KR102626344B1 - Apparatus and method for detecting jitter occurrence position - Google Patents

Abstract

In order to achieve the above object, a jitter generation location identification device according to an embodiment of the present invention includes a receiving unit that receives an output signal from a digital switching network, measures phase jitter in the signal, and determines the measured value and occurrence time of the phase jitter. It includes a storage unit for storing, a determination unit for determining the location of occurrence of the phase jitter, and a display unit for displaying a result of determining the location of the occurrence of the phase jitter.

Description

Jitter occurrence location identification device and method {APPARATUS AND METHOD FOR DETECTING JITTER OCCURRENCE POSITION}

The present invention relates to a technology for identifying the location of phase jitter through the characteristics of jitter generated in digital switching networks and communication lines.

Specifically, the present invention relates to a technology for measuring the phase jitter of a received signal and identifying the location of the phase jitter based on the periodic characteristics of the phase jitter.

There are two main causes of jitter. First, jitter may occur due to clock frequency mismatch due to limitations in the accuracy and stability of the clock generated in the digital switching network. Additionally, jitter may occur due to the effects of noise on communication lines caused by external electromagnetic fields.

For quick maintenance when a communication error occurs, it is necessary to quickly identify the location of jitter. Currently, most measuring devices can only measure BER (Bit Error Rate) at the terminal, but there is no device that identifies the location of jitter. It is a state. Therefore, there is an urgent need for technology to identify the location of jitter.

Domestic Patent Publication No. 10-2013-0010448 (Title of invention: Method and device for reducing jitter) Domestic Patent Publication No. 10-2021-0018892 (Title of invention: Method for determining jitter attack, jitter attack detection device, and computer program)

The purpose of the present invention is to quickly identify whether the phase jitter occurs in the digital switching network or the communication line by installing a device at the end of the communication line of the digital switching network.

Additionally, an object of the present invention is to identify the location of occurrence of phase jitter depending on whether the phase jitter has periodic characteristics.

In order to achieve the above object, a jitter generation location identification device according to an embodiment of the present invention includes a receiving unit that receives an output signal from a digital switching network, measures phase jitter in the signal, and determines the measured value and occurrence time of the phase jitter. It includes a storage unit for storing, a determination unit for determining the location of occurrence of the phase jitter, and a display unit for displaying a result of determining the location of the occurrence of the phase jitter.

At this time, the storage unit may store the occurrence time of the phase jitter if the measured value is greater than or equal to a threshold.

At this time, if the measured value of the storage unit is greater than or equal to a threshold, the determination unit may analyze the periodic characteristics of the phase jitter based on the occurrence time of the phase jitter that occurred within a preset time.

At this time, the determination unit may analyze the periodic characteristics of the phase jitter based on the occurrence time of the stored phase jitter, and determine the occurrence location of the phase jitter based on whether the phase jitter has periodic characteristics. .

At this time, the determination unit may determine that the phase jitter occurs in a digital switching network when the phase jitter has periodic characteristics, and may determine that the phase jitter occurs in a communication line if the phase jitter does not have periodic characteristics. there is.

At this time, the display unit may display the average value of phase jitter during the preset period based on the interrupt occurring at the preset period.

At this time, the determination unit stores the occurrence time of the phase jitter if the measured value of the storage unit is greater than or equal to the threshold, and analyzes the periodic characteristics of the occurrence time of the phase jitter that occurred for 1,800 seconds from the jitter occurrence time of the phase. .

At this time, the jitter generation location identification device according to an embodiment of the present invention may further include an output unit that outputs a signal with periodicity.

At this time, the output signal of the digital switching network may be generated based on the signal having the periodicity.

In addition, a method for identifying a jitter occurrence location according to an embodiment of the present invention to achieve the above object includes the steps of receiving an output signal of a digital switching network, measuring phase jitter in the signal, a measured value of the phase jitter, and It includes the steps of storing the occurrence time, determining the occurrence location of the phase jitter, and displaying the result of determining the occurrence location of the phase jitter.

At this time, the storing step may store the occurrence time of the phase jitter if the measured value of the measuring step is greater than or equal to a threshold value.

