KR20130091425A - Wireless repeater for tunnel - Google Patents

Abstract

PURPOSE: A wireless repeater for a tunnel is provided to enable to determine a frequency of a received signal allocated to a wideband receiver itself selectively when a plurality of same frequencies is mixed in a signal received in each wideband receiver in a tunnel section where a road or a railway is under construction. CONSTITUTION: An optical cable is extended within a tunnel. The optical cable delivers a signal inputted/outputted in a receiver antenna and a transmitter antenna bi-directionally. A first, a second and a third transceiver part (31,32,33) determines a channel of the signal inputted/outputted to/from the transmitter antenna and the receiver antenna. The first, the second and the third wideband transceiver part converts signals of different frequencies into the frequency in the same band. The first, the second and the third wideband transceiver part synthesize or divide the converted frequency. The first, the second and the third wideband transceiver part output the synthesized and divided frequency to the optical cable bi-directionally. [Reference numerals] (31) First transceiver part; (32,30) Second transceiver part; (33) Third transceiver part; (40,EE,HH) Receiver antenna; (50,NN,QQ,TT) Transmitter antenna; (AA) Equal axis; (BB,CC,DD,FF,GG,II,KK) Optic cable; (JJ) West; (LL,PP,VV) Broadband road/railroad; (MM,OO,RR,UU) Shadow area (service area); (SS) Remote antenna

Description

Wireless repeater for tunnels {Wireless repeater for tunnel}

The present invention relates to a wireless relay device for a tunnel, and more particularly, to mix a signal of various broadcasting and communication areas in a tunnel or an underground section and a mountainous terrain in a road or railway section to secure high quality reception conditions and then to the entire basement. The present invention relates to a wireless relay device for a tunnel, in which a service of mobile communication can be smoothly provided within a shadow period.

The construction of roads and railways has been used to avoid mountainous terrain. However, the construction of roads and railways has led to the increase in the length of tunnels and the increased number of tunnels.

In the vicinity of the tunnel of the road or railway section, listening to the airwave broadcast or providing two-way mobile communication service is a mountainous terrain, loss of radio waves will cause hearing loss.

In addition, ultra-large underground tunnels are on the rise, as is the case of the ultra-large large-depth underground roads for urban traffic improvement and the large-depth wide-area underground railways for improving traffic between metropolitan cities.

In addition, in recent years, as the moving speed increases due to the straightening of roads and railways, several broadcasting and communication areas are mixed in the moving sections. For example, the long-depth large-depth underground roads have different broadcasting and communication zones at the tunnel start, end, and middle entrance and exit ramps. .

In particular, the conventional air-broadcasting rebroadcasting devices or mobile communication repeaters for underground shaded sections provided one receiving air line to service broadcasting in a unit area, but as described above, various receptions were performed on roads and railroads that moved the wide area in a short time. If there is a demand, there is a limitation of providing a service, and thus there is a problem that reception and transmission of broadcast and mobile communication are not desired.

In addition, since only one place of a conventional wide area receiver is installed in a region, when a notice such as a failure or power failure warning occurs, communication in the region may be paralyzed, but there is no countermeasure in the related art.

Therefore, the present invention has been made to solve the above-mentioned conventional problems, an object of the present invention is that a plurality of the same frequency is mixed in the signals received at each wide area reception device in the tunnel section in which the road or railway line is constructed In this case, the present invention provides a tunnel radio relay apparatus capable of selectively determining a frequency of a received signal allocated to the self.

In addition, another object of the present invention is to allocate a frequency table of each wide area receiving device to enable bypass in case of occurrence of breakdown, power failure, etc. in a specific place, and to close the frequency of the wide area receiving device where the high frequency reception occurs. It is to provide a radio relay device for tunnel that can be reassigned to the tunnel. The present invention provides a tunnel wireless relay device.

