KR20040020285A - Repeater extension unit - Google Patents

Abstract

PURPOSE: A device for expanding a repeater is provided to offer diversity to a PRU(Pico BTS(Base Transceiver Subsystem) Remote Unit) and the repeater irrespective of the number of PRUs and the type of the repeater. CONSTITUTION: The first DC(Directional Coupler) combining unit(100) attenuates a forward transmission signal inputted from the first PRU by a uniform level, and outputs the attenuated forward transmission signal. The first DC combining unit(100) attenuates an inputted reverse reception signal by the uniform level, and outputs the attenuated reverse reception signal to the first PRU. The second DC combining unit(110) attenuates a forward transmission signal inputted from the second PRU by a uniform level, and outputs the attenuated forward transmission signal. The second DC combining unit(110) attenuates an inputted reverse reception signal by the uniform level, and outputs the attenuated reverse reception signal to the second PRU. The third DC combining unit(120) outputs a forward transmission signal inputted from the third PRU, and outputs one among inputted reverse reception signals to the third PRU. The first repeater combining unit(130) divides the forward transmission signal inputted from one among the first to third DC combining units(100,110,120), and outputs the divided forward transmission signals to at least one repeater. The second repeater combining unit(140) attenuates a reverse reception signal inputted from one among repeaters by a uniform level, divides the attenuated reverse reception signal, and outputs the divided reverse reception signals to the second and third DC combining units(110,120). The third repeater combining unit(150) attenuates a reverse reception signal inputted from one among the repeaters by a uniform level, divides the attenuated reverse reception signal, and outputs the divided reverse reception signals to the first and second DC combining units(100,110).

Description

Repeater extension unit

The present invention relates to a repeater expansion device of a mobile communication system. More particularly, the present invention relates to a repeater extension device connected between a base station and a repeater to provide a diversity function to both the base station and the repeater.

Currently, many base stations use PICO BTS (hereinafter referred to as secondary relay device) of low cost and compact design to cover a low capacity area that does not require the capacity of a standard base station (BTS). Secondary relays have the disadvantage of being inexpensive and compact while having limited capacity, but can be very effective in cell planning when placed in the appropriate area. One to three secondary relays are installed in the same place in different directions according to the number of FAs, and provide diversity functions according to the connection between the secondary relays. Meanwhile, in order to improve the call quality for the shadow area, the downlink RF signal of the base station is transmitted to the slave repeater through the master repeater (Master) and then transmitted using the repeater, and the uplink RF signal received by the repeater is transmitted to the base station. By transmitting, the call quality in the shadow area is improved. In order to extract an RF signal from a base station, an input / output terminal included in the base station itself may be used, but an RF signal may be extracted by installing a directional coupler at an antenna terminal of the base station. Repeaters, like base stations, provide diversity.

However, there is a situation in which the diversity function of the secondary relay device is lost or the diversity function of the repeater is lost depending on the connection method between the secondary relay device and the relay period. 1A to 1B are exemplary views showing a preferred wiring method according to the number of secondary relay devices for implementing the diversity function of the secondary relay device when the relays are not coupled, and FIGS. 2A to 2B are secondary relay devices. 2 is an exemplary diagram illustrating a wiring method in which the diversity of the secondary repeater or repeater is lost.

Fig. 1A shows a preferred wiring method when there are two secondary relay devices. The DUP (Duplexer) terminal of FA1 PRU (PICO BTS Remote Unit) is connected to the DIV (Diversity) terminal of FA2 sub repeater, and the DIV terminal of FA1 sub repeater is connected to the DUP terminal of FA2 sub repeater. Each is wired. The Tx signal of the FA1 secondary relay is output from the duplexer 10 through the antenna, and the Tx signal of the FA2 secondary relay is output from the duplexer 20 through the antenna. The input terminals of Rx1 (11, 21) are not connected (Not-Connected; denoted as (N.C) in the figure), and the two-contact switches 13, 23 are automatically switched by the PLD. In accordance with the terminal-to-terminal connection of the secondary relay described above, the diversity of the FA1 secondary relay is provided from the 2: 1 distributor 12 of the FA2 secondary relay, and the diversity of the FA2 secondary relay is 2 of the FA1 secondary relay. 1 is provided from the dispenser 22.

