CN102055523A - Method, equipment and system for diagnosing failure of passive optical network - Google Patents
Method, equipment and system for diagnosing failure of passive optical network Download PDFInfo
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- CN102055523A CN102055523A CN2009102370394A CN200910237039A CN102055523A CN 102055523 A CN102055523 A CN 102055523A CN 2009102370394 A CN2009102370394 A CN 2009102370394A CN 200910237039 A CN200910237039 A CN 200910237039A CN 102055523 A CN102055523 A CN 102055523A
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Abstract
The invention discloses a method, equipment and a system for diagnosing a failure of a passive optical network (PON). The method comprises the steps of: pre-obtaining identification information of each ONU (Optical Network Unit) in the PON, optical fiber link physical distance and the corresponding peak information of the ONU when the PON is normal; establishing a correspondence table of the identification information and the corresponding peak information of each ONU according to the obtained identification information and the physical distance parameter information of each ONU and the optical fiber link physical distance and the corresponding peak information of the ONU; obtaining corresponding peak information of optical fiber links of all current ONUs in the PON according to the preset failure diagnosis measure; matching the corresponding peak information of the current optical fiber link with the pre-stored leak information, and if corresponding peak position and/or amplitude changes, obtaining the identification information of the ONU corresponding to the changed peak according to the correspondence table; and if not, executing the equipment failure diagnosis. By applying the invention, the failure position can be immediately found and positioned, the failure maintenance time is shortened and the failure detection efficiency is improved.
Description
Technical field
The present invention relates to EPON (PON, Passive Optical Network) technology, particularly a kind of method, equipment and system that diagnoses the PON fault.
Background technology
In today of globalization development, the variation of people's work and life and the universalness of information interchange have made broadband access network become inalienable part in people's life.This has greatly promoted broadband access technology to develop to wideer direction faster.In recent years, along with the PON with passive environmentally-friendly energy conservation characteristic substitutes existing copper wire access technology, PON has become the optimal broadband access technology that satisfies people's demand.
After carrying out a large amount of PON arrangements and disposing, operator need consider operation and the maintenance of this PON, particularly timely detection, diagnosis and the location of PON fault, to make the attendant find fault quickly and efficiently and in time safeguard, ensure the reliability of people's broadband access communication and the service quality of PON.
Fig. 1 is existing PON system configuration schematic diagram, referring to Fig. 1, this system mainly comprises: optical line terminal (OLT, Optical Line Terminal), optical distribution (ODN, Optical Distribution Network) and optical network unit (ONU, Optical Network Unit), wherein, ODN one end links to each other with OLT, and the other end can link to each other with one or more ONU, be the optical transmission physical channel between OLT and the ONU, form by optical fiber, optical connector, optical branching device usually.Fibre circuit between OLT and the ONU is called the main fiber circuit, and the fibre circuit between ODN and the ONU is called the branch optical fiber circuit.
In the prior art, the PON fault generally is divided into two classes, one class is equipment fault, comprise OLT fault and ONU fault, wherein, it mainly is again the optical module fault among OLT and the ONU, for example, luminous power in the optical module, operating current, abnormal parameters such as working temperature and bias voltage, and the optical module fault that can not the normal turn-off optical module etc. causes, to such equipment fault problem, OLT has fast detecting and diagnostic function, that is to say, various parameters and state for optical module among OLT and the ODN all have corresponding state machine and instruct corresponding with it, if mistake appears in state machine, perhaps instruction can not correct execution and feedback information, and then OLT can think that local optical module goes wrong; And, can and report and realize by the management channels communication between OLT and the ONU for the optical module failure problems of opposite end ONU.Detection that above-mentioned OLT has and diagnostic function specifically can not repeat them here referring to the correlation technique document.
The another kind of of PON fault is optical-fiber line fault among the PON, fault to this class, OLT does not have measuring ability, generally at central office OLT place with a light path detecting instrument, be that optical time domain reflectometer (OTDR, Optical Time Domain Reflectometer) detects fibre circuit among the whole PON.The backscattering that Rayleigh scattering when OTDR utilizes light wave to transmit in optical fiber and Fresnel reflection are produced and the electrical integrated instrument of precise light made, be widely used in to carry out the measurement of fiber lengths, transmission attenuation, joint decay and fault location etc. in the maintenance, construction of fibre circuit.Its course of work is briefly described below: by launching light pulse in optical fiber, receive the information of returning (hereinafter referred to as the OTDR measuring-signal) at the OTDR port then, the information that the ONU of different distance returns presents different spikes and arranges in regular turn in instrument in the instrument of OTDR, calculating is from launching light pulse to the used time of return information, according to the speed of light in the optical fiber material, just can calculate OTDR again to the distance between the equipment of reflection light pulse.
Like this, the step that OTDR detects optical-fiber line fault among the PON can be described as follows: when the fibre circuit between OTDR and ONU does not have fault (overwhelming majority times all are in normal condition), obtain in advance information that ONU returns in the instrument of OTDR spike and write down the position or the storage spike information at spike place; When whether definite fibre circuit breaks down, by sending light pulse once more, obtain the spike information of the information correspondence that ONU returns, the spike information of this spike information with storage is in advance compared, mates, if both mate fully, show that then this fibre circuit does not have fault, if peak location is offset or, peak amplitude changes, and shows that then there is fault in this fibre circuit.
But along with the increase of splitting ratio among the PON, and the high loss of ODN, make the reflected signal that generally is difficult to measure the branch optical fiber circuit at office side OTDR place.A technology relatively more commonly used is exactly to increase a linear filter sheet at each ONU place, this linear filter sheet adopts film filter plate (TFF, Thin-Film Filter), this TFF has to the light-wave transmission below the OTDR wavelength, to the characteristics of the light more than OTDR wavelength reflection, specifically, TFF like this, generally can increase the gain of 6 decibels (dB) to the reflection of the light more than the 1625nm wavelength.By adopting this filter plate, add high-resolution OTDR instrument, so just in the instrument of machine room OTDR, can see the OTDR measuring-signal that the later branch optical fiber line reflection of optical splitter of ODN is returned.
