WO2015152570A1

WO2015152570A1 - Method for controlling line in access network having g.hn technology applied thereto, and access network line concentration instrument, access network terminal and access network system using same

Info

Publication number: WO2015152570A1
Application number: PCT/KR2015/002973
Authority: WO
Inventors: 정병길; 김영집
Original assignee: (주)유비쿼스
Priority date: 2014-04-01
Filing date: 2015-03-26
Publication date: 2015-10-08

Abstract

The present invention relates to a method for controlling a line in an access network having a G.hn technology applied thereto, and an access network line concentration instrument (GAM), an access network terminal (GNT) and an access network system using same and comprises: a plurality of domain masters, as a set of G.hn nodes, for communicating with an end point of an access network; a switch for connecting a G.hn standard physical layer to the domain masters; and a control unit for controlling at least one of a bandwidth, output and a signal-to-noise ratio offset of a signal that is being transmitted by the domain masters and/or the end point.

Description

라인 ．Line control method of access network with applied technology, access network concentrator, access network terminal, and access network system using the same

The present invention relates to a line control method of an access network to which the G.hn technology is applied, a GAM of an access network, a terminal of an access network (GNT), and an access network system. Line control method of access network with G.hn technology that controls line speed and output according to target bandwidth and real-time changing line condition and reduces crosstalk between each bundle cable and access network concentrator using the same , Access network terminals, and access network systems.

G.hn is a Recommendation on ITU-G.9960 as a standard for the configuration and physical layer of wired-based home network transceivers. Referring to FIG. 1, in home networks according to the G.hn series of recommendations developed by the ITU-T, communication between domains is performed through a domain master. The domain master allocates and coordinates the resources (eg bandwidth, priority, etc.) of all nodes in the domain. The domain master can store and manage MAC addresses in the node registration process, have an authentication control function for joining nodes, and the domain master can monitor the status of nodes in the domain. In addition, a node belonging to a domain supports a subscription authentication control protocol, and may receive and perform other operations according to a medium access plan (MAP).

On the other hand, G.hn uses Power Line, Coaxial Cable, Unshielded Twisted Pair (UTP) Line, Phone Line, etc. as a single pair, but in access network, more than 1Pair Bundle It consists of Thus, G.hn (ITU-T 9960, 9961) technology, which is used for home networks, can be applied to access networks using existing coaxial cable, UTP, or telephone lines, providing maximum bandwidth of 1Gbps.

Therefore, when G.hn technology is applied to the access network, the central office (CO) and the terminal (Customer Premises Equipment, CPE) are connected by bundled cables, and in this case, communication is difficult due to crosstalk occurring on the bundled cables. This can happen. In addition, G.hn is a half duplex and best effort technology that cannot control the bandwidth of each port. There is a need for a technology that can set a separate bandwidth.

The present invention is a line control method of an access network to which G.hn technology is applied to control line speed and output and reduce crosstalk between bundle cables according to target bandwidth that can be changed for each subscriber and line conditions that change in real time. And to provide a Concentration Equipment (GAM) of the access network, the terminal of the access network (GNT) and an access network system using the same.

According to a feature of the present invention for achieving the above object, the concentrator of an access network to which the G.hn standard of the present invention is applied is a domain master that communicates with an endpoint of an access network as a collection of G.hn nodes. A control unit for controlling at least one of a bandwidth, an output, and a signal-to-noise ratio offset of a signal transmitted by at least one of the domain master and the endpoint; Include.

In this case, the control unit calculates the actual amount of traffic for each port so as to lower the output power of the corresponding port for no traffic or significantly lower than other ports, and for the port with a lot of actual traffic or significantly higher than other ports. By increasing the output power of, it efficiently manages the traffic usage within the same bundle.

According to another feature of the present invention, a terminal of an access network to which the G.hn standard of the present invention is applied communicates with a domain master, which is a set of G.hn nodes included in the concentrating equipment, and transmits the information to the control unit of the concentrating equipment. At least one of the bandwidth, the actual traffic volume, the output and the signal-to-noise ratio offset of the signal is controlled.

According to still another aspect of the present invention, an access network system to which the G.hn standard of the present invention is applied includes a plurality of domain masters communicating with terminals of an access network, bandwidths of signals transmitted by the domain masters, actual traffic amounts, A control unit for controlling at least one of an output and a signal-to-noise ratio offset, and a concentrating device connecting the domain master and the G.hn standard physical layer, and a speed of a signal communicating with the domain master and transmitted by the control unit. And a terminal of the access network in which at least one of the outputs is controlled.

