CN104811240B - Detect the method and OLT of abnormal luminous ONU in PON system - Google Patents
Detect the method and OLT of abnormal luminous ONU in PON system Download PDFInfo
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- CN104811240B CN104811240B CN201410040427.4A CN201410040427A CN104811240B CN 104811240 B CN104811240 B CN 104811240B CN 201410040427 A CN201410040427 A CN 201410040427A CN 104811240 B CN104811240 B CN 104811240B
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Abstract
This disclosure relates to a kind of method and OLT for detecting abnormal luminous ONU in PON system.This method includes judging whether the increment of the crc error message of ascending time slot exceedes setting error thresholds, such as exceedes, then produces crc error alarm；Time slot corresponding with the alarm moment is determined according to the alarm moment and to the scheduling of time slot；It regard corresponding with the alarm moment time slot and its corresponding ONU of adjacent time-slots as doubtful abnormal luminous ONU；For each doubtful abnormal luminous ONU, left and right extension is carried out respectively to ascending time slot corresponding thereto；Whether judge after extension with preceding crc error message increment less than given threshold；If the increment caused by either side extension is less than given threshold, it is determined that the ONU corresponding to the time slot is abnormal；If the increment caused by the extension of both sides exceedes given threshold, it is determined that the ONU corresponding to the time slot is normal.The disclosure can will detect that influences of the abnormal luminous ONU to business is reduced to minimum degree.
Description
Technical field
This disclosure relates to which the broadband access technology of EPON, especially, is related to a kind of detection PON（Passive
Optical Network, EPON）Abnormal luminous ONU in system（Optical Network Terminal, optical-fiber network
Unit）Method and OLT（Optical Line Terminal, optical line terminal）.
Background technology
FTTx based on PON（Fiber To The X, intelligent acess（X represents home, cabinet, curb,
Building, office））Technology has user's access rate height, wide coverage, good QoS（Quality of
Service, service quality）The characteristics of guarantee ability and multicast service tenability, high speed Internet access, VoIP can be supported simultaneously
（Voice over IP, IP speeches）、IPTV（Internet Protocol Television, Web TV）It is comprehensive Deng multi-service
Splice grafting enters, and realizes really " integration of three networks ".During PON scales are built and are runed, because its multiple users share is up
The technical characteristic of bandwidth causes abnormal luminous ONU to turn into the failure that PON runs saliency.Its concrete reason is：PON system
TDMA is used in the upstream direction（Time Division Multiple Access, time division multiple acess）Burst mode, ONU must
Data must be sent in the time slot that OLT is distributed, close laser in other times planted agent and do not light, it is many under PON mouthfuls to ensure
Individual ONU can normal work.But, ONU can not according to protocol requirement send upstream data, interference or interrupt PON system in its
The transmission of his ONU upstream datas, these ONU are referred to as " abnormal luminous ONU ".
At present, during abnormal luminous ONU in solving the problems, such as PON system, conventional method is by opening one by one
Or the mode of shut-off ONU optical module laser transmitters power supplys is detected and diagnosed, still, this method can be to normal ONU
Downlink business cause complete interruption.
The content of the invention
The disclosure is in view of at least one in problem above proposes new technical scheme.
The disclosure provides a kind of method for detecting abnormal luminous ONU in PON system in its one side, and it will can be examined
Survey influences of the abnormal luminous ONU to business and be reduced to minimum degree.
The disclosure provides a kind of OLT in its another aspect, and it can will detect that influences of the abnormal luminous ONU to business is dropped
It is low to arrive minimum degree.
According to the disclosure there is provided a kind of method for detecting abnormal luminous ONU in PON system, including：
Judge that OLT distributes the CRC of ascending time slot for each ONU in PON system in adjustment settings time interval（Cyclic
Redundancy Check, CRC）Whether the increment of error message exceedes setting error thresholds respectively, such as exceedes,
Then produce crc error alarm；
OLT in moment and PON system is alerted according to crc error with crc error is alerted the moment pair to the scheduling determination of time slot
The time slot answered, wherein, each time slot is corresponding with an ONU respectively；
It is corresponding that the moment is alerted by the ONU corresponding to time slot corresponding with the crc error alarm moment and with crc error
The corresponding ONU of the adjacent time slot of time slot is as doubtful abnormal luminous ONU；
For each doubtful abnormal luminous ONU, left and right extension is carried out respectively to ascending time slot corresponding thereto；
Judge whether the increment after extension with the crc error message for being expanded ascending time slot before extension is less than setting threshold
Value；
If the increment of the crc error message caused by left side extension or right extension is less than given threshold, really
The fixed ONU being expanded corresponding to time slot is abnormal luminous ONU；
If the increment of the crc error message caused by left side is extended with right extension exceedes given threshold,
Determine that the ONU for being expanded corresponding to time slot is normal luminous ONU.
