KR100928626B1 - Expansion system of optical repeater for wireless communication - Google Patents

Abstract

The present invention enables the further expansion of the optical repeater by using an additional expansion optical repeater having a simple configuration, and by connecting the main optical repeater and the additional expansion optical repeater that is further extended through a single RF cable, a significant cost It provides an extension system of the optical repeater for wireless communication, which enables saving and saving of installation space.

To this end, the present invention receives the forward signal from the base station and radiates to its own installation area and transmits it to an additionally extended repeater through a single common cable, and further received from the additional extended repeater through a single common cable. A main common repeater for transmitting the reverse signal and the reverse diversity signal from the extended area to the base station in combination with the reverse signal from the installation area and the reverse diversity signal, and the base station forward signal from the main repeater to a single common cable. Received through the signal compensation and high-power amplification with the rated capacity to radiate to the installation area, filtering and signal compensation of the reverse signal and reverse diversity signal received from the installation area of the main repeater through a single common cable Before The transmission is characterized in that it comprises an additional expansion repeater, and a single common cable connecting the main repeater and the further expansion repeater to form a signal path of the forward signal, the reverse signal, the reverse diversity signal.

Description

Expandable System for Mobile Communication Optice Repeater

The present invention provides a wireless communication optical link that can be connected to the additional repeater of the compact (Compact) configuration in the expansion of the repeater from the main repeater to the other shaded area in the wireless communication optical repeater to reduce the cost and installation space A repeater expansion system.

In general, a mobile communication network system is a main device that performs switching for voice calls and data transmission, and is mainly a mobile communication switch, and a wireless base station in which a plurality of areas are distributed by dividing the area controlled by the corresponding mobile communication switch into a plurality of sectors. And a base station controller which bundles each base station by region and manages a plurality of base stations, respectively.

Wireless base stations of mobile communication network systems are installed in each area so that subscribers of mobile communication devices can communicate smoothly in the coverage of their area. However, their base area has many skyscrapers, high-rise apartments, etc. In the case of an area or an apartment complex area, there are shaded areas where smooth communication cannot be performed due to obstacles such as buildings.

In order to eliminate such shaded areas, recently, an optical repeater for relaying a signal path between a mobile communication terminal and a wireless base station through an optical cable has been developed and widely used on the shaded area side.

Meanwhile, in such wireless communication optical repeaters, new shaded areas often occur according to changes in the environment and facilities of the installation area.In order to cover these new shaded areas, an optical repeater installed as a main repeater is used as the main repeater. A separate additional repeater with the same device configuration can be extended and connected via an optical cable.

That is, FIG. 1 is a diagram illustrating an expansion configuration using a main repeater of a conventional general cascade method.

As shown in FIG. 1, the main repeater 10 connected to the wireless base station side via an optical cable transmits a forward signal FWD from the base station through an antenna and a reverse signal (RVS) from the subscriber side mobile communication terminal. ) And a reverse diversity signal (RVS_Div) is received from the antenna to be processed and transmitted to the base station through the optical cable.

In this state, when a new shaded area is generated and an additional relay device needs to be expanded, a main repeater 20 having the same device configuration and the same specification as the corresponding main repeater 10 is installed in the shaded area as shown in the figure. In addition, the optical splitter 30 allows the relays to be connected 1: 1 by a cascade method through an optical cable.

However, in the case of the expansion configuration of the optical repeater through the conventional cascade method, when the repeater device needs to be extended, the repeater having the same device configuration as the main repeater must be expanded, so that the equipment cost of the initial main repeater is the same. In addition to the disadvantage of having to spend money, more repeaters of the same size need to be installed, and thus more installation space is required, and a problem arises in that the cost is increased as each relay is connected through an expensive optical cable. .

Therefore, the present invention has been made to solve the above-described problems, the object of which is to further expand the optical repeater by using an additional expansion optical repeater having a simple configuration is possible to reduce the cost and installation space It is to provide an extension system of the optical repeater for wireless communication.

Another object of the present invention is to provide an extension system of an optical repeater for wireless communication, which enables a significant cost reduction by connecting between the main optical repeater and an additional expansion optical repeater that is further extended through a single RF cable.