Fig. 1B shows a preferred wiring method when there are three secondary repeaters. DUP terminal of FA1 subsidiary relay device is connected with DIV terminal of FA2 subsidiary relay device, and DIV terminal of FA1 subsidiary relay device is connected with DUP terminal of FA3 subsidiary relay device, respectively. The DUP terminal of the FA2 secondary relay is connected to the DIV terminal of the FA3 secondary relay. Accordingly, the diversity of the FA1 subsidiary relay device is provided from the FA3 subsidiary relay device, the diversity of the FA2 subsidiary relay device from the FA1 subsidiary relay device, and the diversity of the FA3 subsidiary relay device from the FA2 subsidiary relay device.

Referring to FIG. 2A, a state in which the diversity of the repeater 30 is lost by connecting the Rx1 output terminal of the repeater 30 to the Rx1 input terminal of the secondary repeater is illustrated. Here, the repeater 30 is a Tx / Rx0 integrated repeater. That is, although the Rx1 output terminal of the repeater 30 is connected to each input terminal of the Rx1 (11, 21) of the FA1, 2 part repeater, the 2-contact switch is connected by the connection between the FA1 part repeater and the FA2 part repeater. Is off (ie, connected to the DIV terminal), the Rx1 signal of the repeater 30 is not input to the FA1, secondary relay. Thus, the diversity function of the repeater is not implemented.

On the contrary, as shown in FIG. 2B, in order to implement diversity of the repeater 30, the FA1 and the 2 part relay devices do not have the wiring shown in FIG. 1A, and the diversity of the FA1 and 2 part relay devices. Weakens. That is, the diversity function of the FA1, 2 part repeater is connected to the 2: 1 divider 34, 35 in which the DUP terminal which outputs the distribution signal of the 2: 1 divider of the FA1, 2 part repeater is insulated. This weakens or is lost.

Wiring resulting in the diversity loss of the sub-relay device or repeater described in FIGS. 2A to 2B occurs in the case of three sub-relay devices.

The above-mentioned loss of diversity of the secondary repeater or repeater can be solved by correct wiring between the two devices. In practice, however, the wiring for maintaining the diversity of the above-described secondary relays and repeaters is very complicated, and dozens of combinations of combinations occur depending on the number of secondary relays and the type of repeaters. Therefore, it is practically impossible for a technician who installs and operates a base station to install and maintain dozens of connection combinations for each situation.

Accordingly, in order to solve the above-mentioned problems, an object of the present invention is to provide a diversity device connected to a repeater and a repeater regardless of the number of repeaters and the type of repeater to provide diversity to both the repeater and the repeater. It is to provide an expansion device.

Another object of the present invention is to provide a maximum of eight repeaters to at least one secondary relay device when the operator connects the secondary relay device and the repeater according to a simple simple connection method regardless of the number of secondary relay devices and the number and type of repeaters. It is to provide a repeater expansion device that can be connected.

1A to 1B are exemplary diagrams showing a preferred wiring method according to the number of PICO BTSs for implementing the diversity function of the secondary relay device.

2A to 2B are exemplary views illustrating a wiring method in which the diversity function of a subsidiary repeater or repeater is lost.

Figure 3 is a block diagram schematically showing the configuration of a repeater expansion device according to an embodiment of the present invention.

4 is a block diagram showing the actual configuration of the repeater expansion device shown in FIG.

5 is a diagram illustrating a connection relationship between an internal configuration of a repeater expansion device and an auxiliary relay device according to another embodiment of the present invention.

6 is an exemplary view in which connection terminals of the repeater expansion device according to the preferred embodiment of the present invention are arranged.

In order to achieve the above objects, according to an aspect of the present invention, in the repeater expansion device that is connected between the base station consisting of at least one secondary relay device and n repeaters to provide a diversity function to both the base station and the repeater, the first From the first DC coupling unit, the second sub-relay device to attenuate the forward Tx signal inputted from the secondary relay device by a predetermined amount, and to attenuate the input reverse Rx signal by a predetermined magnitude and output the same to the first secondary relay device. A second DC coupling unit which attenuates the input forward Tx signal by a predetermined magnitude and outputs the attenuated reverse Rx signal by a predetermined magnitude, and outputs it to the second secondary relay; and a forward Tx input from the third secondary relay A third DC coupling unit which outputs a signal and outputs one of the input reverse Rx signals to the third secondary relay device, the first DC A first repeater coupling unit for branching the forward Tx signal inputted from any one of the summation unit, the second DC coupling unit and the third DC coupling unit, and outputting it to at least one repeater; a reverse direction input from any one of the repeaters After attenuating the Rx signal by a predetermined magnitude, branching and attenuating the reverse Rx signal input from any one of the repeater and the second repeater coupling unit and the repeater outputting the second DC coupling unit and the third DC coupling unit A repeater expansion device including a third repeater coupling unit which branches after being output to the first DC coupling unit and the second DC coupling unit is provided.

