KR20030084078A - Wireless lan service system using mobile telecommunication network - Google Patents

Abstract

PURPOSE: A wireless LAN service system using a mobile communication network is provided to use an existing mobile communication network using an optical repeater without increasing another wire line, thereby relaying a wireless LAN service with a mobile communication service as reducing installation cost. CONSTITUTION: An access point device(100) connects a wireless LAN signal with a wire Internet network. A donor device(200) combines a mobile communication signal with the wireless LAN signal to convert the combined signal into an optical signal to transmit the optical signal, or restores the mobile communication signal and the wireless LAN signal from the received optical signal, outputs the restored wireless LAN signal to the access point device(100), and outputs the restored mobile communication signal to a mobile communication network. A remote device(300) restores the mobile communication signal and the wireless LAN signal from the received optical signal to relay the restored signals to a terminal, or combines the mobile communication signal with the wireless LAN signal to convert the combined signal into the optical signal, and transmits the optical signal to the donor device(200).

Description

Wireless LAN service system using mobile communication network {WIRELESS LAN SERVICE SYSTEM USING MOBILE TELECOMMUNICATION NETWORK}

The present invention relates to a wireless LAN service system using a mobile communication network that can relay a wireless LAN service with a mobile communication service using an existing mobile communication network using an optical repeater without additional wireline extension.

In general, in order to send and receive data through the Internet, a device such as a modem or a LAN card must be installed in the PC. In particular, in the case of a wireless LAN capable of transmitting and receiving data wirelessly, there is an advantage that it can be conveniently used without being restricted by space.

For such a WLAN service, an access point device must be installed in a corresponding area, an external case must be manufactured separately, and a wired line must be added to the access point device.

On the other hand, in the mobile communication service, a plurality of base stations perform transmission and reception with a mobile terminal within a base station communication radius so that a mobile terminal user can communicate regardless of the location.

However, since there is a limit in the area where the base station can communicate, a company providing a communication service needs a large number of base stations to provide a communication service. In addition, the base station should be additionally installed in order to solve the shadow area that cannot communicate due to the geographical problem.

Recently, RF repeaters, optical repeaters, etc. have been used to solve such shadow areas. However, the RF repeater has problems such as poor radio frequency isolation due to the adjacent base station antenna and shadow area antenna being installed adjacent to each other, and poor voice quality due to feedback of the RF signal. As a result, more optical repeaters are used than RF repeaters.

The present invention has been made to solve such a problem, the present invention is a mobile communication network that can relay a wireless LAN service with a mobile communication service using an existing mobile communication network using an optical repeater without additional wireline extension The purpose is to provide a wireless LAN service system using.

Another object of the present invention is to provide a WLAN service system using a mobile communication network capable of relaying by supporting a half-duplex method of a WLAN signal in a mobile communication network.

1 is a block diagram showing an embodiment of a wireless LAN service system using a mobile communication network according to the present invention,

FIG. 2 is a block diagram showing another embodiment of the remote device shown in FIG. 1;

3 is a block diagram showing another embodiment of a wireless LAN service system using a mobile communication network according to the present invention.

<Description of Symbols for Main Parts of Drawings>

100: access point device 200: donor device

210: first forward amplification means 220: first coupling means

230: first optical transceiver 240: first distribution means

250: first reverse amplification means 300: remote device

310: second optical transceiver 320: second distribution means

330: second forward amplification means 340: detection means

350: network management control means 360: second reverse amplification means

370: second coupling means

In order to achieve the above object, an embodiment of the present invention provides an access point apparatus for connecting a wired Internet network and a wireless LAN signal; The mobile communication signal and the wireless LAN signal output from the access point device are combined and then converted into an optical signal and transmitted, or the restored wireless signal is restored after the mobile communication signal and the wireless LAN signal are restored from the received optical signal. A donor device for outputting to the point apparatus and outputting the restored mobile communication signal to the mobile communication network; Restoring the mobile communication signal and the wireless LAN signal from the optical signal transmitted by the donor device and relaying the mobile communication signal and the wireless LAN signal, or converting the mobile communication signal and the wireless LAN signal transmitted backward from the terminal side into an optical signal and Provided is a wireless LAN service system using a mobile communication network including a remote device transmitting to a donor device.

