KR102293656B1 - Method and apparatus to transmitting and receiving signal in mobile communication system - Google Patents

Abstract

The present disclosure relates to a communication technique that converges a 5G communication system for supporting a higher data rate after a 4G system with IoT technology, and a system thereof. The present disclosure provides intelligent services (eg, smart home, smart building, smart city, smart car or connected car, healthcare, digital education, retail business, security and safety related services, etc.) based on 5G communication technology and IoT-related technology. ) can be applied to
The present disclosure relates to a signal transmission/reception method and apparatus for canceling interference in a mobile communication system. A method for transmitting and receiving a signal by a base station in a mobile communication system according to an embodiment of the present disclosure includes the steps of: sharing and setting a transmission/reception coefficient and resource usage information in an interference cancellation mode with a downlink terminal and an uplink terminal; when the interference cancellation mode is triggered, instructing the downlink terminal and/or the uplink terminal to apply the set transmission/reception coefficient and the resource usage information using scheduling information; and performing an operation of transmitting and/or receiving data with the downlink terminal and/or the uplink terminal by applying the transmission/reception coefficient through the number of resources corresponding to the resource usage information. do.

Description

Method and apparatus for transmitting and receiving signals in a mobile communication system

The present invention relates to a signal transmission/reception method and apparatus for canceling interference in a mobile communication system.

Efforts are being made to develop an improved 5G communication system or pre-5G communication system in order to meet the increasing demand for wireless data traffic after the commercialization of the 4G communication system. For this reason, the 5G communication system or the pre-5G communication system is called a system after the 4G network (Beyond 4G Network) communication system or after the LTE system (Post LTE). In order to achieve a high data rate, the 5G communication system is being considered for implementation in a very high frequency (mmWave) band (eg, such as a 60 gigabyte (60 GHz) band). In order to mitigate the path loss of radio waves and increase the propagation distance of radio waves in the ultra-high frequency band, in the 5G communication system, beamforming, massive MIMO, and Full Dimensional MIMO (FD-MIMO) are used. ), array antenna, analog beam-forming, and large scale antenna technologies are being discussed. In addition, for network improvement of the system, in the 5G communication system, an evolved small cell, an advanced small cell, a cloud radio access network (cloud RAN), and an ultra-dense network (ultra-dense network) , Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation Technology development is underway. In addition, in the 5G system, FQAM (Hybrid FSK and QAM Modulation) and SWSC (Sliding Window Superposition Coding), which are advanced coding modulation (ACM) methods, and FBMC (Filter Bank Multi Carrier), which are advanced access technologies, NOMA (non orthogonal multiple access), and sparse code multiple access (SCMA) are being developed.

On the other hand, the Internet is evolving from a human-centered connection network where humans create and consume information to an Internet of Things (IoT) network that exchanges and processes information between distributed components such as objects. Internet of Everything (IoE) technology, which combines big data processing technology through connection with cloud servers, etc. with IoT technology, is also emerging. In order to implement IoT, technology elements such as sensing technology, wired and wireless communication and network infrastructure, service interface technology, and security technology are required. , M2M), and MTC (Machine Type Communication) are being studied. In the IoT environment, an intelligent IT (Internet Technology) service that collects and analyzes data generated from connected objects and creates new values in human life can be provided. IoT is a field of smart home, smart building, smart city, smart car or connected car, smart grid, health care, smart home appliance, advanced medical service, etc. can be applied to

Accordingly, various attempts are being made to apply the 5G communication system to the IoT network. For example, in technologies such as sensor network, machine to machine (M2M), and machine type communication (MTC), 5G communication technology is implemented by techniques such as beam forming, MIMO, and array antenna. there will be The application of a cloud radio access network (cloud RAN) as the big data processing technology described above is an example of the convergence of 5G technology and IoT technology.

Meanwhile, in a mobile communication system, when several pairs of transmitters and receivers operating on the same resource exist, an inter-signal interference situation may occur. Each transmitter operating on the same resource transmits a signal to a receiver that needs to receive its own signal, and the signal may act as a desired signal or interference in any receiver. In addition, each receiver can simultaneously receive a desired signal from a transmitter paired with it and an interference signal from other transmitters.

An object of the present invention is to construct a signal transmission/reception method capable of detecting a desired signal and removing interference while maximizing resource utilization when there are multiple pairs of transmitters and receivers simultaneously operating on the same resource in a mobile communication system. have.

In order to solve the above problems, a signal transmission/reception method of a base station in a mobile communication system of the present invention includes the steps of: sharing and setting transmission/reception coefficients and resource usage information in an interference cancellation mode with a downlink terminal and an uplink terminal; when the interference cancellation mode is triggered, instructing the downlink terminal and/or the uplink terminal to apply the set transmission/reception coefficient and the resource usage information using scheduling information; and performing an operation of transmitting and/or receiving data with the downlink terminal and/or the uplink terminal by applying the transmission/reception coefficient through the number of resources corresponding to the resource usage information. do.

In addition, the method for transmitting and receiving a signal of a terminal in a mobile communication system for solving the above problems includes the steps of setting a transmission/reception coefficient and resource usage information in an interference cancellation mode by sharing with a base station and other terminals; Receiving scheduling information including information indicating to apply the set transmission/reception coefficient and the resource usage information; and performing an operation of transmitting or receiving data with the base station by applying the transmission/reception coefficient through the number of resources corresponding to the resource usage information.

In addition, the base station in the mobile communication system of the present invention for solving the above problems, a transceiver for transmitting and receiving a signal; and sharing the transmission/reception coefficient and resource usage information in the interference cancellation mode with the downlink terminal and the uplink terminal, and when the interference cancellation mode is triggered, applying the set transmission/reception coefficient and the resource usage information using scheduling information Instructs the downlink terminal and/or the uplink terminal what to do, and transmits data with the downlink terminal and/or the uplink terminal by applying the transmission/reception coefficient through the number of resources corresponding to the resource usage information. and/or a control unit that performs a receiving operation.

In addition, in the mobile communication system of the present invention for solving the above problems, the terminal includes a transceiver for transmitting and receiving a signal; and setting transmission/reception coefficient and resource usage information in the interference cancellation mode by sharing with the base station and other terminals, and receiving scheduling information including information instructing to apply the set transmission/reception coefficient and the resource usage information, the resource and a control unit configured to transmit or receive data to or from the base station by applying the transmission/reception coefficient through the number of resources corresponding to the usage information.

According to the present technology, inter-signal interference control is possible without interference channel information and interference signal information for inter-signal interference cancellation.

In addition, according to the present technology, since a diversity gain can be obtained by transmitting the same signal from a plurality of resources, it is effective in an environment having low signal quality, such as a terminal located at a cell boundary.

1 is a diagram illustrating a heterogeneous network environment having different duplication directions for explaining inter-signal interference.
2 is a diagram illustrating a mobile communication system supporting a full-duplex base station and a half-duplex terminal for explaining inter-signal interference.
3 is a diagram for explaining a signal transmission/reception method for canceling interference in a mobile communication system according to an embodiment of the present invention.
4 is a diagram illustrating an example of transmission/reception coefficient values on a complex plane according to an embodiment of the present invention.
5 is a diagram for explaining a signal transmission/reception method for canceling interference in a mobile communication system according to an embodiment of the present invention.
6 is a flowchart illustrating a signal transmission/reception method for canceling interference in a mobile communication system according to an embodiment of the present invention.
7 is a flowchart illustrating a signal transmission/reception method for canceling interference in a mobile communication system according to another embodiment of the present invention.
8 is a block diagram schematically illustrating the configuration of a mobile communication system according to an embodiment of the present invention.
9 is a block diagram schematically illustrating the configuration of a mobile communication system according to another embodiment of the present invention.
10 is a block diagram illustrating an example of a configuration of a control unit of a data transmission base station according to an embodiment of the present invention.
11 is a block diagram illustrating an example of a configuration of a control unit of an uplink terminal according to an embodiment of the present invention.
12 is a block diagram illustrating an example of a configuration of a control unit of a downlink terminal according to an embodiment of the present invention.
13 is a block diagram illustrating an example of a configuration of a control unit of a data receiving base station according to an embodiment of the present invention.
14 is a block diagram illustrating another example of the configuration of a control unit of a data transmission base station according to an embodiment of the present invention.
15 is a block diagram illustrating another example of the configuration of a control unit of an uplink terminal according to an embodiment of the present invention.
16 is a block diagram illustrating another example of the configuration of a control unit of a downlink terminal according to an embodiment of the present invention.
17 is a block diagram illustrating another example of the configuration of a control unit of a data receiving base station according to an embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention can be made various changes and can have various embodiments, specific embodiments are illustrated in the drawings and the related detailed description is described. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications and/or equivalents or substitutes included in the spirit and scope of the present invention. In connection with the description of the drawings, like reference numerals have been used for like components.

