KR20170086235A - Optical line monitoring system - Google Patents

Optical line monitoring system Download PDF

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Publication number
KR20170086235A
KR20170086235A KR1020160005815A KR20160005815A KR20170086235A KR 20170086235 A KR20170086235 A KR 20170086235A KR 1020160005815 A KR1020160005815 A KR 1020160005815A KR 20160005815 A KR20160005815 A KR 20160005815A KR 20170086235 A KR20170086235 A KR 20170086235A
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KR
South Korea
Prior art keywords
optical
signal
light
branching
wavelength
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KR1020160005815A
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Korean (ko)
Inventor
조진기
송태진
Original Assignee
주식회사 오티콤
커미넷 주식회사
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Priority to KR1020160005815A priority Critical patent/KR20170086235A/en
Publication of KR20170086235A publication Critical patent/KR20170086235A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H04B10/0793—Network aspects, e.g. central monitoring of transmission parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H04B10/0795—Performance monitoring; Measurement of transmission parameters
    • H04B10/07955—Monitoring or measuring power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H04B10/0795—Performance monitoring; Measurement of transmission parameters
    • H04B10/07957—Monitoring or measuring wavelength

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

The present invention relates to an optical line monitoring system for monitoring the state of an optical line due to deterioration, disconnection or short-circuit. The optical line monitoring system includes a plurality of optical splitters (110-1, 110- 2, ..., 110-n) for detecting a characteristic value of light passing through a corresponding optical line from optical signals branched by corresponding optical splitters, (110-1, 110-2, ..., 110-n), and transmits the characteristic values of the light detected by the plurality of signal processing units (200) to the monitoring center (500) A hub 300 and a monitoring center 500 for receiving outputs from the hub 300. The monitoring center 500 monitors the status of the plurality of optical lines using the received characteristic values of the light do.

Description

OPTICAL LINE MONITORING SYSTEM [0002]

More particularly, the present invention relates to an optical line monitoring system for measuring the power and / or wavelength of an optical signal passing through an optical patch cord on an optical line and for remotely transmitting and managing the measured data .

Since the optical communication system was introduced, the optical line facility continues to expand, and most of the domestic telecommunication network is in charge. Also, the FTTH of the subscriber line for the smooth provision of broadband communication service is promoted and the FTTH of the communication network is accelerating Recently, there has been an increase in the number of apartments and buildings that introduce fiber to the home (FTTH), which is also called optical fiber in home or optical fiber in home.

Since the optical line is installed in a wide area and is exposed to the natural environment, deterioration due to environmental factors is likely to occur, and the possibility of disconnection or short-circuit of the optical cable due to external impact is also increasing. There is a problem that it can not only affect but also develop into a situation where communication is impossible, and that it takes a long time to recover from a failure.

In order to connect the optical cable and the optical cable, a connector for connecting the optical fiber (optical line) and the optical fiber of the optical cable is connected to both ends of the optical patch. An optical patchcord is used.

In addition, a fiber distribution frame (FDF) is used as a means for distributing optical signals to an assembly building such as an apartment or a building through an optical fiber cable for each generation. In this FDF, And distributes the incoming optical signal to each household.

Accordingly, in order to measure and monitor the power and / or the wavelength of the optical signal flowing through the optical line, the power and / or the power of the optical signal passing through the optical patch cord is measured using an optical patch cord in the FDF installed inside or outside the building, Or wavelengths of the optical line can be monitored by monitoring and managing the deterioration, disconnection, short-circuit, etc. of the optical line. There is a technology described in Patent Document 1 that performs such a function and a product thereof is disclosed in Non-Patent Document 1 have.

However, in Patent Documents 1 and 1, as shown in Fig. 1, optical signal data conversion and transmission means 11-1, 11-2, ..., 11-n, which are constitutions for measuring and monitoring optical power and wavelength, Is directly installed in the optical fiber (optical patch cord), there is a problem in that an optical communication function, which is a basic function of the optical fiber, also fails when an abnormality occurs in the configuration for measuring optical power and wavelength.

