CN101317349B - Passive optical network maintenance method, optical network unit and optical line terminal - Google Patents
Passive optical network maintenance method, optical network unit and optical line terminal Download PDFInfo
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- CN101317349B CN101317349B CN200780000412.3A CN200780000412A CN101317349B CN 101317349 B CN101317349 B CN 101317349B CN 200780000412 A CN200780000412 A CN 200780000412A CN 101317349 B CN101317349 B CN 101317349B
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- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
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- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
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Abstract
A method for maintaining the passive optical network, an optical network element and an optical line terminal are used for solve the problem that it can not detect and insulate the failed optical module at the optical line terminal side in the prior art. In the said maintaining method, when the optical line terminal detects the continuously occupied time of the upstream communication line exceeds the preset threshold, it detects the failed optical network element continuously occupying the upstream communication line, and indicates the failed optical network unit to shut off the transmitting circuit power with control message or control signal.; In order to realize the method, the optical line terminal of the invention includes a maintaining module for detecting the fault and performing the fault processing, the transmitting power and the receiving power of the optical network element are placed independently, and the transmitting power control module turns on or shuts off the transmitting power according to the control message or control signal of the optical line terminal. The technical scheme of the invention realizes the detect and the insulation of the failed optical network element.
Description
Technical field
The present invention relates to EPON, particularly a kind of EPON maintaining method, optical network unit and optical line terminal.
Background technology
In the increasing broadband access network, the most existing local area network (LAN) operates on the access network of 100Mbit/s, and many large-scale commercial companies are to gigabit Ethernet (GE, Gigabit Ethernet) transition.And it is online at metro core net and metro edge, Synchronous Optical Network (SONET, SynchronousOptical Network)/SDH (Synchronous Digital Hierarchy) (SDH, Synchronous Digital Hierarchy)/and the GE bandwidth capacity is very abundant, and this makes Access Network partly produce serious bandwidth bottleneck.Compare with cable transmission, advantage such as Optical Fiber Transmission has that capacity is big, loss is little, anti-electromagnetic interference capability is strong, thereby, along with the progressively decline of Optical Fiber Transmission cost, the fiberize of the Access Network development trend that is inevitable.EPON (PON, Passive Optical Network) is one of major technique of inserting of optical fiber, according to the deep degree of optical fiber, optical fiber inserts the (FTTH that can be divided into that Fiber to the home, Fiber to the Home), Fiber-To-The-Building (FTTB, Fiber to the Building/Curb), Fiber To The Curb (FTTCurb, Fiber to the Curb), Fiber To The Cabinet (FTTC, Fiber to the Cabinet), FTTP (FTTP, Fiber to thePremises) etc., be referred to as optical fiber to X (FTTX, Fiber to the X).
Classify from the content of carrying, the PON technology mainly comprises APON (ATM Based PONs), EPON (Ethernet Based PONs) and GPON (Gigabit PONs) etc., as shown in Figure 1, the PON network comprises the optical line terminal (OLT that is positioned at the central office, Optical Line Terminal) and a series of optical network unit/terminal (ONU/ONT that is positioned at user resident, Optical Network Unit/Terminal), pass through optical fiber between OLT and the ONU/ONT, the Optical Distribution Network (ODN, Optical Distribution Network) that passive optical splitters or coupler constitute connects.
In a PON network, can pull out simple optical fiber to the broadband services subarea or the office garden from service exchange, and then isolate some branch roads on each building or business device from main fiber with passive optical splitters or coupler.This mode can make a plurality of users share the relatively costly optical fiber link of this section from exchange to the user resident, thereby has also greatly reduced the use cost of FTTB and FTTH.
There is not any active device in EPON between from the Central Exchange to the local network of users, the substitute is Passive Optical Components is inserted in the network, and realize that by power division unicast arrives multiple spot on entire path.This replacement makes the service provider no longer need the active device in transmit ring the energy to be provided and to carry out maintaining, has saved service provider's cost greatly.Passive optical splitter and coupler only play the effect of transmitting and limiting light, do not need power supply and information processing, can reduce service supplier's maintenance cost comprehensively.
By adopting APON/BPON, EPON or being about to standardized GPON technology, on the trunk optical fiber of PON, can support the speed of 155Mbit/s, 622Mbit/s, 1.25Gbit/s or 2.5Gbit/s.Be while support voice, data and Video Applications, each user's allocated bandwidth can be static, also can be dynamic.
