KR101761058B1 - Method and Systems for Space scheduling using in-band full duplex - Google Patents

Abstract

A user location based scheduling method and system using a full duplex transmission scheme is presented. The user location based scheduling method using the full duplex transmission scheme proposed in the present invention includes a step of designating a minimum distance to be satisfied between pairs in consideration of interference between an uplink terminal and a downlink terminal in the same cell, Determining the IFD radius using the Euclidean distance of the user terminal and the corresponding full duplex base station, and simultaneously performing transmission and reception of the user terminal on the same frequency using the communication scheme according to the IFD radius.

Description

Field of the Invention [0001] The present invention relates to a method and system for scheduling a user location using a full duplex transmission scheme,

The present invention relates to a method and a system for reducing interference of a neighboring cell caused by full-duplex transmission and reducing an interference that a downlink terminal receives from an uplink terminal.

Recently, as the mobile service evolves, traffic usage is increasing. In order to satisfy such traffic demands, a technology using more spectrum, a method of installing more cells per unit subscriber, and a technique of improving spectral efficiency are considered. In-band full duplex (IFD) is one of the techniques to improve spectral efficiency.

In a conventional wireless communication system, a half-duplex transmission scheme is used in which uplink and downlink are transmitted using different carrier frequencies or transmitted at different times so that interference does not occur with each other. The full-duplex transmission scheme is a technology that can theoretically obtain efficiency twice as high as the conventional half-duplex transmission scheme by enabling one node to perform transmission and reception simultaneously on the same frequency.

According to an aspect of the present invention, there is provided a scheduling method and system according to a location of a user when a base station supporting a full duplex transmission scheme knows location information of a user. The present invention proposes a method for preventing an increase in outage due to additional interference from neighboring cells and a pairing scheme of downlink and uplink terminals in the same cell.

According to an aspect of the present invention, there is provided a method of scheduling a user location based on a full duplex transmission scheme, the method comprising: designating a minimum distance to be satisfied between pairs in consideration of interference between an uplink terminal and a downlink terminal in the same cell; Determining an IFD radius using the Euclidean distance between the user terminal and the full duplex base station arranged in accordance with the distance, performing a transmission and a reception simultaneously by the user terminal on the same frequency using the communication scheme according to the IFD radius .

Wherein the step of simultaneously performing transmission and reception by a user terminal on the same frequency using a communication scheme according to the IFD radius comprises: transmitting and receiving a 3n-IFD transmission scheme for communicating between a plurality of user terminals and one full- And a p-IFD transmission scheme for communicating between the user terminal of the base station and one full-duplex base station.

Wherein the step of simultaneously performing transmission and reception by a user terminal on the same frequency using the communication scheme according to the IFD radius comprises the steps of communicating in a full duplex manner when the user terminal is located within the IFD radius, , It communicates by the half-duplex transmission method.

According to embodiments of the present invention, it is possible to reduce interference of neighboring cells caused by full-duplex transmission and to reduce interference that a downlink terminal receives from an uplink terminal.

1 is a flowchart illustrating a user location based scheduling method using a full duplex transmission scheme according to an embodiment of the present invention.
2 is a diagram illustrating an example of an interference occurrence situation in a full-duplex transmission scheme according to an embodiment of the present invention.
3 is a diagram illustrating a configuration of a user location based scheduling system using a full duplex transmission scheme according to an embodiment of the present invention.
4 is a graph comparing transmission rates according to a minimum distance between two terminals according to an embodiment of the present invention.
FIG. 5 is a diagram illustrating an arrangement of terminals per cell according to an embodiment of the present invention.
6 is a graph illustrating a transmission rate according to an IFD radius according to an embodiment of the present invention.
7 is a graph illustrating a downlink outage probability according to an IFD range according to an embodiment of the present invention.
8 is a graph illustrating an uplink outage probability according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a flowchart illustrating a user location based scheduling method using a full duplex transmission scheme according to an embodiment of the present invention.

