JP2000049676A - Mobile communication system capable of effectively covering shadow area of base station and easily expanding its service area - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile communication system having an optical repeating system which uses a laser beam capable of easily expanding the service area of a base station. SOLUTION: This system is equipped with a remote transmitting and receiving device A which is installed in the service area 1 of the base station 10 and receives and converts an RF signal from the base station onto a laser beam signal, and transmits it to a shadow area 2 directly or by bypassing, and receives a laser beam signal from the shadow area 2 directly or by bypassing, converts it into an RF signal, and sends it to the base station 10 and a repeating device D which sends part of the laser beam signal received in the shadow area from the remote transmitting and receiving device A directly or by bypassing into an RF signal and sends it to a subscriber terminal, sends the remainder to the shadow area with a laser beam signal, and transmits an RF signal received from the subscriber terminal machine and a laser beam signal received from another shadow area to the remote transmitting and receiving device A directly or by bypassing with the laser beam signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system, and more particularly to a mobile communication system capable of effectively covering a shadow area inside and outside a base station and / or easily expanding a service area of the base station.

[0002]

BACKGROUND OF THE INVENTION Currently, analog and digital mobile phones,
Mobile communication services such as personal cellular communication (PCS) are provided.
PLMTS) will be serviced. By the way, in such a mobile communication service, an outdoor repeater or an optical repeater system has been used so far in order to eliminate the shaded area of the base station. When an outdoor repeater is used, the oscillation frequency of the repeater is caused by the fact that the input frequency and the output frequency of the repeater are the same when installed in the ground area.
In addition, an optical relay system using an optical antenna and an optical cable was developed by LG Telecom for the first time in the world. If an optical antenna that can provide equivalent coverage with the base station is installed anywhere within 20 km from the base station, shadows can be obtained. Although it is possible to solve the state where communication is disabled in the area, it is necessary to connect to the installed antenna with an optical cable, and such an optical cable connection can be leased even if the optical line is secured and paved. Due to its high cost, even at 450,000 won / km), there were many restrictions when installing it.
Therefore, in order to solve the problems related to the above-mentioned frequency and the problem of the high cost of securing the optical line, a point-to-point relay method using a laser beam, and a frequency band assigned by the relevant authority are used. , Frequency / allocation (Frequen
A cy / Assignment) scheme has been proposed. However, the point-to-point relay method using the laser beam described above only focuses on the concept of data transmission, that is, securing of a transmission path, and has a major disadvantage of using a laser beam. The F / A conversion method still has the problem of securing the distance, and the F / A conversion method only slightly converts the frequency within the allocated frequency band and still uses a high frequency region, so that the output fluctuates little. Therefore, there is a problem that the transmission distance cannot be improved, that is, the transmission distance cannot be increased. Accordingly, there has been a demand for a mobile communication system that can easily secure a visible distance, appropriately eliminate shadow areas inside and outside the base station, and easily expand the service area of the base station.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and the like and to provide a mobile communication system capable of meeting the above-mentioned demands. It is an object of the present invention to provide a mobile communication system having an optical repeater system using a laser beam capable of effectively covering the above. Another object of the present invention is to provide a mobile communication system having an optical repeater system using a laser beam capable of easily extending a service area of a base station. Still another object of the present invention is to provide a mobile communication system having an optical repeater system using a laser beam capable of easily extending a service area of a base station while effectively covering a shadow area inside and outside the base station. To provide. Still another object of the present invention is to provide a mobile communication system having an optical repeater system using a laser beam capable of easily securing a visible distance. Still another object of the present invention is to provide a mobile communication system having an optical repeater system using a laser beam capable of increasing a transmission distance.

[0004]

According to a first embodiment of the present invention, an RF signal receiving shadow area is provided inside or outside a service area, and the RF signal is transmitted. To transmit and receive, in a mobile communication system including at least one base station, installed in the service area of the base station, receiving the RF signal from the base station, after converting it to a laser beam signal, Remote transmitting / receiving means for transmitting to the shaded area, receiving the laser beam signal from the shaded area, converting this to the RF signal, and transmitting to the base station, installed in the shaded area, The laser beam signal received from is converted to the RF signal and transmitted to the subscriber terminal, the RF signal received from the subscriber terminal is converted to the laser beam signal Mobile communication system, comprising a laser cell means for transmitting to said remote transceiver means.

