CN102006118B - Method for isolating long-emitting optical network units (ONU) in gigabit passive optical network (GPON) - Google Patents
Method for isolating long-emitting optical network units (ONU) in gigabit passive optical network (GPON) Download PDFInfo
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- CN102006118B CN102006118B CN2010105666970A CN201010566697A CN102006118B CN 102006118 B CN102006118 B CN 102006118B CN 2010105666970 A CN2010105666970 A CN 2010105666970A CN 201010566697 A CN201010566697 A CN 201010566697A CN 102006118 B CN102006118 B CN 102006118B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0081—Fault tolerance; Redundancy; Recovery; Reconfigurability
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Abstract
The invention discloses a method for isolating long-emitting optical network units (ONU) in a gigabit passive optical network (GPON) system. An optical line terminal (OLT) turns off the lasers of all ONU in the GPON system one by one and then delays to turn on the lasers in the mode of sending a physical layer operation, administration and maintenance (PLAOM) message; after the laser of an ONU is turned off, the OLT queries the serial numbers of other ONUs, acquires the judging result whether the current ONU is a long-emitting ONU on the basis of the fact whether the OLT can receive the serial numbers replied by other ONUs when the laser of the current ONU is turned off; and when the judging result shows that the ONU is a long-emitting ONU, the laser of the ONU is permanently turned off in the mode of sending the PLAOM message until the judgment on all ONUs is finished. By using the method of the invention, the isolation of long-emitting ONUs can be realized in the GPON system, thereby ensuring the service safety of the GPON system.
Description
Technical field
The present invention relates to ensure the method for GPON system business safety, be specifically related to the method for isolation long luminance ONU in the GPON system.
Background technology
GPON is a kind of technology that develops rapidly in recent years, and GPON (Gigabit passive optical network) is gigabit by name/gigabit passive fiber optic network entirely, also is a kind of passive passive type fiberoptical networking.For other PON standard, the GPON standard provides unprecedented high bandwidth, and downstream rate is up to 2.5Gbit/s, and its asymmetric property more can adapt to broadband data service.The full-service guarantee of QoS is provided, the ability that the grade of service well is provided, supports QoS assurance and Full-Services access is arranged.Transmission range can reach 20 kilometers, thus have high bandwidth, at a high speed, high efficiency of transmission, cover on a large scale, user interface is abundant etc. numerous characteristics, be considered as realizing broadband, the desirable technique that synthesization is transformed of Access Network business by most of operators.
In the GPON system, the uplink and downlink direction adopts different operation wavelengths, and the operating wavelength range of down direction is 1480～1500nm, is generally 1490nm, and the operating wavelength range of up direction is 1260-1360nm, is generally 1310nm.Uplink data frames and downlink data frame synchronization, upstream is shared upstream bandwidth in time-multiplexed mode, and OLT has indicated the permission position of upstream in uplink data frames take byte as unit in downlink data frame.OLT is send finger in PCBd, and these pointers have indicated each ONU to send the start and end time of upstream.Only have so at any time an ONU can access medium, can not bump in normal operation.In case have ONU to send data flow not according to the bandwidth mapping mode of OLT, just may cause whole PON mouth all can't work." rogue " ONU is exactly so a kind of ONU, and long luminance ONU is a kind of of " rogue " ONU.
Long luminance ONU refers to that out of order laser generator sends light signal (continuous or interruption) to optical fiber, perhaps fault (as: CPU hangs up, the configuration of mistake the control signal among transmission time and the GPON TC circuitry) has occured and a kind of phenomenon of producing in the SoC of ONU.If the laser of a certain ONU has the phenomenon of long hair light, can cause all ONU cisco unity malfunction all on the whole PON mouth.Therefore, how automatically to detect and isolate the rogue ONU of long hair light, thereby the service security that ensures the GPON system is very important.
