KR101712282B1 - Method for mesuring quality of cable signal, client application and system of enabling the method - Google Patents

Method for mesuring quality of cable signal, client application and system of enabling the method Download PDF

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Publication number
KR101712282B1
KR101712282B1 KR1020150121897A KR20150121897A KR101712282B1 KR 101712282 B1 KR101712282 B1 KR 101712282B1 KR 1020150121897 A KR1020150121897 A KR 1020150121897A KR 20150121897 A KR20150121897 A KR 20150121897A KR 101712282 B1 KR101712282 B1 KR 101712282B1
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South Korea
Prior art keywords
quality
measurement
cable modem
cable
cable signal
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KR1020150121897A
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Korean (ko)
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이정모
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주식회사 엘지유플러스
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/46—Monitoring; Testing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/04—Processing captured monitoring data, e.g. for logfile generation

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Mining & Analysis (AREA)
  • Environmental & Geological Engineering (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

According to one embodiment, a method, client application and system for measuring the quality of a cable signal are disclosed. In one embodiment, the quality of the cable signal can be measured utilizing an unused receive module of the receive module of the cable modem. One embodiment may analyze the quality of the cable signal in conjunction with the location for the cable modem to which the cable signal is transmitted.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a method for measuring quality of a cable signal, a client application,

A method, client application and system for measuring the quality of a cable signal are disclosed. Specifically, a method, a client application and a system for measuring the quality of a cable signal in a downstream frequency band utilizing a receiving module of a cable modem are disclosed.

The cable signal is transmitted to the cable modem of each household through the optical coaxial mixing network. Internet service, digital broadcasting and telephone service are provided by using the digital modulation.

For the quality control of the cable signal of the optical coaxial hybrid network, a method is used in which the maintenance personnel directly visits the measurement site and performs individual measurement. Such an off-line management method is limited in the place where the measurement can be performed on a daily basis, and the work efficiency is reduced due to a large amount of work such as connecting a measuring cable to a telephone pole at the time of measurement.

In order to solve this problem, the remote management system proposed also requires a separate quality measuring instrument and a communication cable modem to be installed at each measurement site, thereby increasing the implementation cost.

There is a need for a method for remotely measuring and managing the quality of cable signals transmitted over a downlink frequency band to a cable modem.

According to one embodiment, it is possible to remotely measure and manage the quality of a cable signal without having to install a separate measuring device in each cable modem.

According to an exemplary embodiment, a cable modem module can be used to measure a cable signal quality in a frequency band that requires measurement.

According to one embodiment, the quality value of the cable signal transmitted to the cable modem can be analyzed in conjunction with the location of the cable modem.

According to one embodiment, a method of measuring quality of a cable signal transmitted over a cable modem includes receiving a control command from a networked quality measurement system; Controlling the measurement reception module, which is one of the unused reception modules, to be tuned to the measurement target frequency included in the control command; Generating a quality value for a cable signal of the measurement subject frequency received by the measurement reception module; And feedbacking the quality value to the quality measurement system.

According to one embodiment, the cable modem includes a plurality of receiving modules, and the control command is transmitted to the cable modem, wherein any one of the unused receiving modules that are not used for the subscriber service among the plurality of receiving modules, And the quality value may be measured by the measurement receiving module.

According to an exemplary embodiment, the quality value includes at least one of a channel, a frequency, a downward reception level, a Receive Modulation Error Ratio (RxMER), and a packet loss of the measurement object frequency.

According to one embodiment, the quality measurement system may determine that an abnormality of the measurement object frequency occurs when at least one of the quality values deviates from a predefined range.

According to one embodiment, the quality measurement system analyzes the quality value in connection with the position of the cable modem, and determines that an abnormality of the measurement target frequency occurs at the position of the cable modem based on the analyzed quality value can do.

A client application for performing a quality measurement of a cable signal transmitted to a cable modem, in accordance with an embodiment, the cable modem comprising a memory for recording the application and a processor coupled to the memory, Wherein the application is configured to: receive a control command from a networked quality measurement system; Controlling the measurement reception module, which is one of the unused reception modules, to be tuned to the measurement target frequency included in the control command; Generating a quality value for a cable signal of the measurement subject frequency received by the measurement reception module; And feeding back the quality value to the quality measurement system.