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

A first embodiment of the present invention is one or more receiving antennas for receiving and receiving mobile wave signals and mobile communication signals installed in an area within a road or railway section that is easy to transmit radio signals; One or more transmission antennas for transmitting and receiving air transmission and mobile communication signals installed in a tunnel in which a road or a railway is installed; An optical cable extending in a tunnel and transmitting signals input and output from the reception antenna and the transmission antenna in both directions; One or more wideband receivers each having a different frequency assigned to determine a channel of a signal inputted to and outputted from the transmitting antenna and the receiving antenna, converting different frequency signals into frequencies of the same band, combining and branching them, and outputting them bidirectionally to the optical cable. ; A third wideband receiver for detecting a waveform output from the at least one wideband receiver; Receiving an output detection signal of the at least one wide area transmitter and receiver detected by the third wide area transmitter and receiver includes a remote control unit for determining whether there is an abnormality due to power failure or failure, wherein the remote control unit is each other And assigns another frequency, and receives the detection signal of the third wideband receiver and reassigns the frequency assigned to the wideband receiver having an error to another adjacent wideband receiver.

In the second embodiment of the present invention, the reception antenna is a donor antenna capable of receiving an air wave signal and transmitting / receiving a mobile communication signal, in which one or more areas easily transmit radio signals in areas other than a tunnel. It is characterized in that for applying the signal received and installed in one or more of the one or more wide area transmission and reception.

In the third embodiment of the present invention, the transmission antenna is one or more remote antennas (Remote Antenna) capable of transmitting air waves and transmitting and receiving mobile communication signals, and are connected to any one of the one or more wide area transmitters within a tunnel section. It is characterized in that it is installed in the tunnel.

In the fourth embodiment of the present invention, the at least one wideband transceiver comprises: a first wideband receiver for converting and amplifying a signal received at the receiving antenna into a frequency allocated by the remote controller to output in both directions of the optical cable; Converts and amplifies a signal applied through the optical cable to a frequency assigned by the remote control unit and outputs the signal to the transmission antenna, or converts and amplifies a signal input from the transmission antenna to a frequency allocated by the remote control unit to the optical cable. A second wideband receiver for outputting; And a third wideband transceiver for converting and amplifying a signal output from the reception antenna or another wideband transmitter to a frequency allocated by the remote controller and outputting the signal to the transmission antenna and the optical cable, respectively.

In a fifth embodiment of the present invention, the first wideband receiver includes: a first common container for sharing a frequency to transmit a received signal to the optical cable; First amplifying means for low noise amplifying the received signal and for power amplifying the transmitted signal with a high output; First channel selecting means for selecting, amplifying and outputting a channel of a received signal according to a frequency assigned by the remote control unit; First frequency converting means for converting an intermediate frequency applied from said channel selecting 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, separating the mixed signal into an original signal, and branching the mixed signal in both directions to output the optical cable; And first switching means for electrically connecting or disconnecting the optical cable and the output side of the signal conversion means by the control of the remote control unit.

In the sixth embodiment of the present invention, the second wide area transmission and reception unit comprises: second switching means for connecting or blocking a line to enable input and output of the optical cable and a signal; Second signal conversion means for converting, amplifying and outputting a received signal input from the optical cable connected through the second switching means into a signal having a frequency band allocated by the remote control unit; Second frequency conversion means for converting the signal of the intermediate frequency output from the second signal conversion means into a carrier signal; Second amplifying means for amplifying the signal output from the second frequency converting means; And a common unit for outputting the signal amplified by the second amplifying means to the transmission antenna in accordance with the transmission direction of the transmission antenna.