Fig. 2 is observed OTDR measuring-signal schematic diagram in the existing instrument that adopts OTDR behind the TFF, referring to Fig. 2, in this schematic diagram, comprise an OLT, an ODN and four branch optical fiber circuits, corresponding optical network unit is respectively: ONU1, ONU2, ONU3, ONU4, each spike is corresponding to a corresponding branch optical fiber circuit, and the actual physics distance of corresponding each ONU to OLT PON mouth is distinguished in four positions of spikes on schematic diagram, and sorts apart from length according to actual physics.High-resolution OTDR instrument makes that physical distance also can be differentiated between these spikes in the time of two meters.Thereby, at first when main fiber circuit and branch optical fiber circuit do not have fault, obtain spike information as shown in Figure 2, in subsequent detection, if the spike information as shown in Figure 2 of spike information of obtaining once more and storage is offset, then can determine the branch optical fiber line failure of this spike correspondence.
By as seen above-mentioned, because the light pulse of using among the OTDR only is a branch of light wave, can't carry particular user information (ONU) and specify detection, when between ODN and ONU, only having a branch optical fiber circuit, can be according to the spike information of storage in advance and the spike information obtained when detecting detect out of order occurrence positions; But when having many branch optical fiber circuits between ODN and the ONU, spike sorts apart from length according to actual physics, and do not store the concrete branch optical fiber circuit of this concrete physical distance correspondence among the OTDR, that is to say, ONU is when returning the OTDR measuring-signal, owing to can't carry particular user information, after obtaining spike information in advance, can only sort apart from length according to actual physics, can not determine the concrete corresponding actual particular user of the spike that sorts apart from length according to actual physics, thereby, can only determine among corresponding respectively four the concrete ONU of four spikes, be ONU1 shown in Figure 2, ONU2, ONU3, the ONU4 numbering just schematically, and is irrelevant with concrete ONU numbering or sign.For instance, suppose to determine that through fault ONU2 is offset among Fig. 2, but how corresponding ONU2 is with the ONU of actual fiber circuit, from above-mentioned spike information shown in Figure 2, can not obtain, in the practical application, also need four branch optical fiber circuits are detected one by one, analyze, determined the branch optical fiber circuit that specifically breaks down.Thereby corrective maintenance time is grown, can not in time be found and the fault location position, makes efficiency of failure defection lower, influences PON service quality.
Summary of the invention
In view of this, main purpose of the present invention is to propose a kind of method of the PON of diagnosis fault, in time discovery and fault location position, shortening corrective maintenance time, raising efficiency of failure defection.
Another object of the present invention is to propose a kind of system of the PON of diagnosis fault, in time discovery and fault location position, shortening corrective maintenance time, raising efficiency of failure defection.
A further object of the present invention is to propose a kind of equipment of the PON of diagnosis fault, in time discovery and fault location position, shortening corrective maintenance time, raising efficiency of failure defection.
For achieving the above object, the invention provides a kind of method of the PON of diagnosis fault, this method comprises: identification information and the logical physical distance parameter information of obtaining each optical network unit ONU of PON port; The fibre circuit that obtains PON port correspondence is the fibre circuit physical distance information of each ONU just often; According to the identification information of each ONU that obtains and logical physical distance parameter information and, the fibre circuit physical distance information of fibre circuit each ONU just often among the PON that obtains is set up the corresponding relation of the fibre circuit physical distance of the identification information of each ONU and corresponding each ONU;
Obtain the fibre circuit physical distance information of each ONU of current fibre circuit among the PON;
Mate the fibre circuit physical distance of corresponding each ONU of current fibre circuit and the fibre circuit physical distance information of circuit each ONU just often, determine whether to occur fiber failure.
Describedly determine whether that fiber failure occurring comprises: if the peak location of the fibre circuit physical distance information correspondence of the ONU of current fibre circuit and/or, the spike of the fibre circuit physical distance information correspondence of the relative respective stored of amplitude changes, and obtains the identification information of ONU of the spike correspondence of this variation according to described corresponding relation; If corresponding peak location and amplitude all do not change, the actuating equipment failure diagnosis.
Carry out registration process by each ONU among the PON and obtain the identification information of each ONU among the described PON and the parameter information of related physical distance.
The step of the fibre circuit physical distance of fibre circuit each ONU just often and corresponding spike information comprises among the described PON of obtaining:
Optical time domain reflectometer OTDR emission light pulse receives the information of returning at the OTDR port then in optical fiber, calculate from launching light pulse to the used time of return information, again according to the speed of light in the optical fiber material, calculates described fibre circuit physical distance; The information of returning according to the ONU of different distance presents different spikes and arranges according to the position of different physical distances in instrument in the instrument of OTDR, obtain the described corresponding spike information that comprises position and amplitude.
Described predefined Fault Diagnosis Strategy comprises the warning message that receives the user, starts failure diagnosis; Or
According to predefined time cycle startup failure diagnosis.
Store forward error correction FEC threshold value in advance, described predefined Fault Diagnosis Strategy comprises: the FEC value of branch's light circuit of each ONU of optical line terminal OLT statistical computation among the PON, if the FEC value that statistics obtains surpasses the FEC threshold value of storage in advance, start failure diagnosis.
The step of described actuating equipment failure diagnosis comprises:
The instruction of OLT and each ONU transmitting apparatus failure diagnosis receives the equipment fault diagnosis object information that returns in PON, compares with the equipment fault parameter threshold of storage in advance and determines relevant equipment fault.
Described equipment fault parameter threshold comprises: luminous power parameter threshold, operating current parameter threshold, working temperature parameter threshold and bias voltage parameter threshold.