According to one embodiment, a quality measurement system for managing quality of a cable signal transmitted to a cable modem includes: a memory in which a program is recorded; And a processor connected to the memory, wherein the processor for executing the program is a cable modem connected to the network, wherein the control command for allowing the measurement reception module, which is one of the unused reception modules of the cable modem, And receiving a quality value for a cable signal of the measurement object frequency from the cable modem, wherein the measurement receiving module, which is one of the unused reception modules of the cable modem, is tuned to the measurement object frequency by the control command , The measurement receiving module may receive the cable signal of the measurement target frequency to generate the quality value.

According to an embodiment, the processor may determine that an abnormality of the measurement object frequency occurs when at least one of the quality values deviates from a predefined range.

According to one embodiment, the processor analyzes the quality value in connection with the position of the cable modem, and determines that an abnormality of the measurement target frequency occurs at the position of the cable modem based on the analyzed quality value .

According to an embodiment of the present invention, there is provided a method of measuring the quality of a cable signal transmitted through a cable modem, the method comprising: receiving a control command for tuning a measurement receiving module, which is one of unused reception modules of the cable modem, Transmitting; And receiving a quality value for a cable signal of the measurement subject frequency from the cable modem, wherein the measurement receiving module, which is one of the unused reception modules of the cable modem, And the measurement receiving module can receive the cable signal of the measurement target frequency to generate the quality value.

The method of measuring quality of a cable signal according to an exemplary embodiment may further include determining that an abnormality of the measurement object frequency occurs when at least one of the quality values deviates from a predetermined range.

According to one embodiment, a method of measuring quality of a cable signal comprises analyzing the quality value in conjunction with the location of the cable modem; And determining that an abnormality of the measurement object frequency occurs at the position of the cable modem based on the analyzed quality value.

According to one embodiment, the quality of the cable signal transmitted to the cable modem can be managed remotely.

According to an exemplary embodiment, the quality measurement of the downlink cable signal transmitted through the optical coaxial mixing network can be performed without a separate apparatus.

According to one embodiment, the quality value of the cable signal can be geographically remotely managed in connection with the location for the cable modem, to the quality of the cable signal.

1 is an example of a configuration of a quality measurement system and a cable modem.
2 shows an example of a downlink frequency band transmitted by a cable modem.
3 is a flowchart illustrating an embodiment of a method for measuring quality of a cable modem.
4 is a table illustrating quality values according to one embodiment.
5 is a diagram illustrating a configuration of a quality measurement system according to an embodiment.
6A and 6B are tables for explaining an embodiment for analyzing whether or not a quality of a cable signal is abnormal.
7 is an exemplary diagram illustrating an embodiment in which the quality measurement system analyzes quality values in conjunction with the location of the cable modem.
8 is a flowchart illustrating an embodiment of a method for measuring the quality of a quality measurement system.

Various modifications may be made to the embodiments described below. It is to be understood that the embodiments described below are not intended to limit the embodiments, but include all modifications, equivalents, and alternatives to them.

The terms used in the examples are used only to illustrate specific embodiments and are not intended to limit the embodiments. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this embodiment belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. In the following description of the embodiments, a detailed description of related arts will be omitted if it is determined that the gist of the embodiments may be unnecessarily blurred.

1 is an example of a configuration of a quality measurement system and a cable modem.

Referring to FIG. 1, a quality measurement system 101 may transmit a cable signal to a cable modem 102. The cable modem 102 includes a plurality of receiving modules.

According to one embodiment, the quality measurement system 101 is connected to the cable modem termination system via the Internet. The cable modem termination system is wired or wirelessly connected to the cable modem 102. The cable signal transmitted from the quality measurement system 101 may be transmitted over the Internet to the cable modem termination system. The cable modem termination system may transmit cable signals received from the quality measurement system 101 to the cable modem 102 over the Internet. According to one embodiment, the downstream and upstream cable signals exchanged between the quality measurement system 101 and the cable modem 102 may be transmitted and received via the Internet and cable modem termination systems. The cable signal according to one embodiment may include control commands, quality values and location information of cable modems, etc. However, the range of cable signals may be extended according to the embodiment to be applied, and is not limited to the illustrated one.