According to another aspect of the present invention, a repeater extension device connected between a base station having m secondary repeaters and n repeaters to provide a diversity function to both the base station and the repeater, the antennas of the m secondary relays A first m: 1 divider coupled to a directional coupler provided at the first directional coupler, and receiving a Tx signal from one of the directional couplers, and branching the Tx signal output from the m: 1 divider to n repeaters; An n divider, a second 1: n divider receiving an Rx signal from one of the repeaters, and an Rx signal output from the first 1: n divider are branched and applied to a directional coupler installed in the antennas of the m sub-relay devices. A second m: 1 divider, a third 1: n divider receiving an Rx signal from one of the repeaters, and a third 1: n divider A repeater expansion device including a third m: 1 divider for branching the output Rx signals and applying them to a directional coupler installed at the DIV (Diversity) stages of the m sub-relay devices is provided.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the description of the present invention with reference to the embodiments is intended to facilitate understanding of the present invention by those skilled in the art to which the present invention pertains, and it is described in the accompanying drawings and the detailed description of the present invention. It is not limited to an Example.

3 is a block diagram schematically showing the configuration of the repeater expansion device according to an embodiment of the present invention, Figure 4 is a block diagram showing the actual configuration of the repeater expansion device shown in FIG.

The repeater expansion device includes a first DC coupler 100, a second DC coupler 110, a third DC coupler 120, a first repeater coupler 130, and a second repeater. Coupling unit 140 and the third repeater coupling unit 150 is included.

The first DC coupling unit 100, the second DC coupling unit 110, and the third DC coupling unit 120 may receive a Tx signal from a directional coupler connected between a base station (hereinafter referred to as a secondary relay device) and an antenna, or Alternatively, the Rx0 signal / Rx1 signal (hereinafter collectively referred to as Rx signal) is input to the directional coupler. Hereinafter, the directional coupler coupled to the nth DC coupler is referred to as an nth directional coupler. In addition, the plurality of secondary relay devices should be connected as shown in FIG. 1A or 1B to support diversity. In FIG. 4, three sub-relay devices are illustrated as being coupled to the repeater expansion device, but this is an example, and in practice, one or two sub-relay devices may be connected. In the present specification, a divider having n left terminals and m right terminals is referred to as an n: m divider based on the drawings. In addition, the n terminals on one side of the 1: n divider or the n: 1 divider used in the present invention are isolated from each other, so a signal input to any one of the n terminals is not output to the n other terminals. .

The first DC coupling unit 100 includes a DC connection terminal, a first repeater coupling unit connecting terminal, and a third repeater coupling unit connecting terminal, through which the first directional coupler and the first repeater coupling are installed in the antenna of the secondary relay device. Couple to the unit 130 and the third repeater coupling unit 150, respectively. The first DC coupling unit 100 is composed of an attenuator 102 and a 1: 2 divider 104 coupled in series thereto. The attenuator 102 attenuates the Tx signal input from the first directional coupler by 3 dB through the DC connection terminal and outputs the signal to the 1: 2 divider 104 and, conversely, the Rx signal input from the 1: 2 divider 104. Attenuate by 3dB and output to the first directional coupler through the DC connection terminal.

The second DC coupling unit 110 includes a DC connecting terminal, a first repeater coupling unit connecting terminal, and a second repeater connecting terminal, through which the second directional coupler and the first repeater coupling unit ( 130 and the second repeater coupling unit 140, respectively. The second DC coupler 110 is composed of an attenuator 112 and a 1: 2 divider 114 coupled in series thereto. The attenuator 112 attenuates the Tx signal input from the second directional coupler by 3 dB through the DC connection terminal and outputs the signal to the 1: 2 divider 114 and, conversely, the Rx signal input from the 1: 2 divider 114. Attenuate by 3dB and output to the second directional coupler through the DC connection terminal.

