CN103905112A - Method, device and system for fault detection of passive optical network - Google Patents
Method, device and system for fault detection of passive optical network Download PDFInfo
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- CN103905112A CN103905112A CN201310170697.2A CN201310170697A CN103905112A CN 103905112 A CN103905112 A CN 103905112A CN 201310170697 A CN201310170697 A CN 201310170697A CN 103905112 A CN103905112 A CN 103905112A
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Abstract
The invention discloses a method, device and system for fault detection of a passive optical network. The method for fault detection of the passive optical network comprises the steps that optical reflectors are installed on ONU devices relevant to the same PON port one by one and an OTDR test is conducted every time one optical reflector is installed on the corresponding ONU device serving as current user equipment; an optical reflection signal which is obtained this time, serves as an OTDR test result of this time and is provided by an OTDR device is received, the optical reflection signal received this time is compared with an optical reflection signal received last time, a reflection peak with the amplitude changed in the optical reflection signal received this time and the optical reflection signal received last time is searched for, when the amplitude of the reflection peak is reduced, the current user equipment is correlated with the reflection peak, and therefore it is determined that the ONU device relevant to the reflection peak breaks down. Changes of the amplitude of the reflection peak are compared, so that whether the ONU devices in event dead zones break down or not is judged and the problem that the OTDR event dead zones generally exist in an existing network is effectively solved.
Description
Technical field
The present invention relates to the communications field, particularly a kind of passive optical network fault detection method, device and system.
Background technology
Passive light access technology is a kind of Optical Fiber Transmission and access technology of point-to-multipoint, owing to being point-to-multipoint access way, its composition mainly comprises: the OLT(Optical Line Terminal of local side, optical line terminal), the ONU(Optical Network Unit of user side, optical network unit) or ONT(Optical Network Terminal, Optical Network Terminal) and for connecting their ODN(Optical Distribution Network, optical distribution network).Wherein ODN does not contain any electronic device and electronic power supply, is all made up of passive devices such as optical fiber, optical cable, optical branching devices (Splitter), without valuable active electronic equipment.
At PON(Passive Optical Network; EPON) in the running of system; the measurement of optical fiber transmission property is the important content of PON system maintenance; monitoring by fibre circuit can be automatically, continue fibre circuit is carried out to online remote monitoring; the fibre circuit of periodic maintenance PON system, remote identification fault, can realize the fast reaction to fault; so that before upper layer network is influenced, realize the quick protection of bottom.
Optical time domain reflectometer (Optical Time Domain Reflectometer, be called for short OTDR) be the measuring equipment of measuring optical fiber transmission characteristic, it provides the decay details distributing along fiber lengths, comprises the event of any position on detection, location and measuring optical fiber cable link.Event refers in optical fiber link because the defect that welding, connector, adapter, wire jumper, bending or fracture etc. form.The variation of the light-transfer characteristic that this defect causes can be by OTDR measurement device, and OTDR device positions event according to these variations.
But, in the network topology of the point-to-multipoint of PON, there is the close or identical situation of user ONU fiber lengths after a large amount of same light splitting, we are defined as overlapping user's group these users, such as FTTB(Fiber to The Building, Fiber-To-The-Building) ONU of pattern is all placed on machine room, its fiber lengths is almost identical, and at FTTH(Fiber To The Home, Fiber to the home) under pattern, in same building, the range difference of the different ONT of resident family is very little.Under such scene, the signal that the test signal that OLT side OTDR fiber-optic probe equipment sends reflects through each branch is superimposed, OTDR can organize these overlapping users signal and merge into an event reflection peak, manually cannot distinguish the each user in these overlapping user's groups, in the time that these overlapping user's groups have user to break down, cannot find these faults, in view of this, that in prior art, detects for fibre circuit mainly contains following two kinds:
The first is by Y.Enomoto, H.Imita is on " optical fiber communication " periodical in 2003, exercise question is " having the fibre circuit monitoring system with 31.5dB dynamic range with optical fibre fault monitoring function of the PON system setting of 32 branch optical fibers " (Y.Enomoto, H.Imita, " Over31.5dB Dynamic Range Optical Fiber Line Testing System with Optical Fiber Fault Isolation Function for32-Branched PON ", OFC2003) in document, a kind of monitoring method has been proposed, the method specifically adds a speculum at the end of every branch optical fiber, reflection measurement signal, for the waveform that makes every branch optical fiber end reflection light is unlikely to overlapping, to make the length of every branch optical fiber different in PON networking, and can monitor branch optical fiber by the waveform of monitoring every branch optical fiber in test.But because the precondition of this monitoring technology is to ensure that every fiber lengths in PON system is different, increased difficulty to actual networking wiring, actual applicability is poor.