In one embodiment, the quality of a cable signal can be managed remotely by using a cable modem 102 installed for an Internet service instead of a separate measuring device or a terminal. The cable modem 102 according to the embodiment has a plurality of reception modules for receiving downlink cable signals, and only a part of the reception modules are used for the subscriber service. The receiving module can provide a quality value that digitally measures the quality of the received cable signal.

The unused reception module 103 according to an exemplary embodiment includes a reception module that is not used for receiving a downlink cable signal among a plurality of reception modules or is not utilized for a subscriber service. One embodiment may utilize the unused receive module 103 to remotely control to receive cable signals in the downlink frequency band where measurements are required.

The measurement target frequency according to one embodiment means a downward frequency or a downward frequency band for which measurement is required and the measurement reception module 104 measures the quality value of the downlink cable signal of the measurement target frequency among the unused reception module 103 The receiving module corresponds to the receiving module.

The measured quality value is transmitted from the cable modem 102 to the quality measurement system 101. The quality measurement system 101 may analyze the received quality values and manage the quality of the downlink frequency band using the analyzed results.

According to an exemplary embodiment, quality of a downlink cable signal is measured and remotely managed by utilizing the unused reception module 103, so that it does not affect the Internet service being provided to a subscriber through a cable signal.

Since the location of the cable modem 102 coincides with the subscriber address of the service for which the cable signal is used, if the quality value transmitted from the cable modem 102 is associated with the geographic information, the quality measurement system 101 may determine that the cable signal quality is degraded The region can be analyzed locally. One embodiment enables quality assurance for failed cable signals based on quality values for downlink cable signals associated with geographic information.

2 shows an example of a downlink frequency band transmitted by a cable modem.

According to one embodiment, the quality measurement system 101 is connected to a cable modem 102 and a hybrid fiber coaxial network (HFC network). The HFC network is a network for transmitting upstream and downstream separated wideband radio frequency (RF) signals through a coaxial cable.

The transmission frequency band of the HFC network can be divided into an upward direction and a downward direction. According to one embodiment, the uplink frequency band transmitted from the subscriber's cable modem 102 to the quality measurement system 101 is assigned a frequency band of 5 to 42 MHz and transmitted from the quality measurement system 101 to the cable modem 102 The frequency band of 120 to 750 MHz may be allocated to the downlink frequency band. For example, data may be transmitted over one channel of 3.2 MHz, which is an upstream frequency band from the cable modem 102 to the quality measurement system 101.

Referring to FIG. 2, the downlink frequency band according to an exemplary embodiment may have a bandwidth of 6 MHz per channel. A plurality of receiving modules of the cable modem 102 can receive cable signals of frequency bands allocated to a plurality of channels. According to an exemplary embodiment, each receiving module configured to receive a specific frequency may measure a quality value for a downlink cable signal and output it as a digital value. According to an exemplary embodiment, only a part of a plurality of reception modules installed in the cable modem 102 can receive data through four channels of 6 MHz in the policy of the subscriber service. One embodiment may calibrate the unused receiving module 103 to receive a cable signal in the downstream frequency band and measure the quality value for the cable signal of the frequency to be measured. A method of measuring the quality of a cable signal transmitted to the cable modem 102 will be described with reference to FIGS. 3 and 4. FIG.

3 is a flowchart illustrating an embodiment of a method for measuring the quality of a cable signal transmitted to a cable modem.

Referring to FIG. 3, the cable modem 102 receives a control command from a network-connected quality measurement system 101 (301).

According to one embodiment, the control command includes information related to the frequency to be measured. According to another embodiment, the control command includes a command to control one of the measurement target frequency and the unused reception module 103 that is not used for the subscriber service among the plurality of reception modules to be tuned to the measurement target frequency. According to another embodiment, the control command includes information about a measurement receiving module 104 that receives a cable signal of a measurement target frequency and a measurement target frequency.

The cable modem 102 receives information from the quality measurement system 101 only for i) information about the frequency to be measured, or ii) for tuning any of the frequency to be measured and the unused reception module 103 to the quality measurement system 101 Or iii) receive information about the frequency to be measured and the measurement receiving module 104 from the quality measuring system 101. [ The control command transmitted to the cable modem 102 is not limited to the above embodiment, but may be modified by adding additional information to the measurement target frequency.