Summary of the invention
Technical problem to be solved by this invention is to solve how automatically to detect in the GPON system and isolate long luminance ONU, thereby ensures the problem of the service security of GPON system.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention provides the method for isolation long luminance ONU in a kind of GPON system, may further comprise the steps:
The sequence number of A10, all ONU of OLT periodic queries;
A20, OLT by sending the mode of PLAOM message, close first the laser of all ONU in the Time Delay Opening GPON system according to the sequence number of the ONU that receives one by one again; After the laser of ONU cuts out, OLT inquires about the sequence number of other ONU, and whether OLT can receive that sequence number that other ONU reply is as foundation when closing take the laser of current ONU, whether obtain current ONU is the judged result of long luminance ONU, when judged result shows that this ONU is long luminance ONU, then forever close the laser of this ONU by the mode that sends PLAOM message, until finish all ONU.
In said method, in the steps A 10, OLT sets up according to the sequence number of the ONU that acquires and authorizes ONU table and online ONU table; In the steps A 20, at first traversal is authorized the ONU table, all ONU in the his-and-hers watches close first its laser of Time Delay Opening one by one again, if showing, judged result authorizes when not having long luminance ONU in the ONU table, then travel through again online ONU table, ONU in the his-and-hers watches closes first its laser of Time Delay Opening one by one again, until finish all ONU.
In said method, if showing, the judged result in the steps A 20 authorizes when all not having long luminance ONU in ONU table and the online ONU table, then OLT sends broadcasting PLOAM message, close the laser of all ONU that are attached thereto, then traversal is authorized the ONU table, each ONU in the his-and-hers watches sends PLOAM message one by one, opens its laser.
In said method, before steps A 10, carry out following steps:
B10, OLT detect the operating state of its PON mouth;
B20, whether receive that with the PON mouth LOS alarm obtains the judged result whether this PON mouth is in normal operating conditions, be in normal operating conditions when judged result shows this PON mouth, then turn step B10; Otherwise turn step B30;
B30, detect luminous power by the RSSI interface, if the luminous power that detects is 0, then turn step B40; Otherwise turn steps A 10;
B40, OLT inquire about the sequence number of ONU again, if can not obtain the sequence number of any ONU, then turn step B50; Otherwise, turn step B10;
B50, again detect luminous power by RSSI, if luminous power is 0, then turn step B10; Otherwise, turn steps A 10.
In said method, ONU is as follows to the processing procedure of PLOAM message in the steps A 20:
After the PLOAM message of C10, ONU reception from OLT, judge that whether this PLOAM message is DISABLE SN message, if not DISABLE SN message, then ignores this PLOAM message; Otherwise, turn step C20;
C20, judge whether PLOAM message is broadcast, if broadcast then turns step C50; Otherwise, turn step C30;
C30, judge that whether the SN of the ONU that carries in the PLOAM message conforms to the SN of self, if do not conform to, does not then do any operation; Otherwise, turn step C40;
Order ID in C40, the judgement PLOAM message is DISABLE or ENABLE, if ENABLE, then ONU opens its laser, if DISABLE, then ONU closes its laser;
C50, the content of resolving PLOAM message and obtaining to order ID, if order ID is ENABLE, then ONU opens its laser; If DISABLE, then ONU closes its laser.
The present invention, by closing the laser of ONU, and reply sequence number detection by other ONU whether go out this ONU be long luminance ONU according to whether receiving, for long luminance ONU and forever close its laser, thereby realize the isolation of the GPON medium-length hair light ONU of system, guarantee the service security of GPON system.
Description of drawings
Fig. 1 is the flow chart that OLT finds ONU and sets up online ONU table and authorize ONU to show;
Fig. 2 is PON mouth operating state overhaul flow chart;
Fig. 3 is the flow chart of isolation long luminance ONU;
Fig. 4 is that ONU is to the process chart of Ploam message.
Embodiment
The invention provides the method for isolation long luminance ONU in a kind of GPON system, OLT is according to the sequence number of all ONU in the certain time interval inquiry GPON system, and by sending the mode of PLAOM message, one by one all ONU are closed first its laser of Time Delay Opening again; After the laser of ONU cuts out, OLT starts other ONU sequence number instructions of inquiry, whether OLT can receive that the sequence number of other ONU answers is as foundation when closing take the laser of current ONU, whether be the judged result of long luminance ONU, then forever close the laser of this ONU when judged result shows that this ONU is long luminance ONU by the mode that sends PLAOM message if obtaining current ONU.