According to still another aspect of the present invention, in the line control method of an access network to which the G.hn technology of the present invention is applied, the control unit of the concentrating equipment receives a target bandwidth of a terminal set by at least one subscriber, Detecting a line parameter of the terminal by each domain master, and controlling the bandwidth of a signal transmitted by at least one of the domain master and the terminal based on the line parameter by the controller.

According to another aspect of the invention, the line control method of the access network to which the G.hn technology of the present invention is applied, the terminal detecting the actual received signal gain and target forward error correction rate of one or more subscribers, and And controlling, by the controller, at least one of an output of a signal transmitted by at least one of the domain master of the concentrating equipment and the terminal and a signal-to-noise ratio offset based on the actual received signal gain and target forward error correction rate of the subscriber.

According to still another aspect of the present invention, in the line control method of the access network to which the G.hn technology of the present invention is applied, setting a transmission output to a reference output value “x” for all subscribers on the bundle cable, the traffic per subscriber Detecting a usage amount, determining whether the traffic usage of the subscriber increases due to a sudden increase in the traffic usage, and when the traffic usage of the subscriber increases, the transmission output is adjusted downward and link adaptation is performed for another subscriber. And when the traffic usage of the subscriber increases, adjusting the transmission output upward and performing link adaptation for another subscriber.

In this case, the line control method of the access network to which the G.hn technology is applied according to another aspect of the present invention, the step of measuring the amount of up and down traffic of each subscriber at a predetermined time period and the control unit of the concentrator according to the actual traffic amount of the subscriber And controlling at least one of an output of a signal transmitted by at least one of the domain master and the terminal of the concentrator and a signal-to-noise ratio offset.

According to another feature of the invention, the line control method of the access network to which the G.hn standard of the present invention is applied to apply the G.hn technology in an access network between at least one concentrator having a plurality of ports and a plurality of subscriber stations A method for setting a target bandwidth of the terminal, the node of the concentrating equipment monitoring a line parameter physically connected to the terminal in real time, the bandwidth calculated based on the line parameter and the Comparing the target bandwidth set by the terminal, and adjusting the actual line speed of the terminal to the target bandwidth, the actual performance of the terminal in the step of adjusting the line speed of the terminal is higher than the target bandwidth If a specific frequency notch filter processing is performed, the actual performance of the terminal is If less than the width and to run off the specific frequency notch filter.

According to the present invention, G.hn technology can be applied to an access network using existing coaxial cable, UTP or telephone line to provide efficient data transmission to service subscribers with high bandwidth, and by setting bandwidth for each port, Can control the service level agreement (SLA), and can reduce crosstalk during data transmission.

1 is a configuration diagram schematically showing a configuration of a general G.hn standard.

2 is a block diagram of an access network to which the G.hn standard is applied according to an embodiment of the present invention.

3 is a graph illustrating a signal to noise ratio (SNR) in a frequency range of 0 to 100 MHz according to an embodiment of the present invention.

4 is a graph illustrating SNR of a G.hn line due to interference in a 100m long line connected by CPEV according to an embodiment of the present invention.

5 is a graph that differentiates services according to actual traffic usage per subscriber according to an embodiment of the present invention.

6 to 8 are flowcharts illustrating an operation of a line control method of an access network to which the G.hn standard is applied according to an embodiment of the present invention.

9 is a flowchart illustrating a method for controlling subscriber line speed adjustment using a notch filter according to another exemplary embodiment of the present invention.

FIG. 10 is a diagram illustrating a line state in uplink traffic before and after applying a line control method according to an embodiment of the present invention.

11 is a diagram illustrating a line state in downlink traffic before and after applying a line control method according to an embodiment of the present invention.

Hereinafter, a line control method of an access network to which the G.hn technology according to the present invention is applied, a GAM, an access network terminal (GNT), and an access network system of the access network using the same will be described in detail with reference to the accompanying drawings. Explain. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

The line control method and system of the access network of the present invention has a plurality of ports (GAM) that performs a domain master (DM) function, the end forming the domain master (DM) and G.hn domain It can be implemented in a G.hn standard access network environment in which multiple terminals (GNT) having a point (EP) function are connected by a bundle cable.

2 is a block diagram of an access network to which the G.hn standard is applied according to an embodiment of the present invention. The access network is applicable to both an optical based access network and a telephone line DSL based access network depending on the connection medium. 2 illustrates a DSL access network based on a telephone line according to an embodiment.

As shown in FIG. 2, an access network to which the G.hn standard is applied according to an embodiment of the present invention includes a G.hn access multiplexer (or aggregation) in which a plurality of ports function as a domain master. Equipment) (100), G.hn network terminal (G.hn network terminal (or terminal) 200) to be replaced by the endpoint of the G.hn standard, and to connect the domain master and the endpoint with a bundle cable (140) Includes Phone Line.

