CN111262623A - Optical fiber channel monitoring device and method - Google Patents
Optical fiber channel monitoring device and method Download PDFInfo
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- CN111262623A CN111262623A CN202010061696.4A CN202010061696A CN111262623A CN 111262623 A CN111262623 A CN 111262623A CN 202010061696 A CN202010061696 A CN 202010061696A CN 111262623 A CN111262623 A CN 111262623A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
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Abstract
The invention discloses a fiber channel monitoring device and a method, comprising the following steps: the optical power meter module is configured to perform optical power test on the optical fiber channel; an OTDR module configured to implement attenuation testing of a fiber channel; the electrically-controlled adjustable light attenuation module is configured to increase attenuation of the optical fiber channel; the optical fiber interface module is used for realizing butt joint with an external optical fiber interface; and the optical switch module is respectively connected with the optical power meter module, the OTDR module, the electric control adjustable light attenuation module and the optical fiber interface module, so that the connection and gating effects of the modules and the optical fiber channel are realized. The invention designs the optical fiber channel monitoring device according to the characteristics of the optical fiber channel and the operation and maintenance requirements, the device integrates the functions of monitoring and controlling the optical fiber channel, can realize the functions of switching the main and standby optical fiber channels of a communication link, testing the optical power of the optical fiber channel, testing time domain reflection, testing loopback, testing receiving and transmitting switching and the like, and can realize the on-line monitoring of a plurality of optical fiber channels by the same device.
Description
Technical Field
The invention relates to the technical field of optical fiber communication, in particular to an optical fiber channel monitoring device and method.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Optical fiber communication is a communication mode that laser is used as an information carrier and optical fiber is used as a transmission medium. The optical fiber communication technology has the advantages of large transmission capacity, high speed and strong anti-interference capability, and becomes one of the main pillars of the modern communication technology along with the continuous development of the optical fiber communication technology. It provides reliable and high-speed bandwidth for communication network, and becomes the most main transmission means of information network. While the optical fiber communication technology is developing at a high speed, people pay more and more attention to the stable and reliable transmission of information, once a backbone transmission network line is interrupted due to an unexpected fault, huge social influence and economic loss can be caused.
The method realizes the on-line monitoring and control of the optical fiber channel of the optical transmission system, and under the condition of the line fault of the optical fiber communication system, the method quickly completes the fault elimination and positioning of the transmission system, which is an important subject of the line fault processing of the optical transmission system.
At present, the field of fiber channel monitoring and control is mainly divided into an optical fiber automatic switching protection system (OLP) and a fiber channel monitoring system.
The optical fiber automatic switching protection system mainly realizes switching control of the main optical fiber channel and the standby optical fiber channel, and switches the link to the standby optical fiber channel when the communication optical link fails in the main optical fiber channel so as to guarantee normal operation of the link. The scheme generally comprises a 1+1 protection scheme and a 1:1 protection scheme.
The optical fiber channel monitoring system mainly realizes the on-line monitoring of information such as attenuation of the optical fiber channel. The method mainly comprises two monitoring schemes, namely a light source-optical power meter monitoring scheme and an OTDR monitoring scheme. The main principle of the light source-optical power meter monitoring scheme is that a light source is connected to one end of a monitored optical fiber channel, an optical power meter is connected to the other end of the monitored optical fiber channel, and the optical power meter monitors the optical fiber channel by monitoring the luminous intensity of the light source; the OTDR monitoring scheme is mainly based on the principle that the OTDR technique is used to monitor the length and loss of a backup optical fiber to determine the channel state of the tested optical fiber.
The inventor finds that the existing optical fiber channel monitoring and control are realized by single equipment, the monitoring and control of the optical fiber channel cannot be realized simultaneously, and particularly, the switching and troubleshooting positioning of the main and standby optical fiber channels cannot be quickly completed under the condition of a fault.
At present, no relevant device and method with fiber channel monitoring and control are available.