Below in conjunction with accompanying drawing the present invention is made detailed explanation.
As a preferred embodiment of the present invention, the method for isolation long luminance ONU comprises that OLT obtains the sequence number SN of ONU and sets up process, the PON mouth operating state testing process that online ONU shows and mandate ONU shows and three steps of process that detect long luminance ONU and isolate in the GPON system.
As shown in Figure 1, OLT obtains the sequence number SN of ONU and sets up online ONU table and authorize the process of ONU table as follows:
In the GPON system, OLT at first inquires about the sequence number of all ONU in the GPON system by the mode that sends standard P LOAM message with certain frequency, and online but unactivated n ONU responds PLOAM message and report its sequence number SN1, SN2 ... SNn.The ONU that activates can not respond the SN query messages.The existence of long luminance ONU is arranged, and just not having ONU is in state of activation under this PON mouth.Whether OLT reports webmaster after receiving the sequence number of ONU, and webmaster checks the legitimacy of the ONU that offers on all one by one, thereby determine to authorize to the ONU of corresponding SN, accordingly, sets up two tables at OLT: authorize ONU table and online ONU table.The SN information of all legal ONU is saved in above process authorizes (these ONU may be online, also might be not online) in the ONU table; The SN information of current online ONU then is saved in the online ONU table (what have among these online ONU is authorized to, and that have then may be the newfound ONU that also is not authorized to).
The PON mouth that links to each other with ONU has three kinds of operating states: normal operating conditions, abnormal operating state and uncertain state.Abnormal operating state refers to cisco unity malfunction of PON mouth, such as having produced LOS alarm etc.; Uncertain state refers to can not determine whether the PON mouth can work, for example the state behind the normal off-line of all ONU.The PON mouth is the Check processing process that does not need to start long luminance ONU under normal operating state, and abnormal operating state and nondeterministic statement then need to have determined whether that by RSSI luminous power detection module ONU is online.
PON mouth operating state testing process as shown in Figure 2.
When the PON mouth is in normal operating conditions, if produced unusual (such as having produced LOS alarm etc.) then represented that the PON mouth enters into abnormal work state (this moment, OLT detected the LOS alarm), at this moment, start the power measurement that RSSI carries out the PON mouth, if RSSI has detected light signal, and the PON mouth of this moment is at the abnormal work state, and explanation may have long luminance ONU to exist, and needs to start the detection of long luminance ONU.If luminous power is 0, illustrate that the PON mouth is nondeterministic statement, at this moment, OLT is the SN of cycle polling ONU again, and see the SN that whether can obtain ONU or activate ONU, if can not, then again start RSSI and check that the PON mouth has or not light signal; If can find ONU, then the PON mouth turns back to normal operating conditions, otherwise, illustrate that not have ONU online.For avoiding extra CPU expense, normal operating conditions and nondeterministic statement do not need to carry out long luminance ONU and detect.
When the PON mouth is in abnormal operating state, start that long luminance ONU detects and isolation, concrete steps as shown in Figure 3, long luminance ONU detect and isolation processes in employed PLOAM message format and ONU state define referring to table 1 and table 2.
The method of isolation long luminance ONU is as follows:
The sequence number of A10, all ONU of OLT periodic queries, namely OLT regularly sends the instruction of the sequence number of all ONU in the inquiry GPON system by standard P LOAM message, and sets up online ONU table and authorize the ONU table.
A20, OLT by sending the mode of PLAOM message, close first the laser of all ONU in the Time Delay Opening GPON system according to the sequence number of the ONU that receives one by one again; After the laser of ONU cuts out, OLT starts other ONU sequence number instructions of inquiry, and whether OLT can receive that sequence number that other ONU reply is as foundation when closing take the laser of current ONU, whether obtain current ONU is the judged result of long luminance ONU, when showing that this ONU is long luminance ONU, judged result then forever closes the laser of this ONU by the mode that sends PLAOM message, until finish all ONU.
