KR20240092554A - 5th generation relay device supporting active MIMO service - Google Patents

Abstract

The present invention discloses a 5th generation relay device that supports an active MIMO service that supports an active MIMO service in a distributed repeater device that supports ultra-high frequencies. The 5th generation relay device of the present invention allows a 5th generation NR (New Radio) repeater device including a donor unit and a service unit connected through a transmission line to selectively service a seesaw signal or MyMo signal to a user terminal. It is characterized by

Description

5th generation relay device supporting active MIMO service}

The present invention relates to a 5th generation relay technology that supports an active MIMO service in a distributed repeater device supporting ultra-high frequencies. More specifically, it relates to a 5th generation NR (New Radio) device that includes a donor unit and a service unit connected through a transmission line. ) This relates to a 5th generation relay device that supports an active MIMO service that allows the relay device to selectively service seesaw signals or MyMo signals to user terminals.

In general, 5th generation (5G) relay systems are implemented in ultra-high frequency (mmWave) bands (e.g., 20 to 60 GHz) to achieve high data transmission rates. When building a wireless network with a 5G relay device, beamforming, MIMO (Multi Input Multi Output), and seesaw (MIMO) are used to alleviate the path loss of radio waves in the ultra-high frequency band and increase the transmission distance of radio waves. SISO (Single Input Single Output), array antenna, analog beamforming, and large scale antenna technologies are being applied.

In the 5G relay system, relay devices are used to improve call quality and expand coverage in areas where radio waves from the base station are difficult to reach or where radio waves are blocked due to terrain. In particular, in the case of an in-building repeater, the donor unit (DU) and the service unit (SU: Service Unit) are connected to each other through a transmission line (TL), which uses optical/coaxial/ UTP (Unshielded Twisted Pair), etc. may be used.

Figure 1 is a block diagram of a 5th generation relay device according to the prior art, and as shown, it includes a base station 10, a donor unit 20, service units 30A-30N, and a user terminal 40.

The donor unit 20 wirelessly receives the seesaw signal (SISO) and MIMO signal in the high frequency band from the base station 10, converts them into digital optical signals, and transmits them to the service unit (30A-) through the transmission line (TL). 30N) side. Here, the transmission line (TL) is an optical line.

The service units (30A-30N) are each connected to the donor unit 20 through a transmission line (TL), and receive a seesaw signal (SISO) and a mymo signal (SISO) in the form of a digital optical signal input from the donor unit (20). MIMO) is converted into a high frequency (RF) signal. The service units 30A-30N transmit a specific signal, for example, a seesaw signal (SISO) among the high-frequency seesaw signal (SISO) and the MIMO signal, to the user terminal 40 in the corresponding service area.

However, such a conventional 5th generation relay device transmits a specific signal (e.g., seesaw signal) to the user terminal even if the service units receive the seesaw signal and the MyMo signal at the same time, if their transmission lines are not physically separated. There is a problem in that signals (e.g. MyMo signals) cannot be serviced.

Moreover, in order to physically separate the seesaw signal and the Mymo signal, there is a problem that the transmission line cost is more than doubled and twice the installation space must be provided.

The problem to be solved by the present invention is to provide a 5th generation relay device that supports an active MIMO service that can selectively service a seesaw signal or MIMO signal through one high frequency block in a distributed repeater device supporting ultra-high frequencies. there is.

The 5th generation relay device supporting the active MIMO service of the first embodiment according to the present invention for achieving the above object includes a base station connecting a network and service units for wireless communication services; A donor unit that wirelessly receives high-frequency seesaw signals and MyMo signals from the base station, converts them into digital optical signals, and outputs them; And the service units that input a seesaw signal and a mymo signal in the form of a digital optical signal from the donor unit and selectively transmit one of them to the user terminal.

In addition, the donor unit includes a first ultra-high frequency antenna unit that transmits and receives signals to and from the base station through an antenna; A first high-frequency converter that converts the high-frequency seesaw signal and Mymo signal input from the ultra-high frequency antenna unit into a baseband signal and outputs it; And a first data transmission unit that converts the seesaw signal and MyMo signal of the baseband input from the first high frequency converter into a digital optical signal and outputs it to the service units.