A kind of system that diagnoses the passive optical network PON fault, this system comprises: equipment fault diagnosis module, optical-fiber line fault diagnostic module and failure diagnosis control module, wherein,
Equipment fault diagnosis information gathering module is used to obtain the identification information and the logical physical distance parameter information of each optical network unit ONU of PON port, issues the failure diagnosis control module;
The optical-fiber line fault diagnostic module is used to obtain the detecting information of fibre circuit of each ONU of PON port correspondence, issues the failure diagnosis control module;
The failure diagnosis control module, be used for fibre circuit physical distance information according to the identification information of each ONU of obtaining and logical physical distance parameter information and PON fibre circuit each ONU just often of obtaining, set up the corresponding relation of the fibre circuit physical distance of the identification information of each ONU and corresponding each ONU, and mate the fibre circuit physical distance of corresponding each ONU of current fibre circuit and the fibre circuit physical distance information of circuit each ONU just often, determine whether to occur fiber failure.
Described failure diagnosis control module is according to predefined Fault Diagnosis Strategy, send the optical-fiber line fault diagnostic instruction to the optical-fiber line fault diagnostic module, the peak location of the current fibre circuit physical distance information correspondence that coupling receives and/or, the spike of the fibre circuit physical distance information correspondence of the relative respective stored of amplitude changes, if corresponding peak location and/or, amplitude changes, and obtains the identification information of ONU of the spike correspondence of this variation according to described corresponding relation; If corresponding peak location and amplitude all do not change, the actuating equipment failure diagnosis determines whether to occur fiber failure.
Described failure diagnosis control appliance obtains fibre circuit fibre circuit physical distance and corresponding spike information just often among the PON by identification information and physical distance parameter information that EMS or network management system NMS obtain each ONU among the PON by EMS.
Described failure diagnosis control appliance comprises: log-on message memory module, spike information storage module, mapping table memory module, Fault Diagnosis Strategy module, equipment fault parameter threshold memory module, equipment fault diagnosis module and optical-fiber line fault diagnostic module, wherein
The log-on message memory module is used for storing identification information and the physical distance parameter information of each ONU of PON that obtains;
The spike information storage module, the fibre circuit physical distance and the corresponding spike information that are used for storing PON fibre circuit each ONU just often that obtains;
The mapping table memory module, according to the identification information of each ONU of log-on message memory module storage and physical distance parameter information and, fibre circuit fibre circuit physical distance and corresponding spike information just often among the PON of spike information storage module storage is set up the identification information of each ONU and the mapping table of corresponding spike information;
The Fault Diagnosis Strategy module is used for storage failure diagnosis strategy, when satisfying Fault Diagnosis Strategy, sends the fibre circuit diagnostic instruction to the optical-fiber line fault diagnostic module;
Equipment fault parameter threshold memory module is used for memory device fault parameter threshold value;
The equipment fault diagnosis module is used for the instruction of receiving equipment failure diagnosis, is sent to equipment fault diagnosis equipment; The equipment fault diagnosis object information that the receiving equipment failure diagnosis apparatus returns, the equipment fault parameter threshold of storing with equipment fault parameter threshold memory module compares definite equipment fault;
The optical-fiber line fault diagnostic module is used to receive the optical-fiber line fault diagnostic instruction, is sent to the optical-fiber line fault diagnostic device; The corresponding spike information of the current fibre circuit that reception optical-fiber line fault diagnostic device returns, mate with the fibre circuit corresponding spike information just often of spike information storage module storage, if corresponding peak location and/or, amplitude changes, and obtains the identification information of ONU of the spike correspondence of this variation from the mapping table memory module; Otherwise, instruct to equipment fault diagnosis module transmitting apparatus failure diagnosis.
A kind of equipment of diagnosing the passive optical network PON fault, this equipment comprises: log-on message memory module, spike information storage module, mapping table memory module, Fault Diagnosis Strategy module, equipment fault parameter threshold memory module, equipment fault diagnosis module and optical-fiber line fault diagnostic module, wherein
The log-on message memory module is used for storing the identification information and the physical distance parameter information of each optical network unit ONU of PON of obtaining;
The spike information storage module is used for storing PON fibre circuit fibre circuit physical distance and the corresponding spike information of obtaining just often;
The mapping table memory module, according to the identification information of each ONU of log-on message memory module storage and physical distance parameter information and, fibre circuit fibre circuit physical distance and corresponding spike information just often among the PON of spike information storage module storage is set up the identification information of each ONU and the mapping table of corresponding spike information;
The Fault Diagnosis Strategy module is used for storage failure diagnosis strategy, when satisfying Fault Diagnosis Strategy, sends the fibre circuit diagnostic instruction to the optical-fiber line fault diagnostic module;
Equipment fault parameter threshold memory module is used for memory device fault parameter threshold value;
The equipment fault diagnosis module is used for the instruction of receiving equipment failure diagnosis, is sent to equipment fault diagnosis equipment; The equipment fault diagnosis object information that the receiving equipment failure diagnosis apparatus returns, the equipment fault parameter threshold of storing with equipment fault parameter threshold memory module compares definite equipment fault;
The optical-fiber line fault diagnostic module is used to receive the optical-fiber line fault diagnostic instruction, is sent to the optical-fiber line fault diagnostic device; The corresponding spike information of the current fibre circuit that reception optical-fiber line fault diagnostic device returns, mate with the fibre circuit corresponding spike information just often of spike information storage module storage, if corresponding peak location and/or, amplitude changes, and obtains the identification information of ONU of the spike correspondence of this variation from the mapping table memory module; Otherwise, instruct to equipment fault diagnosis module transmitting apparatus failure diagnosis.
Described spike information storage module is stored physical distance and corresponding spike information in illustrated mode.
Described equipment fault parameter threshold comprises: luminous power parameter threshold, operating current parameter threshold, working temperature parameter threshold and bias voltage parameter threshold, and described equipment fault diagnosis object information comprises: luminous power, operating current, working temperature and bias voltage;
Described equipment fault diagnosis module, the luminous power that the receiving equipment failure diagnosis apparatus returns, operating current, working temperature and bias voltage information, carry out corresponding the comparison with luminous power parameter threshold, operating current parameter threshold, working temperature parameter threshold and the bias voltage parameter threshold of the storage of equipment fault parameter threshold memory module, if determine to exceed corresponding parameter threshold, determine that there is fault in equipment.