Wherein, have OLT basic structure now as shown in Figure 2, the basic structure of ONU/ONT all comprises optical module, Service Processing Module and the power module of receiving and dispatching light signal as shown in Figure 3, wherein: comprise in the optical module:
Receiving circuit connects uplink, is used to receive upward signal and carries out opto-electronic conversion;
Transtation mission circuit connects downlink, is used for the signal of telecommunication to be sent is carried out sending by downlink after the opto-electronic conversion;
Whether SD (Signal Detect, input) signal monitoring circuit is used to monitor uplink and is continued to take, promptly whether there is light signal to arrive, and by SD terminals output testing result, if there is light signal to arrive, SD terminals output signal is a high level, on the contrary output low level;
Working power circuit is used for providing working power to optical module, and in the prior art, the working power of transtation mission circuit and receiving circuit merges setting.
Service Processing Module one end of OLT is by central site network interface (CNI, Central NetworkInterface) connects local side uplink network interface, ONU/ONT one end is by User Network Interface (UNI, User Network Interface) connects subscriber equipment, certainly, also comprise the necessary control module in the basic structure of OLT, ONU/ONT.
Downstream data flow is broadcast to each ONU/ONT from OLT in the PON network, and each ONU/ONT only handles the data of destination address and himself coupling by the address information in the match protocol transmission unit head.Up traffic transport is comparatively complicated, in the passive optical network of point-to-multipoint, because there is the characteristic of sharing medium in ODN, each ONU/ONT terminal is by time division multiple access (TDMA, Time Division Multiple Addressing) mode sends data to OLT, generation for fear of conflict, under the normal condition, OLT distributes different time slots (mandate) according to the caching situation of the data to be sent that ONU/ONT reports for the ONU/ONT that registers, ONU only opens optical module in OLT distributed time slot (mandate), therefore under the normal condition, the uplink timesharing takies, and the SD signal of OLT sidelight module is a pulse signal.
OLT distributes time slot (mandates) for each ONU, guarantees to have only the ONU can be luminous at synchronization, and the promptly specific specific ONU/ONT of transmission time sheet representative, these timeslices can be avoided producing between the different ONU/ONT bursts and conflict synchronously.If but the optical module fault of certain ONU/ONT, be in normal luminance, perhaps there is the malicious user optical module to be set to Chang Faguang, other ONU that are connected under the same OLT port with this ONU will all paralyse so, compare with traditional Point-to-Point system, such influence is unacceptable.
Summary of the invention
The embodiment of the invention provides a kind of EPON maintaining method, optical network unit and optical line terminal, can't detect the also problem of isolated fault optical module in the optical line terminal side to solve in the prior art.
A kind of maintaining method of EPON comprises:
The lasting holding time of optical line terminal monitoring uplink, and when surpassing setting threshold, described lasting holding time detects the fault optical network unit that continues to take described uplink monitoring, the method of the described fault optical network unit of described detection is: detecting the time that continues to take described uplink earlier surpasses the optical network unit of setting threshold, judge again by the compensation delay of adjusting this optical network unit and whether can change lasting holding time described uplink, if then be the normal light network element, otherwise be the fault optical network unit;
Optical line terminal indicates described fault optical network unit to close the transtation mission circuit power supply.
A kind of optical line terminal that is used to carry out said method comprises optical module, and described optical line terminal also comprises:
The Breakdown Maintenance module, the uplink of monitoring described optical module connection continues the malfunction that holding time surpasses setting threshold, and detection failure source end also carries out Breakdown Maintenance.
In the described EPON maintaining method of the embodiment of the invention, whether normal failure light emission takes place by the monitoring of optical link cell side, and carry out the detection and the maintenance of fault optical network unit, malfunction monitoring and testing mechanism are realized simple and reliable, have realized the isolation and the Breakdown Maintenance of normal failure light emission optical network unit.
Description of drawings
Fig. 1 is existing PON schematic network structure;
Fig. 2 is existing OLT structural representation;
Fig. 3 is existing ONU structural representation;
The normal failure light emission that Fig. 4, Fig. 5 provide for the embodiment of the invention detects safeguards schematic flow sheet;
A kind of OLT structural representation that Fig. 6 provides for the embodiment of the invention;
A kind of ONU structural representation that Fig. 7 provides for the embodiment of the invention.