In addition, the service unit includes a second data transmission unit that separates the seesaw signal and the MyMo signal in the form of a digital optical signal input from the donor unit into the seesaw signal and the MyMo signal through a digital signal processing process; A second CPU that controls to select and output one of the seesaw signal and the Mymo signal separated from the second data transmission unit at the request of the operator; a second high-frequency converter that converts the digital seesaw signal or mymo signal input from the second data transmission unit into a high-frequency signal; And a second ultra-high frequency antenna unit that converts the high-frequency seesaw signal or MyMo signal input from the second high-frequency converter into ultra-high frequency and transmits it to the user terminal located in the corresponding service area.

The 5th generation relay device supporting the active MIMO service of the second embodiment according to the present invention for achieving the above object includes a base station connecting a network and service units for wireless communication services; A donor unit that receives high-frequency seesaw signals and MyMo signals from the base station, converts them into analog optical signals, and outputs them; and the service units that receive a seesaw signal and a MyMo signal in the form of an analog optical signal from the donor unit and selectively transmit one of them to the user terminal.

In addition, the donor unit includes a first ultra-high frequency antenna unit that transmits and receives signals to and from the base station through an antenna; A first high-frequency converter that converts the high-frequency seesaw signal and Mymo signal input from the ultra-high frequency antenna unit into an intermediate frequency signal form; And a first analog optical module that converts the seesaw signal and MyMo signal in the form of an intermediate frequency signal input from the first high frequency converter into an analog optical signal and outputs it to the service units.

In addition, the service unit includes a second analog optical module that selects and outputs one of the analog-separated seesaw signal and the mymo signal received from the donor unit; A second CPU that controls to select and output one of the seesaw signal and the MyMo signal separated from the second analog optical module according to the operator's request; a second high-frequency converter that converts a seesaw signal or mymo signal in the form of an analog optical signal input from the second analog optical module into a high-frequency signal; And a second ultra-high frequency antenna unit that converts the seesaw signal or MyMo signal in the form of an analog optical signal input from the second high-frequency converter into an ultra-high frequency signal and transmits it to the user terminal located in the corresponding service area. Do it as

The 5th generation relay device supporting the active MIMO service of the third embodiment according to the present invention for achieving the above object includes a base station connecting a network and service units for wireless communication services; A donor unit that receives a high-frequency seesaw signal and a mymo signal from the base station, converts them into a medium-frequency signal form, and outputs them; And the service units receive a seesaw signal and a mymo signal in the form of an intermediate frequency signal from the donor unit and selectively transmit one of them to the user terminals.

In addition, the donor unit includes a first ultra-high frequency antenna unit that transmits and receives signals to and from the base station through an antenna; A first high-frequency converter that converts the high-frequency seesaw signal and Mymo signal input from the ultra-high frequency antenna unit into an intermediate frequency signal form; And a first intermediate frequency converter that converts the intermediate frequency signal input from the first high frequency converter into a seesaw signal and a mymo signal in the form of a secondary intermediate frequency signal and outputs them to the service units.

In addition, the service unit includes a second intermediate frequency converter that selects and outputs one of a seesaw signal and a mymo signal in the form of an intermediate frequency signal input from the donor unit; A second CPU that controls to select and output one of the seesaw signal and the MyMo signal separated from the second intermediate frequency converter according to the operator's request; A second high-frequency converter that converts a seesaw signal or Mymo signal in the form of an intermediate frequency signal input from the second intermediate frequency converter into a high-frequency signal; And a second ultra-high frequency antenna unit that converts the seesaw signal or MyMo signal in the form of an intermediate frequency signal input from the second high frequency converter into an ultra-high frequency signal and transmits it to the user terminal located in the corresponding service area. Do it as

The present invention allows the operator to selectively output a seesaw signal or a MyMo signal from a 5th generation NR (New Radio) repeater including a donor unit and a service unit connected by an optical cable or a coaxial cable, thereby dispersing traffic. , has the effect of improving data transmission speed.

Figure 1 is a block diagram of a 5th generation repeater device according to the prior art.
Figures 2a and 2b are block diagrams of a 5th generation relay device supporting active MIMO service according to the first embodiment of the present invention.
FIG. 2C is a detailed block diagram of the donor unit and service unit in FIGS. 2A and 2B.
Figures 3a and 3b are block diagrams of a 5th generation relay device supporting active MIMO service according to the second embodiment of the present invention.
FIG. 3C is a detailed block diagram of the donor unit and service unit in FIGS. 3A and 3B.
Figures 4a and 4b are block diagrams of a 5th generation relay device supporting active MIMO service according to a third embodiment of the present invention.
FIG. 4C is a detailed block diagram of the donor unit and service unit in FIGS. 4A and 4B.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. First, it should be noted that when adding reference numerals to components in each drawing, the same components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, in describing the present invention, if a detailed description of a related known configuration or function is determined to be obvious to those skilled in the art or may obscure the gist of the present invention, the detailed description will be omitted.

