WO2012093814A2

WO2012093814A2 - Communication system for mitigating interference by relay in cell, base station and communication control method for base station

Info

Publication number: WO2012093814A2
Application number: PCT/KR2011/010357
Authority: WO
Inventors: 이정륜; 조용수; 허근행
Original assignee: 중앙대학교 산학협력단
Priority date: 2011-01-05
Filing date: 2011-12-30
Publication date: 2012-07-12
Also published as: KR20120079708A; KR101189002B1; WO2012093814A3

Abstract

Provided are a communication system for mitigating interference by a relay in a cell, a base station and a communication control method for the base station. The provided base station comprises: a reception unit which receives location information and/or wireless signal information from each of a plurality of terminals and one or more relays which are located within a cell region; and a frequency allocation unit which identifies an interference terminal, which communicates with the base station using a part of a first frequency band and causes interference with the one or more relays, among the plurality of terminals, and allocates another frequency band to the interference terminal, wherein the first frequency band is a frequency band used for communication between the one or more relays and terminals, and the identification of the interference terminal is achieved using location information and/or wireless signal information. According to the present invention, the interference between a base station and a relay link within a cell is efficiently reduced.

Description

Communication control method of communication system, base station and base station for interference mitigation by relay in cell

Embodiments of the present invention relate to a communication system, a base station, and a communication control method of a base station for interference mitigation by a relay in a cell, and more particularly, a cell for efficiently reducing interference between a base station and a repeater link in a cell. The present invention relates to a communication system, a base station and a communication control method of a base station for interference mitigation by a relay.

Recently, the standardization of 4G mobile communication is actively progressing, and the problem of intra-cell interference including a relay is a major issue in this field. Interference can occur between the link between the base station and the repeater terminal in the cell.

Referring to FIG. 1, the base station 110 performs direct communication with the first terminal 121 and the second terminal 123, and the repeater 130 and the third terminal 125 are linked with each other to perform communication. do.

Here, the proximity of the second terminal 123 and the repeater 130 when the second terminal 123 communicating with the base station 110 and the third terminal 125 communicating with the repeater 130 use the same frequency band. Interference may occur by

Referring to FIG. 2, a repeater frame structure of a non-transparent mode defined in 802.16j or 802.16m is illustrated. As in a typical OFDMA system, the horizontal axis represents time and the vertical axis represents a frequency band.

The repeater operating in the non-transparent mode receives data transmitted from the DL relay zone of the base station frame in the downlink (DL) relay zone of the repeater frame.

Subsequently, data received in the DL relay zone of the repeater frame is transmitted to the terminal in the DL access zone of the repeater frame. In case of a terminal directly communicating with a base station, data is transmitted from the base station in the DL access zone of the base station frame.

In other words, a node using the same time and frequency band in the DL access zone may be a plurality of repeaters disposed in the base station and the cell, which may cause interference between the base station and the repeater, the repeater and the relay period.

In order to solve the problems of the prior art as described above, the present invention provides a communication system, a base station and a base station communication control method for interference mitigation by the relay in the cell that can reduce the interference between the base station and the repeater link in the cell I would like to suggest.

According to a preferred embodiment of the present invention to achieve the above object, a base station comprising: a receiving unit for receiving at least one of the respective position information and radio signal information from a plurality of terminals and one or more repeaters located in the cell area; And a frequency allocation for communicating with the base station using a portion of a first frequency band of the plurality of terminals, identifying an interfering terminal where interference occurs by the one or more repeaters, and assigning another frequency band to the interfering terminal. The first frequency band is a frequency band used for communication between the one or more repeaters and the terminal, and the identification of the interference terminal is identified using at least one of the location information and wireless signal information. Can be.

The wireless signal information may include at least one of signal-to-interference information (SINR) and received signal strength of each of the plurality of terminals.

In addition, the frequency allocator communicates with the base station using the first frequency band among the plurality of terminals, selects a terminal having a value whose signal-to-interference information is lower than a threshold value, and location information of the selected terminal. And a terminal identification unit for identifying, as an interfering terminal, a terminal located near to the one or more repeaters among the selected terminals by using location information of each of the one or more repeaters.

Here, the second frequency band is defined as a band excluding the first frequency band among the frequency bands available to the base station and the terminal, and the frequency allocation unit is a frequency band that the interference terminal can use for the second frequency band. If there is, it may further comprise an allocator for allocating at least some of the usable frequency bands to the interfering terminal.