The aggregation equipment (GAM) 100 is a collection of G.hn nodes, the domain master 120 communicating with the terminal (GNT) 200 of the access network, and the plurality of domain masters 120 for the physical layer of the G.hn standard. And a control unit 130 that controls at least one of a speed and an output of a signal transmitted from the switch 110 and the domain master.

The terminal (GNT) 200 is connected to the domain master 120, which is a set of G.hn nodes included in the GAM 100, by a bundle cable, and is synchronized and communicates at a frequency of 10 kHz or less. It is replaced by the endpoint of the hn standard and at least one of the speed and output of the signal transmitted by the control unit 130 of the GAM (100) can be controlled.

In this case, the GAM 100 is located at the network operator side, and the terminal GNT 200 is physically connected to the GAM 100 as a terminal device of the GAM 100. Can be located at the user, i.e., the service subscriber side. For example, the collecting equipment (GAM) 100 may be connected to the terminal (GNT) 200 by a telephone line. Concentration equipment (GAM) 100 is connected to the uplink (Uplink) 10, it may be configured to include a switch (110) and a plurality of ports (Port). The uplink 10 may be connected to an upper communication device, and a plurality of ports may be connected to one terminal (GNT) 200 through a telephone line and CPEV, F / S, TIV, and UTP.

At this time, in order to apply the G.hn technology to the access network consisting of the GAM (100) and the terminal (GNT) 200, the ports provided in each GAM (100) G.hn standard It is replaced by the domain master 120 to perform the role of the domain master 120 of, so that each terminal (GNT) 200 can serve as an endpoint (End Point, EP) of the G.hn standard Can be replaced by an endpoint. That is, the G.hn domain may be formed on the network by the terminal (GNT) 200 replaced by a plurality of endpoints connected with the domain master 120.

Here, the bit rate range of a typical subscriber DSL service is typically 250 kbit / s to 100 Mbit / s, and specifically, the DSL bit rate is determined as shown in Table 1 below.

Table 1

3 is a graph illustrating a signal to noise ratio (SNR) in a frequency range of 0 to 100 MHz according to an embodiment of the present invention. Referring to FIG. 3, the signal-to-noise ratio is decreasing as the frequency increases, and the communication channel is stable in the low frequency section and unstable in the high frequency section. The symbol maximum bit-loading value of a carrier is 12 bits, and maintains a high bit load value in a low frequency section while maintaining a low bit load value in a high frequency section. Thus, it can be seen that the communication channel is relatively stable at low frequencies.

In this case, the controller 130 notch filters the signal transmitted by the domain master 120 in a specific frequency band when the actual speed of the signal transmitted by the domain master 120 is higher than the target bandwidth set by the subscriber. Bandwidth can be attenuated, and in this case, the controller 130 can actually reduce the bandwidth of the signal transmitted by the domain master 120 based on a line parameter including at least one of line speed, frequency characteristics, interference, and packet error. You can calculate the speed. That is, when the controller 130 sets a target bandwidth for each subscriber, the terminal 130 may set the terminal of the subscriber to the bandwidth according to the service level agreement provided by the service provider.

In addition, the domain master 120 may detect actual values such as line speed, actual traffic volume, frequency characteristics, interference, and packet error, which are line parameters of the subscriber line. In this case, the line parameter may be sensed by the domain master 120, or may be sensed by the terminal (GNT) 200 and transmitted to the domain master 120. In addition, when the actual performance of the subscriber is higher than the target bandwidth, or the actual traffic volume or significantly lower than other subscribers, the controller 130 applies a notch filter to a frequency band having a high SNR value, that is, a relatively stable frequency band, or applies a transmission output. By lowering the line's actual performance, the line's transmission rate can be matched to the target bandwidth.If the subscriber's actual performance is lower than the target bandwidth, the notch filter is applied when the subscriber's actual performance is lower, or the traffic is significantly higher than the narrow subscriber. By releasing and releasing or increasing the transmit power, the line's actual performance can be increased to match the line's transmission rate to the target bandwidth.

4 is a graph illustrating SNR of a G.hn line due to interference in a 100m long line connected to CPEV according to an embodiment of the present invention. As shown in FIG. 4, the SNR is 50db, minimum 0db, and average 25db in the absence of interference, while the maximum is 45db, minimum -10db, and average 17.5db in the presence of interference. It can be seen that this becomes worse and distortion occurs in the entire frequency band.

