KR20240092555A - 5th generation repeater and its operating method - Google Patents

Abstract

The present invention discloses relay technology for a 5th generation relay device. In the present invention, when performing a relay service for a user terminal through a 5th generation relay device, if the service distance to the user terminal is shorter than the standard value due to insufficient effective isotropic radiation power of the service unit, a polarized antenna array prepared in advance is used to Includes service units that increase service distance.

Description

5th generation repeater and its operating method {5th generation repeater and its operating method}

The present invention relates to relay technology for 5th generation relay devices. More specifically, when the effective isotropically radiated power (EIRP) of the service unit is insufficient and the service distance to the user terminal is short, the antenna array is increased to provide service. This relates to a 5th generation repeater that can improve distance and its driving method.

Fifth generation (5G) mobile communication is a recently adopted wireless network technology. 5G relay systems are being 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, multiple input multi output (MIMO), and single input/output (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: Donor Unit) and the remote unit (RU: Remote Unit) are connected to each other through a transmission line, and optical/coaxial/UTP (Unshielded Twisted Pair), etc. can be used as the transmission line. there is.

Figure 1 is a block diagram of a 5th generation repeater device according to the prior art.

Referring to FIG. 1, the 5th generation relay device according to the prior art includes a donor unit (DU) (10), an optical line (20), a service unit (SU) (30), and a user terminal (UE: User Equipment) (40).

The donor unit 10 converts the relay signal in the high frequency (RF) band received from the base station into an optical signal and transmits it to the service unit 30 through the optical line 20.

The service unit 30 transmits the relay signal received from the donor unit 10 through the optical path 20 to the user terminal 40 in ultra-high frequency (mmWave), using a SISO beam through a 2×2 polarized antenna array. and forms a MIMO beam through another 2×2 polarized antenna array.

However, due to the ultra-high frequency (mmWave) characteristics transmitted from the service unit 30 to the user terminal 40, the 5G signal is not sufficiently transmitted to the target distance, so service coverage is very limited. Moreover, when a communication obstacle 50 exists between the service unit 30 and the user terminal 40, the signal strength is reduced due to low transmittance of the reflective material.

For this reason, when using a 5th generation relay device according to the prior art, the service distance is not sufficiently secured, which causes a problem in that the quality of relay service deteriorates.

The problem that the present invention aims to solve is that when performing a relay service for a user terminal through a 5th generation relay device, if the service distance to the user terminal is shorter than the standard value due to a lack of effective isotropic radiated power of the service unit, the previously prepared polarization The aim is to provide a 5th generation relay device and its driving method that can increase service distance using an antenna array.

A 5th generation relay device according to the present invention for achieving the above object includes a donor unit that receives a relay signal in a high frequency band received from a base station; And a service unit that forms a seesaw beam or MyMo beam in order to transmit the relay signal to the user terminal as an ultra-high frequency seesaw signal or MyMo signal. first to third polarized antenna arrays each polarized at an angle; a divider that distributes the seesaw signal into two paths and outputs them; a first beamformer that beamforms a seesaw signal output through one path of the distributor and supplies the beamforming signal to the first polarized antenna array; A switch for switching the seesaw signal output to the other path of the distributor and the MyMo signal input through a separate path; A second beamformer that beamforms the MyMo signal or seesaw signal output through the switch; And a switch unit for switching the MIMO signal or seesaw signal input from the second beamformer and selectively supplying it to the second polarization antenna array or the third polarization antenna array.

In addition, the first polarization antenna array and the second polarization antenna array transmit the seesaw signal by polarizing it by -45 degrees, and the third polarization antenna array polarizes the Mymo signal by +45 degrees and transmits it. .

In addition, the first to third polarized antenna arrays are characterized in that patches are arranged in a 2×2 shape.

In addition, the switching operation mode of the switch and the switch unit is characterized in that it is controlled by a control unit inside the service unit.

In addition, the control unit is characterized in that it controls the switching operation mode of the switch and the switch unit based on the strength of the signal received from the user terminal.

In addition, the switching operation mode of the switch and the switch unit is characterized in that it is manually set by the administrator.