According to a second embodiment of the present invention, there is provided a mobile communication system including at least one base station for transmitting and receiving the RF signal, the RF signal receiving / shading area being located inside or outside the service area. Installed in the service area of the base station, receives the RF signal from the base station, converts it to a laser beam, transmits to the shaded area, and receives a laser beam signal from the shaded area And a remote transmitting / receiving means for converting the RF signal into the RF signal and transmitting the RF signal to the base station, at least a first path section and a second path section, and a first multiplexing apparatus installed in the shaded area. Path laser cell means, wherein the first path section converts the laser beam signal received from the remote transmitting / receiving means to the RF signal and transmits the RF signal to a subscriber terminal; The RF signal received from the terminal is converted to the laser beam signal and transmitted to the remote transceiver, the second path unit receives the laser beam signal received from the remote transceiver, A first multi-path laser cell means for transmitting the laser beam signal to another relay source and transmitting the laser beam signal received from the other relay source to the remote transmitting / receiving means with the laser beam signal; A mobile communication system is provided.

In the second embodiment according to the present invention, the other relay source may be another multipath laser cell means or a laser repeater means. According to a third embodiment of the present invention, in a mobile communication system including at least one base station having an RF signal reception shadow area inside or outside a service area and transmitting and receiving the RF signal, Installed in the service area of the station, receive the RF signal from the base station, convert it to a laser beam signal, transmit to the shaded area, receive the laser beam signal from the shaded area After converting this into the RF signal, the remote transmitting / receiving means for transmitting to the base station, the laser beam signal installed outside the shaded area and received from the remote transmitting / receiving means is converted into another laser beam signal. A first laser relay transmitting to the relay source and transmitting the laser beam signal received from the other relay source to the remote transmitting / receiving means as the laser beam signal; Mobile communication system, characterized in that it comprises a means.

In a third embodiment according to the present invention, the other relay source may be another laser repeater means,
At this time, the other laser repeater means may be a laser cell means or a multi-path laser cell means. In the third embodiment of the present invention, the other relay source may be a laser cell unit or a multi-path laser cell unit. In the above first to third embodiments, converting the laser beam signal to the RF signal may include up-converting the laser beam signal in frequency, and converting the RF signal to the laser beam signal. The conversion of
The method may include down-converting the frequency of the RF signal.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram showing an embodiment and the like of a mobile communication system according to the present invention. As shown in FIG. 1, when a shadow area (2) occurs inside or outside the service area (1) of the base station (10), a remote transmitting / receiving apparatus (30) described later with reference to FIG. ) And a laser cell (70) or a multi-path laser cell (110), which will be described later with reference to FIG. 3 or FIG. 5, is installed at point B, and a laser beam is emitted from point B to eliminate the shadow area. . If an obstacle occurs between the point A and the point B (when the visible distance cannot be secured or when the equipment reach distance is exceeded), a laser relay described later with reference to FIG. A vessel (170) is installed to relay the laser beam. This makes it possible to eliminate the shadow area of the base station and extend the service area of the base station by using the multipath. In addition, on a terrain with a sharp bend, a multi-path system is used to eliminate shadow areas. When used for service expansion in road areas such as expressways and national roads, as shown in FIG. 6, a plurality of multi-path laser cells shown in FIG. Expand the region.