As seen from the above technical solutions, a kind of method, equipment and system that diagnoses the PON fault provided by the invention obtains the identification information and the physical distance parameter information of each optical network unit ONU among the PON in advance; Obtain fibre circuit fibre circuit physical distance and corresponding spike information just often among the PON in advance; According to the identification information of each ONU that obtains and physical distance parameter information and, fibre circuit fibre circuit physical distance and corresponding spike information is just often set up the identification information of each ONU and the mapping table of corresponding spike information among the PON that obtains; According to predefined Fault Diagnosis Strategy, obtain the corresponding spike information of current fibre circuit among the PON; Mate the corresponding spike information of current fibre circuit and the fibre circuit corresponding spike information just often of storage in advance, if corresponding peak location and/or, amplitude changes, and obtains the identification information of ONU of the spike correspondence of this variation according to mapping table; If corresponding peak location and amplitude all do not change, the actuating equipment failure diagnosis.Like this, in failure diagnosis, if determined is that change has taken place for which peak location or amplitude, just can be according to the corresponding relation of spike and ONU, obtain the ONU sign of this spike correspondence, thereby notify the attendant that the branch optical fiber circuit of this ONU sign is safeguarded, can in time find with the fault location position, shorten corrective maintenance time, improve efficiency of failure defection and reduce maintenance cost.
Description of drawings
Fig. 1 is existing PON system configuration schematic diagram.
Fig. 2 is observed OTDR measuring-signal schematic diagram in the existing instrument that adopts OTDR behind the TFF.
Fig. 3 is the method flow schematic diagram of embodiment of the invention diagnosis PON fault.
Fig. 4 is the system configuration schematic diagram of embodiment of the invention diagnosis PON fault.
Fig. 5 is an embodiment of the invention failure diagnosis control appliance structural representation.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
In the prior art, each ONU is after finishing installation, and its physical location is fixed, and, each ONU need carry out registration process before the machine service operation among the PON in PON on entering, to determine that different ONU can not produce conflict by time division multiplexing mechanism when carrying out transmitting uplink data.In the registration process of this ONU, ONU and OLT carry out a range finding step, promptly measure ONU to the physical distance between the OLT by logical means, OLT dispatches the up transmission delay of this ONU according to the range finding result, with avoid different ONU have same physical apart from the time, the conflict that when carrying out transmitting uplink data, produces by time division multiplexing mechanism.About measuring ONU to the physical distance between the OLT, specifically can not repeat them here referring to IEEE 802.3ah standard and standard G.984.3 by logical means.
Thereby, in the embodiment of the invention, can utilize each ONU physical distance parameter that the execution registration process is obtained before the machine service operation on entering among the PON, in OTDR, set up this ONU sign and this ONU corresponding relation in advance to physical distance between the OLT, thereby, after OTDR obtains the spike information of branch optical fiber circuit and calculates the physical distance of this spike, according to the ONU sign of in OTDR, setting up in advance and this ONU corresponding relation, can set up the corresponding relation of corresponding spike and ONU to physical distance between the OLT.Like this, in failure diagnosis, if determined it is that change has taken place for which peak location or amplitude, just can be according to the corresponding relation of spike and ONU, obtain the ONU sign of this spike correspondence, thereby notify the attendant that the branch optical fiber circuit of this ONU sign is safeguarded.
As previously mentioned, ONU different among the PON may have identical physical distance, because high-resolution OTDR instrument can be differentiated physical distance each spike in the time of two meters, and in the practical application, the situation of physical distance difference in two meters that different ONU occur is fewer, if have, then the corresponding a plurality of ONU of this same physical distance parameter identify, in follow-up, when peak location on determining this physical distance or amplitude change, also the branch optical fiber circuit that only need identify a plurality of ONU of this same physical distance parameter correspondence is safeguarded, and does not need branch optical fiber circuits all among this PON is safeguarded.This will help operator's discovery in time and fault location position greatly, will shorten the time of operator's trouble hunting, reduce maintenance cost, improve efficiency of failure defection.
Based on foregoing description, diagnose method, equipment and the system of PON fault to describe respectively to the present invention below.
Fig. 3 is the method flow schematic diagram of embodiment of the invention diagnosis PON fault, and referring to Fig. 3, this flow process comprises:
Step 301 is obtained identification information and the physical distance parameter information of each ONU among the PON in advance;
In this step, the registration process that the flow process of obtaining is carried out before the machine service operation on entering with each ONU among the aforementioned PON.The physical distance parameter information is represented the physical distance of this ONU to OLT.
Because optical pulse information can not carry the identification information of ONU, thereby the log-on message of ONU can be by manual mode input and storage.
Step 302 is obtained fibre circuit fibre circuit physical distance and corresponding spike information just often among the PON in advance;
In this step, obtain fibre circuit physical distance and corresponding spike information by OTDR, the fibre circuit physical distance comprises main fiber circuit physical distance and branch optical fiber circuit physical distance.
OTDR obtains the fibre circuit physical distance and corresponding spike information is by launching light pulse in optical fiber, receiving the information of returning at the OTDR port then and carry out.When light pulse is transmitted, can produce scattering, reflection owing to character and connector, junction point, bending or other similar incident of optical fiber itself in optical fiber.Wherein Yi Bufen scattering and reflection will turn back among the OTDR, and the useful information that returns is measured by the detector of OTDR, can be used as time or the curve segment on the interior diverse location of optical fiber and are shown as spike.To the used time of inverse signal, determine the speed of light in the optical fiber material from the emission light pulse signal again, just can calculate the fibre circuit physical distance, suc as formula (1).
In the formula,
D is the fibre circuit physical distance;
C is a light speed in a vacuum;
T is that the emission light pulse signal arrives the used time of inverse signal, i.e. the round-trip delay time (RTD:Round Trip Delay), for the ONU of different distance OLT, RTD is directly proportional with the distance of OLT to ONU, and each ONU has the RTD of correspondence oneself.If there are two ONU that identical RTD is just in time arranged, OLT adds that an equivalent postpones (EqD can for one of them RTD so, Equalization Delay), so just can guarantee that each ONU has unique RTD, to be used for OLT to the foundation that the last line time of ONU carries out the branch timing, the upstream data that makes each ONU send does not conflict.
