CN109379131A - Highly reliable optical fiber telecommunications system optical link on-Line Monitor Device and fault detection method - Google Patents
Highly reliable optical fiber telecommunications system optical link on-Line Monitor Device and fault detection method Download PDFInfo
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- CN109379131A CN109379131A CN201811471424.0A CN201811471424A CN109379131A CN 109379131 A CN109379131 A CN 109379131A CN 201811471424 A CN201811471424 A CN 201811471424A CN 109379131 A CN109379131 A CN 109379131A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 418
- 238000001514 detection method Methods 0.000 title claims abstract description 85
- 239000013307 optical fiber Substances 0.000 title claims abstract description 26
- 238000012544 monitoring process Methods 0.000 claims abstract description 49
- 238000012545 processing Methods 0.000 claims abstract description 48
- 238000012360 testing method Methods 0.000 claims abstract description 22
- 238000004891 communication Methods 0.000 claims description 43
- 230000005540 biological transmission Effects 0.000 claims description 31
- 238000012806 monitoring device Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 abstract description 6
- 238000005070 sampling Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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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
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07955—Monitoring or measuring power
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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
- H04B10/0799—Monitoring line transmitter or line receiver equipment
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- Computer Networks & Wireless Communication (AREA)
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Abstract
There is provided a kind of highly reliable optical fiber telecommunications system optical link on-Line Monitor Device, in which: optical link monitoring processing unit reads transmitting optical power by optical transmitter read-write register and interface and self-test light detection pipe is made to work；Optical link monitors processing unit and reads received optical power by optical receiver read-write register and interface；First switch is used to be selected the arrival purpose of the optical signal of local optical transmitter output by optical link monitoring processing unit control；And second switch is used to control the optical signal source inputted to local optical receiver from optical link monitoring processing unit.Also provide a kind of corresponding fault detection method.Apparatus and method of the present invention has the characteristics that hardware is simple, small in size, test is quick, high-efficient.
Description
Technical Field
The invention belongs to the communication technology, and relates to an optical link on-line monitoring device and a fault detection method of a high-reliability optical fiber communication system.
Background
The optical fiber communication network is essentially used for transmitting optical signals on an optical cable medium and has the advantages of high transmission bandwidth, strong electromagnetic energy resistance, light weight and the like, so that the optical fiber communication network system is gradually developed from mature application in commercial and civil fields to application in high-reliability fields, such as embedded systems of aviation, aerospace, navigation, combat vehicles and the like. In a high-reliability environment, the probability of a physical layer optical link of an optical fiber communication network failing in a system is much higher than that of other circuits, so that it is a technical problem to improve the fault detection capability of the optical link, including accuracy, real-time performance, rapidness and the like. The traditional off-line detection is through the test of optical detection equipment, and the fault detection capability requirement of the high-reliability system optical link cannot be met.
Disclosure of Invention
Aiming at the requirements of multiple optical link faults and difficult detection and positioning of an optical fiber communication system in the high-reliability field, the invention designs an optical link online monitoring embedded device by combining the characteristics of the optical link of the high-reliability optical fiber communication system and the requirements of fault detection and positioning, provides an optical link online fault detection method formed by active and passive step-by-step testing, transmitter and receiver self-detection, passive link testing and the like, and solves the problem of difficult optical link fault detection in the high-reliability field. The scheme of the invention has the characteristics of simple hardware, small volume, quick test and high efficiency.
The technical scheme is as follows:
the high-reliability optical fiber communication system optical link on-line monitoring device achieves the aim, and comprises an optical link monitoring and processing unit, a self-checking optical detection tube, an optical transmitter read-write register and interface, an optical receiver read-write register and interface, a local optical transmitter, a local optical receiver, a first switch and a second switch; wherein: the optical link monitoring processing unit reads the transmitting optical power through the optical transmitter read-write register and the interface and enables the self-detection optical detection tube to work; the optical link monitoring processing unit reads the received optical power through the optical receiver read-write register and the interface; the first switch is used for selecting the destination of the optical signal output by the local optical transmitter under the control of the optical link monitoring processing unit; and the second switch is used for controlling the source of the optical signal input to the local optical receiver by the optical link monitoring processing unit.