Embodiment
Be to guarantee the normal operation of network, when occur certain or some ONU/ONT (hereinafter to be referred as ONU) terminals be in normal luminance because of the burst disabler time, need the ONU of fault be isolated, make it not have influence on the ONU user of other operate as normal.
At first, need OLT can detect and judge the ONU of normal failure light emission, the embodiment of the invention provides following testing mechanism according to the different normal failure light emission type of the optical module of ONU/ONT:
Fault type one, have only the optical module burst disabler of an ONU, be in normal luminance, but can also send normal data;
In this case, because OLT does not receive any information of other normal ONU for a long time, think that then other normal ONU all go offline, cause other normal ONU all not register, and all right normal registration of this ONU of Chang Faguang, and to OLT transmission data or control signaling, so the SD signal of OLT optical module is normal height (the maintenance high level is constant) certainly.
If under normal circumstances have only an ONU to reach the standard grade, other ONU roll off the production line, and during situations such as for example no start of user, power failure, the ONU that reaches the standard grade intermittently opens optical module in the OLT distributed time slot, and the SD signal of OLT optical module should be a pulse signal.
OLT is according to having only a registration among all ONT, other all go offline, and this moment, OLT optical module SD signal was normal when high, can determine the ONU optical module fault in the current registration, was in normal luminance.Owing to can correctly receive the information that this ONU sends, therefore directly can determine faulted ONU, at this moment, if faulted ONU is closed, then other ONU just can operate as normal.
Fault type two, have only optical module burst disabler, be in normal luminance, and can not send normal data, transmission be mixed and disorderly noise signal fully;
All in this case ONU (ONU that comprises this optical module fault) can all go offline, and do not register.And the SD signal of OLT optical module is normal height (the maintenance high level is constant) certainly at this moment.
After this situation occurring, malfunction has appearred though OLT can judge, but can not judge faulted ONU at once, can close all ONU this moment earlier, and then ONU opened one by one, detect its operating state, if certain ONU can not normal registration, the optical module that this ONU is described so is fault, close this faulted ONU after system can recover normal.
Fault type three, two or more optical modules burst disablers are in normal luminance (transmission may be normal data, also may be noise signal);
OLT can't correctly receive the information of any ONU in this case, so all ONU (ONU that comprises the optical module fault) can all go offline, and does not register, and this moment, the SD signal of OLT optical module also was normal height (keeps high level constant).
After top this situation occurring, OLT can not judge faulted ONU equally at once, and also can close all ONU earlier this moment, and then ONU is opened one by one, detect its operating state, if certain ONU can not normal registration, but or can normal registration SD signal often high, the optical module that this ONU so all is described is fault, OLT says the word and closes this ONU optical module, finish when all ONU detect, OLT just can open other normal ONU, and system restoration is normal.
In the technical scheme that the embodiment of the invention provides, realize detecting control by OLT to the mode that ONU sends out code, though optical module all has unlatching/shutoff control signal, but optical module is likely not response external control signal when fault, close the transmission power supply of optical module so comparatively feasible a kind of way is exactly indication fault ONU, optical module can also normal received signal like this.If but the optical module receiving unit of faulted ONU also breaks down in the time of can't receiving the out code that OLT sends, can open continuously, turn-off several times by control OLT optical module in this case, the ONU end can be received a plurality of consecutive pulses signal instructions, with this as closing the alternative command that sends power supply.
In sum, whether OLT can be continuously high level failure judgement state according to the output signal of this sidelight module SD terminals, then by carrying out the detection of faulted ONU to the ONU sending controling instruction and carrying out Breakdown Maintenance, safeguard that specifically handling process can be according to setting cycle startup regularly with the needs of property performance period monitoring, also can Automatic Cycle monitor, be that example is elaborated below with the circulatory monitoring, concrete handling process comprises the steps: as shown in Figure 4
S1, OLT detect the lasting holding time of uplink;
OLT detects according to the output signal of this sidelight module SD terminals usually, and when uplink had light signal to arrive, the output signal of SD terminals was a high level, by detecting the duration of high level, can obtain the lasting holding time of uplink.
S2, judge to continue holding time and whether surpass setting threshold, if, then give optical network unit according to the parameter that preset threshold issues compensation delay by OLT, continue holding time then continue S3 if also can't change; Otherwise return step S1; This setting threshold is the time slot scope that OLT licenses to the ONU upstream data.
