CN101820316A - Method for closing constant optical network unit and optical network unit thereof - Google Patents
Method for closing constant optical network unit and optical network unit thereof Download PDFInfo
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- CN101820316A CN101820316A CN200910078925A CN200910078925A CN101820316A CN 101820316 A CN101820316 A CN 101820316A CN 200910078925 A CN200910078925 A CN 200910078925A CN 200910078925 A CN200910078925 A CN 200910078925A CN 101820316 A CN101820316 A CN 101820316A
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Abstract
The invention discloses an optical network unit and a method for closing a constant optical network unit. The method is used for closing an ONU (Optical Network Unit) with a constant optical fault when a downlink channel from an optical line terminal (Optical Line Terminal) to the optical network unit ONU is unavailable, thereby avoiding influencing other normal works of the ONU, wherein the optical network unit comprises an optical module used for outputting optical signals, an optical splitter used for separating a part of optical signals from the optical signals output by the optical module, a detection module used for determining whether the optical module is in a constant optical state or not by detecting the part of optical signals separated by the optical splitter and a control unit used for controlling the optical module to close when the detection module determines that the optical module is in the constant optical state.
Description
Technical field
The present invention relates to the optical communication technique field, especially relate to a kind of method and optical network unit thereof of closing constant optical network unit.
Background technology
EPON (PON, Passive Optical Network) technology is to realize that optical fiber is to object (FTTx, Fiber To The X) mainstream technology, as shown in Figure 1, for typical PON network structure in the prior art, specifically comprise optical line terminal (OLT, Optical Line Terminal) 10, Optical Distribution Network (ODN, Optical Distribution Network) 20 and optical network unit (ONU, OpticalNetwork Unit) 30.Concrete, " passive " promptly is meant and do not comprise any active electronic device and power supply thereof among the ODN 20, all be made up of passive devices such as optical fiber and optical branching devices.
Because the up employing time division multiplexing of ONU (TDM, Time Division Multiplexing) mode shared link, therefore break down when being in the long hair light state as a certain ONU, may cause all ONU that link to each other with the same PON mouth of OLT all can't operate as normal.
At present at Ethernet PON (EPON, Ethernet PON) with gigabit PON (Gbit PON) system in, generally detect the up long hair light signal of ONU by OLT, when OLT has detected the ONU long hair light time, at first adopt certain algorithm to determine to occur the ONU of long hair light fault, send instructions down then this ONU that long hair light fault occurs is closed.
But the ONU that adopts said method to avoid occurring long hair light fault influences the operate as normal of other ONU, need are in still available the descending in advance of the down going channel of OLT to ONU, the OLT ONU that will long hair light fault occur that could descend to send instructions closes, if this moment OLT to ONU down going channel break down cause unavailable, to cause OLT can't close the ONU that long hair light fault occurs, thereby influence the operate as normal of other ONU.
Summary of the invention
The embodiment of the invention provides a kind of method and optical network unit thereof of closing constant optical network unit, even so that when the down going channel of OLT to ONU is unavailable, can avoid influencing the ONU of other operate as normal so that the ONU of long hair light fault occurring closes equally.
For addressing the above problem, the embodiment of the invention provides a kind of optical network unit, comprises optical module, is used to export light signal; Optical branching device is used for from the light signal cutting out partial light signal of optical module output; Detection module is used for determining by the isolated part optical signals of optical branching device is detected whether described optical module is in the long hair light state; Control unit is used for controlling described optical module and closing when detection module is determined described optical module and is in the long hair light state.
The method that a kind of closing constant optical network unit is provided that the embodiment of the invention is also corresponding comprises: optical network unit is the cutting out partial light signal from the light signal of the optical module output of self; By isolated part optical signals is detected, determine whether described optical module is in the long hair light state; And when determining described optical module and be in the long hair light state, control described optical module and close.
Whether the embodiment of the invention is in the long hair light state by the optical module that ONU detects self inside voluntarily, and when detecting optical module and be in the long hair light state, the control optical module is in closed condition, even therefore can reach when the down going channel of OLT to ONU is unavailable, equally can be so that being in the ONU of long hair light fault close, thus avoid influencing the ONU of other operate as normal.
Description of drawings
Below in conjunction with each accompanying drawing the specific implementation process of the embodiment of the invention is carried out detailed elaboration, wherein in each accompanying drawing:
Fig. 1 is a typical PON network structure in the prior art;
Fig. 2 is the concrete composition structured flowchart of the ONU of embodiment of the invention proposition;
Fig. 3 specifically forms structured flowchart for first embodiment of the ONU that the present invention proposes;
Fig. 4 specifically forms structured flowchart for second embodiment of the ONU that the present invention proposes;
Fig. 5 specifically forms structured flowchart for the 3rd embodiment of the ONU that the present invention proposes;
The method process chart of closing long luminance ONU that Fig. 6 proposes for the embodiment of the invention.
