KR20130061326A - Node, relay node and method for controlling the relay node - Google Patents

Abstract

PURPOSE: A node, a relay node thereof, and a control method thereof are provided to improve the receiving performance of a target node even in a frequency selective padding channel environment to transmit data to the target node by cooperation with a source node including a transmission antenna. CONSTITUTION: A relay node includes a receiving antenna(421), a storage unit(423), a transmission antenna(422), and an interference removing unit(425). The data reception of the receiving antenna and the data transmission of the transmission antenna are performed at the same time. The receiving antenna receives data transmitted from the transmission antenna. The interference removing unit removes the data transmitted from the transmission antenna as interference and repeats the removal or non-removal of the interference by using k-pieces of time slots. [Reference numerals] (410) Source node; (423) Storage unit; (424) Amplification unit; (425,432) Interference removing unit; (AA) Relay node

Description

Nodes, Relay Nodes, and Control Methods {NODE, RELAY NODE AND METHOD FOR CONTROLLING THE RELAY NODE}

Embodiments of the present invention relate to a node capable of operating as a target node, a relay node, and a control method thereof, and more particularly, a relay node relaying data received from a source node to improve the performance of symbol recovery at the target node. And a control method thereof and a node operable as the target node.

The cooperative relay system refers to a system in which a source node and a relay node cooperate and deliver data to a destination node by transmitting data directly from the source node to the destination node while simultaneously transmitting data to the destination node. do.

Such a cooperative relay system is classified into a half duplex and a full duplex method according to whether a relay node can simultaneously receive data from a source node and transmit data to a destination node.

Of the two methods, the full duplex method is a communication scheme for transmitting and receiving data at the same time. Referring to FIG. 1, the relay node 120 operating in the full duplex mode receives data from the source node 110. Data may be sent to the destination node 130.

However, as shown in FIG. 1, data transmitted through the transmission antenna Tx of the relay node 120 is received by the reception antenna Rx of the destination node 130 and simultaneously transmitted to the reception antenna of the relay node 120. Also received, this is a problem that acts as interference (Self Loop Interference) on the data transmitted from the source node (110).

) 및 제2 심볼의 복소 공액(Complex Conjugate)(

)을 포함하는 데이터들(230)과 제2 심볼(

) 및 제1 심볼의 복소 공액(

)을 포함하는 데이터들(240)을 2개의 전송 안테나(Tx₁, Tx₂)를 통해 동시에 목적 노드(220)로 전송한다. 이 때, 목적 노드(220)는 시공간 블록 부호화 기법을 통해 데이터들(230)과 데이터들(240)로부터 제1 심볼(

)과 제2 심볼(

)을 복원함으로써, 심볼 복원의 성능을 향상시킨다. 그러나, 상기한 종래의 시공간 블록 부호 기법은 데이터의 전송 주체인 노드(즉, 소스 노드)가 반드시 2 이상의 전송 안테나를 구비한 경우에만 적용 가능하다는 단점이 있다. Meanwhile, the Space Time Block Code (STBC) technique is a type of spatial multiplexing technique used in a multi-antenna system, and according to an orthogonal STBC (O-STBC), which is one of the space-time block code techniques, As illustrated in FIG. 2, the source node 210 may include the first symbol (

) And the complex conjugate of the second symbol (

Data and the second symbol ()

) And the complex conjugate of the first symbol (

) Transmits data (240) to the destination node (220) through two transmit antennas (Tx ₁ , Tx ₂ ) at the same time. At this time, the destination node 220 is a first symbol (from the data 230 and the data 240 through a space-time block coding scheme).

) And the second symbol (

By restoring), the performance of symbol recovery is improved. However, the above-described conventional space-time block code scheme has a disadvantage in that it is applicable only when a node (that is, a source node) that is a data transmission subject has two or more transmission antennas.

Meanwhile, as another conventional technique using the STBC scheme, the source node sequentially transmits a plurality of pieces of data configured as shown in (a) of FIG. 3 to a target node in units of timeslots using one antenna. In addition, there is a method of restoring a symbol according to the STBC scheme after the target node processes the plurality of received data in time as shown in FIG.

