CN104079348A - Method for detecting long-time light emitting optical network units of Ethernet passive optical network - Google Patents
Method for detecting long-time light emitting optical network units of Ethernet passive optical network Download PDFInfo
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- CN104079348A CN104079348A CN201410281368.XA CN201410281368A CN104079348A CN 104079348 A CN104079348 A CN 104079348A CN 201410281368 A CN201410281368 A CN 201410281368A CN 104079348 A CN104079348 A CN 104079348A
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Abstract
The invention provides a method for detecting long-time light emitting optical network units of an Ethernet passive optical network. The method includes the steps that first, an optical line terminal periodically detects optical power values of all passive optical network ports in the free timeslot; if the optical power value of one passive optical network port in the free timeslot is smaller than the sensitivity of an optical receiver, it shows that the optical network unit under the passive optical network port emits light normally, and the first step is executed again to detect the next passive optical network port; if not, the next step is executed; third, if the optical power value of one passive optical network port in the free timeslot is larger than or equal to the sensitivity of the optical receiver, it is considered that a long-time light emitting optical network unit exists under the passive optical network port; fourth, the long-time light emitting optical network unit under the passive optical network port is located and isolated, and the first step is executed again to detect the next passive optical network port. Through the method, long-time light emitting ONUs in an EPON system can be automatically detected and isolated, and thus normal and stable operation of the system is guaranteed.
Description
Technical field
The present invention relates to ensure the method for EPON (Ethernet passive optical network) system business safety, be specifically related in EPON system, detect, locate, isolate the method for long luminance ONU (optical network unit).
Technical background
In EPON system, uplink and downlink direction adopts different operation wavelengths, and the operating wavelength range of up direction is 1260～1360nm, is generally 1310nm, and the operating wavelength range of down direction is 1480～1500nm, is generally 1490nm.Upstream is shared upstream bandwidth in time-multiplexed mode, and OLT (optical line terminal) gives ONU send window signal in downlink data frame, is used to refer to the start and end time that each ONU sends upstream.Like this, just only having an ONU at any time can be luminous, there will not be under normal circumstances the congested situation of light signal, if but have ONU not send data flow according to the time slot of stipulating in the message of windowing of OLT, will go to seize the operating time of other ONU, cause whole system normally to work.
Long luminance ONU refers to that out of order laser generator sends light signal continuously to optical fiber, and a kind of phenomenon producing.If there is the ONU of long hair light in EPON system, can cause all cisco unity malfunctions of all ONU on whole PON mouth.Therefore, if can automatically detect the ONU of long hair light and be isolated, significant for the job stability of whole EPON system.
Summary of the invention
Technical problem to be solved of the present invention is: Ethernet passive optical network long hair light optical network unit detection method is provided, and the method can detect and isolate EPON system medium-length hair light ONU automatically, thus the normal stable operation of the system of assurance.
In order to address the above problem, the technical solution used in the present invention is: Ethernet passive optical network long hair light optical network unit detection method, comprising:
A) optical line terminal periodically detects the free timeslot optical power value of each EPON mouth;
B) if the optical power value of free timeslot is less than the sensitivity of optical receiver, represent that the optical network unit under this EPON mouth is luminous normal, return to the detection of step a to next EPON mouth; Otherwise enter next step;
C), if the optical power value of free timeslot is more than or equal to optical receiver sensitivity, thinks under this EPON mouth and have long hair light optical network unit;
D) the long hair light optical network unit under this EPON mouth positioned and isolated, returning to step a and detect next EPON mouth.
Described method, the process of steps d location comprises: record the free timeslot optical power value P1 that current detection arrives, then close one by one the laser of all optical network units under this EPON mouth, often close one and all the free timeslot optical power value P2 of this EPON mouth is carried out to once record, by comparing the size of P1, P2, judge whether long hair light of current optical network unit, when being judged as YES, to the network management system of optical line terminal, carry out alarm.