Embodiment
The design philosophy of the embodiment of the invention is whether to be in the long hair light state by the optical module that the ONU in the PON system detects the output light signal of self inside voluntarily, when detecting optical module and be in the long hair light state, the positive closing optical module, and need not need detect the up long hair light signal of ONU by the OLT in the PON system as prior art.In the prior art, the long hair light time appears when OLT has detected ONU, at first adopt certain algorithm to determine to occur the ONU of long hair light fault, send instructions down then this ONU that long hair light fault occurs is closed, thereby effectively avoided when the down going channel of OLT to ONU is unavailable, to cause OLT can't close the ONU that long hair light fault occurs, and then also can influence the problem of the operate as normal of other ONU, also can avoid simultaneously because OLT searches the algorithm of the ONU of long hair light fault is producer's proprietary protocol, thereby make the skimble-scamble problem of algorithm of locking fault.
As shown in Figure 2, the concrete composition structured flowchart of the ONU that proposes for the embodiment of the invention comprising optical module 200, is used to export light signal; Optical branching device 202 is used for from light signal cutting out partial (on a small quantity) light signal of optical module 200 outputs; Detection module 204 is used for by optical branching device 202 isolated part (on a small quantity) light signals are detected, to determine whether optical module 200 is in the long hair light state; Control unit 206 is used for when detection module 204 is determined optical module 200 and is in the long hair light state, and control optical module 200 is closed, and promptly controls optical module 200 and stops to export light signal.
As shown in Figure 3, first embodiment of the ONU that proposes for the present invention specifically forms structured flowchart, and the concrete course of work of each part that wherein comprises is as follows:
The output that optical module 300 is used to export light signal is connected with asymmetrical beam splitter 302, and asymmetrical beam splitter 302 is input to detection module 304 with a little light signal of optical module 300 outputs; Detection module 304 detects by a little light signal to 302 inputs of asymmetrical beam splitter, to determine whether optical module 300 is in the long hair light state, when detecting optical module 300 and be in the long hair light state, testing result is notified to control unit (being that example describes with the central processing unit CPU with control unit) 306 here; CPU306 closes with control optical module 300 by the driving voltage of ONU chip 308 control optical modules 300, promptly controls optical module 300 and stops to export light signal, avoids optical module 300 long hair light.
As shown in Figure 4, second embodiment of the ONU that proposes for the present invention specifically forms structured flowchart, and the concrete course of work of each part that wherein comprises is as follows:
The output that optical module 400 is used to export light signal is connected with asymmetrical beam splitter 402, and asymmetrical beam splitter 402 is input to detection module 404 with a little light signal of optical module 400 outputs; Detection module 404 detects by a little light signal to 402 inputs of asymmetrical beam splitter, to determine whether optical module 400 is in the long hair light state, when detecting optical module 400 and be in the long hair light state, testing result is notified to control unit (CPU) 406; CPU 406 closes with control optical module 400 by the bias voltage of biasing circuit 408 control optical modules 400, promptly controls optical module 400 and stops to export light signal, avoids optical module 400 long hair light.
Certainly close for the optical module that will be in the long hair light state that can insure more, the mode of closing optical module that proposes among above-mentioned first embodiment and second embodiment can also be used in combination, be that CPU among the ONU detects optical module at detection module and is in the long hair light time, driving voltage by ONU chip controls optical module, close with the control optical module, the synchronous bias voltage that passes through the bias circuit controls optical module, close with the control optical module, as shown in Figure 5, the 3rd embodiment of the ONU that proposes for the present invention specifically forms structured flowchart.
As shown in Figure 6, be the method process chart of closing long luminance ONU that the embodiment of the invention proposes, wherein the specific implementation process is as follows:
Step 601, cutting out partial (getting final product on a small quantity) light signal in the light signal of the optical module output of ONU from self; Preferably, ONU can adopt cutting out partial in the light signal of the optical module output of asymmetric beam split mode from self;
Step 603, whether ONU is in the long hair light state by above-mentioned isolated part optical signals is detected to determine the optical module in self;
Step 605, ONU, controls the optical module of self and closes when the optical module in determining self is in the long hair light state by after isolated a little light signal is detected processing, promptly controls optical module and stops to export light signal, avoids optical module long hair light.Wherein the concrete driving voltage that can control the optical module in self by the ONU chip in self of ONU is closed with the control optical module, can also close with the control optical module by the bias voltage of the optical module in the bias circuit controls self in self.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these 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 (10)
1. an optical network unit is characterized in that, comprising:
Optical module is used to export light signal;
Optical branching device is used for from the light signal cutting out partial light signal of optical module output;
Detection module is used for determining by the isolated part optical signals of optical branching device is detected whether described optical module is in the long hair light state;
Control unit is used for controlling described optical module and closing when detection module is determined described optical module and is in the long hair light state.
