KR19980033490A - Underground wireless network relay - Google Patents

Abstract

The present invention relates to a general relay device for underground wireless network, and uses radio frequency such as broadcast signal (AM / FM), pager (mobile call receiver), mobile phone, fire fighting and police radio without noise or disconnection. In addition, the radio wave blocking area and the radio shading area appearing at the time of transmission and reception of radio waves are solved to improve the amount of service and the sensitivity. The signals received through the reception antennas 101 and 103-106 capable of receiving radio signals are AM / FM broadcasting and pager movement after being controlled through the main device 100 and outputted through the divider 200, 204, 206 and 208, and the impedance matcher 202, 210 and 212 and the terminating resistors 226-236. In addition to enabling communication and other wireless communication networks, when emergency situations occur in underground spaces, emergency broadcasts can be assigned to current audible airwaves (AM / FM) to promptly deliver and respond to the contents of accidents. To help Will.

Description

Underground wireless network relay

The present invention relates to a general relay device for underground wireless network, and more particularly, to reduce noise or drop in radio frequencies such as broadcast signal (AM / FM), pager (radio call receiver), mobile phone, fire fighting and police radio. The present invention relates to a comprehensive underground wireless network relay system that can be freely used, and has an increase in service volume and sensitivity by eliminating a radio wave blocking area and a radio shading area appearing at the time of transmitting and receiving radio waves.

The present invention is an improved invention of Utility Model Application No. 92-13749 filed by the applicant.

In general, repeaters are used in areas where radio waves are blocked or interfered by mountains, buildings, or terrain when using broadcasting, mobile communication, or wireless communication networks, or in areas where radio waves are difficult to reach, such as tunnels, mountains, underground parking lots, or subways. In order to solve the occurrence of radio wave insensitivity, radio signals are received and amplified from neighboring base stations to propagate the signal inside the dead zone, thereby switching to a call area that can receive services anytime and anywhere by users of broadcasting, mobile communication or wireless communication networks. Repeater is applied as the equipment.

Therefore, each broadcasting station, mobile carrier, and company operating a wireless communication network installs and operates a central office with enormous installation and operating costs, but it is still impossible to use wireless communication in many underground spaces.

Conventionally, referring to a block diagram of a multi-channel underground wireless broadcast repeater of FIG. 1, a reception antenna 1 for receiving an induced broadcast signal; An antenna receiver 2 for converting a radio signal received from a reception antenna into an electrical signal; An antenna divider 3 for distributing the signal received by the antenna receiver 2, an AM preamplifier 4 for preamplifying the AM signal distributed from the antenna divider 3 to a predetermined size, and the AM preamplifier ( An AM power amplifier 5 for power amplifying the signal amplified from 4), an FM preamplifier 6 for preamplifying the FM signal distributed from the antenna divider 3 to a predetermined size, and the FM preamplifier 6 A main apparatus 10 comprising an FM power amplifier 7 for power amplifying the signal amplified from the power amplifier; and a monitor 8 for monitoring AM and FM signals output from the AM power amplifier 5 and the FM power amplifier 7; A first divider (9) for distributing a signal input from the AM power amplifier (5); A second divider (11) for distributing the signal input from the FM power amplifier (7); A plurality of impedance matchers (12, 13) for matching impedances of the signals distributed from the first divider (9); AM induction lines 14 and 15 for outputting signals from the first and second impedance matchers 12 and 13 to the termination resistors 18 and 21, respectively; It consists of leaky coaxial cables 16 and 17 for outputting signals from the second distributor 11 to the terminal resistors 19 and 20, respectively.

In the conventional multi-channel underground wireless broadcasting repeater configured as described above, the radio signal transmitted through the receiving antenna is transmitted to the transmission cable (AM / FM) in the underground structure through the AM / FM preamplifier and the power amplifier. It was impossible to enter.

Accordingly, the applicant has filed an underground wireless broadcasting repeater to use a wireless communication network at a low cost in such a special environment area, but the device can notify people when an emergency occurs in the underground space. There was a problem in which a function (emergency broadcast assignment function) was missing.