Expressions such as “comprises” or “may include” that may be used in the present invention indicate the existence of the disclosed function, operation, or component, and do not limit one or more additional functions, operations, or components. In addition, in the present invention, terms such as "comprises" or "have" are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more It should be understood that this does not preclude the possibility of addition or presence of other features or numbers, steps, operations, components, parts, or combinations thereof.

In the present invention, expressions such as “or” include any and all combinations of the words listed together. For example, "A or B" may include A, may include B, or may include both A and B.

In the present invention, expressions such as "first," "second," "first," or "second," may modify various elements of the present invention, but do not limit the elements. For example, the above expressions do not limit the order and/or importance of corresponding components. The above expressions may be used to distinguish one component from another. For example, both the first user device and the second user device are user devices, and represent different user devices. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be On the other hand, when it is mentioned that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

Terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present invention, it should not be interpreted in an ideal or excessively formal meaning. does not

In describing the embodiments of the present invention in detail, the mobile communication system will mainly target the LTE system, but the main gist of the present invention is to greatly extend the scope of the present invention to other communication systems having a similar technical background and channel type. It can be applied with some modifications within the scope not departing from, which will be possible at the discretion of a person having technical knowledge skilled in the art of the present invention.

In a mobile communication system, each transmitter operating on the same resource transmits a signal to a receiver that needs to receive its own signal, and the signal acts as a desired signal or interference in any receiver. In addition, each receiver simultaneously receives a desired signal from a transmitter paired with it and an interference signal from other transmitters.

As an example, inter-signal interference may occur in a heterogeneous network environment having different duplication directions shown in FIG. 1 . 1 illustrates a heterogeneous network environment in which a macro cell and a small cell exist by a macro cell base station 100 and a small cell base station 105 and have different duplication directions. For example, a macro cell may operate in uplink and a small cell may operate in downlink in the same resource. The uplink terminal 110 of the macro cell may transmit an uplink signal to the macro cell base station 100 , and the small cell base station 105 may transmit a downlink signal to the downlink terminal 115 of the small cell. In this case, the downlink signal of the small cell base station 105 acts as interference to the uplink signal receiver of the macro cell base station 100, so that interference between base stations may occur, and the signal of the uplink terminal 110 of the macro cell Inter-terminal interference may occur by acting as interference to the receiver of the downlink terminal 115 of the small cell.

As another example, referring to FIG. 2 , inter-signal interference may occur in a communication system in which the base station supports full-duplex communication in one cell and the terminal supports half-duplex communication. have. Since the base station 200 supports full-duplex communication, the uplink and downlink operations can be performed on the same resource, and for this purpose, the uplink terminal 205 and the downlink terminal 210 can be scheduled on the same resource. In the base station 200, self-interference may occur due to a full-duplex communication operation, and inter-terminal interference may occur so that the uplink terminal 205 and the downlink terminal 210 operate on the same resource.

In this way, in order to handle inter-cell interference occurring in an environment in which multiple pairs of transmitters and receivers operating on the same resource exist, an interference cancellation method in the receiver based on interference information, and An interference avoidance scheme that operates on other resources so as not to receive interference may be considered.

In the case of the interference cancellation method, it is necessary to share information on an interference signal and information on an interference channel through cooperation between entities. For example, in a heterogeneous network environment, in a situation where a base station transmits a downlink signal and the downlink terminals of each cell receive a desired signal and interference, all base stations perfectly transmit the received signal of each cell and each channel information through the backhaul. If they can be shared, multiple base stations can be regarded as one combined base station, and inter-cell interference can be removed by using a zero forcing precoder in the base station. However, for this, information sharing through the backhaul must be perfect, which can cause a very large time delay in a limited backhaul environment in an actual communication system. Accordingly, interference on each cell can be removed while sharing limited interference signal information, interference channel information, or primary estimation signals for inter-cell interference cancellation through backhaul connection between base stations.

In a network environment that supports full-duplex communication, interference cancellation techniques may also be used. However, due to the characteristics of full-duplex communication, since transmission and reception are performed simultaneously in one base station, strong self-interference occurs. In this case, information sharing through a backhaul is not required when interference is removed, but the strength of the interference signal may be very strong compared to the size of the desired signal.

The interference avoidance method is a method of using resources by securing orthogonality between transmitters generating signals that interfere with each other. For example, in 3GPP LTE, an enhanced Inter Cell Interference Coordination (eICIC) was devised in release 10, and according to this, ABSF (Almost Blank Subframe) that transmits only reference signals excluding information signals to reduce inter-cell interference. can be used to avoid interference between base stations. Meanwhile, in the wireless sensor network, the CSMA-CA method for avoiding interference between transmitted signals through carrier detection and random backoff at the receiver may be used.

However, in an environment having a limited backhaul capacity, the interference cancellation technique may cause a problem of error propagation because incomplete interference channel information and interference signal information are shared due to a limited amount of feedback information, and performance thereof is deteriorated. As the amount of feedback is increased to improve performance, the burden of backhaul and time delay increase at the same time. In addition, since the strength of the self-interference signal is very strong in the self-interference cancellation, even a small estimation error for the self-interference channel may have a large effect on the self-interference cancellation performance.

The interference avoidance method has the advantage of reducing the amount of interference by securing orthogonality between signals that interfere with each other.

Accordingly, various embodiments of the present invention provide a transmission/reception method capable of detecting a desired signal and removing interference while increasing resource utilization when there are a plurality of pairs of transmitters and receivers simultaneously operating on the same resource in a mobile communication system. suggest

3 is a diagram for explaining a signal transmission/reception method for canceling interference in a mobile communication system according to an embodiment of the present invention.

는 각각 하향링크 송신 및 수신계수, 상향링크 송신 및 수신 계수를 의미하고, 크기가 1인 복소수일 수 있다. 각 계수의 첫 번째 아래첨자 d와 u는 각각 하향 및 상향링크를 의미하고, 두 번째 아래첨자 t는 자원 인덱스를 의미한다.

는 각각 하향링크 채널, 상향링크 채널, 기지국 간 간섭 채널, 단말 간 간섭 채널을 의미하고, 두 번째 아래첨자 t는 자원 인덱스를 의미한다. 3 shows a heterogeneous network environment having different redundancy directions. The resource described herein means time or frequency.

denotes a downlink transmission and reception coefficient and an uplink transmission and reception coefficient, respectively, and may be a complex number having a magnitude of 1. The first subscript d and u of each coefficient mean downlink and uplink, respectively, and the second subscript t means a resource index.

denotes a downlink channel, an uplink channel, an inter-BS interference channel, and an inter-terminal interference channel, respectively, and the second subscript t denotes a resource index.

를 송신하는데, 신호를 보낼 때 각 자원에서의 송신 계수

를 곱하여 전송할 수 있다. The transmitting base station 300 and the uplink terminal 315 each receive a signal from each resource (eg, resource 1 340 and resource 2 350).

When sending a signal, the transmission coefficient at each resource

It can be transmitted by multiplying by

를 곱하여 전송할 수 있다. 송신 기지국(300)은 자원 2(350)에서 송신 계수 처리부(320)에 의하여 신호에 자원 2의 하향링크 송신 계수

를 곱하여 전송할 수 있다.For example, the transmission base station 300 transmits a downlink transmission coefficient of resource 1 to a signal by the transmission coefficient processing unit 320 in resource 1 340 .

It can be transmitted by multiplying by The transmitting base station 300 transmits a downlink transmission coefficient of resource 2 to a signal by the transmission coefficient processing unit 320 in resource 2 350 .

It can be transmitted by multiplying by

를 곱하여 전송할 수 있다. 상향링크 단말(315)은 자원 2(350)에서 송신 계수 처리부(330)에 의하여 신호에 자원 2의 상향링크 송신 계수

를 곱하여 전송할 수 있다.For example, the uplink terminal 315 transmits the uplink transmission coefficient of the resource 1 to the signal by the transmission coefficient processing unit 330 in the resource 1 340 .

It can be transmitted by multiplying by The uplink terminal 315 transmits the uplink transmission coefficient of the resource 2 to the signal by the transmission coefficient processing unit 330 in the resource 2 350 .

It can be transmitted by multiplying by

를 곱하고, 모든 자원에서의 신호를 더하여 최종 수신 신호를 생성할 수 있다.The receiving base station 305 and the downlink terminal 310 give a reception coefficient in each resource to a signal received from each resource (eg, resource 1 340 and resource 2 350).

It is possible to generate a final received signal by multiplying by and adding signals from all resources.