A user location based scheduling method using the proposed full duplex transmission scheme includes a step 110 of designating a minimum distance to be satisfied between pairs in consideration of interference between an uplink terminal and a downlink terminal in the same cell, A step 120 of determining an IFD radius using the Euclidean distance between the UE and the corresponding full duplex base station 120, and a step 130 of performing simultaneous transmission and reception of a user terminal on the same frequency using a communication scheme according to the IFD radius .

2 is a diagram illustrating an example of an interference occurrence situation in a full-duplex transmission scheme according to an embodiment of the present invention.

First, a user location based scheduling system model using the proposed full duplex transmission scheme is shown in FIG. In the present invention, frequency division multiple access (FDMA) is assumed as a multiple access scheme.

As shown in FIG. 2A, a case where two user terminals and a full-duplex base station perform 2: 1 communication is referred to as 3n-IFD (3node form IFD), and a case where a terminal and a base station transmit full- -IFD (pairwise IFD).

FDMA is allocated to different frequencies per user, and there may be 10 sub-frames in one frame. For example, downward / upward / downward / upward / ... / Downward / Upward terminal and up / down / up / down / ... / The terminal operating in the up / down direction becomes one pair.

단말의 하향링크 SINR 은 수학식(1)로 나타낼 수 있다. 이때, 반이중 전송방식에 비해 인접 셀의 상향링크 단말로부터 오는 간섭과 동일 셀의 상향링크 단말로부터 발생하는 간섭이 추가되었다.
In the case of the 3n-IFD transmission scheme, in the m < th > cell,

The downlink SINR of the UE can be expressed by Equation (1). In this case, interference from the uplink terminal of the adjacent cell and interference from the uplink terminal of the same cell are added to the half-duplex transmission scheme.

_수학식(1)

_{Equation (1)}

는 수신하고자 하는 신호로 기지국 송신전력과 기지국-단말간 채널 이득으로 구성되고,

는 수신 단말에서 발생하는 수신 잡음,

는 이웃 기지국에서 수신 단말(m번째 기지국의 수신단말)로 들어오는 간섭,

는 이웃 기지국의 상향링크 단말과 m번째 기지국의 상향링크 단말로부터 들어오는 간섭을 나타낸다. Here, G _{a, b} represents the channel gain that occurs when a signal is transmitted from a to b.

Is a signal to be received, which is composed of base station transmission power and a base station-to-terminal channel gain,

Is the reception noise generated at the receiving terminal,

The interference to the receiving terminal (the receiving terminal of the m-th base station) from the neighboring base station,

Represents the interference from the uplink terminal of the neighboring base station and the uplink terminal of the m-th base station.

단말의 하향링크 SINR는 수학식(2)로 나타낼 수 있다. 이때 반이중 전송방식에 비해 자기간섭 신호와 인접 셀의 상향링크 단말로부터 발생하는 간섭이 추가되었다.
In the case of the P-IFD transmission scheme, in the m < th >

The downlink SINR of the UE can be expressed by Equation (2). At this time, the self interference signal and the interference generated from the uplink terminal of the adjacent cell are added to the half duplex transmission scheme.

_수학식(2)

_{Equation (2)}

는 수신하고자 하는 신호,

는 수신 단말에서 발생하는 수신 잡음을 나타낸다. 그리고, p-IFD의 경우 단말이 동시에 동일 주파수를 이용하여 송수신을 하기 때문에 본인의 송신 신호로부터 자기간섭(self-interference, SI)이 발생하며,

는 SI를 제거하고 남은 자기간섭(residual SI)을 나타낸다.

는 인접 셀의 기지국과 단말로부터 수신 단말로 들어오는 간섭을 나타낸다. From here,

A signal to be received,

Represents a reception noise generated at the receiving terminal. In case of p-IFD, self-interference (SI) is generated from the transmission signal of the subscriber station because the subscriber station simultaneously transmits and receives using the same frequency,

Represents the residual magnetic interference (SI) after removing the SI.

Represents interference from the base station of the adjacent cell and the terminal to the receiving terminal.

The uplink SINR of 3n-IFD and p-IFD is expressed as Equation (3), and the self interference signal generated at the base station and the interference from the base station of the adjacent cell are added.