In a seventh embodiment of the present invention, the third wideband transmitter / receiver comprises: a third common container for sharing a signal received by the receiving antenna so that the signal has a direction corresponding to that of the optical cable; Third amplifying means for amplifying the received signal output from the common unit; Second channel selecting means for converting a channel of the signal amplified by the third amplifying means into a selected channel according to an assigned frequency; Third frequency converting means for converting the signal of the selected channel output from the second channel selecting means into an intermediate frequency and outputting the intermediate frequency; Third signal converting means for removing noise by mixing different signals output from the frequency converting means into a signal having the same frequency band and branching the mixed signal in both directions; Third switching means for connecting or blocking a line to enable input and output of signals of the signal conversion means and the optical cable by the control of the remote control unit; Fourth frequency converting means for converting the intermediate frequency signal output from the signal converting means into a carrier wave; Fourth amplifying means for amplifying the signal converted by the fourth frequency converting means; And a fourth common container outputting the signal output from the fourth amplifying means in accordance with the direction of the transmitting antenna.

In the eighth embodiment of the present invention, the first and second channel selection means generates an individual filter coefficient (FIR Filter) of a channel required for the frequency allocated by the remote control unit, and matches the set reference value with the input signal. After synthesizing with the final filter coefficients, it is characterized by outputting by filtering and amplifying the selected channel by applying the individual filter coefficients.

In the ninth embodiment of the present invention, the first to third wideband receivers have the same sampling clock to simultaneously process a plurality of signals having different frequencies.

The present invention can selectively determine the frequency of the received signal from the received signal of each of the wide-band receivers in which a plurality of the same frequency is mixed so that a phase difference does not occur when synthesizing the same frequency signal. Likewise, a high quality communication service is possible in a road or railway section where several signals are mixed.

In addition, the present invention converts the selected frequency signal into a digital signal, synthesizes it, and then branches to the east and west sides so that only one strand of optical cable can be used throughout the entire area. By allocating to adjacent area receivers, bypass is possible.

1 is a block diagram illustrating an outline of a wireless relay device for tunnels according to the present invention;
2 is a block diagram showing a first wide area transceiver in a wireless relay device for tunnel according to the present invention;
3 is a block diagram showing a second wide area transmitter and receiver in a wireless relay device for tunnel according to the present invention;
4 is a block diagram showing a third wide area transmitter and receiver in the wireless relay device for tunnel according to the present invention;
5 is a block diagram showing channel selection means in the radio relay apparatus for tunnel according to the present invention;
Figure 6 is a graph showing the frequency arrangement of the signal conversion means in the wireless relay device for a tunnel according to the present invention,
7a and 7b is a block diagram showing the operation of the signal conversion means in the wireless relay device for tunnel according to the present invention;
8 is a block diagram illustrating a multiplexing process of the wireless relay device for tunnel according to the present invention.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the wireless relay device for a tunnel according to the present invention will be described in detail.

1 is a block diagram illustrating a wireless relay device for a tunnel according to the present invention.

Referring to FIG. 1, a wireless relay apparatus for tunnels according to the present invention includes a reception antenna 40 installed in an area other than a road or a tunnel where radio signals can be easily transmitted, and a transmission antenna installed in a tunnel section of a road or a railway. 50, an optical cable extending in a tunnel section of the road or railway (hereinafter collectively referred to as a tunnel section) for transmitting signals transmitted and received by the receiving antenna 40 and the transmitting antenna 50, and the transmitting antenna ( 50) and one or more wideband receivers 30 for amplifying and converting signals transmitted and received by the reception antenna 40, and a third wideband receiver 33 for detecting waveforms of the one or more wideband receivers 30; It includes a remote control unit 10 for remote control by checking the presence or absence of the abnormality through the waveform of the at least one wide area receiver 30 detected by the third wide area receiver 33.

The optical cable extends in one direction in the tunnel section and transmits each signal applied from the reception antenna 40, the transmission antenna 50, and one or more wideband transmitters.

One or more receiving antennas 40 are installed in an area where radio signal transmission is easy in an area other than the tunnel section. Preferably, the reception antenna 40 is preferably at least one donor antenna capable of receiving an air wave signal and transmitting and receiving a mobile communication signal. Accordingly, the transmission antenna 50 applies the received airwave signal or mobile communication signal to any one of the one or more wide area transmitters.