Compensation delay is the internal delay time of optical network unit, by optical line terminal setting and control.The purpose of this parameter is the time-delay uplink, makes the up data of ONU reach optical line terminal with identical phase place.The time of advent of optical network unit transmission may be because the reason drift of aging or temperature change.Therefore, adjust compensation delay and can solve this drift, but then invalid for the faulted ONU of Chang Faguang.
Certainly, the parameter that also can not issue compensation delay is given optical network unit, directly continues S3, still can detect faulted ONU and safeguards.
S3, judge currently whether have only an ONU to be in login state, if then continue S4; Otherwise go to step S6;
S4, OLT determine this ONU fault, and issue to close to this ONU and send the power supply instruction;
After OLT issues the powered-down instruction, judge whether data feedback channel is idle, if then this ONU receiving unit is normal, and correct execution the powered-down instruction, otherwise this ONU receiving unit also breaks down, and can't instruct by the correct execution powered-down, and OLT then can control optical module and open continuously, turn-offs several times, issue pulse command to this ONU, after ONU received pulse signal, the SD end was exported corresponding pulse detection signals simultaneously, and ONU end control device can cut out optical module according to this pulse signal.
S5, OLT return step S1 after the maintenance centre reports faulted ONU information; If periodically monitoring finishes after then this step is finished, wait for next monitoring periods.
S6, judge whether all ONU roll off the production line, promptly currently be in login state, if then continue S7 without any ONU; Otherwise go to step S9;
S7, OLT detect and closing fault ONU;
S8, return step S5 after opening other normal ONU;
S9, system are normal and report the maintenance centre, return step S1; If periodically monitoring finishes after then this step is finished, wait for next monitoring periods.
As shown in Figure 5, among the above-mentioned steps S7, OLT detects and closes all faulted ONUs by following concrete steps:
S701, OLT close the control message that sends power supply to all ONU broadcasting of current connection;
S702, judge that uplink is whether idle, if go to step S704; Otherwise continue step S703;
S703, OLT issue to all ONU of current connection and close the pulse signal that sends power supply by force;
If the receiving unit of all ONU is normal, then can receive and carry out to close sending power supply control message, uplink free time at this moment, otherwise, there is the ONU of receiving unit fault, then must close the ONU of this receiving unit fault by out code by force.
OLT changes the pulse enable signal into by the transmission enable signal with optical module, thereby the control optical module is exported described pulse signal.
During actual enforcement, also can return step S702 after the step S703 and reaffirm whether uplink is idle.
S704, obtain the information of all ONU of current connection, and therefrom select an ONU to be measured;
S705, send to ONU to be measured and to open the lasting holding time that sends the power supply instruction and begin to detect uplink;
S706, monitor the lasting holding time that this ONU to be measured takies uplink and whether surpass the setting-up time threshold value, if then further unusual optical network unit is compensated time-delay adjustment, can be defined as normal failure light emission after the compensation delay adjustment is invalid, otherwise go to step S708;
When this ONU just often, after the transtation mission circuit power supply of ONU is opened, carry out normal register flow path and take data feedback channel according to distributed time slot, therefore otherwise behind the transtation mission circuit power supply opening, just begin to continue to take data feedback channel, take the lasting holding time of uplink or further compensate time-delay adjustment again and can judge whether to break down by monitoring this ONU to be measured.Here need to prove,,, so uplink is not exerted an influence, do not belong to the detection maintenance span of normal failure light emission if its data feedback channel holding time is zero even this ONU to be measured can't register.
Remain by detecting the high level lasting time monitoring data feedback channel holding time of optical module SD end output signal, the time threshold of setting equals the ascending time slot scope that OLT distributes for each ONU, if this ONU to be measured continues to take uplink according to distributed time slot, then when finishing, this time slot closes automatically, the lasting holding time of uplink is less than the time threshold of setting, otherwise, after the transmission power supply of this ONU to be measured is opened, continue to take uplink, when holding time surpasses the time threshold of setting, can judge that this ONU to be measured sends partial fault.
S707, this ONU to be measured of record are faulted ONU;
S708, send to close to this ONU to be measured and send power supply control message;
Send power supply control message and expand, perhaps define according to existing protocol by the control message or the Operation and Maintenance message that define in the existing EPON.
In testing process, the transtation mission circuit power supply of the normal ONU that has detected also must be closed.
S709, judge whether to have detected all ONU to be measured, if then continue; Otherwise execution in step S8;
S710, from the ONU that all do not detect, select again to return step S705 behind the next ONU to be measured.