The detailed step of steps A 20 is as follows:
A201, OLT at first read first ONU that authorizes in the ONU table, and the initial condition of this ONU is 01;
A202, take the SN of this ONU as according to sending order ID for this ONU as the PLOAM message of DISABLE (0xFF), ONU gets back to 07 state after receiving this PLOAM message, closes its laser;
A203, OLT send the instruction of the sequence number of other ONU of inquiry by the PLAOM message of standard;
A204, because the ONU that has closed laser can not affect other ONU work, after time-delay a period of time, if OLT can acquire the sequence number SN that other ONU reply, then can judge the pent ONU of laser is exactly long luminance ONU, so OLT forever closes the laser of this ONU again by the mode that sends PLAOM message, report simultaneously the SN of this ONU of webmaster, detect and finish.Otherwise, after if time-delay is waited for, OLT still can not obtain the sequence number that other ONU reply, then illustrate and also have long luminance ONU in the GPON system, the ONU that has been closed laser is not that the ONU of long hair light is (because close after the laser of this ONU, because the ONU of unknown long hair light is also at long hair light, therefore, can not find the ONU of any sequence number SN or activation at the OLT end), at this moment, it is the PLOAM message of ENABLE that OLT sends order ID to this ONU, enables this ONU, open its pent laser, make it to get back to 02 state or 03 state.
A205, OLT continue to read the next ONU that authorizes in the ONU table, and repeating step A202-A204 is until find and the isolation long luminance ONU.
If do not find long luminance ONU in authorizing the ONU table, namely long luminance ONU is an ONU who does not obtain the authorization, and then needs to detect the ONU among the online table ONU this moment.Mandate ONU is similar with detecting, at first, OLT reads the SN of the ONU in the online ONU table, if SN is not empty, then sending order ID for first ONU in this online ONU table is the PLOAM message of DISABLE, the initial condition of this ONU is after 01, ONU receives this PLOAM message, gets back to 07 state and closes its laser.Simultaneously, OLT sends the message of other ONU sequence numbers of inquiry SN.Equally, wait for time-delay after, if OLT can find ONU or activate ONU, illustrate that then sequence number is that the ONU of SN is long luminance ONU, OLT forever closes the laser of this ONU by the mode that sends PLAOM message, report simultaneously the SN of this ONU to webmaster, detects and finishes; If do not find ONU or activate ONU after waiting for time-delay, illustrate that then this ONU is not the ONU of long hair light, it is the PLOAM message of ENABLE that OLT can send order ID to this ONU, illustrate that then this ONU is not long luminance ONU, so sending order ID is the PLOAM message of ENABLE, enable this ONU, open its pent laser, make it to get back to 02 state or 03 state.Afterwards, read again the SN of next ONU in the online ONU table, until the complete online ONU table of poll, find long luminance ONU and with till its isolation.
If all do not find long luminance ONU in online ONU table and the mandate ONU table, then OLT at first issues the PLOAM message of a broadcasting of all ONU, and the order ID of this PLOAM message is DISABLE, after all ONU receive this PLOAM message, get back to 07 state, close its laser.Then the OLT traversal is authorized the ONU table, one by one each ONU that has authorized being sent order ID is the PLOAM message of ENABLE, enable ONU, ONU receives orders after ID is the PLOAM message of ENABLE, open laser and start working, get back to 02 state from 07, find range again, be activated to 05 state, normal operation.But this method can only be isolated the ONU of long hair light, can not locate the sequence number of the ONU of long hair light.
Table 1
The definition of table 2:ONU state
| 03 state | Serial-number-state |
| 04 state | Distance measuring states |
| 05 state | Running status |
| 06 state | The POPUP state |
| 07 state | The emergent stopping state |
In above-mentioned steps, ONU to the processing procedure of PLOAM message as shown in Figure 4.
After the PLOAM message of C10, ONU reception from OLT, at first judge that according to the content of the MESSAGE ID in the PLOAM message whether this PLOAM message is DISABLE SN message, if not DISABLE SN message, then ignores this PLOAM message; If DISABLE SN message then turns step C20.
C20, according to the content of ONU ID in the PLOAM message, judge whether PLOAM is broadcast, if broadcast then turns step C50; Otherwise, turn step C30.
C30, judge whether the SN of the ONU that carries in the PLOAM message conforms to the SN of self, if do not conform to, illustrate that then this OLT wants the ONU of DISABLE and non-self, ONU does not do any operation; Otherwise, illustrate that this message issues self just, turn step C40.