However, the above-described transmission scheme has a disadvantage in that reception performance (symbol restoration performance) at the target node is not good when each channel environment has a characteristic of frequency selective fading in the relay network environment as shown in FIG. 1. .

In order to solve the problems of the prior art as described above, in the present invention, the data is transmitted to the destination node in cooperation with a source node having one transmission antenna, but in the frequency selective fading channel environment, the reception performance (symbol) A relay node, a control method thereof, and a node operating as a destination node can be proposed.

In addition, another object of the present invention is to control a relay node that can effectively remove the self-loop interference in the relay node operating in a full-duplex manner.

Other objects of the present invention may be derived by those skilled in the art through the following examples.

According to a preferred embodiment of the present invention to achieve the above object, a reception antenna for receiving a plurality of data sequentially transmitted in the time slot unit at the source node; A storage unit storing the plurality of received data; a transmission antenna configured to sequentially transmit a plurality of data stored in the storage unit to a destination node in a time slot unit according to an order received by the reception antenna from a time point corresponding to k times integers; And an interference canceling unit for removing data acting as an interference with respect to a plurality of data transmitted from the source node and received through the reception antenna, wherein data reception of the reception antenna and data transmission of the transmission antenna are simultaneously performed. The reception antenna may further receive data transmitted from the transmission antenna, and the interference canceling unit may remove data transmitted from the transmission antenna and received through the reception antenna as interference, and unit the k timeslots. As a result, there is provided a relay node, which repeatedly performs the elimination of interference and the non-interference elimination.

The plurality of data is divided into a plurality of data blocks each including 2k data, and each of the plurality of data blocks includes a first sub data block including the first k data of the 2k data and the next k data. The first sub data block and the second sub data block may be simultaneously transmitted through different transmission antennas in the multi-antenna system.

The 2k data may be data for representing k symbols.

K has a value of 2, the two data included in the first sub data block includes a complex conjugate of a first symbol and a second symbol, and the two data included in the second sub data block are first It may include a complex conjugate of two symbols and a first symbol.

The destination node receives a plurality of data transmitted from the source node and a plurality of data transmitted from the transmission antenna, and transmits a plurality of data transmitted from the source node according to a space time block code (STBC) technique. And the k symbols from the plurality of data transmitted by the transmit antenna.

Further, according to another embodiment of the present invention, a reception antenna for receiving a plurality of first data sequentially transmitted in the time slot unit at the source node and a plurality of second data sequentially transmitted in the time slot unit at the relay node; And a symbol reconstruction unit for reconstructing two or more symbols from the plurality of first data and the plurality of second data according to a space-time block code scheme, wherein the plurality of second data is the plurality of first data at the relay node. After receiving the interference to remove the interference, and delayed for a time corresponding to the time (k (an integer of 2 or more)) corresponding to the transmission, the relay node receives the plurality of first data and the transmission of the plurality of second data May be performed simultaneously, and the plurality of second data are returned to the relay node and received, and the relay node removes the plurality of second data received by the feedback as interference, and unites the k timeslots. As a result, there is provided a node which repeatedly performs the elimination of interference and the non-elimination of interference.

In addition, according to another embodiment of the present invention, in the method for controlling a relay node including a receiving antenna, a storage unit and a transmitting antenna, a plurality of data sequentially transmitted in a time slot unit from a source node through the receiving antenna Receiving; Storing the received plurality of data in the storage unit; From the time point corresponding to k timeslots through the transmitting antenna, elapsed time, a plurality of pieces of data stored in the storage unit in order of time slots are sequentially transferred to the destination node in the order received by the receiving antenna. Transmitting; And removing data acting as an interference for a plurality of data transmitted from the source node and received through the receiving antenna, wherein the receiving and the transmitting may be performed simultaneously. The antenna further receives data transmitted from the transmit antenna, and the removing may remove, as interference, data transmitted from the transmit antenna and received through the receive antenna, based on the k timeslots. Provided is a control method of a relay node, characterized by repeatedly performing cancellation and non-removal of interference.

According to the present invention, the reception performance (symbol recovery performance) at the target node can be improved even in a frequency selective fading channel environment including a relay node.

In addition, according to the present invention, feedback loop interference at a relay node operating according to the full duplex method can be effectively eliminated.