I
ORIt is optical fibre refractivity.
It should be noted that there is not inevitable sequencing between step 301 and the step 302, that is to say that step 302 can be carried out before step 301.
In this step, if the fibre circuit physical distance of each ONU that fibre circuit just often obtains among the physical distance of obtaining in the registration process and the PON is identical, then set up the corresponding relation of the identification information of ONU of the physical distance correspondence of obtaining in the registration process spike information corresponding, and form mapping table by each corresponding relation with this fibre circuit physical distance.
Institute it should be noted that, step 301 to step 303 is not all to need to carry out when each diagnosis PON fault, step 301 to step 303 a needs execution once, promptly in execution in step 301 to step 303, during the consequent malfunction diagnosis, directly from mapping table, read relevant information.
Step 304 according to predefined Fault Diagnosis Strategy, is obtained the corresponding spike information of current fibre circuit among the PON;
In this step, predefined Fault Diagnosis Strategy can be the warning message that receives the user, or according to predefined time cycle startup failure diagnosis.
Warning message mainly comes from User Alarms, comprises that network has information such as fault or service interruption be smooth, at this moment, needs to start the flow process of tracing trouble.
The flow process of obtaining the corresponding spike information of the fibre circuit of current fibre circuit among the PON is identical with step 302.Owing to comprised the fibre circuit range information of current fibre circuit in the spike information of obtaining, thereby, the correlation step of fibre circuit distance do not calculated in the execution in step 302.
In this step, if the corresponding spike information of current fibre circuit is not complementary with the fibre circuit corresponding spike information just often of storage in advance, show that current fibre circuit has fault, situation about not being complementary comprises: corresponding peak location and/or, amplitude changes.
Step 306 is obtained the identification information of ONU of the spike correspondence of this variation according to mapping table.
In this step, obtain the identification information of ONU of spike correspondence of variation after, operator just can find and the fault location position, has promptly determined the branch optical fiber circuit that breaks down.Like this, only need safeguard at this actual branch optical fiber circuit that breaks down, and do not need from all branch optical fiber circuits, to diagnose one by one again with the fault location position, corrective maintenance time is short, fault detect efficient height, and reduced attendant's resource overhead effectively, reduced maintenance cost.
In the practical application, as previously mentioned, the PON fault generally is divided into equipment fault and optical-fiber line fault two classes, thereby in the embodiment of the invention, after determining optical-fiber line fault, all right execution in step 307 is to determine whether to exist simultaneously equipment fault.
In this step, the actuating equipment failure diagnosis is identical with prior art, at this, only luminous power, operating current, working temperature and four parameter diagnosises of bias voltage that relate in the equipment fault diagnosis is described.
The luminous power parameter: if under the normal situation of other Several Parameters, luminous power might be that the optical module device aging causes unusually, if influence operate as normal, this module must be replaced so.
The operating current parameter: linear with luminous power, the variation of operating current will directly influence luminous power, make this parameter in normal scope, and the operate as normal that guarantees system is very helpful.
The working temperature parameter: the variation of working temperature has very big relation to the operation wavelength of optical module, considers cost, and attemperating unit generally is not set in the existing optical module.If wave length shift exceeds normal working range and influences operate as normal, and working temperature is normal words, can determine that then optical module has unusual necessary replacing.
Bias voltage parameter: be also referred to as threshold voltage, the critical voltage that the major control laser can bright dipping.If this value changes, generally bigger than normal, this is actually the beginning of laser ageing, if excessive, optical module must be changed so.
Whether according to above four parameters, whether OLT can unusual to optical module, have fault to make rapid judgement.
In the practical application, OLT can also utilize the statistical information of forward error correction FEC (Forward Error Correction) initiatively to start fault diagnosis flow scheme, OLT carries out the statistical computation of FEC to branch's light circuit of each ONU, the FEC that calculating FEC correct frequency accounts for total statistical number leads, if FEC leads above predefined FEC and leads threshold value, then show and have equipment fault or optical-fiber line fault, thereby the startup fault diagnosis flow scheme, i.e. corresponding spike information of the fibre circuit of current fibre circuit or actuating equipment failure diagnosis among the PON are obtained in indication.
In the practical application, optical-fiber line fault and equipment fault do not have the branch of sequencing yet, can first actuating equipment failure diagnosis, when there is not fault in definite equipment, carry out the optical-fiber line fault diagnosis again.
In the practical application, above-mentioned steps 301 to step 307 also can be:
Obtain the identification information and the logical physical distance parameter information of each optical network unit ONU of PON port;
The fibre circuit that obtains PON port correspondence is the fibre circuit physical distance information of each ONU just often;
According to the identification information of each ONU that obtains and logical physical distance parameter information and, the fibre circuit physical distance information of fibre circuit each ONU just often among the PON that obtains is set up the corresponding relation of the fibre circuit physical distance of the identification information of each ONU and corresponding each ONU;
Obtain the fibre circuit physical distance information of each ONU of current fibre circuit among the PON;
Mate the fibre circuit physical distance of corresponding each ONU of current fibre circuit and the fibre circuit physical distance information of circuit each ONU just often, determine whether to occur fiber failure.
Fig. 4 is the system configuration schematic diagram of embodiment of the invention diagnosis PON fault, referring to Fig. 4, this fault diagnosis system (FDS, Fault Diagnostic System) comprising: equipment fault diagnosis module, optical-fiber line fault diagnostic module and failure diagnosis control module, wherein
Equipment fault diagnosis information gathering module is used to obtain the identification information and the logical physical distance parameter information of each optical network unit ONU of PON port, issues the failure diagnosis control module;
The optical-fiber line fault diagnostic module is used to obtain the detecting information of fibre circuit of each ONU of PON port correspondence, issues the failure diagnosis control module;
The failure diagnosis control module, be used for fibre circuit physical distance information according to the identification information of each ONU of obtaining and logical physical distance parameter information and PON fibre circuit each ONU just often of obtaining, set up the corresponding relation of the fibre circuit physical distance of the identification information of each ONU and corresponding each ONU, and mate the fibre circuit physical distance of corresponding each ONU of current fibre circuit and the fibre circuit physical distance information of circuit each ONU just often, determine whether to occur fiber failure.