A method of driving a 5th generation relay device according to the present invention to achieve the above object includes a donor unit that receives a relay signal in a high frequency band received from a base station; A service unit that forms a seesaw beam or MyMo beam to transmit the relay signal to the user terminal as an ultra-high frequency seesaw signal or MyMo signal; and first to third polarized antenna arrays that respectively polarize the seesaw signal or myo signal at a predesigned angle. In the method of driving a 5th generation relay device that relays the relay signal, a distributor divides the seesaw signal into two Distributing and outputting through paths; A first beamformer beamforming a seesaw signal output from one path of the distributor and supplying the beamforming signal to the first polarization antenna array; A switch switching the seesaw signal output to the other path of the distributor and the MyMo signal input through a separate path; A second beamformer performing beamforming processing on the MyMo signal or seesaw signal output through the switch; And a switch unit switching the MyMo signal or seesaw signal input from the second beamformer and selectively supplying it to the second polarization antenna array or the third polarization antenna array.

The 5th generation relay device and its driving method according to the present invention perform relay services by forming seesaw beams and mymo beams in normal times when performing relay services for user terminals, and when the effective isotropic radiated power of the service unit is insufficient, If the service distance to the user terminal is shorter than the standard value, the service distance is increased using a pre-prepared polarized antenna array, which has the effect of always providing high-quality relay service without being affected by communication obstacles.

Figure 1 is a block diagram of a 5th generation repeater device according to the prior art.
Figures 2a and 2b are overall block diagrams of the 5th generation repeater device according to the present invention.
This is a block diagram showing system services.
Figure 3 is a detailed block diagram of a service unit in a 5th generation relay device according to the present invention.
Figure 4 is a flowchart of a method of driving a 5th generation repeater device according to the present invention.

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.

Figure 2a is a block diagram showing relay service by forming a SISO beam and a MIMO beam in the service unit of the 5th generation relay device according to the present invention, and Figure 2b is a relay service by forming a SISO beam twice in the service unit according to the present invention. This is a block diagram showing service.

Referring to FIGS. 2A and 2B, the 5th generation relay device according to the present invention includes a donor unit (DU) 110, an optical line 120, a service unit (SU) 30, and a user terminal. (UE: User Equipment) (40).

The operation of the 5th generation relay device according to the present invention configured as described above will be described as follows.

The donor unit 110 converts the relay signal in the high frequency (RF) band received from the base station into an optical signal and transmits it to the service unit 130 through the optical line 120.

In order to transmit the relay signal received from the donor unit 110 through the optical line 120 to the user terminal 140 at ultra-high frequency (mmWave), the service unit 130 uses 2× as shown in FIG. 2A in normal mode. A SISO beam is formed through a 2-polarized antenna array, and a MIMO beam is formed through another 2×2 polarized antenna array.

However, if the effective isotropically radiated power (EIRP) of the service unit 130 is insufficient and the service distance to the user terminal 140 is shorter than the target value, a seesaw beam is formed through a 2×2 polarized antenna array. And, a seesaw beam is also formed through another 2×2 polarized antenna array.

Accordingly, the intensity of the seesaw beam is doubled compared to FIG. 2A as shown in FIG. 2B. Due to this, smooth relay is possible even when a communication obstacle exists between the service unit 130 and the user terminal 140.

Figure 3 is a block diagram for selectively forming a SISO beam and a MIMO beam depending on whether or not there is a communication failure in the service unit of the 5th generation repeater according to the present invention.

Referring to Figure 3, the service unit of the 5th generation repeater according to the present invention includes first to third polarization antenna arrays (131A-131C), divider (132), first beamformer (133), and switch (134). ), a second beamformer 135, and a switch unit 136.

The operation of the service unit according to the present invention configured as described above will be described in detail as follows.

The first to third polarization antenna arrays 131A-131C are disposed in the service unit 130, and these can be used to form a seesaw beam (SISO Beam) or a MIMO Beam.

For example, the first polarization antenna array 131A is a polarization antenna array with a polarization angle of -45 degrees and forms a seesaw beam. For example, the second polarized antenna array 131B is a polarized antenna array with a polarization angle of -45 degrees and forms a seesaw beam. For example, the third polarization antenna array 131C is a polarization antenna array with a polarization angle of +45 degrees and forms a MIMO beam.

The polarization angle of the first to third polarization antenna arrays 131A-131C is not fixed to the above angle, but may be any one of ±45 degrees or ±90 degrees. The first to third polarized antenna arrays 131A-131C will be described using an example in which patches are arranged in a 2×2 shape in the horizontal and vertical directions.