Due to the actual applicability of this scheme a little less than, people propose another kind of scheme, concrete steps as shown in Figure 1.Wherein:
Whether step 107, continue monitoring and definite case point and exist on other branch optical fiber, and particular location on branch optical fiber.
The case point position that application the method can be oriented branch optical fiber or trunk optical fiber, but because needs increase energy measurement unit on OLT and ONU/ONT, equipment is transformed, be unfavorable for that existing network is realized and popularization.
Therefore, be necessary to adopt other new technological means to solve that in Event Dead Zone customer incident point is distinguished and the problem of the concrete branch that failure judgement occurs.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of passive optical network fault detection method, device and system.Change to judge by the reflection peak amplitude that compares the ONU equipment being associated with same PON mouth whether ONU equipment exists fault in Event Dead Zone, thereby efficiently solve ubiquitous OTDR Event Dead Zone problem in existing network.
According to an aspect of the present invention, provide a kind of passive optical network fault detection method, comprising:
This light reflected signal of this OTDR test result of conduct that reception OTDR device provides; , one by one for the ONU equipment being associated with same PON mouth is installed reflective optical system, be wherein often that the ONU equipment as current user equipment is installed after reflective optical system, OTDR device is initiated an OTDR test to the ONU equipment being associated with described PON mouth;
This light reflected signal receiving and the last light reflected signal receiving are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak;
In the time that the amplitude of described reflection peak reduces, current user equipment is associated with described reflection peak, determine in the ONU equipment being associated with described reflection peak and have fault.
According to a further aspect in the invention, provide a kind of passive optical network fault checkout gear, comprising:
Receiving element, for receiving this light reflected signal of this OTDR test result of conduct that OTDR device provides; , one by one for the ONU equipment being associated with same PON mouth is installed reflective optical system, be wherein often that the ONU equipment as current user equipment is installed after reflective optical system, OTDR device is initiated an OTDR test to the ONU equipment being associated with described PON mouth;
Analytic unit, for this light reflected signal receiving and the last light reflected signal receiving are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak;
Decision unit, for according to the analysis result of analytic unit, in the time that the amplitude of described reflection peak reduces, is associated current user equipment with described reflection peak, determine in the ONU equipment being associated with described reflection peak and have fault.
According to a further aspect in the invention, provide a kind of passive optical network fault detection system, comprise OTDR device, passive optical network fault checkout gear, wherein:
OTDR device, initiate OTDR test for the ONU equipment to being associated with same PON mouth, wherein one by one for the ONU equipment being associated with same PON mouth is installed reflective optical system, being often that the ONU equipment as current user equipment is installed after reflective optical system, initiate an OTDR test to the ONU equipment being associated with described PON mouth; Also this light reflected signal as this OTDR test result is sent to passive optical network fault checkout gear;
Passive optical network fault checkout gear, for receiving this light reflected signal of this OTDR test result of conduct that OTDR device provides, this light reflected signal receiving and the last light reflected signal receiving are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak, in the time that the amplitude of described reflection peak reduces, current user equipment is associated with described reflection peak, determines in the ONU equipment being associated with described reflection peak and have fault.
