KR101892704B1 - Method and apparatus for arrangement for mitigation - Google Patents

Abstract

A method for mitigating interference in a home network transmission line, the method comprising: detecting an interference signal flowing from an adjacent line to a transmission line to be synchronized; extracting a transmission signal section and a reception signal section of the interference signal; Estimating a synchronization signal of the adjacent line, and applying a synchronization signal of the adjacent line as a synchronization signal of the transmission line to be synchronized.

Description

METHOD AND APPARATUS FOR ARRANGEMENT FOR MITIGATION FIELD OF THE INVENTION [0001]

The present invention relates to an interference mitigation apparatus and an interference mitigation method using the same.

One typical way to provide 100 megabits of high-speed Internet service is x Digital Subscriber Line (xDSL) using copper and FTTx (Fiber To The x) using optical cable.

In recent years, Internet service provider (ISP) companies have been competing to provide faster speeds from high-speed Internet to high-speed Internet over speed barriers. In addition, G.hn-based GiGA Wire Or G.fast are used.

However, there has been a long-standing problem of interferences, more specifically, slowing down of crosstalk, in providing services through copper lines, and studies for reducing such interference have been and have been in progress for a long time in the world.

If the access network uses a bundle of bundled copper wires to accommodate a large number of subscribers, there will be more interference between copper wires in the bundled cable.

In particular, GiGA Wire and G.fast technologies for providing gigabit internet are technologies that can provide gigabit internet based on a telephone line, but there are different methods for mitigating interference, and each technique uses a fixed synchronous clock , When the signals of the heterogeneous transmission equipment are mixed in the bundle cable, mutual induction interference signals are generated due to inconsistency of transmission / reception synchronization.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an interference mitigation apparatus and method for minimizing interference signals introduced from adjacent lines in the same bundle cable for providing a gigabyte internet so that heterogeneous network provisioning technologies can coexist in the same bundle cable, Thereby providing a mitigation method.

A method for mitigating interference in a home network transmission line according to an embodiment of the present invention includes the steps of detecting an interference signal flowing from an adjacent line to a transmission line to be synchronized, Estimating a synchronization signal of the adjacent line by extracting a signal interval, and applying a synchronization signal of the adjacent line as a synchronization signal of the transmission line to be synchronized.

The applying of the synchronization signal may generate a synchronization signal of the transmission line for synchronization change using the period of the synchronization signal of the adjacent line and the transmission ratio of the synchronization signal of the adjacent line.

The step of estimating the synchronization signal of the adjacent line includes dividing the interference signal into an interference signal due to the transmission signal provided to the adjacent line and an interference signal due to the reception signal provided to the adjacent line, Extracting an uplink / downlink transmission ratio of the synchronization signal of the adjacent line using the ratio of the interference signal interval and the interference signal interval due to the reception signal, and extracting the period of the synchronization signal of the adjacent line.

In the step of discriminating the interference signal, a signal having the intensity of the interference signal equal to or higher than a threshold value is classified into an interference signal due to the transmission signal, and a signal having an intensity of the interference signal lower than a threshold value is classified into an interference signal due to the reception signal .

The interference mitigation device may be installed in a concentrator for providing Internet service to a terminal through a bundle cable within an access interval.

The method for mitigating interference may further include transmitting data to the terminal according to a synchronization signal of the transmission line to be synchronized.

The method for mitigating interference includes transmitting synchronizing signal information including a period of a synchronizing signal of the synchronizing change object transmission line and an uplink and downlink transmission ratio to the terminal, And receiving the transmitted data according to the received data.

The interference mitigation device may be installed in a terminal located in a customer premises where Internet service is provided.

The method for mitigating interference may further include transmitting data to the concentrator in accordance with a synchronization signal of the transmission line to be synchronized.

The method for mitigating interference includes transmitting synchronizing signal information including a period of a synchronizing signal of the synchronizing change object transmission line and an uplink and downlink transmission ratio to the concentrator, And receiving the transmitted data according to the synchronization signal.