In some embodiments of the present disclosure, this method also includes：
When being extended to the ascending time slot corresponding to doubtful abnormal luminous ONU, if without enough upstream datas
Cause slot portion overlapping, then OLT indicates that doubtful abnormal luminous ONU corresponding with being expanded time slot sends the up of regular length
Data are to realize partly overlapping between time slot.
In some embodiments of the present disclosure, left and right extension is being carried out respectively to time slot corresponding to doubtful abnormal luminous ONU
When, to the time slot corresponding to other ONU in PON system without extension.
According to the disclosure, a kind of OLT is additionally provided, including：
CRC alerts generation unit, for judging that OLT is distributed by each ONU in PON system in adjustment settings time interval
Whether the increment of the crc error message of ascending time slot exceedes setting error thresholds respectively, such as exceedes, then produces crc error alarm；
Doubtful Slot determining unit, it is true for alerting scheduling of the OLT to time slot in moment and PON system according to crc error
Fixed time slot corresponding with the crc error alarm moment, wherein, each time slot is corresponding with an ONU respectively；
Doubtful abnormal ONU determining units, for the ONU corresponding to alerting moment corresponding time slot with crc error and
The adjacent corresponding ONU of time slot of time slot corresponding with the crc error alarm moment is as doubtful abnormal luminous ONU；
Ascending time slot expanding element, for for each doubtful abnormal luminous ONU, to ascending time slot corresponding thereto point
Carry out not left and right extension；
Judging unit, be for the increment after judgement extension with the crc error message for being expanded ascending time slot before extension
It is no to be less than given threshold；
ONU status determining units, if the increasing for the crc error message caused by left side extension or right extension
Amount is less than given threshold, it is determined that it is abnormal luminous ONU that this, which is expanded ONU corresponding to time slot, if due to left side extension and
The increment of crc error message caused by right extension exceedes given threshold, it is determined that this is expanded the ONU corresponding to time slot
For normal luminous ONU.
In some embodiments of the present disclosure, ascending time slot expanding element is to upper corresponding to doubtful abnormal luminous ONU
When row time slot is extended, if causing to partly overlap to adjacent time-slots without enough upstream datas, it indicates that with being expanded
The corresponding doubtful abnormal luminous ONU of exhibition time slot sends the upstream data of regular length to realize partly overlapping between time slot.
In some embodiments of the present disclosure, ascending time slot expanding element is to time slot corresponding to doubtful abnormal luminous ONU
When carrying out left and right extension respectively, to the time slot corresponding to other ONU in PON system without extension.
In the technical scheme of the disclosure, due to having carried out left and right extension to the time slot corresponding to doubtful abnormal luminous ONU,
Determine whether the doubtful abnormal luminous ONU is real abnormal luminous ONU further according to the crc error message number before and after extension.
Due to being not turned off any detected ONU transmitter supply in whole detection process, therefore, this is ensure that to the full extent
ONU up-downgoing business is normally carried out.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding of the disclosure, constitutes the part of the application.Attached
In figure：
Fig. 1 be disclosure one embodiment detection PON system in abnormal luminous ONU method schematic flow sheet.
Fig. 2 is the schematic diagram that disclosure PON up directions use TDMA access ways.
Fig. 3 is the OLT of disclosure one embodiment structural representation.
Embodiment
The disclosure is described below with reference to accompanying drawings.It should be noted that following description is only explanatory in itself and shown
Example property, never as to the disclosure and its application or any limitation used.Unless stated otherwise, otherwise, implementing
The part and the positioned opposite and numerical expression and numerical value of step illustrated in example is not intended to limit the scope of the present disclosure.In addition,
Technology well known by persons skilled in the art, method and apparatus may not be discussed in detail, but are meant as in appropriate circumstances
A part for specification.