The present invention for the ONU equipment being associated with same PON mouth is installed reflective optical system, is being often that the ONU equipment as current user equipment is installed after reflective optical system by one by one, and OTDR device is initiated an OTDR test to the ONU equipment being associated with described PON mouth.This light reflected signal of this OTDR test result of conduct that reception OTDR device provides, this light reflected signal receiving and the last light reflected signal receiving are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak, in the time that the amplitude of described reflection peak reduces, current user equipment is associated with described reflection peak, determines in the ONU equipment being associated with described reflection peak and have fault.Change to judge by the reflection peak amplitude that compares the ONU equipment being associated with same PON mouth whether ONU equipment exists fault in Event Dead Zone, thereby efficiently solve ubiquitous OTDR Event Dead Zone problem in existing network.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic diagram that detects an embodiment of PON network failure in prior art.
Fig. 2 is the schematic diagram of an embodiment of passive optical network fault detection method of the present invention.
Fig. 3 is the schematic diagram of another embodiment of passive optical network fault detection method of the present invention.
Fig. 4 is the schematic diagram of an embodiment of network configuration of application passive optical network fault detection method of the present invention.
Fig. 5 is the schematic diagram of an embodiment of light reflected signal of the present invention.
Fig. 6 is the schematic diagram of another embodiment of light reflected signal of the present invention.
Fig. 7 is the schematic diagram of an embodiment of passive optical network fault checkout gear of the present invention.
Fig. 8 is the schematic diagram of another embodiment of passive optical network fault checkout gear of the present invention.
Fig. 9 is the schematic diagram of an embodiment of passive optical network fault detection system of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the present invention and application or use.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Unless illustrate in addition, otherwise the parts of setting forth in these embodiments and positioned opposite, numeral expression formula and the numerical value of step not limited the scope of the invention.
, it should be understood that for convenience of description, the size of the various piece shown in accompanying drawing is not to draw according to actual proportionate relationship meanwhile.
May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in suitable situation, described technology, method and apparatus should be regarded as authorizing a part for specification.
In all examples with discussing shown here, it is exemplary that any occurrence should be construed as merely, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.
It should be noted that: in similar label and letter accompanying drawing below, represent similar terms, therefore, once be defined in an a certain Xiang Yi accompanying drawing, in accompanying drawing subsequently, do not need it to be further discussed.
Fig. 2 is the schematic diagram of an embodiment of passive optical network fault detection method of the present invention.Preferably, the method step of the present embodiment is detected and is carried out by passive optical network fault.
, one by one for the ONU equipment being associated with same PON mouth is installed reflective optical system, be wherein often that the ONU equipment as current user equipment is installed after reflective optical system, OTDR device is initiated an OTDR test to the ONU equipment being associated with described PON mouth.
The passive optical network fault detection method providing based on the above embodiment of the present invention, by being one by one the ONU equipment installation reflective optical system being associated with same PON mouth, be often that the ONU equipment as current user equipment is installed after reflective optical system, OTDR device is initiated an OTDR test to the ONU equipment being associated with described PON mouth.This light reflected signal of this OTDR test result of conduct that reception OTDR device provides, this light reflected signal receiving and the last light reflected signal receiving are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak, in the time that the amplitude of described reflection peak reduces, current user equipment is associated with described reflection peak, determines in the ONU equipment being associated with described reflection peak and have fault.Change to judge by the reflection peak amplitude that compares the ONU equipment being associated with same PON mouth whether ONU equipment exists fault in Event Dead Zone, thereby efficiently solve ubiquitous OTDR Event Dead Zone problem in existing network.
Preferably, in the time that the amplitude of described reflection peak increases, current user equipment is associated with described reflection peak, determines that current user equipment is newly-increased ONU equipment.
Fig. 3 is the schematic diagram of another embodiment of passive optical network fault detection method of the present invention.As shown in Figure 3, the method step of the present embodiment is as follows:
The OTDR test mode relating in the mode that wherein OTDR device is tested to the ONU equipment initiation OTDR being associated with PON mouth and above-mentioned steps 201 is identical.
Below by concrete example, the technical solution adopted in the present invention is described.