Referring to FIGS. 1, 2 and 3, base station (1)
At the point A in FIG. 1 in the service area 0), the remote transmission / reception device 30 shown in FIG.
The first embodiment of the mobile communication system according to the present invention, in which the laser cell (70) of FIG. 3 for transmitting and receiving to and from the subscriber terminal is installed at the point B of FIG. 1 in the shaded area (2) of (10). An example will be described. The mobile communication system according to the first embodiment described above includes an RF signal reception shadow area inside or outside the service area (1).
(2) and includes at least one base station (10) for transmitting and receiving the RF signal. First, the forward link of the first embodiment will be described.
RF signal received from the base station (10) via the antenna (32) and the receiver of the duplexer (34) is input to the low noise amplifier (40). Is done.
The low-noise amplifier (40) amplifies the received RF signal while suppressing the amplification of noise included in the received RF signal. The difference between the output of the low noise amplifier (40) and the reference frequency is determined by the frequency down converter (42), and the bandpass filter is used.
At (44), unnecessary waves included in the output of the frequency down converter (42) are removed, and the signal from which unnecessary waves have been removed is amplified by the preamplifier (46). Using the output of the preamplifier (46), the laser bias unit (48) drives the laser diode (50), and the driving output is transmitted via the lens (52) to the laser cell (70) in the shaded area. Sent to In the laser cell (70), the signal transmitted through the lens (52) of the above-described remote transmitting / receiving device is received by the lens (72), and the signal received by the lens (72) is received by the photodetector (74). After the conversion into an electric signal, the output of the photodetector (74) is converted to an amplifiable level by the signal detection unit (76), and an unnecessary wave is removed by the band-pass filter (78). The output of the band-pass filter (78) is amplified by the low-noise amplifier (80) while suppressing the noise amplification. The output of the low-noise amplifier (80) is further converted to an RF signal by the frequency up-converter (82) using the reference frequency, and then unnecessary waves are removed by the band-pass filter (84). As described above, the signal from which unnecessary waves have been removed is amplified by the power amplifier (86), and then transmitted to the subscriber terminal via the transmitting unit of the duplex (88) and the antenna (90).

Next, the reverse link of the first embodiment will be described. A laser cell (70) receives an RF signal from a subscriber terminal by an antenna (90) and a receiving unit of a duplex (88). . The low noise amplifier (92) amplifies the received RF signal while suppressing the amplification of noise included in the received RF signal. Then, the difference between the output of the low-noise amplifier (92) and the reference frequency is obtained by the frequency down converter (94), and the unnecessary wave included in the output of the frequency down converter (94) is obtained by the band pass filter (96). Is removed, and the signal from which unnecessary waves have been removed is amplified by the preamplifier (98). Using the output of the preamplifier (98), the laser bias unit (100) drives the laser diode (102), and the drive output is the lens (104)
To the remote transmitting / receiving device (30) in the service area (1) of the base station.

In the remote transmitting / receiving device (30), the signal transmitted through the lens (104) of the laser cell (70) of FIG. 3 is received by the lens (54), and is received by the lens (54). After the signal is converted to an electric signal by the photodetector (56), the output of the photodetector (56) is converted to an amplifiable level by the signal detection unit (58). Thereafter, the output of the signal detection unit (58) is amplified by the low noise amplifier (60) while suppressing the noise amplification degree, and an unnecessary wave is removed by the band-pass filter (62).
After the output of this band-pass filter (62) is further converted into an RF signal by the frequency up-converter (64) using the reference frequency, the converted RF signal is amplified by the power amplifier (66). Duplicate the amplified RF signal (3
4) Base station (10) with RF signal via transmitter and antenna (32)
Send to

Next, referring to FIGS. 1, 2 and 5, a remote transmitting / receiving apparatus (FIG. 2) for securing a visible distance is provided at a point A in FIG. 1 in the service area of the base station (10). 30) is installed,
At the point B in FIG. 1 in the shaded area (2) of the base station, the multipath laser cell (FIG. 5) for realizing the relay with the subscriber terminal and the relay source for the service in the other shaded area ( 11
A second embodiment of the mobile communication system according to the present invention in which (0) is installed will be described. The mobile communication system according to the second embodiment has an RF signal reception shadow area (2) inside or outside the service area (1), and transmits and receives the RF signal. At least one base station (10) including.

First, the forward link of the second embodiment will be described. The remote transmitting / receiving apparatus (30) is installed in the service area (1) of the base station (10), and the antenna is transmitted from the base station (10) to the antenna.
The RF signal received via (32) and the receiving section of the duplexer (34) is input to the low noise amplifier (40). The low-noise amplifier (40) amplifies the received RF signal while suppressing the amplification of noise included in the received RF signal. The frequency down converter (42) calculates the difference between the output of the low noise amplifier (40) and the reference frequency, and the bandpass filter (44) removes unnecessary waves contained in the output of the frequency down converter (42). Then, the signal from which unnecessary waves have been removed is amplified by the preamplifier (46). Using the output of the preamplifier (46), the laser bias unit (48) drives the laser diode (50),
This drive output is transmitted via a lens (52) to a multipath laser cell (110) in the shaded area.