2. optical network unit as claimed in claim 1 is characterized in that, described control unit is controlled described optical module and closed by the driving voltage of the described optical module of optical network unit chip controls.
3. optical network unit as claimed in claim 1 is characterized in that, described control unit is controlled described optical module and closed by the bias voltage of the described optical module of bias circuit controls.
4. optical network unit as claimed in claim 1 is characterized in that, described control unit is by the driving voltage of the described optical module of optical network unit chip controls, and the bias voltage that passes through the described optical module of bias circuit controls, controls described optical module and closes.
5. as claim 1,2,3 or 4 described optical network units, it is characterized in that described optical branching device is the asymmetrical beam splitter.
6. the method for a closing constant optical network unit is characterized in that, comprising:
Optical network unit is the cutting out partial light signal from the light signal of the optical module output of self;
By isolated part optical signals is detected, determine whether described optical module is in the long hair light state; And
When determining described optical module and be in the long hair light state, control described optical module and close.
7. method as claimed in claim 6 is characterized in that, controls described optical module and closes, and specifically comprises:
By the driving voltage of the described optical module of optical network unit chip controls, control described optical module and close.
8. method as claimed in claim 6 is characterized in that, controls described optical module and closes, and specifically comprises:
By the bias voltage of the described optical module of bias circuit controls, control described optical module and close.
9. method as claimed in claim 6 is characterized in that, controls described optical module and closes, and specifically comprises:
By the driving voltage of the described optical module of optical network unit chip controls, and the bias voltage that passes through the described optical module of bias circuit controls, control described optical module and close.
10. as claim 6,7,8 or 9 described methods, it is characterized in that described optical network unit adopts asymmetric beam split mode cutting out partial light signal from the light signal of the optical module output of self.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910078925A CN101820316A (en) | 2009-02-27 | 2009-02-27 | Method for closing constant optical network unit and optical network unit thereof |
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| CN200910078925A CN101820316A (en) | 2009-02-27 | 2009-02-27 | Method for closing constant optical network unit and optical network unit thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916742A (en) * | 2012-11-06 | 2013-02-06 | 烽火通信科技股份有限公司 | Method and device for detecting and closing constant light-emitting optical network unit |
| CN103199921A (en) * | 2013-03-26 | 2013-07-10 | 上海斐讯数据通信技术有限公司 | Ethernet passive optical network (EPON) optical distribution network (ONU) long-luminescence detection circuit |
| CN103209023A (en) * | 2013-04-15 | 2013-07-17 | 浙江工业大学 | Intelligent optical network unit (ONU) optical transceiver module capable of automatically locking and controlling emergency light emitting |
| CN103236890A (en) * | 2013-04-15 | 2013-08-07 | 浙江工业大学 | ONU (optical network unit) intelligent optical transceiver module capable of automatically closing long-emission laser device |
| CN103686468A (en) * | 2012-09-21 | 2014-03-26 | 上海斐讯数据通信技术有限公司 | Client device and control method thereof, and passive optical network and operation method thereof |
| CN107294596A (en) * | 2016-03-30 | 2017-10-24 | 青岛海信宽带多媒体技术有限公司 | Optical signal processing method and optical network unit in optical module |
-
2009
- 2009-02-27 CN CN200910078925A patent/CN101820316A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103686468A (en) * | 2012-09-21 | 2014-03-26 | 上海斐讯数据通信技术有限公司 | Client device and control method thereof, and passive optical network and operation method thereof |
| CN102916742A (en) * | 2012-11-06 | 2013-02-06 | 烽火通信科技股份有限公司 | Method and device for detecting and closing constant light-emitting optical network unit |
| CN102916742B (en) * | 2012-11-06 | 2015-05-13 | 烽火通信科技股份有限公司 | Method and device for detecting and closing constant light-emitting optical network unit |
| CN103199921A (en) * | 2013-03-26 | 2013-07-10 | 上海斐讯数据通信技术有限公司 | Ethernet passive optical network (EPON) optical distribution network (ONU) long-luminescence detection circuit |
| CN103209023A (en) * | 2013-04-15 | 2013-07-17 | 浙江工业大学 | Intelligent optical network unit (ONU) optical transceiver module capable of automatically locking and controlling emergency light emitting |
| CN103236890A (en) * | 2013-04-15 | 2013-08-07 | 浙江工业大学 | ONU (optical network unit) intelligent optical transceiver module capable of automatically closing long-emission laser device |
| CN107294596A (en) * | 2016-03-30 | 2017-10-24 | 青岛海信宽带多媒体技术有限公司 | Optical signal processing method and optical network unit in optical module |
| CN107294596B (en) * | 2016-03-30 | 2019-12-17 | 青岛海信宽带多媒体技术有限公司 | Optical signal processing method in optical module and optical network unit |
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Application publication date: 20100901 |