KR20120110399A - Multi-core optical cable monitoring system of live line and method of monitering the same - Google Patents

Abstract

PURPOSE: A system for monitoring a multi-core optical cable operating line and a monitoring method for the same are provided to minimize a data loss in an operation network structure and to prevent causes of the performance degradation and malfunction of establishment equipment. CONSTITUTION: An optical switch for monitoring a multi-core optical cable operating line comprises an OTDT(Optical Time-Domain Reflectometer) and a multi-wavelength OTDR(1c). The OTDR monitors the existence of the abnormal operation of an optical line by measuring the intensity of reflection lights generated by monitoring lights in the optical line. The multi-wavelength OTDR computes location information by comparing and analyzing OTDR data with respect to operation frequency lights and monitoring frequency lights of the optical line.

Description

Multi-Core Optical Cable Monitoring System of live line and method of monitering the same}

The present invention relates to a multi-core optical network line monitoring system and a method thereof, and more particularly, using an optical time domain reflectometer (OTDR), an optical switch, a plurality of light sources and a wavelength division multiplexer (WDM device). It relates to an operating track monitoring system and method.

Recently, due to the development of optical communication technology, optical-based network technology has been widely established throughout the industry. Therefore, a monitoring system for determining the occurrence of anomalies and faults of a light line is becoming important in terms of speedy recovery and maintenance of the line.

 In general, the optical fiber monitoring system using OTDR is a system for monitoring single-mode optical cable, which is a medium and long distance communication section, in Km units.

 The first method uses a splitter to distribute the light intensity to the communication operation line and monitor it through OTDR. to be.

 This means that in the case of monitoring the system by dividing the light intensity in the optical path by using the splitter, even if the light intensity of the monitored branch is weak, it causes loss in data transmission of the operation line. There is a problem that may cause an obstacle. In addition, when monitoring only a line (Dark-Line) not used in one cable line having a multi-core operation line, there is a problem that accurate failure determination or location information for the operation line can be distorted.

The problem to be solved by the present invention is to construct an OTDR system having a communication operation wavelength and a monitoring wavelength in the facility equipment and optical path monitoring system constituting the optical network, and compare the OTDR system data for the operating wavelength and the OTDR system data with the monitoring wavelength By analyzing, it is to provide the optical switch for obtaining the location information on the equipment and accurately determine the location of the abnormality on the track based on the location information.

Another problem to be solved by the present invention is to use a WDM (Wavelenght Division Multiplexer) element in the supervisory wavelength and the operating wavelength line to minimize communication data loss on the operating optical fiber and to form an optical network network due to the reflected wave in the OTDR supervisory wavelength light. The purpose is to prevent photo diode (PD) performance degradation and obstacles in the facility equipment receiver.

The optical switch of the present invention for solving the above problems is to measure the intensity of the reflected light and scattered light generated by the monitoring light in the optical path to monitor the abnormality of the optical path and OTDR for operating wavelength light and monitoring wavelength light in the optical path The multi-wavelength OTDR optical line monitoring system and multi-core optical cable operation line are monitored to compare and analyze the data to calculate the location information.

The monitoring method of the present invention for solving the other problem is to install the optical wave operating wavelength light and the monitoring wavelength light in the optical path and the equipment at the traveling position or the reverse direction using a wavelength division multiplexer (WDM device) The system monitors the optical path by branching / combining the light back to the OTDR system.

According to the multi-core optical cable operation line monitoring system and monitoring method of the present invention, multi-core optical cable operation line monitoring in the optical network network according to the system structure design using OTDR, optical switch, WDM to minimize data loss in the operation network structure and facility equipment The effect of preventing performance degradation and obstacles can be obtained.

In addition, the OTDR having a plurality of wavelengths compares the line position data of the operating wavelength with the data of the real-time monitoring wavelength light, thereby obtaining more accurate light beam position information.

1 is a view showing the configuration of an embodiment of an optical cable management line monitoring system according to the present invention.
FIG. 2 is a diagram illustrating a structure in which an optical cable is connected to a single core in the embodiment of FIG. 1.
3 is a diagram illustrating a method of branching / combining the operating wavelength light and the monitoring wavelength light according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below can be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to enable those skilled in the art to more fully understand the present invention.

The embodiment of the optical cable management line monitoring system according to the present invention is the position data and real-time in the facility equipment (A, A ') constituting the optical network after entering the initial communication operating wavelength in the optical fiber in the environment constituting the optical cable network By entering the monitoring wavelength light which is configured to monitor the operation line, it compares and analyzes more accurate position in the light line and prevents the degradation of facility equipment and obstacles caused by the reflected wave according to the operation wavelength and the monitoring wavelength.

1 is a view showing the configuration of an embodiment of an optical cable management line monitoring system according to the present invention.

Light source facility equipment [1-a] which enters operating wavelength light into multi-core cable of optical network network, Fan-out [1-f] and facility equipment [1-f which distributes cable to multi-core at single core. Facility wavelengths [1-e], operating wavelength light incident at a], consists of optical fiber network or optical network network, and wavelength divider (WDM) for splitting / combining optical wavelengths into optical paths. It consists of an optical line multi-core cable [1-i], a multi-wavelength OTDR [1-c], and an optical switch [1-d] including an optical control module to selectively monitor the optical path on the multi-core cable.

FIG. 2 is a diagram illustrating an optical cable operating line [2-e] at a single point coming from an optical switch in a light source facility equipment [A] and an optical cable operating line monitoring system that inject operating wavelength light into an optical network multi-core cable in the embodiment of FIG. Is a diagram illustrating a structure connected via WDM [2-c] and fan-out [2-a].

FIG. 3 is a diagram illustrating a method of dividing / combining operating wavelength light and monitoring wavelength light in intermediate facility equipment [A '] constituting an optical network.

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, but many variations and modifications may be made without departing from the scope of the present invention. It is possible.

1-a; Light source equipment
1-c; Multiwavelength OTDR
1-d; Optical switch
1-e; Optical network equipment
1-f; Fanout
1-h; Wavelength divider
1-i; Multi-core cable
2-e; Optical network operation track

Claims (2)

OTDR for monitoring the abnormality of the optical path by measuring the intensity of the reflected light and scattered light generated by the monitoring light in the optical path; And
An optical switch for monitoring a multi-wavelength OTDR optical line monitoring system and a multi-core optical cable operating line that compares and analyzes the OTDR data of the operating wavelength light and the monitoring wavelength light on the optical line to calculate position information. Branching / combining the light returned from the optical path and the equipment at the propagation position or back to the equipment and OTDR system using a wavelength division multiplexer (WDM device) using a wavelength division multiplexer (WDM device). The optical path monitoring method characterized by the above.

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