The transmitting antenna 50 is connected to any one of the at least one wide area transmitting and receiving unit 30 in a tunnel section, preferably one or more remote antennas capable of transmitting air waves and / or transmitting and receiving mobile communication signals (Remote) Antenna). The transmission antenna 50 transmits a radio signal in a tunnel when a transmission signal is applied from any one of the connected wide area transmitters 30.

The third wideband receiver 33 detects a waveform of an output signal of the one or more wideband receivers 30 applied through the optical cable, and applies a detection signal of the abnormality to the remote controller 10.

The remote control unit 10 receives the detection signal of the third wide area transceiver 33, if any one or more of the one or more wide area transceiver 30, power failure or failure, optical cable to bypass the wide area transceiver And the line between the wide area transmitter and receiver. In addition, the remote control unit 10 assigns different frequencies to the first and third wideband receivers 31 and 33, respectively. The remote controller 10 retransmits the frequency allocated to any one of the first to third wideband receivers 31 to 33 detected by the third wideband receiver 33 to another adjacent wideband receiver. By allocating, it is possible to prevent an abnormality of a communication service due to a failure of any one of the one or more wide area transmitters.

The at least one wide area transceiver 30 amplifies and converts a signal received from the reception antenna 40 to output the bidirectional direction of the optical cable 31 and a signal applied through the optical cable. A second wide area transmitter / receiver 32 for converting and amplifying and outputting the signal to the transmission antenna 50, and a third wide area for converting and amplifying a signal received by the reception antenna 40 and applying it to the transmission antenna 50; It includes a transceiver 33.

Here, the first wideband receiver 31 outputs a signal received from the reception antenna 40 to the optical cable, and the second wideband receiver 32 is applied by the first wideband receiver 31. The signal transmitted through the optical cable is amplified and converted and applied to the transmission antenna 50 installed in the tunnel section. In addition, the third wideband transmitter / receiver 33 converts and amplifies a radio signal received by the reception antenna 40 and transmits it to the optical cable and / or to the transmission antenna 50. The detailed configuration thereof will be described later with reference to FIGS. 2 to 4.

2 is a block diagram showing a first wide area transmitter and receiver in a wireless relay device for tunnel according to the present invention.

Referring to FIG. 2, in the present invention, the first wideband transmitter / receiver 31 transmits a transmission / reception frequency of a bidirectional airwave broadcasting signal and / or a mobile communication signal received from the reception antenna 40 to one transmission / reception antenna 40. First amplification means for low noise amplification of the first common container (311) and the common frequency for transmission and the downlink signal received and applied by the receiving antenna 40, and amplifies the transmitted mobile communication signal to a high output ( 312, first channel selecting means 313 for selectively determining a frequency of an allocated received signal, and first frequency converting means 314 for converting a frequency of a signal received by the receiving antenna 40 into a carrier wave. And a first signal converting means 315 for mixing and transmitting a frequency converted from the first frequency converting means 314 and a signal of different bands, or splitting and outputting a mixed signal in both directions. And a first switching means 316 which is switched at the time of power failure and bypasses the input / output signals of the wide area transmission and reception section.

The first common container 311 makes the frequency of the mobile communication signal transmitted and received and the airwave signal received from the reception antenna 40 in common. That is, the first common container 311 combines the signals of each frequency band without loss in order to share the signals received from the receiving antenna 40 in one direction and the other side (for example, the east side and the west side) of the optical cable. give.

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

The first channel selecting means 313 selects and determines only a high quality frequency channel, the detailed configuration of which will be described with reference to FIG.