In order to solve the problems described above, the present invention enables relaying of AM / FM broadcasting, pager mobile communication, and other wireless communication networks, as well as an airborne broadcasting that is audible when an emergency occurs in the underground space. The purpose is to provide a comprehensive relay system for underground wireless network that can transmit and respond to the contents of accidents by assigning emergency broadcasting to (AM / FM).

1 is a block diagram of a conventional multi-channel underground wireless broadcast repeater,

2 is a block diagram of the integrated wireless network underground relay according to the present invention,

3 is a block diagram of an emergency broadcasting panel according to the present invention;

4 is a block diagram of an automatic transfer board according to the present invention;

5 is a block diagram of a transmission and reception board according to the present invention.

6 is a block diagram of an output synthesizer according to the present invention.

-Explanation of symbols for the main parts of the drawings-

100: main unit 101, 103, 104: antenna

102: antenna receiver 105, 106: fire fighting radio terminal box

110: emergency station 111: microphone

112: microphone amplifier 113, 116: oscillator

114: AM modulator 115, 131, 132: AM amplifier

117: FM modulator 118, 134, 135: FM amplifier

119: PTT switch 120, 122: synthesizer

121: controller 130: automatic switching board

150: transmission and monitoring panel 151: adder

152: AM / FM tuner 153: PLL

154: AF amplifier 155: microcomputer

156: key 157: speaker

170: output synthesizer 171: AM bandpass filter

172: FM bandpass filter 173: First pager bandpass filter

174: third pager band pass filter 175: police radio band pass filter

176: mobile communication band pass filter 177: fire-wireless band pass filter

178a-178g, 202, 210, 212: impedance matcher

180: AM repeater 182: FM repeater

184: caller 1 repeater 186: caller 2 repeater

188: police radio repeater 190: mobile phone repeater

192: combiner / distributor 200, 204, 206, 208: distributor

214, 220, 224: AM guide line 216, 218 222: leakage coaxial cable

226, 228, 230, 232, 234, 236: termination resistor

SUMMARY OF THE INVENTION An object of the present invention is a base station wireless relay apparatus that separates, amplifies, converts, and transmits a received radio signal, wherein the first and second receivers receive modulated airwave radio signals (AM, FM, mobile communication, and wireless communication). And a third receiving antenna; An antenna receiver for converting a wireless signal received from the first receiving antenna into an electrical signal; An emergency broadcasting panel for amplifying, modulating, re-amplifying and synthesizing the input voice signal, an automatic switching panel for switching over-the-air broadcasting signals received from the antenna receiver and the emergency broadcasting signal input from the emergency broadcasting panel, and receiving from the automatic switching panel An AM repeater for relaying the received AM broadcast signal, an FM repeater for relaying the FM broadcast signal received from the automatic switching panel, first and second pager repeaters for relaying the pager signal received from the automatic switching panel, and Transmitting and monitoring panel to check the normal operation of the repeater by receiving and monitoring the detected signal from the AM repeater and FM repeater, and the police radio repeater for relaying the police radio signal to the second receiving antenna, and the third receiving antenna Mobile phone repeater for relaying mobile phone signal that has been decommissioned, and fired wireless through wired or wireless In order to combine a plurality of fire fighting radio terminal boxes for relaying signals, a coupling / distributor for combining and distributing radio signals received through the fire fighting radio terminal boxes, and a signal input from each repeater having a different band with a single transmission cable. A main device composed of an output synthesizer for synthesizing; A first divider for distributing the signal input from the AM repeater; A second divider for distributing a signal input to the output synthesizer; A third divider for redistributing the signal distributed from the second divider; A first impedance matcher for matching impedances of the divided signals inputted from the first divider; Second and third impedance matchers for matching impedances of the divided signals inputted from the third divider; AM induction lines for outputting signals from the first to third impedance matchers to terminal resistors, respectively; It can be achieved by providing an underground wireless network integrated relay device, characterized in that the leakage coaxial cable for outputting a signal from each of the second to fourth divider to the terminating resistor is included.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a block diagram of a comprehensive underground wireless network repeater according to the present invention, Figure 3 is a block diagram of the emergency broadcast panel, Figure 4 is a block diagram of the automatic switching panel, Figure 5 is a block diagram of the transmission monitoring panel. 6 is a block diagram of an output synthesizer.