In the multi-path laser cell (110), the signal transmitted through the lens (52) of the remote transceiver is received by the lens (112), and the signal received by the lens (112) is detected by light. After converting to an electric signal by the device (114),
The output of the photodetector (114) is converted to a level that can be amplified by the signal detection unit (116), and unnecessary waves are removed by the band-pass filter (118). The output of the band pass filter (118) is amplified by the low noise amplifier (120) while suppressing the noise amplification. The output of this low noise amplifier (120) is
Thus, the output for the service to the shadow area (2) and the relay output to the relay source for the service to the other shadow area are divided. The output for the service of the divider (122) is further converted to an RF signal by the frequency up-converter (124) using the reference frequency, and then the band-pass filter (1).
26) eliminates unnecessary waves. After amplifying the signal from which unnecessary waves have been removed by the power amplifier (128),
The signal is transmitted to the subscriber terminal via the transmitting unit of the duplex unit (130) and the antenna (132). The relay output to the relay source for service to the other shaded areas in the distributor (122) is supplied to a laser bias unit (134), where the laser output is performed using the relay output. It drives a diode (136), the drive output of which is transmitted via a lens (138) to a relay source for service to other shadow areas. Next, the reverse link of the second embodiment will be described. On the other hand, the multipath laser cell (110) transmits the RF signal from the subscriber terminal to the antenna (132) in a duplex manner.
It is received by the receiving unit of (130). The low noise amplifier (140)
The received RF signal is amplified while suppressing the degree of amplification of noise included in the received RF signal. Thereafter, the difference between the output of the low-noise amplifier (140) and the reference frequency is obtained by the frequency down converter (142), and the unnecessary wave included in the output of the frequency down converter (142) is obtained by the band-pass filter (144). To remove
The signal from which unnecessary waves have been removed is amplified by the preamplifier (146). The output of this preamplifier (146) is supplied to one input terminal of a combiner.

On the other hand, the multipath laser cell (110) receives the laser beam signal transmitted from the relay source for service to another shadow area by the lens (156), and receives the laser beam signal by the lens (156). After the converted signal is converted to an electrical signal by the photodetector (158), the output of the photodetector (158) is converted to an amplifiable level by the signal detection unit (160), and the unnecessary Is removed. The output of the band pass filter (162) is amplified by the low noise amplifier (164) while suppressing the noise amplification. This low noise amplifier (1
The output of (64) is input to another input terminal of the coupler (148). The combiner (148) combines the signal input from the preamplifier (146) in connection with the service function and the signal input from the low noise amplifier (164) in connection with the relay function. The signal applied by the coupler (148) is supplied to a laser bias section (150), and the laser bias section (150) uses the output of the coupler to drive a laser diode (152). Is transmitted to the lens (54) of the remote transmission / reception device (30) of FIG. 2 located in the service area (1) via the lens (154). In the remote transmitting / receiving device (30), the signal transmitted through the lens (154) of the multi-path laser cell (110) of FIG. 5 is received by the lens (54), and the signal received by the lens (54) is received. Is converted into an electric signal by the photodetector (56), and then the output of the photodetector (54) is converted to an amplifiable level by the signal detection unit (58). Thereafter, the output of the signal detector (58) is amplified by the low-noise amplifier (60) while suppressing the noise amplification degree, and an unnecessary wave is removed by the band-pass filter (62).
After the output of this band-pass filter (62) is further converted to an RF signal by the frequency upward converter (64) using the reference frequency, the RF signal is amplified by the power amplifier (66), and the amplified RF signal is amplified. The RF signal is transmitted to the base station (10) as an RF signal via the transmitting section of the duplex (34) and the antenna (32). In the above-described second embodiment, the relay source for the service to the other shaded area is a multi-path laser cell of the same type as the multi-path laser cell 110 shown in FIG. 5 or described later. The laser repeater (17) shown in FIG.
0).