Normally, that is, when there is no communication obstacle between the service unit 130 and the user terminal 140, the service unit 130 forms a seesaw beam and a MIMO beam as shown in Figure 2a. do.

At this time, the ultra-high frequency seesaw signal (mmWave_SISO) is supplied to the first beamformer 133 through the distributor 132. The first beamformer 133 processes the received seesaw signal into beamforming and outputs it to the first polarization antenna array 131A. That is, the first beamformer 133 compensates for the variable time delay for each converter according to the position to focus on the received seesaw signal, processes it in a synthesized form, and outputs it to the first polarization antenna array 131A.

In addition, the ultra-high frequency MIMO signal (mmWave_MIMO) is supplied to the second beamformer 135 through the switch 134. The second beamformer 133 processes the received MIMO signal (mmWave_MIMO) by beamforming. That is, the second beamformer 133 compensates for the variable time delay for each converter according to the location to focus on the received MIMO signal (mmWave_MIMO) and processes it in a synthesized form. The signal processed as above is output to the second polarization antenna array 131B through the switches SW1-SW4 of the switch unit 136.

Accordingly, a SISO beam and a MIMO beam are formed by the first polarization antenna array 131A and the second polarization antenna array 131B, as shown in FIG. 2A.

Meanwhile, when a communication obstacle exists between the service unit 130 and the user terminal 140, the service unit 130 generates the strength of the SISO beam to be twice as large as usual, as shown in FIG. 2b. . At this time, the service unit 130 does not form a MIMO beam.

At this time, the seesaw signal (mmWave_SISO) is distributed into two paths through the distributor 132 as described above, and one of them is supplied to the first beamformer 133. The first beamformer 133 compensates for the variable time delay for each converter according to the position to be focused on for the received seesaw signal, processes it in a synthesized form, and outputs it to the first polarization antenna array 131A.

At this time, among the seesaw signals (mmWave_SISO) distributed into two paths through the distributor 132, the other one is supplied to the second beamformer 135 through the switch 134. The second beamformer 133 compensates for the variable time delay for each converter according to the location to focus on the received seesaw signal (mmWave_SISO) and processes it in a synthesized form. The signal processed as above is output to the third polarization antenna array 131C through the switches SW1-SW4 of the switch unit 136.

Accordingly, as shown in FIG. 2B, a seesaw beam whose intensity is about twice as large as that of FIG. 2A is formed by the first polarized antenna array 131A and the third polarized antenna array 131C.

Accordingly, even if a communication obstacle exists between the service unit 130 and the user terminal 140 as described above, communication between them is performed smoothly.

As described above, the service unit 130 checks whether a communication obstacle exists between the user terminal 140 and controls the switching operation mode of the switch 134 and the switch unit 136 as described above. There can be many ways.

For example, if the control unit (not shown in the figure) of the service unit 130 analyzes the signal received from the user terminal 140 and determines that the signal strength is above a certain level, a seesaw beam (SISO Beam) as shown in Figure 2a. ) and the switching operation mode of the switch 134 and the switch unit 136 can be controlled so that a MIMO beam is formed. In addition, when the control unit analyzes the signal received from the user terminal 140 and determines that the signal strength is below a certain value, the switch 134 so that the strength of the SISO beam is doubled as shown in FIG. 2B. ) and the switching operation mode of the switch unit 136 can be controlled.

As another example, a relay device manager may set the switching operation mode to switch as described above based on information about the surrounding relay environment.

In the above description, when there is a communication obstacle between the service unit 130 and the user terminal 140, the MIMO beam is omitted and the strength of the SISO beam is doubled. However, the present invention does this. It is not limited.

As another example, if a communication obstacle exists between the service unit 130 and the user terminal 140 as described above, the SISO Beam may be omitted and the intensity of the MIMO Beam may be doubled. You can.

Meanwhile, Figure 4 is a flowchart of a method of driving a 5th generation relay device according to the present invention.