At this time, in the determining step, if the measured value is greater than or equal to a threshold, the periodic characteristics of the phase jitter may be analyzed based on the occurrence time of the phase jitter that occurred within a preset time.

At this time, the determining step includes analyzing periodic characteristics of the phase jitter based on the occurrence time of the stored phase jitter, and determining the location of occurrence of the phase jitter based on whether the phase jitter has periodic characteristics. It may include a determination step.

At this time, in the determining step, if the phase jitter has periodic characteristics, it is determined that the phase jitter occurred in the digital switching network, and if the phase jitter does not have periodic characteristics, it is determined that the phase jitter occurred in the communication line. can do.

At this time, the display step may display the average value of phase jitter during the preset period based on an interrupt occurring at a preset period.

At this time, in the determining step, if the measured value is greater than or equal to the threshold, the occurrence time of the phase jitter may be stored, and the periodic characteristics of the occurrence time of the phase jitter occurring for 1,800 seconds from the occurrence time of the phase jitter may be analyzed.

At this time, the output signal of the digital switching network may be generated based on a signal with periodicity.

According to the present invention, by mounting a device at the end of a communication line of a digital switching network, it is possible to quickly identify whether the location of phase jitter is the digital switching network or a communication line.

Additionally, according to the present invention, the occurrence location of phase jitter can be identified depending on whether the phase jitter has periodic characteristics.

Figure 1 is a diagram illustrating an example of determining the location of phase jitter using a jitter location identification device according to an embodiment of the present invention.
Figure 2 is a block diagram showing the configuration of a jitter generation location identification device according to an embodiment of the present invention.
Figure 3 is a block diagram showing in detail the configuration of a jitter generation location identification device according to an embodiment of the present invention.
Figure 4 is a flowchart showing a method for identifying a jitter occurrence location according to an embodiment of the present invention.
Figure 5 is a flowchart showing in detail a step (S440) of a method for identifying a jitter occurrence location according to an embodiment of the present invention.
Figure 6 is a diagram showing the configuration of a computer system according to an embodiment.

The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and will be implemented in various different forms. The present embodiments only serve to ensure that the disclosure of the present invention is complete and that common knowledge in the technical field to which the present invention pertains is not limited. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Although terms such as “first” or “second” are used to describe various components, these components are not limited by the above terms. The above terms may be used only to distinguish one component from another component. Accordingly, the first component mentioned below may also be the second component within the technical spirit of the present invention.

The terms used in this specification are for describing embodiments and are not intended to limit the invention. As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context. As used in the specification, “comprises” or “comprising” implies that the mentioned component or step does not exclude the presence or addition of one or more other components or steps.

Unless otherwise defined, all terms used in this specification can be interpreted as meanings commonly understood by those skilled in the art to which the present invention pertains. Additionally, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless clearly specifically defined.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. When describing with reference to the drawings, identical or corresponding components will be assigned the same reference numerals and redundant description thereof will be omitted. .

When communicating between terminals, jitter may occur and cause bit errors in data communication. Jitter mostly occurs in digital switching networks or communication lines, and the present invention provides a function to identify whether the jitter occurs in a digital switching network or communication line.

Figure 1 is a diagram illustrating an example of determining the location of phase jitter using a jitter location identification device according to an embodiment of the present invention.

Referring to FIG. 1, a signal is transmitted from jitter occurrence location determination device A (110), passes through digital exchange A (120), digital exchange network 130, and digital exchange B (140) to jitter occurrence location determination device B (150). You can see that the signal is being received.

At this time, signal transmission from jitter generation location determination device A (110) to digital switch A (120) may be accomplished through a communication line such as TIP/RING. Likewise, signal transmission from digital exchange B (140) to jitter generation location determination device B (150) can also be accomplished through a communication line such as TIP/RING.

At this time, signal transmission from digital exchange A (120) to digital switching network (130) can be accomplished using a dedicated line such as T1/E1. Likewise, signal transmission from the digital switching network 130 to the digital switching device B 140 can also be accomplished using a dedicated line such as T1/E1.

At this time, the characteristics of the phase jitter in the signal received by the jitter occurrence location determination device B (150) can be analyzed and the location where the phase jitter occurred can be determined.