Next, if an obstacle (when it is impossible to secure the visible distance or exceeds the equipment reach distance) occurs between the point A and the point B in FIG. Third Embodiment A third embodiment of the mobile communication system according to the present invention, in which a laser repeater (170) described later is installed and a laser beam is relayed, as illustrated in FIG. 4, will be described. In the third embodiment, the remote transceiver 30 shown in FIG. 2 for securing a visible distance is installed at the point A in FIG. 1 in the service area of the base station 10 and the shaded area 2 The laser cell (70) of FIG. 3 or the multi-path laser cell (110) of FIG. 5 which can be located at the point B of FIG. 1 is installed, but the laser beam signal transmitted from the remote transmitting / receiving device (30) is provided. If the laser cell (70) or the multi-path laser cell (110) does not arrive due to an obstacle, a laser repeater (170) is installed at the point C in FIG. To relay the signal from the to the laser cell (70) or the multi-path laser cell (110), or to the point C and D
A laser repeater (170) is installed at both points, and the laser repeater (170) at the point C receives the laser beam signal from the remote transceiver (30), and further converts the received laser beam signal to the point D. After relaying to the laser repeater (170), the laser repeater (170) at the point D further relays the laser beam signal to the laser cell (70) or the multi-path laser cell (110). In the mobile communication system according to the third embodiment, the service area
At least one base station having an RF signal reception shadow area (2) inside or outside (1), and transmitting and receiving this RF signal
(10) is included.

First, the forward link of the third embodiment will be described. The remote transmitting / receiving device (30) is installed in the service area (1) of the base station (10), and the antenna is transmitted from the base station (10) to the antenna.
The RF signal received via (32) and the receiving section of the duplexer (34) is input to the low noise amplifier (40). The low-noise amplifier (40) amplifies the received RF signal while suppressing the amplification of noise included in the received RF signal. The difference between the output of the low-noise amplifier (40) and the reference frequency is obtained by the frequency down converter (42), and unnecessary waves included in the output of the frequency down converter (42) are removed by the band pass filter (44). Then, the signal from which unnecessary waves have been removed is amplified by the preamplifier (46). Using the output of the preamplifier (46), the laser bias unit (48) drives the laser diode (50), and this drive output is output via the lens (52) to FIG. It transmits to the illustrated laser repeater (170).

In the laser repeater (170) of FIG. 4, the signal transmitted through the lens (52) of the remote transmitting / receiving device (30) of FIG. 2 is received by the lens (172). After converting the signal received by the photodetector (174) into an electrical signal, the signal detector (176) converts the output of the photodetector (174) to an amplifiable level, and the bandpass filter (1).
Unnecessary waves are removed by (78). Bandpass filter (178)
Is amplified by the low noise amplifier (180) while suppressing the noise amplification degree. Using the output of the low noise amplifier (180), the laser bias section (182)
4), and this drive output is output via a lens (184)
The laser beam signal of the laser cell (70) of FIG. 3 or the multi-path laser cell (110) of FIG. 5 in the shaded area (2) is transmitted to the receiving lens, or when there is an obstacle, another laser repeater is used. Is transmitted to the receiving lens of the laser beam.

Next, the reverse link of the third embodiment will be described. The laser cell (7) shown in FIG.
0) or the laser beam signal transmitted from the laser beam signal transmission lens of the multi-path laser cell (110) of FIG. 5 or the laser beam signal transmitted from the laser beam signal transmission lens of another laser repeater is received by the lens (188); After the signal received by the lens (188) is converted to an electric signal by the photodetector (190), the output of the photodetector (190) is converted to a level that can be amplified by the signal detection unit (192), and band-passed. filter
Unnecessary waves are removed by (194). The preamplifier (196) amplifies the output of the band pass filter (194). Using the output of the preamplifier (196), the laser bias unit (198) drives the laser diode (200), and the driving output is
The data is transmitted via the lens (202) to the receiving lens (54) of the remote transmitting / receiving apparatus in FIG. 2 located in the service area (1).