As described above, the concentrator GAM 100 and the terminal GNT 200 are each of the plurality of domain masters 120 and the terminal GNT (replacement of each port of the concentrator GAM 100). Since it is connected by a bundle cable connecting the 200, it may cause a communication failure due to crosstalk between each bundle. In particular, when the access network is connected through a telephone line as in the example of FIG. 1 described above, communication between the GAM 100 and the terminal GNT 200 is sensitive to interference of FoamSkin, CPEV, TIV, PVC, and the like. In the high frequency band of 2 ~ 100MHz used by G.hn, interference between each line may be more severe. In particular, when the power of the terminal (GNT) 200 is turned on (Power Up), when the link is established (Link Up) and when the data is actually transmitted and received, the signal of the other terminal (GNT) 200 is attenuated by interference. Since distortion may occur, the settings between the lines need to be changed in real time according to the occurrence of the interference.

Accordingly, the controller 130 determines that the actual Rx gain of the subscriber for the downlink traffic is greater than the target subscriber signal gain of the preset subscriber or the target forward error correction rate (FECR) of the preset subscriber. ) Is greater than the subscriber's actual forward error correction rate, or the subscriber's downlink traffic is significantly higher than other subscribers, or when the domain master 120 transmits a signal (Tx Power) and signal-to-noise ratio offset (SNR Offset). If the actual received signal gain for the downlink traffic is less than or equal to the target receiver signal gain of the predetermined subscriber, and the target forward error correction rate of the preset subscriber is less than or equal to the actual forward error correction rate of the subscriber Domain master 120 if there is no downlink traffic from the subscriber or significantly lower than other subscribers Can reduce the output and signal-to-noise ratio offset of the transmitted signal.

In addition, the controller 130 may determine that the actual received signal gain of the subscriber for the upstream traffic is greater than the target received signal gain of the preset subscriber, or the target forward error correction rate of the preset subscriber is greater than the actual forward error correction rate of the subscriber, or If the subscriber has a lot of upstream traffic or is significantly higher than other subscribers, the signal output (Tx Power) and signal-to-noise ratio offset (SNR Offset) of the signal transmitted by the terminal (GNT) 200 may be increased, and the actual upstream traffic may be increased. If the received signal gain is less than or equal to the preset target received signal gain of the subscriber and the target forward error correction rate of the preset subscriber is less than or equal to the actual forward error correction rate of the subscriber, or there is no upstream traffic of the subscriber or Significantly lower than the output and signal-to-noise ratio offset of the signal transmitted by the terminal (GNT) 200 Can be reduced.

In other words, the received signal gain, FECR, and actual transmission speed change according to the cable, line length, and transmit power, and the received signal gain, FECR, SNR, The actual traffic volume can be analyzed to change the transmit power and SNR offset settings. At this time, each terminal (GNT) 200 can periodically detect the actual transmission rate, the actual traffic amount, the received signal gain, FECR, SNR of the downlink traffic, each domain master 120 is the actual transmission rate of the uplink traffic, Actual traffic volume, received signal gain, FECR, and SNR can be periodically detected, and the detected information is transmitted to the domain master 120 to be used by the controller 130 to control the parameters of each line as described above. Can be.

5 is a graph that differentiates services according to actual traffic usage by subscribers according to the present invention. Referring to FIG. 5, there is a significant difference in performance depending on the number of active ports in adjacent ports or bundle cables due to the characteristics of G.hn. For example, as the number of active ports on a bundle cable increases, performance degrades, so if the standard reference value is “x”, the actual output value may be much lower. In addition, all the links are simultaneously connected on the bundle cable, so that the total traffic does not always maintain the peak, and the subscriber is randomly connected to the link and the entire traffic is not filled. Therefore, since traffic usage varies according to active ports in real time, it is necessary to flexibly adjust traffic resources to provide services differently according to subscriber circumstances.

For example, if the downlink transmit power (Tx-Power) of all active ports on the bundle cable is uniformly set to the reference output value “x”, there is no significant change in traffic usage per subscriber (subscribers A, B). Are most common, but traffic usage may increase significantly (subscriber C). Therefore, it is not necessary to uniformly fix the transmit power (Tx-Power) to the reference output value (x) without considering the usage situation for each subscriber. In consideration of the traffic usage of the subscriber, the transmission output (Tx-Power) can be provided differently to the subscriber by changing the transmission power (Tx-Power) above or below "x".

For example, the downlink transmission power (Tx-Power) may be adjusted by periodically checking the change in the downlink traffic of each subscriber port. For every port, every 10 seconds (for example, 5 seconds) can be monitored by statistic of the traffic down rate (Down Rate) per port. By comparing the traffic usage of the last 5 seconds (t0 ~ t1) (Last Down Rate) and the traffic usage of the current 5 seconds (t1 ~ t2) (Present Down Rate) I can know the fact.