Referring to Figure 4, the method of driving a 5th generation relay device according to the present invention includes the steps of distributing a seesaw signal (S1), beamforming the distributed seesaw signal (S2), and switching the seesaw signal and the MyMo signal. (S3), a step of beamforming the switched seesaw signal or MyMo signal (S4), and a step of switching the beamformed seesaw signal or MyMo signal (S5). The driving method of the 5th generation relay device of the present invention will be described with reference to FIGS. 2A, 2B, and 3 as follows.

In the seesaw signal distribution step (S1), the distributor 132 distributes the seesaw signal (mmWave_SISO) into two paths and outputs them.

In the seesaw signal beamforming step (S2), the first beamformer 133 beamforms the seesaw signal (mmWave_SISO) output through one path of the distributor 132 and supplies it to the first polarized antenna array 131A. .

In the seesaw signal/MIMO signal switching step (S3), the switch 134 switches the seesaw signal (mmWave_SISO) output to the other path of the distributor 132 and the MIMO signal (mmWave_MIMO) input through a separate path. .

In the MIMO signal/seesaw signal beamforming step (S4), the second beamformer 135 beamforms the MIMO signal (mmWave_MIMO) or seesaw signal (mmWave_SISO) output through the switch 134.

In the beamformed signal switching step (S5), the switch unit 136 switches the beamformed MyMo signal or seesaw signal input from the second beamformer 135 to the second polarized antenna array 131B or It is selectively supplied to the third polarized antenna array (131C).

Each of the above steps (S1-S5) is not performed in a specific order, but may be performed in an order appropriate for relaying.

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: donor unit 120: optical path
130: Service units 131A-131C: 1st to 3rd polarized antenna arrays
132: Distributor 133: First beamformer
134: switch 135: second beamformer
136: switch unit 140: user terminal

Claims (7)

A donor unit that receives a relay signal in a high frequency band received from a base station; and
In order to transmit the relay signal to the user terminal as an ultra-high frequency seesaw signal or MyMo signal, a service unit that forms a Seesaw beam or MyMo beam;
The service unit is
First to third polarization antenna arrays that respectively polarize the seesaw signal or myo signal at a pre-designed angle;
a divider that distributes the seesaw signal into two paths and outputs them;
a first beamformer that beamforms a seesaw signal output through one path of the distributor and supplies the beamforming signal to the first polarized antenna array;
A switch for switching the seesaw signal output to the other path of the distributor and the MyMo signal input through a separate path;
A second beamformer that beamforms the MyMo signal or seesaw signal output through the switch; and
A 5th generation relay device comprising a switch unit that switches the MIMO signal or seesaw signal input from the second beamformer and selectively supplies it to the second polarized antenna array or the third polarized antenna array. According to paragraph 1,
The first polarization antenna array and the second polarization antenna array transmit the seesaw signal by polarizing it by -45 degrees,
The third polarization antenna array is a 5th generation relay device, characterized in that the MIMO signal is polarized by +45 degrees and transmitted. According to paragraph 1,
The first to third polarized antenna arrays are
A 5th generation relay device characterized by patches arranged in a 2×2 shape. According to paragraph 1,
The switching operation mode of the switch and the switch unit is
A 5th generation relay device, characterized in that controlled by a control unit inside the service unit. According to paragraph 4,
The control unit
A 5th generation relay device characterized in that the switching operation mode of the switch and the switch unit is controlled based on the strength of the signal received from the user terminal. According to paragraph 1,
The switching operation mode of the switch and the switch unit is
A 5th generation relay device characterized in that it is manually set by an administrator. A donor unit that receives a relay signal in a high frequency band received from a base station; A service unit that forms a seesaw beam or MyMo beam to transmit the relay signal to the user terminal as an ultra-high frequency seesaw signal or MyMo signal; And first to third polarized antenna arrays that respectively polarize the seesaw signal or myo signal at a pre-designed angle. In the method of driving a 5th generation relay device that relays the relay signal,
A distributor distributing and outputting the seesaw signal into two paths;
A first beamformer beamforming a seesaw signal output through one path of the distributor and supplying the beamforming signal to the first polarization antenna array;
A switch switching the seesaw signal output to the other path of the distributor and the MyMo signal input through a separate path;
A second beamformer beamforming the mymo signal or seesaw signal output through the switch; and
A method of driving a 5th generation relay device comprising a step of switching the mymo signal or seesaw signal input from the second beamformer and selectively supplying it to the second polarization antenna array or the third polarization antenna array.

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