In the above apparatus, the first switch may include a first position, a second position, and a third position; transmitting the optical signal to a remote optical receiver when the first switch is in a first position; when the first switch is positioned at a second position, the optical signal is wound back to the self-detection optical detection tube; when the first switch is in a third position, the optical signal is wrapped around to a local optical receiver.
In the above apparatus, the second switch may include a fourth position and a fifth position; inputting an optical signal emitted from a far-end optical transmitter when the second switch is located at a fourth position; when the second switch is in a fifth position, a wrapped optical signal transmitted from a local optical transmitter is input.
In addition, the above object is achieved by a method for detecting an online fault of an optical link of a highly reliable optical fiber communication system according to the present invention, which is characterized by comprising: self-checking of a local optical transmitter, self-checking of a local optical receiver, passive optical transmission link detection and passive optical receiving link detection; in the self-test of the local optical transmitter, the local optical link monitoring processing unit enables a self-test optical detection tube to sample the optical power emitted by the local optical transmitter and judges whether the emitted optical power is in a preset interval or not; in the self-test of the local optical receiver, the local optical link monitoring processing unit enables the local optical receiver to sample the optical power emitted by the local optical transmitter and judges whether the received optical power is in a preset interval or not; in passive optical transmission link detection, when a local optical transmitter and a remote optical receiver both perform self-checking normally, the remote optical receiver receives emitted optical power from the local optical transmitter, and a remote optical link monitoring processing unit calculates passive optical transmission link power loss according to the difference between preset emitted optical power and received emitted optical power and judges whether the passive optical transmission link power loss is within a preset interval; in the passive optical receiving link detection, when the local optical receiver and the far-end optical transmitter both perform self-checking normally, the local optical receiver receives the transmitting optical power from the far-end optical transmitter, and the local optical link monitoring processing unit calculates the passive optical receiving link power loss according to the difference between the preset transmitting optical power and the receiving transmitting optical power, and judges whether the passive optical receiving link power loss is within a preset interval.
As described above, the on-line monitoring device and the fault detection method for the optical link of the high-reliability optical fiber communication system of the present invention include the following aspects:
the high-reliability optical fiber communication system optical link is composed of optical transmitter, optical receiver, passive optical transmitting link and optical receiving link. The passive optical transmission link and the passive optical reception link are constituted by passive optical transmission components, and the passive optical transmission components are constituted by optical connectors from the module to the backplane, chassis optical connectors, transmission cables, and the like. In the fault test, the passive optical transmission link and the passive optical reception link are treated as a whole respectively.
In order to complete the on-line fault location detection of the optical transmitter and the receiver, the on-line monitoring device of the optical link of the high-reliability optical fiber communication system comprises:
1) the optical link monitoring processing unit can read the light emission power through the optical transmitter read-write register and the interface so as to enable the self-detection light detection tube to work;
2) the optical link monitoring and processing unit can read the received optical power through the optical receiver reading register and the interface;
3) the optical transmitter outputs a selected one-out-of-three switch, and the optical link monitoring processing unit controls a target component to which the optical signal output by the optical transmitter can be transmitted by the selected one-out-of-three switch: a first target component that is transmitted onto an external optical cable connected to a remote optical receiver (supporting a normal communication mode); a second target component, which is wrapped around to the local self-detection light detection tube (supporting the local light transmitter self-detection mode); a third target component wrapping around to the input of the local optical receiver (supporting the local optical receiver self-detection mode);
4) the optical receiver inputs a selected one-out switch, and the optical link monitoring processing unit can control the source of the optical signal input by the optical receiver through the one-out switch: a first source of optical signals transmitted from a far-end optical transmitter on an external optical cable (supporting a normal communication mode); and a second source of a wrapped-around optical signal transmitted from a local optical transmitter (supporting a local optical receiver self-detection mode).