Disclosure of Invention
In order to solve the above problems, the present invention provides an optical fiber channel monitoring device and method, which can simultaneously implement on-line monitoring and control of an optical fiber channel of an optical transmission system, and can rapidly complete switching and troubleshooting and positioning of a main optical fiber channel and a standby optical fiber channel under the condition of a line fault of an optical fiber communication system while monitoring the monitored optical fiber channel in real time.
In some embodiments, the following technical scheme is adopted:
a fibre channel monitoring device comprising:
the optical power meter module is configured to perform optical power test on the optical fiber channel;
an OTDR module configured to implement attenuation testing of a fiber channel;
the electronic control adjustable light attenuation module is configured to increase attenuation of the optical fiber channel, especially increase attenuation of the optical fiber channel when a self-loop test of light receiving and transmitting is carried out, reduce light receiving power of the optical module and prevent the optical module from being damaged due to too high light receiving intensity of the optical module;
the optical fiber interface module is used for realizing butt joint with an external optical fiber interface;
and the optical switch module is respectively connected with the optical power meter module, the OTDR module, the electric control adjustable light attenuation module and the optical fiber interface module, so that the connection and gating effects of the modules and the optical fiber channel are realized.
In other embodiments, the following technical solutions are adopted:
an operating method of a fiber channel monitoring device comprises the following steps: the optical fiber channel monitoring device is respectively connected in series with two ends of the primary optical fiber channel and the standby optical fiber channel, and can realize the switching of the primary optical fiber channel and the standby optical fiber channel of the communication link, the transmitting and receiving optical power test of the optical fiber channel, the OTDR loss test, the loopback test and the transmitting and receiving switching test.
In particular, the amount of the solvent to be used,
when the optical fiber channel monitoring devices at two ends of the optical fiber channel receive the main/standby channel switching command, the optical fiber channel monitoring devices control the corresponding optical switch modules to switch the bridge channel of the optical fiber channel so as to realize the main/standby optical fiber channel switching;
when the fiber channel monitoring devices at two ends of the fiber channel receive the fiber channel attenuation test command, one end of the fiber channel monitoring device controls the corresponding optical switch module, the optical power meter module is in optical fiber bridge connection with the tested optical fiber, the other end of the fiber channel monitoring device controls the corresponding optical opening module, the OTDR module is in optical fiber bridge connection with the tested optical fiber, and at the moment, the OTDR mode is a light source mode; subtracting the receiving optical power of the optical power meter from the luminous optical power in the OTDR light source mode to finish the optical power test of the receiving and sending of the optical fiber channel;
when the optical fiber channel monitoring devices at two ends of the optical fiber channel receive the OTDR command, the optical fiber channel monitoring device at one end controls the corresponding optical switch module to bridge the tested optical fiber to the reserved empty optical fiber interface, and the optical fiber channel monitoring device at the other end controls the corresponding optical opening module to bridge the OTDR module to the tested optical fiber, wherein the OTDR module is in a measurement mode at the moment; measuring curve data of the optical fiber channel by the OTDR to finish the attenuation test of the optical fiber channel;
when the optical fiber channel device receives a loopback command, the electrically controlled adjustable optical attenuation module is controlled to adjust to a proper optical attenuation size, and meanwhile, the corresponding optical switch module is controlled to bridge the transceiving interface and is connected in series with the electrically controlled adjustable optical attenuation module to complete loopback testing.
Compared with the prior art, the invention has the beneficial effects that:
the invention designs the optical fiber channel monitoring device according to the characteristics of the optical fiber channel and the operation and maintenance requirements, the device integrates the functions of monitoring and controlling the optical fiber channel, and can realize the functions of switching the main and standby optical fiber channels of a communication link, testing the optical power of the optical fiber channel, testing time domain reflection, testing loopback, testing receiving and sending switching and the like by combining the optical fiber channel monitoring method, and the same device can realize the online monitoring of a plurality of optical fiber channels.
The hardware implementation scheme of the invention has the characteristics of simple hardware, mature technology and small volume power consumption, can be integrated with optical transmission equipment to be used as an optical transmission equipment board card, and is convenient for deployment, operation and maintenance.