1 is a diagram illustrating an example of a conventional full-duplex cooperative relay system.
2 is a diagram illustrating an example of a multiple antenna system using a conventional space-time block code technique.
3 is a view for explaining a conventional technique for transmitting data using the STBC technique.
4 is a diagram illustrating a schematic configuration of a cooperative relay system according to an embodiment of the present invention.
5 is a diagram illustrating an example of a structure of a plurality of data transmitted from a source node according to an embodiment of the present invention.
6 illustrates an example of a data structure received through a receive antenna of a relay node according to an embodiment of the present invention.
7 is a diagram illustrating an example of a structure of data received by an object node according to an embodiment of the present invention.
8 is a flowchart illustrating an overall flow of a method for controlling a relay node according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is a diagram illustrating a schematic configuration of a cooperative relay system according to an embodiment of the present invention.

Referring to FIG. 4, the cooperative relay system 400 according to an embodiment of the present invention includes a source node 410, a relay node 420, and a destination node 430. Here, the source node 410 is provided with one transmit antenna 411, the destination node is one receive antenna 421, one transmit antenna 422, storage unit 423 amplifying unit 424 and interference The destination node 430 includes a reception antenna 431 and a symbol recovery unit 432.

Meanwhile, in the present embodiment, it is assumed that the radio channel environment in which the cooperative relay system 400 operates is a frequency-selective fading environment. However, the present invention is not limited thereto.

Hereinafter, the function of each component will be described in detail.

The source node 410 sequentially transmits a plurality of data to the outside in units of time slots through the transmission antenna 411.

According to one embodiment of the present invention, the plurality of data transmitted from the source node 410 is divided into a plurality of data blocks each containing 2k data, each of the plurality of data blocks is 2k (k is an integer of 2 or more) Data includes a first sub data block including the first k data and a second sub data block including the next k data, wherein the first sub data block and the second sub data block are different from each other in the multi-antenna system. It may be one that can be transmitted at the same time through the transmission antenna. In this case, 2k data may be data for representing k symbols.

,

)을 표현하기 위한 4개의 데이터를 전송하는데, 본 발명의 일 실시예에 따른 소스 노드(410)는 주파수 선택적 페이딩 채널 환경에서도 하나의 전송 안테나(411)를 통해 시공간 블록 부호에 따른 데이터의 전송과 유사한 효과를 얻기 위하여 앞서 설명한 바와 같이 다수의 데이터를 구성하여 타임슬롯 단위로 순차적으로 외부로 전송한다. In more detail, the conventional source node 210 operating by using the space-time block code as described above with reference to FIG. 2 uses two timeslots through two transmission antennas Tx ₁ and Tx ₂ . Two symbols (

,

In this case, the source node 410 according to an embodiment of the present invention transmits data according to a space-time block code through one transmit antenna 411 even in a frequency selective fading channel environment. In order to obtain a similar effect, as described above, a plurality of data are configured and sequentially transmitted to the outside in the time slot unit.

5 illustrates an example of a structure of a plurality of data transmitted from the source node 410 according to an embodiment of the present invention. More specifically, FIG. 5 is a diagram showing a structure of a plurality of data when k has a value of 2. FIG.

Looking at the structure of a plurality of data transmitted from the source node 410 according to an embodiment of the present invention with reference to Figure 5, the plurality of data is divided into a plurality of data blocks 510 each comprising four data Can be. The first two data of the four data included in each of the plurality of data blocks 510 constitute the first sub data block 520, and the next two data constitute the second sub data block 530. . Here, the first sub data block 520 and the second sub data block 530 may be simultaneously transmitted through different antennas in the multi-antenna system, and the data 230 and the data ( 240 respectively.

/

/

) 및 제2 심볼의 복소 공액(Complex Conjugate)(

/

/

)과 대응되는 2개의 데이터를 포함하고, 제2 서브 데이터 블록(530)은 제2 심볼(

/

/

) 및 제1 심볼의 복소 공액(

/

/

)과 대응되는 2개의 데이터를 포함한다. In addition, four data included in one data block 510 may be data for representing two symbols, and the first sub data block 520 may include a first symbol (

Of

Of

) And the complex conjugate of the second symbol (

/

/

), And the second sub data block 530 includes a second symbol (

Of

Of

) And the complex conjugate of the first symbol (

Of

Of

) And two data corresponding to

Data transmitted from the source node 410 may be received by both the relay node 420 and the destination node 430, and the relay node 420 forwards the data transmitted from the source node 410 to the destination node 430. do.