Figures 2A and 2B are block diagrams of a 5th generation relay device supporting active MIMO service according to the first embodiment of the present invention, and Figure 2C is a detailed block diagram of the donor unit and service unit in Figures 2A and 2B. .

Referring to FIGS. 2A to 2C, the 5th generation relay device supporting the active MIMO service according to the first embodiment of the present invention includes a base station 110, a donor unit (DU) 120, and a service unit ( SU: Service Unit) (130A-130N) and a user terminal (140).

The operation of the 5th generation relay device supporting the active MIMO service according to the first embodiment of the present invention configured as described above will be described as follows.

The base station 110 serves to connect the network and service units 130A-130N for wireless communication services.

The donor unit 120 receives a high-frequency (RF) seesaw signal (SISO) and a MIMO signal (MIMO) from the base station 110, converts them into digital optical signals, and transmits them to the service unit (130A) through the transmission line (TL). -130N) side output. Here, the transmission line TL will be explained by taking an optical line as an example.

For this purpose, the donor unit 120 includes a first ultra-high frequency antenna unit 121, a first high frequency converter 122, a first data transmission unit (DTU: Data Transmission Unit) 123, and a first ultra-high frequency antenna unit 120, as shown in FIG. 2C. It includes 1 CPU 124 and a first power supply unit 125.

The first ultra-high frequency antenna unit 121 transmits and receives signals to and from the base station 110 through an antenna. For example, the ultra-high frequency antenna unit 121 converts the seesaw signal (SISO) and MIMO signal of the ultra-high frequency (mmWave) received from the base station 110 into a high frequency (RF) signal and transmits the first high frequency (RF) signal. The seesaw signal (SISO) and MIMO signal of high frequency (RF) output to the converter 122 or input from the first high frequency converter 122 are converted into signals of ultra-high frequency (mmWave) to the base station 110. send to

The first high-frequency converter 122 converts the seesaw signal (SISO) and MIMO signal of the high frequency (RF) input from the ultra-high frequency antenna unit 121 into a baseband signal and converts the first data. The seesaw signal (SISO) and MIMO signal of the baseband output to the transmission unit (123A) or input from the first data transmission unit (123A) are converted into a high frequency (RF) signal to create a high frequency antenna. Output to unit 121.

The first data transmission unit 123 converts the seesaw signal (SISO) and MIMO signal of the baseband input from the high frequency converter 122 into a digital optical signal (Digital Optical) and provides a service unit ( 130A) or converts the seesaw signal (SISO) and MIMO signal in the form of a digital optical signal input from the service unit (130A) into a baseband signal and converts it to a high frequency converter (122). ) is output.

The first CPU 124 serves to control each part within the donor unit 120.

The first power supply unit 125 serves to supply power required for each part within the donor unit 120.

The service units (130A-130N) are each connected to the donor unit 120 through a transmission line (TL), and a seesaw signal (SISO) and a mymo signal in the form of a digital optical signal input from the donor unit 120 ( MIMO) is separated through a digital signal processing process, and one of them is selected according to the operator's request and transmitted (serviced) to the corresponding user terminal 140.

Since the service units (130A-130N) have the same configuration and operating principle, the service unit (130A) is described as an example among them as follows.

The service unit 130A receives a seesaw signal (SISO) and a MIMO signal in the form of a digital optical signal from the donor unit 120 and selectively serves one of them to the user terminal 140.

For this purpose, the service unit 130A includes a second data transmission unit (DTU: Data Transmission Unit) 131, a second high-frequency converter 132, a second ultra-high frequency antenna unit 133, a second CPU 134, and Includes a second power supply unit 135.

The second data transmission unit 131 performs a digital signal processing process on the seesaw signal (SISO) and MIMO signal in the form of a digital optical signal input from the first data transmission unit (123A) of the donor unit 120. Through this, the seesaw signal (SISO) and the MIMO signal are separated.

