KR20090032572A - Real-time monictoring apparatus and method for obstacle in optical cable - Google Patents

Abstract

An apparatus for monitoring an obstacle in an optical cable in real time and a method thereof are provided to sense a transceiving level of the optical cable in real time through N*N optical switches and measure properties of the optical cable such as obstacle. An apparatus for monitoring an obstacle in an optical cable in real time comprises N*N optical switches(30,40), an OTDR(Optical Time Domain Reflectometer) module(70), a CPU module(80), a monitoring server(90) and an operation client(120). The N*N optical switches accommodate the optical cable inserted into OFDs(Optical Fiber Distributor)(50,60) into an in and out terminal. And the N*N optical switches perform automatic and manual switching commands through a user interface by detecting a transceiving light level state of the accommodated optical cable. The OTDR module performs automatic or manual measurement according to a period of the optical cable in real time so that automatic or manual measurement according to a loss value of a line(35) and a measurement distance is performed in real time.

Description

Real-time Monictoring Apparatus and Method for Obstacle in Optical Cable}

The present invention relates to a real-time optical cable failure device and method, and more particularly, to monitor the transmission and reception level of the optical cable in real time, and to measure the characteristics of the optical cable automatically and fault-linked, and to measure the optical cable after an unswitched transfer of the optical cable in use The present invention relates to a real-time optical cable failure device and method for preventing the short-term failure in advance after identifying the signs of failure in advance.

In recent years, the frequency of failure of optical cables due to various natural disasters and artificial accidents is gradually increasing, and the characteristics of optical cables are deteriorated and attenuated due to the aging of existing optical cables. Management needs are increasing.

However, in the conventional optical cable monitoring method, an optical coupler, a filter, an optical circulator, and a sprinter can be directly inserted into an optical fiber inlet / outlet terminal to introduce an optical wavelength for measuring an optical cable and detect a fine signal level. It is a structure.

Therefore, the existing line has a problem that can cause a failure due to the addition of the connection point, there is a problem that the configuration of the device is complicated, and also has various problems such as adversely affect the optical properties of the optical cable.

An object of the present invention is to monitor the transmission and reception level of the optical cable in real time through the N * N optical switch and to measure the characteristics of the optical cable automatic and fault-linked.

Another object of the present invention is to measure the optical cable in use through the N * N optical switch after an uninterrupted transfer to determine the failure signs of the optical cable in advance to prevent the short-term failure.

The real-time optical cable failure monitoring apparatus according to the present invention accommodates the optical cable incoming from the optical fiber distribution panel according to the IN (IN) and OUT (OUT) terminal, detects the transmission and reception optical level of the received optical cable and connects to the user interface and automatically and An N * N optical switch for performing a manual transfer command; Perform automatic and manual measurement according to the cycle setting of the optical cable status in real time to perform automatic and manual measurement according to the loss value and measurement distance of the line in real time, and display and save the loss value and measurement distance of the line as a waveform An OTDR module; A CPU module for performing status and fault monitoring, telemetry and control commands of the optical cable; And a monitoring server and an operation client for determining a failure through the data transmission / reception with the N * N optical switch, the OTDR module, and a user interface, and analyzing a measurement waveform, and storing and managing data. It is done.

The real-time optical cable failure monitoring method according to the present invention comprises the steps of monitoring the transmission and reception level of the optical cable accommodated in the N * N optical switch in real time to issue an alarm when the set threshold value is exceeded; The optical transmission apparatus automatically measures the state of the received optical cable by using the OTDR module upon receiving a failure alert; When the result measured by the OTDR module is determined to be an abnormality such as disconnection of the optical cable system, performing a stepless transfer through the N * N optical switch; characterized in that it comprises a.

Preferably, the N * N optical switch performs a stepless changeover at a speed twice as fast as the disability time of the optical transmission device.