In order to achieve the above object, according to the system of the present invention, it receives the forward signal from the base station and radiates to its own installation area and transmits it to an additionally extended repeater through a single common cable, and transmits a single common cable. A main repeater for transmitting the reverse signal and the reverse diversity signal from the additional extended area received from the additionally extended repeater to the base station in combination with the reverse signal and the reverse diversity signal from its own installation area, and the main Receives base station forward signals from repeaters through a single common cable and emits high power amplification with signal compensation and rated capacity to their installation area, filtering and signaling reverse and reverse diversity signals received from their installation area Single by reward An additional extension repeater for transmitting to the main repeater through a common cable and a single common cable connecting the main repeater and the additional extension repeater to form a signal path of a forward signal, a reverse signal, and a reverse diversity signal. Provides an extension system of the optical repeater for wireless communication, characterized in that configured to include.

In addition, the main repeater according to the present invention is connected to a specific additional extension repeater through a single common RF cable, and the forward optical signal from the base station to the photoelectric conversion of the forward RF signal to distribute to a plurality of paths, Compensating the forward RF signal of one path and transmitting the signal to the additional extension repeater through the single common RF cable, and receiving the reverse RF signal from the additional extension repeater received through the single common RF cable. Coupling with at least one reverse RF signal received from the installation area of the main repeater and converting the optical signal into a reverse optical signal and transmitting it to a base station, and converting the reverse RF signal into an intermediate frequency signal or an intermediate frequency signal into an RF signal. Designate and output the signal path of local frequency signal for It characterized by configured to exchange control information signals for controlling communication.

Further, the repeater for further expansion according to the present invention is connected to the main repeater via a single common RF cable, and the base station forward RF signal from the main repeater with high power amplification with signal compensation and rated capacity to its installation area. Radiating, and filtering and signal compensating a reverse RF signal and a reverse diversity signal received from its own installation area, respectively, and transmitting the same to the main repeater by converting the reverse diversity signal into an intermediate frequency signal. It transmits via a cable, characterized in that configured to exchange the control information signal for mutual control communication with the main repeater through the single common RF cable.

According to the present invention as described above, in case of extending the other repeater to the shadow area by using the wireless communication repeater as the main repeater, the signal compensation function, the high output power amplification function, the bandpass filtering of the reverse signal and the reverse diversity signal By providing an additional extended repeater with a simple configuration that implements the intermediate frequency conversion function, the main repeater and the additional extended repeater are connected by a single RF cable so that forward and reverse signals can be transmitted and received through a single RF cable. Therefore, it is possible to prepare additional expansion repeaters of simple components, which can save considerable cost compared to the existing expansion method of the same main repeater, and the miniaturization of the additional expansion repeaters due to the simple configuration reduces the installation space. It is possible to save Only use the low-cost RF cable to fiber optic cable instead of gyeokdae so has an excellent effect that the possible additional costs resulting therefrom.

Hereinafter, an embodiment of the present invention configured as described above will be described in detail with reference to the accompanying drawings.

That is, Figure 2 is a diagram showing the overall configuration of the expansion system of the optical repeater for wireless communication according to an embodiment of the present invention.

As shown in FIG. 2, the system for expanding an optical repeater for a wireless communication according to an embodiment of the present invention includes a main repeater 100 connected to a base station and a predetermined shadow area that the main repeater 100 cannot cover. Additional expansion repeater 200 is further extended to cover the connection, a single connecting the main repeater 100 and the additional expansion repeater 200 for further expansion of the repeater from the main repeater 100 It is composed of a common RF cable (300).

The main optical repeater 100 is connected to the base station side via an optical cable, and further connected to the repeater for expansion 200 further extended to the shadow area through a single common RF cable 300, the single The forward signal from the base station is distributed through the common RF cable 300 to be transmitted to the additional extension repeater 200, and the additional extension repeater 200 is relayed from the shaded area through the mobile communication terminal. The reverse signal is converted into an optical signal and transmitted to the base station.

Here, the main repeater 100 is an optical module 102, a forward RF module 104, a reverse RF module 106, a 3-way divider 108, a low noise amplifier. Low Noise Amplifier (LNA) (110, 112, 118), Band Pass Filter (BPF) (114, 116), Attenuator (120), Diplexer (122), Local Signal Generator ( 124), coupler 126, 2-way divider (128,130), bandpass filters 132, 134, couplers (Coupler) 136, 140, mixers 138, modems ( 142, a main control unit (MCU) 144.