According to the operator's request, the second CPU 134 controls to select and output one of the seesaw signal (SISO) and the MIMO signal separated from the second data transmission unit (131A). In addition, the second CPU plays the role of controlling each part within the service unit (130A).

The second high frequency converter 132 converts the digital seesaw signal (SISO) or MIMO signal input from the second data transmission unit 131 into a high frequency (RF) signal and transmits it to the second ultra high frequency antenna. Output to unit 133.

The second ultra-high frequency antenna unit 133 converts the high-frequency (RF) seesaw signal (SISO) or MIMO signal (MIMO) input from the second high-frequency converter 132 into an ultra-high frequency (mmWave) signal and transmits the corresponding The service is provided to the user terminal 140 located in the service area. At this time, the second ultra-high frequency antenna unit 133 may transmit a seesaw signal (SISO) or MIMO signal in the ultra-high frequency (mmWave) band through beamforming.

The second power supply unit 135 serves to supply power required for each part within the service unit 130A.

Figure 2a shows that among the service units (130A-130N), the second service unit (130B) services MIMO signal (MIMO) to the user terminal 140 located in the corresponding service area through the same path as above, and the remaining services The units 130A, 130C-130N show an example of servicing a seesaw signal (SISO) to user terminals 140 located in the corresponding service area.

Accordingly, a two-layer type active MIMO service is provided to the user terminal 140 located in an area where the service area of the service unit 130A and the service area of the service unit 130B overlap. can be provided. By doing this, the throughput of the service unit can be increased and the data traffic processing speed can be improved.

In comparison, Figure 2b shows an example in which service units 130A-130N uniformly provide seesaw (SISO) service in the ultra-high frequency (mmWave) band to user terminals 140 located in the corresponding service area.

Figures 3a and 3b are block diagrams of a 5th generation relay device supporting active MIMO service according to the second embodiment of the present invention, and Figure 3c is a detailed block diagram of the donor unit and service unit in Figures 3a and 3b. .

Referring to FIGS. 3A to 3C, the 5th generation relay device supporting the active MIMO service according to the second embodiment of the present invention includes a base station 210, a donor unit (DU) 220, and a service unit ( SU: Service Unit) (230A-230N) and a user terminal (240).

The operation of the 5th generation relay device supporting the active MIMO service according to the second embodiment of the present invention configured as described above will be described as follows.

The donor unit 220 receives a high-frequency (RF) seesaw signal (SISO) and a MIMO signal (MIMO) from the base station 210, converts them into analog optical signals, and transmits them to the service unit (230A-) through the transmission line (TL). 230N). Here, the transmission line TL will be explained by taking an optical line as an example.

The service units (230A-230N) receive a seesaw signal (SISO) and a MIMO signal in the form of an analog optical signal from the donor unit 220 and selectively transmit one of them to the user terminal 140 ( service).

Compared to the first embodiment of the present invention, the second embodiment of the present invention is a seesaw signal ( The difference is that in order to analogically separate the SISO and MIMO signals, they are each transmitted at different optical wavelengths (e.g., SISO:λ1, MIMO:λ2).

As shown in FIG. 3C, the donor unit 220 includes a first ultra-high frequency antenna unit 221, a first high-frequency converter 222, a first analog optical module 223, a first CPU 224, and a first power supply unit. Includes (225). Here, the parts related to the above differences are explained as follows.

The first high frequency converter 222 converts the seesaw signal (SISO) and MIMO signal of the high frequency (RF) input from the ultra high frequency antenna unit 221 into the form of an intermediate frequency signal (IF).

The first analog optical module 223 converts the seesaw signal (SISO) and MIMO signal in the form of an intermediate frequency signal (IF) input from the first high frequency converter 222 into an analog optical signal and provides a service unit ( 230A-230N) side.

Since the service units (230A-230N) have the same configuration and operating principle, the service unit (130A) is described as an example among them as follows.

The service unit 230A receives a seesaw signal (SISO) and a MIMO signal in the form of an analog optical signal from the donor unit 220 and selectively serves one of them to the user terminal 240.

For this purpose, the service unit 230A includes a second analog optical module 231, a second high frequency converter 232, a second ultra high frequency antenna unit 233, a second CPU 234, and a second power supply unit 235. Includes. Here, the parts related to the above differences are explained as follows.

The second analog optical module 231 selects one of the analog separated seesaw signal (SISO) and the MIMO signal input from the first analog optical module 223 and converts it to a second high frequency converter (232). ) is output.