By above-mentioned cycle detection, OLT can detect all faulted ONUs, comprises sending partial fault but the normal ONU of receiving unit, and receives and send all ONU of fault of part.
In above-mentioned detection processing procedure, the OLT record also reports faulted ONU information, has closed all faulted ONUs and has opened all normal ONU once more, and the PON network recovery is normally moved.
In the above-mentioned monitoring and maintenance process, eliminated normal failure light emission ONU, detect the faulted ONU that to register if desired simultaneously, the described method of the embodiment of the invention can be between step S705 and step S706, increase the step of inquiry and registration information to judge whether ONU to be measured registers,, continues ONU step S706 monitoring uplink holding time if registering, otherwise write down this ONU to be measured is to go to step S708 behind the faulted ONU, the transmission that ONU to be measured does not register this ONU to be measured of explanation partly completely loses function, normal signal can not be sent and also noise can't be sent, though the use to uplink does not impact, still should write down this faulted ONU and report the maintenance centre.
As shown in Figure 6, the embodiment of the invention also provides a kind of OLT60 structure, comprises optical module 61 and Service Processing Module 62, also comprises:
Malfunction monitoring submodule 631 connects described optical module 61, is used to monitor described malfunction and exports fault indication signal;
Troubleshooting submodule 632 carries out the detection of source of trouble end and carries out Breakdown Maintenance according to described fault indication signal;
Fault information reporting submodule 633 is used for detected source of trouble client information is reported the maintenance centre.
As shown in Figure 7, the embodiment of the invention also provides a kind of ONU70 that cooperates this OLT60 structure, comprises optical module 71 and Service Processing Module 72, also comprises:
Send power module 73, connect described optical module 71, be used for providing working power to the transtation mission circuit of described optical module 71;
Send energy supply control module 74, connect described transmission power module 73, be used for opening or turn-off described transmission power module 73 according to the external power source control command;
Receive power module 75, connect described optical module 71, be used for providing the receiving circuit working power to described optical module 71;
Service Processing Module 72 is connected described optical module 71 and sends between the energy supply control module 74, is used to receive described external power source control command and is transmitted to described transmission energy supply control module 74;
Comprise in the described Service Processing Module 72: instruction recognin module 721 is used to discern described external power source control command and is transmitted to described energy supply control module.
Sending energy supply control module 74 can specifically comprise:
Instruction analyzing sub-module 741 connects described instruction recognin module 721, is used to resolve described external power source control command;
Instruction implementation sub-module 742 is connected between described instruction analyzing sub-module 741 and the transmission power module 73, is used for generating corresponding control signal and exporting to transmission power module 73 according to analysis result.
Comprise the SD terminals in the optical module 71, be used to export the detection signal that whether has light signal to arrive;
Sending energy supply control module 74 also comprises: pulse signal monitoring submodule 743, connect between described SD terminals and the instruction implementation sub-module 742, and when the detection signal of this SD end output signal is the pulse signal of setting, indicate described instruction implementation sub-module 742 to close described transmission power module 73.
Among the above-mentioned ONU, the transmission power supply of optical module and reception power supply separately provide, and sending the controlled module controls of power supply can open and close.When abnormal conditions occurring, OLT can issue and close optical module and instruct to certain ONU or all ONU, the ONU control module is received the transmission power supply of closing optical module after this instruction, concrete out code is by existing control message, OAM (Operation And Maintenance, Operation and Maintenance) message expansion, perhaps carry according to the self-defined grade of existing protocol, concrete expansion and definition mode are that present technique field personnel know, and repeat no more here.
Sending energy supply control module can be provided with separately, also can merge with the existing control module of OLT to be provided with.
By the supporting use embodiment of the invention above-mentioned OLT and ONU, in the PON network, form a set of fault maintenance system, can realize that the normal failure light emission of PON network detects and maintenance.
The described technical scheme of the embodiment of the invention realizes simple, and the testing mechanism on the OLT is also uncomplicated, is easy to just can realize, last only need of ONU separated the power supply circuits of optical module, does On/Off control separately to sending power supply.Compare with existing passive optical network, cost does not have to increase substantially, has realized the detection and the isolation of faulted ONU, has improved the reliability and stability of PON system greatly, has improved the maintainability of ONU terminal simultaneously yet.
