WO2018012819A1

WO2018012819A1 - Method and device for avoiding coexistence interference between heterogeneous techniques within bundle cable

Info

Publication number: WO2018012819A1
Application number: PCT/KR2017/007346
Authority: WO
Inventors: 박노욱; 박형진
Original assignee: 주식회사 케이티
Priority date: 2016-07-13
Filing date: 2017-07-10
Publication date: 2018-01-18

Abstract

A method by which a coexistence device transmits, to a terminal, data signals outputted from different line concentrators in a home network transmission line comprises the steps of: receiving a first data signal from a first line concentrator and receiving a second data signal from a second line concentrator; extracting a transmission period of the first data signal so as to estimate a frequency of a first synchronization signal, which is a synchronization signal of the first data signal, and extracting a transmission period of the second data signal so as to estimate a frequency of a second synchronization signal, which is a synchronization signal of the second data signal; generating a coexistence synchronization signal by using the frequency of the first synchronization signal and the frequency of the second synchronization signal; and respectively transmitting the first data signal and the second data signal to a first terminal and a second terminal in correspondence to the coexistence synchronization signal.

Description

Method and apparatus for avoiding coexistence interference between different technologies in bundle cables

The present invention relates to a method and apparatus for avoiding coexistence interference between heterogeneous technologies in a bundle cable.

Representative methods for providing 100 mega-speed high-speed Internet service include x Digital Subscriber Line (xDSL) using copper wire and FTTx (Fiber To The x) using optical cable.

Recently, ISPs (Internet Service Providers) are competing to overcome the barriers of speed and provide faster speeds from the high-speed Internet to the Giga-Internet. GiGA Wire based on G.hn to convert the existing high-speed Internet into the Giga Internet. Or a technique such as G.fast is used.

In an access network, when a large number of copper wires are bundled to accommodate a large number of subscribers, a large amount of interference occurs between the copper wires in the bundle cable.

In particular, the GiGA Wire and G.fast technologies for providing the Giga Internet are technologies that can provide the Giga Internet based on the telephone line, but since each technology has different methods for mitigating interference, the two technologies use the same bundled cable. In this case, significant quality degradation occurs, making it difficult to use within the same bundle cable.

On the other hand, even when different communication service providers provide Internet services using the same technology in the same bundle cable, since mutual communication devices are used, transmission / reception synchronization may be inconsistent, thereby causing mutual interference signals.

The problem to be solved by the present invention is to minimize the interference signal coming from the adjacent line in the same bundle cable for providing the Giga Internet to coexistence interference between heterogeneous technologies in the bundle cable so that heterogeneous technologies can coexist in the same bundle cable METHOD AND APPARATUS FOR AVOIDING IN-BUNDLE CABLE COEXISTENCE INTERFERENCE.

According to an embodiment of the present invention, a method for transmitting a data signal output from different concentrators to a terminal by minimizing coexistence interference in a cable may be received from a first concentrator, and a second data signal may be received. Receiving a second data signal from a concentrator, extracting a transmission period of the first data signal, estimating a frequency of a first synchronization signal that is a synchronization signal of the first data signal, and transmitting a transmission period of the second data signal Estimating a frequency of the second synchronization signal, which is a synchronization signal of the second data signal, and generating a coexistence synchronization signal using the frequency of the first synchronization signal and the frequency of the second synchronization signal; And transmitting the first data signal and the second data signal to the first terminal and the second terminal, respectively, in accordance with the coexistence synchronization signal. And a step.

The first concentrating device and the second concentrating device may be connected to communication devices operated by different communication providers or communication devices using different transmission schemes.

The first concentrator and the second concentrator may be network devices that transmit and receive data according to a time division transmission scheme.

The coexistence apparatus for transmitting data signals output from different concentrators according to an embodiment of the present invention to a terminal by minimizing coexistence interference in a cable may include a first data signal output from a first concentrator and a second concentrator. A synchronization signal extractor configured to estimate a first synchronization signal that is a synchronization signal of the first data signal using the output second data signal, and estimate a second synchronization signal that is a synchronization signal of the second data signal, and the second signal; And a sync signal generator configured to generate a coexistence sync signal using the first sync signal and the second sync signal.