The first receiving antenna 101 receives the abandoned aerial broadcasting waves AM and FM, the second receiving antenna 103 receives the abandoned police radio signal, and the third receiving antenna 104 receives the organic broadcasting signals. The radio signal of the mobile phone.

The antenna receiver 102 converts the wireless signal received from the first receiving antenna 101 into an electrical signal and outputs the electrical signal to the main device 100.

The emergency broadcast panel 110 amplifies, modulates, re-amplifies and synthesizes the input voice signal, and outputs the emergency broadcast panel 110. The emergency broadcast panel 110 converts the voice signal input from the outside into an electric signal. (111), a microphone amplifier (112) for amplifying a signal input from the microphone (111) to a predetermined size, an AM modulator (114) for amplitude modulation of the signal input from the microphone amplifier (112), and the AM A first oscillator 113 for applying a carrier frequency to the modulator 114, an AM amplifier 115 for amplifying a signal modulated by the AM modulator 114 to a predetermined size, and the microphone amplifier 112 FM modulator 117 for frequency-modulating a signal, a second oscillator 116 for applying a carrier frequency to the FM modulator 117, and an FM amplifier for amplifying a signal modulated by the FM modulator 117 to a predetermined size. 118 and the AM amplification First and second synthesizers 120 and 122 for synthesizing the signals input from the 115 and FM amplifiers 118, respectively, and outputting AM and FM high frequencies; and a PTT switch 119 for transmitting an emergency radiation signal; A controller 121 for determining a switching state of the PTT switch 119 and outputting a broadcast / emergency control signal is included.

The automatic switching panel 130 alternates the over-the-air broadcasting signal received from the antenna receiver 102 and the emergency broadcasting signal input from the emergency broadcasting panel 110, and the automatic switching panel 130 from the emergency broadcasting panel 110. A switching switch 133 for switching AM and FM signals to the input broadcast / emergency control signal, and the AM high frequency output of the emergency broadcasting panel 110 and the high frequency output of the antenna receiver 102 are switched from the switching switch 133. A plurality of AM amplifiers 131 and 132 for amplifying a predetermined size and outputting a high frequency wave, and switching from the switching switch 133 to the FM high frequency output of the emergency broadcasting panel 110 and the high frequency output of the antenna receiver 102 to a predetermined size. A plurality of FM amplifiers 134 and 135 that amplify and output a high frequency wave.

AM repeater 180 is to relay the AM broadcast signal received from the automatic switching panel 130, FM repeater 182 is to relay the FM broadcast signal received from the automatic switching panel 130, the first And the second pager repeaters 184 and 186 relay the pager signals received from the automatic switching board 130.

The transmission monitor 150 receives the signals detected from the AM repeater 180 and the FM repeater 182 and monitors the normal operation of the repeater. The transmission monitor 150 is applied from the AM and the FM antenna. An adder 151 for adding up radio signals, an AM / FM tuner 152 for tuning the radio signal input from the adder 151, and a PLL for inputting / outputting data for tuning the AM / FM tuner 152 ( 153, a microcomputer 155 for controlling the PLL 153, an AF amplifier 154 for amplifying a signal input and tuned from the AM / FM tuner 152 to a predetermined size, and the microcomputer 155 And a speaker 157 which inputs a key 156 to monitor transmission, and outputs an audio signal amplified from the AF amplifier 154 to the outside.

The police radio repeater 188 relays the police radio signal to the second receiving antenna 103, and the mobile telephone repeater 190 to relay the cell phone signal to the third receiving antenna 104. The plurality of fire-wireless terminal boxes (105, 106) is to relay the fired radio signal generated through a wired or wireless, the coupling / distributor 192 is a radio signal received through the fire-wireless terminal box (105, 106) To combine and distribute.