Fig. 4 is the schematic diagram of an embodiment of network configuration of application passive optical network fault detection method of the present invention.As shown in Figure 4, under same PON, there are 6 ONU equipment, represented by ONU1-ONU6.
The scheme proposing according to the application, one by one for ONU installs reflective optical system, and is often that an ONU installation reflective optical system is just initiated an OTDR test, then obtains the light reflected signal of this test by OTDR device.The light reflected signal obtaining as shown in Figure 5.
It should be noted that, in the situation that ONU1-ONU6 does not all install reflective optical system, the light reflected signal obtaining does not have reflection peak.The in the situation that of carrying out OTDR test after reflective optical system being installed for ONU1, light reflected signal comprises reflection peak 1.Installing for ONU2 carry out OTDR test after reflective optical system in the situation that, because the fiber lengths of ONU1 and ONU2 has comparatively significantly difference, now in light reflected signal except after reflection peak 1, also comprise new reflection peak 2.Next, the in the situation that of carrying out OTDR test after reflective optical system being installed for ONU3, because the fiber lengths of ONU2 and ONU3 is identical or close, belong to the situation that above-mentioned overlapping user organizes, now in light reflected signal, still there are two reflection peaks, wherein reflection peak 1 does not change, and the amplitude of reflection peak 2 increases, and represents with reflection peak 3.Installing for ONU4 carry out OTDR test after reflective optical system in the situation that, because the fiber lengths of ONU4 and ONU1-ONU3 has comparatively significantly difference, now in light reflected signal except after reflection peak 1 and reflection peak 3, also comprise new reflection peak 4.The in the situation that of carrying out OTDR test after reflective optical system being installed for ONU5, because the fiber lengths of ONU5 and ONU4 is identical or close, belong to the situation that above-mentioned overlapping user organizes, now in light reflected signal, still there are three reflection peaks, wherein reflection peak 1, reflection peak 3 do not change, the amplitude of reflection peak 4 increases, and represents with reflection peak 5.Equally, because ONU6 is identical or close with the fiber lengths of ONU5 with ONU4, therefore the in the situation that of carrying out OTDR test after reflective optical system being installed for ONU6, in light reflected signal, still there are three reflection peaks, wherein reflection peak 1, reflection peak 3 do not change, the amplitude of reflection peak 5 increases, and represents with reflection peak 6.For brevity, in Fig. 5, provided the light reflected signal obtaining the in the situation that of carrying out OTDR test after reflective optical system being installed for ONU6, and the reflection peak 2 obtaining, reflection peak 4 and reflection peak 5 use dotted lines are described in this process.
Known by above-mentioned processing, ONU1 is associated with reflection peak 1, and ONU2 and ONU3 are associated with reflection peak 3, and ONU4-ONU6 is associated with reflection peak 6.
If reflective optical system is pulled out, or the fiber break of connection reflective optical system, situation when the variation of corresponding reflection peak is with installation reflective optical system is contrary, and associated reflections peak amplitude can reduce.
Fig. 6 is the schematic diagram of another embodiment of light reflected signal of the present invention.Equally, in the situation that ONU1-ONU6 does not all install reflective optical system, the light reflected signal obtaining does not have reflection peak.The in the situation that of carrying out OTDR test after reflective optical system being installed for ONU1, light reflected signal comprises reflection peak 1.Installing for ONU2 carry out OTDR test after reflective optical system in the situation that, because the fiber lengths of ONU1 and ONU2 has comparatively significantly difference, now in light reflected signal except after reflection peak 1, also comprise new reflection peak 2.