According to one embodiment, the cable modem 102 may control 302 that any one of the unused reception modules 103, the measurement reception module 104, is tuned to the measurement target frequency.

According to one embodiment, if the control command includes information about the measurement receiving module 104, the cable modem 102 may tune the measurement receiving module 104. [ In the case of the embodiment in which the measurement receiving module 104 is not specified in the control command, the cable modem 102 can tune any of the unused receiving modules 103.

According to an exemplary embodiment, a quality value for a cable signal of a measurement target frequency received by the measurement receiving module 104 may be generated (303).

The measurement receiving module 104 tuned to the measurement target frequency can receive the cable signal of the measurement target frequency. The measurement receiving module 104 can measure the quality value of the cable signal of the frequency to be measured. According to one embodiment, the measurement receiving module 104 may generate and output the measured quality value.

According to one embodiment, the generated quality value may be fed back from the cable modem 102 to the quality measurement system 101 (304).

According to one embodiment, the quality value is transmitted from the cable modem 102 to the quality measurement system 101 over the upstream frequency band. The quality measurement system 101 may analyze the quality of the downlink cable signal in conjunction with the location of the cable modem 102 using the received quality value. The quality measurement system 101 may determine that an abnormality has occurred with respect to the measurement object frequency with respect to the position of the cable modem 102 based on the analysis result.

4 is a table illustrating quality values according to one embodiment.

The measurement receiving module 104 tuned to the frequency to be measured measures the quality value by receiving the cable signal of the frequency to be measured. In one embodiment, the measured quality value is a channel, frequency, RxMER (Receive Modulation Error Ratio), and packet loss. The quality value measured by the measurement receiving module 104 is transmitted from the cable modem 102 to the quality measuring system 101 and the quality value is correlated with the cable modem 102 and analyzed by the quality measuring system 101 .

According to one embodiment, the quality measurement system 101 receives the ID and quality value of the cable modem 102 from the cable modem 102, maps the quality value to the cable modem 102, The quality of the signal can be managed.

The quality measurement system 101 may compare the quality value corresponding to the cable modem 102 with a predefined range to determine whether an abnormality occurs in the cable signal of the measurement target frequency. The predefined range for comparing the quality values can be defined as whether or not the predefined time exceeds a predefined criterion, and variations thereof are possible. The contents of the quality measurement system 101 will be described below with reference to FIGS. 5 to 8. FIG.

Although not shown, a client application according to one embodiment may perform a quality measurement of a cable signal transmitted to the cable modem 102.

The cable modem 102 includes a processor coupled to a memory and a memory for writing the client application, and the processor is capable of executing the client application.

The client application may receive the control command from the networked quality measurement system 101.

The client application can control the cable modem 102 to tune the measurement reception module 104, which is one of the unused reception modules 103, to the measurement target frequency included in the control command.

The client application may generate a quality value for the cable signal of the measurement target frequency received by the measurement reception module 104 and feed back the generated quality value to the quality measurement system 101.

The operation performed by the client application can be applied to an embodiment of a method for measuring the quality of a cable signal described with reference to Figs.

5 is a diagram illustrating a configuration of a quality measurement system according to an embodiment.

According to one embodiment, the quality measurement system 101 includes a memory 502 and a processor 503. The quality measurement system 101 may manage the quality of the cable signal transmitted to the cable modem 102.

In the memory 502, a program executed by the processor 503 is recorded. The processor 503 is connected to the memory 502. According to one embodiment, the memory 502 may be mounted within the quality measurement system 101 and may be external and networked with the processor 502 of the quality measurement system 101.

The processor 503 can load and execute the program recorded in the memory 502. [

According to one embodiment, the processor 503 may transmit a control command including a measurement object frequency to the cable modem 102 connected to the network. As described above, the quality measurement system 101 and the cable modem 102 can be connected to the optical coaxial hybrid network to transmit and receive cable signals, and the uplink frequency band and the downlink frequency band can be predefined and allocated. According to one embodiment, the measurement subject frequency may correspond to any of the down frequency bands required for measurement.