The output synthesizer 170 combines signals input from each repeater having different bands into one transmission cable, and the output synthesizer 170 passes an AM band signal passing only the input AM band signal without attenuation. 171, an FM bandpass filter 172 for passing only the input FM band signal without attenuation, a first phaser bandpass filter 173 for passing only the first phaser band signal input without attenuation, and a second input signal A second pager band pass filter 174 for passing only the pager band signal without attenuation, a police radio band pass filter 175 for passing only the input police radio band signal without attenuation, and an input mobile communication band signal only without attenuation A mobile communication band pass filter 176, a fire extinguishing radio band pass filter 177 for passing only an input fire extinguishing radio band signal without attenuation, and the band pass filters 171-177. From to match the impedance of the input signal consists of an impedance matching device (178a-178g) to output as the integration frequency.

The signal output from the main device 100 configured as described above is distributed through the following distributor.

That is, the first divider 200 distributes the signal input from the AM repeater 180, the second divider 204 distributes the signal input from the output synthesizer 170, and the third divider 206. Redistributes the signal distributed from the second divider 204.

In addition, the first impedance matcher 202 matches the impedance of the divided signal input from the first divider 200, and the second and third impedance matchers 210 and 212 are the third divider 206. The impedance of the divided signal input at

The AM guide lines 214, 220, and 224 output signals from the first to third impedance matchers 202, 210, and 212 to the terminating resistors 226, 232, and 236, respectively, and the leakage coaxial cables 216, 218 and 222 output signals from the second to fourth dividers 204 and 208 to the termination resistors 228, 230 and 234, respectively.

The invention thus constructed is characterized as described below.

That is, the air wave signals (AM, FM, mobile phones, fire communication, police radio and pager radio signals, etc.) induced by the first to third receiving antennas 101, 103, 104 are the antenna receiver 102 or the plurality of antennas. It is received by the fire fighting terminal box 105, 106 and the like is applied to the main device (100).

The radio signal and the air wave signal thus received are filtered and amplified by a band pass filter and a broadband amplifier respectively divided into AM or FM band and pager band.

The emergency broadcast panel 110 amplifies a voice signal input from the microphone 111 to a predetermined size in the microphone amplifier 112, and the amplified signal is divided into predetermined channels (for example, six channels), and for each channel. Separated into AM and FM signals. That is, in the case of an AM signal, the AM modulator 114 is combined with the carrier wave of the oscillator 113, modulated, and then amplified into a signal having a predetermined size by the AM amplifier 115, and then synthesized by the first synthesizer 120 to form an AM high frequency state. Is output. In addition, in the case of the FM signal, the FM modulator 117 is combined with the carrier wave of the oscillator 116, modulated, and then amplified into a signal of a predetermined size by the FM amplifier 118, and then synthesized by the second synthesizer 122 to the FM high frequency state. Is output.

In addition, when the emergency broadcast panel 110 operates the PTT switch 119 of the emergency broadcast panel 110 when the user wants to perform emergency broadcast, the power supply is applied and the emergency broadcast panel 110 is driven to the controller 121. As a result, the emergency switching signal is output to the automatic switching panel 130.

Therefore, the automatic switching panel 130 automatically switches between the radio signal applied from the antenna receiver 102 and the signal applied from the emergency broadcasting panel 110, and thus, the AM repeater 180, the FM repeater 182, and the first caller. It outputs to the repeater 184 and the second pager repeater 186. That is, the automatic switching panel 130 converts the signals applied from the emergency broadcasting panel 110 and the antenna receiver 102 into control signals inputted from the emergency broadcasting panel 110 and converts the signals into aerial broadcasting signals and emergency broadcasting signals. When the emergency broadcast signal is introduced in the emergency, but the emergency broadcast signal is transmitted in an emergency, the airwave broadcast is blocked and the emergency broadcast signal can be easily transmitted wirelessly in an emergency situation. In the block diagram of FIG. 4, when the control signal is input from the emergency broadcasting panel 110, the automatic switching panel 130 switches the switching switch 133 to block the AM and FM high frequencies, and blocks the AM and FM high frequency signals for emergency broadcasting. Will be printed.

On the other hand, in the output synthesizer 170, the AM / FM signal, the first and second call repeaters 184 and 186, the police radio repeater 188, the mobile telephone repeater 190 and the fire / wireless signal combination / distributor 192 Each signal input from) is synthesized and output. That is, in the block diagram of FIG. 6, when signals of each band (AM band signal, FM band signal, first and second pager band signals, police radio band signal, mobile communication band signal, fire fighting radio band signal, etc.) are inputted, And through the band pass filters (band pass filter of AM, FM, first and second pager, police radio, mobile communication, fire fighting radio, etc.) (171-177), and output only the corresponding signals without attenuation. The output signals are output as integrated high frequency signals through impedance matching units 178a to 178g to match the impedances.