The coexistence apparatus may include a buffer configured to store the first data signal and the second data signal, the first data signal stored in the buffer, and the second data signal according to the coexistence synchronization signal, and It may further include a control unit for controlling to transmit to the second terminal.

The first concentrating device and the second concentrating device may be connected to communication devices operated by different communication providers or communication devices using different transmission methods, and may be network devices that transmit and receive data according to time division transmission methods. .

A coexistence apparatus operated by at least one processor according to an embodiment of the present invention includes a communication unit configured to receive a first data signal and a second data signal output from different concentrators, and a program for transmitting the data signal. And a processor configured to execute an operation implemented in the program in association with the memory, the communication unit, and the memory, wherein the program comprises the first data signal from the first data signal and the second data signal received from the communication unit. Extracting a first synchronous signal which is a synchronous signal of and a second synchronous signal which is a synchronous signal of the second data signal, and using the first synchronous signal and the second synchronous signal, the first data signal and the second synchronous signal And instructions for generating a coexistence synchronization signal for transmitting the data signal.

The program may further include instructions for transmitting the first data signal and the second data signal to a terminal according to the coexistence synchronization signal.

According to an embodiment of the present invention, in a communication service providing technology for transmitting data on a copper wire using a TDD scheme, it is possible to provide a giga-class communication service technology to a user by minimizing mutual interference in the same bundle cable.

1 is an exemplary diagram of a giga internet providing network environment.

2 is a diagram illustrating 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 scheme using a TDD scheme.

4 is an exemplary diagram of a network structure to which a coexistence apparatus is applied according to an embodiment of the present invention.

5 is an internal configuration diagram of a coexistence apparatus according to an embodiment of the present invention.

6 is a diagram illustrating an example of a coexistence synchronization signal provided by a coexistence apparatus according to an embodiment of the present invention.

7 is an exemplary flowchart of a method for transmitting a data signal to a terminal by a coexistence apparatus according to an embodiment of the present invention.

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

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise. In addition, the terms “… unit”, “… unit”, “module”, etc. described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software. have.

FIG. 1 is a diagram illustrating a network structure for providing a giga internet, FIG. 2 is a diagram illustrating crosstalk occurring in a bundle cable, and FIG. 3 is provided to minimize interference in a network providing scheme using a TDD scheme. It is a figure which shows the example of a synchronization signal.

In general, as shown in FIG. 1, a network structure for providing a giga internet includes a transmitter 10, a first terminal 20A, and a first concentrator 10A and a second concentrator 10B. The receiver 20 includes a second terminal 20B, and a bundle cable 30.

The first concentrator 10A and the second concentrator 10B are for providing home network services to the first terminal 20A and the second terminal 20B in the access network, respectively. , Respectively, are connected to the upper communication devices 40A and 40B.

It is assumed that the first condenser 10A and the second concentrator 10B are concentrators that do not share a synchronization signal. For example, each of the first concentrator 10A and the second concentrator 10B may be connected to a communication device operated by different communication providers. In the present embodiment, each of the first concentrator 10A and the second concentrator 10B may provide an Internet service using different communication standards, and GiGA Wire and G based on G.hn as a communication standard. Although .fast is taken as an example, 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 condenser 10A and the second condenser 10B, and the first condenser 10A and the second condenser 10B. And are physically connected via the bundle cable 30 and are 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 the second terminal 20B, A plurality of copper wires are provided in a bundled form. For example, some access networks may consist of more than 24 pairs of bundled cables.

Referring to FIG. 2, crosstalk may occur due to leakage of signal current from an adjacent line, and may be classified into near end crosstalk (NEXT) and far end crosstalk (FEXT).

In the structure connected by the copper wire line between the transmitting end 10 and the receiving end 20, near-end crosstalk is a phenomenon in which the signal current transmitted from the transmitting end 10 provides an interference component to a line near the transmitting end 10. Crosstalk is a phenomenon caused by the signal current transmitted from the transmitter 10 providing an interference component to a line near the receiver 20.

In general, near-end crosstalk has a large impact on adjacent lines because the transmitting side transmits a relatively large signal. On the contrary, far-end crosstalk has a smaller effect on the adjacent line because the receiving side receives a signal having a smaller size than the transmission signal of the adjacent line.