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

Referring to FIG. 5, the first channel selecting means 313 includes an oscillator for oscillating a signal amplified by the first amplifying means 312, a signal amplified by the first amplifying means 312 and the oscillator. A first mixer 313a to which the oscillation signals are mixed, a first amplifier 313b for amplifying the output of the first mixer 313a, and an analog output signal of the first amplifier 313b are converted into a digital signal. A digital filter 313d for filtering the AD converter 313c, the output signal of the AD converter 313c as the 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 the DA converter 313e output signal, and a signal output from the second amplifier 313f by mixing with the oscillation signal of the oscillator to generate the first frequency converting means 314. A second mixer 313g output to

The first mixer 313a generates a frequency of the signal output from the first amplifying means 312 as a signal oscillated by the oscillator. In this case, the oscillator applies a frequency oscillation signal included in a frequency band corresponding to the channel selected by the digital filter 313d.

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

The digital filter 313d passes only a signal of a channel set among the signals applied from the AD converter 313c, and filters the rest to the DA converter 313e. That is, according to the present invention, a plurality of receiving antennas 40 and transmitting antennas 50 are installed in a tunnel section included in a plurality of broadcasting and communication zones on a road or a railroad, and filtered as a set channel to mix several radio signals. It is to ensure a good reception condition.

Such a high quality reception condition is reduced or increased by destructive interference depending on the phase angle in the process of combining when a plurality of identical frequencies are mixed, so that a phase difference between channels may occur when transmitting to the transmission antenna 50 through an optical cable. The first channel selecting means 313 selectively amplifies and amplifies a frequency of a received signal allocated to the first channel selecting means 313 to cancel a phase difference through a multiplexing process in the first signal converting means 315.

In addition, the digital filter 313d generates an individual filter coefficient (FIR Filter) of a required channel, synthesizes the final filter coefficient in accordance with a reference value, and then applies it as an individual filter coefficient. It is preferable to measure.

Accordingly, the DA converter 313e converts the signal of the channel selected by the digital filter 313d into an analog signal and outputs the analog signal 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 is supplied to the first frequency converting means 314. Is authorized.

In this case, the first channel selection means 313 determines the selection channel according to the frequency allocated through the remote control unit 10.

The first frequency converting means 314 converts the carrier wave applied to the first signal converting means 315 into an intermediate frequency. That is, the first frequency converting means 314 converts the carrier wave amplified and output from the first channel selecting means 313 into an intermediate frequency IF so as to be suitable for multiplexing of the first signal converting means 315. To the first signal converting means 315.

The first signal converting means 315 mixes signals of different bands to simultaneously process signals of various bands such as signals (eg, AM, FM, DMB, TRS) received by the receiving antenna 40. And the mixed signals are separated and output in both directions of the optical cable before digital analog conversion. The first signal conversion means 315 will be described in detail with reference to FIGS. 6 and 7A and 7B to explain an example thereof.

Figure 6 is a graph for explaining the operation of the signal conversion means in the wireless relay device for tunnel according to the present invention, Figure 7a and 7b is a block diagram showing the operation of the signal conversion means in a wireless relay device for tunnel according to the present invention to be.

The first signal converting means 315 uses the same sampling clock to simultaneously process a plurality of signals (eg, AM, FM, DMB, TRS) received by the receiving antenna 40. If different sampling clocks are used, it is preferable to use the same sampling clock because noise increases due to cross-modulation.

The first signal converting means 315 mixes an AM signal and a DMB signal among a plurality of signals (for example, AM, FM, DMB, and TRS). The mixing process is as shown in Figure 7b. The AM signal and the DMB signal are synthesized by the first signal converter by removing noise outside the band set through the low pass filter LPF and the high pass filter HPF through an analog digital converter (ADC). .

In addition, the first signal converting means 315 removes noise through the synthesized signal through a low pass filter LPF and a high pass filter HPF, respectively, as shown in FIG. 7A, and then removes the analog digital converter ADC. Through conversion and branching into a digital signal, the optical cable is output to the east side and the west side (+,-).