An interference mitigation apparatus for mitigating interference in a home network transmission line according to an exemplary embodiment of the present invention includes an interference signal detector for detecting an interference signal flowing from an adjacent line to a transmission line to be synchronized, A synchronization signal extracting unit for extracting a reception signal interval and estimating a synchronization signal of the adjacent line, and a synchronization signal generating unit for applying the synchronization signal of the adjacent line as a synchronization signal of the transmission line to be synchronized.

Wherein the synchronization signal extracting unit extracts a period of a synchronization signal of the adjacent line and an uplink and downlink transmission ratio information of the synchronization signal of the adjacent line to calculate a synchronization signal period of the adjacent line, The synchronization signal of the transmission line to be synchronous change can be generated.

Wherein the synchronization signal extractor divides the interference signal into an interference signal due to the transmission signal provided to the adjacent line and an interference signal due to the reception signal provided to the adjacent line, It is possible to extract the synchronization signal uplink / downlink transmission ratio information of the adjacent line.

The synchronization signal extractor may classify a signal having an intensity of the interference signal equal to or greater than a threshold value as an interference signal due to the transmission signal and a signal having an intensity of the interference signal equal to or lower than a threshold value as an interference signal due to the reception signal.

The interference mitigation device may be installed in a concentrator for providing Internet service to a terminal through a bundle cable within an access period.

The interference mitigation apparatus may further include a transmission / reception unit for transmitting / receiving data to / from the terminal, and the transmission / reception unit may transmit the data to the terminal according to a synchronization signal of the synchronization change subject transmission line.

The transmission / reception unit may transmit synchronization signal information including a period of a synchronization signal of the synchronization change subject transmission line and an uplink / downlink transmission ratio to the terminal.

The transmission / reception unit may receive the data transmitted from the terminal according to a synchronization signal of the transmission line to be synchronized.

The interference mitigation device may be installed in a terminal located in a customer premises where Internet service is provided.

Wherein the interference mitigation device transmits data to the concentrator in accordance with a synchronization signal of the transmission line to be synchronized, and transmits synchronization signal information including a period of a synchronization signal of the transmission line to be synchronized and an uplink / Device.

According to an embodiment of the present invention, in a system in which at least two concentrators providing different communication technologies provide communication services to subscribers using the same bundle cable, the interference in the bundle cable is mitigated, The interference can be minimized to provide a gigabit communication service technology to the user.

1 is an exemplary diagram of an Internet-provided network environment.
2 is a view for explaining crosstalk occurring in a bundle cable.
3 is a diagram illustrating an example of a synchronization signal provided to minimize interference in a network providing method using the TDD scheme.
4 is a block diagram briefly showing a configuration of an interference mitigation apparatus according to an embodiment of the present invention.
5 is an exemplary view of the intensity of the interference signal applied to the transmission line according to the distance from the concentrator.
6 is an exemplary diagram of an interference signal detected by an interference mitigation apparatus according to an embodiment of the present invention.
7 is an exemplary configuration diagram of an interference mitigation apparatus 100 according to another embodiment of the present invention.
8 is an exemplary view of the intensity of the interference signal applied to the transmission line according to the distance from the concentrator;
9 is an exemplary diagram of an interference signal detected by an interference mitigation apparatus according to another embodiment of the present invention.
10 is an exemplary flow chart of a method by which an interference mitigation device in accordance with an embodiment of the present invention mitigates interference in a bundled cable.
11 is an exemplary diagram of a hardware configuration of an interference mitigation apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. Also, the terms " part, "" module," and " module ", etc. in the specification mean a unit for processing at least one function or operation and may be implemented by hardware or software or a combination of hardware and software have.

2 is a view for explaining crosstalk occurring in a bundle cable, and FIG. 3 is a diagram for explaining a crosstalk occurring in a bundle cable in order to minimize interference in a network providing method using a TDD scheme And shows an example of a synchronization signal.

As shown in FIG. 1, a network structure for providing a gigabit Internet generally includes a transmitting terminal 10 including a first concentrator 10A and a second concentrator 10B, a first terminal 20A, A receiving terminal 20 including a second terminal 20B, and a bundle cable 30.