The online fault detection method of the optical link of the optical fiber communication network comprises the following steps:
the on-line fault location detection of the optical link of the optical fiber communication network comprises four steps: first, self-checking of the optical transmitter; secondly, self-checking of the optical receiver; third, passive optical transmission link detection; fourthly, detecting a passive optical receiving link;
(1) self-test of the optical transmitter: the optical link monitoring processing unit enables the self-detection optical detection tube to sample the optical power emitted by the local optical transmitter, converts a three-out-of-one switch selected by the output of the optical transmitter from a normal communication mode to a local transmitter self-detection mode, the optical transmitter transmits a preset message stream, reads the emitted optical power, compares the emitted optical power with an expected range value, judges that the local optical transmitter is normal if the emitted optical power is within the range, and judges that the optical transmitter is in fault if the emitted optical power is not within the range;
(2) self-test of the optical receiver: the optical link monitoring processing unit forbids a self-detection optical detection tube to sample the optical power emitted by the local optical transmitter, converts a one-out-of-three switch selected by the output of the optical transmitter from a normal communication mode to a local optical receiver self-detection mode, and converts a one-out-of-two switch selected by the input of the optical receiver from the normal communication mode to the local optical receiver mode; the optical transmitter transmitting a predetermined message stream; the optical link monitoring processing unit reads the received optical power, compares the received optical power with an expected range value, judges that the local optical receiver is normal if the received optical power is within the range, and judges that the optical receiver is in failure if the received optical power is not within the range;
(3) passive optical transmission link detection: the passive optical transmission link is a passive optical link connected between a local node optical transmitter and a remote node optical receiver, when the local optical transmitter and the remote optical receiver both perform self-detection under a normal condition, the local optical link monitoring processing unit prohibits a self-detection optical detection tube from sampling optical power emitted by the local optical transmitter, sets a selected one-out-of-three switch output by the optical transmitter to a normal communication mode, and sets a selected one-out-of-two switch input by the optical receiver to a normal communication mode; the operation of the remote optical link monitoring processing unit is the same as the above; the method comprises the steps that a local optical transmitter transmits a preset message stream, a remote optical receiver receives the message stream, a remote optical link monitoring processing unit reads received optical power, the received optical power is compared with an expected range value considering the power loss of a passive optical transmission link, if the received optical power is within the range, the passive optical transmission link is judged to be normal, and if the received optical power is not within the range, the passive optical transmission link is judged to be in fault;
(4) passive optical receiving link detection: the passive optical receiving link is a passive optical link connected between a local node optical receiver and a remote node optical transmitter, when the local optical receiver and the remote optical transmitter both perform self-checking under a normal condition, the local optical link monitoring processing unit prohibits a self-checking optical detection tube from sampling the optical power emitted by the local optical transmitter, sets a selected one-out-of-three switch output by the optical transmitter to a normal communication mode, and sets a selected one-out-of-two switch input by the optical receiver to a normal communication mode; the operation of the remote optical link monitoring processing unit is the same as the above; the remote optical transmitter sends a preset message stream, the local optical receiver receives the information stream, the local optical link monitoring processing unit reads the receiving optical power, the receiving optical power is compared with an expected range value considering the power loss of the passive optical receiving link, if the receiving optical power is within the range, the passive optical receiving link is judged to be normal, and if the receiving optical power is not within the range, the passive optical receiving link is judged to be in fault.
The invention has the beneficial effects that:
according to the characteristics of an optical link of a high-reliability optical fiber communication system and the requirement for fault detection and positioning, an optical link online monitoring embedded device is designed, an optical link online fault detection method formed by active and passive step-by-step testing, transmitter and receiver self-detection testing, passive link testing and the like is provided, and the problem of difficulty in optical link fault detection in the high-reliability field is solved. Specifically, in the present application:
a) the implementation scheme of the optical link on-line monitoring device of the high-reliability optical fiber communication system is provided, and the optical link on-line monitoring device has the characteristics of simple hardware, small volume and low power consumption;
b) the method for detecting the online fault of the optical link of the high-reliability optical fiber communication system has the characteristics of quick and accurate test;
c) the device and the method have the characteristics of strong universality and easy realization for the embedded system.
The device and the method have the advantages of simple test hardware, small volume, quick test and high efficiency, and are suitable for being applied to a high-reliability embedded system.
Drawings
The invention will be described in detail with reference to the accompanying drawings, in which:
fig. 1 shows a schematic diagram of an optical link on-line monitoring device of a high-reliability optical fiber communication system.
Detailed Description
The present invention is described in further detail below with reference to fig. 1.
The high-reliability optical fiber communication system optical link is composed of optical transmitter, optical receiver, passive optical transmitting link and optical receiving link. The passive optical transmission link and the passive optical reception link are constituted by passive optical transmission components, and the passive optical transmission components are constituted by optical connectors from the module to the backplane, chassis optical connectors, transmission cables, and the like. In the fault test, the passive optical transmission link and the passive optical reception link are treated as a whole respectively.