를 곱할 수 있다. 수신 기지국(305)은 자원 2(350)에서 수신한 신호에 수신 계수 처리부(335)에 의하여 신호에 자원 2의 상향링크 수신 계수

를 곱할 수 있다. 그리고, 수신 기지국(305)은 자원 1 및 자원 2에서의 신호를 더하여 최종 수신 신호

를 생성할 수 있다For example, the receiving base station 305 receives the uplink reception coefficient of the resource 1 in the signal received by the reception coefficient processing unit 335 in the resource 1 340 .

can be multiplied by The receiving base station 305 adds the uplink reception coefficient of the resource 2 to the signal by the reception coefficient processing unit 335 on the signal received from the resource 2 350 .

can be multiplied by Then, the receiving base station 305 adds the signals from resource 1 and resource 2 to the final received signal.

can create

를 곱할 수 있다. 하향링크 단말(310)은 자원 2(350)에서 수신한 신호에 수신 계수 처리부(335)에 의하여 수신한 신호에 자원 2의 하향링크 수신 계수

를 곱할 수 있다. 그리고, 하향링크 단말(310)은 자원 1 및 자원 2에서의 신호를 더하여 최종 수신 신호

를 생성할 수 있다.For example, the downlink terminal 310 transmits the downlink reception coefficient of resource 1 to the signal received by the reception coefficient processing unit 325 in the resource 1 340 .

can be multiplied by The downlink terminal 310 receives the downlink reception coefficient of the resource 2 in the signal received by the reception coefficient processing unit 335 on the signal received from the resource 2 350 .

can be multiplied by Then, the downlink terminal 310 adds the signals from resource 1 and resource 2 to the final received signal.

can create

와 최종 수신 신호

는 수학식 1과 2로 각각 표현될 수 있다.First, according to an embodiment of the present invention, a signal received and processed by the downlink terminal 310 in each resource

and final received signal

can be expressed by Equations 1 and 2, respectively.

는 백색 잡음에 해당한다. 각 수신 신호는 원하는 하향링크 신호와 간섭을 포함하고 있다. 최종 수신 신호에서, 각 자원에서의 채널 계수가 일정하다고 가정

한다면, 수학식 2의 마지막 식이 도출될 수 있다. In Equation 1,

corresponds to white noise. Each received signal includes a desired downlink signal and interference. In the final received signal, it is assumed that the channel coefficients in each resource are constant.

If so, the last expression of Equation 2 can be derived.

In Equation 2, a condition for detecting a desired signal and removing interference is the same as Equation 3 below.

와 최종 수신 신호

는 수학식 4와 5로 각각 표현될 수 있다.Similarly, the signal received and processed by the receiving base station 305 in each resource

and final received signal

can be expressed by Equations 4 and 5, respectively.

는 백색 잡음 벡터에 해당한다. 각 수신 신호는 원하는 하향링크 신호와 간섭을 포함하고 있다. 하향링크 단말(310)에서의 최종 수신 신호와 마찬가지로, 각 자원에서의 채널 계수가 일정하다고 가정

한다면, 수학식 5의 마지막 식이 도출될 수 있다.In Equation 4,

is the white noise vector. Each received signal includes a desired downlink signal and interference. It is assumed that the channel coefficient in each resource is constant, similar to the last received signal in the downlink terminal 310 .

If so, the last expression of Equation 5 can be derived.

In Equation 5, a condition for detecting a desired signal and removing interference is the same as Equation 6.

의 조건을 정리하면 아래 표 1과 같다.Based on the above-described content, in the system model as shown in FIG. 3 , the receiving base station 305 and the downlink terminal 310 respectively cancel interference and transmit/receive coefficients capable of detecting a downlink signal and an uplink signal.

Table 1 below summarizes the conditions.

uplink signal downlink signal signal detection

interference cancellation

According to an embodiment of the present invention, since the same signal is sent from each resource and the signal is transmitted and received by multiplying the transmission and reception coefficients, if the conditions in Table 1 are satisfied, a diversity gain equal to the resource usage is obtained while detecting the signal and removing the interference. can be obtained Looking at the last equations of Equations 2 and 5, it can be seen that the signal part to be detected is multiplied by 2, which is the resource usage.

, 두 하향링크 수신 계수가 같은 값을 가지며

하향링크 송신 계수들과 첫 번째 자원에서의 상향링크 수신 계수가 같다면

, 표 1의 조건을 만족하기 위한 송수신 계수 값은 도 4에 도시된 바와 같이 복소 평면에 표현될 수 있다. 도 4의 복소 평면에 도시된 송수신 계수를 복소 지수 함수로 나타내면 아래 표 2와 같다Transceiver coefficients satisfying the conditions of Table 1 according to an embodiment of the present invention may exist infinitely. As one solution, two downlink transmission coefficients have the same value for two resources.

, the two downlink reception coefficients have the same value

If the downlink transmission coefficients and the uplink reception coefficient in the first resource are the same

, The transmission/reception coefficient values for satisfying the conditions of Table 1 may be expressed in a complex plane as shown in FIG. 4 . Table 2 below shows the transmission/reception coefficients shown in the complex plane of FIG. 4 as a complex exponential function.

transmission coefficient reception coefficient

resource 1 (t=1)

resource 2 (t=2)

Meanwhile, according to various embodiments of the present disclosure, the transmitting base station 300 and the receiving base station 305 shown in FIG. 3 may be implemented as one full-duplex base station supporting full-duplex communication.

The description of deriving the value of the transmission/reception coefficient for interference cancellation based on FIG. 3 can be applied to the simplest system model. Conditions for applying the embodiment of the present invention to a more generalized system model will be described below with reference to FIG. 5 .

The generalization of the network system shown in FIG. 3 can be extended to an environment in which each Ku, Kd uplink and downlink terminals having single or multiple antennas exist using resource usage from 2 to n. A network system model in the case of resource t in a generalized system environment according to an embodiment of the present invention may be illustrated as shown in FIG. 5 .

는 각각 하향링크 송신 및 수신 계수, 상향링크 송신 및 수신 계수를 의미하고, 크기가 1인 복소수일 수 있다. 아래 첨자들 중 첫 번째와 세 번째 아래 첨자는 상기 설명된 상하향링크와 자원 인덱스를 의미하고, 두 번째 아래 첨자 Kd 과 Ku는 각각 하향링크, 상향링크 단말 인덱스를 의미한다.

denotes a downlink transmission and reception coefficient and an uplink transmission and reception coefficient, respectively, and may be a complex number having a magnitude of 1. Among the subscripts, the first and third subscripts mean the uplink and resource indexes described above, and the second subscripts Kd and Ku mean downlink and uplink terminal indexes, respectively.

를 송신하되, 송신 계수 처리부(520)에 의해 각 신호에 각 자원의 송신 계수

를 곱해서 송신할 수 있다. Ku 개의 상향링크 단말(515) 역시 자원 n개동안 각 단말 별로 같은 신호

를 송신하되, 송신 계수 처리부(530)에 의해 각 신호에 각 자원의 송신 계수

를 곱해서 송신할 수 있다. 다중 안테나 기지국이나 단말에서 송신 계수 적용 시 각 스트림 별로 같은 송신 계수를 곱하도록 설정할 수 있다. The downlink transmitting base station 500 according to an embodiment of the present invention sends the same signal to each Kd downlink terminals for n resources for each terminal.

However, the transmission coefficient of each resource in each signal by the transmission coefficient processing unit 520

It can be transmitted by multiplying by Ku uplink terminals 515 also have the same signal for each terminal for n resources.

However, the transmission coefficient processing unit 530 transmits the transmission coefficient of each resource to each signal.

It can be transmitted by multiplying by When the multi-antenna base station or the terminal applies the transmission coefficient, it can be set to multiply the same transmission coefficient for each stream.

를 수신하되, 수신 계수 처리부(535)에 의해 각 신호에 각 자원의 수신 계수

를 곱해서 처리할 수 있다. Kd 개의 하향링크 단말(510) 역시 자원 n개동안 각 단말 별로 같은 신호

를 수신하되, 수신 계수 처리부(525)에 의해 각 신호에 각 자원의 수신 계수

를 곱해서 처리할 수 있다. 다중 안테나 기지국이나 단말에서 송신 계수 적용 시 각 스트림 별로 같은 송신 계수를 곱하도록 설정할 수 있다. 각 기기의 최종 수신 신호는 각 자원에서의 수신 계수를 곱한 후 모든 자원에서의 신호를 더하여 생성될 수 있다. 이러한 일반적인 시스템 환경에서 각 수신기에서의 신호 검출과 간섭 제거 조건은 상기 수학식 1 내지 6의 전개 과정과 마찬가지로 정리하면 아래 표 3과 같다.The uplink reception base station 505 according to an embodiment of the present invention receives the same signal for n resources from each Ku uplink terminal.