Drawings
Fig. 1 is a schematic structural diagram of a fiber channel monitoring apparatus according to a first embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a bridging state of an optical switch in a normal operating state of an optical fiber channel according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a bridging state of an optical switch in an abnormal operating state of an optical fiber channel according to an embodiment of the present invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
Example one
In one or more embodiments, a fibre channel monitoring device is disclosed, with reference to fig. 1, comprising:
a fibre channel monitoring device comprising:
the optical power meter module is configured to perform optical power test on the optical fiber channel;
an OTDR module configured to implement attenuation testing of a fiber channel;
the electronic control adjustable light attenuation module is configured to increase attenuation of the optical fiber channel, especially increase attenuation of the optical fiber channel when a self-loop test of light receiving and transmitting is carried out, reduce light receiving power of the optical module and prevent the optical module from being damaged due to too high light receiving intensity of the optical module;
the optical fiber interface module is used for realizing butt joint with an external optical fiber interface;
and the optical switch module is respectively connected with the optical power meter module, the OTDR module, the electric control adjustable light attenuation module and the optical fiber interface module, so that the connection and gating effects of the modules and the optical fiber channel are realized.
In addition, the apparatus further comprises:
the power supply module is used for providing power supply voltage for the device;
a clock module for providing a clock signal to the device;
the communication module is used for realizing information interaction with the outside;
and the control module is used for realizing coordination control of the optical power meter module, the OTDR module, the electric control adjustable light attenuation module, the optical fiber interface module, the optical switch module, the power supply module, the clock module and the communication module.
The optical fiber channel monitoring devices are connected to two ends of the monitored optical fiber channel in series, one optical fiber channel monitoring device can be connected into a plurality of monitored optical fiber channels according to requirements, and the same device can realize online monitoring of the plurality of optical fiber channels.
In this embodiment, the optical fiber channel monitoring apparatus is integrated into an optical fiber channel monitoring board card of the optical transmission device. The optical fiber channel monitoring device is connected in series at two ends of the main optical fiber channel and the standby optical fiber channel, and can realize the switching of the main optical fiber channel and the standby optical fiber channel of the communication link, the transmitting and receiving optical power test of the optical fiber channel, the OTDR loss test, the loopback test and the transmitting and receiving switching test by matching the two end devices.
Specifically, referring to fig. 1, the present embodiment provides a specific internal structure design of an optical switch module, which is composed of three 2 × 2 optical switches, three 1 × 2 optical switches, and one 1 × 3 switch, and the optical path connection relationships between the optical switches and between other modules are as shown in fig. 1.
Taking node a as an example, the optical switches 11 and 12 realize the bridge switching between the main and standby optical fibers; 13 the optical switch mainly realizes the receiving and dispatching switching of the optical fiber channel; 14. 15, the optical switch and the electric control adjustable light attenuation realize the receiving and sending self-loop of the optical path; 16. the optical switch 17, the 18 suspended optical fibers (the tail sections of the optical fibers are subjected to leveling and smoothing treatment), the optical power meter module and the OTDR optical module mainly realize the test of a light source-optical power meter method and an OTDR method of an optical fiber channel.
The method for switching the main and standby optical fiber channels specifically comprises the following steps:
the optical path bridging state of each optical switch in the normal state is shown in fig. 2, the optical switches 11, 12, 13, 21, 22 and 23 are in the normal conducting bridging state, the optical switches 14, 15, 24 and 25 are in the normal running bridging state, and the node a and node B transmit-receive optical paths are bridged to the main optical fiber through the optical switches to form a complete optical fiber channel.
The optical path bridging state is as shown in fig. 3, the optical switches 11, 12, 21 and 22 are in a cross bridging state, 13, 14, 15, 23, 24 and 25 are in a normal operation bridging state, and the node a and the node B transmit-receive optical paths are connected to the spare optical fiber through the optical switches by the primary optical fiber bridge to form a complete optical fiber channel.