The optical module 102 transmits and receives a forward optical signal from a base station and a reverse optical signal from a mobile communication terminal through an optical cable connected to the base station.

The forward RF module 104 photoelectrically converts a forward optical signal from the optical module 102 into a forward RF signal and outputs the forward RF signal.

The reverse RF module 106 is a reverse RF signal and a reverse diversity signal from the mobile terminal of the corresponding main repeater 100 coupled and introduced through the couplers 136 and 140, and the additional extension repeater 200 Each of the uplink RF signal and the uplink diversity signal from the mobile communication terminal is converted into an uplink optical signal and output to the uplink optical signal.

The three-way divider 108 forwards the forward RF signal from the forward RF module 104 to the repeater 200 for further expansion via two paths and RF cables radiated through the SVC antenna of the corresponding main repeater. The signal is divided and output in three directions including one path to be transmitted.

Each of the low noise amplifiers 110 and 112 performs low noise amplification on the two-path forward RF signals distributed from the three-way divider 108, and outputs each of the band pass filters 114 and 116 to each of the low noise amplifiers 110 and 112. The low noise amplified two paths of the signal are filtered by the required band so that each of the forward RF signals FWD_0 and FWD_1 can be radiated through the SVC antenna.

The low noise amplifier 118 low noise amplifies the forward RF signal along the path of the further expansion repeater 200 distributed from the three-way divider 108, and the attenuator 120 low noise from the low noise amplifier 118. Signal attenuation of the amplified forward RF signal compensates for the signal level of the RF signal.

The diplexer 122 is connected to the three-way divider 108 through the attenuator 120 and the low noise amplifier 118, and is connected to the local signal generator 124, the coupler 136 With the mixers 138 connected to each other, a single common cable 300 is connected to the additional extension repeater 200 so as to enable transmission and reception of forward / reverse RF signals and diversity signals in the form of intermediate frequencies. And outputs a signal path for the forward RF signal, the reverse RF signal, and the reverse diversity signal of the intermediate frequency in a designated path, and outputs a local signal from the local signal generator 124 to the mixer 138. In addition, it is to be transmitted to the additional extension repeater 200 through a single common RF cable (300).

Here, the diplexer 122 serves to pass the frequency of the desired band by separating the transmission and reception frequency, and the phase dielectric characteristics of the microwave dielectric that performs a radio wave filtering function to filter out only necessary radio waves and remove unnecessary ones. It consists of used bandpass filter.

The local signal generator 124 allows the additional extension repeater 200 to convert the reverse diversity signal into an intermediate frequency signal, and the mixer 138 converts the intermediate frequency signal into an RF reverse diver. Generate a local frequency signal for conversion to a city signal.

The coupler 126 receives a forward RF signal from the diplexer 122 and a local frequency signal, and reverse RF from the additional extension repeater 200 through the single common RF cable 126. A signal, a reverse diversity signal and a control information signal in the form of an intermediate frequency signal are received, and the control information signal is received from the modem 142 and is coupled and output.

Each of the two-way dividers 128 and 130 has two paths of reverse RF signals (RVS_0 and RVS_1) and two paths of reverse diversity from the mobile communication terminal near the corresponding main repeater 100 received through the SVC antenna. The signals RVS_Div_0 and RVS_Div_1 are respectively signal-coupled and output.

Each of the bandpass filters 132 and 134 removes unwanted waves from the reverse RF signals and the reverse diversity signals from the two-way dividers 124 and 126 and performs bandpass filtering on only necessary bands.

The coupler 136 is a reverse RF signal from the repeater 200 for further expansion from the diplexer 122 and the corresponding main repeater 100 side band-pass filtered through the bandpass filter 132. The reverse RF signal is coupled and output to the reverse RF module 106.

The mixer 138 receives the reverse diversity signal in the form of an intermediate frequency signal from the diplexer 122 and synthesizes the signal with the local frequency signal from the local signal generator 124 to reverse the diversity in the form of an RF signal. The signal is converted into a signal and output to the coupler 140.