At present, software reason and hardware reason can be included the reason for ONU failures.Include optical module in hardware reason hard
Part failure, for example, the transmitter supply of ONU optical module lasers can not be opened or closed at the appointed time.Occur in advance or prolong
Slot offset can be caused by beating opening/closing laser transmitters power supply late, and previous ONU or latter ONU may be influenceed up
Time slot, causes the interference of data between time slot.In addition, hardware fault, which is also likely to be optical module, does not receive instruction, thorough " dead "
.Software reason exists to coordinate between time delay, or PON chips and optical module chip and existed including the processing OLT instructions issued
Problem, causes the time window do not specified in agreement to send upstream data.
The following embodiments of the disclosure propose it is a kind of to abnormal luminous ONU detection and diagnosis scheme in PON system, its
Dynamic distance delay compensation mechanism in the detection of OLT/ONU luminous powers and Dynamic Bandwidth Allocation is combined in PON system and carries out abnormal hair
Light ONU detection, the program can effectively realize the detection and diagnosis of abnormal luminous ONU in PON system, and be effectively isolated event
Hinder ONU, while detection and the influence diagnosed to business can be reduced to minimum degree again.
Specifically, by analyzing the phenomenon that abnormal luminous ONU failures are caused in PON system, once due to abnormal luminous ONU
Transmission power be not enough to ONU all under PON ports where interrupting it, then will some ONU be still in wire
State, remaining ONU for being disturbed or interrupting will be unable to normal registration, in the state of going offline.The disclosure is by performance statistics and analysis
Function passes through time slot analysis and adjustment work(for PON mouthfuls of progress performance statisticses of OLT, the situation of principal statistical crc error message
The associate uplink bandwidth time slots for producing crc error message can be analyzed, the adjacent time-slots of these time slots and these time slots are carried out
The ONU of row data transfer is classified as doubtful abnormal luminous ONU, and carries out the fault diagnosis of next step.
Diagnosed for doubtful abnormal luminous ONU, pass through time slot analysis with adjustment the Function Extension ONU upstream bandwidth
Time slot is distributed, is allowed to overlapping with adjacent time-slots appearance, and again by the situation of PON mouthfuls of performance statistics crc error messages of OLT
Whether the ONU that diagnosis time slot is expanded is abnormal luminous ONU.
OLT PON mouthfuls of performance statisticses twice are carried out before abnormal luminous ONU Diagnostic Strategies are started, this is counted and is expanded time slot
ONU crc error message quantity.First, doubtful abnormal luminous ONU upstream bandwidths distribution time slot is adjusted, with adjacent ONU's
Ascending time slot occur it is overlapping, carry out PON mouthful performance statisticses of OLT, it should be pointed out that need herein progress twice, be once with it is rear
The slot portion in face is overlapping, judges whether that laser occur does not close according to protocol time, another time to be and time slot portion above
Divide overlapping, judge whether the situation that laser is opened in advance occur.Then, then recover ONU upstream bandwidths time slot distribution, not artificially
Ground causes slot portion overlapping, and carries out PON mouthfuls of crc error message performance statisticses of OLT again.If regardless of whether adjustment ONU
Upstream bandwidth time slot, twice OLT PON mouthfuls of performance statisticses have the crc error message of the ONU, and the increasing of crc error message
Amount is less than given threshold, it is determined that the doubtful abnormal luminous ONU is abnormal luminous ONU；Conversely, only in adjustment ONU upstream bandwidths
The obvious increase of crc error message can be just counted on after time slot, i.e. the increment of crc error message is more than given threshold, then judges
The ONU is not abnormal luminous ONU.
For the abnormal luminous ONU being diagnosed to be, its optical module laser transmitters power supply is closed, to carry out Fault Isolation.
Fig. 1 be disclosure one embodiment detection PON system in abnormal luminous ONU method schematic flow sheet.
As shown in figure 1, the embodiment may comprise steps of：
S102, judges that OLT distributes the CRC mistakes of ascending time slot for each ONU in PON system in adjustment settings time interval
Whether the increment for reporting text by mistake exceedes setting error thresholds respectively, such as exceedes, then produces crc error alarm；
Specifically, the number using ONU as the crc error message of the ascending time slot of index is counted in the time interval set
Mesh, then by false alarm of the number of the crc error message occurred in current time interval with identical ONU in last time interval
The number of text is compared, if increment exceedes setting error thresholds, shows that the ONU is likely to occur abnormal luminous, for example, going out
Now luminous or delayed luminescence etc., and then cause the crc error message data of time slot corresponding to the ONU to dramatically increase in advance, now
It can trigger crc error alarm.
