CN109617600B - Detection pulse waveform self-debugging system and method based on PON link fault recognition - Google Patents
Detection pulse waveform self-debugging system and method based on PON link fault recognition Download PDFInfo
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- CN109617600B CN109617600B CN201811620136.7A CN201811620136A CN109617600B CN 109617600 B CN109617600 B CN 109617600B CN 201811620136 A CN201811620136 A CN 201811620136A CN 109617600 B CN109617600 B CN 109617600B
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- H—ELECTRICITY
- 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
- H04B10/075—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
- H04B10/0791—Fault location on the transmission path
Abstract
The invention discloses a detection pulse waveform self-debugging system and method based on PON link fault identification. The system comprises a light source module, a light source driving module, a circulator, a two-dimensional coding module, a light receiving module, a data acquisition card and a PC. In the method, the retrieval waveform with the maximum difference with the reference signal under the condition of open circuit is searched as the optimal waveform on the basis of controlling the retrieval waveform by software, so that the misjudgment rate is reduced, and the method is suitable for the environmental change of the optical fiber link.
Description
Technical Field
The invention belongs to the technical field of optical fiber communication, and particularly relates to a detection pulse waveform self-debugging system and method based on PON link fault identification.
Background
With the rapid increase of the demand of people for high-speed networks, Passive Optical Networks (PON) have become the most mainstream broadband access method with their unique networking and broadband advantages. With the rapid increase of the number of network users and the continuous expansion of the scale of optical fiber links, the problems of management and fault detection of optical network links are increasingly highlighted. Most of the current detection systems are constructed by using high-precision OTDR (optical time Domain reflectometer) to realize preventive detection, but the system is high in cost and cannot dynamically monitor in real time.
In order to solve the problem of monitoring the fault of the optical fiber link of the passive optical network, a PON link fault monitoring and performance analysis technology based on two-dimensional optical coding is generated, and the technology utilizes optical retrieval pulses to analyze terminal reflection signals and monitor the link state in real time. However, in the current technology, only a fixed light source is used to generate a search pulse with a single waveform for detection.
Because the reflected monitoring pulse is related to the waveform of the search pulse, the search pulse with different waveforms causes unstable threshold algorithm due to factors such as signal broadening, and particularly under the condition that equidistant links or close distance links exist, system misjudgment is easily caused, so that a single optical wave is difficult to adapt to the actual environment where the widely distributed optical network is located, and a good effect cannot be obtained on the problem of user state judgment.
Disclosure of Invention
In order to solve the technical problems in the background art, the invention provides a detection pulse waveform self-debugging system and method based on PON link fault identification, which are suitable for the environmental change of an optical fiber link and reduce the misjudgment rate.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
the detection pulse waveform self-debugging system based on PON link fault recognition comprises a light source module, a light source driving module, a circulator, a two-dimensional coding module, a light receiving module, a data acquisition card and a PC (personal computer); the output end of the PC is connected with the input end of the light source driving module through the data acquisition card, the output end of the light source driving module is connected with the light source module, the multi-wavelength retrieval pulse signal emitted by the light source module is emitted from the port 1 of the circulator and is emitted from the port 2 of the circulator, the multi-wavelength retrieval pulse signal emitted from the circulator is input into the two-dimensional coding module, the two-dimensional coding module outputs a plurality of groups of user monitoring signals through wavelength combination, the user monitoring signals are reflected after reaching a user terminal, the reflected signals are emitted from the port 2 of the circulator and are emitted from the port 3 of the circulator, the reflected signals emitted from the circulator are subjected to photoelectric conversion through the light receiving module, and the converted electric signals are transmitted to the PC through the data acquisition card.