The third DC coupling unit 120 is a 1: 3 divider, and includes a left terminal which is a DC connection terminal, and three right terminals that are a first port connecting terminal, a second port connecting terminal, and a third repeater connecting unit connecting terminal. And coupled to the third directional coupler, the first port 160, the second port 170, and the third repeater coupler 150, respectively. The third DC coupling unit 120 outputs the Tx signal input from the third directional coupler to the first port connection terminal, and the output Tx signal is output to the first repeater coupling unit 130 through the first port 160. Is approved. In addition, the third DC coupling unit 120 outputs the Rx signal input through the second port connection terminal and the third repeater coupling unit connection terminal to the third directional coupler.

The first port 160 includes a first repeater coupling part connecting terminal and a third DC coupling part connecting terminal, and is coupled between the third DC coupling part 120 and the first repeater coupling part 130. By connecting / disconnecting the first relay coupler connection terminal and the third DC coupler connection terminal of the first port 160, the third DC coupler 120 and the first repeater coupler 130 are interconnected, or Or you can disconnect.

The second port 170 includes a second repeater coupling part connecting terminal and a third DC coupling part connecting terminal, and is coupled between the third DC coupling part 120 and the second repeater coupling part 140. By connecting / disconnecting the second relay coupler connection terminal and the third DC coupler connection terminal of the second port 170, the third DC coupler 120 and the second repeater coupler 140 may be interconnected. Or you can disconnect.

The first repeater coupling unit 130 includes a first DC coupling unit connecting terminal, a second DC coupling unit connecting terminal, a first port connecting terminal, and n repeater connecting terminals, and thus, the first DC coupling unit 100. , The second DC coupler 110, the third DC coupler 120, and the n repeaters, respectively. The first repeater coupling unit 130 is a 3: 1 divider that outputs a Tx signal input from any one of the first DC coupling unit 100, the second DC coupling unit 110, and the third DC coupling unit 120. And a 1: n divider 134 for branching and outputting the Tx signal output from the 132 and the 3: 1 divider 132 to n repeaters. Here, in the case where the type of repeater coupled to the repeater expansion device is a Tx / Rx0 integrated type, the 1: n divider 134 receives and outputs an Rx signal input from any one of the n repeaters, and the 3: 1 divider ( 132 branches and outputs the output Rx signal to the first DC coupling unit 100, the second DC coupling unit 110, and the third DC coupling unit 120.

The second repeater coupling part 140 includes a second DC coupling part connecting terminal, a second port connecting terminal, and n repeater connecting terminals, and thus, the second DC coupling part 110 and the third DC coupling part 120. ) And n repeaters, respectively. The second repeater coupling unit 140 attenuates the Rx signal output from the 1: 8 divider 146 and the 1: 8 divider 146 and receives the Rx signal input from any one of the n repeaters by 3 dB. And a 2: 1 divider 142 for branching the attenuator 144 and the Rx signal outputted from the attenuator 144 to the second DC coupling unit 110 and the third DC coupling unit 120.

The third repeater coupling part 150 includes a first DC coupling part connecting terminal, a third DC coupling part connecting terminal, and n repeater connecting terminals, and thus, the first DC coupling part 100 and the third DC coupling part ( 120) and n repeaters, respectively. The third repeater coupling unit 150 attenuates the Rx signal output from the 1: 8 divider 156 and the 1: 8 divider 156 and the Rx signal received from any one of the n repeaters by 3 dB. And a 2: 1 divider 152 for branching the Rx signal output from the attenuator 154 and the attenuator 154 to the first DC coupling unit 100 and the third DC coupling unit 120.

Hereinafter, an operation of the repeater expansion device combined with three secondary repeating devices will be described. For convenience of explanation, the Rx signal is divided into an Rx0 signal and an Rx1 signal, and the operation of the repeater extension device when the Tx / Rx split type repeater is combined is described first, and then the Tx / Rx integrated repeater is combined. The operation of the repeater expansion device will be described.

The Tx, Rx0 and Rx1 stages of the Tx / Rx split type repeater are electrically connected to the first repeater coupling unit 130, the second repeater coupling unit 140, and the third repeater coupling unit 150, respectively. Here, up to eight Tx / Rx split type repeaters may be connected to the repeater expansion device.

The forward Tx signal input from the first sub-relay device 40 to the third sub-relay device 44 is transmitted by the first relay coupling unit 130 by the first DC coupling unit 100 to the third DC coupling unit 120. Is applied. The applied Tx signal is branched by the first repeater coupling unit 130 and then input to the Tx terminal of the first to eighth repeaters.