The failure diagnosis control module is according to predefined Fault Diagnosis Strategy, send the optical-fiber line fault diagnostic instruction to the optical-fiber line fault diagnostic module, the peak location of the current fibre circuit physical distance information correspondence that coupling receives and/or, the spike of the fibre circuit physical distance information correspondence of the relative respective stored of amplitude changes, if corresponding peak location and/or, amplitude changes, and obtains the identification information of ONU of the spike correspondence of this variation according to described corresponding relation; If corresponding peak location and amplitude all do not change, the actuating equipment failure diagnosis determines whether to occur fiber failure.
Specifically, the equipment fault diagnosis module, be used to receive the equipment fault diagnosis instruction that the failure diagnosis control module sends, Element management system (EMS by the outside, Element Management System) sends the equipment fault diagnosis instruction to relevant OLT and affiliated ONU thereof, receive OLT by the equipment fault diagnosis object information that EMS returns, be sent to the failure diagnosis control module;
The optical-fiber line fault diagnostic module, be used to receive the optical-fiber line fault diagnostic instruction that the failure diagnosis control module sends, EMS by the outside sends the optical-fiber line fault diagnostic instruction to relevant OTDR, OLT and the ONU under the OLT, receive the optical-fiber line fault diagnostic result information of the corresponding spike information of carrying current fibre circuit among the PON that OTDR returns by EMS, be sent to the failure diagnosis control module;
The failure diagnosis control module, be used for obtaining in advance identification information and the physical distance parameter information of each ONU of PON, and obtain fibre circuit fibre circuit physical distance and corresponding spike information just often among the PON in advance, according to the identification information of each ONU that obtains and physical distance parameter information and, fibre circuit fibre circuit physical distance and corresponding spike information is just often set up the identification information of each ONU and the mapping table of corresponding spike information among the PON that obtains; Memory device fault parameter threshold value in advance;
According to predefined Fault Diagnosis Strategy, send the optical-fiber line fault diagnostic instruction to the optical-fiber line fault diagnostic module, the corresponding spike information of the current fibre circuit that coupling receives and the fibre circuit corresponding spike information just often of storing in advance, if corresponding peak location and/or, amplitude changes, and obtains the identification information of ONU of the spike correspondence of this variation according to mapping table; Otherwise, to the instruction of equipment fault diagnosis module transmitting apparatus failure diagnosis, receive the equipment fault diagnosis object information that returns, compare definite equipment fault with the equipment fault parameter threshold of storing in advance.
In the practical application, the failure diagnosis control module can be passed through EMS or network management system (NMS, Network Management System) obtains identification information and the physical distance parameter information of each ONU among the PON, obtain fibre circuit fibre circuit physical distance and corresponding spike information just often among the PON by EMS.
Certainly, also can obtain identification information and the physical distance parameter information of each ONU among the PON by EMS or NMS and store by the equipment fault diagnosis module; Obtain fibre circuit physical distance and corresponding spike information and the storage of fibre circuit each ONU just often among the PON by EMS by the optical-fiber line fault diagnostic module.Then, when the failure diagnosis control module receives the corresponding spike information of current fibre circuit, the failure diagnosis control module reinforms identification information and the physical distance parameter information that the equipment fault diagnosis module reports each ONU among the PON, notice optical-fiber line fault diagnostic module reports fibre circuit fibre circuit physical distance and corresponding spike information just often among the PON, and the information that reports according to equipment fault diagnosis module and optical-fiber line fault diagnostic module is set up the mapping table of the identification information of each ONU and corresponding spike information and carried out follow-up coupling.
In the present embodiment, the failure diagnosis control module can generate relevant alarm or maintenance instructions, and report to EMS or NMS after the concrete fault in location.
In describing above, the structure of corresponding EMS or NMS is identical among the structure of EMS or NMS and the existing PON, does not repeat them here.
Again the failure diagnosis control module of the embodiment of the invention is described below.
Fig. 5 is embodiment of the invention failure diagnosis control module (equipment) structural representation, referring to Fig. 5, this failure diagnosis control appliance comprises: log-on message memory module, spike information storage module, mapping table memory module, Fault Diagnosis Strategy module, equipment fault parameter threshold memory module, equipment fault diagnosis module and optical-fiber line fault diagnostic module, wherein
The log-on message memory module is used for storing identification information and the physical distance parameter information of each ONU of PON that obtains;
In the present embodiment, the manual input of physical distance parameter information that the related personnel of operator will obtain when ONU registers and the identification information of this ONU.
The spike information storage module is used for storing PON fibre circuit fibre circuit physical distance and the corresponding spike information of obtaining just often;
In the present embodiment, the physical distance and the corresponding spike information of the storage of spike information storage module generally exist in illustrated mode.
The mapping table memory module, according to the identification information of each ONU of log-on message memory module storage and physical distance parameter information and, fibre circuit fibre circuit physical distance and corresponding spike information just often among the PON of spike information storage module storage is set up the identification information of each ONU and the mapping table of corresponding spike information;
The Fault Diagnosis Strategy module is used for storage failure diagnosis strategy, when satisfying Fault Diagnosis Strategy, sends the fibre circuit diagnostic instruction to the optical-fiber line fault diagnostic module;
Fault Diagnosis Strategy comprises user's warning message and the predefined time cycle, like this, according to predefined time cycle startup failure diagnosis, can obtain the PON running status, is convenient to grasp the PON communication conditions.
Equipment fault parameter threshold memory module is used for memory device fault parameter threshold value;
The equipment fault parameter threshold comprises: luminous power parameter threshold, operating current parameter threshold, working temperature parameter threshold and bias voltage parameter threshold.
In the present embodiment, can upgrade canned data in log-on message memory module, spike information storage module, Fault Diagnosis Strategy module and the equipment fault parameter threshold memory module, to satisfy different other needs of diagnosis level, increase the flexibility of failure diagnosis.