_수학식(3)

_{Equation (3)}

는 수신하고자 하는 상향링크 신호,

는 m번째 기지국에서 발생하는 수신 잡음,

는 인접 셀의 기지국과 상향링크 단말로부터 들어오는 간섭을 나타낸다. From here,

An uplink signal to be received,

Is the reception noise generated at the m < th > base station,

Represents the interference from the base station of the neighboring cell and the uplink terminal.

In case of full-duplex transmission, twice the adjacent cell interference occurs in the uplink and the downlink compared with the conventional half-duplex transmission, and when the 3n-IFD transmission is performed, the downlink terminal receives additional interference from the uplink terminal of the same cell. Also, the terminal supporting the full duplex transmission method and the base station are subject to self interference. Therefore, when 3n-IFD transmission is performed, performance degradation due to intra-cell interference may occur depending on a relative position between an uplink terminal and a downlink terminal. In addition, a cell edge terminal sensitive to adjacent cell interference has a higher outage probability than TDD.

In step 110, a minimum distance to be satisfied between the pair is specified in consideration of interference between the UL and the DL terminals in the same cell.

As mentioned in the system model, in the 3n-IFD transmission, the downlink terminal receives the additional interference because it uses the same frequency as the uplink terminal in the same cell. Specifies the minimum distance (d _min ) that must be satisfied between pairs to account for this same intra-cell interference. The minimum distance d _min depends on the environment in which the full duplex transmission scheme is implemented. For example, in the LTE pico-cell environment, the path-loss model is changed based on the distance between the terminals of 50 m. Therefore, considering d _min , IEEE 802.11ax outdoor large BSS In the outdoor large BSS scenario, there is no such boundary point, so the simulation can determine d _min that meets the minimum requirement.

In step 120, the IFD radius is determined using the Euclidean distance of the user terminal and the full duplex base station arranged according to the minimum distance.

As described in the system model, the full-duplex transmission scheme has a higher outage probability than the conventional half-duplex transmission scheme due to the additional interference generated from the uplink user equipment and the base station of the neighbor base station, The performance degradation rate is larger than that of the conventional half duplex transmission method due to magnetic interference. Therefore, it is advantageous to use a half-duplex transmission method over the full-duplex transmission method at the cell edge. The IFD radius is determined using the Euclidean distance between the corresponding base station and the UE as shown in Equation (4), and the half-duplex transmission scheme is used when the user terminal belongs to the IFD radius, or when the user terminal is located outside the IFD radius .

_수학식(4)

_{Equation (4)}

및

는 m번째 기지국의 n번째 단말의 위치,

및

는 m번째 기지국의 위치를 나타낸다. From here,

And

Is the location of the n-th terminal of the m-th base station,

And

Represents the location of the mth base station.

보다 작은 경우 IFD로 동작하고, 큰경우 HD모드로 동작한다. The Euclidean distance between the BS and the MS is calculated using the threshold,

IFD, and if it is large, it operates in the HD mode.

In step 130, the user terminal simultaneously performs transmission and reception on the same frequency using a communication scheme according to the IFD radius.

The user location based scheduling method using the proposed full duplex transmission scheme can theoretically achieve twice the efficiency compared to the conventional half duplex transmission scheme by performing simultaneous transmission and reception of user terminals on the same frequency using the communication scheme according to the IFD radius .

In this case, the 3n-IFD transmission scheme for performing communication between a plurality of user terminals and one full-duplex base station or the p-IFD transmission scheme for communicating between one user terminal and one full-duplex base station may be used for transmission and reception.

If the user terminal is located within the determined IFD radius, it communicates in a full duplex manner. On the other hand, if the user terminal is located outside the determined IFD radius, it communicates in half duplex transmission mode.

3 is a diagram illustrating a configuration of a user location based scheduling system using a full duplex transmission scheme according to an embodiment of the present invention.