In more detail, the relay node 420 receives a plurality of data sequentially transmitted in a time slot unit from the source node 410 through the receiving antenna 421, and stores the plurality of received data in the storage unit 423 ( In one example, it is temporarily stored in a buffer).

Thereafter, the relay node 420 sequentially stores the data in a time slot unit according to the order received through the reception antenna 421 from the time when the time corresponding to the k timeslots has elapsed using the transmission antenna 422. A plurality of data stored at 423 is transmitted to the destination node 430.

In this case, the relay node 420 may amplify a plurality of data through the amplifier 424 and store the data in the storage 423, or after amplifying the data stored in the storage 423, the transmission antenna 422. It may be transmitted to the destination node 430 by using. That is, the relay node 420 according to an embodiment of the present invention may transfer the data received from the source node 410 to the destination node 430 in an amplify and forward manner.

In addition, the relay node 420 may simultaneously perform data reception through the reception antenna 421 and data transmission through the transmission antenna 422. That is, the relay node 420 according to an embodiment of the present invention may be a relay node operating in a full duplex manner. Accordingly, the relay node 420 receives data included in the i + k (i is an integer of 1 or more) timeslot through the receiving antenna 421 from the source node 410 and simultaneously receives the data through the transmitting antenna 422. Data included in the first timeslot may be transmitted to the destination node 430.

The interference controller 425 removes data acting as an interference on a plurality of data transmitted from the source node 410 and received through the reception antenna 421.

More specifically, data transmitted through the transmit antenna 422 is received by the receiving antenna 421 of the relay node 420 as well as the destination node 430, which interferes with the data transmitted from the source node 410 (Return loop interference), the interference canceller 425 of the relay node 420 removes the feedback loop interference as described above.

According to an embodiment of the present invention, the interference canceling unit 425 may repeatedly remove the interference and the non-interference removal based on k timeslots. Hereinafter, the operation of the interference canceling unit 425 will be described in more detail with reference to FIG. 6.

6 illustrates an example of a data structure received through the receiving antenna 421 of the relay node 420 according to an embodiment of the present invention.

More specifically, FIG. 6 illustrates a reception data structure at the relay node 420 when k has a value of 2. Referring to FIG. 6, the reception antenna 421 of the relay node 420 is a source node. A plurality of data 610 transmitted from 410 and a plurality of data transmitted from the transmission antenna 422 of the relay node 420 are simultaneously received.

)과 제2 심볼의 복소 공액(

)이 포함된 제1 서브 데이터 블록(릴레이 노드(420)로부터 수신함) 및 제2 심볼(

)과 제1 심볼의 복소 공액(

)이 포함된 제2 서브 데이터 블록(소스 노드(410)로부터 수신함)를 동시에 수신한다. 이 때, 과

는 동일한 제1 심볼이고,

과

는 동일한 제2 심볼이므로, 이는 앞서 도 2에서 설명한 시공간 블록 부호 기법을 이용하여 서로 다른 2개의 전송 안테나에서 전송된 신호를 수신하는 경우와 동일하다. 그리고, 이와 같은 관계는 짝수 번째 서브 시간 블록(640)에서 수신되는 제1 심볼(

/

) 및 제2 심볼(

/

)과 짝수 번째 서브 시간 블록(650)에서 수신되는 제1 심볼(

/

) 및 제2 심볼(

/

)에서도 동일하게 적용된다. 즉, 짝수 번째 서브 시간 블록(630, 640, 650)에서 수신되는 데이터들은 시공간 블록 부호 기법의 적용이 가능한 구조를 가진다. In this case, the receive antenna 421 of the relay node 420 in the even-numbered sub-time block 630 is the first symbol (

) And the complex conjugate of the second symbol (

) Includes a first sub data block (received from the relay node 420) and a second symbol (

) And the complex conjugate of the first symbol (

And simultaneously receive the second sub data block (received from the source node 410). At this time, and

Is the same first symbol,

and

Since is the same second symbol, this is the same as the case of receiving a signal transmitted from two different transmission antennas using the space-time block code scheme described in FIG. In addition, such a relationship may correspond to the first symbol received in the even-numbered sub-time block 640.