The coupler 140 is a reverse diversity signal of the main repeater 100 side bandpass filtered through the bandpass filter 134 and the addition of the intermediate frequency signal converted from the mixer 138 into an RF signal. The reverse diversity signal from the extension repeater 200 is coupled and output to the reverse RF module 106.

The modem 142 is a main control unit of the corresponding main repeater 100 through communication with the modem 228 of the additional extension repeater 200 via the coupler 126 and a single common RF cable 300 Signal transmission and reception for control communication between the main control unit 230 of the repeater 200 for the additional extension (144).

The main control unit 144 checks the state of the corresponding main repeater 100, generates control information accordingly, and transmits the control information to the additional expansion repeater 200 through the modem 142. The control information is received from the main control unit 230 of the 200 and the control for checking the state between the additional expansion repeater 200 and the main repeater 100 is performed.

In one embodiment of the present invention, the additional extension repeater 200 is fixedly installed in a shadow area that the main repeater 100 can not cover, the main repeater 100 and a single common RF cable 300 Receive the forward RF signal from the base station is distributed and transmitted through the main repeater 100, and transmitted to the mobile communication terminal located in the corresponding shaded area through signal compensation and power amplification by the rated capacity. In addition, the reverse RF signal (RVS) and the reverse diversity signal (RVS_Div) from the mobile communication terminal respectively filter only necessary bands and compensate the signal, and transmit the signal to the main relay 100 through a single common RF cable 300. do.

Here, the additional extension repeater 200 performs a signal compensation function of forward and reverse signals and reverse diversity signals, receives a local frequency signal from the main repeater 100 and converts the reverse diversity signal into an intermediate frequency. RF interface module 202 for converting the signal to a single common RF cable 300 and outputting it, a high power amplifier 204 performing a high output power amplification function of the forward signal, and required bands for the reverse signal and the reverse diversity signal. A simple component having only bandpass filters 206 and 208 for performing a filtering function, respectively, can be implemented simply and inexpensively as compared with the configuration of the main repeater 100.

The high power amplifier 204 power amplifies the forward RF signal from the base station where the forward signal separation and signal compensation is performed through the RF interface module 202 to a high output of a required rated capacity, and is located in the corresponding shadow area through the SVC antenna. It can be transmitted to the mobile communication terminal side.

In addition, the bandpass filter 206 performs bandpass filtering to remove unwanted waves other than the carrier frequency band from the reverse RF signal received from the mobile communication terminal in the shaded area, and the bandpass filter 208 performs the Bandpass filtering is performed to remove unwanted waves other than the required band from the reverse diversity signal.

The RF interface module 202 of the additional extension repeater 200 includes a coupler 210, a diplexer 212, an attenuator 214, 220, 224, a low noise amplifier 216, 218, 222, a mixer 226, a modem ( 228), and includes a main control unit 230.

The coupler 210 includes a forward RF signal from the main repeater 100 through the single common RF cable 300, a local frequency signal, a reverse RF signal from the diplexer 212, and an intermediate frequency signal. Each type of reverse diversity signal is coupled and transmitted.

The diplexer 212 is connected to the coupler 210 and to the high power amplifier 204 via the attenuator 214 and the low noise amplifier 216, and the attenuator 220 and the low noise amplifier 218. And a forward RF signal from the coupler 210, a local frequency signal, and a reverse direction from the bandpass filter 206. Outputs a signal path for an RF signal and a reverse diversity signal in the form of an intermediate frequency signal from the mixer 226 to a specified path.

The attenuator 214 performs a level compensation operation of the RF signal through signal attenuation of the forward RF signal from the diplexer 212, and the low noise amplifier 216 forward rf from the attenuator 214. The signal is low noise amplified to compensate for signal loss caused by the cable and output to the high power amplifier 204.

The low noise amplifier 218 low noise amplifies the band pass filtered reverse RF signal through only the required band through the band pass filter 206, and the attenuator 220 attenuates the signal for the low noise amplified reverse RF signal. Through the level compensation of the RF signal is performed.

The low noise amplifier 222 low noise amplifies the reverse diversity signal through the bandpass filter 208, and the attenuator 224 compensates the signal level through signal attenuation for the low noise amplified reverse diversity signal. Do this.

