WO2016010192A1

WO2016010192A1 - Network management device for providing internet in access network and network management method using same

Info

Publication number: WO2016010192A1
Application number: PCT/KR2014/009150
Authority: WO
Inventors: 박노욱; 박형진; 정인택; 김종학; 윤광열; 하태우
Original assignee: 주식회사 케이티
Priority date: 2014-07-17
Filing date: 2014-09-30
Publication date: 2016-01-21
Also published as: MY181588A; PH12017500099A1

Abstract

The present invention relates to a network management method for providing the internet in an access network structure in which a network management device is connected to one or more subscriber terminals through a bundle cable. A network management method, according to the present invention, comprises the steps of: setting a channel to one or more subscriber terminals and transmitting a test signal so as to confirm the channel state of the channel; receiving a response signal to the transmission; analyzing the received response signal and determining, in accordance with a response signal of an adjacent line or an adjacent channel, parameters for optimizing the channel state; and transmitting and receiving data to and from the subscriber terminals by using the determined parameters.

Description

Network management device for providing internet in access network and network management method using same

The present invention relates to a network management apparatus for providing the Internet in an access network and a network management method using the same.

As a method of providing Internet service using a copper wire in the premises, there is a digital subscriber line (DSL) technology using a telephone line and an Ethernet method using an unshielded twisted pair cable (UTP).

However, the existing method using DSL technology provides Internet service using a bundle cable in the premises. Therefore, the existing DSL technology requires a complicated technology due to interference in the bundle cable and could not provide a service over 100Mbps.

Conventional DSL technology has a one-to-one connection between a port of a communication device and a subscriber, thus limiting the number of subscribers to be expanded according to the capacity of the network equipment. In addition, the Ethernet method using the UTP cable is expensive because the telephone line cable must be replaced with UTP.

In addition, 2pair bonding technology for providing Internet speed of 100Mbps or more using the existing DSL technology is expensive due to the additional cable, there is a difficulty in the interference between the lines.

The present invention proposes a network management apparatus for providing the Internet in a network structure connected by a bundle cable and a network management method using the same.

The network management method of the present invention is a method for managing a network to provide the Internet in an access network structure in which a network management device and at least one subscriber station are connected through a bundle cable, transmitting a test signal with the at least one subscriber station. Receiving a response signal for the transmission, analyzing the received response signal, determining parameters for optimizing the channel state in consideration of a response signal of an adjacent channel or an adjacent line, and the determined parameter And transmitting and receiving data to and from the subscriber station.

Transmitting and receiving data with the subscriber station may include controlling to transmit data simultaneously in synchronization when transmitting data if at least two subscriber stations are connected to the same line.

The transmitting and receiving of data with the subscriber station may further include controlling to transmit the data in a time division manner by allocating a time slot when transmitting data, when only one subscriber station is connected to the same line.

The transmitting of the test signal may include establishing a channel with the at least one subscriber station, and setting the channel may include resetting the channel when a network environment is changed. have.

The setting of the channel may include setting different channels for each of the at least one subscriber station.

The determining of the parameters may include repeatedly transmitting and receiving different parameter values with the subscriber station to determine an optimal parameter value.

Receiving the response signal for the transmission may include receiving a signal including the reception state information of the test signal.

The reception state information of the test signal may include at least one of information on signal transmission, such as arrival time, reception strength, or error information of the test signal.

The transmitting and receiving of data may include determining a type of traffic to be transmitted to a subscriber station, and if the type of the traffic is traffic providing a paid service, assigning a priority to a corresponding slot. .

The network management apparatus of the present invention is a control unit for controlling to change a parameter for transmitting and receiving data with at least one subscriber station according to the line state in the bundle cable, and controls to transmit and receive a test signal with the at least one subscriber station, It includes a transmission control unit for controlling to transmit and receive data with the subscriber station using the parameter.