The reverse Rx0 signal output from the Rx0 end of the first to eighth repeaters and the reverse Rx1 signal output from the Rx1 end are applied to the second repeater coupling unit 140 and the third repeater coupling unit 150, respectively. The second repeater coupling unit 140 attenuates the applied reverse Rx0 signal by 3 dB and then branches and applies it to the second DC coupling unit 110 and the third DC coupling unit 120, and the third repeater coupling unit 150. ) Attenuates the applied reverse Rx1 signal by 3 dB and then branches and applies it to the first DC coupling unit 100 and the third DC coupling unit 120. Accordingly, the first DC coupling unit 100 directly outputs the reverse Rx1 signal to the first secondary relay 40, and the second DC coupling unit 110 outputs the reverse Rx0 signal to the second secondary relay 42. The third DC coupling unit 120 directly outputs the reverse Rx0 signal and the reverse Rx1 signal to the third secondary relay 42. In addition, the first sub-relay device 40 to the third sub-relay device 44 is preferably connected as shown in Figure 1b, which can receive the Rx signal fed back from the other sub-relay device.

The Tx / Rx0 stage and the Rx1 stage of the Tx / Rx integrated repeater are electrically connected to the first repeater coupling unit 130 and the third repeater coupling unit 150, respectively. Here, up to eight Tx / Rx integrated repeaters may be connected to the repeater expansion device.

The forward Tx signal input from the first sub-relay device 40 to the third sub-relay device 44 is transmitted by the first relay coupling unit 130 by the first DC coupling unit 100 to the third DC coupling unit 120. Is applied. The applied Tx signal is branched by the first repeater coupling unit 130 and then input to the Tx / Rx0 stage of the first to eighth repeaters.

The reverse Rx0 signal output from the Tx / Rx0 stages of the first to eighth repeaters and the reverse Rx1 signal output from the Rx1 stage are applied to the first repeater coupling unit 130 and the third repeater coupling unit 150, respectively. The first repeater coupling unit 130 branches the applied reverse Rx0 signal to the first DC coupling unit 100 to the third DC coupling unit 120, and the third repeater coupling unit 150 is applied in the reverse direction. The Rx1 signal is attenuated by 3 dB and then branched and applied to the first DC coupling unit 100 and the third DC coupling unit 120. Accordingly, the first DC coupling unit 100 directly outputs a reverse Rx0 signal and a reverse Rx1 signal to the first secondary relay 40, and the second DC coupling unit 110 to the second secondary relay 42. The reverse Rx0 signal is directly output, and the third DC coupling unit 120 directly outputs the reverse Rx0 signal and the reverse Rx1 signal to the third secondary relay 44. In addition, the first sub-relay device 40 to the third sub-relay device 44 is preferably connected as shown in Figure 1b, which can receive the Rx signal fed back from the other sub-relay device.

The wiring method according to the number of sub-relays, the number of sub-relays, and the Rx signal input to each sub-relay according to the type of repeater will be described with reference to the table below.

[table]

Number of repeaters Division repeater Direct Rx Signal: Tx / Rx Integral Repeater Recurve Rx Signal: Tx / Rx Integrated Repeater Direct Rx Signal: Tx / Rx Isolated Repeater Recall Rx Signal: Tx / Rx Detachable Repeater One 1st FA Sub Repeater Rx0 Rx1 Rx0 Rx1 2 1st FA Sub Repeater Rx0 Rx0, Rx1 Rx0 Rx0, Rx1 2nd FA Sub Repeater Rx0, Rx1 Rx0 Rx0, Rx1 Rx0 3 1st FA Sub Repeater Rx0, Rx1 Rx0, Rx1 Rx1 Rx0, Rx1

2nd FA Sub Repeater Rx0 Rx0, Rx1 Rx0 Rx1 3rd FA Sub Repeater Rx0, Rx1 Rx0 Rx0, Rx1 Rx0

When the number of secondary relays is 1, the directional coupler coupled between the duplexer and the Tx / Rx0 antenna is connected to the second DC coupling unit 110, and the directional coupler coupled between the Rx1 receiver and the Rx1 antenna is connected to the third DC. It is connected to the coupling portion 120. The first port 160 and the second port 170 are open, respectively. The direct Rx signal when the number of secondary relays is 1 is the Rx signal output from the second DC coupling unit 110, and the feedback Rx signal is the signal output from the Rx1 receiver.