The donor device and the remote device are characterized in that the transmission and reception path of the WLAN signal is separated and transmitted and received in a half-duplex communication method.

The donor device comprises: first forward amplifying means for amplifying the mobile communication signal and the wireless LAN signal; First combining means for combining signals amplified by the first forward amplifying means; A first optical transceiver converting the signal combined by the first coupling means into an optical signal and transmitting the optical signal to the remote device, or converting the optical signal received from the remote device into an RF signal; First distributing means for distributing the RF signal converted by the first optical transceiver; And first reverse amplifying means for extracting and amplifying a mobile communication signal and a wireless LAN signal from the signals distributed by the first distribution means, respectively.

The first forward amplifying means comprises: a first forward mobile communication amplifier comprising a first attenuator and a first amplifier for amplifying the mobile communication signal to a predetermined magnitude; And a first forward WLAN amplifier comprising a second attenuator and a second amplifier for amplifying the WLAN signal to a predetermined size.

The first forward WLAN amplifier further comprises a first down converter for outputting the frequency of the mobile communication signal amplified by the second amplifier down to a predetermined frequency to output to the first coupling means.

The first reverse amplification means is a first reverse WLAN amplifier comprising a first filter, a third attenuator and a third amplifier for extracting a mobile communication signal from the signal received by the first optical transceiver and amplifying the mobile communication signal to a predetermined size. ; And a first reverse mobile communication amplifier comprising a second filter, a fourth attenuator, and a fourth amplifier for extracting a WLAN signal from the signal received by the first optical transceiver and amplifying the WLAN signal to a predetermined size. .

The first reverse WLAN amplifier unit further includes a first up converter to the first filter and the third attenuator for outputting the WLAN signal transmitted from the remote device by downgrading the frequency to the original frequency. It is done.

The remote device may include a second optical transceiver converting an optical signal received from the donor device into an RF signal or converting an input signal into an optical signal and transmitting the optical signal to the donor device; Second distribution means for distributing the converted RF signal in the second optical transceiver; Second forward amplifying means for extracting and amplifying a mobile communication signal and a WLAN signal from the signals distributed by the second distribution means, respectively; Sensing means for sensing an output level of the second forward amplifying means; Network management control means for receiving an output level sensed by the sensing means and controlling the output of the second forward amplifying means to be constant; Second reverse amplifying means for extracting and amplifying a mobile communication signal and a WLAN signal for transmission to the donor device, respectively; And second combining means for combining the signal amplified by the second reverse amplifying means and outputting the combined signal to the second optical transceiver.

The second forward amplifying means includes a second forward mobile communication amplifier comprising a third filter, a fifth attenuator, a fifth amplifier, and a fourth filter for amplifying the mobile communication signal distributed by the second distribution means to a predetermined size. ; And a second forward WLAN amplifier comprising a fifth filter, a sixth attenuator, a sixth amplifier, and a sixth filter for amplifying the WLAN signal distributed by the second distribution means to a predetermined size. .

The second forward WLAN amplifier further includes a second up converter between the fifth filter and the sixth attenuator for outputting the WLAN signal transmitted from the donor device by downgrading the frequency to the original frequency. It features.

The second reverse amplification means includes: a second reverse WLAN amplification unit including a seventh filter and a first low noise amplifier for extracting and amplifying a WLAN signal transmitted from a terminal to a predetermined size; And a second reverse mobile communication amplifier comprising an eighth filter and a second low noise amplifier for extracting and amplifying the mobile communication signal transmitted from the terminal to a predetermined size.

The second reverse WLAN amplification unit may further include a second down converter configured to downgrade the WLAN signal low noise amplified by the first low noise amplifier to a predetermined frequency and output the same to the second coupling means.

The sensing means may include first sensing means for sensing an output level of the second forward mobile communication amplifier; And second sensing means for sensing an output level of the second forward WLAN amplifier.