Next, the in the situation that of carrying out OTDR test after reflective optical system being installed for ONU3, because the fiber lengths of ONU2 and ONU3 is identical or close, when an ONU branch optical fiber in ONU2 and ONU3 interrupts simultaneously, now in light reflected signal, still there are two reflection peaks, wherein reflection peak 1 does not change, and the amplitude of reflection peak 2 reduces, and represents with reflection peak 31.Installing for ONU4 carry out OTDR test after reflective optical system in the situation that, because the fiber lengths of ONU4 and ONU1-ONU3 has comparatively significantly difference, now in light reflected signal except after reflection peak 1 and reflection peak 31, also comprise new reflection peak 4.The in the situation that of carrying out OTDR test after reflective optical system being installed for ONU5, because the fiber lengths of ONU5 and ONU4 is identical or close, belong to the situation that above-mentioned overlapping user organizes, now in light reflected signal, still there are three reflection peaks, wherein reflection peak 1, reflection peak 31 do not change, the amplitude of reflection peak 4 increases, and represents with reflection peak 5.Equally, because ONU6 is identical or close with the fiber lengths of ONU5 with ONU4, therefore the in the situation that of carrying out OTDR test after reflective optical system being installed for ONU6, in light reflected signal, still there are three reflection peaks, wherein reflection peak 1, reflection peak 31 do not change, the amplitude of reflection peak 5 increases, and represents with reflection peak 6.For brevity, in Fig. 6, provided the light reflected signal obtaining the in the situation that of carrying out OTDR test after reflective optical system being installed for ONU6, and the reflection peak 2 obtaining, reflection peak 4 and reflection peak 5 use dotted lines are described in this process.
The feature changing according to the reflection peak amplitude of installing before and after reflective optical system, can contrast this light reflected signal receiving and the last light reflected signal receiving, and judges in this light reflected signal whether occur new reflection peak.If there is new reflection peak in this light reflected signal, current user equipment is associated with described new reflection peak, determine that current user equipment is newly-increased ONU equipment.If there is not new reflection peak in this light reflected signal, further search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak.In the time that the amplitude of described reflection peak reduces and meet default rule, current user equipment is associated with described reflection peak, determine in the ONU equipment being associated with described reflection peak and have fault.In the time that the amplitude of described reflection peak increases and meet default rule, current user equipment is associated with described reflection peak, determine that current user equipment is newly-increased ONU equipment.
Fig. 7 is the schematic diagram of an embodiment of passive optical network fault checkout gear of the present invention.As shown in Figure 7, passive optical network fault checkout gear comprises:
Receiving element 701, for receiving this light reflected signal of this OTDR test result of conduct that OTDR device provides.
, one by one for the ONU equipment being associated with same PON mouth is installed reflective optical system, be wherein often that the ONU equipment as current user equipment is installed after reflective optical system, OTDR device is initiated an OTDR test to the ONU equipment being associated with described PON mouth.
The passive optical network fault checkout gear providing based on the above embodiment of the present invention, by being one by one the ONU equipment installation reflective optical system being associated with same PON mouth, be often that the ONU equipment as current user equipment is installed after reflective optical system, OTDR device is initiated an OTDR test to the ONU equipment being associated with described PON mouth.This light reflected signal of this OTDR test result of conduct that reception OTDR device provides, this light reflected signal receiving and the last light reflected signal receiving are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak, in the time that the amplitude of described reflection peak reduces, current user equipment is associated with described reflection peak, determines in the ONU equipment being associated with described reflection peak and have fault.Change to judge by the reflection peak amplitude that compares the ONU equipment being associated with same PON mouth whether ONU equipment exists fault in Event Dead Zone, thereby efficiently solve ubiquitous OTDR Event Dead Zone problem in existing network.
Preferably, decision unit 703 also, for according to the analysis result of analytic unit 702, in the time that the amplitude of described reflection peak increases, is associated current user equipment with described reflection peak, determines that current user equipment is newly-increased ONU equipment.
Fig. 8 is the schematic diagram of another embodiment of passive optical network fault checkout gear of the present invention.Compared with embodiment illustrated in fig. 7, in the embodiment shown in fig. 8, analytic unit 702 comprises identification module 801 and searches module 802.Wherein:
Preferably, decision unit 703, also for according to the judged result of identification module 801, if there is new reflection peak in this light reflected signal, is associated current user equipment with described new reflection peak, determines that current user equipment is newly-increased ONU equipment.