S104, according to when scheduling determinations of the OLT to time slot is alerted with crc error in crc error alarm moment and PON system
Corresponding time slot is carved, wherein, each time slot is corresponding with an ONU respectively；
Specifically, OLT have recorded the ONU information scheduled in each moment when being scheduled to ONU, due to crc error
The time of counting messages is very small compared with the time of whole time slot, therefore can ignore, at this point it is possible to be accused using crc error
At the time of the alert moment dispatches as OLT to doubtful abnormal luminous ONU, according to each time slot of the temporal information and OLT memory storages with
Scheduling relational query between ONU goes out the ONU corresponding to time slot corresponding with the crc error alarm moment.
S106, the moment pair is alerted by the ONU corresponding to time slot corresponding with the crc error alarm moment and with crc error
The adjacent corresponding ONU of time slot of the time slot answered is as doubtful abnormal luminous ONU；
In order to prevent because the crc error alarm moment is in the edge of time slot and causes and alerts the moment according to crc error
Position the time slot position error caused by doubtful abnormal luminous ONU, will with corresponding to crc error alarm moment corresponding time slot
ONU as doubtful abnormal luminous ONU while, it is also that the adjacent time-slots institute that moment corresponding time slot is alerted with crc error is right
The ONU answered also serves as doubtful abnormal luminous ONU.
S108, for each doubtful abnormal luminous ONU, left and right extension is carried out to ascending time slot corresponding thereto respectively；
Lighted in advance for example, OLT dispatches the doubtful abnormal luminous ONU, that is, to the ascending time slot corresponding to the ONU
Left side extension is carried out, after carrying out detecting whether the ONU is real abnormal luminous ONU to left side extension, OLT can continue
The doubtful abnormal luminous ONU delayed luminescences are dispatched, that is, carrying out right extension to the ascending time slot corresponding to the ONU.
If the doubtful abnormal luminous ONU is normal luminous ONU, it can normally receive the dispatch command that OLT is sent,
And ONU optical module laser transmitters power supplys are opened or closed according to dispatch command, it is such as abnormal luminous ONU, then the ONU can not
The timeslot scheduling instruction that OLT is sent is normally received or normally performs, for example, can not open and/or close according to OLT scheduling
ONU optical module laser transmitters power supplys.
S110, judges after extension to be set with whether the increment of the crc error message for being expanded ascending time slot before extension is less than
Determine threshold value；
If for example, faulted ONU normally can not receive or perform the finger of the luminous or delayed luminescence in advance of OLT transmissions
Order, then cause the quantity of the crc error message of the time slot and the crc error message of the time slot before extension after ascending time slot extension
Quantity difference is smaller, for example, increment is less than given threshold, then shows that the ONU is not opened or late release in advance according to OLT scheduling
Transmitter supply；If the ONU is non-faulting ONU, it can in advance be opened according to OLT scheduling or late release launches electromechanical
Source, can so cause after time slot extension due to causing to partly overlap with front or rear time slot so that this is expanded the CRC mistakes of time slot
The literary number of wrong report is dramatically increased, for example, increment is more than given threshold, then show the ONU according to OLT dispatch commands it is normally-open or
Close transmitter supply.
S112, if the increment of the crc error message caused by left side extension or right extension is less than given threshold,
Then determine that the ONU for being expanded corresponding to time slot is abnormal luminous ONU；
If the extension of either side causes the increment of crc error message to be less than given threshold, show that the ONU there may be
The problem of unlatching in advance or late release.
S114, if the increment of the crc error message caused by left side is extended with right extension exceedes setting threshold
Value, it is determined that the ONU for being expanded corresponding to time slot is normal luminous（That is, it is non-abnormal luminous）ONU；
Specifically, ONU it is abnormal luminous be probably due to opening in advance or late release transmitter supply is caused, therefore,
The increment of left side extension and the crc error message caused by right extension is needed just to show this in the case of exceeding given threshold
ONU is non-abnormal luminous ONU.
In this embodiment, due to having carried out left and right extension to the time slot corresponding to doubtful abnormal luminous ONU, further according to expansion
Crc error message number before and after exhibition determines whether the doubtful abnormal luminous ONU is real abnormal luminous ONU.Due to whole
Any detected ONU transmitter supply is not turned off in individual detection process, therefore, above and below the ONU is ensure that to the full extent
What industry was engaged in is normally carried out.