In order to minimize near-end crosstalk from adjacent copper lines, TX / RX synchronization technology is applied in time division duplexing (TDD).

That is, referring to FIG. 3, the data transmission technology to which the time division transmission scheme is applied switches the transmission / reception interval of the data signal at short time intervals. In this case, when data provided through a plurality of transmission lines are provided in different transmission schemes, a section in which a transmission section Tx of a transmission line overlaps with a reception section Rx of an adjacent line occurs. When either transmission line receives data, when the adjacent line transmits data, a signal leaked from the adjacent line flows into the transmission line, and the leakage signal interferes with data transmission of the transmission line.

Therefore, in order to provide a high quality network service to a subscriber through a bundle cable, it is necessary to match the transmission / reception period and the transmission / reception interval of data signals of a plurality of transmission lines using a synchronization signal.

When the network service provider exclusively uses the bundled cable, the transmit / receive period and the transmit / receive period may be matched by providing a synchronization signal such as a MAC cycle to the plurality of concentrators 10A and 10B.

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

For this reason, in the case of sharing a bundle cable, it is difficult to coexist with different network service providers to provide a network service having excellent characteristics.

Accordingly, the present invention is to provide an interference mitigation device and an interference mitigation method using the same, which can provide excellent network services by minimizing interference signals coming from adjacent lines even if they share the same bundle cable with other network service providers.

Referring to FIG. 4, in the coexistence apparatus 100 according to an embodiment of the present invention, the first concentrator 10A is connected to the concentrators 10A and 10B from the first concentrator 10A to the first terminal. A first data signal transmitted to 20A and a second data signal transmitted from the second concentrator 10B to the second terminal 20B are received from the second concentrator 10B.

The coexistence apparatus 100 stores the first data signal and the second data signal in a buffer, and extracts synchronization signals of each data signal using the stored first data signal and the second data signal.

The coexistence apparatus 100 generates a synchronization signal for operating the coexistence apparatus 100 using the extracted period of the synchronization signals.

The synchronization signal newly generated by the coexistence apparatus 100 is transferred to a buffer inside the coexistence apparatus 100 to simultaneously output the first data signal and the second data signals.

The coexistence apparatus 100 according to an embodiment of the present invention generally includes a coexistence apparatus capable of accommodating both aggregation apparatuses applying different communication technologies while maintaining a network structure for providing a service by the communication service provider to the terminal. By controlling each data signal to be synchronized and transmitting simultaneously, inter-line interference can be minimized in the same bundle cable.

5 is a diagram illustrating an internal configuration of a coexistence apparatus according to an embodiment of the present invention, and FIG. 6 is a diagram illustrating an example of a coexistence synchronization signal provided by the coexistence apparatus according to an embodiment of the present invention.

Referring to FIG. 5, the coexistence apparatus 100 according to an embodiment of the present invention may include a first receiver 110A, a second receiver 110B, a first buffer 120A, a second buffer 120B, and a first buffer. The transmitter 130A, the second transmitter 130B, and the controller 140 are included.

The first receiver 110A and the second receiver 110B may receive the first data signal and the second data signal from the first concentrator 10A and the second concentrator 10B, respectively.

The first buffer 120A and the second buffer 120B may temporarily store the first data signal and the second data signal received by the first receiver 110A and the second receiver 110B.

The first transmitter 130A and the second transmitter 130B transmit the first data signal and the second data signal to the first terminal 20A and the second terminal according to the coexistence synchronization signal generated by the controller 140. 20B).

The controller 140 may include a sync signal extractor 142 and a sync signal generator 144.

The synchronization signal extractor 142 filters and processes the first data signal and the second data signal received by the first receiver 110A and the second receiver 110B, and thus the characteristics of the sync signal applied when the respective data signals are transmitted. Can be extracted. The characteristic of the synchronization signal may include frequency information of the synchronization signal.

The synchronization signal generator 144 uses the specification of the synchronization signal applied when the concentrators 10A and 10B extracted by the synchronization signal extractor 142 transmit the first data signal and the second data signal, respectively. And a coexistence synchronization signal for transmitting the second data signal to the terminals 20A and 20B.