Patent Document 1 and Non-Patent Document 1 disclose that an optical power source for the operation of each optical patch cord is separately supplied from the outside to each of a plurality of optical patch cords provided in the FDF, There is a disadvantage in that power supply means such as power supply adapters for the number of power supply units must be installed in the FDF. In the case where a failure occurs in these power supply means, not only the optical power and / This problem is caused by the fact that the optical patch cord of the prior art is an integrated optical analysis function including an optical characteristic analysis function.

Patent Document 1: U.S. Patent No. 7,295,731 B2 (published on Nov. 13, 2007)

Non-Patent Document 1: SMART PATCHCORDSTM AND WIRELESS FIBERM FOR POWER AND WAVEJENGTH MONITERING (www.ozoptics.com)

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and it is an object of the present invention to provide an optical module capable of transmitting basic optical signals without supplying a separate external power source, measuring and monitoring the power and / or wavelength of an optical signal flowing through the optical line, Another object of the present invention is to provide an optical line monitoring system capable of continuing the transmission of an optical signal by an optical patch cord even when a failure occurs in an apparatus for measuring the power and / or wavelength of the optical signal.

According to an aspect of the present invention, there is provided an optical line monitoring system comprising: a plurality of optical branching means for branching light transmitted through a plurality of optical lines; A plurality of signal processing means for detecting characteristic values of light passing through the corresponding optical line from the optical signals branched by the corresponding optical branching means among the optical branching means of the plurality of signal processing means, And the monitoring center monitors the state of the plurality of optical lines using the received characteristic value of the light.

Preferably, each of the plurality of signal processing means includes photoelectric conversion means for converting an optical signal branched by the plurality of optical branching means into electric signals, and electric power conversion means for converting electric signals converted by the plurality of photoelectric conversion means into electric signals, Signal conversion means for converting a signal into an optical signal of an original size before the branch and for detecting a characteristic value of light of an optical signal transmitted through each of the plurality of optical lines from the optical signal, And signal analyzing means for analyzing the power of the optical signal transmitted through the optical line from the detected characteristic value of the light and transmitting the result of the power analysis to the monitoring center.

Preferably, the hub further includes a hub for transmitting a result of the power analysis output from the plurality of signal analysis means to the monitoring center in association with identification means for identifying the optical line corresponding to the result of the power analysis, respectively.

Preferably, a wavelength of light passing through the corresponding optical line is detected from an optical signal branched by the corresponding optical branching means among the plurality of optical branching means, corresponding to each of the plurality of optical branching means, And the monitoring center monitors the state of the plurality of optical lines by using one or both of the characteristic value of the received light and the wavelength of the light.

Preferably, each of the plurality of wavelength detecting means includes: an optical variable filter for passing light of a specific wavelength among lights respectively inputted from the plurality of optical branching means under the control of a filter control unit; And photoelectric conversion means for converting the light of the passed wavelength into electric signals respectively.

Preferably, the display device further includes a display device for displaying a power analysis result analyzed by the signal analysis means.

According to the optical line monitoring system of the present invention having the above-described configuration, it is possible to measure the optical characteristics such as the power of the optical signal transmitted through the optical line without interruption of the optical signal transmission, The transmission of the optical signal by the optical patch cord can be continued.

1 is a view showing a configuration of a conventional optical patch cord,
2 is a diagram showing a schematic configuration of an optical line monitoring system according to a preferred embodiment of the present invention,
3 is a view showing a detailed configuration of the photoelectric conversion and power detection unit of FIG. 2,
4 is a diagram showing a configuration of a photoelectric conversion portion according to a modified example of the present invention.

Hereinafter, an optical line monitoring system according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. 2 is a diagram showing a schematic configuration of an optical line monitoring system according to a preferred embodiment of the present invention.

2, the optical line monitoring system according to a preferred embodiment of the present invention includes a light branching unit 100, a signal processing unit 200, a hub 300 and a monitoring center 500, And the monitoring center 500 are connected to each other via the communication network 400 in a communicable state.

