KR20180060422A - Radio relay apparatus for tunnels and control method thereof - Google Patents

Abstract

The present invention relates to a controlling method of a wireless relay device for a tunnel. More specifically, the present invention relates to a controlling method of a wireless relay device for a tunnel which ensures a high quality receiving condition by mixing signals of various broadcastings and communication areas of a tunnel, an underground section and a mountainous terrain in road and railroad sections and smoothly provides a mobile communication service within the entire underground shaded section. The controlling method of a wireless relay device for a tunnel comprises at least one wide area transmission/reception part in which at least one receiving antenna installed in an area within the road or railroad sections in which a wireless signal can be easily transmitted converts and amplifies a signal input/output to/from a transmission antenna installed in the tunnel and outputs the signal to an optical cable extending in the tunnel in both directions.

Description

TECHNICAL FIELD [0001] The present invention relates to a radio relay apparatus for a tunnel,

The present invention relates to a control method of a radio relay device for a tunnel, and more particularly, to a control method of a radio relay device for a tunnel by mixing signals of various broadcasting and communication areas in a tunnel, underground section and mountainous terrain in a road or a railroad section, And more particularly, to a control method of a radio relay apparatus for a tunnel in which a mobile communication service can be smoothly provided in an entire underground 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 higher, the broadcasting and communication areas are mixed in the moving section. For example, underground large-scale underground roads have different broadcasting and communication areas for tunnel start and end points and intermediate entrance and exit lamps, and metropolitan subway stations have different reception and communication areas due to different history. Occurs.

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.

Korean Patent No. 10-1367085 (Announcement of Feb. 24, 2014)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method and a system for providing high quality reception conditions by mixing signals of various broadcasting and communication areas in tunnels, underground sections and mountainous terrain in roads and railroad sections, The present invention also provides a control method of a radio relay apparatus for a tunnel.

According to one aspect of the present invention, there is provided a control method of a radio relay apparatus for a tunnel, comprising: converting a signal input / output from a transmission antenna provided in a tunnel into one or more reception antennas installed in an area within a road or a railway section, And one or more wide-range transceivers for amplifying and outputting the amplified signals to the optical cable extending in the tunnel in both directions.

According to the present invention, it is possible to selectively determine the frequency of a received signal in a received signal of each of the wide-area receiving devices in which a plurality of the same 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 in which a plurality of signals are mixed.

In addition, according to the present invention, a selected frequency signal is converted into digital signals and then synthesized and branched into east and west to use only a single optical fiber across the whole area. When a wide area receiving device at a specific place is selected There is an effect that the frequency can be reassigned to an adjacent wide area receiving apparatus and bypassed.

1 is a block diagram showing 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 a tunnel according to the present invention.
FIG. 6 is a frequency allocation diagram of the signal converting unit in the radio relay apparatus for tunnels according to the present invention,
7A and 7B are block diagrams showing the operation of the signal conversion unit in the radio relay apparatus for tunnels according to the present invention,
FIG. 8 is a block diagram illustrating a multiplexing process of a radio relay apparatus for a tunnel according to the present invention;
9 is a block diagram showing a control method of a radio relay apparatus for tunnels according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Also, in order to clearly illustrate the present invention in the drawings, portions not related to the present invention are omitted, and the same or similar reference numerals denote the same or similar components.

The objects and effects of the present invention can be understood or clarified naturally by the following description, and the objects and effects of the present invention are not limited only by the following description.

The objects, features and advantages of the present invention will become more apparent from the following detailed description. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Now, a radio relay apparatus for a tunnel and a control method of the apparatus according to the present invention will be described.

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 transceiver 30 sensed by the third wide area transceiver 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 one or more donor antennas 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 one or more wide area transceivers 30 within a tunnel section and is preferably connected to one or more remote antennas 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. In addition, the remote controller 10 allocates different frequencies to the first wide area transmitter / receiver 31 to the third wide area transmitter / receiver 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 third wide-angle transceiver 32 for converting and amplifying the signal received by the receive antenna 40, And a wide-range transceiver 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 from the reception device 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 channel selection means 313 for selectively determining the frequency of the allocated reception signal and a first frequency conversion means 314 for converting the frequency of the signal received by the reception antenna 40 into a carrier wave, A first signal converting means 315 for mixing and transmitting signals of different frequencies and the frequency converted by the first frequency converting means 314 or for separating and mixing the mixed signals in both directions and outputting them, And the transfer to the power failure comprises a first switching means (316) for bypassing the wide-area transmission and reception parts of input and output signals.