The allocation unit, when there is no frequency band available to the interference terminal in the second frequency band, the frequency band used by any one of the one or more terminals using the second frequency band and the interference terminal used The frequency band may be exchanged and allocated.

The frequency allocator may select one terminal among one or more terminals using the second frequency band by using location information of each of the plurality of terminals and the one or more repeaters.

The frequency allocation unit may further include: a signal-to-interference information predictor for predicting signal-to-interference information when each of the one or more terminals using the second frequency band uses a frequency band used by the interference terminal; A switching terminal selecting unit which selects any one of one or more terminals using the second frequency band by using the predicted signal-to-interference information; And a switching unit for exchanging a frequency band used by the selected terminal and a frequency band used by the interfering terminal.

The signal-to-interference information predicting unit selects at least one terminal from among one or more terminals using the second frequency band by using location information of each of the one or more terminals using the second frequency band, thereby generating the signal-to-interference information. Can be predicted.

The signal-to-interference information predicting unit may include one or more signals using the second frequency band by using location information and received signal strength of each of the one or more terminals using the second frequency band and location information of each of the one or more repeaters. Signal to interference information of each terminal can be predicted.

The switching terminal selecting unit may select a terminal having the largest value of the predicted signal-to-interference information among one or more terminals using the second frequency band, or the prediction among one or more terminals using the second frequency band. It is possible to select any one terminal whose signal-to-interference information has a value greater than or equal to a threshold.

In this case, the exchange unit may perform frequency band exchange when the predicted signal-to-interference information of the selected terminal is greater than the signal-to-interference information of the interfering terminal.

In addition, according to another embodiment of the present invention; One or more repeaters; And receiving at least one of respective position information and wireless signal information from the plurality of terminals and the at least one repeater, communicating using a portion of a first frequency band of the plurality of terminals, the interference being caused by the at least one repeater. And a base station for identifying the generated terminal as an interfering terminal and allocating a different frequency band to the identified interfering terminal, wherein the first frequency band is a frequency band used for communication between the repeater and the terminal. Is identified using at least one of the location information and the wireless signal information.

According to another embodiment of the present invention, there is provided a communication control method of a base station, the method comprising: receiving at least one of respective location information and wireless signal information from a plurality of terminals and one or more repeaters located in a cell area; Identifying an interfering terminal using a portion of a first frequency band of terminals directly communicating with the base station using the location information and the radio signal information and having interference caused by the one or more repeaters; And assigning another frequency band to the interfering terminal, wherein the first frequency band is a frequency band used for communication between the repeater and the terminal.

According to the present invention, it is possible to effectively reduce the interference between the base station and the repeater link in the cell.

1 is a diagram illustrating a schematic configuration of a communication system including a base station, a repeater, and a terminal in a cell.

2 is a frame structure of a base station and a repeater in a cell.

3 is a block diagram showing a detailed configuration of a base station according to an embodiment of the present invention.

4 is a diagram illustrating a frequency band for communication between a base station, a terminal, a repeater, and a terminal according to an embodiment of the present invention.

5 is a block diagram showing a detailed configuration of a frequency allocation unit according to an embodiment of the present invention.

6 is a diagram illustrating a schematic configuration of a communication system including a base station, a repeater, and a terminal in a cell according to an embodiment of the present invention.

7 is a diagram illustrating an example in which interference occurs in a terminal by a repeater according to an embodiment of the present invention.

7 is a frame structure of a base station and a repeater for explaining an example where interference occurs in a terminal by a repeater according to an embodiment of the present invention.

8 is a frame structure of a base station and a repeater for explaining an example of a process of exchanging frequency bands according to an embodiment of the present invention. 9 is a flowchart illustrating the overall flow of a communication control method of a base station according to an embodiment of the present invention.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the drawings, similar reference numerals are used for similar elements. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 3, the base station 300 according to an embodiment of the present invention includes a receiver 310 and a frequency allocator 320. Hereinafter, the function of each component will be described in detail.

The receiver 310 performs wireless communication with a plurality of terminals and at least one repeater. That is, the receiver 310 receives at least one of location information and wireless signal information from a plurality of terminals and at least one or more repeaters. In this case, the wireless signal information may be a data signal including data, or may be a specific message described below.

The frequency allocator 320 allocates frequencies available to a plurality of terminals and repeaters.

According to an exemplary embodiment of the present invention, the frequency allocator 320 may change the frequency band of the specific terminal in which the interference has occurred.