The operation controller may include a parameter determiner that determines a parameter to transmit and receive a signal according to a line state with the at least one subscriber station, and determines a parameter in consideration of an adjacent channel.

The parameter determining unit may determine that the line state is satisfactory when the service quality such as bandwidth or error rate according to the line state is included in the preset range, and determine the satisfactory line state parameter as an optimal parameter value. have.

The transmission control unit may determine a line state for each line in the bundle cable, and may include a line identification unit for determining a line state of a line connected to the subscriber station by transmitting and receiving a test signal with the subscriber station.

The line identification unit may receive a signal corresponding to the test signal from the subscriber station receiving the test signal, and determine the line state of a line connected to the subscriber station using the signal received from the subscriber station.

The signal received from the subscriber station may include at least one or more of information on signal transmission, such as arrival time, reception strength, or error information of the test signal.

When the plurality of lines are connected to the bundle cable, the transmission control unit may include a synchronization unit that controls to simultaneously transmit data in synchronization with a plurality of subscriber stations connected to the same line.

The transmission control unit may include a priority allocation unit for identifying a type of traffic transmitted to the subscriber station and assigning a priority according to the type of traffic.

The priority assigning unit may control to allocate a priority to a corresponding slot when the type of the traffic is traffic providing a pay service.

When providing data using a bundle cable of a subscriber station and multiple lines, the transmission control unit transmits data in a time division manner by allocating a time slot when transmitting data, when only one subscriber station is connected to the same line. Can be controlled.

When providing data using a bundle cable of a subscriber station and multiple lines, the transmission control unit may control to transmit data simultaneously in synchronization when transmitting data, when at least a plurality of subscriber stations are connected to the same line. have.

According to the present invention, by determining the characteristics of the circuit in the network structure connected by the bundle cable to determine parameters or control the traffic type to transmit and receive data, to prevent interference between the lines in the bundle cable, to provide a more stable service environment To provide.

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

2 is a flowchart illustrating a process of applying an optimal profile according to an embodiment of the present invention.

3 is a diagram schematically illustrating a network management apparatus for providing the Internet in an access network according to an embodiment of the present invention.

4 is a diagram briefly illustrating a process of a network management apparatus measuring a subscriber device and line characteristics according to an embodiment of the present invention.

5 is a diagram illustrating an example of transmitting data in synchronization with a copper wire-based access network structure according to an embodiment of the present invention. FIG. 6 is a diagram illustrating an example of transmitting data by allocating time slots.

7 is a diagram illustrating a process of assigning priorities according to traffic types according to one 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", "... module" described in the specification means a unit for processing at least one function or operation, which may be implemented in hardware or software or a combination of hardware and software.

1 to 7, a network management apparatus for providing the Internet in an access network according to an embodiment of the present invention and a network management method using the same will be described in detail.

1 is a diagram illustrating a copper line-based access network structure according to an embodiment of the present invention. At this time, the network management system for providing the Internet in the access network shows only the schematic configuration necessary for explanation according to an embodiment of the present invention, but is not limited to such a configuration.

Referring to FIG. 1, a network management system according to an exemplary embodiment of the present invention uses a subscriber terminal using a master equipment (ME), which is a network management apparatus 100, and a bundle cable 10 in a copper wire-based access network. Connect customer premises equipment (CPE) (200a to 200f). Here, the network management apparatus 100 configures a giga Internet network by connecting a plurality of modems using copper wires.

The line connected to the network management apparatus 100 and the respective CPEs 200a to 200f includes a plurality of lines 20a to 20c, and the types and lengths of the lines are different. In this case, it is difficult to provide the same quality network service, and it is difficult to guarantee the quality of service to the subscriber by connecting multiple CPEs to one port of the master device as well as interference between adjacent lines by the bundle cable.

Therefore, the network management system according to an embodiment of the present invention grasps the characteristics of the circuits connected to the bundle cable, and manages to transmit and receive data by determining a parameter having a good quality of service according to each circuit state.