The first signal conversion means 315 is a forward and reverse signal in the optical cable installed to extend in the tunnel in order to prevent the phase difference is generated through the synthesis and branching of signals of different bands in the tunnel section and the A multiplexing process is performed to cancel the phase difference between the reception signal of the reception antenna 40 and the transmission signal of the transmission antenna 50.

That is, in the present invention, since one or more receiving antennas 40 and transmitting antennas 50 are connected to the optical cables extending in the tunnel section, even if the same signals are used, phases different from each other depending on the direction and time of the signals output to the optical cables are different. Signals may be mixed. Therefore, the first signal conversion means 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 wireless relay device for tunnel according to the present invention.

Referring to FIG. 8, the first signal converting means 315 is a bidirectional signal output from a digital analog converter (DAC), that is, a signal converted through an analog digital converter (ADC), that is, received from the reception antenna 40. The signal is transmitted to the transmission antenna 50, and the transmission of the signal in the opposite direction may cancel and attenuate the phase difference of the same band signals through mixing and branching with the bidirectional signals transmitted through the optical cable.

First, the first signal converting means 315 is a digital signal ADC in which the signal received from the receiving antenna 40 is converted, and a forward receiving signal FD applied from the optical cable and a reverse direction applied in the reverse direction from the optical cable. The received signal RD is mixed (∑1), converted into an analog signal (DAC), and output.

In addition, the first signal conversion means 315 synthesizes the signal DI received from the reception antenna 40 and the forward reception signal FD of the optical cable ∑2 and outputs the forward direction to the optical cable.

The first signal converting means 315 mixes the received signal DI received from the receiving antenna 40 and the received signal RD in the reverse direction (Σ3) and outputs the reverse direction to the optical cable.

The first signal conversion unit 315 converts the transmission signal UI transmitted in the tunnel section, the transmission signal RU in the reverse direction and the forward transmission signal FU applied in the optical cable into an analog signal (DAC). 541 and output.

In addition, the first signal conversion means 315 combines the transmission signal and the forward transmission signal applied in the forward direction from the optical cable (Σ5) and outputs a forward signal to the optical cable.

In addition, the first signal conversion means 315 combines the transmission signal and the reverse transmission signal applied through the optical cable (Σ6) and outputs the reverse direction to the optical cable.

In this way, the signals output from the first wideband receiver 31 to the optical cable are output in both directions of the optical cable and connected to the second wideband receiver 32 and the third wideband receiver 33 respectively connected to the optical cable. It is transmitted in the tunnel section through the transmission antenna 50 to be connected. Alternatively, the signal in the opposite direction may be transmitted through the reverse process.

3 is a block diagram showing a second wide area transmitter and receiver in the wireless relay device for tunnel according to the present invention.

Referring to FIG. 3, the second wide area transmitter / receiver 32 is branched from the first wide area transmitter / receiver 31 through a second switching means 321 for switching to connect and block the optical cable and the optical cable. Second signal conversion means 322 for converting the output signal, second frequency conversion means 323 for converting the intermediate frequency converted by the second signal conversion means 322 into a carrier wave, and the second frequency conversion. A second amplifying means 324 for amplifying the signal output from the means 323, and a second common container for matching the outgoing direction of the transmitting antenna 50 with the wireless signal amplified by the second amplifying means 324 ( 325).

The second signal converting means 322 removes unnecessary noise through the synthesis and branching process of the signal applied through the optical cable and applies it to the second frequency converting means 323.

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

The second amplifying means 324 amplifies the signal (Downlink) received from the transmitting antenna 50, and conversely amplifies the signal (Uplink) applied from the second frequency converting means 323 to the second common container. To 325.

The second common container 325 is converted to match the transmission direction of the transmission antenna 50 and applied to the transmission antenna 50.

That is, the second wide area transmitter / receiver 32 may transmit a signal of a frequency band determined as a channel suitable for the broadcast zone in the tunnel to the first wide area receiver 31 through the transmission antenna 50.