, but, the reception coefficient of each resource in each signal by the reception coefficient processing unit 535

can be multiplied by The Kd downlink terminals 510 also have the same signal for each terminal for n resources.

, but the reception coefficient of each resource in each signal by the reception coefficient processing unit 525

can be multiplied by When the multi-antenna base station or the terminal applies the transmission coefficient, it can be set to multiply the same transmission coefficient for each stream. The final reception signal of each device may be generated by multiplying reception coefficients in each resource and then adding signals from all resources. In such a general system environment, the conditions for signal detection and interference cancellation in each receiver are summarized in Table 3 below in the same manner as the development process of Equations 1 to 6 above.

uplink signal downlink signal signal detection

interference cancellation

The second subscripts l and k of the transmission/reception coefficients described in Table 3 may mean downlink and uplink terminal indices, respectively. As described in Table 3, since the resource usage in the generalized system environment according to the embodiment of the present invention is an arbitrary number of resources n, the same signal is transmitted and received n times from n resources when the signal detection condition is satisfied. Therefore, it can be seen that the diversity gain can be obtained as much as n.

Solutions for the transmission/reception coefficients satisfying the conditions of Table 3 may exist innumerably like the solutions for the conditions of Table 1. By applying the same method applied to Table 1, the generalized expression of the transmission/reception coefficient in the generalized system environment according to an embodiment of the present invention can be expressed as a complex exponential function as shown in Table 4 below.

transmission coefficient reception coefficient

resource 1 (t=1)

resource 2 (t=2)

resource 3 (t=3)

... ... ... ... ... resource n(t=n)

Through Table 4, a generalized expression of transmission and reception coefficients applicable in an environment in which l, k downlink and uplink terminals exist with n resource usage according to an embodiment of the present invention is possible and applied. Therefore, it is possible to use transmission and reception techniques that detect signals and remove interference in a generalized system environment.

In order to perform communication by applying the transmission/reception method using transmission/reception coefficients according to an embodiment of the present invention (eg, this may be defined as performing communication in an interference cancellation mode), signaling between the base station and the terminal is required. 6 illustrates signaling for signal transmission/reception in a mobile communication system according to an embodiment of the present invention. Information determined by signaling according to an embodiment of the present invention may include, for example, transmission/reception coefficient information, resource usage information, and transmission/reception coefficient application resource information.

The transmission/reception coefficient information is information on which transmission and reception coefficients are to be used by the uplink reception base station 600, the downlink transmission base station 605, the uplink terminal 610, and the downlink terminal 615. The transmission/reception coefficient information may include a downlink transmission coefficient, a downlink reception coefficient, an uplink transmission coefficient, and an uplink reception coefficient in each resource. The resource usage information means information on the number of resources that transmit the same signal.

In step 620, the uplink receiving base station 600, the downlink transmitting base station 605, the uplink terminal 610, and the downlink terminal 615 transmit/receive coefficient and resource usage information in the interference cancellation mode when the system is initially started. can share

The transmission/reception coefficient and resource usage information may be shared, for example, using a 1-bit signaling bit to share the transmission/reception coefficient and resource usage information. To this end, the base stations 600 and 605 and the terminals 610 and 615 must define and store resource usage information and transmission/reception coefficients in advance. For example, if the signaling bit value determined by one of the base stations is 1, the transmission/reception operation may be performed using the transmission/reception coefficient of each resource in the allocated resource. If the signaling bit value is 0, the transmission/reception operation using the transmission/reception coefficient according to the embodiment of the present invention is not performed.

For example, the base stations 600 and 605 and the terminals 610 and 615 store only complex θ values (transmission/reception coefficient angle values, for example, π/4) in advance for transmission/reception coefficient information, and each transmission/reception coefficient is a stored resource. Based on the usage information, it may be determined, for example, according to the rules of Table 4.

As another example, transmission/reception coefficient and resource usage information may be shared through a codebook index. According to this embodiment, each of the base stations and the terminals 600 to 615 may define a set of transmission/reception coefficients and resource usage as a codebook and store the transmission/reception coefficients and resource usage for each codebook index in advance. An example of the codebook may be shown in Table 5 below. When any one base station determines the codebook index and the codebook index is shared with each base station and the terminals 600 to 615 through signaling, the transmission/reception operation may be performed by applying the transmission/reception coefficient and resource usage of the corresponding index. Similarly, only a complex number θ value (eg, π/4) is pre-stored for the transmission/reception coefficient information, and each transmission/reception coefficient may be determined based on the stored resource usage information, for example, according to the rule of Table 4.

codebook index resource usage Transmitting/receiving coefficient angle value 0(00) 2 θ = π/4 1 (01) 2 θ = π/6 2(10) 3 θ = π/2 3(11) 3 θ = π/5

In step 625 , an interference cancellation mode trigger may be generated in any one base station, and the trigger generation may be shared by the uplink receiving base station 600 and the downlink transmitting base station 605 .

When the interference cancellation mode is triggered, the uplink reception base station 600 transmits, for example, information indicating to apply the set transmission/reception coefficient and resource usage information to the uplink scheduling information to the uplink terminal 610 in step 630 . can In step 635 , the downlink transmitting base station 615 may include information indicating to apply the set transmission/reception coefficient and resource usage information to the downlink scheduling information, for example, and transmit it to the downlink terminal 615 . In this case, the uplink scheduling and the downlink scheduling may include the existing scheduling information and additionally transmit/receive coefficients and resource usage information and may be transmitted.

In step 640 , the base stations 600 and 605 and the terminals 610 and 615 transmit the number of resource blocks allocated to data transmission or reception in uplink scheduling information or downlink scheduling information and resources corresponding to the resource usage information. Based on the number, it is possible to determine transmission/reception coefficient application resource information, that is, whether a resource to which the interference cancellation mode is applied is a frequency resource or a time resource.

The transmission/reception coefficient application resource information according to an embodiment of the present invention means information on which resource among time or frequency to which transmission and reception coefficients are used. The transmission/reception coefficient applied resource information may be implicitly transmitted, for example, through a multiple relationship between resource usage information and the number of allocated resource blocks included in the scheduling information. If the number of allocated resource blocks is a multiple of resource usage, transmission and reception coefficients may be applied to frequency resources. In this case, the same signal is transmitted to the frequency resources corresponding to the number of resource usage. Alternatively, if the number of allocated resource blocks is not a multiple of resource usage, transmission and reception coefficients may be applied to time resources. Similarly, the same signal is transmitted to the time resource as much as the number of resource usage. Specific details related to the transmission/reception method according to the transmission/reception coefficient applied resource will be described later with reference to FIGS. 10 to 17 .

In step 645, the base stations 600, 605 and the terminals 610, 615 apply the transmission/reception coefficient through the number of resources corresponding to the resource usage information to the determined transmission/reception coefficient applied resource to perform data transmission/reception. can

Meanwhile, according to various embodiments of the present disclosure, the uplink receiving base station 600 and the downlink transmitting base station 605 shown in FIG. 6 may be implemented as one full-duplex base station supporting full-duplex communication. 7 illustrates signaling for signal transmission and reception in a mobile communication system according to an embodiment of the present invention in relation to a full-duplex base station. Signaling is similar to that of FIG. 6 described above, except that the base station supports full-duplex communication.

As shown in FIG. 6 , in the case of a heterogeneous network with different duplication directions, a sharing operation of scheduling information between base stations of two cells along with transmission/reception coefficients and resource usage information is required. However, as shown in FIG. 7 , in a communication system supporting a full-duplex base station and a half-duplex terminal, since one base station simultaneously supports uplink and downlink terminals in the same resource, operation is possible without information sharing between base stations.

In step 715 , the full-duplex communication base station 700 may determine the transmission/reception coefficient and resource usage information in the interference cancellation mode when the system is initially started, and share it with the uplink terminal 610 and the downlink terminal 615 . The sharing method is the same as described above with reference to FIG. 6 .

In operation 720 , the interference cancellation mode may be triggered by the full-duplex communication base station 700 .

When the interference cancellation mode is triggered, in step 725, the full-duplex communication base station 700 includes information indicating to apply the set transmission/reception coefficient and resource usage information, for example, in the uplink scheduling information, and transmits it to the uplink terminal 705. have. In step 730 , the full-duplex communication base station 615 may include, for example, information indicating to apply the set transmission/reception coefficient and resource usage information to the downlink scheduling information and transmit it to the downlink terminal 710 .

For example, uplink scheduling information for the uplink terminal 705 may be transmitted through the PDCCH. After 4 subframes, downlink scheduling information for a downlink terminal may be transmitted through the PDCCH. In this case, the uplink scheduling and the downlink scheduling may include the existing scheduling information and additionally transmit/receive coefficients and resource usage information and may be transmitted.