In a copper wire-based access network, data transmission and reception characteristics may vary depending on the bundle cable and the cable type and distance connected to each CPE, and because the cable connected to the master device side and the cable type connected to the CPE side have different loss, impedance, Delay time may vary.

Therefore, the network management system simultaneously transmits a test signal preset to the CPE from the network management apparatus 100 and receives the result received from the CPE to measure the line characteristics. Based on the result, the network management system can grasp the transmission strength according to the cable distance between the network management device 100 and the CPE, the band plan according to the frequency response characteristics, and the like.

In addition, the circuit characteristic measurement may be periodically performed when the network management apparatus 100 and the CPE are initially connected or when transmission characteristics including an external environment change. The data transmission / reception characteristic reflection information between the network management apparatus 100 and the CPE may be periodically updated using a MAP message which is a control signal of G.hn.

In addition, the network management system according to an embodiment of the present invention can reduce the production cost by configuring the network management device 100 and the CPE in the same block, the network matching portion is made of a detachable modular network connected You can choose to cook according to.

Accordingly, the network management system according to an embodiment of the present invention can transmit data to N CPEs in one port of the network management apparatus 100, and provides a giga-class Internet in a 1: N structure of an on-premises copper cable cable environment. can do.

2 is a flowchart illustrating a process of applying an optimal profile according to an embodiment of the present invention. The following flowchart is described using the same reference numerals in connection with the configuration of FIG. 1.

Referring to FIG. 2, an environment change (for example, adding a new CPE or changing a noise environment, etc.) during data transmission and reception between the ME 100 and each CPE (200a, 200b, 200d, 200n), or periodically channel If channel estimation is required, the ME 100 and the CPEs 200a to 200f proceed with a channel estimation initialization process (S100 and S102).

The ME 100 requests each CPE to transmit a probe signal, which is a test signal, to check the channel state, and the CPE receiving the request transmits the probe frame to the ME 100 (S104 and S106). .

The ME 100 analyzes the received probe frame to calculate the performance of each CPE channel. In addition, in order to optimize the calculated channel performance, the ME 100 repeats the probe frame transmission request and the reception of a modified parameter (S108, S110).

The ME 100 finds optimal parameters (eg, PSD, power, bit allocation, IFG, etc.) through repeated channel performance calculations. The extracted parameters are transmitted to the CPE so that the CPE can be applied not only when the ME 100 transmits to the CPE but also when the CPE transmits to the ME 100 (S112 and S114).

The ME 100 and the

CPEs

200a, 200b, 200d, and 200n may transmit data based on the extracted parameters for each node, and may provide an optimal performance by applying an optimized profile (S116). .

Here, in order for a subscriber to use a service because a set-top box or VoIP is connected to a CPE, a minimum bandwidth, latency, jitter, and the like must be guaranteed.

When the CPE receives a data request from the set-top box or the VoIP terminal, the CPE requests network resource reservation to the ME 100.

The ME 100, which has been requested for resource reservation, schedules requests of each CPE so that the corresponding data can be allocated a specific time slot.

The time slots allocated in this way are included in a control message transmitted together with the data transmission, and are known to each CPE. Premium services can be provided seamlessly through timeslot allocation, which is an advantage of the time division duplex (TDD) scheme.

3 is a diagram schematically illustrating a network management apparatus for providing an Internet in an access network according to an embodiment of the present invention. In this case, the network management apparatus only shows a schematic configuration necessary for explanation according to an embodiment of the present invention, but is not limited to such a configuration.

In addition, the network management apparatus 100 for providing the Internet in an access network according to an embodiment of the present invention includes a network matching unit 110, an operation control unit 120, and a transmission medium matching unit according to an embodiment of the present invention. 130 and the transmission control unit 140.

The network matching unit 110 connects the network management device 100 with an external network or another network. Network matching unit 110 may be selected according to the network to be produced by connecting a removable modular.