In the remote transmission / reception device (30), the signal transmitted through the transmission lens (202) of the laser repeater (170) shown in FIG. 4 is received by the lens (54), and is received by the lens (54). After converting the received signal into an electrical signal by the photodetector (56), the signal detector (58) outputs the output of the photodetector (54),
Convert to a level that can be amplified. Then the low noise amplifier
According to (60), the output of the signal detection unit (58) is amplified while suppressing the noise amplification degree, and an unnecessary wave is removed by the band-pass filter (62). The output of this bandpass filter (62)
After using the reference frequency to further convert the RF signal into an RF signal by the frequency up-converter (64), the RF signal is amplified by the power amplifier (86), and the amplified RF signal is transmitted to the transmission unit of the duplex (34). And base station with RF signal via antenna (32)
Send to (10).

Next, an embodiment of the second embodiment of the mobile communication system according to the present invention will be described with reference to FIG. Second
In the embodiment of the embodiment, the remote transceiver (30) of FIG. 2 for securing a visible distance is installed at the point A in FIG. 1 in the service area of the base station (10), and the shaded area ( The multi-path laser cell (110) of FIG. 5 is installed at the point B in FIG. 1 of FIG. 1 to realize the service with the subscriber terminal and the relay with the relay source for the service in other shaded areas. In the second embodiment, in a road area such as a highway, a national road, etc., a plurality of shaded areas (2A, 2B, 2C,
……, 2N), and continuously into each shaded area
Multi-path laser cells (110A, 110B, 110C, ...
..), Where the visible distance is easily secured from the service area to the shaded area, and the service area of the base station (10) is easily extended along the road.

[0022]

As described above, according to the mobile communication system of the present invention, as compared with the conventional system using a laser beam, the visible distance from the service area to the shadow area can be easily ensured. Can be effectively covered, the service area of the base station can be easily extended, and the transmission distance of the RF signal can be made longer.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment and the like of a mobile communication system according to the present invention.

FIG. 2 is a block diagram showing a remote transmitting / receiving apparatus used in the mobile communication system according to the present invention.

FIG. 3 is a block diagram showing a laser cell used in the mobile communication system according to the present invention.

FIG. 4 is a block diagram showing a laser repeater used in the mobile communication system according to the present invention.

FIG. 5 is a block diagram showing a multipath laser cell used in the mobile communication system according to the present invention.

FIG. 6 is an exemplary diagram showing an example of extending a service area of a base station using the configuration of the second embodiment of the present invention.

[Explanation of symbols]

 1 base station service area 2 shaded area 10 base station 30 remote transceiver 70 laser cell 110 multi-path laser cell 170 laser repeater

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Li Dong-ho South Korea Gyeonggi-do Gong-dong, Seongnam-gu, 550, Ginkgo 2-dong, Sumigong Apartment 116 No. 1207 Far East Apartment 102 1703

Claims (17)