As shown in FIG. 1, the jitter generation location identification device according to an embodiment of the present invention is mounted at the end of the communication line of the digital switching network 130 to quickly determine whether the location where the phase jitter occurs is the digital switching network 130 or the communication line. can be identified.

Figure 2 is a block diagram showing the configuration of a jitter generation location identification device according to an embodiment of the present invention.

Referring to FIG. 2, the jitter generation location identification device according to an embodiment of the present invention includes a receiving unit 210 that receives an output signal from a digital switching network, measures phase jitter in the signal, and provides a measured value and generation of the phase jitter. It may include a storage unit 220 that stores time, a determination unit 230 that determines the occurrence location of the phase jitter, and a display unit 240 that displays the result of determining the occurrence location of the phase jitter.

At this time, although not shown in FIG. 2, the jitter generation location identification device according to an embodiment of the present invention may further include an output unit that outputs a signal with periodicity.

Additionally, the output signal of the digital switching network received by the receiver 210 may be generated based on the signal having the periodicity.

At this time, the storage unit 220 measures phase jitter in the received signal, and if the measured value is greater than or equal to a threshold, it may determine that phase jitter has occurred and store the occurrence time of the phase jitter.

At this time, the output signal of the digital switching network may be generated based on a signal generated by a second device that is different from the first device that identifies the location of the phase jitter.

For example, the threshold may be a value corresponding to 7 Degrees, but the scope of the present invention is not limited thereto.

At this time, if the measured value of the storage unit 220 is greater than or equal to the threshold, the determination unit 230 analyzes the periodic characteristics of the phase jitter based on the occurrence time of the phase jitter that occurred within a preset time from the occurrence time of the stored phase jitter. You can.

For example, if the measured value of the storage unit 220 is above the threshold, the occurrence time of the phase jitter can be stored, and the periodic characteristics of the occurrence time of the phase jitter that occurred for 1,800 seconds from the occurrence time of the phase jitter can be analyzed. there is.

At this time, the determination unit 230 may analyze the periodic characteristics of the occurrence time of the phase jitter that occurred 1,800 seconds before or 1,800 seconds after the occurrence time of the phase jitter.

The period of phase jitter occurring in a digital switching network mostly occurs at intervals of 3 to 1,500 seconds, and the analysis time can be set differently depending on the cycle of occurrence of phase jitter and changes in the digital switching network and communication environment.

At this time, the determination unit 230 may determine the occurrence location of the phase jitter based on a result of analyzing the periodic characteristics of the phase jitter based on the occurrence time of the phase jitter.

More specifically, the determination unit 230 may determine that phase jitter has occurred in the digital switching network if the phase jitter has periodic characteristics, and may determine that phase jitter has occurred in the communication line if the phase jitter does not have periodic characteristics. there is.

Phase jitter that occurs in switches of a digital switching network is caused by clock frequency mismatch between exchanges due to limitations in the accuracy and stability of clocks generated in the switches of a digital switching network, so it tends to occur repeatedly at regular intervals.

Additionally, phase jitter occurring in communication lines tends to occur randomly without a regular period due to noise in the communication line.

Therefore, the location of phase jitter can be easily identified based on the characteristics of the phase jitter occurring in the digital switching network and the phase jitter occurring in the communication line.

At this time, the display unit 240 may display the average value of phase jitter during the preset period based on the interrupt occurring at the preset period.

Figure 3 is a block diagram showing in detail the configuration of a jitter generation location identification device according to an embodiment of the present invention.

Referring to FIG. 3, the jitter generation location identification device according to an embodiment of the present invention includes a tone generator 360, a tone receiver 310, a phase jitter measurement unit 320, a phase jitter storage unit 330, and a phase jitter storage unit 330. It may include a jitter determination unit 340 and a phase jitter average value and occurrence location display unit 350.

At this time, the tone generator 360 can generate and transmit a 1004Hz tone (sine wave). However, the signal generated by the tone generator 360 is not limited to this and may have various frequency ranges.

At this time, the output signal of the digital switching network may be generated based on a signal generated by a second device that is different from the first device that identifies the location of the phase jitter.