Further, after step sl 12, if it is determined that doubtful abnormal luminous ONU is real abnormal luminous ONU, then
Abnormal luminous ONU optical module laser transmitters power supply is closed, to realize Fault Isolation.
Further, in step S108, when being extended to the ascending time slot corresponding to doubtful abnormal luminous ONU,
If causing slot portion overlapping without enough upstream datas, OLT indicates doubtful abnormal hair corresponding with being expanded time slot
Light ONU sends the upstream data of regular length to realize partly overlapping between time slot.
In addition it should be pointed out that, in order to exclude interference of other ONU to measured ONU, to doubtful abnormal luminous
When time slot corresponding to ONU carries out left and right extension respectively, to the time slot corresponding to other ONU in PON system without extension, i.e.
Transmitter supply is turned on and off according to OLT normal consistency.
Next, being described further by an instantiation come technical scheme of this disclosure.
In EPON system, TDMA access way is used in up direction, i.e. each ONU is in specific time window
It is interior to send upstream to OLT, and to ensure the conflict of each ONU uplink service stream not on time of origin.OLT concentrates control
The ascending time slot distribution mechanism of system is exactly the SLA according to each ONU by OLT（Service Level Agreement, the grade of service
Agreement）The upstream bandwidth demand reported with reference to each ONU distributes up mandate time slot to each ONU（That is, grant window）,
Each grant is a time window, the length comprising initial time and time window；All ONU all according to OLT distribute it is upper
Row authorizes time slot to up transmission data flow, this assures the conflict on upstream between each ONU not time of origin,
The utilization ratio of upstream bandwidth is also improved simultaneously.And once some time slot, which is adjusted, will cause Time Slot Overlap, such as Fig. 2
It is shown.
The method for screening abnormal luminous ONU in PON system is divided into detection and two stages of diagnosis by the embodiment.In exception
Luminous ONU detection-phases, when occurring abnormal luminous ONU problems in PON system, once faulted ONU appearance is abnormal luminous, and it is sent out
When luminous power is insufficient to interfere with same OLT PON mouthfuls other lower all ONU, it will occur a part of ONU be interfered and
It is offline, and another part ONU is still online.In order to realize the purpose of the disclosure, utility statistics and analytic function realization pair
The statistics of PON mouthfuls of performances of OLT, for example, the PON mouthfuls of lower up crc error messages of ONU are counted, once at a time
Crc error message increases extremely, and triggering time slot analysis carry out upstream bandwidth time slot analysis with adjustment function, due to reporting CRC to report
Text has timestamp, is based on OLT local zone times, and OLT is also to be distributed according to local zone time when distributing time slot, these
Temporal information is recorded and preserved by OLT, when receiving CRC alarms, can be by crc error message increment just above setting mistake
The timestamp information of CRC messages during thresholding is compared with the specific time of distributed time slot, can specifically position generation CRC
The adjacent time slot of time slot, the time slot of the associate uplink bandwidth of error message, and the corresponding ONU of these time slots, by these
The ONU that time slot carries out transmitting uplink data is classified as the fault diagnosis that doubtful abnormal luminous ONU carries out next step.Why find out doubtful
It is to reduce detection range, reduce the influence to system business like abnormal luminous ONU.
Specifically, detecting can include the step of abnormal luminous ONU：
Step 1, by daily routine OLT PON mouthfuls of performance statisticses, once the crc error message for occurring some ONU is different
Often increase（That is, the increment of the crc error message in adjustment settings time interval exceedes setting error thresholds）, then CRC is produced wrong
Alert by mistake.
Step 2, by crc error alarm triggered upstream bandwidth time slot analysis, to produce at the time of crc error alarm as base
Standard, positions the time slot of corresponding upstream bandwidth when this, and the time slot is defined as into time slot A.
Step 3, will be two neighboring in order to prevent from omitting diagnosis to abnormal luminous ONU, in addition it is also necessary to orient adjacent time-slots
Time slot is defined as time slot B and C.These time slots are probably the interference source for causing A time slot crc error messages.In addition, when positioning adjacent
Gap can also prevent the uncertainty brought because alarm time is inaccurate.
Step 4, the ONU corresponding to upstream bandwidth time slot A, time slot B and time slot C, these time slots are oriented successively（That is, when
Gap A, B and C）The ONU for carrying out transmitting uplink data is classified as doubtful abnormal luminous ONU, forms a doubtful abnormal luminous ONU row
Table, carries out the fault diagnosis of next step.