[Claims] 1. A mobile communication system including at least one base station having an RF signal reception shadow area inside or outside a service area and transmitting and receiving the RF signal, wherein: Installed, receiving the RF signal from the base station, converting it to a laser beam signal, transmitting to the shaded area, receiving the laser beam signal from the shaded area, and converting it to the RF signal After the conversion, the remote transmitting / receiving means for transmitting to the base station, the laser beam signal installed in the shaded area and received from the remote transmitting / receiving means is converted to the RF signal and transmitted to the subscriber terminal. Converting the RF signal received from the subscriber terminal into the laser beam signal and transmitting the laser beam signal to the remote transmitting / receiving means. Dynamic communication system. 2. The method according to claim 1, wherein converting the RF signal into the laser beam signal in the remote transmitting / receiving means includes down-converting the RF signal in frequency, and converting the laser beam signal in the remote transmitting / receiving means. The conversion to the RF signal includes up-converting the laser beam signal, and the conversion of the laser beam signal into the RF signal in the laser cell means includes up-converting the laser beam signal. The mobile communication system, wherein the conversion of the RF signal to the laser beam signal in the laser cell means includes down-conversion of the RF signal. 3. A mobile communication system including at least one base station that has an RF signal reception shadow area inside or outside a service area and transmits and receives the RF signal, wherein the base station has a service area within the service area. Installed, receiving the RF signal from the base station, converting it to a laser beam signal, transmitting to the shaded area, receiving the laser beam signal from the shaded area, and converting it to the RF signal Remote transceiving means for transmitting to the base station after the conversion, comprising: at least a first path part and a second path part; a first multi-path laser cell means installed in the shaded area, The first path unit converts the laser beam signal received from the remote transmitting / receiving means to the RF signal and transmits the RF signal to a subscriber terminal, and further comprises the RF signal received from the subscriber terminal. The laser beam signal is converted into the laser beam signal and transmitted to the remote transmitting / receiving means, and the second path unit transmits the laser beam signal received from the remote transmitting / receiving means to another relay source with the laser beam signal. And a first multi-path laser cell means for transmitting a laser beam signal received from said another relay source to said remote transmitting / receiving means by said laser beam. 4. The method according to claim 3, wherein the conversion of the RF signal to the laser beam signal in the remote transmitting / receiving means includes down-converting the RF signal in frequency. The conversion to the RF signal includes up-converting the laser beam signal, and the conversion of the laser beam signal to the RF signal in the multi-path laser cell means up-converts the laser beam signal. The mobile communication system, wherein the conversion of the RF signal to the laser beam signal in the multipath laser cell means includes down-converting the RF signal. 5. The method according to claim 3, wherein the other relay source comprises:
A second multi-path laser cell means comprising at least a third path part and a fourth path part and installed in another shaded area of the base station, wherein the third path part is the third path part. 1
Converting the laser beam signal received from the second path section of the multipath laser cell into the RF signal and transmitting the RF signal to the subscriber terminal, and converting the RF signal received from the subscriber terminal to the The laser beam is converted into a laser beam signal and transmitted to the second path section of the first multi-path laser cell means. The fourth path section is connected to a second path of the first multi-path laser cell means. Transmitting the laser beam signal received from the section to the other relay source with the laser beam signal, and transmitting the laser beam signal received from the another relay source with the laser beam signal to the first multiplex. A mobile communication system characterized by a second multi-path laser cell means for transmitting to a second path part of the path laser cell means. 6. The method according to claim 3, wherein the other relay source comprises:
Transmitting the laser beam signal received from the second path section of the first multi-path laser cell means to the other relay source with the laser beam signal, and receiving the laser beam from the other relay source; A mobile communication system, comprising: a laser repeater means for transmitting a beam signal as the laser beam signal to a second path section of the first multi-path laser cell means. 7. A mobile communication system including an at least one base station having an RF signal reception shadow area inside or outside a service area and transmitting and receiving the RF signal, wherein: Installed, receiving the RF signal from the base station, converting it to a laser beam signal, transmitting to the shaded area, receiving the laser beam signal from the shaded area, and converting it to the RF signal After the conversion, remote transmitting and receiving means for transmitting to the base station, installed outside the shadow area, the laser beam signal received from the remote transmitting and receiving means, transmitting the laser beam signal to another relay source, the A first laser repeater means for transmitting the laser beam signal received from another relay source to the remote transmitting / receiving means by the laser beam signal; Mobile communication system according to claim. 8. The method according to claim 7, wherein the other relay source comprises:
A mobile communication system located in the shaded area. 9. The method according to claim 7, wherein the other relay source comprises:
A mobile communication system which is outside the shadow area. 10. The method according to claim 7, wherein
