CN103905112B - passive optical network fault detection method, device and system - Google Patents
passive optical network fault detection method, device and system Download PDFInfo
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- CN103905112B CN103905112B CN201310170697.2A CN201310170697A CN103905112B CN 103905112 B CN103905112 B CN 103905112B CN 201310170697 A CN201310170697 A CN 201310170697A CN 103905112 B CN103905112 B CN 103905112B
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Abstract
The present invention discloses a kind of passive optical network fault detection method, device and system.Wherein in passive optical network fault detection method, by one by one for the ONU equipment be associated with same PON mouth installs reflective optical system, be often after an ONU equipment as current user equipment installs reflective optical system, initiate an OTDR test.Receive this light reflected signal as this OTDR test result that OTDR device provides, this light reflected signal received and the last light reflected signal received are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak, when the amplitude of described reflection peak reduces, current user equipment is associated with described reflection peak, determines to there is fault in the ONU equipment be associated with described reflection peak.Judge whether ONU equipment exists fault in Event Dead Zone by comparing the change of reflection peak amplitude, thus efficiently solve ubiquitous OTDR Event Dead Zone problem in existing network.
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(OpticalLineTerminal of local side, optical line terminal), the ONU(OpticalNetworkUnit of user side, optical network unit) or ONT(OpticalNetworkTerminal, Optical Network Terminal) and for connecting their ODN(OpticalDistributionNetwork, optical distribution network).Wherein ODN is not containing any electronic device and electronic power supply, is all made up of, without the need to valuable active electronic devices passive devices such as optical fiber, optical cable, optical branching devices (Splitter).
At PON(PassiveOpticalNetwork; EPON) system running in; the measurement of optical fiber transmission property is the important content that PON system is safeguarded; by fibre circuit monitoring can automatically, continue online remote monitoring is carried out to fibre circuit; 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 (OpticalTimeDomainReflectometer, be called for short OTDR) be the measuring equipment of measuring optical fiber transmission characteristic, which provide the decay details along fiber lengths distribution, comprise 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. are formed.The change of the light-transfer characteristic that this defect causes can by OTDR measurement device, and OTDR device positions event according to these changes.
But, in the network topology of the point-to-multipoint of PON, there is the situation that user ONU fiber lengths after a large amount of same light splitting is close or identical, we are defined as overlapping user group these users, such as FTTB(FibertoTheBuilding, Fiber-To-The-Building) ONU of pattern is all placed on machine room, its fiber lengths is almost identical, and at FTTH(FiberToTheHome, fiber to the home) under pattern, in same building, the range difference of different resident family ONT is very little.Under such a scenario, the signal that the test signal that OLT side OTDR fiber-optic probe equipment sends reflects through each branch is superimposed, these overlapping user group signals can be merged into an event reflections peak by OTDR, manually cannot distinguish each user in these overlapping user groups, when these overlapping user groups have user to break down, cannot find these faults, in view of this, that detects for fibre circuit in prior art mainly contains following two kinds:
The first is by Y.Enomoto, H.Imita is on " optical fiber communication " periodical in 2003, exercise question is " the fibre circuit monitoring system with 31.5dB dynamic range with optical fibre fault monitoring function that the PON system with 32 branch optical fibers is arranged " (Y.Enomoto, H.Imita, " Over31.5dBDynamicRangeOpticalFiberLineTestingSystemwithO pticalFiberFaultIsolationFunctionfor32-BranchedPON ", OFC2003) in document, propose a kind of monitoring method, the method specifically adds a speculum at the end of every bar branch optical fiber, reflection measurement signal, be unlikely to overlapping to make the waveform of every bar branch optical fiber end reflection light, need to make the length of every bar branch optical fiber different in PON networking, and branch optical fiber can be monitored by the waveform of monitoring every bar branch optical fiber in testing.But due to the precondition of this monitoring technology be that the every bar fiber lengths ensured in PON system is different, add difficulty to actual networking wiring, actual applicability is poor.
Because the actual applicability of this scheme is more weak, people propose another kind of scheme, and concrete steps as shown in Figure 1.Wherein:
Step 101, determines the type of case point and determines the distance of case point from OLT.
Step 102, judges this case point whether on trunk optical fiber.If decision event point is on trunk optical fiber, then perform step 103; If this case point exceedes the distance of trunk optical fiber from the distance of this OLT, then perform step 104.