The method for testing the light receiving and emitting power of the optical fiber channel comprises the following steps:
as shown in fig. 2, the a-node optical switch 17 is bridged to the optical power meter module, the B-node optical switch 27 is bridged to the OTDR module, the B-node device controls the OTDR module to enter the light source mode, and the devices at the two ends of the AB node cooperate with the fixable period to measure the spare optical fiber channel 1 once by using the light source-optical power meter method, so as to monitor whether the spare optical fiber channel 1 is normal; similarly, the B node optical switch 27 is bridged to the optical power meter module, the a node optical switch 17 is bridged to the OTDR module, the a node device controls the OTDR module to enter the light source mode, and the AB node two-end devices cooperate with the fixable period to measure the spare optical fiber channel 2 once by using the light source-optical power meter method, so as to monitor whether the spare optical fiber channel 2 is normal. Therefore, in a normal operation state, the optical power meter module of the AB two-end node, the OTDR module and the optical switches 16, 17, 26 and 27 cooperate with each other to monitor the spare fiber channel.
The OTDR loss test method specifically comprises the following steps:
as shown in fig. 3, the optical switch 17 of the node a device is bridged to the OTDR module and controls the OTDR module to enter the measurement mode, the optical switch 17 of the node B device is bridged to the suspended optical fiber, the OTDR module of the node a performs OTDR test on the primary optical fiber 1, and the optical switch 16 performs switching to complete OTDR test on the primary optical fiber 2 in cooperation with the primary optical fiber 2; similarly, the two side switches are matched, so that the OTDR test can be performed on the primary optical fiber 1 and the primary optical fiber 2 from the node B side, and the fault point can be reliably determined.
The receiving and transmitting loopback test method specifically comprises the following steps:
when the node A or the node B needs to carry out the transmit-receive self-loop test on the optical module, the device controls the electric control adjustable light attenuation to reach a preset attenuation value, and the optical switches 14, 15 or 24, 25 are bridged to the electric control adjustable light attenuation to form a complete transmit-receive self-loop optical fiber channel so as to complete the transmit-receive self-loop.
The receiving and dispatching switching test method specifically comprises the following steps:
when the switching test of the receiving and transmitting optical fibers is needed, the AB node optical switches 13 and 23 enter a cross-bridge state from a normal through-bridge state, and the switching of the receiving and transmitting optical fibers is completed.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (10)
1. A fibre channel monitoring device comprising:
the optical power meter module is configured to perform optical power test on the optical fiber channel;
an OTDR module configured to implement attenuation testing of a fiber channel;
the electrically-controlled adjustable light attenuation module is configured to increase attenuation of the optical fiber channel;
the optical fiber interface module is used for realizing butt joint with an external optical fiber interface;
and the optical switch module is respectively connected with the optical power meter module, the OTDR module, the electric control adjustable light attenuation module and the optical fiber interface module, so that the connection and gating effects of the modules and the optical fiber channel are realized.
2. A fibre channel monitoring device as claimed in claim 1, further comprising:
the power supply module is used for providing power supply voltage for the device;
a clock module for providing a clock signal to the device;
the communication module is used for realizing information interaction with the outside;
and the control module is used for realizing coordination control of the optical power meter module, the OTDR module, the electric control adjustable light attenuation module, the optical fiber interface module, the optical switch module, the power supply module, the clock module and the communication module.
3. The fiber channel monitor of claim 1, wherein the fiber channel monitor is serially connected to both ends of the primary fiber channel and the backup fiber channel, respectively, so as to implement switching between the primary fiber channel and the backup fiber channel, optical power testing for transmitting and receiving of the fiber channel, OTDR loss testing, loopback testing, and switching between transmitting and receiving.
4. A fibre channel monitoring device according to claim 3 wherein the same fibre channel monitoring device can be connected to a plurality of fibre channels simultaneously.
5. The fiber channel monitoring device according to claim 3, wherein the fiber channel monitoring device implements switching between a primary fiber channel and a backup fiber channel of the communication link, and specifically comprises:
when the optical fiber channel monitoring devices at two ends of the optical fiber channel receive the main/standby channel switching command, the optical fiber channel monitoring devices control the corresponding optical switch modules to switch the bridge channel of the optical fiber channel, so that the main/standby optical fiber channel switching is realized.