Of

) And the second symbol (

Of

) And the first symbol received in the even-th sub-time block 650 (

Of

) And the second symbol (

Of

The same applies to. That is, the data received in the even-numbered sub-time blocks 630, 640, and 650 have a structure in which a space-time block code technique can be applied.

)과 제2 심볼의 복소 공액(

)이 포함된 제1 서브 데이터 블록(소스 노드(410)로부터 수신함) 및 제2 심볼(

)과 제1 심볼의 복소 공액(

)이 포함된 제2 서브 데이터 블록(소스 노드(410)로부터 수신함)를 동시에 수신하지만,

과

는 서로 상이한 제1 심볼이고,

과

역시 서로 상이한 제2 심볼이므로, 이에 대해서는 앞서 도 2에서 설명한 시공간 블록 부호 기법이 적용될 수 없다(이는 홀수 번째 시간 블록(670)에서 수신되는 제1 심볼(

/

) 및 제2 심볼(

/

)에서도 동일하게 적용됨). 즉, 홀수 번째 서브 시간 블록(660, 670)에서 수신되는 데이터들은 시공간 블록 부호 기법이 적용될 수 없는 구조를 가진다. However, in the odd-numbered sub time block 660, the reception antenna 421 of the relay node 420 may have the first symbol (

) And the complex conjugate of the second symbol (

) Includes a first sub data block (received from source node 410) and a second symbol (

) And the complex conjugate of the first symbol (

Receive the second sub-data block (received from the source node 410) containing

and

Are first symbols different from each other,

and

Since the second symbols are also different from each other, the space-time block coding scheme described above with reference to FIG. 2 cannot be applied (this is the first symbol received in the odd-numbered time block 670).

Of

) And the second symbol (

Of

The same applies to). That is, the data received in the odd-numbered sub-time blocks 660 and 670 has a structure in which the space-time block code technique cannot be applied.

Accordingly, the interference canceller 425 does not remove the data corresponding to the feedback loop interference received in the even-numbered sub-time blocks 630, 640, and 650, to which the space-time block code technique is applicable, and the odd-numbered sub-time block ( Data corresponding to feedback loop interference received at 650 and 660 may be removed to perform partial interference cancellation. Accordingly, in the even-numbered sub-time blocks 630, 640, and 650, the relay node 420 returns the data received from the source node 410 and transmits the received data to the destination node 430 simultaneously, and the odd number is the same. In the first sub time blocks 660 and 570, only data received from the source node 410 is transmitted to the destination node 430.

In this case, since the interference control unit 425 knows in advance the data acting as interference in the reception antenna 421 (that is, the data transmitted from the transmission antenna 422), the reception antenna 421 uses the previously known data. And the channel parameter between the transmit antenna and the transmission antenna 422 may be predicted, and interference may be removed by using the predicted channel parameter and previously known interference data (ie, data stored in the storage unit 423).

Subsequently, the destination node 430 may include a plurality of data transmitted from the source node 410 (hereinafter referred to as "first data") and a plurality of data received and transmitted from the source node 410 by the relay node 420. (Hereinafter referred to as "second data") are simultaneously received via the receiving antenna 431.

In this case, the relay node 420 buffers a plurality of data received from the source node 410 for a time corresponding to k timeslots, and delivers the data to the destination node 430, and k timeslots are included in the transmitted data. Alternately, each unit contains data corresponding to feedback loop interference. In addition, the destination node 430 restores two or more symbols from the plurality of first data and the plurality of second data through the symbol recovery unit 432.

As an example, when k has a value of 2, the destination node 430 may be configured to obtain the first data 710 and the second data (from the source node 410 and the relay node 420 in a manner as shown in FIG. 7). 720 simultaneously.