The equipment fault diagnosis module is used for the instruction of receiving equipment failure diagnosis, is sent to equipment fault diagnosis equipment; The equipment fault diagnosis object information that the receiving equipment failure diagnosis apparatus returns, the equipment fault parameter threshold of storing with equipment fault parameter threshold memory module compares definite equipment fault;
In the present embodiment, the equipment fault diagnosis object information comprises: luminous power, operating current, working temperature and bias voltage, the equipment fault diagnosis module, the luminous power that the receiving equipment failure diagnosis apparatus returns, operating current, working temperature and bias voltage information, carry out corresponding the comparison with luminous power parameter threshold, operating current parameter threshold, working temperature parameter threshold and the bias voltage parameter threshold of the storage of equipment fault parameter threshold memory module, if determine to exceed corresponding parameter threshold, determine that there is fault in equipment.
The optical-fiber line fault diagnostic module is used to receive the optical-fiber line fault diagnostic instruction, is sent to the optical-fiber line fault diagnostic device; The corresponding spike information of the current fibre circuit that reception optical-fiber line fault diagnostic device returns, mate with the fibre circuit corresponding spike information just often of spike information storage module storage, if corresponding peak location and/or, amplitude changes, and obtains the identification information of ONU of the spike correspondence of this variation from the mapping table memory module; Otherwise, instruct to equipment fault diagnosis module transmitting apparatus failure diagnosis.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. a method of diagnosing the passive optical network PON fault is characterized in that, obtains the identification information and the logical physical distance parameter information of each optical network unit ONU of PON port; The fibre circuit that obtains PON port correspondence is the fibre circuit physical distance information of each ONU just often; According to the identification information of each ONU that obtains and logical physical distance parameter information and, the fibre circuit physical distance information of fibre circuit each ONU just often among the PON that obtains is set up the corresponding relation of the fibre circuit physical distance of the identification information of each ONU and corresponding each ONU; This method comprises:
Obtain the fibre circuit physical distance information of each ONU of current fibre circuit among the PON;
Mate the fibre circuit physical distance of corresponding each ONU of current fibre circuit and the fibre circuit physical distance information of circuit each ONU just often, determine whether to occur fiber failure.
2. the method for claim 1, it is characterized in that, describedly determine whether that fiber failure occurring comprises: if the peak location of the fibre circuit physical distance information correspondence of the ONU of current fibre circuit and/or, the spike of the fibre circuit physical distance information correspondence of the relative respective stored of amplitude changes, and obtains the identification information of ONU of the spike correspondence of this variation according to described corresponding relation; If corresponding peak location and amplitude all do not change, the actuating equipment failure diagnosis.
3. the method for claim 1 is characterized in that, carries out registration process by each ONU among the PON and obtains the identification information of each optical network unit ONU among the described PON and the parameter information of related physical distance.
4. the method for claim 1 is characterized in that, the step of the fibre circuit physical distance of fibre circuit each ONU just often and corresponding spike information comprises among the described PON of obtaining:
Optical time domain reflectometer OTDR emission light pulse receives the information of returning at the OTDR port then in optical fiber, calculate from launching light pulse to the used time of return information, again according to the speed of light in the optical fiber material, calculates described fibre circuit physical distance; The information of returning according to the ONU of different distance presents different spikes and arranges according to different physical distance positions in instrument in the instrument of OTDR, obtain the described corresponding spike information that comprises position and amplitude.
5. the method for claim 1 is characterized in that, described predefined Fault Diagnosis Strategy comprises the warning message that receives the user, starts failure diagnosis; Or
According to predefined time cycle startup failure diagnosis.
6. method as claimed in claim 5, it is characterized in that, store forward error correction FEC threshold value in advance, described predefined Fault Diagnosis Strategy comprises: the FEC value of branch's light circuit of each ONU of optical line terminal OLT statistical computation among the PON, if the FEC value that statistics obtains surpasses the FEC threshold value of storage in advance, start failure diagnosis.
7. the method for claim 1 is characterized in that, the step of described actuating equipment failure diagnosis comprises:
The instruction of OLT and each ONU transmitting apparatus failure diagnosis receives the equipment fault diagnosis object information that returns in PON, compares definite equipment fault with the equipment fault parameter threshold of storing in advance.
8. method as claimed in claim 7 is characterized in that, described equipment fault parameter threshold comprises: luminous power parameter threshold, operating current parameter threshold, working temperature parameter threshold and bias voltage parameter threshold.
9. a system that diagnoses the passive optical network PON fault is characterized in that, this system comprises: equipment fault diagnosis module, optical-fiber line fault diagnostic module and failure diagnosis control module, wherein,
Equipment fault diagnosis information gathering module is used to obtain the identification information and the logical physical distance parameter information of each optical network unit ONU of PON port, issues the failure diagnosis control module;
The optical-fiber line fault diagnostic module is used to obtain the detecting information of fibre circuit of each ONU of PON port correspondence, issues the failure diagnosis control module;
The failure diagnosis control module, be used for fibre circuit physical distance information according to the identification information of each ONU of obtaining and logical physical distance parameter information and PON fibre circuit each ONU just often of obtaining, set up the corresponding relation of the fibre circuit physical distance of the identification information of each ONU and corresponding each ONU, and mate the fibre circuit physical distance of corresponding each ONU of current fibre circuit and the fibre circuit physical distance information of circuit each ONU just often, determine whether to occur fiber failure.
10. system as claimed in claim 9, it is characterized in that, described failure diagnosis control module is according to predefined Fault Diagnosis Strategy, send the optical-fiber line fault diagnostic instruction to the optical-fiber line fault diagnostic module, the peak location of the current fibre circuit physical distance information correspondence that coupling receives and/or, the spike of the fibre circuit physical distance information correspondence of the relative respective stored of amplitude changes, if corresponding peak location and/or, amplitude changes, and obtains the identification information of ONU of the spike correspondence of this variation according to described corresponding relation; If corresponding peak location and amplitude all do not change, the actuating equipment failure diagnosis determines whether to occur fiber failure.