Fig. 9 is the schematic diagram of an embodiment of passive optical network fault detection system of the present invention.As shown in Figure 9, passive optical network fault detection system comprises OTDR device 901, passive optical network fault checkout gear 902.Wherein:
OTDR device 901, initiate OTDR test for the ONU equipment to being associated with same PON mouth, wherein one by one for the ONU equipment being associated with same PON mouth is installed reflective optical system, being often that the ONU equipment as current user equipment is installed after reflective optical system, initiate an OTDR test to the ONU equipment being associated with described PON mouth; Also this light reflected signal as this OTDR test result is sent to passive optical network fault checkout gear.
Passive optical network fault checkout gear 902, for receiving this light reflected signal of this OTDR test result of conduct that OTDR device provides, this light reflected signal receiving and the last light reflected signal receiving are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak, in the time that the amplitude of described reflection peak reduces, current user equipment is associated with described reflection peak, determines in the ONU equipment being associated with described reflection peak and have fault.
Preferably, passive optical network fault checkout gear 902 is the passive optical network fault checkout gear that in Fig. 7 or Fig. 8, arbitrary embodiment relates to.
The present invention passes through the analysis of the reflection peak peak change rule that OTDR is received, the identification of multiple ONU case points in realization event blind area, and find in time the user's branch optical fiber fault in Event Dead Zone.
The application compared with prior art, has the following advantages:
1, in the engineering construction stage, solve the identification problem of overlapping user in Event Dead Zone, distinguish user without installing tail optical fiber additional; Without OLT and ONU equipment are transformed, do not need to increase energy test unit simultaneously, effectively saved engineering construction improvement cost.
2, at maintenance phase, find the light path fault in Event Dead Zone by the analysis of reflection peak peak change rule, and effectively utilize PON EMS network management alarm information finally to determine fault branch, improve energetically efficiency and the accuracy of failure diagnosis.
3, existing network using value aspect, can solve the problem of the ubiquitous branch optical fiber range difference of existing network lower than OTDR Event Dead Zone.
One of ordinary skill in the art will appreciate that all or part of step that realizes above-described embodiment can complete by hardware, also can carry out the hardware that instruction is relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a passive optical network fault detection method, is characterized in that, comprising:
This light reflected signal of this OTDR test result of conduct that reception optical time domain reflectometer OTDR device provides; Wherein one by one for the optical network unit ONU equipment being associated with same passive optical network PON mouth is installed reflective optical system, be often that the ONU equipment as current user equipment is installed after reflective optical system, OTDR device is initiated an OTDR test to the ONU equipment being associated with described PON mouth;
This light reflected signal receiving and the last light reflected signal receiving are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak;
In the time that the amplitude of described reflection peak reduces, current user equipment is associated with described reflection peak, determine in the ONU equipment being associated with described reflection peak and have fault.
2. method according to claim 1, is characterized in that:
In the time that the amplitude of described reflection peak increases, current user equipment is associated with described reflection peak, determine that current user equipment is newly-increased ONU equipment.
3. method according to claim 1 and 2, is characterized in that:
This light reflected signal receiving and the last light reflected signal receiving are contrasted, search this light reflected signal with on the step of the reflection peak that amplitude changes in the light reflected signal that once receives comprise:
This light reflected signal receiving and the last light reflected signal receiving are contrasted, judge in this light reflected signal whether occur new reflection peak;
If there is not new reflection peak in this light reflected signal, carry out search this light reflected signal with on the step of the reflection peak that amplitude changes in the light reflected signal that once receives.
4. method according to claim 3, is characterized in that:
If there is new reflection peak in this light reflected signal, current user equipment is associated with described new reflection peak, determine that current user equipment is newly-increased ONU equipment.