/

/

), 제2 심볼의 복소 공액(

/

/

), 제2 심볼(

/

/

), 제1 심볼의 복소 공액(

/

/

)이 포함된 제1 서브 데이터 블록(릴레이 노드(420)로부터 수신함) 및 제2 심볼(

/

/

)과 제1 심볼의 복소 공액(

/

/

)이 포함된 제2 서브 데이터 블록(소스 노드(410)로부터 수신함)를 동시에 수신한다. 이는 앞서 도 2에서 설명한 시공간 블록 부호 기법을 이용하여 서로 다른 2개의 전송 안테나에서 전송된 신호를 수신하는 경우에 부가하여 제2 심볼(

/

/

)과, 제1 심볼의 복소 공액(

/

/

)이 추가적으로 더 수신되는 구조를 가진다. 따라서, 목적 노드(430)는 4개의 데이터를 이용하는 시공간 블록 부호 기법(일례로, 직교 시공간 블록 부호) 보다 더욱 높은 수신 성능(심볼 복원 성능)으로 2개의 심볼(제1 심볼(

/

/

) 및 제2 심볼(

/

/

))을 복원할 수 있게 된다.
In this case, as shown in FIG. 7, the destination node 430 may use the first symbol () in the even-numbered sub-time blocks 730, 740, and 750.

Of

Of

), The complex conjugate of the second symbol (

Of

Of

), The second symbol (

Of

Of

), The complex conjugate of the first symbol (

Of

Of

) Includes a first sub data block (received from the relay node 420) and a second symbol (

Of

Of

) And the complex conjugate of the first symbol (

Of

Of

And simultaneously receive the second sub data block (received from the source node 410). In addition to receiving a signal transmitted from two different transmission antennas using the space-time block code scheme described with reference to FIG.

Of

Of

) And the complex conjugate of the first symbol (

Of

Of

) Is additionally received. Accordingly, the destination node 430 may have two symbols (first symbol) with higher reception performance (symbol reconstruction performance) than the space-time block code scheme using four data (eg, orthogonal space-time block code).

Of

Of

) And the second symbol (

Of

Of

)) Can be restored.

8 is a flowchart illustrating an overall flow of a method for controlling a relay node according to an embodiment of the present invention. In this case, the relay node has the same configuration as the relay node 420 described above with reference to FIG. 4. Hereinafter, a process performed in each step will be described.

First, in step S810, the relay node receives a plurality of data sequentially transmitted in units of timeslots from a source node through a receiving antenna.

According to an embodiment of the present invention, the plurality of data transmitted from the source node is divided into a plurality of data blocks each containing 2k data, each of which includes the first k data of the 2k data A first sub data block and a second sub data block including the next k data, wherein the first sub data block and the second sub data block can be simultaneously transmitted through different transmit antennas in a multiple antenna system. Can be.

In addition, 2k data may be data for representing k symbols. If k has a value of 2, two data included in the first sub data block may represent a complex conjugate of the first symbol and the second symbol. And two data included in the second sub data block may include a complex conjugate of the second symbol and the first symbol.

Subsequently, in step S820, the relay node stores the received plurality of data in the storage unit.

In operation S830, the relay node uses a plurality of data stored in the storage unit sequentially in timeslots according to the order received by the receiving antenna from the time when the time corresponding to the k timeslots passes through the transmitting antenna. Send to node.

According to an embodiment of the present invention, step S810 and step S830 may be performed simultaneously, and in step S810, the receiving antenna may further receive data transmitted from the transmitting antenna. In this case, data transmitted from the transmitting antenna acts as interference to data transmitted from the source node.

Finally, in step S840, the relay node removes data received from the transmitting antenna through the interference canceling unit as interference.

As an example, in step S840, the interference canceling unit removes data transmitted from the transmission antenna of the relay node and received through the reception antenna of the relay node as interference, but removes the interference based on k timeslots as a unit. The removal can be performed repeatedly to partially remove the interference.

So far, embodiments of the method for controlling a relay node according to the present invention have been described, and the configuration of the relay node 420 described with reference to FIG. 4 may be applied thereto. Therefore, a more detailed description of the coupling noise voltage calculation method will be omitted.

