KR101882488B1 - Concentration apparatus and method for providing network service using the same - Google Patents

Concentration apparatus and method for providing network service using the same Download PDF

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Publication number
KR101882488B1
KR101882488B1 KR1020160132933A KR20160132933A KR101882488B1 KR 101882488 B1 KR101882488 B1 KR 101882488B1 KR 1020160132933 A KR1020160132933 A KR 1020160132933A KR 20160132933 A KR20160132933 A KR 20160132933A KR 101882488 B1 KR101882488 B1 KR 101882488B1
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South Korea
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signal
frequency band
terminal
data frame
interference
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KR1020160132933A
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Korean (ko)
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KR20180040956A (en
Inventor
박노욱
박형진
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주식회사 케이티
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Priority to KR1020160132933A priority Critical patent/KR101882488B1/en
Priority to PCT/KR2017/011267 priority patent/WO2018070812A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0041—Arrangements at the transmitter end
    • H04L1/0042—Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0047—Decoding adapted to other signal detection operation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

A method for providing a network service to a terminal according to an embodiment of the present invention includes transmitting a signal to a terminal, receiving the signal from the terminal, analyzing the signal, And classifying the degree of interference for each frequency band using the channel characteristic analysis result and encoding the data frame at different coding rates according to the degree of interference.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concentrator in a copper bundle cable environment and a network providing method using the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concentrator in a copper bundle cable environment and a method of providing an optimal performance network using the concentrator.

There is x Digital Subscriber Line (xDSL) as a typical way to provide 100 megabyte high-speed Internet service.

In recent years, Internet service provider (ISP) companies have been competing to provide faster speeds from high-speed Internet to gigabit internet over speed barriers. Various technologies are being developed to convert existing high-speed Internet into gigabit internet.

Until now, telephone lines and ADSL, VDSL, and Ethernet technology, which are UTP-based Internet technologies, have different frequency bands, so there is little interference between each other and there is no problem in providing each network service.

However, as the use frequency band is expanded to provide the Internet in recent years, there is a problem that interference occurs between the bundled cable and the frequency band used by other network providing technology, which degrades the performance. It is continuing.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a concentrator capable of providing a high-performance Internet service to an interference signal induced by an adjacent line and a method of providing an optimal performance network using the same.

A method for providing a network service to a terminal according to an embodiment of the present invention includes transmitting a signal to a terminal, receiving the signal from the terminal, analyzing the signal, And classifying the degree of interference for each frequency band using the channel characteristic analysis result and encoding the data frame at different coding rates according to the degree of interference.

The analyzing of the channel characteristics may include analyzing a signal characteristic of each of the frequency bands of the signal, a signal-to-noise ratio, a damping coefficient corresponding to a signal intensity attenuating according to a line distance, The characteristics of the channel can be analyzed based on at least one of the channel characteristics.

Wherein the coding of the data frame comprises coding a data frame of a frequency band having a degree of interference of the channel equal to or higher than a reference with a coding rate lower than a reference coding rate, The coding rate can be higher than the coding rate.

The header of the data frame may include information of a frequency band in which the payload of the data frame is divided, and a coding rate of the frequency band.

The terminal can decode the data frame using the information included in the header of the data frame.

A concentrator for providing a network service to a terminal through a bundle cable line according to an embodiment of the present invention includes a transmission medium registration unit for transmitting and receiving signals to and from the terminal, And a transmission controller for classifying the degree of interference for each frequency band using the channel characteristic analysis result and encoding the data frame at different coding rates according to the degree of interference.

Wherein the transmission control unit analyzes a signal to analyze a characteristic of a channel connected to the terminal, and classifies the degree of interference for each frequency band using the channel characteristic analysis result, And a signal generator for generating a transmission signal encoded at a predetermined rate.

Wherein the channel characteristic analyzing unit analyzes at least one of an attenuation coefficient corresponding to a signal intensity to be attenuated according to a signal intensity, a signal-to-noise ratio, and a line distance of the signal of each frequency band, a time at which the signal arrives, The characteristics of the channel can be analyzed.