In step 735, the full-duplex communication base station 700 and the terminals 705 and 710 include the number of resource blocks allocated to data transmission or reception in uplink scheduling information or downlink scheduling information and the number of resources corresponding to the resource usage information. Based on , it is possible to determine transmission/reception coefficient application resource information, that is, whether the resource to which the interference cancellation mode is applied is a frequency resource or a time resource. A method of determining transmission/reception coefficient application resource information is the same as described above with reference to FIG. 6 .

In step 740, the full-duplex communication base station 700 and the terminals 705 and 710 apply the transmission/reception coefficient through the number of resources corresponding to the resource usage information to the determined transmission/reception coefficient applied resource to perform data transmission/reception. have.

Meanwhile, the base station of FIGS. 6 and 7 according to an embodiment of the present invention must allocate resource blocks of the same location to each terminal when scheduling an uplink terminal and a downlink terminal. In addition, the base station should transmit the modulation/demodulation and coding scheme to be used by each terminal in consideration of the diversity gain generated by the resource usage when scheduling each terminal.

8 is a block diagram schematically illustrating the configuration of a mobile communication system according to an embodiment of the present invention.

The mobile communication system according to this embodiment may include a first base station 800 , a second base station 820 , a first terminal 840 , and a second terminal 860 .

The first base station 800 may transmit or receive data according to an embodiment of the present invention, and the second base station 820 may perform data reception or data transmission according to an embodiment of the present invention. That is, if the first base station 800 is a data transmission base station for a corresponding resource, the second base station 820 may be a data receiving base station for the corresponding resource, and vice versa. If the first terminal 840 is a high link terminal, the second terminal 860 is an uplink terminal, and vice versa.

For example, the first base station 800 may transmit/receive data to and from the first terminal 840 .

The first base station 800 may include a controller 802 , a transmitter 806 , and a receiver 810 .

The transmitter 806 and the receiver 810 are devices for transmitting and receiving signals, respectively.

The control unit 802 determines the transmission/reception coefficient, resource usage information, and transmission/reception coefficient application resource in the interference cancellation mode (the transmission/reception coefficient application resource may be implicitly determined as discussed above), and the second base station 820, It can be set by sharing with the first terminal 840 and the second terminal 860 . A method of sharing the information is the same as described above with reference to FIG. 6 . The transmission/reception coefficient and resource usage information in the interference cancellation mode may be determined by the second base station 820 .

When the interference cancellation mode is triggered, the controller 802 may share scheduling information with the second base station 820 . In addition, by using the scheduling information, it is possible to instruct the first terminal 840 to apply the set transmission/reception coefficient and the resource usage information. The control unit 802 determines whether the resource to which the interference cancellation mode is applied is a frequency resource or a time resource, based on the number of resource blocks allocated for data transmission or reception in the scheduling information and the number of resources corresponding to the resource usage information. can A method of determining the transmission/reception coefficient application resource is the same as described above with reference to FIG. 6 .

The controller 802 may perform an operation of transmitting or receiving data with the first terminal 840 by applying the transmission/reception coefficient to the determined applied resource through the number of resources corresponding to the resource usage information.

For example, the controller 802 may multiply data transmitted through the number of resources corresponding to the resource usage information from the determined resource by the downlink transmission coefficient by the transmission coefficient processing unit 804 and transmit it through the transmission unit 806 . The control unit 802 multiplies the data received from the determined resource to the receiving unit 810 through the number of resources corresponding to the resource usage information in the reception coefficient processing unit 808 by the uplink reception coefficient, and sums the data from each resource. It is possible to obtain the final received data.

The first terminal 840 may include a controller 842 , a transmitter 846 , and a receiver 850 .

The transmitter 846 and the receiver 850 are devices for transmitting and receiving signals, respectively.

The control unit 842 shares the transmission/reception coefficient, resource usage information, and transmission/reception coefficient application resource in the interference cancellation mode with the first base station 800, the second base station 820, and the second terminal 860 (the transmission/reception coefficient application resource is can be passed implicitly as discussed earlier).

The control unit 842 may be instructed to apply the set transmission/reception coefficient and the resource usage information through the scheduling information transmitted from the first base station 800 . The control unit 842 determines whether the resource to which the interference cancellation mode is applied is a frequency resource or a time resource, based on the number of resource blocks allocated to data transmission or reception in the scheduling information and the number of resources corresponding to the resource usage information. can A method of determining the transmission/reception coefficient application resource is the same as described above with reference to FIG. 6 .

The controller 842 may transmit or receive data to or from the first base station 800 by applying the transmission/reception coefficient to the determined applied resource through the number of resources corresponding to the resource usage information.

For example, the controller 842 may multiply data transmitted through the number of resources corresponding to the resource usage information from the determined resource by the uplink transmission coefficient by the transmission coefficient processing unit 844 and transmit it through the transmission unit 846 . The control unit 842 multiplies the data received by the receiving unit 850 through the number of resources corresponding to the resource usage information from the determined resource by the downlink reception coefficient in the reception coefficient processing unit 848, and sums the data from each resource. It is possible to obtain the final received data.

For example, the second base station 820 may transmit/receive data to and from the second terminal 860 .

The second base station 820 may include a controller 822 , a transmitter 826 , and a receiver 830 .

The transmitter 826 and the receiver 830 are devices for transmitting and receiving signals, respectively.

The control unit 822 determines the transmission/reception coefficient, resource usage information, and transmission/reception coefficient application resource in the interference cancellation mode (the transmission/reception coefficient application resource may be implicitly determined as discussed above), and the first base station 800, It can be set by sharing with the first terminal 840 and the second terminal 860 . A method of sharing the information is the same as described above with reference to FIG. 6 . The transmission/reception coefficient and resource usage information in the interference cancellation mode may be determined by the first base station 800 .

When the interference cancellation mode is triggered, the controller 822 may share scheduling information with the first base station 800 . Then, by using the scheduling information, it is possible to instruct the second terminal 860 to apply the set transmission/reception coefficient and the resource usage information. The control unit 822 determines whether the resource to which the interference cancellation mode is applied is a frequency resource or a time resource, based on the number of resource blocks allocated to data transmission or reception in the scheduling information and the number of resources corresponding to the resource usage information. can A method of determining the transmission/reception coefficient application resource is the same as described above with reference to FIG. 6 .

The controller 822 may transmit or receive data with the second terminal 860 by applying the transmission/reception coefficient to the determined applied resource through the number of resources corresponding to the resource usage information.

For example, the controller 822 may multiply the data transmitted through the number of resources corresponding to the resource usage information from the determined resource by the downlink transmission coefficient by the transmission coefficient processing unit 824 and transmit it through the transmission unit 826 . The controller 822 multiplies the data received from the determined resource to the receiver 830 through the number of resources corresponding to the resource usage information in the reception coefficient processing unit 828 by the uplink reception coefficient, and sums the data from each resource. It is possible to obtain the final received data.

The second terminal 860 may include a controller 862 , a transmitter 866 , and a receiver 860 .

The transmitter 866 and the receiver 870 are devices for transmitting and receiving signals, respectively.

The control unit 862 shares the transmission/reception coefficient, resource usage information, and transmission/reception coefficient application resource in the interference cancellation mode with the first base station 800, the second base station 820, and the first terminal 840 (the transmission/reception coefficient application resource is can be passed implicitly as discussed earlier).

The control unit 862 may be instructed to apply the set transmission/reception coefficient and the resource usage information through the scheduling information transmitted from the second base station 820 . The control unit 862 determines whether the resource to which the interference cancellation mode is applied is a frequency resource or a time resource, based on the number of resource blocks allocated to data transmission or reception in the scheduling information and the number of resources corresponding to the resource usage information. can A method of determining the transmission/reception coefficient application resource is the same as described above with reference to FIG. 6 .

The controller 862 may transmit or receive data with the second base station 820 by applying the transmission/reception coefficient to the determined applied resource through the number of resources corresponding to the resource usage information.

For example, the controller 862 may multiply data transmitted through the number of resources corresponding to the resource usage information from the determined resource by the uplink transmission coefficient by the transmission coefficient processing unit 864 and transmit it through the transmission unit 866 . The control unit 862 multiplies the data received by the receiving unit 870 through the number of resources corresponding to the resource usage information from the determined resource, the reception coefficient processing unit 868 by the downlink reception coefficient, and sums the data from each resource. It is possible to obtain the final received data.

9 is a block diagram schematically illustrating the configuration of a mobile communication system including a full-duplex communication base station 900 according to another embodiment of the present invention.