Step 103, determines the particular location of this case point on this trunk optical fiber.Afterwards, other step of this programme is no longer performed.
Step 104, determines that this case point is present on the branch optical fiber of this OLT to certain ONU/ONT.Testing equipment or the function of a test signal energy are now set respectively on OLT and each ONU/ONT, are called as energy measuring unit, are determined the light loss of light path between OLT and each ONU/ONT by this unit.
Step 105, judges case point whether on current branch optical fiber according to the relation of the light loss of this light path normal loss corresponding with this light path.When the light loss of light path is greater than normal loss, then judge that case point is on current branch optical fiber, and enter step 106; Otherwise, enter step 107.
Step 106, is determining the position of this case point on described optical fiber according to case point from the distance of OLT.
Step 107, continues monitoring and determines whether case point exists on other branch optical fiber, and the particular location on branch optical fiber.
Application the method can orient the case point position of branch optical fiber or trunk optical fiber, but on OLT and ONU/ONT, increases energy measuring unit due to needs, transforms, be unfavorable for that existing network realizes and popularization to equipment.
Therefore, be necessary that the technological means adopting other new solves the problem of the concrete branch that customer incident point is distinguished and failure judgement occurs in Event Dead Zone.
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 whether ONU equipment exists fault in Event Dead Zone by the reflection peak amplitude comparing the ONU equipment be associated with same PON mouth, thus efficiently solve ubiquitous OTDR Event Dead Zone problem in existing network.
According to an aspect of the present invention, a kind of passive optical network fault detection method is provided, comprises:
Receive this light reflected signal as this OTDR test result that OTDR device provides; ONU equipment wherein one by one for being associated with same PON mouth installs reflective optical system, is being often that after an ONU equipment as current user equipment installs reflective optical system, OTDR device is initiated an OTDR to the ONU equipment be associated with described PON mouth and tested;
This light reflected signal received and the last light reflected signal received are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak;
When the amplitude of described reflection peak reduces, current user equipment is associated with described reflection peak, determines to there is fault in the ONU equipment be associated with described reflection peak.
According to a further aspect in the invention, a kind of passive optical network fault checkout gear is provided, comprises:
Receiving element, for receiving this light reflected signal as this OTDR test result that OTDR device provides; ONU equipment wherein one by one for being associated with same PON mouth installs reflective optical system, is being often that after an ONU equipment as current user equipment installs reflective optical system, OTDR device is initiated an OTDR to the ONU equipment be associated with described PON mouth and tested;
Analytic unit, for this light reflected signal received and the last light reflected signal received are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak;
Decision unit, for the analysis result according to analytic unit, when the amplitude of described reflection peak reduces, is associated current user equipment with described reflection peak, determines to there is fault in the ONU equipment be associated with described reflection peak.
According to a further aspect in the invention, a kind of passive optical network fault detection system is provided, comprises OTDR device, passive optical network fault checkout gear, wherein:
OTDR device, test for initiating OTDR to the ONU equipment be associated with same PON mouth, ONU equipment wherein one by one for being associated with same PON mouth installs reflective optical system, be often, after an ONU equipment as current user equipment installs reflective optical system, initiate an OTDR to the ONU equipment be associated with described PON mouth and test; 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 as this OTDR test result that OTDR device provides, this light reflected signal received and the last light reflected signal received are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak, when the amplitude of described reflection peak reduces, current user equipment is associated with described reflection peak, determines to there is fault in the ONU equipment be associated with described reflection peak.
The present invention, by one by one for the ONU equipment be associated with same PON mouth installs reflective optical system, is being often that after an ONU equipment as current user equipment installs reflective optical system, OTDR device is initiated an OTDR to the ONU equipment be associated with described PON mouth and tested.Receive this light reflected signal as this OTDR test result that OTDR device provides, this light reflected signal received and the last light reflected signal received are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak, when the amplitude of described reflection peak reduces, current user equipment is associated with described reflection peak, determines to there is fault in the ONU equipment be associated with described reflection peak.Change to judge whether ONU equipment exists fault in Event Dead Zone by the reflection peak amplitude comparing the ONU equipment be associated with same PON mouth, thus efficiently solve ubiquitous OTDR Event Dead Zone problem in existing network.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram detecting a PON fault embodiment in prior art.