In abnormal luminous ONU diagnostic phases, in order to realize the purpose of the disclosure, in the time slot for all ONU upstream bandwidths
During distribution, doubtful abnormal luminous ONU upstream bandwidth time slot is extended, the upstream bandwidth time slot hair with adjacent ONU is allowed to
Life is overlapping, and then diagnoses whether the ONU is abnormal luminous ONU by PON mouthfuls of performance statisticses of OLT.
If it is pointed out that PON mouthfuls of lower ONU uplink service is less when to cause without enough upstream datas
It is overlapping between gap, then after abnormal luminous ONU Diagnostic Strategies are started, the doubtful abnormal luminous ONU that OLT will specify this to be diagnosed
The upstream data of regular length is sent, for example：10101010 character string.
In to PON system during abnormal luminous ONU diagnosis, arbitrarily chosen from doubtful abnormal luminous ONU lists
One, as the ONU being diagnosed, upstream bandwidth time slot adjustment is carried out by time slot analysis with adjustment function, specific as follows：
Step 1, it is directed to by the original dynamic bandwidth dispatching algorithm of PON system under OLT PON in each online ONU calculating
The time slot of row bandwidth, other ONU in addition to ONU is diagnosed are handed down to by upstream bandwidth Time slot allocation situation, and are currently diagnosed
ONU time slot is handed down to that this is currently diagnosed again after being then extended on the basis of original algorithm result of calculation doubtful different
Often light ONU.
Step 2, after abnormal luminous ONU diagnosis are started, the ONU upstream bandwidth time slot windows are adjusted, when first by the ONU
Gap window end time is postponed（For example, 1000ns）, i.e. time slot knot is postponed by the time of the closing of retard transmitter power supply
Beam time, but the time started is constant, now doubtful abnormal luminous ONU upstream bandwidth time slot is by the time slot with subsequent one ONU
Overlap.
Step 3, carry out PON mouthfuls of performance statisticses of OLT, principal statistical this be diagnosed ONU up crc error message number
Amount.
Step 4, recovery are diagnosed the adjustment of ONU upstream bandwidth time slots to this, no longer artificially cause this be diagnosed time slot with
Subsequent timeslot partly overlaps, and carries out OLT PON mouthfuls of performance statisticses again, principal statistical this be diagnosed ONU up crc error
The quantity of message.
Step 5, the quantity of ONU crc error message is diagnosed before and after comparing twice, if OLT twice before and after adjustment
PON mouthfuls of performance statisticses have the number of crc error message and the number of crc error message before adjustment after crc error message, and adjustment
Mesh difference is less than given threshold, then the ONU is diagnosed as into abnormal luminous ONU, and ONU optical modules laser is not closed on request,
The shut-in time is postponed.If the number that crc error message only can be just counted on after adjustment ONU upstream bandwidth time slots is notable
Increase, then it is not abnormal luminous ONU to judge the ONU, without the abnormal luminous follow-up ONU of interference.The Main Basiss of above-mentioned judgement are
Before and after adjustment dynamic delay causes ascending time slot overlapping, if the ONU is abnormal luminous to disturb other ONU, and by other
ONU is disturbed and is produced crc error message；But if the ONU does not have the abnormal luminous follow-up ONU of interference, then recovering to adjust
After its whole ascending time slot, without interference with other ONU, or disturbed by other ONU and produce crc error message.
Step 6, if the ONU is not diagnosed as abnormal luminous, its up Time slot allocation situation is adjusted again, by this
ONU time slot window start times shift to an earlier date（For example, 1000ns）, i.e. in advance should by way of opening transmitter supply in advance
Between at the beginning of time slot, but the end time is constant, and now doubtful abnormal luminous ONU upstream bandwidth time slot will be with above one
ONU time slot overlaps.
Step 7, by PON mouthfuls of performance statisticses of OLT, and the up crc error message amount for being diagnosed OUN is compared
Situation of change.If still only can just count on crc error message or crc error report after adjustment ONU upstream bandwidth time slots
Literary quantity substantially increases, then it is not abnormal luminous ONU to judge the ONU, the ONU without the abnormal luminous previous time slot of interference.Knot
The diagnostic result for adjusting ascending time slot twice is closed, it is not abnormal luminous ONU to judge the ONU.If new capability statistics has twice
Crc error message and error message quantity are not apparent from increase, then are diagnosed as abnormal luminous ONU, then judge the ONU to be abnormal luminous
ONU, and ONU optical modules laser do not open on request, is advanced by opening time.