In this case, the coexistence synchronization signal may be connected to a communication device operated by different carriers so that the first data signal and the second data signal transmitted according to the synchronization signal having different frequencies may not cause interference in the same bundle cable. It means a synchronization signal.

In this embodiment, the frequency of the coexistence synchronization signal may be set to a minimum common multiple of the frequency of the first data signal and the frequency of the second data signal.

Referring to FIG. 6, in a network providing structure according to an embodiment of the present invention, a transmission frequency of a first data signal provided by the first concentrator 10A to the first terminal 20A is 40 Hz, and the second concentrator The transmission frequency of the second data signal provided by the 10B to the second terminal 20B may be 60 Hz.

The coexistence apparatus 100 according to an embodiment of the present invention may set the frequency of the coexistence synchronization signal to the minimum common multiple (120 Hz) of the transmission frequency (40 Hz) of the first data signal and the transmission frequency (60 Hz) of the second data signal. have.

The coexistence apparatus 100 may transmit the first data signal and the second data signal to the terminals 20A and 20B according to the coexistence synchronization signal having a frequency of 120 Hz.

Accordingly, when the network service provider shares a bundle cable with another network service provider, even if the network service providers apply different synchronization signals to each other, a coexistence synchronization signal can be generated to reduce interference with each other. By transmitting a signal, it is possible to provide excellent network services by minimizing mutual interference.

Hereinafter, a method in which a coexistence apparatus according to an embodiment of the present invention transmits a data signal to a terminal by minimizing interference in a bundle cable will be described.

Referring to FIG. 7, the coexistence apparatus 100 according to an exemplary embodiment of the present invention is installed outside the first concentrator 10A and the second concentrator 10B, and the first concentrator 10A and the first The data signal output from the second concentrator 10B may be a kind of relay device that transmits the data signal to the first terminal 20A and the second terminal 20B through the bundle cable 30.

First, the coexistence apparatus 100 receives the first data signal and the second data signal output from the first concentrator 10A and the second concentrator 10B (S110).

The first concentrator 10A and the second concentrator 10B may be network devices operated by a communication service provider that provides network services according to different communication technologies. In this case, the first data signal and the second data signal may be transmitted according to synchronization signals having different frequencies and up-down transmission rates.

However, the present invention is not necessarily limited thereto, and the first concentrator 10A and the second concentrator 10B may be network devices that are physically separated and installed by the same communication service provider to provide network services. In this case, the first data signal and the second data signal may be transmitted according to a synchronization signal having the same frequency and up-down transmission ratio, but if the start time of both synchronization signals is different, the transmission interval and the reception interval overlap each other within the same bundle. Interference may occur.

The coexistence apparatus 100 extracts a first synchronization signal that is a synchronization signal of the first data signal and a second synchronization signal that is a synchronization signal of the second data signal (S120).

The coexistence apparatus 100 may detect the transmission period of the first data signal to detect the frequency information of the first synchronization signal and the transmission period of the second data signal to extract the frequency information of the second synchronization signal.

The coexistence apparatus 100 generates a coexistence synchronization signal for transmitting the first data signal and the second data signal by using the frequency of the first synchronization signal and the frequency of the second synchronization signal (S130).

In this case, the coexistence apparatus 100 may generate a coexistence synchronization signal having a frequency that is a minimum common multiple of a frequency of the first synchronization signal and a frequency of the second synchronization signal.

However, the present invention is not limited thereto, and a new synchronization signal may be generated to generate a transmission schedule that may minimize interference with adjacent lines.

The coexistence apparatus 100 transmits the first data signal and the second data signal to each of the terminals 20A and 20B according to the coexistence synchronization signal (S140).

8 is an exemplary diagram of a hardware configuration of a coexistence apparatus according to an embodiment of the present invention.

Referring to FIG. 8, the coexistence device 100 according to an embodiment of the present invention is composed of hardware including a memory device 102, a storage device 104, a communication device 106, a processor 108, and the like. The program is stored in the designated place and executed in combination with the hardware.