The user location based scheduling system 300 according to the present embodiment may include a processor 310, a bus 320, a network interface 330, a memory 340, and a database 350. The memory 340 may include an operating system 341 and a user location based scheduling routine 342. The processor 310 may include a minimum distance specification unit 311, an IFD radius calculation unit 312, and a control unit 313. In other embodiments, the user location based scheduling system 300 may include more components than the components of FIG. However, there is no need to clearly illustrate most prior art components. For example, the user location based scheduling system 300 may include other components such as a display or a transceiver.

The memory 340 may be a computer-readable recording medium and may include a permanent mass storage device such as a random access memory (RAM), a read only memory (ROM), and a disk drive. In addition, the memory 340 may store program code for the operating system 341 and the user location based scheduling routine 342. These software components may be loaded from a computer readable recording medium separate from the memory 340 using a drive mechanism (not shown). Such a computer-readable recording medium may include a computer-readable recording medium (not shown) such as a floppy drive, a disk, a tape, a DVD / CD-ROM drive, or a memory card. In other embodiments, the software components may be loaded into the memory 340 via the network interface 330 rather than from a computer readable recording medium.

The bus 320 may enable communication and data transfer between the components of the user location based scheduling system 300. The bus 320 may be configured using a high-speed serial bus, a parallel bus, a Storage Area Network (SAN), and / or other suitable communication technology.

The network interface 330 may be a computer hardware component for connecting the user location based scheduling system 300 to a computer network. The network interface 330 may connect the user location based scheduling system 300 to a computer network via a wireless or wired connection.

The database 350 may store and maintain all information necessary for user location based scheduling. Although FIG. 3 shows that the database 350 is built and included in the user location based scheduling system 300, it is not limited thereto and may be omitted depending on the system implementation method or environment, Is present as an external database built on a separate, separate system.

The processor 310 may be configured to process instructions of a computer program by performing basic arithmetic, logic, and input / output operations of the user location based scheduling system 300. The instructions may be provided by the memory 340 or the network interface 330 and to the processor 310 via the bus 320. The processor 310 may be configured to execute program codes for the minimum distance specification unit 311, the IFD radius calculation unit 312, and the control unit 313. [ Such a program code may be stored in a recording device such as the memory 340. [

The minimum distance specification unit 311, the IFD radius calculation unit 312, and the control unit 313 may be configured to perform the steps 110 to 130 of FIG.

The user location based scheduling system 300 may include a minimum distance specification unit 311, an IFD radius calculation unit 312, and a control unit 313.

The minimum distance designation unit 311 designates a minimum distance to be satisfied between pairs in consideration of interference between an uplink terminal and a downlink terminal in the same cell. As mentioned in the system model, in the 3n-IFD transmission, the downlink terminal transmits additional interference due to transmission using the same frequency as the uplink terminal in the same cell. The minimum distance specification unit 311 specifies a minimum distance d _min that must be satisfied between pairs in order to consider such intra-cell interference. The minimum distance d _min depends on the environment in which the full duplex transmission scheme is implemented. For example, in the LTE pico-cell environment, the path-loss model is changed based on the distance between the terminals of 50 m. Therefore, considering d _min , IEEE 802.11ax outdoor large BSS In the outdoor large BSS scenario, there is no such boundary point, so the simulation can determine d _min that meets the minimum requirement.

The IFD radius calculation unit 312 determines the IFD radius using the Euclidean distance of the user terminal and the full duplex base station arranged according to the minimum distance.

As described in the system model, the full-duplex transmission scheme has a higher outage probability than the conventional half-duplex transmission scheme due to the additional interference generated from the uplink user equipment and the base station of the neighbor base station, The performance degradation rate is larger than that of the conventional half duplex transmission method due to magnetic interference. Therefore, it is advantageous to use a half-duplex transmission method over the full-duplex transmission method at the cell edge. The IFD radius calculator 312 determines the IFD radius using the Euclidean distance between the corresponding base station and the terminal as in Equation (4). If the user terminal is within the IFD radius, If it is outside the IFD radius, use the half-duplex transmission scheme.

The control unit 313 allows the user terminal to simultaneously perform transmission and reception on the same frequency by using the communication method according to the IFD radius.