For example, the frequency allocator 320 communicates with the base station 300 by using a part of the first frequency band among the plurality of terminals, and the interference terminal having interference from at least one repeater among the plurality of repeaters. Select and assign another frequency band to the interfering terminal.

Here, the first frequency band means a frequency band used for communication between the repeater and the terminal. Hereinafter, the first frequency band will be described with reference to FIG. 4.

Referring to FIG. 4A, a frequency band usable by the base station 300 is divided into a first frequency band (region B) and a second frequency band (region A).

Here, the first frequency band is an area B allocated for communication between the repeater and the terminal, and the second frequency band is an area A except for the first frequency band among the frequency bands available for the base station 300 and the terminal. do.

That is, all the bands may be used for communication between the base station 300 and the terminal without limitation of the frequency band, but only the first frequency band may be used for communication between the repeater and the terminal.

Referring to FIG. 4B, data is transmitted to a terminal using a first frequency band (region B) in a DL access zone of a repeater frame.

As such, although the frequency band for transmitting the downlink data of the repeater and the terminal is limited to the first frequency band, the repeater transmits data through the resources allocated between the base station 300 and the repeater in the DL relay zone of the repeater frame. The data received from 300 can be sufficiently transmitted to the terminal.

In addition, the reason for enabling both the first and second frequency bands without limiting the resources available to the base station 300 to the second frequency band is to prevent the efficiency degradation caused by limiting the frequency band. .

Referring to FIG. 2 again, the base station 300 will be described.

The receiver 310 receives location information and wireless signal information of each of the plurality of terminals from the plurality of terminals within the cell area of the base station 300. It also receives location information of each of the one or more repeaters from the one or more repeaters.

In addition, the receiver 310 may receive at least one of location information and wireless signal information from at least one of a plurality of terminals and at least one repeater by a request of a periodic, aperiodic or base station 300.

Here, the wireless signal information may include one of signal-to-interference information (SINR) and received signal strength of each of the plurality of terminals.

Signal-to-Interference plus Noise Ratio (SINR) refers to signal-to-interference and noise ratio, and a terminal having a signal-to-interference information lower than a preset threshold may be determined as an interference occurring terminal. .

In an embodiment of the present invention, when the signal-to-interference information of the terminal is lower than the threshold and the terminal uses the first frequency band, it may be determined that the interference occurs due to the influence of the repeater.

Received signal strength refers to the strength of the communication signal between the base station 300 and the terminal, it can be used in the prediction of signal-to-interference information of the terminal.

The frequency allocator 320 interferes with a terminal whose signal-to-interference information is lower than a threshold among terminals communicating with the base station 300 using a part of the first frequency band by using the location information and the radio signal information of the plurality of terminals. Identifies by terminal.

In more detail, the base station 300 has a signal-to-interference information having a value lower than a threshold using signal-to-interference information received from a plurality of terminals communicating with the base station 300 using the first frequency band. Identifies the terminal.

Thereafter, it is confirmed using the location information of the identified terminal and the repeater whether there is a repeater in the vicinity of the identified terminal. If there is a repeater in the vicinity, it is determined that the signal-to-interference information of the identified terminal is low due to the interference by the repeater. In this case, the frequency allocator 320 allocates a new frequency band to the terminal under interference.

If there is a frequency band not allocated to the plurality of terminals in the second frequency band, the frequency allocator 320 allocates it to the interfering terminal.

However, if all of the second frequency band is being used for communication between the base station 300 and the terminal, the frequency allocation unit 320 is the frequency band and the interference terminal used by any one of the plurality of terminals using the second frequency band. Swap the frequency band used.

Referring to FIG. 5, the frequency allocator 320 includes a terminal identifier 510, an allocator 520, a signal-to-interference information predictor 530, an exchange terminal selector 540, and an exchange 550. It may include. Hereinafter, the function of each component will be described in detail.

The terminal identification unit 510 communicates with the base station 300 by using a part of the first frequency band among the plurality of terminals, and identifies the terminal having interference by the repeater as an interfering terminal.

Here, the interference of the terminal by the repeater may occur when the terminal that communicates with the base station 300 by using a part of the first frequency band is in a position close to the repeater.

That is, the terminal identification unit 510 uses the location information and the signal-to-interference information received from the terminals communicating with the base station 300 using the first frequency band, and the signal-to-interference information using the location information of the repeater. A terminal having a value lower than the threshold may be identified as an interfering terminal.