The optical branching section 100 is provided in a plurality of optical patch cords provided in, for example, an FDF, and is provided with a plurality of optical fibers for branching an optical signal passing through a plurality of optical patch cords, for example, to 99: 1 or 95: For example, a plurality of optical splitters 110-1, 110-2, ..., 110-n are arranged in a ratio of 99: 1 In the case of branching the optical signal, 99% of the optical signal passing through the optical patch cord is distributed to the customer or the like through the optical patch cord, and the branched 1% optical signal is output to the signal processing unit 200 described later.

However, the optical patch cord is merely an example, and the plurality of optical splitters 110-1, 110-2, ..., 110-n may be provided directly on optical lines such as optical cables or individual optical fibers.

The signal processing unit 200 converts an optical signal branched from the optical branching unit 100 into an electric signal and converts the converted electric signal into a signal of an original size before the branching so that the power of light passing through the optical patch cord And a wired / wireless signal conversion unit 230 for converting a signal related to the optical power detected by the photoelectric conversion and power detection unit 210 into a wired / wireless signal for wired or wireless transmission .

2, one signal processing unit 200 including the photoelectric conversion and power detection unit 210 and the wire / wireless signal conversion unit 230 is installed. However, in practice, the photoelectric conversion and power detection unit 210 and the wired / The signal processing unit 200 including the conversion unit 230 is required for the number of the optical branching units 110-1, 110-2, ..., 110-n of the optical branching unit 100. [ In other words, when the number of the optical branching sections 110-1, 110-2, ..., 110-n of the optical branching section 100 is n, the photoelectric conversion and power detection section 210 and the wired / wireless signal conversion section The number of the signal processing units 200 including the signal processing units 230 is also n. The number of the wired / wireless signal conversion units 230 to be described later is also equal to the number of the optical branching units 110-1, 110-2, ..., 110-n of the optical branching unit 100.

The signal processing unit 200 may be provided in, for example, an FDF provided with an optical patch cord, or may be provided in a place separate from the FDF.

3, the photoelectric conversion and power detection unit 210 includes a photoelectric conversion unit 211 and a signal conversion unit 212 (see FIG. 3) A signal analysis unit 213, and a memory 215. [

The photoelectric conversion unit 211 converts an optical signal branched by each of the optical branching devices 110-1, 110-2, ..., 110-n of the optical branching unit 100 into electric signals.

The signal conversion unit 212 converts the electric signal converted by the photoelectric conversion unit 211 into an electric signal of the original size before branching and detects the power of the optical signal transmitted from the electric signal to the actual optical line. That is, the signal conversion unit 212 branches the optical signals from the plurality of optical splitters 110-1, 110-2, ..., and 110-n of the optical branching unit 100, The signals converted into signals are converted inversely according to the branching ratios branched by the plurality of optical branching devices 110-1, 110-2, ..., 110-n of the optical branching section 100, And detects the magnitude of the optical signal passing through the code, more specifically, the optical power.

The signal analyzing unit 213 analyzes the power of the optical signal transmitted through the optical patch code from the characteristic value of the light detected by the signal converting unit 212 and outputs the result to the wired / wireless signal converting unit 230 To the hub 300, and stores the result in the memory 215 if necessary.

In analyzing the optical power by the signal analyzer 213, for example, a reference value, which is a value at which the power value of the measured optical signal does not affect the quality of the optical communication, is stored in advance in the memory 215, 213 are branched from the plurality of optical branching devices 110-1, 110-2, ..., 110-n of the optical branching section 100 and detected through the photoelectric conversion section 211 and the signal conversion section 212 When the characteristic value of the light is compared with the reference value stored in the memory 215 and the characteristic value of the light detected by the comparison result signal conversion unit 212 is smaller than the reference value stored in the memory 215, Assume that the power of the signal is low.