Therefore, the current 5 second interval traffic usage statistics (Present Down Rate) is 7 Mbps or more (when IP-TV service is started) or the current 5 second interval statistics (Present Down Rate) is higher than the last 5 seconds interval statistics (Last Down Rate). If it increases by more than 50% (when traffic usage such as speed measurement increases rapidly), it is necessary to adjust the transmit power (Tx-Power) of the corresponding port.

In this way, as the transmission output (Tx-Power) of the corresponding port is adjusted upward to "x + α" larger than the reference output value, link-adaptation is performed for other active subscriber ports. That is, by real-time monitoring and statistics of the traffic usage information of each subscriber by port (in this case, each state change can be output as a log for the test of the corresponding function), it is possible to grasp the traffic usage of each subscriber, It is possible to reassign the transmit power (Tx-Power) of the subscriber with a high demand and increase it as needed. On the contrary, it is necessary to perform the link adaptation by adjusting the output downward for the subscriber with the low traffic demand. As a result, the transmission power (Tx-Power) may be optimized to correspond to the subscriber's usage, thereby maximizing limited traffic resources.

In addition, when the transmit power (Tx-Power) is “x + α”, the current interval of more than 5 seconds (t3 to t4: the transmit power decreases temporarily and then rises again. Decrease rate stats will be longer.) If the statistic (Present Down Rate) stays below 7 Mbps for more than a few minutes (eg 5 minutes) (remain current for at least 5 minutes to reboot the STB button, restart the PC, or retest the speed measurement). The transmission environment (Tx-Power) of the corresponding port is reset to the reference output value “x”, and similarly, the link-adaptation is performed on the transmission power (Tx-Power) of all other subscribers. Optimizes transmit power.

Therefore, when the transmission output of one or more subscriber ports is down, all other active subscriber ports can perform link-adaptation to reallocate the transmission output and improve the traffic usage efficiency.

6 is a flowchart illustrating an operation of a line control method of an access network to which the G.hn standard is applied according to an embodiment of the present invention. A line control method of an access network to which the G.hn standard is applied according to an embodiment of the present invention will be described with reference to this.

First, the control unit 130 of the GAM 110 receives a target bandwidth of a terminal (GNT) 200 set by at least one subscriber (S110).

Subsequently, each domain master 120 of the GAM 110 detects a line parameter of the terminal GNT 200 (S120). In this case, the line parameter may include at least one of a line speed, an actual traffic amount, a frequency characteristic, interference, and a packet error. As described above, the line parameter may be sensed by the domain master 120, or may be sensed by the terminal (GNT) 200 and transmitted to the domain master 120. In addition, the controller may calculate the actual transmission speed of the signal transmitted by the domain master 120 based on the line parameter.

Subsequently, the controller 130 compares the actual transmission speed and the actual traffic amount of the signal transmitted by the domain master 120 with the target bandwidth of the terminal (GNT) 200 set by the subscriber (S130). At this time, if the actual transmission rate of the signal transmitted by the domain master 120 is greater than the target bandwidth, the actual traffic volume of the subscriber or significantly lower than other subscribers, the control unit 130 is a signal transmitted by the domain master 120 Applying a notch filter to or reduce the bandwidth by reducing the transmission power (S140). In addition, if the actual transmission speed is not greater than the target bandwidth or the actual traffic volume of the corresponding subscriber is significantly higher than other subscribers, the notch filter is released to the signal transmitted by the domain master 120 to increase the bandwidth (S150).

In step S130 to step S150, the controller 130 may control the bandwidth of the signal transmitted by the domain master 120 based on the line parameter.

7 is a flowchart illustrating an operation of a line control method of an access network to which the G.hn standard is applied according to an embodiment of the present invention.

First, the terminal (GNT) 200 detects the subscriber's actual received signal gain and target forward error correction rate (S210).

Thereafter, the controller 130 compares the actual received signal gain with the target received signal gain and the actual forward error correction rate with the target forward error correction rate (S220). In this case, when the actual received signal gain of the subscriber is greater than the target received signal gain of the preset subscriber, or the target forward error correction rate of the preset subscriber is larger than the actual forward error correction rate of the subscriber, the controller 130 controls the domain master 120. Increases the output and signal-to-noise ratio offset of the transmitted signal (S230) and ends the process. In addition, if the subscriber's actual received signal gain is less than or equal to the preset subscriber's target received signal gain, and the preset subscriber's target forward error correction rate is less than or equal to the subscriber's actual forward error correction rate, the controller 130 controls the domain master. The output of the signal transmitted by the 120 and the signal-to-noise ratio offset are reduced (S240) and the process ends.