In more detail, the terminal identification unit 510 communicates with a base station using a first frequency band among a plurality of terminals, selects a terminal having a value whose signal-to-interference information is lower than a threshold, and selects location information of the selected terminal. And identifying the terminal located near the one or more repeaters among the selected terminals as the interfering terminal by using the location information of each of the one or more repeaters.

The allocator 520 allocates a frequency band that is not used for communication between the base station 300 and the terminal among the second frequency bands to the interfering terminal.

In addition, when there is no frequency band available to the interfering terminal in the second frequency band, the allocation unit 520 may be used by the interfering terminal and the frequency band used by any one of the one or more terminals using the second frequency band. Assign by swapping frequency bands.

To this end, the signal-to-interference information predicting unit 530 predicts the signal-to-interference information when the terminal using the second frequency band uses the frequency band used by the interfering terminal.

For example, if there is no band to which an interference terminal is allocated in the second frequency band, the terminal currently using the frequency of the second frequency band uses a frequency band (first frequency band) used by the interference terminal. Assuming signal-to-interference information of terminals is assumed.

According to an embodiment of the present invention, the signal-to-interference information predictor 530 selects at least one terminal from among one or more terminals by using location information of each of one or more terminals using a second frequency band, Predict signal-to-interference information

That is, since the interference is likely to occur when the terminal located near the repeater uses the first frequency band, the signal-to-interference information predicting unit 530 is a signal-to-interference information centering on the terminal that is far from the repeater. Can be predicted.

According to an embodiment of the present invention, the signal-to-interference information predicting unit 530 is a terminal that interferes with the terminal by using the location information of each of the one or more terminals using the second frequency band, the strength of the received signal and the location information of the repeater Signal-to-interference information can be predicted when the frequency used is used.

In more detail, the signal interference information predictor 530 measures a distance between the terminal using the second frequency band and the position information of the relay period, and uses the second frequency band using the measured distance. The amount of interference between the terminal and the relay period can be estimated. When the terminal using the second frequency band uses the first frequency band used by the interfering terminal, the signal interference information predicting unit 530 uses the amount of interference and the strength of the received signal of the terminal using the second frequency band. It is possible to predict the signal-to-interference information of.

In this case, in estimating the signal-to-interference information of the terminal, the signal-to-interference information may be predicted by considering other repeaters in the cell other than the repeater that causes the interference terminal. This will be described in detail later with reference to the drawings.

Subsequently, the switching terminal selector 540 selects a terminal to exchange the frequency band and the frequency band used by the interfering terminal using the predicted signal-to-interference information.

According to an embodiment of the present invention, the switching terminal selector 540 selects a terminal having the largest predicted signal-to-interference information among one or more terminals using two frequency bands, or uses two frequency bands. One or more terminals may select one terminal whose predicted signal-to-interference information has a value greater than or equal to a threshold.

The switching unit 550 exchanges a frequency band used by the terminal selected by the switching terminal selecting unit 540 and a frequency band used by the interfering terminal.

According to another embodiment of the present invention, the frequency band may be exchanged only when the predicted signal-to-interference information of the selected terminal is compared with the signal-to-interference information of the interfering terminal by comparing the predicted signal-to-interference information of the selected terminal. .

Referring to FIG. 6, the terminal A-1 621, the terminal A-2 622, and the terminal A-3 623 communicate with the base station through the second frequency band, and the terminal B-1 624. And terminal B-2 625 indicates a terminal communicating with the base station through the first frequency band. The terminal R-1 626, the terminal R-2 627, and the terminal R-3 628 each have a first repeater 631, a second repeater 633, and a third repeater 635 through the first frequency band. ) Is a terminal to communicate with.

In this case, the terminal B-1 624 and the terminal B-2 625, which communicate with the base station through the first frequency band, of the

repeaters

631 and 633 and the

terminals

626 and 627 communicating using the first frequency band. Interference may be caused by the link.

Since the terminal B-1 624 is located near the first repeater 631 and the second repeater 633, when the signal-to-interference information of the terminal B-1 624 is lower than the threshold, the first repeater 631. It may be determined by the interference of the second repeater and 633.

In this case, the signal-to-interference prediction unit 320 may use the frequency bands used by the terminal A-1 621, the terminal A-2 622, and the terminal A-3 623 by the terminal B-1 624. Predict signal-to-interference information for the case.