When the power analysis result of the optical signal is output to the hub 300, the signal analysis unit 213 determines whether the power analysis result of the output optical signal is an optical signal through which optical patch cord among the plurality of optical patch cords, The power analysis result of the optical signal output to the hub 300 is branched from any one of the plurality of optical components 110-1, 110-2, ..., 110-n of the optical branching section 100 It is preferable to output IP (Internet Protocol) of each of the plurality of optical branch units 110-1, 110-2, ..., 110-n together with a signal for identifying the result obtained from the optical signal.

When the power value of the detected optical signal is smaller than the reference value and there is a problem in the optical communication, the signal analyzer 213 can also generate and send out a warning signal for issuing a warning. If necessary, It may be stored in the memory 215 and used for field verification.

2, the wired / wireless signal conversion unit 230 converts the power analysis result of the optical signal, which is analyzed by the signal conversion unit 212 and output to the hub 300, into either a wired signal or a wireless signal The communication method between the signal processing unit 200 and the hub 300 is determined depending on whether the communication method between the signal processing unit 200 and the hub 300 is a wire method or a wireless method, The wired / wireless signal conversion unit 230 may be omitted.

The hub 300 receives a signal relating to the power analysis result of the optical signal received from the signal processing unit 200 and a signal relating to the result of power analysis of the optical signal to the plurality of optical splitters 110-1, 110-n, which is the result obtained from the optical signal branched from one of the optical branching devices, that is, the optical patch code among the plurality of optical patch cords, And transmits the power analysis result of the IP-specific optical signal to the monitoring center 500 via the communication network 400.

At this time, the power analysis result of the optical signal for each IP collected in the monitoring center 500 from the hub 300 via the communication network 400 may be either wire or radio.

The monitoring center 500 is for monitoring and controlling the optical line. For example, the monitoring center 500 can be located in a management room of an apartment or a building. The monitoring center 500 can analyze the power of the optical signal per IP received from the hub 300 through the communication network 400 The result is visually displayed using a display device not shown in the drawing, or audibly informed by using an audio output device such as a speaker or the like not shown in the figure, so that the deterioration of the optical fiber in the plurality of optical lines, Or the optical signal is not transmitted due to the disconnection or short circuit of the optical fiber, to the manager visually or audibly. If necessary, the optical path from the hub 300 The power analysis result of the received optical signal for each IP is stored in a storage device of a non-urban area so that it can be used for future management.

According to the optical line monitoring system of the present embodiment configured as described above, the power measurement of the optical signal transmitted through the optical patch cord can be performed by measuring the optical characteristics such as the power of the optical signal flowing through the optical line And even when a failure occurs in the device for measuring the power of the optical signal including the power source, the optical signal can be continuously transmitted by the optical patch cord.

In the above embodiment, the monitoring system for monitoring the optical line by measuring the optical power of the optical signal transmitted through each of the plurality of optical patch cords has been described. However, the present invention is limited to the optical line monitoring by measuring the optical power But the optical line may be monitored by measuring the wavelength of the optical signal transmitted through each of the plurality of optical patch cords.

An optical line monitoring system for monitoring an optical line by measuring the wavelength of an optical signal will be described. 4 is a diagram showing a configuration of a photoelectric conversion portion according to a modified example of the present invention.

The optical line monitoring system of the modified example is different from the optical line monitoring system of the embodiment in the structure of the photoelectric conversion unit and the other parts are the same as those of the optical line monitoring system of the embodiment, .

The photoelectric conversion unit 211-1 of the modified example includes an optical variable filter 211a, a photoelectric conversion unit 211b, and a filter control unit 211c.

The optical variable filter 211a is controlled by the filter control unit 211c from the corresponding optical branching unit among the plurality of optical branching units 110-1, 110-2, ..., 110-n of the optical branching unit 100 And filters the input optical signal.