In the communication system supporting the full-duplex communication base station and the half-duplex terminal according to the present embodiment, since one base station simultaneously supports the uplink and downlink terminals in the same resource, operation is possible without information sharing between the base stations. The base station 900 described in FIG. 9 refers to a full-duplex communication base station.

The mobile communication system according to the present embodiment may include a base station 900 and a terminal 920 .

When transmitting or receiving data with the terminal 920 , the base station 900 according to an embodiment of the present invention may perform data reception or transmission with another terminal (not shown) in the same resource.

The base station 900 may include a controller 902 , a transmitter 906 , and a receiver 910 .

The transmitter 906 and the receiver 910 are devices for transmitting and receiving signals, respectively.

The control unit 902 determines the transmission/reception coefficient, resource usage information, and transmission/reception coefficient application resource in the interference cancellation mode (the transmission/reception coefficient application resource may be implicitly determined as discussed above), and the terminal 920 and other terminals (not shown) can be shared and set. A method of sharing the information is the same as described above with reference to FIG. 6 .

When the interference cancellation mode is triggered, the controller 902 may instruct the terminal 920 and other terminals (not shown) to apply the set transmission/reception coefficient and the resource usage information by using the scheduling information. For example, the controller 902 may transmit uplink scheduling information to the terminal 920 and transmit downlink scheduling information to another terminal (not shown). The reverse is also possible. The control unit 902 determines whether the resource to which the interference cancellation mode is applied is a frequency resource or a time resource, based on the number of resource blocks allocated for data transmission or reception in the scheduling information and the number of resources corresponding to the resource usage information. can A method of determining the transmission/reception coefficient application resource is the same as described above with reference to FIG. 6 .

The control unit 902 may perform an operation of transmitting or receiving data with the terminal 920 by applying the transmission/reception coefficient to the determined applied resource through the number of resources corresponding to the resource usage information, An operation of receiving or transmitting data with a terminal (not shown) may be performed.

For example, the controller 902 may multiply data transmitted through the number of resources corresponding to the resource usage information from the determined resource by the downlink transmission coefficient by the transmission coefficient processing unit 904 and transmit it through the transmission unit 906 . The control unit 902 multiplies the data received from the determined resource to the receiving unit 910 through the number of resources corresponding to the resource usage information in the reception coefficient processing unit 908 by the uplink reception coefficient, and sums the data from each resource. It is possible to obtain the final received data.

The terminal 920 may include a controller 922 , a transmitter 926 , and a receiver 930 .

The transmitter 926 and the receiver 930 are devices for transmitting and receiving signals, respectively.

The control unit 922 shares the transmission/reception coefficient, resource usage information, and transmission/reception coefficient application resource in the interference cancellation mode with the base station 900 and other terminals (not shown) (the transmission/reception coefficient application resource is implicitly transmitted as discussed above). can) can do.

The control unit 922 may be instructed to apply the set transmission/reception coefficient and the resource usage information through the scheduling information transmitted from the base station 900 . The control unit 922 determines whether the resource to which the interference cancellation mode is applied is a frequency resource or a time resource, based on the number of resource blocks allocated to data transmission or reception in the scheduling information and the number of resources corresponding to the resource usage information. can A method of determining the transmission/reception coefficient application resource is the same as described above with reference to FIG. 6 .

The controller 922 may transmit or receive data with the base station 900 by applying the transmission/reception coefficient to the determined applied resource through the number of resources corresponding to the resource usage information.

For example, the controller 922 may multiply data transmitted through the number of resources corresponding to the resource usage information from the determined resource by the uplink transmission coefficient by the transmission coefficient processing unit 924 and transmit it through the transmission unit 926 . The control unit 922 multiplies the data received by the receiving unit 930 through the number of resources corresponding to the resource usage information from the determined resource, the reception coefficient processing unit 928 by the downlink reception coefficient, and sums the data from each resource. It is possible to obtain the final received data.

10 to 17 are diagrams illustrating specific methods related to a transmission/reception method of a control unit of a base station or a terminal according to a transmission/reception coefficient application resource. For example, in 3GPP LTE, the downlink transmission from the base station uses an Orthogonal Frequency Division Multiple Access (OFDMA), and the uplink transmission from the terminal uses the maximum power to average power ratio (PAPR: Peak-to). -Single Carrier Frequency Division Multiple Access (SC-FDMA), which is somewhat robust to Average Power Ratio), is used.

As an example, since the number of allocated resource blocks is a multiple of resource usage when there are two resource usage and two allocated resource blocks, the base station and the terminal may determine the transmission/reception coefficient applied resource as a frequency according to an embodiment of the present invention. One resource can be viewed as a time or frequency size occupied by one resource block.

10 is a diagram illustrating an example of an operation in which a control unit (eg, 802 or 822 of FIG. 8 , 902 of FIG. 9 ) of a base station transmits a signal when an embodiment of the present invention is applied to a frequency resource.

The control unit of the base station, for example, a serial-to-parallel converter (S/P) 1005, a subcarrier mapping module 1010, a transmission coefficient processing unit 1015, an IFFT module 1020, a CP addition module 1025 and a parallel-to-serial converter (P/S) 1030 .

A signal to be transmitted is converted into a parallel signal through the serial-to-parallel converter 1005 . The converted signal is mapped to the frequency domain by the subcarrier mapping module 1010 . In this case, for example, in order to transmit a signal from t (eg, 2) resources, the subcarrier mapping module 1010 may copy a signal and map it to a resource block. Thereafter, the transmission coefficient processing unit 1015 may multiply a corresponding transmission coefficient for each resource (eg, a resource 1 downlink transmission coefficient, a resource 2 downlink transmission coefficient). Thereafter, the signal may be converted into a time domain signal through the IFFT module 1020 . In addition, the CP is added by the CP addition module 1025 , and the time domain signal may be converted into a serial signal through the parallel-to-serial converter 1030 .

11 is a diagram illustrating an example of an operation in which a control unit (eg, 842 or 862 in FIG. 8 , 922 in FIG. 9 ) of a terminal transmits a signal when an embodiment of the present invention is applied to a frequency resource.

The control unit of the terminal, for example, a serial-to-parallel converter (S/P) 1105, a DFT module 1110, a subcarrier mapping module 1115, a transmission coefficient processing unit 1120, an IFFT module 1125, It may include a CP addition module 1130 and a parallel-to-serial converter (P/S) 1135 .

A signal to be transmitted is converted into a parallel signal through the serial-to-parallel converter 1105 . The transformed signal is spread through the DFT module 1110 , and the spread signal is mapped to the frequency domain by the subcarrier mapping module 1015 . In this case, for example, in order to transmit a signal in t (eg, 2) resources, the subcarrier mapping module 1115 may copy a signal and map it to a resource block. Thereafter, the transmission coefficient processing unit 1120 may multiply a corresponding transmission coefficient for each resource (eg, a resource 1 uplink transmission coefficient, a resource 2 uplink transmission coefficient). The signal may then be converted into a time domain signal via the IFFT module 1125 . In addition, the CP is added by the CP addition module 1130 , and the time domain signal may be converted into a serial signal through the parallel-to-serial converter 1135 .

12 is a diagram illustrating an example of an operation in which a control unit (eg, 842 or 862 of FIG. 8 , 922 of FIG. 9 ) of a terminal receives a signal when an embodiment of the present invention is applied to a frequency resource.

The control unit of the terminal, for example, a serial-to-parallel converter (S/P) 1205, a CP removal unit 1210, an FFT module 1215, a reception coefficient processing unit 1220, a subcarrier demapping module 1225 ), an equalizer (EQ) 1230 , an adder 1235 , a parallel-to-serial converter (P/S) 1240 , and a symbol determiner 1245 .

The same signal received from the two resources is converted into a parallel signal through the serial-to-parallel converter 1205 . The converted signal may be CP removed by the CP removal unit 1210 and converted into a frequency domain signal by the FFT module 1215 . The reception coefficient processing unit 1220 may multiply a reception coefficient (eg, resource 1 downlink reception coefficient, resource 2 downlink reception coefficient) for each resource on the frequency axis. Thereafter, after going through the equalizer 1230 , the summing unit 1235 may perform a summation operation for each component to detect a signal. The detected signal may be converted into a serial signal through the parallel-to-serial converter 1240 , and then an uplink output symbol may be obtained by the symbol determiner 1245 .

13 is a diagram illustrating an example of an operation in which a control unit (eg, 802 or 822 of FIG. 8 or 902 of FIG. 9 ) of a base station receives a signal when an embodiment of the present invention is applied to a frequency resource.

The control unit of the base station, for example, a serial-to-parallel converter (S/P) 1305 , a CP removal unit 1310 , an FFT module 1315 , a reception coefficient processing unit 1320 , a subcarrier demapping module 1325 . ), an equalizer (EQ) 1330 , a summation unit 1335 , an IDFT module 1340 , a parallel-to-serial converter (P/S) 1345 , and a symbol determiner 1350 .