In step S220 to step S240, the control unit 130 controls the domain master 120 and the terminal GNT of the GAM 100 based on the actual reception signal gain and the target forward error correction rate of the subscriber. At least one of the 200 may control at least one of an output of a signal transmitted and a signal-to-noise ratio offset.

8 is a flowchart illustrating an operation of a line control method of an access network to which the G.hn standard is applied according to another embodiment of the present invention.

First, the transmission output (Tx-Power) of all subscribers is set to the reference output value "x" (S310). Where “x” is the average value of the transmit power at the active port on the bundle cable. This is a value reduced from the original output due to crosstalk of the bundle cable. At this time, the reference output value may be set as default, and may be adjusted upward depending on circumstances, or conversely, the reference output value may be adjusted to a maximum value and may be adjusted downward depending on the traffic usage state.

Terminal (GNT) 200 detects the actual traffic usage of the subscriber (S320). In the case of office subscribers, the traffic share will be concentrated in the night time after leaving the office. In the case of housewives, there may be more traffic during the day.

The controller 130 compares whether the actual traffic usage of the subscriber is significantly increased (S330).

At this time, if it is determined that the traffic usage of the subscriber is significantly increased, the transmission output of the subscriber can be adjusted upward. In this case, as the transmission power of the corresponding subscriber is adjusted upward, link adaptation may be performed on the transmission output of the other subscriber and then adjusted downward (S340). If the current five-second statistics are 7Mbps or more, which is estimated to start IP-TV service, or if the traffic usage has increased by more than 1/2 of the previous five-second interval statistics, the above-mentioned traffic usage is considerably increasing. .

On the contrary, when the traffic usage of the subscriber does not increase, the transmission output of the subscriber may be adjusted downward. Similarly, as the transmission output of the corresponding subscriber is adjusted downward, link adaptation may be performed on the transmission output of another subscriber to reallocate traffic resources (S350). If the PC is powered on but the subscriber only has the port open and no traffic is used, the PC is powered off.

It is unusual to keep the transmit power up, so monitor traffic usage at regular intervals. For the corresponding port where the transmit power is increased, the transmit power is no longer adjusted when the seconds statistics remain below 7 Mbps for a few minutes (5 minutes) or when the subscriber's current segment traffic usage decreases by more than 50% compared to the previous segment statistics. It is not necessary to maintain the transmission output state, and accordingly, it is necessary to reset the transmission output to "x" which is the reference output value as in the initial access (initial access) (S360).

9 is a flowchart illustrating a method of controlling a line speed adjustment of a subscriber using a notch filter according to the present invention.

Referring to FIG. 9, in the step of setting a target bandwidth (TB) for each subscriber, a subscriber terminal may be set to a bandwidth contracted by a service level agreement (SLA) provided by a service provider (S401).

In the subscriber line parameter monitoring step, the subscriber line performance in use can be analyzed by monitoring the actual parameter line speed, frequency characteristics, interference, and packet error of the subscriber line (S402).

In the comparing of the actual subscriber line rate (AR) and the target bandwidth, it is possible to compare the subscriber actual performance and the subscriber target bandwidth analyzed in the line parameter monitoring step for each subscriber (S403).

If the actual performance of the subscriber is higher than the target bandwidth, a specific frequency notch filter processing step may be performed (S404).

If the actual performance of the subscriber is lower than the target bandwidth, the specific frequency notch filter processing release step may be performed (S405).

Notch-filtering the frequency band with high SNR value, that is, the relatively stable frequency range, can reduce the line actual performance to match the target bandwidth.

By using the line rate control method of the present invention, a relatively stable frequency is released through a notch filter process, thereby releasing higher quality resources, that is, less noise resources, thereby providing more network resources to other subscribers, and also releasing less noise resources. Therefore, interference does not occur when other subscribers use the corresponding resource.

As shown in FIG. 10, when the transmission output of the terminal (GNT) 200 is constant, a case where a transmission state of uplink traffic may be poor may occur according to a state of a line, and thus, when the transmission state is poor, the terminal (GNT) It can be seen that by increasing the transmit power and SNR offset of 200, good transmission results can be obtained.

As shown in FIG. 11, when the transmission output of the GAM 100 is constant, a case where the transmission state of the downlink traffic may be poor according to the state of the line may occur. It can be seen that good transmission results can be obtained by increasing the transmission power and SNR offset of the GAM) 100.