In the paragraph, the conversion of the RF signal into the laser beam signal in the remote transmitting / receiving means includes down-converting the RF signal in frequency, wherein the conversion of the laser beam signal into the RF signal in the remote transmitting / receiving means is A mobile communication system, comprising: converting the laser beam signal upward in frequency. 11. The apparatus of claim 8, wherein the other relay source converts the laser beam signal received from the first laser repeater means to the RF signal and transmits the RF signal to a subscriber terminal. A mobile communication system comprising: a laser cell unit that converts the RF signal received from a subscriber terminal into the laser beam signal and transmits the laser beam signal to the first laser repeater unit. 12. The multi-path laser cell unit according to claim 8, wherein the other relay source includes at least a first path unit and a second path unit, and is a multi-path laser cell unit installed in the shaded area. A first path section for transmitting the laser beam signal received from the first laser repeater means to the RF signal;
And converts the RF signal received from the subscriber terminal into the laser beam signal and transmits the laser beam signal to the first laser repeater means. Transmitting the laser beam signal received from the first laser repeater means to the other relay source located in another shaded area by the laser beam signal, and And a multi-path laser cell means for transmitting the laser beam signal received from the first laser beam signal to the first laser repeater means. 13. The repeater according to claim 9, wherein the other relay source transmits the laser beam signal received from the first laser repeater means to the other relay source with the laser beam signal. And a second laser repeater means for transmitting the laser beam signal received from another relay source to the first laser repeater means as the laser beam signal. 14. Inside or outside the service area, at least one base station having at least a first shadow area and an RF signal reception multiple shadow area including a second shadow area, and transmitting and receiving the RF signal. In the mobile communication system including, installed in the service area of the base station, receive the RF signal from the base station, convert it to a laser beam signal, and then transmit to the first shadow area, A remote transmitting / receiving means for receiving a laser beam signal from the first shaded area, converting it to the RF signal, and transmitting the RF signal to the base station; and distributing a laser beam signal output received from the remote transmitting / receiving means. A part of the first shadow area is transmitted to the subscriber terminal located in the first shadow area by an RF signal, and another part is transmitted to the second shadow area by a laser beam signal. And a first relay means for transmitting an RF signal received from the subscriber terminal located in the second area together with a laser beam signal received from the second shaded area to the remote transmitting / receiving means as a laser beam signal. A mobile communication system characterized by the above-mentioned. 15. The mobile communication system according to claim 14, wherein the plurality of shaded areas include a third shaded area to an n-th shaded area, and wherein the mobile communication system includes a laser beam signal received from the first relay unit. Distributing the power, transmitting a part of the power to a subscriber terminal located in the second shadow area by an RF signal, transmitting another part by a laser beam signal to the third shadow area, A second relay for transmitting an RF signal received from a subscriber terminal located in the second shaded area together with the laser beam signal received from the third shaded area to the remote transmitting / receiving means as a laser beam signal; Means, transmitting the laser beam signal received from the (n-1) th relay means as an RF signal to a subscriber terminal located in the n-th shaded area, and receiving the RF signal from the subscriber terminal located in the n-th shaded area. The obtained RF signal is Mobile communication system, characterized by further comprising a relay terminal means for transmitting a laser beam signal to the unit. 16. A mobile communication system including at least one base station having an RF signal reception shadow area inside or outside a service area and transmitting and receiving an RF signal, wherein the mobile communication system is installed in the service area of the base station, After receiving the RF signal from the base station and converting it to a laser beam signal,
Directly or by-passing to the shaded area, transmitting the laser beam signal directly or by-passing from the shaded area, and transmitting it to RF
After converting to a signal, the remote transmitting and receiving means for transmitting to the base station, the laser beam signal received directly or by-passed from the remote transmitting and receiving means in the shaded area is converted to an RF signal and transmitted to the subscriber terminal, A mobile communication system comprising means for converting an RF signal from a subscriber terminal into a laser beam signal and transmitting the laser beam signal to a remote transmitting / receiving means directly or by-passing the laser beam signal. 17. A mobile communication system including at least one base station having an RF signal reception shadow area inside or outside a service area and transmitting and receiving an RF signal, wherein the mobile communication system is installed in the service area of the base station. After receiving the RF signal from the base station and converting it to a laser beam signal,
Directly or by-passing to the shaded area, transmitting the laser beam signal directly or by-passing from the shaded area, and transmitting it to RF
Remote transmission / reception means for transmitting the signal to the base station, and converting a part of the laser beam signal received directly or by-passed from the remote transmission / reception means to the subscriber terminal in the shaded area to the subscriber terminal Transmit, the other part is transmitted by laser beam signal to other shadow areas, and the RF signal received from the subscriber terminal and the laser beam signal received from other shadow areas, directly or by laser beam signal A mobile communication system comprising: relay means for transmitting to a remote transmitting / receiving means by bypassing.