The same signal received from the two resources is converted into a parallel signal through the serial-to-parallel converter 1305 . The converted signal may be CP removed by the CP removing unit 1310 and converted into a frequency domain signal by the FFT module 1315 . The reception coefficient processing unit 1320 may multiply a reception coefficient (eg, resource 1 uplink reception coefficient, resource 2 uplink reception coefficient) for each resource on the frequency axis. Thereafter, after going through the equalizer 1330 , the summing unit 1335 may perform a summation operation for each component to detect a signal. The detected signal may be converted into a serial signal through the IDFT module 1340 through the parallel-to-serial converter 1345 . Thereafter, an uplink output symbol may be obtained by the symbol determiner 1350 .

As another example, when there are two resource usage and 3 allocated resource blocks, the number of allocated resource blocks is not a multiple of resource usage, so the base station and the terminal may determine the transmission/reception coefficient application resource as time according to an embodiment of the present invention. . One resource can be viewed as a time or frequency size occupied by one resource block.

14 is a diagram illustrating an example of an operation in which a control unit (eg, 802 or 822 of FIG. 8 , 902 of FIG. 9 ) of a base station transmits a signal when an embodiment of the present invention is applied to a time resource. The control unit of the base station may transmit the same signal through, for example, time resource 1 ( 1400a ) and time resource 2 ( 1400b ).

The control unit of the base station, for example, a serial-to-parallel converter (S/P) 1405, a subcarrier mapping module 1410, a transmission coefficient processing unit 1415, an IFFT module 1420, a CP addition module 1425 and a parallel-to-serial converter (P/S) 1430 .

A signal to be transmitted is converted into a parallel signal through a serial-to-parallel converter 1405 in each time resource. The transformed signal of each time resource is mapped to the frequency domain by the subcarrier mapping module 1410 . Thereafter, the transmission coefficient processing unit 1415 may multiply a corresponding transmission coefficient for each resource (eg, a resource 1 downlink transmission coefficient, a resource 2 downlink transmission coefficient). Thereafter, the signal of each time resource may be converted into a time domain signal through the IFFT module 1420 . Then, the CP is added by the CP addition module 1425 , and the time domain signal may be converted into a serial signal through the parallel-to-serial converter 1430 .

15 is a diagram illustrating an example of an operation in which a control unit (eg, 842 or 862 in FIG. 8 , 922 in FIG. 9 ) of a terminal transmits a signal when an embodiment of the present invention is applied to a time resource. The control unit of the terminal may transmit the same signal through, for example, time resource 1 ( 1500a ) and time resource 2 ( 1500b ).

The control unit of the terminal, for example, a serial-to-parallel converter (S/P) 1505, a DFT module 1510, a subcarrier mapping module 1515, a transmission coefficient processing unit 1520, an IFFT module 1525, It may include a CP addition module 1530 and a parallel-to-serial converter (P/S) 1535 .

A signal to be transmitted is converted into a parallel signal through a serial-to-parallel converter 1505 in each time resource. The transformed signal of each time resource is spread through the DFT module 1510 , and the spread signal is mapped to the frequency domain by the subcarrier mapping module 1515 . Thereafter, the transmission coefficient processing unit 1520 may multiply a corresponding transmission coefficient for each resource (eg, a resource 1 uplink transmission coefficient, a resource 2 uplink transmission coefficient). Thereafter, the signal of each time resource may be converted into a time domain signal through the IFFT module 1525 . In addition, the CP is added by the CP addition module 1530 , and the time domain signal may be converted into a serial signal through the parallel-to-serial converter 1535 .

16 is a diagram illustrating an example of an operation in which a control unit (eg, 842 or 862 in FIG. 8 , 922 in FIG. 9 ) of a terminal receives a signal when an embodiment of the present invention is applied to a time resource. The control unit of the terminal may receive the same signal through, for example, time resource 1 (1600a) and time resource 2 (1600b).

The control unit of the terminal, for example, a serial-to-parallel converter (S/P) 1605 , a CP removal unit 1610 , an FFT module 1615 , a reception coefficient processing unit 1620 , a subcarrier demapping module 1625 . ), an equalizer (EQ) 1630 , an adder 1635 , a parallel-to-serial converter (P/S) 1640 , and a symbol determiner 1645 .

The same signal received by the two time resources is converted into a parallel signal through a serial-to-parallel converter 1605 , respectively. The converted signal may be CP removed by the CP removing unit 1610 and converted into a frequency domain signal by the FFT module 1615 . The reception coefficient processing unit 1620 may multiply a reception coefficient (eg, a resource 1 downlink reception coefficient and a resource 2 downlink reception coefficient) corresponding to each time resource. In this case, the reception coefficient processing unit 1620 should multiply all frequency resources of one time resource by the same coefficient. Thereafter, the signal of each time resource may be summed for each component in the summing unit 1635 after passing through the equalizer 1630 . Since the summing unit 1635 needs to sum the received signals of the two time resources, the received signal of the time resource 1 1600a may be stored until the received signal of the time resource 2 1600b arrives. The summed signal may be converted into a serial signal through the parallel-to-serial converter 1640 , and then an uplink output symbol may be obtained by the symbol determiner 1645 .

17 is a diagram illustrating an example of an operation in which a control unit (eg, 802 or 822 of FIG. 8 , 902 of FIG. 9 ) of a base station receives a signal when an embodiment of the present invention is applied to a time resource. The control unit of the base station may receive the same signal through, for example, time resource 1 ( 1700a ) and time resource 2 ( 1700b ).

The control unit of the base station, for example, a serial-to-parallel converter (S/P) 1705 , a CP removal unit 1710 , an FFT module 1715 , a reception coefficient processing unit 1720 , a subcarrier demapping module 1725 . ), an equalizer (EQ) 1730 , a summation unit 1735 , an IDFT module 1740 , a parallel-to-serial converter (P/S) 1745 , and a symbol determiner 1750 .

The same signal received by the two time resources is converted into a parallel signal through a serial-to-parallel converter 1705, respectively. The converted signal may be CP removed by the CP removing unit 1710 and converted into a frequency domain signal by the FFT module 1715 . The reception coefficient processing unit 1720 may multiply a reception coefficient (eg, a resource 1 uplink reception coefficient and a resource 2 uplink reception coefficient) corresponding to each time resource. In this case, the reception coefficient processing unit 1720 should multiply all frequency resources of one time resource by the same coefficient. Thereafter, the signal of each time resource may be summed for each component in the summing unit 1735 after passing through the equalizer 1730 . Since the summing unit 1735 needs to sum the received signals of the two time resources, the received signal of the time resource 1 ( 1700a ) may be stored until the received signal of the time resource 2 ( 1700b ) arrives. The summed signal may be converted into a serial signal through a parallel-to-serial converter 1745 via the IDFT module 1740 . Thereafter, an uplink output symbol may be obtained by the symbol determiner 1750 .

Each of the above-described components of the electronic device according to various embodiments of the present disclosure may be composed of one or more components, and the name of the corresponding component may vary depending on the type of the electronic device. An electronic device according to various embodiments of the present disclosure may be configured to include at least one of the above-described components, and some components may be omitted or may further include additional other components. In addition, since some of the components of the electronic device according to various embodiments of the present disclosure are combined to form a single entity, the functions of the components prior to being combined may be performed identically.

As used in various embodiments of the present disclosure, the terms “group”, “unit”, “device” or “module” include, for example, one or a combination of two or more of hardware, software, or firmware. It can mean a unit. "A group", "part", "device" or "module" means, for example, a unit, logic, logical block, component or circuit, etc. The term may be used interchangeably. A “group”, “part”, “device” or “module” may be a minimum unit of an integrally formed component or a part thereof. A “group”, “unit”, “device” or “module” may be a minimum unit or a part of performing one or more functions. A “group”, “part”, “device” or “module” may be implemented mechanically or electronically. For example, “a group”, “a unit”, “device” or “module” according to various embodiments of the present disclosure is an application-specific integrated circuit (ASIC) that performs certain operations, known or to be developed in the future. It may include at least one of chips, field-programmable gate arrays (FPGAs), or programmable-logic devices.

Embodiments of the present disclosure disclosed in the present specification and drawings are merely provided for specific examples to easily explain the technical content of the present disclosure and help the understanding of the present disclosure, and are not intended to limit the scope of the present disclosure. Therefore, the scope of the present disclosure should be construed as including all changes or modifications derived from the technical spirit of the present disclosure in addition to the embodiments disclosed herein as being included in the scope of the present disclosure.