The mixer 226 may provide a reverse diversity signal from the attenuator 224 via the coupler 210 and the diplexer 212 through the single common RF cable 300. The signal is synthesized with the local frequency signal from the signal, and the reverse diversity signal is converted into the intermediate frequency signal and output to the diplexer 212.

The modem 228 communicates with the modem 142 of the main repeater 100 via the coupler 210 and a single common RF cable 300 to control the main control unit of the repeater 200 for further expansion. The control information signal for control communication between the 230 and the main control unit 144 of the main repeater 100 is transmitted and received.

The main control unit 230 checks the state of the additional extension repeater 200 and generates the control information accordingly, and transmits the control information to the main repeater 100 through the modem 228, and the main repeater 100. Receives control information from the main control unit 144) and performs control to check the state between the additional extension repeater 200 and the main repeater 100.

In one embodiment of the present invention, the single common RF cable 300 is a forward RF signal from the base station through the main repeater 100 via one single RF cable, and is generated in the local signal generator A local frequency signal, a reverse RF signal from a mobile communication terminal through the additional extension repeater 200, a reverse diversity signal in the form of an intermediate frequency signal, and a control information signal in which communication is performed through modems 142 and 228 of each repeater, respectively. Send and receive

Operation according to an embodiment of the present invention made as described above will be described in detail with reference to FIG.

First, the main repeater 100 is connected to the additional extension repeater 200 that is fixedly installed in a predetermined shadow area and a single common RF cable 300.

In this state, the forward optical signal from the base station received from the optical module 102 of the main repeater 100 is photoelectrically converted through the forward RF module 104 and the signal path through the three-way divider 108. Are divided into three paths, two paths of which are forward RF signals FWD_0 through low noise amplification through each of the low noise amplifiers 110 and 112 and bandpass filtering of only the required bands through the bandpass filters 114 and 116, respectively. , FWD_1) is radiated through the SVC antenna.

In addition, through one of the three paths of the three-way divider 108, the forward RF signal is low-noise amplified by the low noise amplifier 118 and the signal compensation through the attenuator 120 through the diplexer ( 122 is output to the coupler 126 by signal routing, and is transmitted from the coupler 126 to the additional extension repeater 200 via a single common RF cable 300.

On the other hand, the local signal generator 124 generates a local frequency signal for converting the RF signal into an intermediate frequency signal, the diplexer 122 outputs the local frequency signal to the coupler 126, the coupler From 126 a local frequency signal is transmitted to the further extension repeater 200 via a single common RF cable 300.

In that state, the coupler 210 of the additional extension repeater 200 couples the forward RF signal and the local frequency signal respectively received through the single common RF cable 300 to each of the diplexers 212. ), And the diplexer 212 transmits the forward RF signal to a signal path on the designated high power amplifier 204 side.

The forward RF signal through the diplexer 212 of the additional expansion repeater 200 is subjected to the high power amplifier 204 through the compensation of the signal level through the attenuator 214 and the low noise amplification processing through the low noise amplifier 216. It is amplified by the rated capacity and radiated through the SVC antenna to the shaded area.

Meanwhile, the additional extension repeater 200 filters only the required bands through the band pass filters 206 and 208 for the reverse RF signal and the reverse diversity signal from the mobile communication terminal of the corresponding shaded region received through the SVC antenna. Low noise amplification through each of the low noise amplifiers 218 and 222 of the RF interface module 202, and then signal levels are compensated through the respective attenuators 220 and 224.

Here, the reverse RF signal passing through the low noise amplifier 218 and the attenuator 220 from the band pass filter 206 is output to the diplexer 212, while the low noise amplifier 222 from the band pass filter 206. And a reverse diversity signal through the attenuator 224 are output to the mixer 226, which is supplied from the main repeater 100 provided through the coupler 210 and the diplexer 212. And synthesizing the local frequency signal with the reverse diversity signal to convert the reverse diversity signal into an intermediate frequency signal.