Order ID in C40, the judgement PLOAM message is DISABLE or ENABLE, if ENABLE, then ONU opens its laser, if DISABLE, then ONU closes its laser.
C50, the content of resolving PLOAM message and obtaining to order ID, if order ID is ENABLE, then ONU opens its laser; If DISABLE, then ONU closes its laser.
The PLOAM message that the present invention is based on standard realizes, PLOAM message is the standard that G.984.3 defines, and PLOAM message is responsible for realizing the functions such as the registration of ONU and ID distribution, range finding, Port ID distribution, encryption, state-detection, error rate supervision.Detect in the isolation processes at long luminance ONU, by the opening and closing of PLOAM message control ONU laser.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (4)
1.GPON the method for isolation long luminance ONU is characterized in that in the system, may further comprise the steps:
The sequence number of A10, all ONU of OLT periodic queries, OLT are set up according to the sequence number of the ONU that acquires and are authorized ONU table and online ONU table;
A20, OLT are according to the sequence number of the ONU that receives, and at first traversal is authorized the ONU table, and by sending the mode of PLAOM message, all ONU in the his-and-hers watches close first its laser of Time Delay Opening one by one again; After the laser of ONU cuts out, OLT inquires about the sequence number of other ONU, and whether OLT can receive that sequence number that other ONU reply is as foundation when closing take the laser of current ONU, whether obtain current ONU is the judged result of long luminance ONU, when judged result shows that this ONU is long luminance ONU, then forever close the laser of this ONU by the mode that sends PLAOM message, to authorizing the ONU table to travel through until finds and isolate long luminance ONU or traveled through authorize ONU show in all ONU; Authorize when not having long luminance ONU in the ONU table if judged result shows, then travel through online ONU table again, all ONU in the his-and-hers watches close first its laser of Time Delay Opening one by one again; After the laser of ONU cuts out, OLT inquires about the sequence number of other ONU, and whether OLT can receive that sequence number that other ONU reply is as foundation when closing take the laser of current ONU, whether obtain current ONU is the judged result of long luminance ONU, when judged result shows that this ONU is long luminance ONU, then forever close the laser of this ONU by the mode that sends PLAOM message, to online ONU table travel through until finds and isolate long luminance ONU or traveled through online ONU show in all ONU.
2. the method for isolation long luminance ONU in the GPON as claimed in claim 1 system, it is characterized in that, if showing, the judged result in the steps A 20 authorizes when all not having long luminance ONU in ONU table and the online ONU table, then OLT sends broadcasting PLOAM message, close the laser of all ONU that are attached thereto, then traversal is authorized the ONU table, and each ONU in the his-and-hers watches sends PLOAM message one by one, opens its laser.
3. the method for isolation long luminance ONU in the GPON as claimed in claim 1 system is characterized in that, carries out following steps before steps A 10:
B10, OLT detect the operating state of its PON mouth;
B20, whether receive that with the PON mouth LOS alarm obtains the judged result whether this PON mouth is in normal operating conditions, be in normal operating conditions when judged result shows this PON mouth, then turn step B10; Otherwise turn step B30;
B30, detect luminous power by the RSSI interface, if the luminous power that detects is 0, then turn step B40; Otherwise turn steps A 10;
B40, OLT inquire about the sequence number of ONU again, if can not obtain the sequence number of any ONU, then turn step B50; Otherwise, turn step B10;
B50, again detect luminous power by RSSI, if luminous power is 0, then turn step B10; Otherwise, turn steps A 10.