That is, the signal generated by the tone generator 360 of the second device can be transmitted to the receiving unit 310 of the first device through a communication line and a digital switching network.

At this time, the phase jitter measurement unit 320 may measure the phase jitter of the received tone and store the measured value.

At this time, the phase jitter storage unit 330 may store the jitter generation time when the measured value of the phase jitter in the measurement unit 320 is greater than or equal to the threshold value.

At this time, the phase jitter determination unit 340 can identify periodic characteristics by reading the occurrence time of the phase jitter.

Referring to FIG. 1, jitter occurrence location determination device A (110) transmits a tone, and jitter occurrence location determination device B (150) receives the tone, measures the phase jitter, stores the measured value, and the measured value is set to the threshold. If it is more than (for example, 7 Degree), the occurrence time is saved (recorded).

At this time, by generating an interrupt at intervals of 0.3 seconds, the average phase jitter value for 0.3 seconds can be displayed on the LCD. However, the cycle for generating the interrupt is illustrative and the scope of the present invention is not limited thereto.

At this time, when the measured value of the phase jitter measurement unit 320 is a threshold increase, the phase jitter determination unit 340 analyzes the periodic characteristics of the occurrence time of the phase jitter that occurred for 1,800 seconds based on the current time.

As a result of analyzing periodic characteristics, if phase jitter occurs periodically, it is identified as having occurred in the digital switching network. If it occurs randomly without periodic characteristics, it is identified as phase jitter occurring in the communication line, and the results are displayed on the LCD. do.

Figure 4 is a flowchart showing a method for identifying a jitter occurrence location according to an embodiment of the present invention.

Referring to FIG. 4, the jitter generation location identification method according to an embodiment of the present invention receives an output signal from a digital switching network through a receiver (S410).

At this time, the output signal of the digital switching network may be generated based on a signal generated by a second device that is different from the first device that identifies the location of the phase jitter.

Next, phase jitter is measured in the received signal (S420), and the measured value and occurrence time of the phase jitter are stored (S430).

At this time, the step of storing the measured value and occurrence time of the phase jitter (S430) includes storing the measured value of phase jitter, determining whether the measured value is greater than or equal to the threshold, and determining whether the measured value is greater than or equal to the threshold. It may include the step of storing the occurrence time of.

Next, the location of the phase jitter may be determined (S440), and the result of determining the location of the phase jitter may be displayed (S450).

Figure 5 is a flowchart showing in detail a step (S440) of a method for identifying a jitter occurrence location according to an embodiment of the present invention.

Referring to FIG. 5, in the step of determining the occurrence location of the phase jitter (S440), the periodic characteristics of the phase jitter may be analyzed based on the occurrence time of the phase jitter (S442).

Next, depending on whether the phase jitter has periodic characteristics (S444), if the phase jitter has periodic characteristics, it is determined that phase jitter has occurred in the digital switching network, and the phase jitter is random without periodic characteristics. If this occurs, it can be determined that phase jitter has occurred in the communication line (S446, S448).

At this time, in the step of determining the occurrence location of the phase jitter (S440), if the measured value is above the threshold, the occurrence time of the phase jitter is stored, and the occurrence time of the phase jitter occurring for 1,800 seconds from the occurrence time of the phase jitter is periodically calculated. By analyzing the characteristics, the location of phase jitter can be determined.

At this time, the step of determining the occurrence location of the phase jitter (S440) may analyze the periodic characteristics of the occurrence time of the phase jitter that occurred 1,800 seconds before or 1,800 seconds after the occurrence time of the phase jitter.

At this time, the step of displaying the result of determining the location of the phase jitter (S450) may display the average value of the phase jitter during the preset period based on the interrupt occurring at the preset period.

Figure 6 is a diagram showing the configuration of a computer system according to an embodiment.

The jitter generation location identification device according to the embodiment may be implemented in a computer system 1000 such as a computer-readable recording medium.

Computer system 1000 may include one or more processors 1010, memory 1030, user interface input device 1040, user interface output device 1050, and storage 1060 that communicate with each other via bus 1020. You can. Additionally, the computer system 1000 may further include a network interface 1070 connected to the network 1080. The processor 1010 may be a central processing unit or a semiconductor device that executes programs or processing instructions stored in the memory 1030 or storage 1060. The memory 1030 and storage 1060 may be storage media including at least one of volatile media, non-volatile media, removable media, non-removable media, communication media, and information transfer media. For example, memory 1030 may include ROM 1031 or RAM 1032.