The diplexer 212 outputs the reverse RF signal and the reverse diversity signal in the form of an intermediate frequency signal to the signal path of the predetermined coupler 210, respectively, and the coupler 210 is intermediate with the reverse RF signal. The reverse diversity signal of the frequency signal is coupled and transmitted to the main repeater 100 through the single common RF cable 300.

The coupler 126 of the main repeater 100 couples the reverse RF signal and the reverse diversity signal of the intermediate frequency signal received through the single common RF cable 300 to the diplexer 122. The diplexer 122 outputs the reverse RF signal directly to the coupler 136 by designating a signal path, while the reverse diversity signal in the form of the intermediate frequency signal is the local signal generator. And output to the mixer 138 together with the local frequency signal from 124.

The mixer 138 combines the intermediate frequency signal with a local frequency signal, converts the intermediate frequency signal into a reverse diversity signal in the form of an RF signal, and then outputs the reverse diversity signal to the coupler 140.

The coupler 136 receives the reverse RF signal of the corresponding main repeater 100 received through the two-way divider 128 and bandpass filtered through the bandpass filter 132. It is coupled to the reverse RF signal from the output to the reverse RF module 106.

On the other hand, in the coupler 140 of the main repeater 100, the two-way divider 130, the reverse diversity signal from the additional expansion repeater 200 converted into an RF signal through the mixer 138 And coupled to a reverse diversity signal of the corresponding main repeater 100 side reception through a bandpass filter 134 and outputs the reverse diversity signal to the reverse RF module 106.

The reverse RF module 106 converts the reverse RF signal from the coupler 136 and the reverse diversity signal from the coupler 140 to the optical module 102 as a reverse optical signal.

Next, another embodiment of the present invention will be described in detail with reference to the accompanying drawings.

That is, Figure 3 is a view showing the overall configuration of the expansion system of the optical repeater for wireless communication according to another embodiment of the present invention, another embodiment of the present invention shown in the figure is one embodiment of the present invention according to FIG. The same reference numerals are assigned to the same components as the examples, and detailed description thereof will be omitted.

As shown in FIG. 3, in another embodiment of the present invention, unlike one embodiment of the present invention, the local frequency signal is generated by the local signal generator 124 installed inside the corresponding main repeater 100. Rather, it allows a local frequency signal to be provided from a specific signal generator outside of the corresponding main repeater 100.

Here, the signal generating device for generating the local frequency signal externally is to be installed in the base station, the local frequency signal generated from the signal generating device in the base station is transmitted through the optical cable and supplied via photoelectric conversion, or separately It is also possible to be supplied to the main repeater 100 side through the RF cable.

In addition, the specific signal generator for generating the local frequency signal externally, it is also possible to be applied as a signal generator dedicated to the local signal that is connected to the main repeater 100 via an RF cable to generate only a local frequency signal. Do.

The diplexer 122 transmits the local frequency signal generated and supplied from the outside of the main repeater 100 to the additional extension repeater 200 through the coupler 126 and the common RF cable 300. And output to the mixer 138.

Although the overall embodiment of the present invention made as described above describes a configuration configured to expand and connect only one additional expansion repeater to the main repeater, the present invention is not limited thereto and at least two or more additional extensions to the main repeater. The configuration of the present invention is applicable to the case of allowing a repeater to be connected, and the configuration of the present invention can be applied even when connecting another additional extension repeater to an additionally extended repeater for the main repeater. It is possible.

While specific embodiments of the present invention have been described and illustrated above, it will be apparent that the present invention may be embodied in various modifications by those skilled in the art. Such modified embodiments should not be understood individually from the technical spirit or the prospect of the present invention, but should fall within the claims appended to the present invention.

1 is a view showing an expansion configuration using a conventional cascade (main cascade) main repeater,

2 is a view showing the overall configuration of the expansion system of the optical repeater for wireless communication according to an embodiment of the present invention;

3 is a diagram showing the overall configuration of the expansion system of the optical repeater for wireless communication according to another embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: main repeater, 102: optical module,