Claims (22)

A method for transmitting and receiving a signal of a base station in a mobile communication system, the method comprising:
sharing and setting transmission/reception coefficients and resource usage information in an interference cancellation mode with a downlink terminal and an uplink terminal;
when the interference cancellation mode is triggered, instructing the downlink terminal and/or the uplink terminal to apply the set transmission/reception coefficient and the resource usage information using scheduling information; and
Signal transmission/reception of a base station including performing an operation of transmitting and/or receiving data with the downlink terminal and/or the uplink terminal by applying the transmission/reception coefficient through the number of resources corresponding to the resource usage information Way. The method of claim 1,
The transmission/reception coefficient includes a downlink transmission coefficient, a downlink reception coefficient, an uplink transmission coefficient, and an uplink reception coefficient in each resource,
The step of sharing and setting the transmission/reception coefficient and resource usage information includes:
determining a related bit or a related code and sharing it with the downlink terminal and the uplink terminal;
setting the resource usage information corresponding to the related bit or the related code; and
and setting the downlink transmission coefficient and/or the uplink reception coefficient in each resource by using the transmission/reception coefficient angle information corresponding to the related bit or the related code. 3. The method of claim 2,
The uplink transmission coefficient in each resource is set by the uplink terminal using the transmission/reception coefficient angle information corresponding to the related bit or the related code,
The downlink reception coefficient in each resource is set by the downlink terminal using the transmission/reception coefficient angle information corresponding to the related bit or the related code. 3. The method of claim 2,
A value obtained by adding the product of the uplink reception coefficient and the uplink transmission coefficient in each resource to all resources used corresponds to the resource usage information,
The sum of the product of the uplink reception coefficient and the downlink transmission coefficient in each resource is 0 for all resources used,
The sum of the product of the downlink reception coefficient and the downlink transmission coefficient of each resource from all resources used corresponds to the resource usage information,
A signal transmission/reception method of a base station, characterized in that the sum of the product of the downlink reception coefficient and the uplink transmission coefficient of each resource is 0 for all resources used. The method of claim 1,
Based on the number of resource blocks allocated to data transmission or reception in the scheduling information and the number of resources corresponding to the resource usage information, determining whether the resource to which the interference cancellation mode is applied is a frequency resource or a time resource A method of transmitting and receiving a signal from a base station comprising a. The method of claim 1,
The transmission/reception coefficient and the resource usage information are set to be shared with other base stations,
Data transmission to the downlink terminal is performed by the base station or the other base station, and data reception from the uplink terminal is performed by the other base station or the base station. A method for transmitting and receiving a signal of a terminal in a mobile communication system, the method comprising:
Setting the transmission/reception coefficient and resource usage information in the interference cancellation mode by sharing with the base station and other terminals;
Receiving scheduling information including information indicating to apply the set transmission/reception coefficient and the resource usage information; and
and performing an operation of transmitting or receiving data with the base station by applying the transmission/reception coefficient through the number of resources corresponding to the resource usage information. 8. The method of claim 7,
The transmission/reception coefficient includes a downlink transmission coefficient, a downlink reception coefficient, an uplink transmission coefficient, and an uplink reception coefficient in each resource,
The step of sharing and setting the transmission/reception coefficient and resource usage information includes:
sharing an associated bit or an associated code determined by the base station;
setting the resource usage information corresponding to the related bit or the related code; and
and setting the downlink reception coefficient or the uplink transmission coefficient in each resource by using the transmission/reception coefficient angle information corresponding to the related bit or the related code. 9. The method of claim 8,
The uplink reception coefficient and/or the downlink transmission coefficient in each resource is set by the base station using the transmission/reception coefficient angle information corresponding to the related bit or the related code. Way. 9. The method of claim 8,
A value obtained by adding the product of the uplink reception coefficient and the uplink transmission coefficient in each resource to all resources used corresponds to the resource usage information,
The sum of the product of the uplink reception coefficient and the downlink transmission coefficient in each resource is 0 for all resources used,
The sum of the product of the downlink reception coefficient and the downlink transmission coefficient of each resource from all resources used corresponds to the resource usage information,
A method for transmitting and receiving a signal for a terminal, characterized in that the sum of the product of the downlink reception coefficient and the uplink transmission coefficient of each resource is 0 for all resources used. 8. The method of claim 7,
Based on the number of resource blocks allocated to data transmission or reception in the scheduling information and the number of resources corresponding to the resource usage information, determining whether the resource to which the interference cancellation mode is applied is a frequency resource or a time resource A method of transmitting and receiving a signal of a terminal comprising a. In a base station in a mobile communication system,
a transceiver for transmitting and receiving a signal; and
The transmission/reception coefficient and resource usage information in the interference cancellation mode are shared and set with the downlink terminal and the uplink terminal, and when the interference cancellation mode is triggered, the set transmission/reception coefficient and the resource usage information are applied using the scheduling information. instructs the downlink terminal and/or the uplink terminal to transmit data with the downlink terminal and/or the uplink terminal by applying the transmission/reception coefficient through the number of resources corresponding to the resource usage information; / or a base station including a control unit for performing a receiving operation. 13. The method of claim 12,
The transmission/reception coefficient includes a downlink transmission coefficient, a downlink reception coefficient, an uplink transmission coefficient, and an uplink reception coefficient in each resource,
The control unit is
Determine a related bit or a related code to share it with the downlink terminal and the uplink terminal, set the resource usage information corresponding to the related bit or the related code, and transmit/receive corresponding to the related bit or the related code A base station, characterized in that for setting the downlink transmission coefficient and/or the uplink reception coefficient in each resource by using the coefficient angle information. 14. The method of claim 13,
The uplink transmission coefficient in each resource is set by the uplink terminal using the transmission/reception coefficient angle information corresponding to the related bit or the related code,
The downlink reception coefficient in each resource is set by the downlink terminal using the transmission/reception coefficient angle information corresponding to the related bit or the related code. 14. The method of claim 13,
A value obtained by adding the product of the uplink reception coefficient and the uplink transmission coefficient in each resource to all resources used corresponds to the resource usage information,
The sum of the product of the uplink reception coefficient and the downlink transmission coefficient in each resource is 0 for all resources used,
The sum of the product of the downlink reception coefficient and the downlink transmission coefficient of each resource from all resources used corresponds to the resource usage information,
A base station, characterized in that the sum of the product of the downlink reception coefficient and the uplink transmission coefficient of each resource is 0 for all resources used. 13. The method of claim 12,
The control unit is
Based on the number of resource blocks allocated to data transmission or reception in the scheduling information and the number of resources corresponding to the resource usage information, determining whether the resource to which the interference cancellation mode is applied is a frequency resource or a time resource base station including. 13. The method of claim 12,
The transmission/reception coefficient and the resource usage information are set to be shared with other base stations,
Data transmission to the downlink terminal is performed by the base station or the other base station, and data reception from the uplink terminal is performed by the other base station or the base station. In a terminal in a mobile communication system,
a transceiver for transmitting and receiving a signal; and
The transmission/reception coefficient and resource usage information in the interference cancellation mode are set by sharing with the base station and other terminals, and scheduling information including information instructing to apply the set transmission/reception coefficient and the resource usage information is received, and the resource usage A terminal comprising: a controller configured to transmit or receive data to or from the base station by applying the transmission/reception coefficient through the number of resources corresponding to the information. 19. The method of claim 18,
The transmission/reception coefficient includes a downlink transmission coefficient, a downlink reception coefficient, an uplink transmission coefficient, and an uplink reception coefficient in each resource,
The control unit is
Share the related bit or related code determined by the base station, set the resource usage information corresponding to the related bit or the related code, and each using the transmission/reception coefficient angle information corresponding to the related bit or the related code The terminal, characterized in that for setting the downlink reception coefficient or the uplink transmission coefficient in the resource. 20. The method of claim 19,
The uplink reception coefficient and/or the downlink transmission coefficient in each resource is set by the base station using the transmission/reception coefficient angle information corresponding to the related bit or the related code. 20. The method of claim 19,
A value obtained by adding the product of the uplink reception coefficient and the uplink transmission coefficient in each resource to all resources used corresponds to the resource usage information,
The sum of the product of the uplink reception coefficient and the downlink transmission coefficient in each resource is 0 for all resources used,
The sum of the product of the downlink reception coefficient and the downlink transmission coefficient of each resource from all resources used corresponds to the resource usage information,
A terminal, characterized in that the sum of the product of the downlink reception coefficient of each resource and the uplink transmission coefficient in all resources used is 0. 19. The method of claim 18,
Based on the number of resource blocks allocated to data transmission or reception in the scheduling information and the number of resources corresponding to the resource usage information, determining whether the resource to which the interference cancellation mode is applied is a frequency resource or a time resource terminal including.

Images