a reception antenna 40, respectively. In addition, the first or third wide-area transceiver 33 mixes and branches the signal received from the receiving antenna 40 in a tunnel section or outside a tunnel section as a set channel to remove unnecessary noise, It is possible to provide high quality airwaves and mobile communication services in the tunnel by installing one optical cable in the tunnel section.

10: remote control unit 20: waveform monitoring unit
30: wide area transmission / reception unit 31: first wide area transmission /
32: second wide-range transmission / reception unit 33: third wide-
40: Receive antenna 50: Transmit antenna

Claims (11)

At least one receiving antenna for receiving and receiving a mobile communication signal, which is installed in an area within a road or a railway section where transmission of a radio signal is easy;
At least one transmitting antenna for transmitting and receiving a mobile communication signal of an airwave installed in a tunnel in which a road or a railroad is installed;
An optical cable extending in the tunnel and transmitting / receiving signals input / output from the reception antenna and the transmission antenna in both directions;
Each of which has a different frequency assigned thereto, determines a channel of a signal input / output from the transmission antenna and the reception antenna, converts different frequency signals into frequencies of the same band, synthesizes and branches the signals, and outputs the combined signals to the optical cable in both directions. ;
A third wide-area transceiver for sensing a waveform output from the at least one wide-area transceiver; And
And a remote controller for receiving an output detection signal of the one or more wide area transceiver units sensed by the third wide area transceiver unit and judging the abnormality due to a power failure or a failure,
The remote control unit allocates different frequencies to the at least one wide area transceiver unit and receives the sensing signal of the third wide area transceiver unit and reassigns the frequency allocated to the wide area transceiver unit where the abnormality occurs to the adjacent wide area transceiver unit And the radio relay device for tunnels. delete delete At least one receiving antenna for receiving and receiving a mobile communication signal, which is installed in an area within a road or a railway section where transmission of a radio signal is easy;
At least one transmitting antenna for transmitting and receiving a mobile communication signal of an airwave installed in a tunnel in which a road or a railroad is installed;
An optical cable extending in the tunnel and transmitting / receiving signals input / output from the reception antenna and the transmission antenna in both directions;
Each of which has a different frequency assigned thereto, determines a channel of a signal input / output from the transmission antenna and the reception antenna, converts different frequency signals to a frequency of the same band, synthesizes and diverts them, and outputs the combined signals to the optical cable in both directions. ≪ / RTI &
The receiving antenna is a donor antenna capable of receiving an airwave signal and transmitting / receiving a mobile communication signal, wherein at least one of the at least one receiving antenna is installed in an area where radio signals can be easily transmitted in a region other than the tunnel, Receiving unit and the wide-area transmitting / receiving unit. At least one receiving antenna for receiving and receiving a mobile communication signal, which is installed in an area within a road or a railway section where transmission of a radio signal is easy;
At least one transmitting antenna for transmitting and receiving a mobile communication signal of an airwave installed in a tunnel in which a road or a railroad is installed;
An optical cable extending in the tunnel and transmitting / receiving signals input / output from the reception antenna and the transmission antenna in both directions;
Each of which has a different frequency assigned thereto, determines a channel of a signal input / output from the transmission antenna and the reception antenna, converts different frequency signals to a frequency of the same band, synthesizes and diverts them, and outputs the combined signals to the optical cable in both directions. ≪ / RTI &
Wherein the transmission antenna is one or more remote antennas capable of transmitting and receiving a public-air signal and a mobile communication signal, the remote antenna being installed in a tunnel by being connected to any one of the one or more wide-area transceivers in a tunnel section. Wireless repeater. At least one receiving antenna for receiving and receiving a mobile communication signal, which is installed in an area within a road or a railway section where transmission of a radio signal is easy;
At least one transmitting antenna for transmitting and receiving a mobile communication signal of an airwave installed in a tunnel in which a road or a railroad is installed;
An optical cable extending in the tunnel and transmitting / receiving signals input / output from the reception antenna and the transmission antenna in both directions;