104, forward RF module, 106: reverse RF module,

108: 3-way divider, 110, 112, 118, 216, 218, 222: low noise amplifier,

114,116,132,134,206,208: bandpass filter,

120,214,220,224: attenuator, 122,212: diplexer,

128,130: 2-way divider, 138: mixer,

142,228: modem, 144,230: main control unit,

200: repeater for further expansion, 202: RF interface module,

204: high power amplifier, 300, 400: common RF cable,

Claims (10)

delete delete Receives forward signals from base stations, radiates to their installation area, transmits them to an additional extended repeater through a single common cable, and reverses from additional extended areas received from an additional extended repeater through a single common cable A main repeater for transmitting a signal and a reverse diversity signal to the base station in combination with a reverse signal and a reverse diversity signal from its installation area; The base station forward signal from the main repeater is received through a single common cable, and high power amplified by signal compensation and rated capacity to radiate to its own installation area, and filtering the reverse and reverse diversity signals received from its own installation area. And an additional expansion repeater for signal compensation and transmitting to the main repeater via a single common cable. And A single common cable connecting the main repeater with the additional extension repeater to form a signal path of a forward signal, a reverse signal, and a reverse diversity signal, The single common cable is a single common RF cable, The additional extension repeater converts the reverse diversity signal into an intermediate frequency signal and transmits the signal to the main repeater through the single common RF cable. And the main repeater converts the reverse diversity signal in the form of the intermediate frequency signal into an RF signal and combines the reverse diversity signal from its installation area. The method of claim 3, wherein The main repeater photoelectrically converts a forward optical signal from a base station into a forward RF signal, distributes the signal to a plurality of paths, and compensates the forward RF signal of any one of the paths for the additional expansion through the single common RF cable. Transmit a reverse RF signal from the additional extension repeater received through the single common RF cable to at least one reverse RF signal received from the installation area of the corresponding main repeater and transmit the reverse optical signal to the repeater. Transforming and transmitting to the base station, and the output of the radio repeater for specifying the signal path of the local frequency signal for converting the reverse RF signal to the intermediate frequency signal or the intermediate frequency signal to the RF signal output system. The method of claim 4, wherein Any one of the local frequency signals output after the signal path is designated and output from the main repeater is generated by a local signal generator installed inside the corresponding main repeater or supplied from a specific signal generator outside the main repeater. Expansion system of an optical repeater for wireless communication, characterized in that the signal through. The method of claim 4, wherein The additional extension repeater may perform signal compensation processing on a forward RF signal from the main repeater through the single common cable, a reverse RF signal and a reverse diversity signal received at an installation area of the corresponding additional extension repeater. An RF interface module for converting a reverse diversity signal into an intermediate frequency signal and transmitting the same through a single common RF cable and exchanging control information signals for mutual control communication with the main repeater; A high power amplifier for amplifying a forward RF signal through the RF interface module at a high output power according to a rated capacity; And a bandpass filter for bandpass filtering the reverse RF signal and the reverse diversity signal received from the installation area of the additional extension repeater, respectively, and outputting the bandpass filter to the RF interface module. . The method according to any one of claims 3 to 6, The additionally extended repeater is an extension of the optical repeater for wireless communication, characterized in that to receive the local frequency signal from the main repeater via the single common RF cable and synthesized with the reverse diversity signal into an intermediate frequency signal form system. delete It is connected to a specific additional extension repeater through a single common RF cable, and converts a forward optical signal from a base station into a forward RF signal by photoelectric conversion and distributes the signal through a plurality of paths, and compensates the forward RF signal of one of the paths for signal compensation. At least one received from the installation area of the main repeater by transmitting a reverse RF signal from the additional extension repeater received through the single common RF cable to the additional extension repeater through the single common RF cable. Coupling with the reverse RF signal of the optical signal to the reverse optical signal and transmits to the base station, by specifying the signal path of the local frequency signal for converting the reverse RF signal to the intermediate frequency signal or the intermediate frequency signal to the RF signal Output, A main repeater for converting a reverse diversity signal in the form of an intermediate frequency signal into an RF signal and combining the reverse diversity signal from its own installation area. Connected to the main repeater via a single common RF cable, the base station forward RF signal from the main repeater is high-power amplified with signal compensation and rated capacity, radiated to its own installation area, and reverse RF received from its installation area. The signal and the reverse diversity signal are filtered and signal compensated, respectively, and transmitted to the main repeater. And repeating the reverse diversity signal into an intermediate frequency signal for transmission over the single common RF cable.

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