The detection pulse waveform self-debugging method based on the detection pulse waveform self-debugging system comprises the following steps:
(1) under the normal state of a link, the PC sends a waveform driving instruction to the light source driving module through the data acquisition card, and the light source driving module drives the light source module to emit a retrieval pulse signal with a preset waveform according to the received waveform driving instruction;
(2) the data acquisition card acquires the reflected signal acquired by the light receiving module in the normal state of the link and stores the reflected signal to a memory of the PC;
(3) the PC machine obtains a reference signal of a preset waveform by filtering a reflected signal under a normal state of a link;
(4) switching different preset waveforms, and repeating the steps (1) to (3) to obtain reference signals of all the preset waveforms;
(5) successively switching preset waveforms to obtain detection data of each channel and carrying out open circuit judgment; the disconnection determination method is as follows:
according to the encoding rule, the reflection signal of the search pulse signal containing a certain wavelength λ contains all the user terminal information, and the following formula is calculated according to the reflection signal:
in the above formula, Pi(t) represents the signal value of the reference signal at the wavelength λ at the time t, Pi' (T) denotes a signal value of a reflected signal of a wavelength λ at a time T, T denotes one period from a base point to the next base point, and i denotes a different preset waveform;
a threshold D is preset for each waveformi', if DiValue greater than threshold DiIf yes, judging to be open circuit;
(6) when the open circuit is judged, D corresponding to each waveform is obtainediValue, selected DiThe waveform with the maximum value is used as the optimal waveform;
(7) and performing routing inspection according to the selected optimal waveform.
Further, the preset waveform comprises a gaussian shape, a triangular shape, a rectangular shape, a primary step shape, a secondary step shape and a sinusoidal shape.
Further, in the step (1), the PC sends a group of protocol codes to the data acquisition card through serial communication, the protocol codes include waveform parameters, and the data acquisition card decodes and acquires the waveform driving instruction after detecting the stop bit data of the protocol codes.
Further, in step (5), if the open circuit condition still does not occur after all the waveforms are switched and inspected for a certain time, a certain link is manually disconnected, and the connection is performed at intervals of several seconds.
Adopt the beneficial effect that above-mentioned technical scheme brought:
the difficulty in the prior art is that the actual link is in different environments, the signal change is inevitably generated due to the influence of factors such as temperature, electromagnetic field and the like, and for judging the equidistant link fault, an accurate threshold value is difficult to find, so that the single retrieval pulse shape is difficult to adapt to the variable environment, the fault recognition degree is low, and the judgment effect is poor. The invention searches the retrieval waveform with the maximum difference with the reference signal under the condition of open circuit as the optimal waveform on the basis of software control retrieval waveform, thereby reducing the misjudgment rate and adapting to the environmental change of the optical fiber link.
The invention optimizes the probability of PON link fault monitoring misjudgment caused by environment change, and realizes the optimization of retrieval pulse and the waveform matching of the actual state of a user on the premise of not influencing the running speed of a computer because the actual operation amount is not improved.
The invention can realize different light-emitting modes of the light source controlled by the software platform by using the serial communication and latch technology. Because the change of the retrieval pulse does not require the speed, the control of the light source module can be realized only by one data communication port, and then the link is judged according to the reference data under different waveforms, thereby reducing the probability of misjudgment due to a single waveform.
Drawings
FIG. 1 is a block diagram of the system components of the present invention;
FIG. 2 is a flow chart of the method of the present invention.
Detailed Description
The technical scheme of the invention is explained in detail in the following with the accompanying drawings.
The invention provides a detection pulse waveform self-debugging system based on PON link fault recognition, which comprises a light source module, a light source driving module, a circulator, a two-dimensional coding module, a light receiving module, a data acquisition card and a PC (personal computer), as shown in figure 1. The output end of the PC is connected with the input end of the light source driving module through the data acquisition card, the output end of the light source driving module is connected with the light source module, the multi-wavelength retrieval pulse signal emitted by the light source module is emitted from the port 1 of the circulator and is emitted from the port 2 of the circulator, the multi-wavelength retrieval pulse signal emitted from the circulator is input into the two-dimensional coding module, the two-dimensional coding module outputs a plurality of groups of user monitoring signals through wavelength combination, the user monitoring signals are reflected after reaching a user terminal, the reflected signals are emitted from the port 2 of the circulator and are emitted from the port 3 of the circulator, the reflected signals emitted from the circulator are subjected to photoelectric conversion through the light receiving module, and the converted electric signals are transmitted to the PC through the data acquisition card.
Based on the system, the invention provides a detection pulse waveform self-debugging method based on PON link fault identification, as shown in FIG. 2, the steps are as follows:
step 1: and under the normal state of the link, the PC sends a waveform driving instruction to the light source driving module through the data acquisition card, and the light source driving module drives the light source module to emit a retrieval pulse signal with a preset waveform according to the received waveform driving instruction.
The preferred scheme for implementing step 1 is that the preset waveform comprises a gaussian shape, a triangular shape, a rectangular shape, a primary step shape, a secondary step shape and a sinusoidal shape. The PC sends a group of protocol codes to the data acquisition card through the serial communication I/O port, the protocol codes comprise waveform parameters, and the data acquisition card decodes and acquires a waveform driving instruction after detecting the stop bit data of the protocol codes. The protocol code format is shown in table 1.