In addition, the third wideband receiver 33 includes a configuration in which the first wideband receiver 31 and the second wideband receiver 32 are integrally formed, which will be described in detail with reference to FIG. 4.

4 is a block diagram showing a third wide area transmitter and receiver in the wireless relay device for tunnel according to the present invention.

Referring to FIG. 4, the third wideband receiver 33 is connected to the reception antenna 40 and the reception antenna 40, that is, the third wideband receiver 33 is connected to the reception antenna 40. The third common container 331, the third amplifying means 332 for amplifying the signal output from the third common container 331, and the channel of the signal amplified by the third amplifying means 332 as a set channel. Second channel selecting means 333 for converting, third frequency converting means 334 for converting a carrier wave of a signal of a selected channel output from the second channel selecting means 333 into an intermediate frequency and outputting the intermediate frequency; The third signal converting means 335 for synthesizing and branching the signal output from the three frequency converting means 334 to remove unnecessary noise and for branching the bidirectionally outputting signal, connecting the third signal converting means 335 to an optical cable. Or the third switching means 336 for blocking and the intermediate frequency signal output from the third signal converting means 335. The fourth frequency converting means 337 for converting the signal into a carrier wave, the fourth amplifying means for amplifying the signal converted by the fourth frequency converting means 337, the fourth amplifying means and the transmitting antenna 50 And a fourth common container 339 to match the direction.

Herein, the reception antennas 40 and the transmission antennas 50 respectively connected to the first to third wideband transmitters 31 to 33 are the same antennas and have the same reference numerals for convenience of description.

In addition, since each of the components included in the third wideband receiver 33 performs the same role as those included in the first wideband receiver 31 and the second wideband receiver 32, the description thereof is omitted. do.

According to the present invention, the optical cable is installed in the tunnel as described above, and the transmitting antenna 50 and the receiving antenna 40 are respectively provided to transmit and receive bidirectional signals to the broadcasting zone in the tunnel section. In addition, the first or third wideband transmitter / receiver 33 removes unnecessary noise by mixing and branching a signal received from the reception antenna 40 as a set channel in a tunnel section or an area outside the tunnel section, and cancels a phase difference. Since one optical cable can be installed in the tunnel section, it can provide high quality air and mobile communication service in the tunnel.

10: remote control unit 20: waveform monitoring unit
30: wide area transmitter and receiver 31: first wide area receiver
32: second wide area transceiver 33: third wide area transceiver
40: reception antenna 50: transmission antenna

Claims (11)