As described above, according to the present invention, by analyzing the characteristics of jitter occurring in digital switching networks and communication lines, the location of occurrence can be quickly identified. In addition, it has the effect of being able to know the communication quality of the communication network and quickly identify areas for maintenance and maintenance.

The specific implementations described in the present invention are examples and are not intended to limit the scope of the present invention in any way. For the sake of brevity of the specification, descriptions of conventional electronic components, control systems, software, and other functional aspects of the systems may be omitted. In addition, the connections or connection members of lines between components shown in the drawings exemplify functional connections and/or physical or circuit connections, and in actual devices, various functional connections or physical connections may be replaced or added. Can be represented as connections, or circuit connections. Additionally, if there is no specific mention such as “essential,” “important,” etc., it may not be a necessary component for the application of the present invention.

Therefore, the spirit of the present invention should not be limited to the above-described embodiments, and the scope of the patent claims described below as well as all scopes equivalent to or equivalently changed from the scope of the claims are within the scope of the spirit of the present invention. It will be said to belong to

210: receiving unit
220: storage unit
230: Determination unit
240: display unit

Claims (14)

A receiving unit that receives an output signal from a digital switching network;
a storage unit that measures phase jitter in the signal and stores the measured value and occurrence time of the phase jitter;
a determination unit that determines a location of occurrence of the phase jitter; and
a display unit that displays a result of determining the location of occurrence of the phase jitter;
Including,
The determination unit
If the measured value is above the threshold, the periodic characteristics of the phase jitter are analyzed based on the occurrence time of the phase jitter that occurred within a preset time,
If the phase jitter has periodic characteristics, it is determined that the phase jitter occurs in a digital switching network,
A jitter generation location identification device characterized in that it is determined that the phase jitter occurs in a communication line when the phase jitter does not have periodic characteristics. In claim 1,
The storage unit
A jitter generation location identification device, characterized in that if the measured value is greater than or equal to a threshold, the occurrence time of the phase jitter is stored. delete In claim 1,
The determination unit
Analyzing the periodic characteristics of the phase jitter based on the stored occurrence time of the phase jitter, and determining the occurrence location of the phase jitter based on whether the phase jitter has periodic characteristics. Identification device. delete In claim 1,
The display unit
A jitter occurrence location identification device characterized in that it displays the average value of phase jitter during the preset period based on an interrupt that occurs at a preset period. In claim 1,
It further includes an output unit that outputs a signal with periodicity,
A jitter generation location identification device, characterized in that the output signal of the digital switching network is generated based on the signal having the periodicity. Receiving an output signal of a digital switching network;
measuring phase jitter in the signal;
storing the measured value and occurrence time of the phase jitter;
determining a location where the phase jitter occurs; and
displaying a result of determining a location of occurrence of the phase jitter;
Including,
The determining step is
If the measured value is above the threshold, the periodic characteristics of the phase jitter are analyzed based on the occurrence time of the phase jitter that occurred within a preset time,
If the phase jitter has periodic characteristics, it is determined that the phase jitter occurs in a digital switching network,
A jitter generation location identification method, characterized in that it is determined that the phase jitter occurs in a communication line when the phase jitter does not have periodic characteristics. In claim 8,
The saving step is
A method for identifying a jitter occurrence location, characterized in that if the measured value in the measuring step is greater than or equal to a threshold, the occurrence time of the phase jitter is stored. delete In claim 8,
The determining step is
analyzing periodic characteristics of the phase jitter based on the stored occurrence time of the phase jitter; and
A jitter generation location identification method comprising the step of determining the location of the phase jitter based on whether the phase jitter has periodic characteristics. delete In claim 8,
The steps indicated above are
A jitter occurrence location identification method characterized by displaying the average value of phase jitter during the preset period based on an interrupt occurring at a preset period. In claim 8,
A jitter generation location identification method, characterized in that the output signal of the digital switching network is generated based on a signal with periodicity.

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