5. a passive optical network fault checkout gear, is characterized in that, comprising:
Receiving element, for receiving this light reflected signal of this OTDR test result of conduct that optical time domain reflectometer OTDR device provides; Wherein one by one for the optical network unit ONU equipment being associated with same passive optical network PON mouth is installed reflective optical system, be often that the ONU equipment as current user equipment is installed after reflective optical system, OTDR device is initiated an OTDR test to the ONU equipment being associated with described PON mouth;
Analytic unit, for this light reflected signal receiving and the last light reflected signal receiving are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak;
Decision unit, for according to the analysis result of analytic unit, in the time that the amplitude of described reflection peak reduces, is associated current user equipment with described reflection peak, determine in the ONU equipment being associated with described reflection peak and have fault.
6. device according to claim 5, is characterized in that:
Decision unit also, for according to the analysis result of analytic unit, in the time that the amplitude of described reflection peak increases, is associated current user equipment with described reflection peak, determine that current user equipment is newly-increased ONU equipment.
7. according to the device described in claim 5 or 6, it is characterized in that:
Analytic unit comprises identification module and search module, wherein:
Identification module, for this light reflected signal receiving and the last light reflected signal receiving are contrasted, judges in this light reflected signal whether occur new reflection peak;
Search module, for according to the judged result of identification module, if there is not new reflection peak in this light reflected signal, carry out search this light reflected signal with on the operation of the reflection peak that amplitude changes in the light reflected signal that once receives.
8. device according to claim 7, is characterized in that:
Decision unit, also for according to the judged result of identification module, if there is new reflection peak in this light reflected signal, is associated current user equipment with described new reflection peak, determine that current user equipment is newly-increased ONU equipment.
9. a passive optical network fault detection system, is characterized in that, comprises optical time domain reflectometer OTDR device, passive optical network fault checkout gear, wherein:
OTDR device, initiate OTDR test for the optical network unit ONU equipment to being associated with same passive optical network PON mouth, wherein one by one for the ONU equipment being associated with same PON mouth is installed reflective optical system, being often that the ONU equipment as current user equipment is installed after reflective optical system, initiate an OTDR test to the ONU equipment being associated with described PON mouth; Also this light reflected signal as this OTDR test result is sent to passive optical network fault checkout gear;
Passive optical network fault checkout gear, for receiving this light reflected signal of this OTDR test result of conduct that OTDR device provides, this light reflected signal receiving and the last light reflected signal receiving are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak, in the time that the amplitude of described reflection peak reduces, current user equipment is associated with described reflection peak, determines in the ONU equipment being associated with described reflection peak and have fault.
10. system according to claim 9, is characterized in that:
Passive optical network fault checkout gear is the passive optical network fault checkout gear that in claim 5-8, any one relates to.
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| CN201310170697.2A CN103905112B (en) | 2012-12-26 | 2013-05-10 | passive optical network fault detection method, device and system |
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| WO2017206371A1 (en) * | 2016-05-31 | 2017-12-07 | 中兴通讯股份有限公司 | Optical fiber network fault detection method, device, and system |