Described method, relatively the method for the size of P1, P2 judgement long hair light optical network unit comprises:
D1), if P1=P2 shows that this optical network unit is not long hair light, continue to detect next optical network unit; Otherwise enter next step;
D2) if P1>P2 shows that this optical network unit is long hair light, closes its laser;
D3), if P2 >=optical receiver sensitivity shows also to exist long hair light optical network unit, return to steps d 1 and detect next optical network unit; Otherwise enter next step;
D4) if P2< optical receiver sensitivity shows that the long hair light optical network unit under this EPON mouth all finds, then open the laser of other normal optical network units, system is recovered normal work.
Described method, before step a detects, optical network unit is recorded in a table with not online optical network unit online by all, and table rolls off the production line on formation optical network unit; Before steps d detects P2, close one by one the optical network unit laser rolling off the production line in table on optical network unit.
Described method, before step a, also carry out following step:
S1) optical line terminal detects this EPON mouth long hair light detection option and whether enables (by network management configuration long hair light, enable/go to enable, be defaulted as and enable), enters if YES next step, otherwise detects next EPON mouth;
Whether the long hair light sense cycle that S2) optical line terminal detects this EPON mouth arrives, and enters if YES step a, otherwise return to step S1, detects next EPON mouth.
Described method, refer to-23.1dbm of the sensitivity of optical receiver.
Described method, the long hair light sense cycle of step S2 is 60s (default value can pass through network management configuration).
Advantage of the present invention: the present invention is by closing the laser of ONU, and according to after closing at some lasers, the variation of the free timeslot PON mouth optical power value detecting, whether judge this ONU is long luminance ONU, for long luminance ONU, forever close its laser, thereby realize the isolation of EPON system medium-length hair light ONU, guarantee the service security of EPON system.The present invention's prior art of comparing, can navigate to faulted ONU fast; By increasing fault detect switch, reach the effective control to fault detect On/Off simultaneously, with prevent from detecting for a long time cause to service impact.
Accompanying drawing explanation
Fig. 1 is for detecting long hair light fault logic figure.
Fig. 2 is long hair light diagnosis and elimination of breakdown logic diagram.
Embodiment
Below in conjunction with accompanying drawing, the present invention is made to the explanation on software flow:
The present invention mainly comprises three steps: 1) when system is normal, set up ONU on the table that rolls off the production line; 2) optical power value of PON mouth free timeslot is detected; 3) locate and isolate long luminance ONU;
A, OLT periodically detect the free timeslot optical power value of each PON (EPON) mouthful;
If the optical power value of b free timeslot is greater than optical receiver sensitivity, thinks and have long luminance ONU to exist;
If the optical power value of c free timeslot is less than the sensitivity of optical receiver, represent that the ONU under this PON mouth is luminous normal, continue the detection of next PON mouth;
When long luminance ONU having been detected and exist, we take following measures further to locate long luminance ONU, and concrete steps are as follows:
D, record the free timeslot optical power value P1 that the current long hair light time detects, then close one by one the laser of all ONU in EPON system, often close after the laser of an ONU, the optical power value of this PON mouth free timeslot is carried out to one query and record value is P2, by comparing the size of P1, P2, judge whether current ONU is long luminance ONU, when judged result shows that current ONU is long luminance ONU, to webmaster report and alarm; Concrete judgment mode is as follows:
If P1=P2:, show that this ONU is not long luminance ONU;
If P1>P2:, show that this ONU is long luminance ONU;
If P2> optical receiver sensitivity: show also to exist long luminance ONU, need to continue to check;
If P2< optical receiver sensitivity: show that long luminance ONU all finds, then open the laser of other normal ONU, system is recovered normal work.
In said method, while detecting long failure light emission, OLT software can be safeguarded the table that rolls off the production line on an ONU, all registration ONU are put in this table, when long failure light emission occurs, often there is the situation that a large amount of ONU go offline, now this table is used in the location to long luminance ONU in failure diagnosis.In steps d, one by one the ONU above rolling off the production line in table is sent and closes laser command, when finding long luminance ONU, report this ONU long hair light alarm.