In another embodiment of the present invention, the second reverse WLAN amplifier may include the first low noise amplifier for amplifying the WLAN signal extracted from the sixth filter to a predetermined size.

The objects, features and advantages of the present invention will be more readily understood by reference to the accompanying drawings and the following detailed description.

The present invention proposes as a preferred embodiment a WLAN service system implemented to relay a WLAN signal and a mobile communication signal together using an existing mobile communication network. In the present invention, the existing mobile communication network is preferably a network supporting mobile communication such as cellular, PCS, and IMT 2000. In particular, a mobile communication network using an optical repeater connected to a base station and an optical cable is proposed as the most preferred embodiment.

1 is a block diagram showing an embodiment of a wireless LAN service system using a mobile communication network according to the present invention. FIG. 1A is a block diagram of an overall system, FIG. 1B is a block diagram of a donor device, and FIG. 1C is a block diagram of a remote device.

Referring to FIG. 1, the present invention provides a donor device 200 and a donor device 200 installed in an access point device 100 and a base station for connecting a wired Internet network (eg, an Ethernet network) and a wireless LAN signal. And a remote device 300 connected by an optical cable. In the present exemplary embodiment, the donor device 200 and the remote device 300 transmit and receive a WLAN signal by using a half-duplex communication method by separating a transmission and reception path of a WLAN signal.

In the case of the system configured as in the present embodiment, up to 16 remote devices 300 may be operated in one donor device 200.

The donor device 200 combines the mobile communication signal with the wireless LAN signal output from the access point device 100, converts the signal into an optical signal, and transmits the converted optical signal to the remote device 300. After recovering the mobile communication signal and the wireless LAN signal from the optical signal transmitted by the remote device 300, the restored wireless LAN signal is output to the access point device 100, and the restored mobile communication signal is transmitted to the mobile communication network. Output

The remote device 300 restores the mobile communication signal and the wireless LAN signal from the optical signal transmitted from the donor device 200 and relays the mobile communication signal to the terminal, or combines the mobile communication signal and the wireless LAN signal transmitted backward from the terminal side. The light signal is converted and transmitted to the donor device 200.

The donor device 200 may include a first forward amplifying means 210 for amplifying a mobile communication signal and a WLAN signal, and a first combining means for combining amplified signals respectively from the first forward amplifying means 210 ( The first optical transceiver 220 converts the signal coupled by the first coupling means 220 into an optical signal and transmits the optical signal to the remote device 300 or converts the optical signal received from the remote device 300 into an RF signal. 230, a first distribution means 240 for distributing the RF signal converted by the first optical transceiver 230, and a mobile communication signal and a WLAN signal from the signals distributed by the first distribution means 240, respectively. First reverse amplification means 250 for extracting and amplifying.

The first forward amplification means 210 includes a first forward mobile communication amplifier 210a and a first forward WLAN amplifier 210b. The first forward mobile communication amplifier 210a includes a first attenuator 212a and a first amplifier 214a for amplifying a mobile communication signal to a predetermined size, and the first forward WLAN amplifier 210b includes: And a second attenuator 212b and a second amplifier 214b for amplifying the WLAN signal to a predetermined magnitude.

In addition, the first reverse amplification means 250 includes a first reverse WLAN amplifier 250a and a first reverse mobile communication amplifier 250b. The first reverse WLAN amplifier 250a may include a first filter 252a and a third attenuator 254a for extracting a mobile communication signal from a signal received by the first optical transceiver 230 and amplifying the mobile communication signal to a predetermined size. The first reverse mobile communication amplifier 250b includes a second filter 256a for extracting a WLAN signal from a signal received by the first optical transceiver 230 and amplifying the WLAN signal to a predetermined size. 252b), fourth attenuator 254b, and fourth amplifier 256b.