More specifically, the filter control unit 211c controls the light passing through the optical variable filter 211a to pass light of a specific wavelength and to filter light of other wavelengths. To this end, the filter control unit 211c includes an optical variable filter The optical branching filter 211a is controlled so as to sequentially change the wavelength that can be passed by the optical branching device 211a, When the wavelength of the light input from the filter control unit 211c is the same as the wavelength designated by the filter control unit 211c, the optical variable filter 211a passes the light of the wavelength and outputs the light to the photoelectric conversion unit 211b.

The photoelectric conversion unit 211b converts an optical signal having a wavelength that is output from the optical variable filter 211a into an electrical signal. The signal converted into an electrical signal by the photoelectric conversion unit 211b is converted into an electric signal by the signal conversion unit 212 The signal is transmitted to the monitoring center 500 via the communication network 400 via the signal analyzer 213, the wired / wireless signal converter 230 and the hub 300. This modification is different from the embodiment in that the photoelectric conversion unit 211b converts the signal into an electric signal and outputs the electric signal to the signal conversion unit 212, the signal analysis unit 213, the wired / wireless signal conversion unit 230, and the hub 300 There is a difference in that a signal transmitted to the monitoring center 500 via the communication network 400 is not a signal related to optical power but a signal relating to the wavelength of light. In this modification, the wavelength of the optical signal is detected, The presence or absence of an abnormality of the optical line is monitored by checking whether the wavelength of the optical signal is within the normal value range.

The present invention is not limited to the above-described embodiment and modifications, and various changes and modifications are possible within the scope of the present invention.

The above embodiment and the modified examples may be performed separately or in combination.

100 optical branching section
200 signal processor
210 Photoelectric Conversion and Power Detector
211, and 211b,
211a optical variable filter
212 signal conversion unit
213 Signal Analysis Section
230 wired / wireless signal conversion unit
300 hub
500 Monitoring Center

Claims (6)

A plurality of optical branching means for respectively branching the light transmitted through the plurality of optical lines,
A plurality of signal processing means provided corresponding to each of the plurality of optical branching means and detecting a characteristic value of light passing through a corresponding optical line from optical signals branched by corresponding optical branching means of the plurality of optical branching means, and,
And a monitoring center for receiving characteristic values of light detected by the plurality of signal processing means,
Wherein the monitoring center monitors a state of the plurality of optical lines by using a characteristic value of the received light. The method according to claim 1,
Wherein each of the plurality of signal processing means comprises:
Photoelectric conversion means for converting the optical signals branched by the plurality of optical branching means into electrical signals,
A signal for converting the electrical signal converted by the plurality of photoelectric conversion means into an optical signal of the original size before the branching and for detecting a characteristic value of light of the optical signal transmitted through each of the plurality of optical lines, Conversion means,
And signal analyzing means for analyzing the power of the optical signal transmitted through the optical line from the characteristic value of the light detected by each of the plurality of signal converting means and transmitting the result of the power analysis to the monitoring center Optical line monitoring system. The method of claim 2,
Further comprising: a hub for transmitting a result of the power analysis output from the plurality of signal analysis means to the monitoring center in association with identification means for identifying an optical line corresponding to the result of the power analysis, respectively. The method according to any one of claims 1 to 3,
A wavelength of light passing through a corresponding optical line from an optical signal branched by a corresponding optical branching unit among the plurality of optical branching units is detected corresponding to each of the plurality of optical branching units and transmitted to the monitoring center Further comprising a plurality of wavelength detecting means,
Wherein the monitoring center monitors the state of the plurality of optical lines using one or both of the characteristic value of the received light and the wavelength of the light. The method of claim 4,
Wherein the plurality of wavelength detecting means comprises:
An optical variable filter for passing light of a specific wavelength among lights inputted from the plurality of optical branching means under the control of a filter control unit,
And photoelectric conversion means for converting light of a wavelength having passed through the plurality of optical variable filters into electric signals respectively. The method of claim 2,
And a display device for displaying a power analysis result analyzed by said signal analyzing means.
KR1020160005815A 2016-01-18 2016-01-18 Optical line monitoring system KR20170086235A (en)

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