In the described EPON maintaining method of the embodiment of the invention, whether normal failure light emission takes place by the monitoring of optical link cell side, and carry out the detection and the maintenance of fault optical network unit, malfunction monitoring and testing mechanism are realized simple and reliable, have realized the isolation and the Breakdown Maintenance of normal failure light emission optical network unit; Further, the described method of the embodiment of the invention can detect the fault optical network unit that can't register simultaneously by inquiry and registration information, has further improved the reliability and stability of EPON, has also improved the maintainability of optical network unit simultaneously; The maintaining method of the described EPON of the embodiment of the invention can also can be realized the Automatic Cycle monitoring according to the monitoring of setting cycle property performance period, makes things convenient for the needs of different application scene; For realizing technique scheme, the embodiment of the invention provides the optical line terminal that can carry out malfunction monitoring and Breakdown Maintenance, and matching used optical network unit, does not have substantially to increase at cost.
Obviously, those skilled in the art can carry out various changes and modification to the embodiment of the invention and not break away from the spirit and scope of the embodiment of the invention.Like this, if these of the embodiment of the invention are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (12)
1. the maintaining method of an EPON is characterized in that, comprising:
The lasting holding time of optical line terminal monitoring uplink, and when surpassing setting threshold, described lasting holding time detects the fault optical network unit that continues to take described uplink monitoring, the method of the described fault optical network unit of described detection is: detecting the time that continues to take described uplink earlier surpasses the optical network unit of setting threshold, judge again by the compensation delay of adjusting this optical network unit and whether can change lasting holding time described uplink, if then be the normal light network element, otherwise be the fault optical network unit;
Optical line terminal indicates described fault optical network unit to close the transtation mission circuit power supply.
2. the method for claim 1 is characterized in that, described detection continues to take the fault optical network unit of described uplink, and the method for indicating described fault optical network unit to close the transtation mission circuit power supply specifically comprises:
Judge the current optical network unit that whether only has a login state,, indicate this fault optical network unit to close the transtation mission circuit power supply if then this optical network unit to be measured of record is the fault optical network unit; Otherwise
Whether all optical network units of judging current connection all roll off the production line, if then detect the also definite fault optical network unit wherein of each optical network unit of current connection respectively, indicate all fault optical network units to close the transtation mission circuit power supply; Otherwise confirm that the network operation is normal.
3. method as claimed in claim 2 is characterized in that, described each optical network unit that detects current connection is respectively also determined fault optical network unit wherein, and the method for indicating all fault optical network units to close the transtation mission circuit power supply specifically comprises:
The control message of transtation mission circuit power supply is closed in broadcasting, and judges whether described uplink is idle, if then select an optical network unit to be measured one by one from all optical network units of current connection; Otherwise after being used for indicating the pulse signal instruction of closing the transtation mission circuit power supply, each optical network unit transmission of current connection selects an optical network unit to be measured one by one from all optical network units of current connection again;
Each optical network unit to be measured is sent the control message of opening the transtation mission circuit power supply earlier, and judge whether the time that optical network unit to be measured continues to take described uplink surpass setting threshold, be the fault optical network unit if then write down optical network unit to be measured; Otherwise send the control message of closing the transtation mission circuit power supply to optical network unit to be measured;
After having detected all optical network units, send the control message of opening the transtation mission circuit power supply to each non-fault optical network unit.
4. method as claimed in claim 3, it is characterized in that, described method also comprises: when the time that optical network unit to be measured continues to take described uplink surpasses setting threshold, judge by the compensation delay of adjusting this optical network unit whether to change lasting holding time again, if then send the control message of closing the transtation mission circuit power supply to optical network unit to be measured to described uplink; Otherwise write down optical network unit to be measured again is the fault optical network unit.
5. as claim 1,3 or 4 described methods, it is characterized in that described setting threshold refers to that optical line terminal licenses to the scope of the ascending time slot of optical network unit.
6. as claim 3 or 4 described methods, it is characterized in that, described to each optical network unit to be measured send earlier open the control message of transtation mission circuit power supply after, whether also inquire about optical network unit to be measured registers, whether surpass setting threshold if then judge the time that optical network unit to be measured continues to take described uplink again, otherwise this optical network unit to be measured of record is the fault optical network unit.
7. method as claimed in claim 3 is characterized in that, described optical line terminal is exported described pulse signal by send enable/disable signal controlling optical module to the optical module input pulse.