Wherein the signal generator encodes a data frame of a frequency band having a degree of interference of the channel higher than a reference at a code rate lower than a reference code rate and a data frame of a frequency band having a degree of interference of the channel lower than a reference, As shown in FIG.

The header of the transmission signal may include information on a frequency band in which a payload of the data frame is divided, and a coding rate of the frequency band.

The terminal can decode the data frame using the information included in the header of the data frame.

According to an embodiment of the present invention, it is possible to provide a gigabit communication service to a user even in an interference signal induced by an adjacent line in an environment where network services are provided by sharing a bundle cable.

1 is a diagram illustrating a copper-based network structure according to an embodiment of the present invention.
2 is a block diagram briefly showing a configuration of a concentrator according to an embodiment of the present invention.
FIG. 3A is an exemplary diagram illustrating the intensity of a signal according to a frequency band of a signal transmitted from the concentrator according to an exemplary embodiment of the present invention.
FIG. 3B is an exemplary diagram illustrating a signal strength of a signal transmitted in a concentrator according to an exemplary embodiment of the present invention, the signal arriving at a terminal through a bundle cable. FIG.
FIG. 4A is an exemplary diagram illustrating the strength of a signal according to a frequency band of a signal transmitted from the concentrator according to another embodiment of the present invention. FIG.
FIG. 4B is an exemplary diagram illustrating a signal strength of a signal transmitted from a concentrator according to another embodiment of the present invention, the signal arriving at a terminal through a bundle cable. FIG.
5 is an exemplary diagram illustrating a configuration of a signal generator according to an embodiment of the present invention.
6 is an exemplary flowchart of a method of providing an aggregation device according to an embodiment of the present invention to a terminal via a bundled cable.

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.

1 to 6, a network device for providing a gigabit internet in a network according to an embodiment of the present invention and a network management method using the network device will be described in detail.

1 is a diagram illustrating a copper-based network structure according to an embodiment of the present invention.

At this time, the network management system for providing the Internet in the network only shows the schematic configuration necessary for the explanation according to the embodiment of the present invention, and is not limited to this configuration.

A network structure for providing a gigabit internet generally includes a concentrator 100, a terminal 200, and a bundle cable 300, as shown in FIG. The concentrator 100 is for providing network services from the access network to the terminal 200, and is located at the network operator side, and is connected to each of the upper communication apparatuses.

The terminal 200 is a terminal device of the concentrator 100 and is physically connected to the concentrator 100 through a bundle cable 300 and is located at the user side.

The bundle cable 300 provides a physical connection between at least one concentrator 100 and the terminal 200, and is provided in a bundled form with a plurality of copper wires. For example, some access networks may consist of more than twenty-four pairs of bundled cables.

In order to provide gigabit high-speed Internet service in a copper-based network, a wide frequency band is used. However, when the Internet is provided through the bundle cable 300, interference may occur due to overlapping frequency ranges to be used, and the performance due to interference may be degraded.

Accordingly, the network system according to an embodiment of the present invention manages the characteristics of lines connected to the subscriber terminal and transmits / receives separately encoded data so as to increase the error correction probability according to each line state.

In the copper-based network, transmission and reception characteristics such as loss, impedance, and delay time may vary depending on the type and distance of the cable connected between the concentrator 100 and the terminal 200.

Accordingly, the network system transmits a signal from the concentrator 100 to the terminal 200 for measuring the line characteristics, and grasps line characteristics using the response signal received from the terminal 200. [ According to the characteristics of the line, a frequency band having a high degree of interference can be distinguished, and data can be encoded based on the frequency band.

Therefore, the network system according to an embodiment of the present invention transmits data encoded according to channel interference characteristics, thereby minimizing interference with other Internet service even in an environment providing a network service using a wide frequency band, Can provide this excellent gigabit Internet service.