The processor 503 may receive from the cable modem 102 a quality value for the cable signal of the measured frequency of interest generated based on the control command.

By the control command transmitted from the quality measurement system 101, the cable modem 102 can tune the measurement reception module 104, which is one of the unused reception modules 103, to the measurement target frequency. The tuned measurement receiving module 104 may receive the cable signal of the frequency to be measured and generate a quality value. The embodiment in which the cable modem 102 transmits the quality value to the quality measuring system 101 based on the received control command is as described with reference to Figs.

The control command transmitted from the quality measurement system 101 to the cable modem 102 by the processor 503 is the same as the embodiment described with reference to Fig.

6A and 6B are tables for explaining an embodiment for analyzing whether or not a quality of a cable signal is abnormal.

According to one embodiment, the quality measurement system 101 may collect quality values transmitted from the cable modem 102 and analyze whether or not a quality of cable signal is abnormal based on the collected quality values.

Referring to FIGS. 6A and 6B, the quality value received by the quality measurement system 101 includes a channel, frequency, downward reception level, RxMER (Receive Modulation Error Ratio), and packet loss of a measurement target frequency.

The processor 503 may determine that the quality of the cable signal of the measurement target frequency is abnormal when at least one of the quality values is out of the predefined range. The processor 503 may determine that an abnormality of the measurement object frequency occurs with respect to the position of the cable modem 102 based on the analyzed quality value.

Referring to FIG. 6A, when the downward reception level of the quality value is instantaneously decreased, the processor 503 may determine that there is an abnormality in the cable signal of the measurement target frequency. The processor 503 analyzes the quality value received from the area where the cable modem 102 is located and determines that the instantaneous decrease pattern of the downward reception level is occurring, It can be decided that improvement is needed.

Referring to FIG. 6B, the processor 503 may determine that an abnormality has occurred with respect to a cable signal of a measurement target frequency when a quality value that does not satisfy a predetermined criterion for a specific channel among a plurality of channels continues. Referring to FIG. 6B, when the quality value of the Rx MER and the packet loss deviating from the predetermined reference is continuously observed for the '176' channel, the processor 503 requires maintenance of the cable signal of the measurement target frequency of the corresponding channel You can decide.

7 is an exemplary diagram illustrating an embodiment in which the quality measurement system analyzes quality values in conjunction with the location of the cable modem.

Processor 503 may analyze the quality value for the cable signal provided by cable modem 102 in conjunction with the location of cable modem 102. [ The processor 503 collects the quality value and analyzes whether or not the quality abnormality is occurring. The processor 503 can track the problem in the area where the abnormality occurs in the cable signal of the measurement target frequency in association with the geographical information.

Referring to FIG. 7, the processor 503 can confirm the location of a plurality of cable modems in association with geographical information. Processor 503 may analyze the quality values collected from cable modem 102 in conjunction with the location of cable modem 102 and display it on a map. The processor 503 may analyze the location and quality value of the cable modem 102 displayed on the map, and display the map in association with whether or not an error has occurred. Referring to FIG. 7, the processor 503 analyzes a problem with a cable signal of a frequency to be measured, and displays it on a map when it is determined that maintenance is required. Processor 503 may perform quality value analysis on the cable signal in conjunction with geographic information and track problems with the location of the anomaly along with the location of the cable modem.

This allows the quality measurement system 101 to integrally manage the quality of the cable signal associated with the geographic information based on the collected quality values, without having to require the subscriber to install a separate cable signal quality measurement device .

8 is a flowchart illustrating an embodiment of a method for measuring the quality of a quality measurement system.

Referring to FIG. 8, the quality measuring system 101 transmits a control command including a measurement object frequency to a cable modem 102 connected to the network (801).

The quality measurement system 101 receives a quality value for the cable signal of the measurement object frequency from the cable modem 102 (802).

The quality measurement system 101 may analyze the received quality value in conjunction with the location of the cable modem 102 (803). According to one embodiment, the quality measurement system 101 may determine that an abnormality has occurred in the location of the cable modem 102 based on the analyzed quality value.

An embodiment of the quality measuring method of the quality measuring system 101 described with reference to Fig. 8 can be applied to the embodiment described with reference to Figs. 5 to 7.