On the other hand, the remote device 300 is a second optical transceiver 310 for converting an optical signal received from the donor device 200 to an RF signal or converts an input signal into an optical signal and transmits it to the donor device 200, and 2 for distributing and amplifying the mobile communication signal and the WLAN signal from the second distribution means 320 for distributing the RF signal converted by the optical transceiver 310 and the signals distributed by the second distribution means 320, respectively. The second forward amplifying means 330, the sensing means 340 for detecting the output level of the second forward amplifying means 330, and the second forward amplifying means by receiving the output level detected by the sensing means 340 ( Network management control means 350 for controlling the output of the 330 to be constant, the second reverse amplification means 360 for extracting and amplifying a mobile communication signal and a wireless LAN signal for transmission to the donor device 200, respectively; By combining the signal amplified by the second reverse amplification means 360 2 and a second coupling means (370) for outputting the optical transceiver (310).

The second forward amplification means 330 includes a second forward mobile communication amplifier 330a and a second forward WLAN amplification unit 330b. The second forward mobile communication amplifier 330a includes a third filter 332a, a fifth attenuator 334a, and a fifth amplifier for amplifying the mobile communication signal distributed by the second distribution means 320 to a predetermined size. 336a) and a fourth filter 338a, and the second forward WLAN amplifier 330b includes a fifth filter 332b for amplifying the WLAN signal distributed by the second distribution means 320 to a predetermined size. ), A sixth attenuator 334b, a sixth amplifier 336b, and a sixth filter 338b.

The second reverse amplification means 360 includes a second reverse WLAN amplifier 360a and a second reverse mobile communication amplifier 360b. The second reverse WLAN amplifier 360a includes a seventh filter 362a and a first low noise amplifier 364a for extracting and amplifying the WLAN signal transmitted from the terminal to a predetermined size. The mobile communication amplifier 360b includes an eighth filter 362b and a second low noise amplifier 364b for extracting and amplifying the mobile communication signal transmitted from the terminal to a predetermined size.

The detection means 340 detects the output level of the second forward mobile communication amplifier 330a and the second detection means for detecting the output level of the second forward WLAN amplifier 330b. And means 344.

FIG. 2 is a block diagram showing another embodiment of the remote device shown in FIG. Referring to FIG. 2, the second reverse WLAN amplifier 360a includes a first low noise amplifier 364a for amplifying the WLAN signal extracted by the sixth filter 338b to a predetermined size.

Since the remote device 300 transmits / receives in a half-duplex communication method, even if one antenna is used, transmission and reception are separated, and thus the service is not affected.

3 is a block diagram showing another embodiment of a wireless LAN service system using a mobile communication network according to the present invention. 3A shows a block diagram of a donor device, and FIG. 3B shows a block diagram of a remote device.

Another embodiment of the present invention adds one down converter and one up converter to the donor device 200 and the remote device 300 shown in FIG. The reason for this configuration is that when the frequency to be relayed (for example, 2.4GHz) exceeds the frequency band (for example, 1.5 GHz maximum) that the optical transceivers 230 and 310 can support, the optical transceivers 230 and 310 are exceeded. This is because there is inconvenience to replace.

Therefore, when one side down the frequency (for example, 700MHz) and transmits, the other side restores the frequency and is configured to relay.

The first down converter 260 is provided in the first forward WLAN amplifier 210b to downgrade the frequency of the mobile communication signal amplified by the second amplifier 214b to a predetermined frequency and output it to the first coupling means 220. More is included.

In the second forward WLAN amplifier 330b, a second up-converter 380 for outputting the WLAN signal transmitted by lowering the frequency from the donor device 200 to the original frequency and outputting the fifth filter 332b. ) And a sixth attenuator 334b.

In addition, the second reverse WLAN amplifier 360a includes a second down converter for downgrading the WLAN signal low noise amplified by the first low noise amplifier 364a to a predetermined frequency and outputting the same to the second coupling means 370. 390 is further included.

In addition, the first uplink WLAN amplifier 250a includes a first up converter 270 for outputting the WLAN signal transmitted by downgrading the frequency from the remote apparatus 300 to the original frequency and outputting the first filter 252a. ) And the third attenuator 254a.

In the present embodiment, it is preferable to use a combiner as the first and second coupling means 220 and 370 and a divider as the first and second distributing means 240 and 320.

As another embodiment of the present invention, in contrast to FIG.

As another embodiment of the present invention, the access point device 100 may be mounted inside the donor device 200 in a rackmount manner.