2 is a block diagram briefly showing a configuration of a concentrator according to an embodiment of the present invention.

At this time, the concentrator 100 shows only the schematic configuration necessary for the explanation according to the embodiment of the present invention, and is not limited to this configuration.

Referring to FIG. 2, the concentrator 100 includes a network matching unit 110, a transmission medium matching unit 120, and a transmission control unit 130.

The network matching unit 110 is for connecting an external network or another network with the concentrator 100. The network matching unit 110 may be modularly manufactured and detachable according to a connected network.

The transmission medium registration unit 120 is connected to the terminal 200 to transmit and receive a test signal or data and to check the connection status with the concentrator 100 for each line or each subscriber terminal.

The transmission control unit 130 may include a channel characteristic analysis unit 140, a signal generation unit 150, and the like.

The channel characteristic analyzing unit 140 analyzes the channel characteristics of the subscriber terminal 200 through the transmission medium matching unit 120

And recognizes characteristics of a line connected to the terminal 200 using the transmitted signal and the signal received from the terminal 200.

The channel characteristic analyzing unit 140 analyzes a signal strength of a transmitted signal, a signal to noise ratio (SNR), a damping coefficient corresponding to a signal intensity to be attenuated according to a line distance, The characteristics of the line connected to the terminal 200 can be analyzed using the characteristic of the signal including the arrival time, and the degree of interference of the line can be grasped.

On the other hand, the channel characteristic analyzer 140 can detect a frequency band in which the interference degree of the line is high. At this time, the channel characteristic analyzer 140 may classify the frequency band having a strong interference level according to the degree of interference of the line, divide the frequency band at a predetermined interval, and extract a section in which the interference of the line is severe in the divided frequency band interval It is possible.

FIG. 3A is an exemplary diagram showing the intensity of a signal according to a frequency band of a signal transmitted by the concentrator according to an embodiment of the present invention. FIG. 3B is a graph showing the intensity of a signal transmitted from the concentrator according to an embodiment of the present invention, And an intensity of a signal for each frequency band of a signal arriving at a terminal side via a cable.

Referring to FIG. 3, the channel characteristic analyzer 140 compares the reception intensity of the signal according to the frequency band to determine the interference level of the line. And the frequency band can be divided according to the degree of interference of the line.

For example, if the received signal intensity is intermediate, high, and low, the frequency range of ~ f1, f1 ~ f2, and f1 ~ f2, it can be divided into the sections f2 to f3.

In this embodiment, the frequency band is divided into three frequency bands. However, the present invention is not limited to this, and the frequency band may be divided into a plurality of frequency bands according to the intensity of the test response signal.

FIG. 4A is a diagram illustrating signal strengths according to frequency bands of signals transmitted from the concentrator according to another embodiment of the present invention. FIG. 4B is a diagram illustrating signal strengths of signals transmitted from the concentrator according to another embodiment of the present invention, And an intensity of a signal for each frequency band of a signal arriving at a terminal side via a cable.

4, in another embodiment of the present invention, the channel characteristic analyzer 140 divides a frequency band into a predetermined interval (~ f1, ~ f2, ~ f3, ~ f4, ... ~ fn) It is possible to extract an interval in which the degree of interference is severe in the band interval.

The signal generator 150 converts the data received through the network matching unit 110 according to the characteristics of the line analyzed by the channel characteristic analyzer 140 and generates a data signal to be transmitted to the terminal 200. The signal generator 150 may include an encoder, a multiplexer, a modulator, and the like.

At this time, the signal generator 150 may set the FEC code rate to a low value for the transmission data of the frequency band with a high degree of interference and set the FEC code rate to a high value for the transmission data of the frequency band where the degree of interference is normal.

In addition, the signal generator 150 may generate a data signal including information of a frequency band in which a payload is divided in a header, and encoding information of each frequency band.

Accordingly, the terminal 200 can decode the encoded data based on the frequency band information included in the header of the data frame and the encoding information of each frequency band.