The operation control unit 120 controls to perform various operations and controls to change a parameter for transmitting and receiving data for each line.

And, the operation control unit 120 includes a parameter determination unit 122 according to an embodiment of the present invention.

The parameter determiner 122 determines a parameter for transmitting and receiving a signal when the line state with the subscriber station is satisfactory.

The transmission medium matching unit 130 is connected to the subscriber station, transmits and receives a test signal or data, and checks the connection state with the network management apparatus 100 for each line or for each subscriber station.

The transmission control unit 140 controls to transmit and receive data with the subscriber station using the determined parameter determined by the parameter determination unit 122.

When providing data using a single line with the subscriber station, the transmission control unit 140 schedules a data request signal of the subscriber station and allocates a timeslot.

When the subscriber station and data are provided using a bundle cable of a subscriber station and multiple lines, the transmission controller 140 allocates timeslots when transmitting data in a time division manner when only one subscriber station is connected to the same line. Control to send data.

In addition, when providing data using a bundle cable of a subscriber station and multiple lines, the transmission control unit 140 transmits data simultaneously in synchronization when transmitting data, if at least a plurality of subscriber stations are connected to the same line. Can be controlled.

In addition, the transmission control unit 140 includes a synchronization unit 142, a priority assignment unit 144, and a line identification unit 146 according to an embodiment of the present invention.

When a plurality of lines are connected to one line, the synchronization unit 142 controls to transmit data simultaneously in synchronization when transmitting data to a plurality of subscriber stations connected to the same line.

The priority allocating unit 144 then grasps the type of traffic transmitted to the subscriber station and controls to allocate the priority according to the type of traffic.

When the type of traffic provided to a specific subscriber station is traffic providing a paid service, the transmission control unit 140 may assign a priority to a time slot associated with the corresponding subscriber.

The line identifying unit 146 transmits and receives a test signal to and from the subscriber station, and determines a line state of a line connected to the subscriber station by using the transmitted and received test signal.

In this case, the line identifying unit 146 may receive a signal corresponding to the test signal from the subscriber station receiving the test signal, and determine the line state of the line connected to the corresponding subscriber station using the signal received from the subscriber station. The signal received from the subscriber station includes at least one information about signal transmission, such as arrival time, reception strength, or error information of the test signal.

4 is a diagram briefly illustrating a process of a network management apparatus measuring a subscriber device and line characteristics according to an embodiment of the present invention. The following flowchart is described using the same reference numerals in connection with the configuration of FIG. 1.

Referring to FIG. 4, the network management apparatus 100 transmits a test signal to at least one or more subscriber stations, and receives a signal corresponding to the test signal from the subscriber terminal that receives the test signal (S100 and S102). Here, the signal received from the subscriber station includes information about signal transmission, such as signal arrival time, signal reception strength or transmission / reception error information.

In operation S104, the network management apparatus 100 determines whether the service quality state is satisfactory. Here, the case where the quality of service condition is satisfactory includes a case where a bandwidth, an error rate, or the like according to a line state with a subscriber station is included in a preset range.

If the service quality state is not satisfactory, a test signal having a new parameter is calculated and obtained using the reception state information, and the test signal is retransmitted to the subscriber station (S106).

On the contrary, when the quality of service is satisfactory, the test signal is received from the subscriber station, and when the quality of service of the test signal transmitted by the subscriber station is also satisfactory, the transmission parameter with the corresponding subscriber station is determined (S108 to S114).

As such, when the network management apparatus 100 determines the data transmission method between the network management apparatus 100 which is a master device and each CPE which is a subscriber station, the network management apparatus 100 simultaneously transmits data to each CPE to provide a short range ( Near End) Reduce interference. Each CPE may transmit data in accordance with each line characteristic so as to reduce far end interference of a signal received from the network management apparatus 100.