TABLE 1
Step 2: the data acquisition card acquires the reflection signal acquired by the light receiving module in the normal state of the link and stores the reflection signal to the memory of the PC.
And step 3: the PC machine obtains a reference signal of a preset waveform by filtering the reflected signal under the normal state of the link.
And 4, step 4: and (4) switching different preset waveforms, and repeating the steps 1-3 to obtain reference signals of all the preset waveforms.
And 5: and switching preset waveforms one by one to obtain detection data of each channel and carrying out open circuit judgment.
The preferred scheme for implementing step 5 is that, since the signal reflected by the encoder back to the OLT does not pass through the optical fiber trunk link, the loss is very small, that is, the reflected wave is very large, and the signal can be positioned by the wave and used as the time domain base point. According to the encoding rule, the reflected signal containing the search pulse signal with a certain wavelength λ contains all the user terminal information, and the following formula is calculated:
in the above formula, Pi(t) represents the signal value of the reference signal at the wavelength λ at the time t, Pi' (T) denotes a signal value of the reflected signal at the wavelength λ at time T, T denotes one period from a base point to the next base point, and i denotes a different preset waveform. A threshold D is preset for each waveformi', if DiValue greater than threshold DiIf yes, the circuit is determined to be open.
If the open circuit condition still does not occur after all waveforms are switched and inspected for a certain time, a certain link can be manually disconnected, and the loop is connected back at intervals of seconds.
Step 6: when the open circuit is judged, D corresponding to each waveform is obtainediValue, selected DiThe waveform with the largest value is used as the optimal waveform. In the presence of equidistant links, this optimal waveform can be considered to be the waveform that causes the greatest amount of variation in the preset waveform for the circuit, causing the variationThe greater amount of differentiation may provide a more significant decision threshold for the next specific determination of a failed link.
And 7: and performing routing inspection according to the selected optimal waveform.
The embodiments are only for illustrating the technical idea of the present invention, and the technical idea of the present invention is not limited thereto, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the scope of the present invention.
Claims (4)
1. The detection pulse waveform self-debugging method is based on a detection pulse waveform self-debugging system, wherein the detection pulse waveform self-debugging system comprises a light source module, a light source driving module, a circulator, a two-dimensional coding module, a light receiving module, a data acquisition card and a PC (personal computer); the output end of the PC is connected with the input end of a light source driving module through a data acquisition card, the output end of the light source driving module is connected with the light source module, a multi-wavelength retrieval pulse signal emitted by the light source module is emitted from a port 1 of a circulator and is emitted from a port 2 of the circulator, the multi-wavelength retrieval pulse signal emitted from the circulator is input into a two-dimensional coding module, the two-dimensional coding module outputs a plurality of groups of user monitoring signals through wavelength combination, the user monitoring signals are reflected after reaching a user terminal, the reflected signals are emitted from the port 2 of the circulator and are emitted from a port 3 of the circulator, the reflected signals emitted from the circulator are subjected to photoelectric conversion through a light receiving module, and the converted electric signals are transmitted to the PC through the data acquisition card;
the method is characterized by comprising the following steps:
(1) under the normal state of a link, the PC sends a waveform driving instruction to the light source driving module through the data acquisition card, and the light source driving module drives the light source module to emit a retrieval pulse signal with a preset waveform according to the received waveform driving instruction;
(2) the data acquisition card acquires the reflected signal acquired by the light receiving module in the normal state of the link and stores the reflected signal to a memory of the PC;
(3) the PC machine obtains a reference signal of a preset waveform by filtering a reflected signal under a normal state of a link;
(4) switching different preset waveforms, and repeating the steps (1) to (3) to obtain reference signals of all the preset waveforms;
(5) successively switching preset waveforms to obtain detection data of each channel and carrying out open circuit judgment; the disconnection determination method is as follows:
according to the encoding rule, the reflection signal of the search pulse signal containing a certain wavelength λ contains all the user terminal information, and the following formula is calculated according to the reflection signal:
in the above formula, Pi(t) represents the signal value of the reference signal at the wavelength λ at the time t, Pi' (T) denotes a signal value of a reflected signal of a wavelength λ at a time T, T denotes one period from a base point to the next base point, and i denotes a different preset waveform;
a threshold D is preset for each waveformi', if DiValue greater than threshold DiIf yes, judging to be open circuit;
(6) when the open circuit is judged, D corresponding to each waveform is obtainediValue, selected DiThe waveform with the maximum value is used as the optimal waveform;
(7) and carrying out routing inspection according to the selected optimal waveform.