Figures 4a and 4b are block diagrams of a 5th generation relay device supporting active MIMO service according to a third embodiment of the present invention, and Figure 4c is a detailed block diagram of the donor unit and service unit in Figures 4a and 4b. .

Referring to FIGS. 4A to 4C, the 5th generation relay device supporting active MIMO service according to the third embodiment of the present invention includes a base station 310, a donor unit (DU) 320, and a service unit ( SU: Service Unit) (330A-330N) and a user terminal (340).

The operation of the 5th generation relay device supporting the active MIMO service according to the third embodiment of the present invention configured as described above will be described as follows.

The donor unit 320 receives the high-frequency (RF) seesaw signal (SISO) and MIMO signal (MIMO) from the base station 310, converts them into intermediate frequency signals (IF1, IF2), and transmits them to the transmission line (TL). It is transmitted to the service unit (330A-330N) through . Here, the transmission line TL will be explained by taking an optical line as an example.

The service units (330A-330N) receive a seesaw signal (SISO) and a MIMO signal (MIMO) in the form of intermediate frequency signals (IF1, IF2) from the donor unit 320 and selectively send one of them to the user terminal ( 140) is transmitted (serviced).

Compared to the first embodiment of the present invention, the third embodiment of the present invention is that the donor unit 320 uses different intermediate frequency signals (e.g. , the difference is that it is transmitted in the form of SISO: IF1, MIMO: IF2).

As shown in FIG. 4C, the donor unit 320 includes a first ultra-high frequency antenna unit 321, a first high frequency converter 322, a first intermediate frequency converter 323, a first CPU 324, and a first power supply unit. Includes (325). Here, the parts related to the above differences are explained as follows.

The first high frequency converter 322 converts the seesaw signal (SISO) and MIMO signal of the high frequency (RF) input from the ultra-high frequency antenna unit 121 into the form of an intermediate frequency signal (IF).

The first intermediate frequency converter 323 converts the intermediate frequency signal (IF) input from the first high frequency converter 322 into a seesaw signal (SISO) and a MIMO signal in the form of secondary intermediate frequency signals (IF1 and IF2). ) and output them to the service unit (330A-330N).

Since the service units 330A-330N have the same configuration and operating principle, the service unit 330A will be described as an example as follows.

The service unit 330A receives a seesaw signal (SISO) and a MIMO signal (MIMO) in the form of intermediate frequency signals (IF1, IF2) from the donor unit 320 and selectively transmits one of them to the user terminal 340. Transmit (service) to.

For this purpose, the service unit 330A includes a second intermediate frequency (IF) converter 331, a second high frequency converter 332, a second ultra-high frequency antenna unit 333, a second CPU 334, and a second power supply unit. Includes (335). Here, the parts related to the above differences are explained as follows.

The second intermediate frequency converter 331 selects one of the seesaw signal (SISO) and the MIMO signal (MIMO) in the form of intermediate frequency signals (IF1 and IF2) received from the first intermediate frequency converter (323). 2Output to high frequency converter (332).

Although the preferred embodiments have been described and illustrated above to illustrate the technical idea of the present invention, the present invention is not limited to the configuration and operation as shown and described, and does not depart from the scope of the technical idea. Those skilled in the art will appreciate that many changes and modifications are possible to the present invention. Accordingly, all such appropriate changes, modifications and equivalents shall be considered to fall within the scope of the present invention.

110,210,310: Base station
121,221,321: Ultra-high frequency antenna unit
122,222,322: 1st high frequency converter
123: first data transmission unit
120,220,320: Donor unit
130A-130N, 230A-230N, 330A-330N: Service unit
131: Second data transmission unit
132,232,332: 2nd high frequency converter
133,233,333: 2nd ultra-high frequency antenna unit
140: user terminal
223: 1st analog optical module
231: 2nd analog optical module
323: 1st intermediate frequency converter
331: Second intermediate frequency converter

Claims (9)