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 the 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 313b for converting the digital signal output from the digital filter 313d into an analog signal, A second amplifier 313f for amplifying the output signal of the DA converter 313e and a second frequency converter 315f for mixing the signal output from the second amplifier 313f with the oscillation signal of the oscillator, And a 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 selected channel in 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 AD converter 313c, and applies the filtered signal to the DA converter 313e. That is, in 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 ensuring high quality reception conditions.

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, and FIGS. 7A and 7B are block diagrams showing the operation of signal converting means in the radio relay apparatus for tunnels according to the present invention .

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 converting 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 forward and backward signals in the optical cable installed in the tunnel so as to prevent a phase difference from being generated through synthesis and branching of signals of different bands in the tunnel section, The 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 proceeds.

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 means 315 converts the signal converted by the analogue digital converter (ADC) into a bidirectional signal output to the digital analog converter (DAC) And transmitting the signal in the opposite direction can cancel and attenuate the phase difference of the same band signals through 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 converting means 315 combines the transmission signal UI transmitted in the tunnel section with the reverse transmission signal RU applied in the optical cable and the forward transmission signal FU to convert the synthesized signal into an analog signal DAC) 541 and outputs it.

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-range 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 signal in both directions, A third switching means 336 for connecting or disconnecting the intermediate frequency signal outputted 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 combiner 339 for matching the directions of the first and second combiners 331 and 332. [0076] 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 a bidirectional signal to and from a broadcast area in a tunnel section by installing an optical cable in the tunnel and installing a transmission antenna 50 and a reception antenna 40, 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 the 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.

The present invention includes the above-described configuration. In the following, the operation of the present invention achieved through the above-described configuration will be described with reference to the attached flowchart.

9 is a flowchart showing a control method of a radio relay apparatus for tunnels according to the present invention.

9, a method of controlling a radio relay apparatus for a tunnel according to the present invention includes mixing and amplifying a plurality of signals received from a receiving antenna into a signal having a frequency of a selected channel, and outputting a bidirectional signal to the optical cable (S20) for converting and amplifying the signal received in the output step (S10) of the received signal into a channel set as a transmission channel and outputting the signal, and a step (S30) for detecting a waveform of the output signal to determine whether or not an abnormality has occurred, a line switching circuit for switching the line when an abnormality is detected in the output waveform of the received signal detected in the abnormality determination step (S30) And a frequency reallocation step (S50) of allocating an allocated frequency band in which an abnormality occurs to the receiving apparatus after the line switching step (S40).

The step of outputting the received signal S10 converts a received signal of an airwave or a mobile communication signal received from the receiving antenna 40 into an assigned frequency and combines and splits two different signals into an optical cable extending in the tunnel And outputs it in both directions. Here, the first wide-area transceiver 31 synthesizes two different signals received by the receiving antenna 40 as a frequency allocated by the remote controller 10, removes and amplifies the noise, And outputs it to the optical cable in both directions.

The transmitting step S20 is a step in which the receiving signal outputted bidirectionally from the first wide-area transceiver 31 to the optical cable in the receiving step of the receiving signal is transmitted to the second wide-area transceiver 32 or the third wide- (33) to a signal having a frequency band that is suitable in the tunnel section, and transmits the signal.

The abnormality detection step S30 detects the waveform of a signal output from the first to third wide-area transceivers 31 to 33 by the waveform monitoring unit 20 and detects an abnormality of each wide- .

The line transfer step S40 may include switching the first to third wide-area transmission / reception units 31 to 33 connected to the one or more wide-area transmission / reception units 31 to 33 so as to switch the line connected to the wide- And switching the switching means to block the signal from the optical cable. The remote control unit 10 receives the abnormality detection signal detected by the waveform monitoring unit 20 and turns off the switching means 316 and 321 of the corresponding wide area transmission and reception units 31 to 33 to disconnect the line with the optical cable do.

The frequency reallocation step S50 is a step in which the remote controller 10 allocates the frequencies allocated to the wide area transmission and reception units 31 to 33 to the adjacent wide area transmission and reception units in the abnormal state determination step S30 Thereby preventing the interference of the corresponding frequency band.