At least one receiving antenna for receiving airwaves and transmitting / receiving mobile communication signals installed in an area within a road or railway section where transmission of a wireless signal is easy;
One or more transmission antennas for transmitting and receiving air transmission and mobile communication signals installed in a tunnel in which a road or a railway is installed;
An optical cable extending in a tunnel and transmitting signals input and output from the reception antenna and the transmission antenna in both directions;
One or more wideband receivers each having a different frequency assigned to determine a channel of a signal input and output from the transmitting antenna and the receiving antenna, converting different frequency signals into frequencies of the same band, synthesizing and branching, and outputting them bidirectionally to the optical cable. Tunnel wireless relay device comprising a. According to claim 1, The wireless relay device for tunnel,
And further comprising a third wideband receiver for detecting a waveform output from the at least one wideband receiver,
And a remote control unit for receiving an output detection signal of the one or more wide area transmitters detected by the third wide area transmitter and receiver to determine whether there is an abnormality caused by a power failure or a failure. The method of claim 2, wherein the remote control unit,
And assigning different frequencies to each of the one or more wideband receivers, receiving a detection signal of the third wideband receiver, and reassigning frequencies allocated to the wideband receiver having an abnormality to other adjacent wideband receivers. Tunnel wireless repeater. The method of claim 1, wherein the receiving antenna
A donor antenna capable of receiving over-the-air signals and transmitting / receiving mobile communication signals, wherein one or more antennas are installed in an area where a radio signal can be easily transmitted in an area other than a tunnel. Wireless relay device for a tunnel, characterized in that applied to any one. The antenna of claim 1, wherein the transmission antenna is one or more remote antennas capable of transmitting air waves and transmitting / receiving mobile communication signals, and are connected to one of the one or more wide area transmission / reception units within a tunnel section and installed in the tunnel. Tunnel wireless repeater, characterized in that. The method of claim 1, wherein the at least one wide area transmitter and receiver
A first broadband transmitter and receiver for converting and amplifying a signal received by the reception antenna into a frequency allocated by a remote controller and outputting the signal in both directions of the optical cable;
Converts and amplifies a signal applied through the optical cable to a frequency assigned by the remote control unit and outputs the signal to the transmission antenna, or converts and amplifies a signal input from the transmission antenna to a frequency allocated by the remote control unit to the optical cable. A second wideband receiver for outputting; And
And a third wideband receiver for converting and amplifying a signal output from the reception antenna or another wideband transmitter to a frequency allocated by the remote controller, and outputting the signal to the transmitting antenna and the optical cable, respectively. The method of claim 6, wherein the first wide area receiving and receiving unit
A first common vessel sharing a frequency to transmit a received signal to the optical cable;
First amplifying means for low noise amplifying the received signal and for power amplifying the transmitted signal with a high output;
First channel selecting means for selecting, amplifying and outputting a channel of a received signal according to a frequency assigned by the remote control unit;
First frequency converting means for converting an intermediate frequency applied from said channel selecting 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, separating the mixed signal into an original signal, and branching the mixed signal in both directions to output the optical cable; And
And a first switching means for electrically connecting or disconnecting the optical cable and the output side of the signal conversion means by the control of the remote control unit. The method of claim 6, wherein the second wide area transceiver
Second switching means for connecting or blocking a line to enable input / output of the optical cable and a signal;
Second signal conversion means for converting, amplifying and outputting a received signal input from the optical cable connected through the second switching means into a signal having a frequency band allocated by the remote control unit;
Second frequency conversion means for converting the signal of the intermediate frequency output from the second signal conversion means into a carrier signal;
Second amplifying means for amplifying the signal output from the second frequency converting means;
And a common unit for outputting the signal amplified by the second amplifying means to the transmission antenna in accordance with the transmission direction of the transmission antenna. The method of claim 6, wherein the third wide area receiving and receiving unit
A third common container for sharing the signal received by the receiving antenna so that the signal has a direction corresponding to that of the optical cable;
Third amplifying means for amplifying the received signal output from the common unit;
Second channel selecting means for converting a channel of the signal amplified by the third amplifying means into a selected channel according to an assigned frequency;
Third frequency converting means for converting the signal of the selected channel output from the second channel selecting means into an intermediate frequency and outputting the intermediate frequency;
Third signal converting means for removing noise by mixing different signals output from the frequency converting means into a signal having the same frequency band and branching the mixed signal in both directions;
Third switching means for connecting or blocking a line to enable input and output of signals of the signal conversion means and the optical cable by the control of the remote control unit;
Fourth frequency converting means for converting the intermediate frequency signal output from the signal converting means into a carrier wave;
Fourth amplifying means for amplifying the signal converted by the fourth frequency converting means; And
And a fourth common container for outputting the signal output from the fourth amplifying means in accordance with the direction of the transmitting antenna. 10. The apparatus of claim 7 or 9, wherein the first and second channel selection means
The FIR filter of the channel required for the frequency allocated by the remote control unit is generated, the input signal is matched with the set reference value, synthesized into a final filter coefficient, and then applied as an individual filter coefficient to filter and amplify the selected channel. Tunnel wireless repeater, characterized in that for outputting. The apparatus of claim 6, wherein the first to third wideband receivers
Wireless repeater for tunnel, characterized in that having the same sampling clock to process a plurality of signals having different frequencies at the same time.

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