The first concentrator 10A and the second concentrator 10B are for providing a home network service to the first terminal 20A and the second terminal 20B respectively in the access network and are located at the network operator side , And are connected to the upper communication devices 40A and 40B, respectively.

It is assumed that the first concentrator 10A and the second concentrator 10B are concentrators that do not share a synchronous signal. For example, each of the first concentrator 10A and the second concentrator 10B may be connected to a communication device operated by a different communication provider. In this embodiment, each of the first concentrator 10A and the second concentrator 10B can provide Internet service using different communication standards, and GiGA Wire and G .fast is taken as an example, but the present invention is not necessarily limited thereto. The first concentrator 10A and the second concentrator 10B may be network devices that transmit and receive data according to a Time Division Duplexing (TDD) scheme.

The first terminal 20A and the second terminal 20B are terminal devices of the first concentrator 10A and the second concentrator 10B and the first concentrator 10A and the second concentrator 10B, And is physically connected via a bundle cable 30, and is located on the user side.

The bundle cable 30 provides a physical connection between the at least one first concentrator 10A and the second concentrator 10B and the plurality of first terminals 20A and second terminals 20B, A plurality of copper wires are provided in a bundled form. For example, some access networks may consist of more than twenty-four pairs of bundled cables.

Referring to FIG. 2, a crosstalk may leak due to leakage of signal current from an adjacent line, and may be divided into a far-end crosstalk (NEXT) and a far end crosstalk (FEXT).

In the structure in which the transmission line 10 is connected to the reception line 20 by the copper line, the near-end crosstalk is a phenomenon that the signal current transmitted from the transmission terminal 10 is generated by providing an interference component to the line near the transmission terminal 10, Crosstalk is a phenomenon that the signal current transmitted from the transmitting terminal 10 is generated by providing an interference component to the line near the receiving terminal 20. [

Generally, near-end crosstalk has a large influence on the adjacent line because it transmits a relatively large signal at the transmitting side. . On the contrary, far-end crosstalk has a small influence on the adjacent line because it receives a signal having a relatively smaller size than the transmission signal of the adjacent line on the reception side.

In order to minimize near-end crosstalk from the adjacent copper line, the TX / RX synchronization technique is applied in Time Division Duplexing (TDD).

That is, referring to FIG. 3, the data transmission technique using the time division transmission scheme switches transmission / reception intervals of data signals with a short time interval. In this case, when each data provided through the plurality of transmission lines is provided in a different transmission scheme, a period in which the transmission interval Tx of the transmission line overlaps the reception interval Rx of the adjacent line occurs. When one of the transmission lines receives data, when the adjacent line transmits data, a leaked signal from the adjacent line enters the transmission line, and the leakage signal interferes with the data transmission of the transmission line.

In order to provide a high-quality network service to a subscriber through a bundle cable, transmission and reception periods and transmission / reception intervals of data signals of a plurality of transmission lines must be matched using a synchronization signal.

When the network service provider monopolizes the bundle cable and uses the bundle cable alone, it can provide synchronization signals such as a MAC cycle to the plurality of concentrators 10, thereby matching the transmission / reception period and transmission / reception period.

However, when the network service provider shares the bundle cable with the heterogeneous network service provider, it is difficult to match the transmission / reception period and the transmission / reception period because the synchronization signal provided by the network service provider is different from the synchronization signal characteristic of the heterogeneous network service provider.

Therefore, when the bundle cable is shared, there is a problem that it is difficult to provide a network service having excellent characteristics coexisting with different network service providers.

Accordingly, it is an object of the present invention to provide an interference mitigation apparatus and an interference mitigation method using the same that can provide excellent network services by minimizing interference signals from adjacent lines even when sharing the same bundle cable with heterogeneous network service providers.

4 is a block diagram briefly showing a configuration of an interference mitigation apparatus according to an embodiment of the present invention. At this time, the interference mitigation apparatus 100 only shows a schematic configuration required for explanation according to the embodiment of the present invention, and is not limited to this configuration.