The method according to an embodiment of the present invention may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

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. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

101: Quality measurement system
102: Cable modem

Claims (23)

A method for measuring the quality of a cable signal transmitted by a cable modem,
Receiving a control command from a networked quality measurement system;
Controlling the measurement receiving module, which is one of the unused reception modules, to be tuned to the measurement target frequency included in the control command;
Generating a quality value for a cable signal of the measurement subject frequency received by the measurement reception module; And
Feedbacking the quality value to the quality measurement system
Lt; / RTI >
Wherein the unused reception module is a reception module which is not used for receiving a downlink cable signal among a plurality of reception modules of the cable modem or is not used for a subscriber service,
The step of controlling to be tuned to the measurement target frequency
Selecting at least one unused reception module among a plurality of reception modules included in the cable modem based on whether or not the downlink cable signal is received and used for the subscriber service;
Selecting the measurement reception module which is one of the selected at least one unused reception module; And
Tuning the measurement receiving module to receive a downlink cable signal of the measurement subject frequency
/ RTI >
A method for measuring the quality of a cable signal.
The method according to claim 1,
Wherein the cable modem comprises the plurality of receiving modules,
Wherein the control command includes an instruction to control one of the unused reception modules not used for the subscriber service among the plurality of reception modules to be tuned to the measurement target frequency,
Wherein the quality value is measured by the measurement receiving module,
A method for measuring the quality of a cable signal.
The method according to claim 1,
The quality value may be,
Wherein the at least one of the channel, the frequency, the downward reception level, the Receive Modulation Error Ratio (RxMER)
A method for measuring the quality of a cable signal.
The method of claim 3,
The quality measurement system
Determining that an abnormality of the measurement target frequency has occurred when at least one of the quality values is out of a predefined range;
A method for measuring the quality of a cable signal.
The method according to claim 1,
The quality measurement system comprising:
Analyzing the quality value in connection with the location of the cable modem,
And determining that an abnormality of the measurement object frequency occurs at the position of the cable modem based on the analyzed quality value,
A method for measuring the quality of a cable signal.
A client application for performing a quality measurement of a cable signal transmitted by a cable modem,
The cable modem comprising a memory for writing the client application and a processor coupled to the memory, the client application being executed by the processor,
The client application,
Receiving a control command from a networked quality measurement system;
Controlling the measurement receiving module, which is one of the unused reception modules, to be tuned to the measurement target frequency included in the control command;
Generating a quality value for a cable signal of the measurement subject frequency received by the measurement reception module; And
Feedbacking the quality value to the quality measurement system
Lt; / RTI >
Wherein the unused reception module is a reception module which is not used for receiving a downlink cable signal among a plurality of reception modules of the cable modem or is not used for a subscriber service,
The step of controlling to be tuned to the measurement target frequency
Selecting at least one unused reception module among a plurality of reception modules included in the cable modem based on whether or not the downlink cable signal is received and used for the subscriber service;
Selecting the measurement reception module which is one of the selected at least one unused reception module; And
Tuning the measurement receiving module to receive a downlink cable signal of the measurement subject frequency
/ RTI >
Client applications stored in the memory of the cable modem.
The method according to claim 6,
Wherein the cable modem comprises the plurality of receiving modules,
Wherein the control command includes an instruction to control one of the unused reception modules not used for the subscriber service among the plurality of reception modules to be tuned to the measurement target frequency,
Wherein the quality value is measured by the measurement receiving module,
Client applications stored in the memory of the cable modem.
The method according to claim 6,
The quality value may be,
Wherein the at least one of the channel, the frequency, the downward reception level, the Receive Modulation Error Ratio (RxMER)
Client applications stored in the memory of the cable modem.
9. The method of claim 8,
The quality measurement system
Determining that an abnormality of the measurement target frequency has occurred when at least one of the quality values is out of a predefined range;
Client applications stored in the memory of the cable modem.
The method according to claim 6,
The quality measurement system comprising:
Analyzing the quality value in connection with the location of the cable modem,