Each of which has a different frequency assigned thereto, determines a channel of a signal input / output from the transmission antenna and the reception antenna, converts different frequency signals to a frequency of the same band, synthesizes and diverts them, and outputs the combined signals to the optical cable in both directions. ≪ / RTI &
Wherein the at least one wide-
A first wide-band transceiver for converting a signal received from the receiving antenna into a frequency allocated to the remote controller, and outputting the converted signal in both directions of the optical cable;
Converts a signal applied through the optical cable to a frequency allocated by the remote controller, amplifies and outputs the signal to the transmission antenna, or converts a signal inputted from the transmission antenna into a frequency allocated in the remote controller, amplifies the signal, A second wide-range transmission / reception unit for outputting the second wide- And
And a third wide-area transceiver unit for converting a signal output from the receiving antenna or the other wide-area transmitter into a frequency allocated to the remote controller, and outputting the amplified signal to the transmitting antenna and the optical cable, respectively. 7. The apparatus of claim 6, wherein the first wide area transceiver
A first duplexer for sharing a frequency to transmit a reception signal to the optical cable;
First amplifying means for amplifying the received signal by low noise and amplifying the transmitted signal by high output;
First channel selecting means for selecting, amplifying and outputting a channel of a received signal according to a frequency allocated by the remote control unit;
First frequency conversion means for converting an intermediate frequency applied from the first channel selection means into a carrier wave;
First signal converting means for removing noise after mixing signals of different bands among the signals output from the first frequency converting means, dividing the mixed signal into original signals, and branching the mixed signals to the optical cable in both directions; And
And a first switching means for electrically connecting or disconnecting the optical cable and the output side of the first signal converting means under the control of the remote control section. 7. The apparatus of claim 6, wherein the second wide-
A second switch for connecting or disconnecting the line so that input and output of the optical cable and the signal can be performed;
Second signal conversion means for converting a received signal inputted from the optical cable connected through the second transfer means into a signal having a frequency band allocated by the remote control section, amplifying the signal, and outputting the amplified signal;
Second frequency conversion means for converting the intermediate frequency signal output from the second signal conversion means into a carrier signal;
Second amplifying means for amplifying a signal output from said second frequency converting means;
And a duplexer for matching the signal amplified by said second amplifying means with the transmission direction of said transmission antenna and outputting the signal to said transmission antenna. 7. The apparatus of claim 6, wherein the third wide area transceiver
A third duplexer for sharing a signal received by the reception antenna so as to have a direction coinciding with the optical cable;
Third amplifying means for amplifying a received signal output from said third multiplexer;
Second channel selecting means for converting the channel of the signal amplified by the third amplifying means into the selected channel according to the assigned frequency;
A third frequency conversion means for converting the signal of the selected channel output from the second channel selection means to an intermediate frequency and outputting the signal;
Third signal converting means for mixing the different signals outputted from the third frequency converting means into signals of the same frequency band to remove noise and for branching the mixed signal in both directions and outputting the mixed signals;
Third switching means for connecting or disconnecting the line so that input / output of the signal of the optical cable with the third signal conversion means can be performed under the control of the remote control unit;
Fourth frequency conversion means for converting the intermediate frequency signal output from the third signal conversion means into a carrier wave;
Fourth amplifying means for amplifying the signal converted by said fourth frequency converting means; And
And a fourth multiplexer for outputting the signal outputted from the fourth amplifying means in accordance with the direction of the transmission antenna. The apparatus as claimed in claim 7 or 9, wherein the first and second channel selecting means
The remote control unit generates an individual filter coefficient (FIR Filter) of a required channel for the frequency allocated thereto, combines the set reference value and the input signal into a final filter coefficient, applies the filter coefficient to the selected filter coefficient, And outputs the signal to the radio relay station. 7. The apparatus of claim 6, wherein the first to third wide area transceivers
And the same sampling clock is used for simultaneously processing a plurality of signals having different frequencies.

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