The signal-to-interference information predictor 530 determines that the first repeater 631 and / or the second repeater 633 is connected by the distance between the

terminals

621, 622, 623 and the first repeater 631 and / or the second repeater 633. In consideration of the amount of interference that may be applied to the

terminals

621, 622, 623 and the received signal strength of the signal that the

terminals

621, 622, 623 receives from the base station 300, the

terminals

621, 622, 623 may select the frequency band used by the terminal B-1 624. Signal-to-interference information can be predicted when used.

In this case, the signal-to-interference information predictor 530 may consider a third repeater 635 other than the first repeater 631 and the second repeater 633 that cause interference to the terminal B-1 624.

For example, when the terminal A-2 622 uses the frequency band used by the terminal B-1 624, the distance from the first repeater 631 is far, so the influence of the interference by the first repeater 631 is affected. May be less. However, when the third repeater 635 communicates with the terminal R-3 628 by using a part of the first frequency band, the terminal A-2 622 and the third repeater 635 are located in close proximity. Therefore, interference by the third repeater 635 may occur. Accordingly, in the prediction of the signal-to-interference information, all the repeaters existing in the cell may be considered together in addition to the repeater causing interference with the terminal B-1 624.

7 is a frame structure of a base station and a repeater for explaining an example in which interference occurs in a terminal by a repeater according to an embodiment of the present invention, Figure 8 is a process of exchanging a frequency band according to an embodiment of the present invention It is a frame structure of a base station and a repeater for explaining an example.

Referring to FIG. 7, terminal B-1 624 and terminal B-2 625 communicate using a first frequency band. Accordingly, the terminal B-1 624 or the terminal by communication using the first frequency band between the first repeater 631 and the terminal R-1 626, the second repeater 633, and the terminal R-2 627. Interference may occur in B-2 625.

In FIG. 7, when the terminal B-1 624 is subjected to the interference by the repeater, the signal-to-interference information predicting unit 530 is the terminal A-1 621, the terminal A-2 622, and the terminal A-. 3 623 predicts signal to interference information when the frequency band used by the terminal B-1 624 is used.

Subsequently, referring to FIG. 8, when the terminal A-1 621 is selected as the terminal having the highest signal-to-interference information by the switching terminal selecting unit 540, the switching unit 550 determines that the terminal B-1 624 is selected. The frequency band used for communication with the base station 300 and the frequency band used for communication with the base station 300 are exchanged by the terminal A-1 621.

Accordingly, the terminal B-1 624 uses the frequency band used by the terminal A-1 621, thereby solving the interference problem from the first repeater 631 and the second repeater 633.

9 is a flowchart illustrating the overall flow of a communication control method of a base station according to an embodiment of the present invention. Hereinafter, a process performed at each step will be described with reference to FIG. 9.

In operation S900, at least one of location information and wireless signal information is received from a plurality of terminals and one or more repeaters. The wireless signal information may include the interference signal information of the terminal and the strength of the received signal.

In step S905, a part of the first frequency band is used to communicate with the base station by using the location information and the radio signal information, and the terminal that generates interference by one or more repeaters is identified as an interfering terminal.

That is, the terminal communicates with the base station by using a part of the first frequency band while being located in proximity to at least one repeater of the plurality of repeaters, and identifies a terminal having a signal-to-interference information having a value lower than a threshold as an interfering terminal. .

Subsequently, in step S910, it is determined whether a frequency band that can be used by an interference terminal exists in the second frequency band.

If there is a usable frequency band in the second frequency band, the usable frequency band is allocated to the interfering terminal in step S915.

If there is no available frequency band in the second frequency band, in step S920, the terminals using the second frequency band predict signal-to-interference information when the frequency band used by the interfering terminal is used.

More specifically, the signal-to-interference information can be predicted when the terminals use the frequency used by the interfering terminal by using the location information of each terminal using the second frequency band, the strength of the received signal and the location information of the repeater. .

In step S925, the terminal is selected using the predicted signal-to-interference information.

That is, one of the terminals having a value exceeding a threshold value among the predicted signal-to-interference information of the terminals may be selected.

In step S930, the frequency band used by the selected terminal is exchanged with the frequency band used by the interfering terminal.

Although the above has been described with reference to embodiments of the present invention, those skilled in the art may variously modify the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. And can be changed.