When the number of secondary relays is 2, the directional coupler coupled between the duplexer of the first secondary relay and the Tx / Rx0 antenna is connected to the second DC coupling unit 110, and the duplexer and Tx / of the secondary secondary relay are connected. The directional coupler coupled between the Rx0 antennas is connected to the third DC coupler 120. The first port 160 and the second port 170 are connected to each other to connect the third DC coupling unit 120, the first repeater connection unit 130, and the second repeater connection unit 140. The direct Rx signal when the number of secondary relays is 2 is the Rx signal output from the second DC coupling unit 110 and the third DC coupling unit 120, and the feedback Rx signal of the first secondary relay is the second secondary unit. The direct Rx signal of the relay device and the feedback Rx signal of the second secondary relay device are the direct Rx signals of the first secondary relay device.

When the number of secondary relays is 3, the directional coupler coupled between the duplexer of the first secondary relay and the Tx / Rx0 antenna is connected to the first DC coupling unit 100 and the duplexer and Tx / of the secondary secondary relay are connected. The directional coupler coupled between the Rx0 antennas is connected to the second DC coupling unit 110, and the directional coupler coupled between the duplexer of the third secondary relay and the Tx / Rx0 antenna is connected to the third DC coupling unit 120. do. The first port 160 and the second port 170 are connected to each other to connect the third DC coupling unit 120, the first repeater connection unit 130, and the second repeater connection unit 140. The direct Rx signal when the number of secondary relays is 3 is the Rx signal output from the first DC coupling unit 100 to the third DC coupling unit 120, and the feedback Rx signal of the first secondary relay is the third unit. The direct Rx signal of the relay device, the feedback Rx signal of the second secondary relay device is the direct Rx signal of the first secondary relay device, and the feedback Rx signal of the third secondary relay device is the direct Rx signal of the second secondary relay device.

FIG. 5 is a diagram illustrating a connection relationship between an internal configuration of a repeater expansion device and an auxiliary relay device according to another embodiment of the present invention. For convenience of explanation, a repeater expansion device in which three secondary repeaters and eight repeaters are combined will be described as an example.

Three secondary relays 40, 42, 44 are wired as shown in FIG. 1B and directional couplers 50, 52, 54, 60, 62, 64 coupled to the Tx / Rx0 antenna stage and the DIV stage. It includes. If the number of secondary relays is 2, the secondary relays are arranged with four connection terminal pairs consisting of three terminals at the bottom of the repeater extension. The leftmost secondary relay connecting terminal pair is for electrically connecting the secondary relay to the repeater expansion device, and up to three secondary relay devices may be coupled to the repeater expansion device. The remaining relay connection terminal pairs except for the leftmost terminal repeater connection terminal pair are for electrically connecting the repeater to the repeater expansion device, and one repeater connection terminal pair corresponds to one repeater. Tx, Rx0 and Rx1 terminals are arranged in order, and all repeater connection terminal pairs have the same configuration and the same arrangement. Therefore, the operator connects one to three secondary relays to the leftmost pair of secondary relay terminals, connects or disconnects the first port and the second port according to the number of secondary relay devices, and the remaining relay connection terminals. By connecting the Tx, Rx0, and Rx1 stages of the repeaters to the pair only in the specified order, diversity can be provided to both the secondary repeater and the repeater.

In the present specification, a repeater extension device coupled between the secondary repeater and the repeater to support the diversity function of both the secondary repeater and the repeater has been described with reference to the embodiment. However, the present invention is not limited to the above embodiments, and many variations are possible by those skilled in the art within the spirit of the present invention. In addition, the scope of the present invention can be interpreted only by the claims described below.

As described above, the present invention provides a repeater expansion device which is connected between a secondary repeater and a repeater regardless of the number of repeaters and the type of repeater to provide diversity to both the secondary repeater and the repeater.

Therefore, if the operator connects the secondary repeater and the repeater according to a simple simple connection method regardless of the number of repeaters and the number and type of repeaters, up to eight repeaters can be connected to at least one secondary repeater.