4. such as the method for isolation long luminance ONU in the described GPON of each claim of the claims 1 to 3 item system, it is characterized in that, ONU is as follows to the processing procedure of PLOAM message in the steps A 20:
After the PLOAM message of C10, ONU reception from OLT, judge that whether this PLOAM message is DISABLESN message, if not DISABLE SN message, then ignores this PLOAM message; Otherwise, turn step C20;
C20, judge whether PLOAM message is broadcast, if broadcast then turns step C50; Otherwise, turn step C30;
C30, judge that whether the SN of the ONU that carries in the PLOAM message conforms to the SN of self, if do not conform to, does not then do any operation; Otherwise, turn step C40;
Order ID in C40, the judgement PLOAM message is DISABLE or ENABLE, if ENABLE, then ONU opens its laser, if DISABLE, then ONU closes its laser;
C50, the content of resolving PLOAM message and obtaining to order ID, if order ID is ENABLE, then ONU opens its laser; If DISABLE, then ONU closes its laser.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105666970A CN102006118B (en) | 2010-12-01 | 2010-12-01 | Method for isolating long-emitting optical network units (ONU) in gigabit passive optical network (GPON) |
| MYPI2012700904A MY165483A (en) | 2010-12-01 | 2011-09-07 | Method for isolating long-emitting optical network units (onus) in gigabit passive optical network (gpon) system |
| PCT/CN2011/079415 WO2012071919A1 (en) | 2010-12-01 | 2011-09-07 | Method for isolating constant optical onu in gpon system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105666970A CN102006118B (en) | 2010-12-01 | 2010-12-01 | Method for isolating long-emitting optical network units (ONU) in gigabit passive optical network (GPON) |
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| CN102006118A CN102006118A (en) | 2011-04-06 |
| CN102006118B true CN102006118B (en) | 2013-05-01 |
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| Country | Link |
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| CN (1) | CN102006118B (en) |
| MY (1) | MY165483A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102006118B (en) * | 2010-12-01 | 2013-05-01 | 烽火通信科技股份有限公司 | Method for isolating long-emitting optical network units (ONU) in gigabit passive optical network (GPON) |
| EP2697982B1 (en) | 2011-04-13 | 2019-09-11 | ZTE Corporation | Mitigating rogue optical network unit (onu) behavior in a passive optical network (pon) |
| CN103597759B (en) * | 2011-04-13 | 2017-09-29 | 中兴通讯股份有限公司 | Mitigate in EPON（PON）In rogue's optical network unit（ONU）Behavior |
| CN102752041B (en) * | 2012-06-06 | 2015-04-08 | 烽火通信科技股份有限公司 | Method for detecting frequent-light-emission optical network units (ONUs) in gigabit passive optical network (GPON) system |
| US10033459B2 (en) * | 2013-02-15 | 2018-07-24 | Lantiq Deutschland Gmbh | System, method and apparatus for a rogue optics network unit |
| CN104065495A (en) * | 2013-03-18 | 2014-09-24 | 中兴通讯股份有限公司 | Long light emitting ONU judging method and device and passive optical network system |
| CN105516833B (en) * | 2016-02-29 | 2018-11-23 | 烽火通信科技股份有限公司 | The fault-tolerance approach and device of ONU state consistency are safeguarded in PON system |
| CN106936626B (en) * | 2017-01-23 | 2019-12-31 | 无锡雷华网络技术有限公司 | Fault solution method and system for rogue ONU in GPON system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1866791A (en) * | 2006-02-08 | 2006-11-22 | 华为技术有限公司 | Method and apparatus for testing passive optical network fault |
| CN101483792A (en) * | 2008-01-09 | 2009-07-15 | 中兴通讯股份有限公司 | Prohibiting/enabling method and system for optical network terminal |
| US7778543B2 (en) * | 2006-05-26 | 2010-08-17 | Alcatel Lucent | Passive optical network rogue optical network unit diagnostics |
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| CN102006118B (en) * | 2010-12-01 | 2013-05-01 | 烽火通信科技股份有限公司 | Method for isolating long-emitting optical network units (ONU) in gigabit passive optical network (GPON) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1866791A (en) * | 2006-02-08 | 2006-11-22 | 华为技术有限公司 | Method and apparatus for testing passive optical network fault |
| US7778543B2 (en) * | 2006-05-26 | 2010-08-17 | Alcatel Lucent | Passive optical network rogue optical network unit diagnostics |
| CN101483792A (en) * | 2008-01-09 | 2009-07-15 | 中兴通讯股份有限公司 | Prohibiting/enabling method and system for optical network terminal |
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| MY165483A (en) | 2018-03-23 |
| WO2012071919A1 (en) | 2012-06-07 |
| CN102006118A (en) | 2011-04-06 |
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