6. The fiber channel monitoring device according to claim 3, wherein the fiber channel monitoring device implements a transmit-receive optical power test of the fiber channel, specifically:
when the fiber channel monitoring devices at two ends of the fiber channel receive the fiber channel attenuation test command, one end of the fiber channel monitoring device controls the corresponding optical switch module, the optical power meter module is in optical fiber bridge connection with the tested optical fiber, the other end of the fiber channel monitoring device controls the corresponding optical opening module, the OTDR module is in optical fiber bridge connection with the tested optical fiber, and at the moment, the OTDR mode is a light source mode; and subtracting the receiving optical power of the optical power meter from the emitting optical power in the OTDR light source mode to finish the optical power test of the receiving and sending of the optical fiber channel.
7. The fiber channel monitoring device according to claim 3, wherein the fiber channel monitoring device implements an OTDR loss test, specifically:
when the optical fiber channel monitoring devices at two ends of the optical fiber channel receive the OTDR command, the optical fiber channel monitoring device at one end controls the corresponding optical switch module to bridge the tested optical fiber to the reserved empty optical fiber interface, and the optical fiber channel monitoring device at the other end controls the corresponding optical opening module to bridge the OTDR module to the tested optical fiber, wherein the OTDR module is in a measurement mode at the moment; and measuring the curve data of the optical fiber channel by the OTDR to finish the attenuation test of the optical fiber channel.
8. The fiber channel monitoring device according to claim 3, wherein the fiber channel monitoring device implements a loopback test, specifically:
when the optical fiber channel device receives a loopback command, the electrically controlled adjustable optical attenuation module is controlled to adjust to a proper optical attenuation size, and meanwhile, the corresponding optical switch module is controlled to bridge the transceiving interface and is connected in series with the electrically controlled adjustable optical attenuation module to complete loopback testing.
9. An operating method of a fiber channel monitoring device, comprising: the optical fiber channel monitoring device is respectively connected in series with two ends of the primary optical fiber channel and the standby optical fiber channel, and can realize the switching of the primary optical fiber channel and the standby optical fiber channel of the communication link, the transmitting and receiving optical power test of the optical fiber channel, the OTDR loss test, the loopback test and the transmitting and receiving switching test.
10. The method of claim 9, further comprising:
when the optical fiber channel monitoring devices at two ends of the optical fiber channel receive the main/standby channel switching command, the optical fiber channel monitoring devices control the corresponding optical switch modules to switch the bridge channel of the optical fiber channel so as to realize the main/standby optical fiber channel switching;
when the fiber channel monitoring devices at two ends of the fiber channel receive the fiber channel attenuation test command, one end of the fiber channel monitoring device controls the corresponding optical switch module, the optical power meter module is in optical fiber bridge connection with the tested optical fiber, the other end of the fiber channel monitoring device controls the corresponding optical opening module, the OTDR module is in optical fiber bridge connection with the tested optical fiber, and at the moment, the OTDR mode is a light source mode; subtracting the receiving optical power of the optical power meter from the luminous optical power in the OTDR light source mode to finish the optical power test of the receiving and sending of the optical fiber channel;
when the optical fiber channel monitoring devices at two ends of the optical fiber channel receive the OTDR command, the optical fiber channel monitoring device at one end controls the corresponding optical switch module to bridge the tested optical fiber to the reserved empty optical fiber interface, and the optical fiber channel monitoring device at the other end controls the corresponding optical opening module to bridge the OTDR module to the tested optical fiber, wherein the OTDR module is in a measurement mode at the moment; measuring curve data of the optical fiber channel by the OTDR to finish the attenuation test of the optical fiber channel;
when the optical fiber channel device receives a loopback command, the electrically controlled adjustable optical attenuation module is controlled to adjust to a proper optical attenuation size, and meanwhile, the corresponding optical switch module is controlled to bridge the transceiving interface and is connected in series with the electrically controlled adjustable optical attenuation module to complete loopback testing.
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| CN113162683A (en) * | 2021-03-04 | 2021-07-23 | 中国航空工业集团公司西安航空计算技术研究所 | Airborne FC communication link fault detection method |
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