The interference mitigation apparatus 100 according to an embodiment of the present invention can be installed in the aggregation apparatuses 10A and 10B or can control the aggregation apparatuses 10A and 10B in cooperation with the aggregation apparatuses 10A and 10B. In the present embodiment, the interference mitigation apparatus 100 is a device for interfacing with the first concentrator 10A in a network structure for the first concentrator 10A to transmit and receive data to and from the first terminal 20A via the transmission line .

At this time, the second concentrator 10B transmits and receives data to and from the second terminal 20B, the data signal leaks from the adjacent line connected to the second concentrator 10B and the second terminal 20B, Lt; / RTI >

Referring to FIG. 4, an interference mitigation apparatus 100 according to an embodiment of the present invention includes an interference signal detector 110, a synchronization signal extractor 120, and a synchronization signal generator 130.

The interference signal detection unit 110 detects an interference signal derived from an adjacent line of a transmission line that is a synchronization change object, while there is no traffic transmission / reception on the transmission line as a synchronization change object. The interference signal can be received from the bundle-side transmitter-receiver 13 in the first concentrator 10A connected to the bundle cable 30 and transmitting and receiving signals with the receiver 20.

The transmission line may be a transmission medium such as a telephone line, a UTP, a coaxial cable, or an optical cable.

The synchronization signal extraction unit 120 may filter and process the interference signal detected by the interference signal detection unit 110 to extract the characteristics of the synchronization signal applied to the adjacent line. The characteristics of the synchronous signal may include a period of the synchronous signal, a frequency, and an uplink / downlink transmission ratio.

The synchronization signal generating unit 130 may generate a synchronization signal to be provided to the transmission line using the synchronization signal characteristic applied to the adjacent line extracted by the synchronization signal extraction unit 120. [ The synchronization signal generation unit 130 may transmit the synchronization signal to the signal processing unit 12 in the first concentrator 10A.

The signal processing unit 12 can transmit the signal transmitted from the communication device 40 to the bundle cable 30 through the bundle side transceiver unit 13 via a predetermined process.

The synchronization signal generating unit 130 can generate a synchronization signal of the transmission path by directly applying the synchronization signal characteristics applied to the adjacent line. However, the present invention is not limited thereto, and it is possible to generate a separate clock signal which may not interfere with the synchronization signal applied to the adjacent line.

That is, the interference mitigation apparatus 100 according to the present embodiment detects and analyzes an interference signal generated or induced in a transmission line connected to the first concentrator 10A in cooperation with the first aggregation apparatus 10A, The synchronization signal provided by the concentrator 10B can be extracted. The synchronizing signal is used as the synchronizing clock of the first concentrator 10A through the synchronizing signal, so that the synchronizing signal with the adjacent line can be synchronized and the interference in the bundle cable can be alleviated.

Hereinafter, a method of extracting a synchronization signal applied to an adjacent line using an interference signal extracted from a transmission line by an interference mitigation apparatus according to an embodiment of the present invention will be described in more detail.

5 is an exemplary view illustrating an intensity of an interference signal applied to a transmission path according to a distance from the concentrator, and FIG. 6 is an exemplary view of an interference signal detected by the interference mitigation device according to an embodiment of the present invention.

5, the interference signal applied to the transmission line according to the distance from the concentrator may be a component in which two kinds of signal components are combined. One is that the second concentrator 10B is connected to the second terminal 20B And the other is an interference signal due to a reception signal transmitted from the second terminal 20B to the second concentrator 10B.

5A, the interference signal due to the transmission signal transmitted from the second concentrator 10B to the second terminal 20B attenuates according to the transmission distance, and as the distance from the transmission terminal 10 increases, . Referring to FIG. 5B, the interference signal due to the reception signal transmitted from the second terminal 20B to the second concentrator 10B attenuates according to the transmission distance, and as the distance from the transmission terminal 10 approaches, .

Referring to FIG. 5C, the interference signal measured by the first concentrator 10A side has a relatively large intensity due to the attenuation characteristic of the signal, and the interference signal induced by the transmission signal of the second concentrator 10B has a relatively high intensity , The interference signal induced by the received signal of the second concentrator 10B has a relatively small intensity.