Fig. 2 is the schematic diagram of a passive optical network fault detection method of the present invention embodiment.
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 the network configuration embodiment applying passive optical network fault detection method of the present invention.
Fig. 5 is the schematic diagram of a light reflected signal of the present invention embodiment.
Fig. 6 is the schematic diagram of another embodiment of light reflected signal of the present invention.
Fig. 7 is the schematic diagram of a passive optical network fault checkout gear of the present invention embodiment.
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 a passive optical network fault detection system of the present invention embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.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 obtained under creative work prerequisite, belong to the scope of protection of the invention.
Unless specifically stated otherwise, otherwise positioned opposite, the numerical expression of the parts of setting forth in these embodiments and step and numerical value do not limit the scope of the invention.
Meanwhile, it should be understood that for convenience of description, the size of the various piece shown in accompanying drawing is not draw according to the proportionate relationship of reality.
May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in the appropriate case, described technology, method and apparatus should be regarded as a part of authorizing specification.
In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.
Fig. 2 is the schematic diagram of a passive optical network fault detection method of the present invention embodiment.Preferably, the method step of the present embodiment is detected by passive optical network fault and performs.
Step 201, receives this light reflected signal as this OTDR test result that OTDR device provides.
ONU equipment wherein one by one for being associated with same PON mouth installs reflective optical system, is being often that after an ONU equipment as current user equipment installs reflective optical system, OTDR device is initiated an OTDR to the ONU equipment be associated with described PON mouth and tested.
Step 202, contrasts this light reflected signal received and the last light reflected signal received, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak.
Step 203, when the amplitude of described reflection peak reduces, is associated current user equipment with described reflection peak, determines to there is fault in the ONU equipment be associated with described reflection peak.
Based on the passive optical network fault detection method that the above embodiment of the present invention provides, by one by one for the ONU equipment that is associated with same PON mouth installs reflective optical system, be often that after an ONU equipment as current user equipment installs reflective optical system, OTDR device is initiated an OTDR to the ONU equipment be associated with described PON mouth and tested.Receive this light reflected signal as this OTDR test result that OTDR device provides, this light reflected signal received and the last light reflected signal received are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak, when the amplitude of described reflection peak reduces, current user equipment is associated with described reflection peak, determines to there is fault in the ONU equipment be associated with described reflection peak.Change to judge whether ONU equipment exists fault in Event Dead Zone by the reflection peak amplitude comparing the ONU equipment be associated with same PON mouth, thus efficiently solve ubiquitous OTDR Event Dead Zone problem in existing network.
Preferably, when 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:
Step 301, receives this light reflected signal as this OTDR test result that OTDR device provides.
Wherein OTDR device is to identical with the OTDR test mode that the ONU equipment that PON mouth is associated is initiated to relate in mode that OTDR tests and above-mentioned steps 201.
Step 302, contrasts this light reflected signal received and the last light reflected signal received, judges whether occur new reflection peak in this light reflected signal.If there is new reflection peak in this light reflected signal, then perform step 303; If there is not new reflection peak in this light reflected signal, then perform step 304.
Step 303, is associated current user equipment with described new reflection peak, determines that current user equipment is newly-increased ONU equipment.Afterwards, other step of the present embodiment is no longer performed.
Step 304, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak.When the amplitude of described reflection peak reduces, perform step 305; When the amplitude of described reflection peak increases, perform step 306.
Step 305, is associated current user equipment with described reflection peak, determines to there is fault in the ONU equipment be associated with described reflection peak.Afterwards, other step of the present embodiment is no longer performed.
Step 306, is associated current user equipment with described reflection peak, determines that current user equipment is newly-increased ONU equipment.
Below by concrete example, the technical solution adopted in the present invention is described.
Fig. 4 is the schematic diagram of the network configuration embodiment applying 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.
According to the scheme that the application proposes, one by one for ONU installs reflective optical system, and be often that an ONU installs a reflective optical system just initiation OTDR test, then obtained the light reflected signal of this test by OTDR device.The light reflected signal obtained as shown in Figure 5.