As described above, according to the present invention, G.hn technology can be applied to an access network using a conventional coaxial cable or a telephone line to provide efficient data transmission to a service subscriber with high bandwidth, and by setting a bandwidth for each port. The transmission speed can be controlled to provide service level agreements and to reduce crosstalk during data transmission.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. Will understand. Therefore, the technical protection scope of the present invention will be defined by the claims below.

Claims

A domain master in communication with an endpoint of an access network as a collection of G.hn nodes;

A switch connecting a physical layer of a G.hn standard to a plurality of domain masters; And

And a control unit for controlling at least one of a bandwidth, an output, and a signal-to-noise ratio offset of a signal transmitted by at least one of the domain master and the endpoint.
The method of claim 1,

If the actual speed of the signal transmitted by the domain master is higher than the target bandwidth set by the subscriber, the controller applies a notch filter to the signal transmitted by the domain master to attenuate the bandwidth. Concentration equipment in the access network.
The method according to claim 1 or 2,

The controller calculates an actual speed of a signal transmitted by the domain master based on a line parameter including at least one of bandwidth, actual traffic volume, frequency characteristics, interference, and packet error. Concentration equipment in the applicable access network.
The method of claim 1,

The controller may be configured when the actual received signal gain of the subscriber is greater than the target received signal gain of the preset subscriber, or the target forward error correction rate of the preset subscriber is larger than the actual forward error correction rate of the subscriber, or the actual traffic of the subscriber is different. Compared with the G.hn standard, characterized in that in the case of significantly more than at least one of the domain master and the endpoint increases at least one of the output of the signal transmitted and the signal-to-noise ratio offset.
G.hn standard, in which at least one of the bandwidth, the actual traffic volume, the output, and the signal-to-noise ratio offset of the signal transmitted by the controller of the concentrator is controlled by communicating with a domain master, which is a set of G.hn nodes included in the concentrator, The terminal of the access network to which this applies.
The method of claim 5,

The controller applies a notch filter to the signal transmitted by the domain master when the actual speed of the signal transmitted by the domain master is higher than the target bandwidth set by the subscriber or when there is no actual traffic of the subscriber or is significantly lower than other subscribers. A terminal of an access network to which the G.hn standard is applied, characterized by attenuating the.
The method according to claim 5 or 6,

The controller calculates an actual speed of a signal transmitted by at least one of the domain master and the terminal based on a line parameter including at least one of a bandwidth, an actual traffic amount, a frequency characteristic, interference, and a packet error. A terminal of an access network to which the G.hn standard is applied.
The method of claim 5,

The controller may be configured when the actual received signal gain of the subscriber is greater than the target received signal gain of the preset subscriber, or the target forward error correction rate of the preset subscriber is larger than the actual forward error correction rate of the subscriber, or the actual traffic of the subscriber is different. In comparison, the terminal of the access network to which the G.hn standard is applied is characterized in that if the remarkably large number is increased, at least one of an output of a signal transmitted by at least one of the domain master and the terminal and a signal-to-noise ratio offset.
A plurality of domain masters communicating with terminals of an access network, and a controller for controlling at least one of a bandwidth, an actual traffic amount, an output, and a signal-to-noise ratio offset of a signal transmitted by the domain master, wherein the domain master and the G.hn standard Concentrating equipment for connecting the physical layers; And

A G.hn standard is applied to the G.hn standard including a terminal of the access network to communicate with the domain master, the at least one of the speed and output of the signal transmitted by the control unit is controlled.
The method of claim 9,

The controller applies a notch filter to a signal transmitted by the domain master when the actual speed of the signal transmitted by the domain master is higher than the target bandwidth set by the subscriber or when there is no actual traffic of the subscriber or is significantly lower than other subscribers. Access network system to which the G.hn standard is applied, characterized in that the bandwidth is reduced.
The method according to claim 9 or 10,

The control unit calculates the actual speed of a signal transmitted by the domain master based on a line parameter including at least one of bandwidth, actual traffic, frequency characteristics, interference, and packet error. Access network system.
The method of claim 9,

The controller may be configured when the actual reception signal gain of the subscriber is greater than the target reception signal gain of the preset subscriber, the target forward error correction rate of the preset subscriber is larger than the actual forward error correction rate of the subscriber, or the actual traffic of the subscriber is different from other subscribers. Compared with the G.hn standard, characterized in that the remarkably large number of cases increase the output of the signal transmitted by at least one of the domain master and the terminal and the signal-to-noise ratio offset.
Receiving, by the controller of the concentrating equipment, a target bandwidth of a terminal set by at least one subscriber;