The embodiments of the present invention described above are disclosed for the purpose of illustration, and those skilled in the art having various ordinary knowledge of the present invention may make various modifications, changes, and additions within the spirit and scope of the present invention. Should be considered to be within the scope of the following claims.

Claims

In the base station,

A receiver configured to receive at least one of respective location information and wireless signal information from a plurality of terminals and one or more repeaters located within a cell area; And

A frequency allocator configured to communicate with the base station using a portion of a first frequency band of the plurality of terminals, identify an interference terminal where interference occurs by the one or more repeaters, and assign another frequency band to the interference terminal; Including,

The first frequency band is a frequency band used for communication between the one or more repeaters and the terminal, the base station characterized in that the identification of the interference terminal using at least one of the location information and radio signal information.
The method of claim 1,

The wireless signal information base station comprises at least one of signal-to-interference information (SINR) and received signal strength of each of the plurality of terminals.
The method of claim 2,

The frequency allocation unit

A terminal for communicating with the base station using the first frequency band among the plurality of terminals, selecting a terminal having a value whose signal-to-interference information is lower than a threshold,

And a terminal identification unit for identifying a terminal located near the one or more repeaters among the selected terminals as an interfering terminal using location information of the selected terminal and location information of each of the one or more repeaters.
The method of claim 3,

A second frequency band is defined as a band excluding the first frequency band among frequency bands available to the base station and the terminal.

The frequency allocation unit,

And an allocator configured to allocate at least a portion of the usable frequency bands to the interfering terminals when the second frequency band has a usable frequency band.
The method of claim 4, wherein

The allocation unit,

If there is no frequency band available to the interfering terminal in the second frequency band, the frequency band used by any one of the one or more terminals using the second frequency band and the frequency band used by the interfering terminal are exchanged. Base station characterized in that the assignment.
The method of claim 5,

The frequency allocation unit,

The base station, characterized in that for selecting any one terminal of the one or more terminals using the second frequency band using the location information of each of the plurality of terminals and the one or more repeaters.
The method of claim 5,

The frequency allocation unit,

A signal-to-interference information predictor for predicting signal-to-interference information when each of the one or more terminals using the second frequency band uses the frequency band used by the interfering terminal;

A switching terminal selecting unit which selects any one of one or more terminals using the second frequency band by using the predicted signal-to-interference information; And

An exchange unit for exchanging a frequency band used by the selected terminal and a frequency band used by the interfering terminal

The base station further comprises.
The method of claim 7, wherein

The signal-to-interference information predictor,

A base station for predicting the signal-to-interference information by selecting at least one of the one or more terminals using the second frequency band by using location information of each of the one or more terminals using the second frequency band .
The method of claim 7, wherein

The signal-to-interference information predictor,

The signal-to-interference information of each of the one or more terminals using the second frequency band is obtained by using the location information and the received signal strength of each of the one or more terminals using the second frequency band and the location information of each of the one or more repeaters. A base station for predicting.
The method of claim 7, wherein

The switching terminal selector,

Selecting a terminal having the highest value of the predicted signal-to-interference information among the one or more terminals using the second frequency band, or the predicted signal-to-interference information among the one or more terminals using the second frequency band A base station, characterized in that for selecting any one terminal having a value above the threshold.
The method of claim 7, wherein

The exchange unit,

And performing frequency band exchange when the estimated signal to interference information of the selected terminal is greater than the signal to interference information of the interfering terminal.
The method of claim 2,

The receiving unit,

And receiving at least one of the location information and the radio signal information from at least one of the plurality of terminals and the at least one repeater by at least one of periodic, aperiodic or request of the base station.
A plurality of terminals;

One or more repeaters; And

Receive at least one of respective position information and wireless signal information from the plurality of terminals and the at least one repeater, communicate using a portion of a first frequency band of the plurality of terminals, and cause interference by the at least one repeater A base station for identifying a terminal to the interference terminal, and assigns a different frequency band to the identified interference terminal,

And the first frequency band is a frequency band used for communication between the repeater and the terminal, and the identification of the interfering terminal is identified using at least one of the location information and the radio signal information.
In the communication control method of the base station,

Receiving at least one of respective location information and wireless signal information from a plurality of terminals and one or more repeaters located within a cell area;

Identifying an interfering terminal using a portion of a first frequency band of terminals directly communicating with the base station using the location information and the radio signal information and having interference caused by the one or more repeaters; And

Allocating another frequency band to the interfering terminal;

And the first frequency band is a frequency band used for communication between the repeater and the terminal.