It should be noted that, when ONU1-ONU6 does not all install reflective optical system, the light reflected signal obtained does not have reflection peak.When carrying out OTDR test after installing reflective optical system for ONU1, light reflected signal comprises reflection peak 1.When install for ONU2 carry out OTDR test after reflective optical system, the fiber lengths due to ONU1 and ONU2 has comparatively significantly difference, then now in light reflected signal except after reflection peak 1, also comprise new reflection peak 2.Next, when carrying out OTDR test after installing reflective optical system for ONU3, fiber lengths due to ONU2 with ONU3 is identical or close, namely the situation of above-mentioned overlapping user group is belonged to, then now still there are in light reflected signal two reflection peaks, wherein reflection peak 1 not change, the amplitude of reflection peak 2 increases, and represents with reflection peak 3.When install for ONU4 carry out OTDR test after reflective optical system, the fiber lengths due to ONU4 and ONU1-ONU3 has comparatively significantly difference, then now in light reflected signal except after reflection peak 1 and reflection peak 3, also comprise new reflection peak 4.When carrying out OTDR test after installing reflective optical system for ONU5, fiber lengths due to ONU5 with ONU4 is identical or close, namely the situation of above-mentioned overlapping user group is belonged to, then now still there are in light reflected signal three reflection peaks, wherein reflection peak 1, reflection peak 3 not change, the amplitude of reflection peak 4 increases, and represents with reflection peak 5.Equally, because ONU6 is identical with the fiber lengths of ONU4 and ONU5 or close, therefore when carrying out OTDR test after installing reflective optical system for ONU6, still there are in light reflected signal three reflection peaks, wherein reflection peak 1, reflection peak 3 not change, the amplitude of reflection peak 5 increases, and represents with reflection peak 6.For brevity, give the light reflected signal obtained when carrying out OTDR test after installing reflective optical system for ONU6 in Figure 5, and the reflection peak 2 obtained in this process, reflection peak 4 and reflection peak 5 are described with dotted line.
Known by above-mentioned process, ONU1 is associated with reflection peak 1, ONU2 and ONU3 is associated with reflection peak 3, and ONU4-ONU6 is associated with reflection peak 6.
If reflective optical system is pulled out, or connect the fiber break of reflective optical system, then the change of corresponding reflection peak is then contrary with situation when installing reflective optical system, 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, when ONU1-ONU6 does not all install reflective optical system, the light reflected signal obtained does not have reflection peak.When carrying out OTDR test after installing reflective optical system for ONU1, light reflected signal comprises reflection peak 1.When install for ONU2 carry out OTDR test after reflective optical system, the fiber lengths due to ONU1 and ONU2 has comparatively significantly difference, then now in light reflected signal except after reflection peak 1, also comprise new reflection peak 2.
Next, when carrying out OTDR test after installing reflective optical system for ONU3, fiber lengths due to ONU2 with ONU3 is identical or close, when an ONU branch optical fiber simultaneously in ONU2 and ONU3 interrupts, then now still there are in light reflected signal two reflection peaks, wherein reflection peak 1 not change, and the amplitude of reflection peak 2 reduces, and represents with reflection peak 31.When install for ONU4 carry out OTDR test after reflective optical system, the fiber lengths due to ONU4 and ONU1-ONU3 has comparatively significantly difference, then now in light reflected signal except after reflection peak 1 and reflection peak 31, also comprise new reflection peak 4.When carrying out OTDR test after installing reflective optical system for ONU5, fiber lengths due to ONU5 with ONU4 is identical or close, namely the situation of above-mentioned overlapping user group is belonged to, then now still there are in light reflected signal three reflection peaks, wherein reflection peak 1, reflection peak 31 not change, the amplitude of reflection peak 4 increases, and represents with reflection peak 5.Equally, because ONU6 is identical with the fiber lengths of ONU4 and ONU5 or close, therefore when carrying out OTDR test after installing reflective optical system for ONU6, still there are in light reflected signal three reflection peaks, wherein reflection peak 1, reflection peak 31 not change, the amplitude of reflection peak 5 increases, and represents with reflection peak 6.For brevity, give the light reflected signal obtained when carrying out OTDR test after installing reflective optical system for ONU6 in figure 6, and the reflection peak 2 obtained in this process, reflection peak 4 and reflection peak 5 are described with dotted line.