Detecting, by each domain master of the concentrating equipment, line parameters of the terminal; And

And controlling, by the controller, bandwidth of a signal transmitted by at least one of the domain master and the terminal based on the line parameter.
The method of claim 13,

The controller applies a notch filter to a signal transmitted by the domain master when the actual speed of the signal transmitted by the domain master is higher than the target bandwidth set by the subscriber or when there is no actual traffic of the subscriber or is significantly lower than other subscribers. The method of controlling a line in an access network to which the G.hn standard is applied, characterized in that the bandwidth is reduced.
Detecting, by the terminal, the actual received signal gain and target forward error correction rate of one or more subscribers; And

Controlling, by the controller of the concentrating equipment, at least one of an output of a signal transmitted by at least one of the domain master and the terminal of the concentrating equipment and a signal-to-noise ratio offset based on the actual reception signal gain and a target forward error correction rate of the subscriber; Line control method of an access network to which G.hn technology is included.
The method of claim 15,

The control unit may determine that the actual reception signal gain of the subscriber is greater than the target reception signal gain of a preset subscriber, or the target forward error correction rate of the subscriber is greater than the actual forward error correction rate of the subscriber, or the actual traffic of the subscriber is increased. In the case of significantly more than other subscribers, the line control method of the access network to which the G.hn standard is applied, wherein at least one of the output of a signal transmitted by at least one of the domain master and the terminal and a signal-to-noise ratio offset are increased.
Setting the transmit power to a reference output value of “x” for all subscribers on the bundled cable;

Detecting traffic usage per subscriber;

Determining whether the traffic usage increases rapidly and the traffic usage of the subscriber increases;

If the traffic usage of the subscriber increases, down-regulating the transmission output and performing link adaptation for another subscriber; And

Adjusting the transmission power and performing link adaptation for another subscriber when the traffic usage of the subscriber increases.
The method of claim 17,

The step of determining whether the traffic usage of the subscriber is increased, the line control method of the access network to which the G.hn standard is applied, characterized in that it is determined that the current traffic statistics 5 seconds or more than 7Mbps.
The method of claim 17,

The step of determining whether the traffic usage of the subscriber increases is applied to the G.hn standard, characterized in that it is determined that the current traffic usage statistics of the first section is increased by at least 1/2 of the traffic usage statistics of the first section. Line control method of an access network.
The method of claim 19,

And determining whether or not the traffic usage is suddenly reduced so that the upwardly adjusted transmission output is maintained.
The method of claim 20,

The determining of whether the up-regulated transmission output is maintained may include determining that the traffic usage decreases sharply when the traffic usage statistics of the second section of the up-regulated transmission output is maintained for more than several minutes. Line control method of an access network to which the G.hn standard is applied.
The method of claim 20,

The step of determining whether the up-regulated transmission output is maintained is maintained when the traffic usage statistics of the second section of the up-regulated transmission output decrease by 50% or more compared to the previous traffic statistics. And a line control method for an access network to which the G.hn standard is applied.
The method of claim 22,

The first section is 5 seconds, the second section is longer than 5 seconds line control method of the access network to which the G.hn standard is applied.
A method for applying G.hn technology in an access network between one or more concentrators having multiple ports and multiple subscriber stations,

Setting a target bandwidth of the terminal;

Monitoring, by a node of the concentrating equipment, a line parameter physically connected to the terminal in real time;

Comparing the bandwidth calculated based on the line parameter with a target bandwidth set by the terminal; And

And adjusting the actual line speed of the terminal according to a target bandwidth, and if the actual performance of the terminal is higher than a target bandwidth in the step of adjusting the line speed of the terminal, performing a specific frequency notch filter process, and A method of controlling a line of an access network to which the G.hn standard is applied, wherein a specific frequency notch filter processing is canceled when the actual performance of the antenna is lower than the target bandwidth.
The method of claim 24,

Wherein the line parameter includes at least one of a line speed, a frequency characteristic, interference, and a packet error.
The method of claim 24,

The access network is a line control method of an access network to which the G.hn standard is applied, characterized in that the telephone line based DSL access network.
The method of claim 24,

The port is replaced with a domain master, and the terminal is replaced with an endpoint is applied to the G.hn standard, the line control method of the access network is applied.
An access network concentrator in which a domain master performs a master function on each port;

Access network terminals for which the endpoint performs client functions; And

It includes a bundle cable to which the concentrating equipment and the terminals are connected,

When the actual traffic usage of the terminal is increased or decreased, the concentrator equipment adjusts the transmission output on the bundle cable up or down, the access network system to which the G.hn standard is applied.