Processor 108 communicates with and controls memory device 102 and communication device 106. The processor 108 loads a program stored in the memory device 102 and exchanges data with a device connected through the communication device 106, in the present embodiment, the concentrating devices 10A and 10B and the terminals 20A and 20B. On receipt, it can generate a sync signal to mitigate interference in the bundle cable.

In this case, the processor 108 may generate a synchronization signal while reading and writing data necessary for performing the operations of the concentrators 10A and 10B and the terminals 20A and 20B to the storage device 104.

The memory device 102 is hardware that stores various kinds of information necessary for the operation of the processor 108. The memory device 102 may store an operating system (OS) for driving the processor 108 and programs for various operations of the concentrating devices 10A and 10B and the terminals 20A and 20B described in the present invention. .

The communication device 106 is hardware for physical connection with an external device. In this embodiment, the communication device 106 is the concentrators 10A and 10B and the concentrators 10A and 10B and the terminals 20A and 20B to generate a synchronization signal for data transmission and reception schedules of the terminals 20A and 20B. It may include a wired / wireless communication interface for the connection with the).

As such, in the coexistence apparatus 100 according to the embodiment of the present invention, at least two concentrators 10A and 10B providing different communication technologies may provide communication services to subscribers using the same bundle cable 30. In the system, an optimal communication service is obtained by mitigating mutual interference by collecting data signals transmitted from the concentrators, analyzing the synchronization signals applied at each concentrator from the data signals, and generating new coexistence synchronization signals using the synchronization signals. To provide.

Accordingly, in the communication service providing technology for transmitting data on copper wire using the TDD scheme, it is possible to provide a giga-class communication service technology to the user by minimizing mutual interference in the same bundle cable.

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

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims

In the method for the coexistence device to transmit data signals output from different concentrators to the terminal to minimize the coexistence interference in the cable,

Receiving a first data signal from a first concentrator and receiving a second data signal from a second concentrator;

Extracting a transmission period of the first data signal to estimate a frequency of a first synchronization signal that is a synchronization signal of the first data signal, and extracting a transmission period of the second data signal to be a synchronization signal of the second data signal Estimating a frequency of the second synchronization signal,

Generating a coexistence synchronization signal using the frequency of the first synchronization signal and the frequency of the second synchronization signal, and

And transmitting the first data signal and the second data signal to a first terminal and a second terminal, respectively, in accordance with the coexistence synchronization signal.
In claim 1,

The first concentrator and the second concentrator are

A transmission method connected to a communication device operated by different communication providers or a communication device using different transmission methods.
In claim 2,

The first concentrator and the second concentrator are

A transmission method, which is a network device that transmits and receives data according to a time division transmission method.
A coexistence apparatus for transmitting data signals output from different concentrators to a terminal by minimizing coexistence interference in a cable.

A first synchronization signal, which is a synchronization signal of the first data signal, is estimated using the first data signal output from the first concentrator and the second data signal output from the second concentrator. A sync signal extractor for estimating a second sync signal that is a sync signal, and

And a sync signal generator configured to generate a coexistence sync signal using the first sync signal and the second sync signal.
In claim 4,

A buffer for storing the first data signal and the second data signal, and

And a controller configured to control the first data signal and the second data signal stored in the buffer to be transmitted to a first terminal and a second terminal according to the coexistence synchronization signal.
In claim 4,

The first concentrator and the second concentrator are

Is connected to communication devices operated by different service providers or communication devices using different transmission methods,

A coexistence device that is a network device that transmits and receives data according to a time division transmission scheme.
A coexistence device operated by at least one or more processors,

Communication unit for receiving the first data signal and the second data signal output from different concentrators,

A memory for storing a program for transmitting the data signal;

And a processor configured to execute an operation implemented in the program in conjunction with the communication unit and the memory.

The program extracts a first synchronization signal that is a synchronization signal of the first data signal and a second synchronization signal that is a synchronization signal of the second data signal from the first data signal and the second data signal received by the communication unit. And generating a coexistence synchronization signal for transmitting the first data signal and the second data signal using the first synchronization signal and the second synchronization signal.
In claim 7,

The program

The coexistence apparatus further comprises instructions for transmitting the first data signal and the second data signal to the terminal according to the coexistence synchronization signal.