The present invention has the effect of monitoring the transmission and reception level of the optical cable in real time through the N * N optical switch, and the automatic and fault-linked measurement of the characteristics of the optical cable.

The present invention can be measured after the transfer of the optical cable in use through the N * N optical switch without any change in order to grasp the failure signs of the optical cable in advance, thereby preventing the single station failure in advance.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a real-time optical cable failure monitoring apparatus according to an embodiment of the present invention.

Referring to FIG. 1, an embodiment of the present invention accommodates an optical cable 35 introduced from an optical fiber distributor (OFD) 50 in accordance with IN and OUT terminals and accommodates the received optical cable. Intelligent N * N optical switch 30, 50 for detecting the transmit / receive optical level of the optical fiber and performing the automatic and manual switching command by connecting to the user interface, and automatically and manually measuring the state of the optical cable 35 according to the cycle setting. OTDR (Optical Time Domain Reflectometer) module 70 for performing real time and automatic and manual measurement according to the line loss value and measurement distance in real time, and displaying and storing the wave loss value and measurement distance in waveform. Transmitting and receiving data with the CPU module 80 for performing status and fault monitoring, telemetry and control commands for the 35 and the optical switch 30 and 50, the OTDR module 70, and a user interface (GUI). And measure waveform minutes A failure determination with, and configured to include a monitoring server (90) and operating the client 120 to store and manage data.

More specifically, the optical cables 35 are formed in the first and second optical fiber distribution panels 50 and 60 in the first and second optical transmission devices 10 and 20 so that the first and second optical fiber distribution panels 50 ( 60 is connected to the first and second optical transmission apparatuses 10 and 20 by an optical jumper cord.

First and second N * N optical switches 30 and 40 are disposed midway between the first and second optical transmission apparatuses 10 and 20 and the first and second optical fiber distribution panels 50 and 60.

The first and second N * N optical switches 30 and 40 are connected to the monitoring server 90, and the monitoring server 90 is connected to the optical end station 100.

The monitoring server 90 is connected to the operating client server 120 and the LAN (LAN) (110).

In addition, the first optical switch 30 is connected to the CPU module 80, the CPU module 80 is connected to the monitoring server 90, between the CPU module 80 and the first optical switch 30 In the OTDR module 70 is installed.

The OTDP module 70 enters light into the optical fiber and analyzes the signal shape in which the reflected light and the scattered light of the light pulse are returned in the time domain. That is, the backscatter or reflected light generated in the optical fiber is returned to the time difference with respect to the length of the optical fiber from the incident point to the measured point, thereby identifying the fault position of the optical cable.

The failure monitoring operation of the optical cable by the real-time optical cable failure monitoring apparatus according to the present invention configured as described above is as follows.

2 is a flowchart of a real-time optical cable failure monitoring method according to an embodiment of the present invention.

1 and 2, the first, second, and N * N optical switches 30 are provided between the first and second optical transmission apparatuses 10 and 20 and the first and second optical fiber distribution panels 50 and 60. Since the 40 is provided, the transmission and reception level of the optical cable 35 is automatically detected in real time by the first and second optical switches 30 and 40. (S10)

Data detected by the first and second optical switches 30 and 40 is transmitted to the monitoring server 90, and displays the state of the optical cable through a graphic screen through a graphical user interface (GUI) of the monitoring server 90. Done. At this time, the input / output terminal level and the connection loss of the optical cable 35 are displayed in real time.

In addition, the monitoring server 90 sets the initial measured value as a threshold as a reference value (S12), compares the optical level of the detected optical cable with a threshold value (S13), and when the optical level of the optical cable is out of the threshold, a visible audible alarm Will be generated (S14). Therefore, the operator can detect and take measures of the failure of the optical cable in advance.