A base station connecting networks and service units for wireless communication services;
A donor unit that wirelessly receives high-frequency seesaw signals and MyMo signals from the base station, converts them into digital optical signals, and outputs them; and
The service units input a seesaw signal and a MIMO signal in the form of a digital optical signal from the donor unit and selectively transmit one of them to the user terminal. A 5th generation relay device supporting an active MIMO service including a. According to paragraph 1,
The donor unit is,
A first ultra-high frequency antenna unit that transmits and receives signals to and from the base station through an antenna;
A first high-frequency converter that converts the high-frequency seesaw signal and Mymo signal input from the ultra-high frequency antenna unit into a baseband signal and outputs it; and
A first data transmission unit that converts the baseband seesaw signal and MyMo signal input from the first high frequency converter into a digital optical signal and outputs it to the service units; Supporting an active MIMO service, comprising a. 5th generation repeater device. According to paragraph 1,
The service unit is,
A second data transmission unit that separates the seesaw signal and MyMo signal in the form of a digital optical signal input from the donor unit into the seesaw signal and MyMo signal through a digital signal processing process;
A second CPU that controls to select and output one of the seesaw signal and the Mymo signal separated from the second data transmission unit at the request of the operator;
a second high-frequency converter that converts the digital seesaw signal or mymo signal input from the second data transmission unit into a high-frequency signal; and
A second ultra-high frequency antenna unit that converts the high-frequency seesaw signal or MyMo signal input from the second high-frequency converter into ultra-high frequency and transmits it to the user terminal located in the service area. An active MIMO service comprising a. 5th generation repeater device that supports . A base station connecting networks and service units for wireless communication services;
A donor unit that receives high-frequency seesaw signals and MyMo signals from the base station, converts them into analog optical signals, and outputs them; and
The service units receive a seesaw signal and a MIMO signal in the form of an analog optical signal from the donor unit and selectively transmit one of them to the user terminal. A 5th generation relay device supporting an active MIMO service including a. According to clause 4,
The donor unit is,
A first ultra-high frequency antenna unit that transmits and receives signals to and from the base station through an antenna;
A first high-frequency converter that converts the high-frequency seesaw signal and Mymo signal input from the ultra-high frequency antenna unit into an intermediate frequency signal; and
An active MIMO service comprising a first analog optical module that converts a seesaw signal and a MIMO signal in the form of an intermediate frequency signal input from the first high frequency converter into an analog optical signal and outputs it to the service units. 5th generation repeater device that supports . According to clause 4,
The service unit is
a second analog optical module that selects and outputs one of the analog-separated seesaw signal and the mymo signal received from the donor unit;
A second CPU that controls to select and output one of the seesaw signal and the MyMo signal separated from the second analog optical module according to the operator's request;
a second high-frequency converter that converts a seesaw signal or mymo signal in the form of an analog optical signal input from the second analog optical module into a high-frequency signal; and
A second ultra-high frequency antenna unit that converts the seesaw signal or MyMo signal in the form of an analog optical signal input from the second high-frequency converter into an ultra-high frequency signal and transmits it to the user terminal located in the corresponding service area; characterized by comprising a. A 5th generation relay device that supports active MIMO service. A base station connecting networks and service units for wireless communication services;
A donor unit that receives a high-frequency seesaw signal and a MyMo signal from the base station, converts them into intermediate frequency signals, and outputs them; and
The service units receive a seesaw signal and a MyMo signal in the form of an intermediate frequency signal from the donor unit and selectively transmit one of them to the user terminals; 5th generation relay supporting an active MyMo service including Device. In clause 7,
The donor unit is,
A first ultra-high frequency antenna unit that transmits and receives signals to and from the base station through an antenna;
A first high-frequency converter that converts the high-frequency seesaw signal and Mymo signal input from the ultra-high frequency antenna unit into an intermediate frequency signal; and
A first intermediate frequency converter that converts the intermediate frequency signal input from the first high frequency converter into a seesaw signal and a MIMO signal of a second intermediate frequency and outputs them to the service units. Active MIMO service comprising a. 5th generation repeater device that supports . In clause 7,
The service unit is,
A second intermediate frequency converter that selects and outputs one of a seesaw signal and a mymo signal in the form of an intermediate frequency signal input from the donor unit;
A second CPU that controls to select and output one of the seesaw signal and the MyMo signal separated from the second intermediate frequency converter according to the operator's request;
A second high-frequency converter that converts a seesaw signal or Mymo signal in the form of an intermediate frequency signal input from the second intermediate frequency converter into a high-frequency signal; and
A second ultra-high frequency antenna unit that converts the seesaw signal or MyMo signal in the form of an intermediate frequency signal input from the second high frequency converter into an ultra-high frequency signal and transmits it to the user terminal located in the corresponding service area. A 5th generation relay device that supports active MIMO service.

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