According to the feature of the reflection peak amplitude change of installing before and after reflective optical system, this light reflected signal received and the last light reflected signal received can be contrasted, judge whether occur new reflection peak in this light reflected signal.If there is new reflection peak in this light reflected signal, then current user equipment is associated with described new reflection peak, determines that current user equipment is newly-increased ONU equipment.If there is not new reflection peak in this light reflected signal, then search further this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak.When the amplitude of described reflection peak reduces and meets default rule, current user equipment is associated with described reflection peak, determines to there is fault in the ONU equipment be associated with described reflection peak.When the amplitude of described reflection peak increases and meets default rule, current user equipment is associated with described reflection peak, determines that current user equipment is newly-increased ONU equipment.
Fig. 7 is the schematic diagram of a passive optical network fault checkout gear of the present invention embodiment.As shown in Figure 7, passive optical network fault checkout gear comprises:
Receiving element 701, for receiving this light reflected signal as this OTDR test result that OTDR device provides.
ONU equipment wherein one by one for being associated with same PON mouth installs reflective optical system, is being often that after an ONU equipment as current user equipment installs reflective optical system, OTDR device is initiated an OTDR to the ONU equipment be associated with described PON mouth and tested.
Analytic unit 702, for this light reflected signal received and the last light reflected signal received are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak.
Decision unit 703, for the analysis result according to analytic unit 702, when the amplitude of described reflection peak reduces, is associated current user equipment with described reflection peak, determines to there is fault in the ONU equipment be associated with described reflection peak.
Based on the passive optical network fault checkout gear that the above embodiment of the present invention provides, by one by one for the ONU equipment that is associated with same PON mouth installs reflective optical system, be often that after an ONU equipment as current user equipment installs reflective optical system, OTDR device is initiated an OTDR to the ONU equipment be associated with described PON mouth and tested.Receive this light reflected signal as this OTDR test result that OTDR device provides, this light reflected signal received and the last light reflected signal received are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak, when the amplitude of described reflection peak reduces, current user equipment is associated with described reflection peak, determines to there is fault in the ONU equipment be associated with described reflection peak.Change to judge whether ONU equipment exists fault in Event Dead Zone by the reflection peak amplitude comparing the ONU equipment be associated with same PON mouth, thus efficiently solve ubiquitous OTDR Event Dead Zone problem in existing network.
Preferably, current user equipment, also for the analysis result according to analytic unit 702, when the amplitude of described reflection peak increases, is associated with described reflection peak, determines that current user equipment is newly-increased ONU equipment by decision unit 703.
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:
Identification module 801, for this light reflected signal received and the last light reflected signal received being contrasted, judges whether occur new reflection peak in this light reflected signal.
Search module 802, for the judged result according to identification module 801, if there is not new reflection peak in this light reflected signal, then perform search this light reflected signal with on the operation of the reflection peak that amplitude changes in the light reflected signal that once receives.
Preferably, current user equipment, also for the judged result according to identification module 801, if there is new reflection peak in this light reflected signal, is then associated with described new reflection peak by decision unit 703, determines that current user equipment is newly-increased ONU equipment.
Fig. 9 is the schematic diagram of a passive optical network fault detection system of the present invention embodiment.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, test for initiating OTDR to the ONU equipment be associated with same PON mouth, ONU equipment wherein one by one for being associated with same PON mouth installs reflective optical system, be often, after an ONU equipment as current user equipment installs reflective optical system, initiate an OTDR to the ONU equipment be associated with described PON mouth and test; 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 as this OTDR test result that OTDR device provides, this light reflected signal received and the last light reflected signal received are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak, when the amplitude of described reflection peak reduces, current user equipment is associated with described reflection peak, determines to there is fault in the ONU equipment be associated with described reflection peak.
Preferably, passive optical network fault checkout gear 902 is the passive optical network fault checkout gear that in Fig. 7 or Fig. 8, any embodiment relates to.
The present invention passes through the analysis to the reflection peak peak change rule that OTDR receives, the identification of multiple ONU case point in realization event blind area, and the user's branch optical fiber fault in Timeliness coverage Event Dead Zone.
The application compared with prior art, has the following advantages:
1, in the engineering construction stage, the identification problem of overlapping user in Event Dead Zone is solved, without the need to installing tail optical fiber additional to distinguish user; Simultaneously without the need to transforming OLT and ONU equipment, not needing to increase energy test unit, effectively having saved engineering construction improvement cost.
2, at maintenance phase, found the light path fault in Event Dead Zone by the analysis of reflection peak peak change rule, and effectively utilize PONEMS network management alarm information finally to determine fault branch, improve efficiency and the accuracy of failure diagnosis energetically.