5 is a diagram illustrating an example of transmitting data in synchronization in a copper line-based access network structure according to an embodiment of the present invention. 6 is a diagram illustrating an example of transmitting data by allocating time slots.

Since multiple subscribers are connected to one line, if one subscriber dominates the traffic, the other subscribers' internet speed becomes very slow. In addition, IPTV or VoIP using the Internet is a paid service in which subscribers pay a certain amount and should not be broken or degraded in providing the service.

In addition, when subscribers use a plurality of CPEs in an environment consisting of premises bundle cables, a bandwidth allocation technique in a 1: N structure is required along with an interference mitigation technique in a bundle cable.

In addition, in the environment consisting of the bundle cable in the premises, it is necessary to synchronize the data transmission in the ME to mitigate interference with adjacent channels.

Therefore, in the network management system according to an embodiment of the present invention, when

several lines

20a, 20b, and 20c are bundled in one cable as shown in FIG. 1, interference occurs in the bundle cable. As described above, the network management apparatus 100 controls to simultaneously synchronize data transmission to the CPE.

1 and 5, since only the first CPE 200a is connected to the first line 20a, the first line 20a is allocated time slots corresponding to Tx and Rx to transmit data in a time division (TDD) manner. . In addition, since the second line 20b or the third line 20c is connected to two or

more CPEs

200b and 200c and 200d to 200f, the second line 20b and the third line 20c are adjacent to each other to mitigate interference with adjacent channels in the copper wire bundle cable environment of the premises. The data of each CPE is transmitted and received according to the Tx and Rx timing of the channel.

In addition, as shown in FIG. 6, the network management apparatus 100 controls to transmit data by allocating time slots according to the amount of data transmitted between the network management apparatus 100 and each CPE.

In this case, the network management apparatus 100 may control to allocate and transmit a priority to a specific time slot when transmitting the traffic in order to improve the quality of the Internet-based pay service.

7 is a diagram illustrating a process of assigning priorities according to traffic types according to one embodiment of the present invention. The following flowchart is described using the same reference numerals in connection with the configuration of FIG. 1.

Referring to FIG. 7, when traffic is introduced from an external network or an external network, the network management apparatus 100 according to an embodiment of the present invention determines the type of the corresponding traffic (S200 and S202).

When the corresponding traffic is paid service traffic, the network management apparatus 100 assigns priority to time slots of the corresponding traffic (S204 and S206).

On the other hand, the network management apparatus 100 does not assign priority to time slots of the corresponding traffic when the type of the traffic is simple internet traffic instead of paid service traffic (S208).

In addition, the network management apparatus 100 controls to transmit data by integrating time slots to which priority is assigned and time slots to which no priority is assigned (S210).

The network management apparatus 100 according to an embodiment of the present invention allocates time slots for IPTV traffic to the corresponding subscribers without loss of IPTV traffic when paid IPTV traffic comes from a higher network, and corresponding time slots. Give priority to other traffic by giving priority to.

Therefore, even if the subscriber using the heavy traffic is on the corresponding line, if the priority is assigned to the time slot for the paying service, it is given priority over the other traffic, so that it is possible to provide a more stable service to the subscriber using the paying service.

Accordingly, the network management apparatus for providing the Internet in the access network and the network management method using the same in the access network according to an embodiment of the present invention control the transmission and reception of data by determining the characteristics of the circuit and determining the type of traffic or the type of traffic in the copper-based network structure. By doing so, interference between lines can be prevented, and an environment capable of providing more stable services can be provided.

In addition, the network management system according to an embodiment of the present invention transmits data to N CPEs in at least one or more ports of the network management apparatus 100, and provides a giga-class Internet in the 1: N structure of the premises copper cable. Provide an environment for doing this.

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. Such a recording medium can be executed not only in the server but also in the user terminal.