In the present invention configured as described above, a process of relaying a WLAN signal and a mobile communication signal together using an existing mobile communication network will be described in detail with reference to FIG. 1. First, a process of forward transmission to the remote device 300 through the donor device 200 will be described.

The access point apparatus 100 converts a digital signal received from a wired internet network into a wireless LAN signal in an RF form and transmits the digital signal to the donor apparatus 200.

The donor device 200 receives an RF type mobile communication signal from the communication network, and receives an RF type wireless LAN signal from the access point device 100. The first forward amplification means 210 of the donor device 200 amplifies the mobile communication signal and the wireless LAN signal, respectively.

That is, the first attenuator 212a and the first amplifier 214a of the first forward mobile communication amplifier 210a amplify the mobile communication signal to a predetermined size, and the first forward WLAN amplifier 210b of the first forward WLAN amplifier 210b. The second attenuator 212b and the second amplifier 214b amplify the WLAN signal to a predetermined size.

As such, the mobile communication signal and the wireless LAN signal amplified by the first forward amplifying unit 210 are combined by the first combining unit 220 and output to the first optical transceiver 230. The first optical transceiver 230 converts the signal coupled by the first coupling means 220 into an optical signal, and then transmits the signal to the remote device 300 through the optical cable.

The second optical transceiver 310 of the remote device 300 converts the optical signal received from the donor device 200 back to an RF signal, and the RF converted signal is moved in the second forward distribution means 320 in a second forward direction. It is distributed to the communication amplifier 330a and the second forward WLAN amplifier 330b. In this case, since the signal distributed by the second distribution means 320 is only a signal divided into two, the mobile communication signal and the WLAN signal exist together.

The second forward amplifying means 330 extracts and amplifies the mobile communication signal and the WLAN signal from the signals distributed by the second distribution means 320, respectively.

The third filter 332a of the second forward mobile communication amplifier 330a extracts the mobile communication signal, and the fifth attenuator 334a and the fifth amplifier 336a amplify the mobile communication signal to a predetermined size. Next, the fourth filter 338a filters the filter once more and outputs it through the antenna (mobile communication TX).

The fifth filter 332b of the second forward WLAN amplifier 330b extracts the WLAN signal, amplifies the sixth attenuator 334b and the sixth amplifier 336b to a predetermined size, and the sixth filter ( 338b) filters the output once more (Wireless LAN TX).

At this time, the first sensing means 342 detects the output level of the second forward mobile communication amplifier 330a, and the second sensing means 344 measures the output level of the second forward WLAN amplifier 330b. Detect. The network management control means 350 receives the output level detected by the first sensing means 342 and the second sensing means 344, and the fifth attenuator 334a so that the output of the second forward amplifying means 330 is constant. And the sixth attenuator 334b, respectively.

For example, assume that the final rated output level of the second forward mobile communication amplifier 330a is 20 dBm and the basic attenuation value of the fifth attenuator 334a is 19 dB. If the final rated output level of the second forward mobile communication amplifier 330a drops to 19 dBm, the network management control means 350 controls the fifth attenuator 334a to attenuate 18 dB to output 20 dBm. On the contrary, when the final rated output of the second forward mobile communication amplifier 330a increases, the network management control means 350 controls the fifth attenuator 334a to further attenuate by the increased output.

On the other hand, the process of the reverse transmission from the terminal side to the donor device 200 will be described.

The mobile communication signal (mobile communication RX) and the wireless LAN signal (wireless LAN RX) transmitted from the terminal side to the donor device 200 are respectively extracted and amplified by the second reverse amplification means 360. The seventh filter 362a of the second reverse WLAN amplifier 360a extracts the WLAN signal and amplifies the first low noise amplifier 364a to a predetermined size.

The eighth filter 362b of the second reverse mobile communication amplifier 360b extracts a mobile communication signal and amplifies the second low noise amplifier 364b to a predetermined size.

The second coupling means 370 combines the signal amplified by the second reverse amplification means 360 and outputs the signal to the second optical transceiver 310, and the second optical transceiver 310 is connected to the second coupling means 370. The combined signal is converted into an optical signal and transmitted to the donor device 200.