Step 8, if it is abnormal luminous ONU to be currently diagnosed ONU, its optical module laser transmitters electricity is forever closed
Source, realizes the isolation of faulted ONU.
Step 9, if it is not abnormal luminous ONU to be currently diagnosed ONU, by it from doubtful abnormal luminous ONU lists
Delete, and a doubtful abnormal luminous ONU is chosen again as ONU is diagnosed from list, according to the method for step 1~step 7
Diagnosed.
It will appreciated by the skilled person that realizing the whole and part steps of above method embodiment can pass through
Programmed instruction related hardware is completed, and foregoing program can be stored in a computing device read/write memory medium, the journey
Sequence upon execution, performs the step of including above method embodiment, and foregoing storage medium can include ROM, RAM, magnetic disc
With CD etc. is various can be with the medium of store program codes.
Fig. 3 is the OLT of disclosure one embodiment structural representation.
As shown in figure 3, the OLT30 in the embodiment can include：
CRC alerts generation unit 302, for judging in adjustment settings time interval that OLT is each ONU institute in PON system
Whether the increment for distributing the crc error message of ascending time slot exceedes setting error thresholds respectively, such as exceedes, then produces crc error
Alarm；
Doubtful Slot determining unit 304, for alerting scheduling of the OLT to time slot in moment and PON system according to crc error
It is determined that time slot corresponding with the crc error alarm moment, wherein, each time slot is corresponding with an ONU respectively；
Doubtful abnormal ONU determining units 306, for the ONU corresponding to alerting moment corresponding time slot with crc error,
And the adjacent corresponding ONU of time slot of moment corresponding time slot is alerted as doubtful abnormal luminous ONU with crc error；
Ascending time slot expanding element 308, for for each doubtful abnormal luminous ONU, during to corresponding thereto up
Gap carries out left and right extension respectively；
Judging unit 310, for judging the increment after extension with the crc error message for being expanded ascending time slot before extension
Whether given threshold is less than；
ONU status determining units 312, if for the crc error message caused by left side extension or right extension
Increment be less than given threshold, it is determined that it is abnormal luminous ONU that this, which is expanded ONU corresponding to time slot, if because left side is expanded
The increment of crc error message caused by exhibition and right extension exceedes given threshold, it is determined that this is expanded corresponding to time slot
ONU be normal luminous ONU.
In this embodiment, due to having carried out left and right extension to the time slot corresponding to doubtful abnormal luminous ONU, further according to expansion
Crc error message number before and after exhibition determines whether the doubtful abnormal luminous ONU is real abnormal luminous ONU.Due to whole
Any detected ONU transmitter supply is not turned off in individual detection process, therefore, above and below the ONU is ensure that to the full extent
What industry was engaged in is normally carried out.
In addition, ascending time slot expanding element to the ascending time slot corresponding to doubtful abnormal luminous ONU when being extended, such as
Fruit causes to partly overlap to adjacent time-slots without enough upstream datas, it indicates that doubtful exception corresponding with being expanded time slot
Luminous ONU sends the upstream data of regular length to realize partly overlapping between time slot.
Further, ascending time slot expanding element is carrying out left and right expansion respectively to time slot corresponding to doubtful abnormal luminous ONU
Zhan Shi, to the time slot corresponding to other ONU in PON system without extension.
The embodiment of each in this specification is described by the way of progressive, and what each embodiment was stressed is and it
Identical and similar part can be with cross-reference between the difference of his embodiment, each embodiment.For device embodiment
For, because it is substantially similar to embodiment of the method, so description is fairly simple, related part may refer to embodiment of the method
Partial explanation.
Although describing the disclosure with reference to exemplary embodiment, it should be appreciated that the disclosure is not limited to above-mentioned exemplary
Embodiment.It will be obvious to those skilled in the art that can be changed under conditions of without departing substantially from the scope of the present disclosure and spirit
Exemplary embodiments mentioned above.The scope of appended claim should be endowed most wide explanation, such to be repaiied comprising all
Change and equivalent 26S Proteasome Structure and Function.