In said method, before step a, carry out following steps:
S1, OLT detect only no enabling of this PON mouth long hair;
Whether S2, OLT detect this PON mouth long hair light sense cycle and arrive.
Claims (7)
1. Ethernet passive optical network long hair light optical network unit detection method, is characterized in that comprising:
A) optical line terminal periodically detects the free timeslot optical power value of each EPON mouth;
B) if the optical power value of free timeslot is less than the sensitivity of optical receiver, represent that the optical network unit under this EPON mouth is luminous normal, return to the detection of step a to next EPON mouth; Otherwise enter next step;
C), if the optical power value of free timeslot is more than or equal to optical receiver sensitivity, thinks under this EPON mouth and have long hair light optical network unit;
D) the long hair light optical network unit under this EPON mouth positioned and isolated, returning to step a and detect next EPON mouth.
2. method according to claim 1, it is characterized in that, the process of steps d location comprises: record the free timeslot optical power value P1 that current detection arrives, then close one by one the laser of all optical network units under this EPON mouth, often close one and all the free timeslot optical power value P2 of this EPON mouth is carried out to once record, by comparing the size of P1, P2, judge whether long hair light of current optical network unit, when being judged as YES, to the network management system of optical line terminal, carry out alarm.
3. method according to claim 2, is characterized in that, relatively the method for the size of P1, P2 judgement long hair light optical network unit comprises:
D1), if P1=P2 shows that this optical network unit is not long hair light, continue to detect next optical network unit; Otherwise enter next step;
D2) if P1>P2 shows that this optical network unit is long hair light, closes its laser;
D3), if P2 >=optical receiver sensitivity shows also to exist long hair light optical network unit, return to steps d 1 and detect next optical network unit; Otherwise enter next step;
D4) if P2< optical receiver sensitivity shows that the long hair light optical network unit under this EPON mouth all finds, then open the laser of other normal optical network units, system is recovered normal work.
4. according to the method in claim 2 or 3, it is characterized in that: before step a detects, optical network unit is recorded in a table with not online optical network unit online by all, table rolls off the production line on formation optical network unit; Before steps d detects P2, close one by one the optical network unit laser rolling off the production line in table on optical network unit.
5. according to the method described in any one in claim 1～3, it is characterized in that, before step a, also carry out following step:
S1) whether optical line terminal detects this EPON mouth long hair light detection option and enables, and enters if YES next step, otherwise detects next EPON mouth;
Whether the long hair light sense cycle that S2) optical line terminal detects this EPON mouth arrives, and enters if YES step a, otherwise return to step S1, detects next EPON mouth.
6. according to the method described in any one in claim 1～3, it is characterized in that: refer to-23.1dbm of the sensitivity of optical receiver.
7. method according to claim 5, is characterized in that: the long hair light sense cycle of step S2 is 60s.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106936626A (en) * | 2017-01-23 | 2017-07-07 | 深圳市西迪特科技有限公司 | The failure solution and system of rogue ONU in GPON systems |
| CN112188326A (en) * | 2020-09-09 | 2021-01-05 | 中盈优创资讯科技有限公司 | Method and device for checking and remedying rogue ONU |
| CN112866834A (en) * | 2019-11-28 | 2021-05-28 | 中国电信股份有限公司 | Optical network unit and processing method and system for long light-emitting fault thereof |
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| CN106936626A (en) * | 2017-01-23 | 2017-07-07 | 深圳市西迪特科技有限公司 | The failure solution and system of rogue ONU in GPON systems |
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| CN112188326A (en) * | 2020-09-09 | 2021-01-05 | 中盈优创资讯科技有限公司 | Method and device for checking and remedying rogue ONU |
| CN112188326B (en) * | 2020-09-09 | 2023-03-14 | 中盈优创资讯科技有限公司 | Method and device for checking and renovating rogue ONU |
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