8. method as claimed in claim 3 is characterized in that, described method also comprises: optical line terminal moves the step of normal or fault optical network unit information to maintenance centre's report network.
9. one kind is used for the optical line terminal that enforcement of rights requires 1 described EPON maintaining method, comprises optical module, it is characterized in that, described optical line terminal also comprises:
The Breakdown Maintenance module is used to monitor the malfunction of the lasting holding time of uplink of described optical module connection above setting threshold, and detection failure source end also carries out Breakdown Maintenance.
10. optical line terminal as claimed in claim 9 is characterized in that, described Breakdown Maintenance module comprises:
The malfunction monitoring submodule is used to monitor the malfunction of described optical module and exports fault indication signal;
The troubleshooting submodule carries out the detection of source of trouble end and carries out Breakdown Maintenance according to described fault indication signal;
The fault information reporting submodule is used for detected source of trouble client information is reported the maintenance centre.
11. optical line terminal as claimed in claim 10 is characterized in that, described optical line terminal also comprises: Service Processing Module is used to receive dependent failure processing instruction that the troubleshooting submodule produces and sends by optical module.
12. optical line terminal as claimed in claim 10 is characterized in that, described optical module comprises:
The SD terminals connect described malfunction monitoring submodule, are used to export the detection signal that light signal arrives;
The enable/disable signal terminal connects described troubleshooting submodule, receives the pulse enable/inhibit signal of troubleshooting submodule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200780000412.3A CN101317349B (en) | 2006-05-18 | 2007-04-16 | Passive optical network maintenance method, optical network unit and optical line terminal |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610078267.8 | 2006-05-18 | ||
| CNB2006100782678A CN100536381C (en) | 2005-12-23 | 2006-05-18 | Passive light network maintenance method and light network unit and light circuit terminal |
| PCT/CN2007/001232 WO2007134520A1 (en) | 2006-05-18 | 2007-04-16 | A method for maintaining the passive optical network, an optical network element and an optical line terminal |
| CN200780000412.3A CN101317349B (en) | 2006-05-18 | 2007-04-16 | Passive optical network maintenance method, optical network unit and optical line terminal |
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| Publication Number | Publication Date |
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| CN101317349A CN101317349A (en) | 2008-12-03 |
| CN101317349B true CN101317349B (en) | 2011-07-06 |
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| CN200780000412.3A Active CN101317349B (en) | 2006-05-18 | 2007-04-16 | Passive optical network maintenance method, optical network unit and optical line terminal |
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| US8655168B2 (en) | 2005-12-23 | 2014-02-18 | Huawei Technologies Co., Ltd. | Passive optical network maintenance method, an optical network unit, and an optical line terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102148682B (en) * | 2010-02-08 | 2016-02-10 | 中兴通讯股份有限公司 | A kind of method and system that the abnormal optical network unit of luminescence is correctly located |
| CN103840976B (en) * | 2014-02-28 | 2017-06-20 | 华为技术有限公司 | Communication means, light device and the network equipment |
| CN105472482B (en) * | 2014-08-18 | 2020-03-17 | 中兴通讯股份有限公司 | Method for identifying state of optical module in ONU (optical network Unit) and ONU |
| CN115021809B (en) * | 2022-06-02 | 2024-04-16 | 索尔思光电（成都）有限公司 | Method and system for accelerating locking of optical module signals |
| CN114978895B (en) * | 2022-07-25 | 2022-12-13 | 深圳市亿联无限科技有限公司 | Starting method, system, equipment and computer readable storage medium |
| CN116436522B (en) * | 2023-06-14 | 2023-08-15 | 国网天津市电力公司蓟州供电分公司 | Fault positioning device and positioning method for power communication access network |
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| JPH08251102A (en) * | 1995-03-08 | 1996-09-27 | Fujitsu Ltd | Optical transmission device |
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| US6650839B1 (en) * | 2000-05-23 | 2003-11-18 | Quantum Bridge Communications, Inc. | Method and apparatus for optical media access protection in a passive optical network |
| CN1325204A (en) * | 2000-08-26 | 2001-12-05 | 深圳市中兴通讯股份有限公司 | Passive light network transmission system and its delay control method |
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| US8655168B2 (en) | 2005-12-23 | 2014-02-18 | Huawei Technologies Co., Ltd. | Passive optical network maintenance method, an optical network unit, and an optical line terminal |
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| WO2007134520A1 (en) | 2007-11-29 |
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