Accordingly, in the Internet providing system for transmitting and receiving data according to the TDD transmission method, the interference signal measured by the interference canceller 100 on the transmission line on the side of the first concentrator 10A is relatively large And a certain time may have a square wave form in which a section having a relatively small intensity is mixed.

The interference mitigation apparatus 100 according to an embodiment of the present invention is a transmission interval in which a period in which the intensity of a signal has a relatively high intensity is transmitted from the second concentrator 10B to the second terminal 20B, Can be determined as a reception interval transmitted from the second terminal 20B to the second concentrator 10B.

The interference mitigation apparatus 100 can detect the ratio and the period of the transmission interval and the reception interval and extract the characteristic information of the synchronization signal applied to the adjacent line.

The temporal ratio of the interval in which the intensity of the signal is relatively large and the interval in which the intensity of the signal is relatively large may vary depending on the uplink and downlink transmission ratio provided in the adjacent line. 6 shows an example in which an asymmetric square wave having an 8: 2 duty ratio is detected in an uplink / downlink transmission ratio Tx: Rx = 8: 2 provided in an adjacent line and an interference signal is detected in an uplink / downlink transmission ratio Is 1: 1, the interference signal detected by the interference canceller 100 may be a waveform of a symmetrical square wave form.

7 is an exemplary configuration diagram of an interference mitigation apparatus 100 according to another embodiment of the present invention. At this time, the interference mitigation apparatus 100 only shows a schematic configuration required for explanation according to the embodiment of the present invention, and is not limited to this configuration.

Referring to FIG. 7, the interference mitigation apparatus 100 according to another embodiment of the present invention includes an interference signal detector 110, a synchronization signal extractor 120, and a synchronization signal generator 130.

The interference signal detecting unit 110 detects the interference signal from the bundle side transceiver unit 23 in the first terminal 20A connected to the bundle cable 30 and transmits and receives signals to and from the first concentrator apparatus 10A, , It is possible to detect an interference preference derived from an adjacent line from a transmission medium such as a telephone line, a UTP, a coaxial cable, or an optical cable.

The signal processing unit 22 can filter and process the interference signal detected by the interference signal detecting unit 110 to extract the characteristics of the synchronization signal applied to the adjacent preference. That is, it is possible to analyze characteristics of the synchronization signal such as the period, frequency, and up / down transmission ratio of the synchronization signal.

The synchronization signal generating unit 130 may generate a synchronization signal to be provided to the transmission line using the synchronization signal characteristic applied to the adjacent line extracted by the synchronization signal extraction unit 120. [ The synchronization signal generation unit 130 may transmit the synchronization signal to the signal processing unit 22 in the terminal 20.

The signal processing unit 22 may set a data transmission schedule to the concentrator 10 according to the synchronizing signal generated by the synchronizing signal generator 130 and may transmit the data signal to the concentrator 10 in accordance with the transmission schedule.

At this time, the set transmission schedule information is included in the header of the data packet and is transmitted to the first concentrator 10A, and the first concentrator 10A transmits the data signal to the first terminal 20A in accordance with the transmission schedule It is possible to more precisely match the data transfer cycle between the first concentrator 10A and the first terminal 20A.

That is, the interference mitigation apparatus 100 according to another embodiment of the present invention detects and analyzes an interference signal generated or induced in a transmission line connected to a first terminal (first antenna 20) in cooperation with a first terminal 20A The synchronizing signal applied to the adjacent line is extracted and the extracted synchronizing signal is provided as the synchronizing clock of the first terminal 20A so that the synchronizing signal with the adjacent line can be matched so that the occurrence of interference in the bundle cable can be minimized.

Hereinafter, a method of extracting a synchronization signal applied to an adjacent line using an interference signal extracted from a transmission line by an interference mitigation apparatus according to another embodiment of the present invention will be described in more detail.

FIG. 8 is an exemplary view of the intensity of an interference signal applied to a transmission path according to a distance from the concentrator, and FIG. 9 is an exemplary view of an interference signal detected by an interference mitigation apparatus according to another embodiment of the present invention.