The first optical transceiver 230 of the donor device 200 converts an optical signal received from the remote device 300 into an RF signal, and the first distribution unit 240 converts the RF converted signal into a first reverse WLAN. Distribution is performed between the amplifier 250a and the first reverse mobile communication amplifier 250b. At this time, since the signal distributed by the first distribution means 240 is only divided into two signals, the mobile communication signal and the WLAN signal exist together.

The first reverse amplification means 250 extracts and amplifies the mobile communication signal and the WLAN signal from the signals distributed by the first distribution means 240, respectively. The first filter 252a of the first uplink WLAN amplifier 250a extracts a mobile communication signal and amplifies the third attenuator 254a and the third amplifier 256a to a predetermined size.

The second filter 252b of the first reverse mobile communication amplifier 250b extracts the WLAN signal and amplifies the fourth attenuator 254b and the fourth amplifier 256b to a predetermined size.

The mobile communication signal and the wireless LAN signal extracted and amplified by the first reverse amplification unit 250 are respectively output to the mobile communication network and the access point apparatus 100. The access point apparatus 100 converts the wireless LAN signal received from the donor apparatus 200 into a digital signal form and outputs it to a wired internet network.

In the present embodiment, the donor device 200 and the remote device 300 transmit and receive the WLAN signal in a half-duplex manner by separating the transmission and reception paths of the WLAN signal. In other words, the time until the transmission is terminated so that the CPU (not shown) of the access point apparatus 100 can transmit the data reliably without causing a collision of data by the CSMA / CA (Carrier Sense Multiple Access / Collision Avoidance) method. It receives and reserves data and transmits and receives data in half-duplex communication. It stops the transmission during the reception operation and stops the reception during the transmission operation.

2 and 3 are also relayed through the same process as described above. 2, the remote device 300 operates in the same manner as in FIG. 1 except that the remote device 300 transmits and receives a WLAN signal in a half-duplex communication using the same antenna.

In the case of FIG. 3, the operation is performed in the same manner as in FIG. 1 except that the frequency is down and transmitted to restore it up again.

The present invention is not limited to the embodiments described above, and various modifications and changes can be made by those skilled in the art, which are included in the spirit and scope of the present invention as defined in the appended claims.

As described above, the present invention can use a conventional mobile communication network using an optical repeater without additional wireline extension to relay a wireless LAN service together with a mobile communication service, and reduce facility costs.

In particular, by using an optical repeater to minimize the loss occurring during the transmission and provide high-quality high-speed data transmission, the network management control unit can automatically control to detect the output of the WLAN signal and output regularly, remote maintenance Is possible.

In addition, when the access point device is built in a donor device in a rack mount method, the external case manufacturing cost for manufacturing the outdoor equipment can be reduced, and the addition and management of the device can be efficiently performed.

In addition, in the case of a wireless LAN signal, there is an advantage of supporting a half-duplex communication method in a mobile communication network by changing a transmission / reception path.

Claims (14)