2. A method of probing a pulse waveform self-commissioning a device as recited in claim 1 wherein said preset waveform comprises a gaussian, triangular, rectangular, primary stepped, secondary stepped and sinusoidal shape.
3. The method according to claim 1, wherein in step (1), the PC sends a set of protocol codes to the data acquisition card through serial communication, the protocol codes include waveform parameters, and the data acquisition card decodes and acquires the waveform driving command when detecting the stop bit data of the protocol codes.
4. A method for detecting pulse waveform self-debugging as claimed in claim 1, wherein in step (5), if the open circuit condition still does not occur after all waveforms are switched and polled for a certain time, then a certain link is manually disconnected and the link is taken back at intervals of several seconds.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0213383A1 (en) * | 1985-07-29 | 1987-03-11 | Siemens Aktiengesellschaft | Method and device for monitoring the operation of optical smoke detectors |
| CN102142892A (en) * | 2010-06-30 | 2011-08-03 | 华为技术有限公司 | Method for producing probe pulse and coherent light time-domain reflector |
| CN102986150A (en) * | 2010-05-27 | 2013-03-20 | 爱斯福公司 | Multiple-acquisition OTDR method and device |
| CN103297126A (en) * | 2013-06-07 | 2013-09-11 | 广西师范大学 | PON (passive optical network) line fault monitoring method and device based on optical mark method |
| CN104506970A (en) * | 2014-12-22 | 2015-04-08 | 东南大学 | Polling passive optical network optical layer detection method based on optical pre-coding |
| CN106685522A (en) * | 2017-01-24 | 2017-05-17 | 东南大学 | Network monitoring method and device based on polling matching |
| CN107749777A (en) * | 2017-11-22 | 2018-03-02 | 朱秋华 | A kind of fiber failure positioner and Fault Locating Method |
| CN107979411A (en) * | 2016-10-21 | 2018-05-01 | 中兴通讯股份有限公司 | The monitoring method and device of a kind of fiber link |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001119854A (en) * | 1999-10-15 | 2001-04-27 | Toyo Electric Mfg Co Ltd | Fault-detecting circuit |
| CN102377486B (en) * | 2011-11-23 | 2015-07-15 | 烽火通信科技股份有限公司 | System for monitoring non-reflection faults in passive optical network (PON) optical link |
-
2018
- 2018-12-28 CN CN201811620136.7A patent/CN109617600B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0213383A1 (en) * | 1985-07-29 | 1987-03-11 | Siemens Aktiengesellschaft | Method and device for monitoring the operation of optical smoke detectors |
| CN102986150A (en) * | 2010-05-27 | 2013-03-20 | 爱斯福公司 | Multiple-acquisition OTDR method and device |
| CN102142892A (en) * | 2010-06-30 | 2011-08-03 | 华为技术有限公司 | Method for producing probe pulse and coherent light time-domain reflector |
| CN103297126A (en) * | 2013-06-07 | 2013-09-11 | 广西师范大学 | PON (passive optical network) line fault monitoring method and device based on optical mark method |
| CN104506970A (en) * | 2014-12-22 | 2015-04-08 | 东南大学 | Polling passive optical network optical layer detection method based on optical pre-coding |
| CN107979411A (en) * | 2016-10-21 | 2018-05-01 | 中兴通讯股份有限公司 | The monitoring method and device of a kind of fiber link |
| CN106685522A (en) * | 2017-01-24 | 2017-05-17 | 东南大学 | Network monitoring method and device based on polling matching |
| CN107749777A (en) * | 2017-11-22 | 2018-03-02 | 朱秋华 | A kind of fiber failure positioner and Fault Locating Method |
Non-Patent Citations (2)
| Title |
|---|
| Advanced Fault-Monitoring Scheme for Ring-Based;Min Cen, Jiajia Chen;《JOURNAL OF LIGHTWAVE TECHNOLOGY》;20170515;全文 * |
| PON 监控系统中双周期结构编码器的性能分析;陈斯，张旋，孙小菡;《电子器件》;20160820;全文 * |
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