Referring to FIG. 8, as described in FIG. 5, the interference signal applied to the transmission line may be a signal in which two types of signal components are combined.

That is, one is an interference signal due to a transmission signal transmitted from the second concentrator 10B to the second terminal 20B side and the other is an interference signal transmitted from the second terminal 20B to the second concentrator 10B May be an interference signal due to the signal.

Referring to FIG. 8A, the interference signal due to the transmission signal transmitted from the second concentrator 10B to the second terminal 20B is attenuated according to the transmission distance, and decreases as the distance from the transmission terminal 10 increases. That is, the distance from the receiving end 20 decreases.

Referring to FIG. 8B, the interference signal due to the reception signal transmitted from the second terminal 20B to the second concentrator 10B is decreased according to the transmission distance, and decreases with increasing distance from the reception terminal 20 . That is, the distance from the transmitting end 10 is decreased.

Referring to FIG. 8C, the interference signal measured at the first terminal 20A side has a relatively small intensity of the interference signal induced by the transmission signal of the second concentrator 10B according to the attenuation characteristic of the signal, The interference signal induced by the reception signal of the second concentrator 10B has a relatively large intensity.

Accordingly, in the Internet providing system for transmitting and receiving data according to the TDD transmission method, the interference signal measured by the interference mitigation apparatus 100 on the transmission line on the first terminal 20A side is relatively large And a certain time may have a square wave form in which a section having a relatively small intensity is mixed.

In the interference mitigation apparatus 100 according to another embodiment of the present invention, the interval in which the intensity of the signal has a relatively high intensity is a reception interval transmitted from the second terminal 20B to the second concentrator 10B, Can be determined as a transmission interval transmitted from the second concentrator 10B to the second terminal 20B.

The interference mitigation apparatus 100 can detect the ratio and the period of the transmission interval and the reception interval and extract the characteristic information of the synchronization signal applied to the adjacent line.

The time ratio of the interval in which the intensity of the signal is relatively large and the interval in which the intensity of the signal is relatively large may vary depending on the uplink / downlink transmission ratio provided in the adjacent line. 6 shows an example in which an asymmetric square wave having an 8: 2 duty ratio is detected in the uplink and downlink transmission ratio Tx: Rx = 8: 2 provided in the adjacent line and the interference signal is provided in the adjacent line If the provided uplink / downlink transmission ratio is 1: 1, the interference signal detected by the interference canceller 100 may be a waveform in the form of a symmetric square wave.

10 is an exemplary flow chart of a method by which an interference mitigation device in accordance with an embodiment of the present invention mitigates interference in a bundled cable.

Referring to FIG. 10, an interference mitigation apparatus 100 according to an embodiment of the present invention includes a first

And can be installed outside or inside the concentrator 10A to control the first concentrator 10A.

First, the interference canceller 100 detects an interference signal flowing into the transmission line from the adjacent line (S110).

The transmission line may be, for example, a transmission medium such as a telephone line, a UTP, a coaxial cable, or an optical cable, or may be any line in a bundled cable in which a plurality of transmission lines are bundled.

In the bundle cable, the transmission line may leak an interference signal due to leakage of signal current from an adjacent line. At this time, the interference signal is transmitted from the second concentrator 10B to the second terminal 20B through the adjacent line, the near-end crosstalk component transmitted from the second terminal 20B to the transmitting terminal 10, The signal current transmitted to the second concentrator 10B may include a far-end crosstalk component transmitted to the receiving end.

The interference mitigation apparatus 100 extracts the synchronization signal provided to the adjacent line from the interference signal (S120). As described in FIG. 5, the transmission signal has a characteristic of attenuating according to the signal transmission distance.

Therefore, the interference signal flowing into the transmission terminal 10 side is transmitted to the second terminal 20B when the strength of the near-end crosstalk component signal due to the transmission signal transmitted from the second concentrator 10B to the second terminal 20B through the adjacent line is low, Crosstalk component signal intensity due to a reception signal transmitted from the second line concentrator 10B to the second concentrator 10B through the adjacent line.