The user location based scheduling system 300 using the proposed full duplex transmission scheme can perform transmission and reception simultaneously on the same frequency using the communication scheme according to the IFD radius, thereby theoretically achieving twice as much efficiency as the conventional half duplex transmission scheme Can be obtained.

At this time, the control unit 313 may transmit and receive data using a 3n-IFD transmission scheme for communicating between a plurality of user terminals and one full-duplex base station or a p-IFD transmission scheme for communicating between one user terminal and one full- .

When the user terminal is located within the determined IFD radius, it is allowed to communicate in a full duplex manner. On the other hand, when the user terminal is located outside the determined IFD radius, it makes the communication in the half-duplex transmission mode.

4 is a graph comparing transmission rates according to a minimum distance between two terminals according to an embodiment of the present invention.

Performance evaluation is performed by applying the above pairing technique and a technique for reducing the influence of adjacent cell interference to an IEEE 802.11ax outdoor large BSS (BSS) environment. The self-interference cancellation capability of the access point (AP) is 120 dB, and the self-interference cancellation capability of the STA is assumed to be 100 dB. First, in the case of the paring technique, the minimum distance between two terminals is adjusted within a radius of 30 m and the accumulated throughput is evaluated. The cumulative throughput according to the minimum distance between the two terminals is shown in FIG. In the case of uplink, the cumulative throughput is increased as the minimum distance between the two terminals increases in the downlink of the 3n-IFD regardless of the minimum distance between the two terminals. Therefore, when pairing using the minimum distance between the terminals, the data transmission speed can be improved.

FIG. 5 is a diagram illustrating an arrangement of terminals per cell according to an embodiment of the present invention.

For performance analysis according to the IFD radius, for example, one cell is divided into five ranges (0-20 m, 20-30 m, 30-40 m, 40-50 m, 50-60 m) Place the terminal at a random location. In other words, 10 terminals are arranged per cell. For example, if the range of the IFD radius determined using the Euclidean distance of the user terminal and the corresponding full duplex base station is 40 m, a total of 6 terminals belonging to 40 m operate in a full duplex transmission mode, Lt; / RTI >

6 is a graph illustrating a transmission rate according to an IFD radius according to an embodiment of the present invention.

The cumulative throughput according to the IFD radius is shown in Fig. The full duplex transmission scheme exhibits the highest cumulative throughput at 30 m in the uplink because the performance deteriorates as the distance between the terminal and the base station increases compared to the half duplex transmission scheme. On the other hand, in the case of downlink, it is preferable in terms of the cumulative throughput to use the full duplex transmission scheme even at the edge of the cell edge.

7 is a graph illustrating a downlink outage probability according to an IFD range according to an embodiment of the present invention.

8 is a graph illustrating an uplink outage probability according to an embodiment of the present invention.

FIGS. 7 and 8 show changes in the outage probability according to the IFD radii in the downlink and uplink, respectively. In the case of downlink, the outage probability of p-IFD is the lowest when the IFD radius is 30m and the probability of outgoing more than 10% can be reduced than that of all terminals using full-duplex transmission. In addition, there is an increase of 3% of the outage probability when the IFD radius is more than 40m in 3n-IFD. In the case of the uplink, the outage probability increases significantly with the increase of the IFD radius in both full duplex transmission schemes. If all the terminals transmit full-duplex, an outage probability of 35% or more occurs. Thus, by designating the IFD radius as in the present invention, the minimum required amount of outgoing area can be satisfied.

The apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. For example, the apparatus and components described in the embodiments may be implemented within a computer system, such as, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable array (FPA) A programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For ease of understanding, the processing apparatus may be described as being used singly, but those skilled in the art will recognize that the processing apparatus may have a plurality of processing elements and / As shown in FIG. For example, the processing unit may comprise a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as a parallel processor.