5 is an exemplary diagram illustrating a configuration of a signal generator according to an embodiment of the present invention.

Referring to FIG. 5, the signal generator 150 may configure a MAC frame using orthogonal frequency division multiplexing access (OFDMA).

The signal generator 150 receives an MPDU (MAC Protocol Data Unit) converted by the transmission controller from the data signal received from the network matching unit 110.

The signal generator 150 may generate a transmission signal to the terminal 200 through a forward error correction (FEC) encoder.

The forward error correction encoder may encode a scrambled data signal at a coding rate set in accordance with a frequency band, and may multiplex a frame identified by a frequency band through a multiplexer to generate a signal to be transmitted to the terminal 200. At this time, the forward error correction encoder can encode the data frame with a code rate that facilitates error correction for a frequency band with a high degree of interference.

That is, the forward error correction encoder can encode the transmission data at a low FEC code rate with respect to transmission data in a frequency band with a high degree of interference, and encode it with a FEC code rate set to a high value for transmission data in a frequency band with a medium interference level.

The signal generator 150 may combine the data frames encoded through the forward error correction encoder into a single symbol through a multiplexer and generate a transmission signal to be modulated through the OFDM modulator and provided to the terminal 200 .

Hereinafter, a method for providing a network service by the concentrator according to an embodiment of the present invention will be described.

6 is an exemplary flowchart of a method of providing an aggregation device according to an embodiment of the present invention to a terminal via a bundled cable.

Referring to FIG. 6, the concentrator 100 detects the environment change (for example, a new terminal addition, a noise environment change, and the like) during data transmission / reception between the terminals 200 or periodically requires channel estimation , The concentrator 100 proceeds to a channel estimation initialization process of a line connected to the terminal 200 (S110).

The concentrator 100 transmits a test signal to the terminal 200 in order to analyze characteristics of a line connected to the terminal 200 in operation S120. When the terminal 200 receives the test signal, And transmits the signal to the concentrator 100 (S130).

The concentrator 100 analyzes the received test response signal and transmits the test response signal to the terminal 200

The channel characteristic is analyzed (S140).

In this case, the concentrator 100 measures the strength of each signal frequency band, the signal to noise ratio (SNR), the attenuation coefficient corresponding to the signal intensity attenuated according to the line distance, the time at which the test response signal arrives, The error rate information of the signal, and the error rate information of the signal. That is, the concentrator 100 can grasp the degree of interference of the line by using characteristics of the signal.

The concentrator 100 classifies the frequency bands having high interference levels according to the analyzed channel characteristics, and can transmit the transmission frames of the frequency band with the strong interference level and the transmission frames of the frequency band with the normal interference level at different coding rates (S150).

For example, the concentrator 100 may set the FEC code rate to a low value for transmission data in a frequency band with a high degree of interference and set the FEC code rate to a high value for transmission data in a frequency band where the degree of interference is normal.

At this time, the header of the transmission frame data may include the information of the frequency band in which the payload is divided and the encoding information of each frequency band.

On the other hand, the concentrator 100 can detect a frequency band in which the degree of interference of the line is high. In this case, the concentrator 100 may classify a frequency band having a strong degree of interference according to the degree of interference of the line, It is possible to extract a section where interference of the line is severe in the frequency band section.

The concentrator 100 collects data frames encoded by frequency bands into a single symbol through a multiplexer, modulates the data frame through an OFDM modulator, and transmits the modulated data frame to the terminal 200.

The concentrator 100 transmits the encoded data frame to the terminal 200 (S160), and the terminal 200 decodes the received data frame (S170).

The terminal 200 can extract the original data by decoding the payload based on the header information of the data frame.

Such a concentrator and a network providing system including a terminal can provide a gigabit internet service to the customer even in the interference provided from the adjacent line in the bundle cable by encoding the frequency band classified as the interference level at a different code rate.