And determining that an abnormality of the measurement object frequency occurs at the position of the cable modem based on the analyzed quality value,
Client applications stored in the memory of the cable modem.
A quality measuring system for managing quality of a cable signal transmitted to a cable modem,
A memory in which a program is recorded; And
A processor coupled to the memory,
Lt; / RTI >
Wherein the processor executing the program further comprises:
Transmitting a control command for tuning the measurement reception module, which is one of the unused reception modules of the cable modem, to the measurement target frequency with a networked cable modem,
Receiving a quality value for a cable signal of the measurement object frequency from the cable modem,
Wherein the unused reception module is a reception module which is not used for receiving a downlink cable signal among a plurality of reception modules of the cable modem or is not used for a subscriber service,
The cable modem
Selects at least one unused reception module among a plurality of reception modules included in the cable modem based on whether the downlink cable signal is received or not and is used for the subscriber service,
Selects at least one of the at least one unused reception module, the at least one unused reception module,
The measurement receiving module tuning to receive a downlink cable signal of the measurement target frequency,
Quality measurement system.
12. The method of claim 11,
Wherein the measurement receiving module is tuned to the measurement target frequency by the control command and receives the cable signal of the measurement target frequency to generate the quality value,
Quality measurement system.
12. The method of claim 11,
Wherein the cable modem comprises the plurality of receiving modules,
Wherein the quality value is measured by the measurement receiving module,
Quality measurement system.
12. The method of claim 11,
The quality value may be,
Wherein the at least one of the channel, the frequency, the downward reception level, the Receive Modulation Error Ratio (RxMER)
Quality measurement system.
15. The method of claim 14,
The processor comprising:
Determining that an abnormality of the measurement target frequency has occurred when at least one of the quality values is out of a predefined range;
Quality measurement system.
12. The method of claim 11,
The processor comprising:
Analyzing the quality value in connection with the location of the cable modem,
And determining that an abnormality of the measurement object frequency occurs at the position of the cable modem based on the analyzed quality value,
Quality measurement system.
A method for measuring the quality of a cable signal transmitted by a cable modem,
Transmitting a control command for tuning a measurement receiving module, which is one of unused reception modules of the cable modem, to a measurement target frequency with a networked cable modem; And
Receiving a quality value for a cable signal of the measurement object frequency from the cable modem
Lt; / RTI >
Wherein the unused reception module is a reception module which is not used for receiving a downlink cable signal among a plurality of reception modules of the cable modem or is not used for a subscriber service,
The cable modem
Selects at least one unused reception module among a plurality of reception modules included in the cable modem based on whether the downlink cable signal is received or not and is used for the subscriber service,
Selects at least one of the at least one unused reception module, the at least one unused reception module,
The measurement receiving module tuning to receive a downlink cable signal of the measurement target frequency,
A method for measuring the quality of a cable signal.
18. The method of claim 17,
Wherein the measurement receiving module is tuned to the measurement target frequency by the control command and receives the cable signal of the measurement target frequency to generate the quality value,
A method for measuring the quality of a cable signal.
18. The method of claim 17,
Wherein the cable modem comprises the plurality of receiving modules,
Wherein the quality value is measured by the measurement receiving module,
A method for measuring the quality of a cable signal.
18. The method of claim 17,
The quality value may be,
Wherein the at least one of the channel, the frequency, the downward reception level, the Receive Modulation Error Ratio (RxMER)
A method for measuring the quality of a cable signal.
21. The method of claim 20,
Determining that an abnormality of the measurement object frequency occurs when at least one of the quality values is out of a predefined range
≪ / RTI >
A method for measuring the quality of a cable signal.
18. The method of claim 17,
Analyzing the quality value in connection with the location of the cable modem; And
Determining that an abnormality of the measurement object frequency occurs at a position of the cable modem based on the analyzed quality value
≪ / RTI >
A method for measuring the quality of a cable signal.
delete
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060118053A (en) * 2005-05-16 2006-11-23 엘지전자 주식회사 Apparatus for monitoring digital broadcasting signal
JP2009010815A (en) * 2007-06-29 2009-01-15 Oss Broadnet Kk Catv transmission line monitoring apparatus, method and program

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060118053A (en) * 2005-05-16 2006-11-23 엘지전자 주식회사 Apparatus for monitoring digital broadcasting signal
JP2009010815A (en) * 2007-06-29 2009-01-15 Oss Broadnet Kk Catv transmission line monitoring apparatus, method and program

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