The software may include a computer program, code, instructions, or a combination of one or more of the foregoing, and may be configured to configure the processing device to operate as desired or to process it collectively or collectively Device can be commanded. The software and / or data may be in the form of any type of machine, component, physical device, virtual equipment, computer storage media, or device , Or may be permanently or temporarily embodied in a transmitted signal wave. The software may be distributed over a networked computer system and stored or executed in a distributed manner. The software and data may be stored on one or more computer readable recording media.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (12)

In a user location based scheduling method using a full duplex transmission scheme,
Designating a minimum distance to be satisfied between pairs in consideration of interference between an uplink terminal and a downlink terminal in the same cell;
Determining an IFD radius using the Euclidean distance of the user terminal and the full duplex base station arranged according to the minimum distance; And
A step in which a user terminal simultaneously performs transmission and reception on the same frequency using a communication scheme according to the IFD radius
Lt; / RTI >
Wherein the step of simultaneously performing transmission and reception by a user terminal on the same frequency using a communication scheme according to the IFD radius comprises:
A 3n-IFD transmission method for communicating between a plurality of user terminals and one full duplex base station or a p-IFD transmission method for communicating between one user terminal and one full duplex base station at the time of transmission and reception,
In the case of using the 3n-IFD transmission scheme or the p-IFD transmission scheme, the uplink SINR of the scheduled UE is represented by the following equation,

Where m is the cell,

Denotes a UE scheduled in a subframe,
The uplink SINR is calculated by including a magnetic interference signal generated by a full-duplex base station and an interference signal generated by a full-duplex base station of a neighboring cell
A user location based scheduling method using full duplex transmission. delete The method according to claim 1,
In the case of using the 3n-IFD transmission scheme, the downlink SINR of the scheduled UE is represented by the following equation,

Where m is the cell,

Indicates a terminal scheduled in a subframe
A user location based scheduling method using full duplex transmission. The method of claim 3,
The downlink SINR is calculated by including the interference signal of the uplink terminal of the neighboring cell and the interference signal of the uplink terminal of the same cell
A user location based scheduling method using full duplex transmission. The method according to claim 1,
In the case of using the p-IFD transmission scheme, the downlink SINR of the scheduled UE is represented by the following equation,

Where m is the cell,

Indicates a terminal scheduled in a subframe
A user location based scheduling method using full duplex transmission. 6. The method of claim 5,
The downlink SINR is calculated by including a magnetic interference signal and an interference signal by an uplink terminal of a neighboring cell
A user location based scheduling method using full duplex transmission. delete delete The method according to claim 1,
Wherein the step of simultaneously performing transmission and reception by a user terminal on the same frequency using a communication scheme according to the IFD radius comprises:
If the user terminal is located within the IFD radius, communicates in a full duplex manner,
When the user terminal is located outside the IFD radius,
A user location based scheduling method using full duplex transmission. In a user location based scheduling system using a full duplex transmission scheme,
A minimum distance designating unit for designating a minimum distance to be satisfied between pairs in consideration of interference between an uplink terminal and a downlink terminal in the same cell;
An IFD radius calculation unit for determining an IFD radius using the Euclidean distance of the user terminal and the full duplex base station arranged according to the minimum distance; And
A control unit for allowing a user terminal to simultaneously perform transmission and reception on the same frequency using a communication scheme according to the IFD radius;
Lt; / RTI >
Wherein,
A 3n-IFD transmission method for communicating between a plurality of user terminals and one full duplex base station or a p-IFD transmission method for communicating between one user terminal and one full duplex base station at the time of transmission and reception,
In the case of using the 3n-IFD transmission scheme or the p-IFD transmission scheme, the uplink SINR of the scheduled UE is represented by the following equation,

Where m is the cell,

Denotes a UE scheduled in a subframe,
The uplink SINR is calculated by including a magnetic interference signal generated by a full-duplex base station and an interference signal generated by a full-duplex base station of a neighboring cell
User Location Based Scheduling System Using Full - duplex Transmission. delete 11. The method of claim 10,
Wherein,
If the user terminal is located within the IFD radius, to communicate in a full duplex manner,
If the user terminal is located outside the IFD radius,
User Location Based Scheduling System Using Full - duplex Transmission.

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