An access point device for connecting a wired internet network and a wireless LAN signal; The mobile communication signal and the wireless LAN signal output from the access point device are combined and then converted into an optical signal and transmitted, or the restored wireless signal is restored after the mobile communication signal and the wireless LAN signal are restored from the received optical signal. A donor device for outputting to the point apparatus and outputting the restored mobile communication signal to the mobile communication network; And The donor device recovers the mobile communication signal and the wireless LAN signal from the optical signal transmitted by the donor device and relays the mobile communication signal and the wireless LAN signal. Wireless LAN service system using a mobile communication network including a remote device for transmitting to the device. The donor device and the remote device of claim 1, wherein A wireless LAN service system using a mobile communication network, characterized in that the transmission and reception path of the wireless LAN signal is separated and transmitted and received in a half-duplex communication method. The donor device according to claim 1 or 2, wherein First forward amplifying means for amplifying the mobile communication signal and the wireless LAN signal, respectively; First combining means for combining signals amplified by the first forward amplifying means; A first optical transceiver converting the signal combined by the first coupling means into an optical signal and transmitting the optical signal to the remote device, or converting the optical signal received from the remote device into an RF signal; First distributing means for distributing the RF signal converted by the first optical transceiver; And And a first reverse amplifying means for extracting and amplifying a mobile communication signal and a wireless LAN signal from the signals distributed by the first distribution means, respectively. The method of claim 3, wherein the first forward amplifying means A first forward mobile communication amplifier comprising a first attenuator and a first amplifier for amplifying the mobile communication signal to a predetermined size; And And a first forward WLAN amplifier comprising a second attenuator and a second amplifier for amplifying the WLAN signal to a predetermined size. The method of claim 4, wherein the first forward WLAN amplifier unit And a first down converter for downgrading the frequency of the mobile communication signal amplified by the second amplifier to a predetermined frequency and outputting the first down converter to the first coupling means. The method of claim 5, wherein the first reverse amplification means A first reverse WLAN amplification unit comprising a first filter, a third attenuator, and a third amplifier for extracting and amplifying a mobile communication signal from a signal received by the first optical transceiver to a predetermined size; And And a first reverse mobile communication amplifier comprising a second filter, a fourth attenuator, and a fourth amplifier for extracting a WLAN signal from the signal received by the first optical transceiver and amplifying the WLAN signal to a predetermined size. Wireless LAN service system using a communication network. The method of claim 6, wherein the first reverse WLAN amplification unit The first filter and the third attenuator further comprises a first up-converter for outputting the WLAN signal transmitted from the remote device down to the original frequency. Service system. The method of claim 1 or 2, wherein the remote device A second optical transceiver for converting an optical signal received from the donor device into an RF signal or converting an input signal into an optical signal and transmitting the optical signal to the donor device; Second distribution means for distributing the converted RF signal in the second optical transceiver; Second forward amplifying means for extracting and amplifying a mobile communication signal and a WLAN signal from the signals distributed by the second distribution means, respectively; Sensing means for sensing an output level of the second forward amplifying means; Network management control means for receiving an output level sensed by the sensing means and controlling the output of the second forward amplifying means to be constant; Second reverse amplifying means for extracting and amplifying a mobile communication signal and a WLAN signal for transmission to the donor device, respectively; And And a second combining means for combining the signal amplified by the second reverse amplifying means and outputting the combined signal to the second optical transceiver. 9. The apparatus of claim 8, wherein the second forward amplification means A second forward mobile communication amplifier comprising a third filter, a fifth attenuator, a fifth amplifier, and a fourth filter for amplifying the mobile communication signal distributed by the second distribution means to a predetermined size; And And a second forward WLAN amplifier comprising a fifth filter, a sixth attenuator, a sixth amplifier, and a sixth filter for amplifying the WLAN signal distributed by the second distribution means to a predetermined size. Wireless LAN service system using a communication network. 10. The method of claim 9, wherein the second forward WLAN amplifier unit And a second up-converter between the fifth filter and the sixth attenuator for outputting the WLAN signal transmitted by downgrading the frequency from the donor device to the original frequency. LAN service system. The method of claim 9, wherein the second reverse amplification means A second reverse WLAN amplifier comprising a seventh filter and a first low noise amplifier for extracting and amplifying the WLAN signal transmitted from the terminal to a predetermined size; And And a second reverse mobile communication amplifier comprising an eighth filter and a second low noise amplifier for extracting and amplifying the mobile communication signal transmitted from the terminal to a predetermined size. The wireless LAN amplifier of claim 11, wherein the second reverse WLAN amplifier And a second down converter for downgrading the WLAN signal low noise amplified by the first low noise amplifier to a predetermined frequency and outputting the WLAN signal to the second coupling means. The wireless LAN amplifier of claim 12, wherein the second reverse WLAN amplifier And a first low noise amplifier configured to amplify the WLAN signal extracted by the sixth filter to a predetermined size. The method of claim 9, wherein the sensing means First sensing means for sensing an output level of the second forward mobile communication amplifier; And And a second sensing means for sensing an output level of the second forward WLAN amplifier.