Claims (6)
1. a kind of method for detecting abnormal luminous ONU in PON system, it is characterised in that including：
Judge that OLT distributes the crc error message of ascending time slot for each ONU in PON system in adjustment settings time interval
Whether increment exceedes setting error thresholds respectively, such as exceedes, then produces crc error alarm；
Scheduling determinations of the OLT to time slot in moment and PON system is alerted according to crc error corresponding with the crc error alarm moment
Time slot, wherein, each time slot is corresponding with an ONU respectively；
By the ONU corresponding to time slot corresponding with the crc error alarm moment and time slot corresponding with the crc error alarm moment
The adjacent corresponding ONU of time slot as doubtful abnormal luminous ONU；
For each doubtful abnormal luminous ONU, left and right extension is carried out respectively to ascending time slot corresponding thereto, made corresponding thereto
The ascending time slot answered is overlapping with adjacent time-slots appearance；
Judge whether the increment after extension with the crc error message for being expanded ascending time slot before extension is less than given threshold；
If the increment of the crc error message caused by left side extension or right extension is less than given threshold, it is determined that should
It is abnormal luminous ONU to be expanded the ONU corresponding to time slot；
If the increment of the crc error message caused by left side is extended with right extension exceedes given threshold, it is determined that
The ONU for being expanded corresponding to time slot is normal luminous ONU.
2. abnormal luminous ONU method in detection PON system according to claim 1, it is characterised in that methods described is also
Including：
When being extended to the ascending time slot corresponding to doubtful abnormal luminous ONU, if caused without enough upstream datas
Slot portion is overlapping, then OLT indicates that doubtful abnormal luminous ONU corresponding with being expanded time slot sends the upstream data of regular length
To realize partly overlapping between time slot.
3. abnormal luminous ONU method in detection PON system according to claim 1, it is characterised in that to doubtful different
When often time slot corresponding to luminous ONU carries out left and right extension respectively, to the time slot corresponding to other ONU in PON system without expanding
Exhibition.
4. a kind of OLT, it is characterised in that including：
CRC alerts generation unit, for judging that OLT is distributed up by each ONU in PON system in adjustment settings time interval
Whether the increment of the crc error message of time slot exceedes setting error thresholds respectively, such as exceedes, then produces crc error alarm；
Doubtful Slot determining unit, for according to crc error alert scheduling of the OLT to time slot in moment and PON system determine with
Crc error alarm moment corresponding time slot, wherein, each time slot is corresponding with an ONU respectively；
Doubtful abnormal ONU determining units, for ONU, Yi Jiyu corresponding to alerting moment corresponding time slot with crc error
The adjacent corresponding ONU of time slot of crc error alarm moment corresponding time slot is as doubtful abnormal luminous ONU；
Ascending time slot expanding element, for for each doubtful abnormal luminous ONU, entering respectively to ascending time slot corresponding thereto
The extension of row left and right, makes ascending time slot corresponding thereto overlapping with adjacent time-slots appearance；
Judging unit, for judging whether the increment after extension with the crc error message for being expanded ascending time slot before extension is small
In given threshold；
ONU status determining units, if the increment for the crc error message caused by left side extension or right extension is small
In given threshold, it is determined that the ONU for being expanded corresponding to time slot is abnormal luminous ONU, if due to left side extension and right side
The increment of crc error message caused by extension exceedes given threshold, it is determined that this is expanded the ONU corresponding to time slot for just
Often light ONU.
5. OLT according to claim 4, it is characterised in that the ascending time slot expanding element is to doubtful abnormal luminous
When ascending time slot corresponding to ONU is extended, if causing to partly overlap to adjacent time-slots without enough upstream datas,
Then indicate that doubtful abnormal luminous ONU corresponding with being expanded time slot sends the upstream data of regular length to realize the portion between time slot
Divide overlapping.
6. OLT according to claim 4, it is characterised in that the ascending time slot expanding element is to doubtful abnormal luminous
When time slot corresponding to ONU carries out left and right extension respectively, to the time slot corresponding to other ONU in PON system without extension.
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| CN107294595B (en) * | 2016-03-30 | 2020-09-04 | 南京中兴新软件有限责任公司 | Detection method and device for long-luminescence optical network unit and optical line terminal |
| CN111866621B (en) * | 2019-04-25 | 2023-03-31 | 上海诺基亚贝尔股份有限公司 | Clock circuit management method, apparatus and computer readable medium |
| CN114079959B (en) * | 2020-08-13 | 2023-08-04 | 大唐移动通信设备有限公司 | Abnormality positioning method and device, electronic equipment and storage medium |
| CN113727223B (en) * | 2021-08-18 | 2023-11-03 | 烽火通信科技股份有限公司 | Uplink data transmission method, abnormal light emitting detection method, equipment and system |
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