In order to complete the on-line fault location detection of the optical transmitter and the receiver, the on-line monitoring device of the optical link of the high-reliability optical fiber communication system comprises:
1) the optical transmitter reads and writes register and interface, it is used for monitoring the processing unit and reading the light emission power of the optical link, enable the work of the self-checking light detection tube;
2) an optical receiver reading register and interface, which is used for the optical link monitoring processing unit to be able to read the received optical power;
3) the optical transmitter outputs a selected one-out-of-three switch (first switch), and the optical link monitoring processing unit selects a target component to which the optical transmitter outputs the optical signal by controlling the one-out-of-three switch: a first target component (corresponding to position 1 in fig. 1) that is transmitted onto an external optical cable connected to a remote optical receiver (supporting a normal communication mode); a second target component (corresponding to position 2 in fig. 1) wrapping around to the local self-detection pipe (supporting local optical transmitter self-detection mode); a third target component (corresponding to position 3 in fig. 1) wrapping around to the input of the local optical receiver (supporting the local optical receiver self-detection mode);
4) the optical receiver inputs a selected one-out-of-two switch (second switch), and the optical link monitoring processing unit controls the source of the optical signal input by the optical receiver through the one-out-of-two switch: a first source (corresponding to position 4 in fig. 1) from an optical signal emitted by a far-end optical transmitter on an external optical cable (supporting a normal communication mode); a second source (corresponding to the figure) from the transmitted looped-back optical signal from the local optical transmitter (supporting the local optical receiver self-detection mode).
The online fault location detection method of the optical link of the optical fiber communication network comprises the following four steps: self-checking of the optical transmitter; self-checking of the optical receiver; passive optical transmission link detection; and detecting a passive optical receiving link.
The online fault detection method for the optical link of the optical fiber communication network comprises the following steps:
first step, self-checking of the optical transmitter: the optical link monitoring processing unit enables the self-detection optical detection tube to sample the optical power emitted by the local optical transmitter, converts the three-out-of-one switch selected by the output of the optical transmitter from a normal communication mode to a local transmitter self-detection mode, the optical transmitter transmits a preset message stream, reads the emitted optical power, compares the emitted optical power with an expected range value, judges that the local optical transmitter is normal if the emitted optical power is within the range, and shifts to a second step; otherwise, judging that the optical transmitter is in fault, and the optical transmitter needs to be replaced, repeating the self-checking, and switching to the second step after the self-checking is passed;
step two, self-checking of the optical receiver: the optical link monitoring processing unit forbids a self-detection optical detection tube to sample the optical power emitted by the local optical transmitter, converts a one-out-of-three switch selected by the output of the optical transmitter from a normal communication mode to a local optical receiver self-detection mode, and converts a one-out-of-two switch selected by the input of the optical receiver from the normal communication mode to the local optical receiver mode; the optical transmitter transmitting a predetermined message stream; the optical link monitoring processing unit reads the received optical power, compares the received optical power with an expected range value, judges that the local optical receiver is normal if the received optical power is within the range, and then turns to the third step; otherwise, judging that the optical receiver is in fault, and the optical receiver needs to be replaced, repeating the self-checking, and switching to the third step after the self-checking is passed;
step three, passive optical transmission link detection: the passive optical transmission link is a passive optical link connected between a local node optical transmitter and a remote node optical receiver, when the local optical transmitter and the remote optical receiver both perform self-detection under a normal condition, the local optical link monitoring processing unit prohibits a self-detection optical detection tube from sampling optical power emitted by the local optical transmitter, sets a selected one-out-of-three switch output by the optical transmitter to a normal communication mode, and sets a selected one-out-of-two switch input by the optical receiver to a normal communication mode; the operation of the remote optical link monitoring processing unit is the same as the above; the local optical transmitter transmits a preset message stream, the remote optical receiver receives the information stream, the remote optical link monitoring processing unit reads the receiving optical power, compares the receiving optical power with an expected range value considering the power loss of the passive optical transmission link, if the receiving optical power is in the range, judges that the passive optical transmission link is normal, and then the fourth step is carried out; otherwise, judging the passive optical transmission link to be in fault, repeating the self-checking, and turning to the fourth step after the self-checking is passed;
step four, passive optical receiving link detection: the passive optical receiving link is a passive optical link connected between a local node optical receiver and a remote node optical transmitter, when the local optical receiver and the remote optical transmitter both perform self-checking under a normal condition, the local optical link monitoring processing unit prohibits a self-checking optical detection tube from sampling the optical power emitted by the local optical transmitter, sets a selected one-out-of-three switch output by the optical transmitter to a normal communication mode, and sets a selected one-out-of-two switch input by the optical receiver to a normal communication mode; the operation of the remote optical link monitoring processing unit is the same as the above; the remote optical transmitter sends a preset message stream, the local optical receiver receives the information stream, the local optical link monitoring processing unit reads the receiving optical power, the receiving optical power is compared with an expected range value considering the power loss of the passive optical receiving link, if the receiving optical power is within the range, the passive optical receiving link is judged to be normal, and the test is finished; otherwise, judging the passive optical receiving link to be in fault, needing to replace the optical receiving link, repeating the self-checking, and finishing the test after the self-checking is passed.