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 realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a passive optical network fault detection method, is characterized in that, comprising:
Receive this light reflected signal as this OTDR test result that optical time domain reflectometer OTDR device provides; Optical network unit ONU equipment wherein one by one for being associated with same passive optical network PON mouth installs reflective optical system, be often that after an ONU equipment as current user equipment installs reflective optical system, OTDR device is initiated an OTDR to the ONU equipment be associated with described PON mouth and tested;
This light reflected signal received and the last light reflected signal received are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak;
When the amplitude of described reflection peak reduces, current user equipment is associated with described reflection peak, determines to there is fault in the ONU equipment be associated with described reflection peak.
2. method according to claim 1, is characterized in that:
When 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.
3. method according to claim 1 and 2, is characterized in that:
This light reflected signal received and the last light reflected signal received are contrasted, search this light reflected signal with in the light reflected signal that once receives the step of the reflection peak that amplitude changes comprise:
This light reflected signal received and the last light reflected signal received are contrasted, judges whether occur new reflection peak in this light reflected signal;
If there is not new reflection peak in this light reflected signal, then perform 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, then current user equipment is associated with described new reflection peak, determines 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 as this OTDR test result that optical time domain reflectometer OTDR device provides; Optical network unit ONU equipment wherein one by one for being associated with same passive optical network PON mouth installs reflective optical system, be often that after an ONU equipment as current user equipment installs reflective optical system, OTDR device is initiated an OTDR to the ONU equipment be associated with described PON mouth and tested;
Analytic unit, for this light reflected signal received and the last light reflected signal received are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak;
Decision unit, for the analysis result according to analytic unit, when the amplitude of described reflection peak reduces, is associated current user equipment with described reflection peak, determines to there is fault in the ONU equipment be associated with described reflection peak.
6. device according to claim 5, is characterized in that:
Current user equipment, also for the analysis result according to analytic unit, when the amplitude of described reflection peak increases, is associated with described reflection peak, determines that current user equipment is newly-increased ONU equipment by decision unit.
7. the device according to claim 5 or 6, is characterized in that:
Analytic unit comprises identification module and searches module, wherein:
Identification module, for this light reflected signal received and the last light reflected signal received being contrasted, judges whether occur new reflection peak in this light reflected signal;
Search module, for the judged result according to identification module, if there is not new reflection peak in this light reflected signal, then perform 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:
Current user equipment, also for the judged result according to identification module, if there is new reflection peak in this light reflected signal, is then associated with described new reflection peak by decision unit, determines 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, test for initiating OTDR to the optical network unit ONU equipment be associated with same passive optical network PON mouth, ONU equipment wherein one by one for being associated with same PON mouth installs reflective optical system, be often, after an ONU equipment as current user equipment installs reflective optical system, initiate an OTDR to the ONU equipment be associated with described PON mouth and test; 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 as this OTDR test result that OTDR device provides, this light reflected signal received and the last light reflected signal received are contrasted, search this light reflected signal with on amplitude changes in the light reflected signal that once receives reflection peak, when the amplitude of described reflection peak reduces, current user equipment is associated with described reflection peak, determines to there is fault in the ONU equipment be associated with described reflection peak.
10. system according to claim 9, is characterized in that:
The passive optical network fault checkout gear that passive optical network fault checkout gear relates to any one of claim 5-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310170697.2A CN103905112B (en) | 2012-12-26 | 2013-05-10 | passive optical network fault detection method, device and system |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210572804X | 2012-12-26 | ||
| CN201210572804 | 2012-12-26 | ||
| CN201210572804.X | 2012-12-26 | ||
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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 |
| CN107084833A (en) * | 2017-05-04 | 2017-08-22 | 薛鹏 | Diagnostic optical fiber method and system based on fiber optic wavelength matrix |
| CN108512592B (en) * | 2018-04-13 | 2020-12-29 | 国网山西省电力公司信息通信分公司 | Optical cable interruption type diagnosis system and method based on breakpoint graph feature points |
| CN110474678B (en) * | 2019-08-22 | 2021-06-01 | 华为技术有限公司 | Method and system for acquiring optical fiber code and related equipment |
| CN111010228B (en) * | 2019-11-19 | 2023-01-13 | 华为技术有限公司 | Port identification method, device and system and optical splitter |
| 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 |
| 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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