In the transmission monitoring panel 150 of the present invention, the signal is detected after being detected at the outputs of the AM and FM repeaters 180 and 182, and is monitored. The signal applied from the AM antenna and the FM antenna is synthesized by the adder 151. Next, it is inputted to the AM / FM tuner 152 and tuned, and then amplified by the AF amplifier 154 to a predetermined level. Since the amplified voice signal is broadcast through the installed speaker 157, the broadcast signal can be monitored. The transmission monitoring panel 150 includes a PLL 153 for controlling the AM / FM tuner 152 and a microcomputer 155 for controlling the PLL 153 so that normal operation of each repeater can be monitored. .

The signals output from the AM and FM repeaters 180 and 182 are input to the first divider 200, and the synthesized signals output through the output synthesizer 170 are input to the second divider 204. The first divider 200 outputs a signal distributed to the third divider 206 and the first impedance matcher 202, and the first impedance matcher 202 terminates the resistor through the first AM induction line 214. 226, the third divider 206 distributes the signal to the second impedance matcher 210 and the third impedance matcher 212, and outputs the second and third impedance matchers 210. , 212 outputs the terminal resistors 232 and 236 through the third and fourth AM inductors 220 and 224, respectively.

In addition, the second divider 204 distributes the synthesized signal and outputs it to the terminating resistor 228 through the first leakage coaxial cable 216 and to the fourth divider 208. The fourth distributor 208 outputs the second and third leakage coaxial cables 218 and 222 to the termination resistors 230 and 234. The termination resistors 228, 230, and 234 are connected to a wire through which a signal is input or output.

The relay device of the present invention includes a receiver (or a preamplifier) and a transmitter, and includes a duplexer in the case of two-way communication such as a police radio, a mobile phone, and a fire radio.

As described above, it will be readily understood by those skilled in the art that the underground wireless network integrated relay device of the present invention has a service function capable of relaying any other wireless communication, and the technical scope of the present invention is not limited to the above. Will be self explanatory.

As described above, the integrated underground wireless network relay device of the present invention includes a main device and an additional device capable of receiving and relaying not only an air wave signal but also an emergency broadcast signal in a radio dead zone or a radio wave blocking area, and thus, particularly in an emergency in an underground space. When a situation occurs, emergency broadcasts can be assigned to the currently audible airwaves (AM / FM) to promptly deliver and respond to the contents of the accident, resulting in the prevention of safety accidents and rapid emergency action. Minimize the effect.

Claims (5)