Claims (4)
1. An optical link on-line monitoring device of a high-reliability optical fiber communication system comprises an optical link monitoring processing unit, a self-detection optical detection tube, an optical transmitter read-write register and interface, an optical receiver read-write register and interface, a local optical transmitter, a local optical receiver, a first switch and a second switch; wherein:
the optical link monitoring processing unit reads the transmitting optical power through the optical transmitter read-write register and the interface and enables the self-detection optical detection tube to work;
the optical link monitoring processing unit reads the received optical power through the optical receiver read-write register and the interface;
the first switch is used for selecting the destination of the optical signal output by the local optical transmitter under the control of the optical link monitoring processing unit; and is
The second switch is used for controlling the source of the optical signal input to the local optical receiver by the optical link monitoring processing unit.
2. The apparatus of claim 1, wherein the first switch comprises a first position, a second position, and a third position;
transmitting the optical signal to a remote optical receiver when the first switch is in a first position;
when the first switch is positioned at a second position, the optical signal is wound back to the self-detection optical detection tube;
when the first switch is in a third position, the optical signal is wrapped around to a local optical receiver.
3. The apparatus of claim 1, wherein the second switch comprises a fourth position and a fifth position;
inputting an optical signal emitted from a far-end optical transmitter when the second switch is located at a fourth position;
when the second switch is in a fifth position, a wrapped optical signal transmitted from a local optical transmitter is input.
4. An on-line fault detection method for an optical link of a high-reliability optical fiber communication system is characterized by comprising the following steps: self-checking of a local optical transmitter, self-checking of a local optical receiver, passive optical transmission link detection and passive optical receiving link detection; wherein,
in the self-checking of the local optical transmitter, the local optical link monitoring processing unit enables a self-checking optical detection tube to sample the optical power emitted by the local optical transmitter and judges whether the emitted optical power is in a preset interval or not;
in the self-test of the local optical receiver, the local optical link monitoring processing unit enables the local optical receiver to sample the optical power emitted by the local optical transmitter and judges whether the received optical power is in a preset interval or not;
in passive optical transmission link detection, when a local optical transmitter and a remote optical receiver both perform self-checking normally, the remote optical receiver receives emitted optical power from the local optical transmitter, and a remote optical link monitoring processing unit calculates passive optical transmission link power loss according to the difference between preset emitted optical power and received emitted optical power and judges whether the passive optical transmission link power loss is within a preset interval;
in the passive optical receiving link detection, when the local optical receiver and the far-end optical transmitter both perform self-checking normally, the local optical receiver receives the transmitting optical power from the far-end optical transmitter, and the local optical link monitoring processing unit calculates the passive optical receiving link power loss according to the difference between the preset transmitting optical power and the receiving transmitting optical power, and judges whether the passive optical receiving link power loss is within a preset interval.
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| CN114142934A (en) * | 2021-12-06 | 2022-03-04 | 中国工程物理研究院应用电子学研究所 | Multi-platform combined optical communication system and method |
| CN115065857A (en) * | 2022-08-17 | 2022-09-16 | 深圳市品为科技有限公司 | High-definition multimedia interface optical fiber transmission device |
| CN115276783A (en) * | 2022-07-04 | 2022-11-01 | 长芯盛（武汉）科技有限公司 | Front-transmission optical module WDM device and network management method thereof |
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| CN109379131B (en) | 2022-06-17 |
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