The monitoring server 9 organizes and stores the input data. (S15)

The optical transmission device 10, 20, which generates an alarm upon receiving a failure alarm, automatically measures the state of the received optical cable using the OTDR module 70, and the result measured by the OTDR module 70 is monitored. The operator is notified via). Therefore, when the result of the notification is determined to be an abnormality such as disconnection of the optical cable system, the N * N optical switch 30, 40 performs an uninterrupted switchover so that the high-speed optical communication network operates stably without disturbances such as the sundan.

Referring to FIG. 2, the state of the optical transmission apparatus used is checked (S21), and the target optical core for switching is set (S22) and the switching of the N * N optical switches is changed (S23). The switched optical cores are measured by the OTDR module 70 (S24), and the monitoring server 90 instructs the N * N optical switches 30 and 40 to perform original restoration (S25).

The measurement result data thus processed is received and analyzed through the CPU module 80. (S26)

The first and second N * N optical switches 30 and 40 basically implement automatic, manual and fault interlock measurement of optical fiber characteristics of the received optical cable 35 as well as the characteristics of the optical cable in use. By providing a solution that can be measured, the unused cores accommodated in the N * N optical switches 30 and 40 are monitored through the monitoring server 90 without fear of deterioration or deterioration of the optical cores in use. The transfer command is executed using the IP network. That is, after the first and second optical transmission devices 19, 20, and at the same time without a random transfer to measure the characteristics of the optical cable 35 through the monitoring server 90, the CPU module 80 and the OTDR module 70 And restore it back to its original state.

Since the N * N optical switch 30 and 40 has a transfer time within 25 ms, the N * N optical switch 30 and 40 exhibit a speed characteristic that is about twice as fast as the disability time of the first and second optical transmission apparatuses 10 and 20. To perform an unscheduled transfer.

The embodiment of the present invention as described above is an optical core accommodated in real time by incorporating N * N intelligent optical switch technology with the time domain reflected light measuring device (OTDR) technology to secure the integrity of the optical cable that forms the basis of Korea's high-speed information communication network It monitors the optical transmit / receive level and detects abnormality by measuring automatic or fault connection of the used and unused optical cable according to the operation server's program. In addition, in case of an abnormality such as a failure, it is possible to implement a GUI interface function through remote alarm generation and message transmission through SMS interworking, database of fault information, and GIS linkage.

1 is a block diagram of a real-time optical cable failure monitoring apparatus according to the present invention.

2 is a flowchart of a real-time optical cable failure monitoring method according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10,20; First and second optical transmission device

30,40; First and second optical switch

35; Optical cable

50,60; 1st and 2nd Ray Distribution Panel

70; OTDR module

80; CPU module

90; Surveillance server

100; Guangdangu

110; LAN

120; Operating client

Claims (3)

N * N optical that accepts the incoming optical cable from the optical fiber distribution panel to the IN and OUT terminals, detects the transmit and receive optical level of the received optical cable, and connects with the user interface to perform automatic and manual transfer commands. A switch; Perform automatic and manual measurement according to the cycle setting of the optical cable status in real time to perform automatic and manual measurement according to the loss value and measurement distance of the line in real time, and display and save the loss value and measurement distance of the line as a waveform An OTDR module; A CPU module for performing status and fault monitoring, telemetry and control commands of the optical cable; Real-time optical cable failure, characterized in that configured; including; monitoring server and operating client to determine the failure through the data transmission and reception and measurement waveform analysis with the N * N optical switch, the OTDR module and the user interface monitor. Monitoring the transmission / reception level of the optical cable accommodated in the N * N optical switch in real time and issuing an alarm when the set threshold value is exceeded; The optical transmission apparatus automatically measures the state of the received optical cable by using the OTDR module upon receiving a failure alert; Real-time optical cable failure monitoring method comprising the step of performing a non-switching through the N * N optical switch when the result measured by the OTDR module is determined to be abnormal such as disconnection of the optical cable system. The method of claim 2, The N * N optical switch is a real-time optical cable failure monitoring method characterized in that to perform an uninterrupted transfer at a speed twice as fast as the impaired time of the optical transmission device.

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