In the network structure for providing the data signal according to the TDD scheme, the interference signal measured by the first concentrator 10 has a relatively large intensity for a predetermined time, and a square wave having a relatively small intensity (Square wave) shape.

The interference canceller 100 is a transmission interval in which the intensity of the signal having a relatively high intensity is transmitted from the second concentrator 10B to the second terminal 20B, Can be determined as a reception interval transmitted from the second terminal 20B to the second concentrator 10A. By detecting the ratio and the period of the transmission interval and the reception interval, the characteristic information of the synchronization signal applied to the adjacent line is extracted .

Then, the interference mitigation apparatus 100 generates a synchronization signal to be provided to the transmission line using the synchronization signal provided in the adjacent line (S130).

At this time, the interference canceller 100 can generate a synchronization signal to which the synchronization signal characteristic applied to the adjacent line is directly applied.

However, the present invention is not limited to this, and a new synchronization signal may be generated to generate a transmission schedule that minimizes interference with an adjacent line using a synchronization signal applied to the adjacent line.

11 is an exemplary diagram of a hardware configuration of an interference mitigation apparatus according to an embodiment of the present invention.

11, an interference mitigation apparatus 100 according to an embodiment of the present invention includes hardware such as a memory device 102, a storage device 104, a communication device 106, and a processor 108 And stores a program that is executed in combination with hardware at a specified location.

The processor 108 communicates with and controls the memory device 102 and the communication device 106. The processor 108 loads the program stored in the memory device 102 and transfers the data to and from the bundle cable 10 and the terminal 20 via the communication device 106, A synchronization signal for mitigating interference can be generated.

At this time, the processor 108 can generate a synchronization signal by reading and writing data required for the operation of the concentrator 10 and the terminal 20 to the storage device 104. [

The memory device 102 is hardware that stores various information necessary for the operation of the processor 108. [ The memory device 102 may store an operating system (OS) for driving the processor 108, a concentrator 10 described in the present invention, and a program for various operations of the terminal 20. [

The communication device 106 is hardware for a physical connection with an external device. In this embodiment, the communication device 106 is connected to the concentrator 10 and the terminal 20 via a wire / wireless connection for connection between the concentrator 10 and the terminal 20 to generate a synchronization signal for data transmission / reception schedules of the terminal 20, And a wireless communication interface.

As described above, in the interference mitigation apparatus according to the embodiment of the present invention, at least two concentrators providing different communication technologies provide communication services to subscribers using the same bundle cable, interference caused by adjacent lines Analyzes the synchronization signal applied to the adjacent line from the interference signal, generates a new synchronization signal using the synchronization signal, and mitigates mutual interference to provide an optimal communication service.

Accordingly, in the communication service providing technology using the TDD method, it is possible to minimize the mutual interference in the same bundle cable, and to provide the gigabit communication service technology to the user.

The embodiments of the present invention described above are not implemented only by the apparatus and method, but may be implemented through a program for realizing the function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (20)