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

As described above, the present invention has been described with reference to particular embodiments, such as specific elements, and limited embodiments and drawings. However, it should be understood that the present invention is not limited to the above- Various modifications and variations may be made thereto by those skilled in the art to which the present invention pertains. Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

Claims (11)

A receiving antenna for receiving a plurality of data sequentially transmitted in a time slot unit at a source node;
A storage unit storing the plurality of received data;
a transmission antenna configured to sequentially transmit a plurality of data stored in the storage unit to a destination node in a time slot unit according to an order received by the reception antenna from a time point corresponding to k times integers; And
Including an interference canceling unit for removing data acting as an interference to a plurality of data transmitted from the source node received through the receiving antenna,
Receiving data of the receiving antenna and data transmission of the transmitting antenna may be performed at the same time, the receiving antenna further receives data transmitted from the transmitting antenna,
The interference canceling unit removes data transmitted from the transmitting antenna and received through the receiving antenna as interference, and repeatedly removes interference and non-interference based on the k timeslots. Relay node. The method of claim 1,
The plurality of data is divided into a plurality of data blocks each containing 2k data,
Each of the plurality of data blocks includes a first sub data block including first k data of the 2k data and a second sub data block including next k data.
And the first sub data block and the second sub data block can be simultaneously transmitted through different transmit antennas in a multi-antenna system. The method of claim 2,
And the 2k data are data for representing k symbols. The method of claim 3,
K has a value of 2, the two data included in the first sub data block includes a conjugate of a first symbol and a second symbol, and the two data included in the second sub data block are second And a conjugate of the symbol and the first symbol. The method of claim 3,
The destination node receives a plurality of data transmitted from the source node and a plurality of data transmitted from the transmission antenna, and transmits a plurality of data transmitted from the source node according to a space time block code (STBC) technique. And recovering the k symbols from the plurality of data transmitted by the transmit antenna. A reception antenna for receiving a plurality of first data sequentially transmitted in a time slot unit at a source node and a plurality of second data sequentially transmitted in a time slot unit at a relay node; And
A symbol reconstruction unit for reconstructing two or more symbols from the plurality of first data and the plurality of second data according to a space-time block code technique,
The plurality of second data are received by the relay node to remove the interference by removing the plurality of first data, and then transmitted by delaying for a time corresponding to k times (an integer of 2 or more) times,
The relay node may simultaneously perform the reception of the plurality of first data and the transmission of the plurality of second data, wherein the plurality of second data is returned to the relay node and received, and the relay node is returned to the relay node. And removing the plurality of received second data as interference, and repeatedly eliminating interference and non-interference on the basis of the k timeslots. The method according to claim 6,
The plurality of data is divided into a plurality of data blocks each containing 2k data,
Each of the plurality of data blocks includes a first sub data block including first k data of the 2k data and a second sub data block including next k data.
And the first sub data block and the second sub data block can be simultaneously transmitted through different transmit antennas in a multi-antenna system. In the control method of a relay node comprising a receiving antenna, a storage unit and a transmitting antenna,
Receiving a plurality of data sequentially transmitted in a time slot unit from a source node through the receiving antenna;
Storing the received plurality of data in the storage unit;
From the time point corresponding to k timeslots through the transmitting antenna, elapsed time, a plurality of pieces of data stored in the storage unit in order of time slots are sequentially transferred to the destination node in the order received by the receiving antenna. Transmitting; And
Removing data acting as an interference for a plurality of data transmitted from the source node and received through the receive antenna,
The receiving step and the transmitting step may be performed simultaneously, the receiving antenna further receives data transmitted from the transmitting antenna,
The removing may be performed by removing the data transmitted from the transmitting antenna and received through the receiving antenna as interference, and repeatedly eliminating the interference and not removing the interference on the basis of the k timeslots. Control method of relay node. 9. The method of claim 8,
The plurality of data is divided into a plurality of data blocks each containing 2k data,
Each of the plurality of data blocks includes a first sub data block including first k data of the 2k data and a second sub data block including next k data.
And the first sub data block and the second sub data block can be simultaneously transmitted through different transmit antennas in a multi-antenna system. 10. The method of claim 9,
And the 2k data are data for representing k symbols. The method of claim 10,
K has a value of 2, the two data included in the first sub data block includes a conjugate of a first symbol and a second symbol, and the two data included in the second sub data block are second And a conjugate of the symbol and the first symbol.

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