In addition, the step of outputting the reception signal S10 includes the steps of: (S11) sharing a frequency to transmit the reception signal received by the reception antenna 40 so as to coincide with the direction of the optical cable; An amplifying step (S12) of amplifying the output signal by low noise amplifying the output signal and amplifying the output signal by a high output power; and amplifying the received signal amplified in the amplifying step by selecting and amplifying the channel of the received signal according to the allocated frequency A frequency conversion step (S14) of converting an intermediate frequency of a signal output from the channel selection step into a carrier wave; a frequency conversion step (S14) of converting signals output from the frequency conversion step (S14) And a signal converting step (S15) of dividing the mixed signal into an original signal and branching the mixed signal in both directions to the optical cable.

The signal conversion step S15 mixes the reception signal ADC of the reception antenna with the reception signal FD in the forward direction of the optical cable and the reception signal RD in the reverse direction of the optical cable, (DAC).

The transmitting step S20 includes a second signal converting step S21 for converting the signal output from the outputting step S10 of the received signal into a signal having an allocated frequency band when the signal is inputted through the optical cable, And the second signal conversion step - 10 -

A second frequency conversion step S22 for converting the intermediate frequency signal outputted in step S21 into a carrier signal, a second amplification step S23 for amplifying the signal outputted in the second frequency conversion step S22, And an output step S24 of outputting the signal amplified in the second amplification step S23 in conformity with the transmission direction of the transmission antenna 50. [

As described above, according to the present invention, when one or more wide area transceivers 30 generate a fault condition due to a power failure or a fault, it is possible to reassign a frequency to another adjacent wide area transceiver unit so that the communication service of the corresponding frequency band is not stopped .

It will be apparent to those skilled in the art that various modifications, additions and substitutions are possible, without departing from the spirit and scope of the invention as defined by the appended claims. Should be regarded as belonging to the above-mentioned patent claims.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventive concept as defined by the appended claims. But is not limited thereto.

In the above-described exemplary system, the methods are described on the basis of a flowchart as a series of steps or blocks, but the present invention is not limited to the order of the steps, and some steps may occur in different orders . It will also be understood by those skilled in the art that the steps shown in the flowchart are not exclusive and that other steps may be included or that one or more steps in the flowchart may be deleted without affecting the scope of the invention.

Claims (2)

One or more wide-area transmission / reception units for converting and amplifying signals input / output from a transmission antenna provided in a tunnel in at least one reception antenna provided in an area within a road or a railway section where transmission of a radio signal is easy and outputting the signals to an optical cable extending in the tunnel in both directions A method for controlling a radio relay apparatus for a tunnel,
The present invention relates to a method and apparatus for transmitting and receiving an airwave installed in an area within a road or a railroad section in which a radio signal is easily transmitted and a plurality of signals received from one or more reception antennas transmitting and receiving a mobile communication signal, At least one control frequency for controlling a transmission signal of a wide-area transceiver unit in a tunnel section based on a monitoring frequency for monitoring a reception signal of an antenna installed at both ends of the tunnel and an output size of the monitoring frequency, Outputting a reception signal for mixing and amplifying a signal having a frequency of a channel and outputting a bidirectional signal to the optical cable;
A transmitting step of converting received signals output in both directions into a pre-allocated frequency band, mixing and branching signals of different frequency bands, and transmitting the received signals in a bidirectional manner to one optical cable extending in a tunnel section in the receiving step of the received signal;
And an abnormality determination step of detecting an abnormality by detecting a waveform output from the outputting step and the outputting step of the wide area transceiver,
In the transmitting step,
A second signal conversion step of converting a signal related to the monitoring frequency outputted at the output stage of the received signal into a signal having an allocated frequency band when the signal is inputted through the optical cable and outputting the amplified signal, A second frequency conversion step of converting the intermediate frequency signal output from the second signal conversion step into a carrier signal; A second amplifying step of amplifying the signal output from the second frequency conversion step; And outputting the signal amplified in the second amplifying step to the transmission antenna in conformity with the transmission direction of the transmission antenna.
The method according to claim 1,
(DAC) for synthesizing a transmission signal (UI) transmitted in a tunnel section, a reverse transmission signal (RU) applied in the optical cable, and a forward transmission signal (FU) A method of controlling a relay apparatus.

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