In a method for mitigating interference in a home network transmission line in which an interference mitigation apparatus transmits and receives data according to a Time Division Duplexing (TDD) scheme,
Detecting the strength of the interference signal flowing into the transmission line to be synchronized from the adjacent line for a predetermined period of time;
Estimating a synchronization signal of the adjacent line by extracting a transmission signal section and a reception signal section of the interference signal based on a graph form showing the intensity of the interference signal with respect to time;
And applying a synchronization signal of the adjacent line as a synchronization signal of the transmission line to be synchronized. The method of claim 1,
The step of applying the synchronization signal
The synchronization signal of the transmission line to be synchronized is generated using the period of the synchronization signal of the adjacent line and the transmission ratio of the synchronization signal of the adjacent line. The method of claim 1,
The step of estimating the synchronization signal of the adjacent line
Dividing the interference signal into an interference signal due to the transmission signal provided to the adjacent line and an interference signal due to the reception signal provided to the adjacent line;
Extracting an uplink / downlink transmission ratio of the synchronization signal of the adjacent line using an interference signal interval due to the transmission signal and a ratio of an interference signal interval due to the reception signal;
And extracting a period of a synchronization signal of the adjacent line. 4. The method of claim 3,
The step of distinguishing the interference signal comprises:
A signal having an intensity of the interference signal equal to or higher than a threshold value is classified into an interference signal due to the transmission signal,
Wherein the interference signal is classified into an interference signal due to the reception signal. The method of claim 1,
The interference mitigation device
And an aggregation device for providing an internet service to a terminal through a bundle cable within an access section. The method of claim 5,
And transmitting data to the terminal according to a synchronization signal of the transmission line to be synchronized. The method of claim 6,
Transmitting synchronization signal information including a period of a synchronization signal of the synchronization change subject transmission line and an uplink / downlink transmission ratio to the terminal; and
Further comprising the step of receiving data transmitted from the terminal according to a synchronization signal of the transmission line to be synchronized. The method of claim 1,
The interference mitigation device
An interference mitigation method installed in a terminal located in a customer premises where an Internet service is provided. In claim 8
And transmitting data to the concentrator in accordance with the synchronizing signal of the transmission line to be synchronous alteration. The method of claim 9,
Transmitting synchronization signal information including a period of a synchronization signal of the transmission line to be synchronized and an uplink / downlink transmission ratio to the concentrator; and
And receiving data transmitted from the concentrator in accordance with a synchronization signal of the synchronization change object transmission line. An interference mitigation apparatus for mitigating interference in a home network transmission line transmitting and receiving data according to a time division duplexing (TDD) scheme,
An interference signal detector for detecting the intensity of the interference signal flowing into the transmission line to be synchronized from the adjacent line for a predetermined time,
A synchronization signal extracting unit for extracting a transmission signal section and a reception signal section of the interference signal based on a graph form showing the intensity of the interference signal with respect to time to estimate a synchronization signal of the adjacent line;
And a synchronization signal generator for applying the synchronization signal of the adjacent line as a synchronization signal of the synchronization change object transmission line. 12. The method of claim 11,
The synchronization signal extracting unit
A period of a synchronization signal of the adjacent line, and an uplink / downlink transmission ratio information of the synchronization signal of the adjacent line,
And generates a synchronization signal for the synchronization change object transmission line using the period of the synchronization signal of the adjacent line and the transmission rate of the synchronization signal of the adjacent line. The method of claim 12,
The synchronization signal extracting unit
The interference signal is divided into an interference signal due to the transmission signal provided to the adjacent line and an interference signal due to the reception signal provided to the adjacent line, and an interference signal section due to the transmission signal and an interference signal section And extracts the synchronization signal uplink / downlink transmission ratio information of the adjacent line using the ratio. The method of claim 13,
The synchronization signal extracting unit
A signal having an intensity of the interference signal equal to or higher than a threshold value is classified into an interference signal due to the transmission signal,
Wherein the interference signal is classified into an interference signal due to the reception signal. 12. The method of claim 11,
The interference mitigation device
An interference mitigation device installed in a concentrator for providing an Internet service to a terminal through a bundle cable within an access interval. 16. The method of claim 15,
Further comprising a transmission / reception unit for transmitting / receiving data with the terminal,
The transmitting /
And transmits the data to the terminal according to a synchronization signal of the transmission line to be synchronized. 17. The method of claim 16,
The transmitting /
And transmits the synchronization signal information including the period of the synchronization signal of the transmission line to be synchronized and the uplink / downlink transmission ratio to the terminal. The method of claim 17,
The transmitting /
And receives the data transmitted in accordance with a synchronization signal of the transmission line to which synchronization is to be changed from the terminal. 12. The method of claim 11,
The interference mitigation device
An interference mitigation device installed in a terminal located in a customer premises where an Internet service is provided. 20. The method of claim 19,
The data is transmitted to the concentrator in accordance with the synchronization signal of the transmission line to be synchronized,
And transmits synchronizing signal information including a period of a synchronizing signal of the transmission line to be synchronized and an uplink / downlink transmission ratio to the concentrator.

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