Claims (11)

A repeater extension device connected between a base station composed of at least one secondary relay device and n repeaters to provide a diversity function to both the base station and the repeater, A first DC coupling unit which attenuates and outputs the forward Tx signal inputted from the first sub-relay device by a predetermined magnitude, and attenuates the input reverse Rx signal by a predetermined magnitude and outputs it to the first sub-relay device; A second DC coupling unit which attenuates and outputs the forward Tx signal inputted from the second sub-relay device by a predetermined magnitude, and attenuates the input reverse Rx signal by a predetermined magnitude and outputs it to the second sub-relay device; A third DC coupling unit configured to output a forward Tx signal input from a third sub relay, and output one of the input reverse Rx signals to the third sub relay; A first repeater coupling unit for branching a forward Tx signal input from any one of the first DC coupling unit, the second DC coupling unit, and the third DC coupling unit to be output to at least one repeater; A second repeater coupling unit which attenuates the reverse Rx signal input from any one of the repeaters by a predetermined magnitude and then branches and outputs the branched Rx signal to the second DC coupling unit and the third DC coupling unit; And And a third repeater coupling unit configured to attenuate the reverse Rx signal inputted from any one of the repeaters by a predetermined magnitude and then branch and output the branched Rx signal to the first DC coupling unit and the second DC coupling unit. The method of claim 1, The first DC coupler and the second DC coupler, An attenuator for attenuating the forward Tx signal and the reverse Rx signal by -3 dB input from the first secondary relay; And Serially coupled to the attenuator, outputting a forward Tx signal output from the attenuator to the first repeater coupling section, and a reverse Rx signal input from any one of the first repeater coupling section and the third repeater coupling section; Repeater expansion unit comprising a 1: 2 divider to provide as input. The method of claim 1, The first repeater coupling portion, Repeater expansion device for branching the reverse Rx signal input from any one of the repeater and outputs to the first DC coupling unit, the second DC coupling unit and the third DC coupling unit. The method of claim 3, The first repeater coupling portion, Outputting a forward Tx signal input from any one of the first DC coupling unit and the third DC coupling unit, and branching the input reverse Rx signal to output the first DC coupling unit to the third DC coupling unit 3 : 1 divider; And A 1: n divider for branching a forward Tx signal output from the 3: 1 divider to the n repeaters and outputting the reverse Rx signal input from any one of the n repeaters to the 3: 1 divider Repeater expansion device that includes. The method of claim 1, The second repeater coupling portion and the third repeater coupling portion, A 1: n divider for outputting a reverse Rx signal input from any one of the n repeaters; An attenuator for attenuating the reverse Rx signal output from the 1: n divider by 3 dB; And And a 2: 1 divider for branching the reverse Rx signal outputted from the attenuator and outputting the reversed Rx signal to the first DC coupling unit and the third DC coupling unit. The method of claim 1, Repeater expansion device wherein the number n of repeaters is eight. The method of claim 1, A first port coupled between the third DC coupling portion and the first repeater coupling portion through two terminals; And Further comprising a second port coupled between the third DC coupling portion and the second repeater coupling portion through two terminals, When the number of sub-relay devices coupled to the repeater expansion device is 1, both terminals of the first port and the second port are opened to couple the third DC coupling part, the first repeater coupling part, and the second repeater coupling. Repeater expansion unit that can block the connection to the department. The method of claim 7, wherein When the number of sub-relay devices coupled to the repeater expansion device is 2 or more, the third DC coupling part, the first repeater coupling part, and the second repeater coupling are connected by connecting both terminals of the first port and the second port. Repeater expansion unit that can connect departments. A repeater extension device connected between a base station having m secondary repeaters and an n repeater to provide a diversity function to both the base station and the repeater, A first m: 1 divider coupled to the directional couplers installed on the antennas of the m sub-relays and receiving a Tx signal from any one of the directional couplers; A first 1: n divider for branching the Tx signals output from the m: 1 divider and applying them to n repeaters; A second 1: n divider which receives an Rx signal from any one of the repeaters; A second m: 1 divider for branching the Rx signals outputted from the first 1: n divider and applying them to the directional couplers installed in the antennas of the m sub-relay devices; A third 1: n divider which receives an Rx signal from any one of the repeaters; And And a third m: 1 divider for branching the Rx signals outputted from the third 1: n dividers and applying them to the directional couplers installed at the DIV (Diversity) stages of the m sub-relay devices. The method of claim 9, M is 1 to 3, and n is 1 to 8. The method of claim 8, The first 1: n divider receives an Rx signal from one of the repeaters and outputs the Rx signal to the first m: 1 divider, And the first m: 1 divider branches the Rx signals and applies them to the directional couplers installed in the antennas of the m subsidiary repeaters.