11. system as claimed in claim 9, it is characterized in that, described failure diagnosis control module is obtained identification information and the physical distance parameter information of each ONU among the PON by EMS or network management system NMS, obtains fibre circuit physical distance and the corresponding spike information of fibre circuit each ONU just often among the PON by EMS.
12. system as claimed in claim 10, it is characterized in that, described failure diagnosis control module comprises: log-on message memory module, spike information storage module, mapping table memory module, Fault Diagnosis Strategy module, equipment fault parameter threshold memory module, equipment fault diagnosis module and optical-fiber line fault diagnostic module, wherein
The log-on message memory module is used for storing identification information and the physical distance parameter information of each ONU of PON that obtains;
The spike information storage module, the fibre circuit physical distance and the corresponding spike information that are used for storing PON fibre circuit each ONU just often that obtains;
The mapping table memory module, according to the identification information of each ONU of log-on message memory module storage and physical distance parameter information and, fibre circuit physical distance and the corresponding spike information of fibre circuit each ONU are just often set up the identification information of each ONU and the mapping table of corresponding spike information among the PON of spike information storage module storage;
The Fault Diagnosis Strategy module is used for storage failure diagnosis strategy, when satisfying Fault Diagnosis Strategy, sends the fibre circuit diagnostic instruction to the optical-fiber line fault diagnostic module;
Equipment fault parameter threshold memory module is used for memory device fault parameter threshold value;
The equipment fault diagnosis module is used for the instruction of receiving equipment failure diagnosis, is sent to equipment fault diagnosis equipment; The equipment fault diagnosis object information that the receiving equipment failure diagnosis apparatus returns, the equipment fault parameter threshold of storing with equipment fault parameter threshold memory module compares definite equipment fault;
The optical-fiber line fault diagnostic module is used to receive the optical-fiber line fault diagnostic instruction, is sent to the optical-fiber line fault diagnostic device; The corresponding spike information of the current fibre circuit that reception optical-fiber line fault diagnostic device returns, mate with the fibre circuit corresponding spike information just often of spike information storage module storage, if corresponding peak location and/or, amplitude changes, and obtains the identification information of ONU of the spike correspondence of this variation from the mapping table memory module; Otherwise, instruct to equipment fault diagnosis module transmitting apparatus failure diagnosis.
13. equipment of diagnosing the passive optical network PON fault, it is characterized in that, this equipment comprises: log-on message memory module, spike information storage module, mapping table memory module, Fault Diagnosis Strategy module, equipment fault parameter threshold memory module, equipment fault diagnosis module and optical-fiber line fault diagnostic module, wherein
The log-on message memory module is used for storing the identification information and the physical distance parameter information of each optical network unit ONU of PON of obtaining;
The spike information storage module, the fibre circuit physical distance and the corresponding spike information that are used for storing PON fibre circuit each ONU just often that obtains;
The mapping table memory module, according to the identification information of each ONU of log-on message memory module storage and physical distance parameter information and, fibre circuit physical distance and the corresponding spike information of fibre circuit each ONU are just often set up the identification information of each ONU and the mapping table of corresponding spike information among the PON of spike information storage module storage;
The Fault Diagnosis Strategy module is used for storage failure diagnosis strategy, when satisfying Fault Diagnosis Strategy, sends the fibre circuit diagnostic instruction to the optical-fiber line fault diagnostic module;
Equipment fault parameter threshold memory module is used for memory device fault parameter threshold value;
The equipment fault diagnosis module is used for the instruction of receiving equipment failure diagnosis, is sent to equipment fault diagnosis equipment; The equipment fault diagnosis object information that the receiving equipment failure diagnosis apparatus returns, the equipment fault parameter threshold of storing with equipment fault parameter threshold memory module compares definite equipment fault;
The optical-fiber line fault diagnostic module is used to receive the optical-fiber line fault diagnostic instruction, is sent to the optical-fiber line fault diagnostic device; The corresponding spike information of the current fibre circuit that reception optical-fiber line fault diagnostic device returns, mate with the fibre circuit corresponding spike information just often of spike information storage module storage, if corresponding peak location and/or, amplitude changes, and obtains the identification information of ONU of the spike correspondence of this variation from the mapping table memory module; Otherwise, instruct to equipment fault diagnosis module transmitting apparatus failure diagnosis.
14. equipment as claimed in claim 13 is characterized in that, described spike information storage module is stored physical distance and corresponding spike information in illustrated mode.
15. equipment as claimed in claim 14, it is characterized in that, described equipment fault parameter threshold comprises: luminous power parameter threshold, operating current parameter threshold, working temperature parameter threshold and bias voltage parameter threshold, and described equipment fault diagnosis object information comprises: luminous power, operating current, working temperature and bias voltage;
Described equipment fault diagnosis module, the luminous power that the receiving equipment failure diagnosis apparatus returns, operating current, working temperature and bias voltage information, carry out corresponding the comparison with luminous power parameter threshold, operating current parameter threshold, working temperature parameter threshold and the bias voltage parameter threshold of the storage of equipment fault parameter threshold memory module, if determine to exceed corresponding parameter threshold, determine that there is fault in equipment.
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| CN113315572A (en) * | 2021-03-30 | 2021-08-27 | 阿里巴巴新加坡控股有限公司 | Optical module physical link detection method and device, optical module and optical transmission system |
| CN113315572B (en) * | 2021-03-30 | 2023-11-14 | 阿里巴巴新加坡控股有限公司 | Detection method and device for optical module physical link, optical module and optical transmission system |
| CN116192245A (en) * | 2022-12-27 | 2023-05-30 | 湖北华网控股集团有限公司 | PON network-based fault diagnosis method, system, equipment and storage medium |
| CN116545529A (en) * | 2023-07-06 | 2023-08-04 | 国网浙江省电力有限公司湖州供电公司 | Fault data processing method based on optical cable operation and maintenance path |
| CN116545529B (en) * | 2023-07-06 | 2023-09-12 | 国网浙江省电力有限公司湖州供电公司 | Fault data processing method based on optical cable operation and maintenance path |
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Application publication date: 20110511 |