In the underground wireless repeater for separating, amplifying and converting the received radio signal, First, second, and third receiving antennas (101, 103, 104) for receiving modulated over-the-air radio signals (AM, FM, mobile communications and wireless communications); An antenna receiver 102 for converting a wireless signal received from the first receiving antenna into an electrical signal; An emergency broadcasting panel 110 for amplifying, modulating, re-amplifying and synthesizing the input voice signal and outputting the same; An automatic switching panel 130 for switching the over-the-air broadcasting signal received from the antenna receiver 102 and the emergency broadcasting signal input from the emergency broadcasting panel 110; An AM repeater 180 for relaying the AM broadcast signal received from the automatic switching panel 130; FM repeater 182 for relaying the FM broadcast signal received from the automatic switching panel 130, First and second pager repeaters 184 and 186 for relaying the pager signal received from the automatic switching board 130; A transmission and monitoring panel 150 for receiving a signal detected from the AM repeater 180 and the FM repeater 182 to monitor whether the repeater is normally operated; A police radio repeater 188 for relaying the police radio signal generated by the second receiving antenna 103; A mobile telephone repeater 190 for relaying the mobile telephone signal induced by the third receiving antenna 104; A plurality of fire-wireless radio terminal boxes 105 and 106 for relaying the fire-fired radio signal through wired or wireless; A combiner / distributor 192 for combining and distributing radio signals received through the fire fighting radio terminal boxes 105 and 106; A main device (100) consisting of an output synthesizer (170) for combining the signals input from the repeaters having different bands into one transmission cable; A first divider (200) for distributing the signal input from the AM repeater (180); A second divider 204 for distributing the signal input to the output synthesizer 170; A third divider (206) for redistributing the signal distributed from the second divider (204); A first impedance matcher (202) for matching impedances of the divided signals inputted from the first divider (200); Second and third impedance matchers (210, 212) for matching impedances of the divided signals input from the third divider (206); AM inductors 214, 220 and 224 for outputting signals from the first to third impedance matchers 202, 210 and 212 to the termination resistors 226, 232 and 236, respectively; Underground wireless, characterized in that it comprises a leakage coaxial cable (216, 218, 222) for outputting a signal from the second to fourth distributors (204, 206, 208) to the termination resistors (228, 230, 234), respectively. Network integrated repeater. According to claim 1, The emergency broadcast panel 110 is a microphone 111 for converting the voice signal input from the outside into an electrical signal, A microphone amplifier 112 for amplifying a signal input from the microphone 111 to a predetermined size; An AM modulator 114 for amplitude-modulating the signal input from the microphone amplifier 112; A first oscillator 113 for applying a carrier frequency to the AM modulator 114, An AM amplifier 115 for amplifying a signal modulated by the AM modulator 114 to a predetermined size; FM modulator 117 for frequency-modulating the signal input from the microphone amplifier 112, A second oscillator 116 for applying a carrier frequency to the FM modulator 117, An FM amplifier 118 for amplifying the signal modulated from the FM modulator 117 to a predetermined size; First and second synthesizers 120 and 122 for synthesizing signals input from the AM amplifier 115 and the FM amplifier 118 and outputting AM and FM high frequencies, respectively; PTT switch 119 for transmitting an emergency radiation signal, Underground wireless network integrated relay device, characterized in that further comprises a controller 121 for determining the switching state of the PTT switch (119) and outputs a broadcast / emergency control signal. According to claim 1, The automatic switching panel 130 is a switching switch 133 for switching the AM and FM signal to the broadcast / emergency control signal input from the emergency broadcasting panel 110, A plurality of AM amplifiers 131 and 132 which are switched from the transfer switch 133 to amplify the AM high frequency output of the emergency broadcasting panel 110 and the high frequency output of the antenna receiver 102 to a predetermined size and output a high frequency; A plurality of FM amplifiers 134 and 135 which are switched from the switching switch 133 to amplify the FM high frequency output of the emergency broadcasting panel 110 and the high frequency output of the antenna receiver 102 to a predetermined size are further included. Underground wireless network comprehensive relay device, characterized in that. The apparatus of claim 1, wherein the transmission and reception board 150 includes: an adder 151 for adding up radio signals applied from AM and FM antennas; An AM / FM tuner 152 for tuning the radio signal input from the adder 151, A PLL 153 for inputting and outputting data for tuning the AM / FM tuner 152; A microcomputer 155 for controlling the PLL 153, An AF amplifier 154 that amplifies the input signal tuned from the AM / FM tuner 152 to a predetermined size, and A key 156 for inputting the microcomputer 155 to monitor transmission; Underground wireless network comprehensive relay device, characterized in that further comprises a speaker (157) for outputting the voice signal amplified from the AF amplifier 154 to the outside. The AM synthesizer of claim 1, wherein the output synthesizer 170 includes an AM band pass filter 171 for passing only the input AM band signal without attenuation; An FM band pass filter 172 which passes only the input FM band signal without attenuation; A first pager bandpass filter 173 for passing only the first pager band signal input without attenuation; A second pager bandpass filter 174 for passing only the input second pager band signal without attenuation; A police radio band pass filter 175 for passing only the police radio band signal inputted without attenuation; A mobile communication band pass filter 176 for passing only the input mobile communication band signal without attenuation; A fire fighting radio band pass filter 177 for passing only the fire fighting radio band signal without attenuation; Underground wireless network integrated relay device, characterized in that the bandpass filter (171-177) further comprises an impedance matcher (178a-178g) to match the impedance of the signal input from the integrated frequency.