| CN108512592A (en) * | 2018-04-13 | 2018-09-07 | 国网山西省电力公司信息通信分公司 | A kind of interruption of optical cables type diagnostic system and method based on breakpoint figure characteristic point |
| WO2021031552A1 (en) * | 2019-08-22 | 2021-02-25 | 华为技术有限公司 | Method and system for acquiring optical fiber coding, and related device |
| CN112713931A (en) * | 2021-01-27 | 2021-04-27 | 武汉光迅科技股份有限公司 | OTDR equipment, optical time domain reflection detection method and storage medium |
| WO2021098341A1 (en) * | 2019-11-19 | 2021-05-27 | 华为技术有限公司 | Port identification method and apparatus, system, and splitter |
| CN115347946A (en) * | 2022-06-28 | 2022-11-15 | 烽火通信科技股份有限公司 | Fault detection method, device and system of passive optical network |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008294528A (en) * | 2007-05-22 | 2008-12-04 | Chunghwa Telecom Co Ltd | Device and method for monitoring and measuring optical fiber fault on passive optical network |
| CN101360984A (en) * | 2006-02-03 | 2009-02-04 | 株式会社藤仓 | Light beam path monitoring device and light beam path monitoring method |
| US20100316372A1 (en) * | 2009-06-12 | 2010-12-16 | Chu-Lin Chang | Signal switching module for optical network monitoring and fault locating |
| CN102055523A (en) * | 2009-11-09 | 2011-05-11 | 中国移动通信集团江苏有限公司 | Method, equipment and system for diagnosing failure of passive optical network |
| CN102104423A (en) * | 2009-12-22 | 2011-06-22 | 中兴通讯股份有限公司 | Fault detection method and system for multi-branch PON (Passive Optical Network) |
| CN102739306A (en) * | 2012-06-11 | 2012-10-17 | 烽火通信科技股份有限公司 | Method for automatically testing optical link in passive optical network |
-
2013
- 2013-05-10 CN CN201310170697.2A patent/CN103905112B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101360984A (en) * | 2006-02-03 | 2009-02-04 | 株式会社藤仓 | Light beam path monitoring device and light beam path monitoring method |
| JP2008294528A (en) * | 2007-05-22 | 2008-12-04 | Chunghwa Telecom Co Ltd | Device and method for monitoring and measuring optical fiber fault on passive optical network |
| US20100316372A1 (en) * | 2009-06-12 | 2010-12-16 | Chu-Lin Chang | Signal switching module for optical network monitoring and fault locating |
| CN102055523A (en) * | 2009-11-09 | 2011-05-11 | 中国移动通信集团江苏有限公司 | Method, equipment and system for diagnosing failure of passive optical network |
| CN102104423A (en) * | 2009-12-22 | 2011-06-22 | 中兴通讯股份有限公司 | Fault detection method and system for multi-branch PON (Passive Optical Network) |
| CN102739306A (en) * | 2012-06-11 | 2012-10-17 | 烽火通信科技股份有限公司 | Method for automatically testing optical link in passive optical network |
Non-Patent Citations (3)
| Title |
|---|
| BOON CHUAN NG • MOHAMMAD SYUHAIMI AB-RAHMAN •,ETAL.: "High Efficiency of PON Network Monitoring and Management", 《JOURNAL OF NETWORK AND SYSTEMS MANAGEMENT》 * |
| 尧昱等: "光分配网故障诊断技术研究与应用", 《光通信研究》 * |
| 尧昱等: "基于OTDR的PON光纤故障定位方法", 《电信科学》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104579460A (en) * | 2014-12-15 | 2015-04-29 | 国家电网公司 | Centralized measurement method of FTTx passive optical network |
| WO2017206371A1 (en) * | 2016-05-31 | 2017-12-07 | 中兴通讯股份有限公司 | Optical fiber network fault detection method, device, and system |
| CN107084833A (en) * | 2017-05-04 | 2017-08-22 | 薛鹏 | Diagnostic optical fiber method and system based on fiber optic wavelength matrix |
| CN108512592A (en) * | 2018-04-13 | 2018-09-07 | 国网山西省电力公司信息通信分公司 | A kind of interruption of optical cables type diagnostic system and method based on breakpoint figure characteristic point |
| WO2021031552A1 (en) * | 2019-08-22 | 2021-02-25 | 华为技术有限公司 | Method and system for acquiring optical fiber coding, and related device |
| WO2021098341A1 (en) * | 2019-11-19 | 2021-05-27 | 华为技术有限公司 | Port identification method and apparatus, system, and splitter |
| CN112713931A (en) * | 2021-01-27 | 2021-04-27 | 武汉光迅科技股份有限公司 | OTDR equipment, optical time domain reflection detection method and storage medium |
| CN112713931B (en) * | 2021-01-27 | 2022-03-11 | 武汉光迅科技股份有限公司 | OTDR equipment, optical time domain reflection detection method and storage medium |
| CN115347946A (en) * | 2022-06-28 | 2022-11-15 | 烽火通信科技股份有限公司 | Fault detection method, device and system of passive optical network |
| CN115347946B (en) * | 2022-06-28 | 2023-05-26 | 烽火通信科技股份有限公司 | Fault detection method, device and system of passive optical network |
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