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 an access network structure in which a network management device and at least one subscriber terminal are connected through a bundle cable, in a method of managing a network to provide the Internet,

Transmitting a test signal with the at least one subscriber station,

Receiving a response signal for the transmission;

Analyzing the received response signal, determining parameters for optimizing the channel state in consideration of the response signal of an adjacent channel or an adjacent line, and

And transmitting and receiving data with a subscriber station using the determined parameters.
The method of claim 1,

Transmitting and receiving data with the subscriber station,

If at least two subscriber stations are connected to the same line, controlling to transmit data simultaneously in synchronization with data transmission.
The method of claim 1,

Transmitting and receiving data with the subscriber station,

If only one subscriber station is connected to the same line, assigning a time slot when transmitting data, and controlling to transmit the data in a time division manner.
The method of claim 1,

The step of transmitting the test signal,

Establishing a channel with the at least one subscriber station;

Setting the channel,

Resetting the channel when a network environment is changed.
The method of claim 4, wherein

Setting the channel,

And setting a different channel for each of the at least one subscriber station.
According to claim 1,

Determining the parameters,

And repeatedly transmitting and receiving different parameter values with the subscriber station to determine an optimal parameter value.
The method of claim 1,

Receiving a response signal for the transmission,

And receiving a signal including reception state information of the test signal.
The method of claim 7, wherein

Reception state information of the test signal,

A network management method comprising at least one of information on signal transmission, such as arrival time, reception strength, or error information of a test signal.
The method of claim 1,

Transmitting and receiving the data,

Determining the type of traffic to be transmitted to the subscriber station, and if the type of the traffic is traffic providing a paid service, controlling to assign a priority to a corresponding slot.
An operation control unit controlling to change a parameter for transmitting and receiving data with at least one subscriber station according to a line state in the bundle cable; and

A transmission control unit controlling to transmit and receive a test signal with the at least one subscriber station and to transmit and receive data with the subscriber station using the parameter

Network management device comprising a.
In claim 10,

The operation control unit,

Parameter determination unit for determining a parameter for transmitting and receiving a signal according to the line state with the at least one subscriber station, in consideration of the adjacent channel

Network management device comprising a.
In claim 11,

The parameter determiner,

And determining that the line state is satisfactory when the quality of service such as bandwidth or error rate according to the line state is within a predetermined range, and determining the satisfactory line state parameter as an optimal parameter value.
In claim 10,

The transmission control unit,

A line grasping unit for grasping the line state for each line in the bundle cable, and transmitting and receiving a test signal with the subscriber station to determine the line state of the line connected to the subscriber station

Network management device comprising a.
In claim 13,

The line grasping unit,

Receiving a signal corresponding to the test signal from the subscriber station receiving the test signal, and using the signal received from the subscriber station to determine the line state of the line connected to the subscriber station.
The method of claim 14,

The signal received from the subscriber station,

And at least one of information on signal transmission, such as arrival time, reception strength, or error information of the test signal.
In claim 10,

The transmission control unit,

When a plurality of lines are connected to the bundle cable, the synchronization unit for controlling the simultaneous transmission of data to a plurality of subscriber stations connected to the same line to transmit data

Network management device comprising a.
In claim 10,

The transmission control unit,

Priority assigning unit for identifying the type of traffic transmitted to the subscriber station and assigning priority according to the type of traffic

Network management device comprising a.
The method of claim 17,

The priority assignment unit,

And assigning a priority to a corresponding slot when the type of the traffic is traffic providing a pay service.
In claim 10,

The transmission control unit,

When providing data using a bundle cable of a subscriber station and multiple lines, if only one subscriber station is connected to the same line, network management is controlled to transmit data in a time division manner by allocating a time slot when transmitting data. Device.
In claim 10,

The transmission control unit,

When providing data using a bundle cable of a subscriber station and a plurality of lines, if at least a plurality of subscriber stations are connected to the same line, the network management device to control to transmit the data at the same time in synchronization when transmitting the data.