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 (11)

A method for a concentrator to provide a network service to a terminal,
Transmitting a signal to the terminal,
Receiving the signal from the terminal,
Dividing the signal into a plurality of frequency bands and analyzing characteristics of a channel connected to the terminal by frequency bands divided;
The data frame of the frequency band having the interference level equal to or higher than the reference level is coded at a coding rate lower than the reference coding rate and the data frame of the frequency band having the interference level lower than the reference level is coded. And encoding at a code rate higher than the reference code rate. The method of claim 1,
The step of analyzing the channel characteristic
A signal-to-noise ratio, a damping coefficient corresponding to a signal intensity to be attenuated according to a line distance, a time at which the signal arrives, and an error ratio information of the signal, A network providing method for analyzing characteristics of a network. delete The method of claim 1,
The header of the data frame is
Wherein the payload of the data frame includes information of a frequency band in which the payload is divided, and a coding rate of the frequency band. 5. The method of claim 4,
The terminal
And decrypting the data frame using information included in a header of the data frame. A concentrator for providing a network service to a terminal through a bundle cable line,
A transmission medium registration unit for transmitting and receiving signals to and from the terminal,
The signal is divided into a plurality of frequency bands, a characteristic of a channel connected to the terminal is analyzed according to divided frequency bands, an interference degree of each frequency band is classified using the channel characteristic analysis result, Wherein the data frame of the frequency band is encoded at a code rate lower than the reference code rate and the data frame of the frequency band whose interference level is lower than the reference is encoded at a code rate higher than the reference code rate. The method of claim 6,
The transmission control unit
A channel characteristic analyzer for dividing the signal into a plurality of frequency bands and analyzing characteristics of channels connected to the terminals by frequency bands;
The data frame of the frequency band having the interference level equal to or higher than the reference level is coded at a coding rate lower than the reference coding rate and the data frame of the frequency band having the interference level lower than the reference level is coded. And a signal generator for generating a transmission signal encoded at a code rate higher than the reference code rate. 8. The method of claim 7,
The channel characteristic analyzer
A signal-to-noise ratio, a damping coefficient corresponding to a signal intensity to be attenuated according to a line distance, a time at which the signal arrives, and an error ratio information of the signal, Wherein the characteristic of the concentrator is analyzed. delete 8. The method of claim 7,
The header of the transmission signal is
Information of a frequency band in which a payload of the data frame is divided, and a coding rate of the frequency band. 11. The method of claim 10,
The terminal
And decodes the data frame using information included in a header of the data frame.
KR1020160132933A 2016-10-13 2016-10-13 Concentration apparatus and method for providing network service using the same KR101882488B1 (en)

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KR1020160132933A KR101882488B1 (en) 2016-10-13 2016-10-13 Concentration apparatus and method for providing network service using the same
PCT/KR2017/011267 WO2018070812A1 (en) 2016-10-13 2017-10-12 Line concentration device in copper wire bundle cable environment and method for providing network of optimum performance by using same

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Application Number Priority Date Filing Date Title
KR1020160132933A KR101882488B1 (en) 2016-10-13 2016-10-13 Concentration apparatus and method for providing network service using the same

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US7428669B2 (en) * 2003-12-07 2008-09-23 Adaptive Spectrum And Signal Alignment, Inc. Adaptive FEC codeword management
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KR20160035960A (en) * 2014-09-23 2016-04-01 (주)유비쿼스 METHOD FOR LINE CONTROL OF ACCESS NETWORK BASED ON G.HN TECHNOLOGY AND G.hn ACCESS MULLTIPLEXER, G.hn NTEWORK TERMINAL AND ACCESS NETWORK SYSTEM USING THE SAME

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US20140321298A1 (en) * 2011-01-12 2014-10-30 Adaptive Spectrum And Signal Alignment, Inc. Systems and methods for jointly optimizing wan and lan network communications
KR101531040B1 (en) * 2014-09-01 2015-06-24 주식회사 케이티 Device of network management for providing internet in access network and method of network management using the same

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