CN101882958B - APR (Automatic Power Reduction) protection method and device - Google Patents
APR (Automatic Power Reduction) protection method and device Download PDFInfo
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- CN101882958B CN101882958B CN201010183396.XA CN201010183396A CN101882958B CN 101882958 B CN101882958 B CN 101882958B CN 201010183396 A CN201010183396 A CN 201010183396A CN 101882958 B CN101882958 B CN 101882958B
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- power
- line amplifier
- luminous power
- optical line
- signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- 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
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07955—Monitoring or measuring power
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2210/00—Indexing scheme relating to optical transmission systems
- H04B2210/08—Shut-down or eye-safety
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses APR (Automatic Power Reduction) protection method and device. The device comprises an optical coupler used for coupling a part of optical power to another board card of a target site at an input end of one board card of the target site; and the device also comprises the another board card used for detecting whether a part of the optical power is lower than a threshold value or not, and if so, a source site is required to reduce output optical power. According to the technical scheme, the problems of lower reliability and limited speed in a correlation technique adopting a signaling interaction mode to reduce the optical power are solved, and then the reliability and the execution speed of an APR progress are improved.
Description
Technical field
The present invention relates to the communications field, reduce (Automatic Power Reduction, referred to as APR) guard method and device in particular to a kind of luminous power.
Background technology
In light communication system, optical cable cut-out, equipment failure or the optical connector accident such as extract all can cause luminous power to be lost, for the consideration of eye-safe, in the case of luminous power in an optical transmission section of main optical path is lost, need system to provide auto light power to reduce (APR) process, can recover relatively easily for system after reconnecting at link, need to consider to implement automatically (or artificial) simultaneously and restart process.
In the time detecting that the light signal of all main optical paths is all lost, optical wavelength-division multiplex (Wavelength Division Multiplexing, referred to as WDM)/optical transport network (Optical Transport Network, referred to as OTN) system just starts APR process, close all amplifiers in affected optical transmission section (Optical Transport Section, referred to as OTS) section; In the time that signal recovers, can recover again the work of optical line amplifier (LineAmplifier, referred to as LA).Can ensure like this in the situation of closing, the luminous power in optical fiber is within safe class requires.
The APR technology process of optical transmission system must be moved continuously, can not be closed, otherwise danger classes can be too high.
Below in conjunction with describe APR process principle as Fig. 1.When after the fracture of A point optical cable, receiving port R2 place detects optical transmission section signal Loss of continuity (LOC-OTS), and this will cause the power output of T2 transmit port to reduce; Cause equally again the LOC-OTS at receiving port R1 place, thereby transmit port T1 place power output is reduced.So just can ensure that luminous power in the OTS section at the A point place of breaking down is all in lsafety level.
In correlation technique, detect when light signal is lost at R2 place, drop-out is reported to the APR controller in system, APR controller issues the Output optical power at APR instruction minimizing T2 place.Adopt this kind of implementation need to carry out the mutual of signaling, thereby reliability is lower, speed is restricted.
Summary of the invention
Reduce luminous power for the mode that adopts Signalling exchange in correlation technique, reliability is lower, the problem that speed is restricted, and main purpose of the present invention is to provide a kind of APR guard method and device, one of to address the above problem at least.
According to an aspect of the present invention, provide a kind of auto light power to reduce APR protective device.
Reducing APR protective device according to auto light power according to the present invention comprises: optical coupler, for the input of the board at object website by a part of Coupling power another board to object website; Another board, for detection of a part of luminous power, whether lower than threshold value, if so, request source website reduces Output optical power.
According to a further aspect in the invention, provide a kind of auto light power to reduce APR guard method.
Reducing APR guard method according to auto light power of the present invention comprises: the input of the board of object website by a part of Coupling power another board to object website; Whether another board detects a part of luminous power lower than threshold value, and if so, another board request source website reduces Output optical power.
By the present invention, add optical coupler at Transmission Fibers end, a part of Coupling power to another board of described object website is carried out to input, solve and in correlation technique, adopted the mode of Signalling exchange to reduce luminous power, reliability is lower, the problem that speed is restricted, and then can improve the execution speed of reliability and APR process.
Brief description of the drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the APR process schematic diagram according to correlation technique;
Fig. 2 is according to the structural representation of the APR protective device of the embodiment of the present invention;
Fig. 3 is the structural representation of LA inner function module according to the preferred embodiment of the invention;
Fig. 4 is the LA internal structure schematic diagram of the example one according to the present invention;
Fig. 5 is the LA internal structure schematic diagram of the example two according to the present invention;
Fig. 6 is according to the flow chart of the APR guard method of the embodiment of the present invention;
Fig. 7 be according to the present invention example add the structural representation of the APR protective device of 1: 99 optical coupler at Transmission Fibers end;
Fig. 8 be according to the present invention example add the structural representation of the APR protective device of 5: 95 optical couplers at Transmission Fibers end.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.
Fig. 2 is according to the structural representation of the APR protective device of the embodiment of the present invention.As shown in Figure 2, this APR protective device mainly comprises: optical coupler 20 and another board 22 (can be above-mentioned optical line amplifier).
Optical coupler 20, for the input of the board at object website by a part of Coupling power another board to object website;
Another board 22, for detection of a part of luminous power, whether lower than threshold value, if so, request source website reduces Output optical power.
Adopt above-mentioned APR protective device; add optical coupler at Transmission Fibers end; a part of Coupling power to another board of object website is carried out to input, can avoid the Signalling exchange between correlation technique middle controller and LA, improve the execution speed of reliability and APR process.
Preferably, optical coupler 20, also, for adopting predetermined splitting ratio to be divided into two parts the luminous power receiving, is coupled to another board by a part less luminous power in two parts, and a part larger luminous power in two parts is coupled to board.
As shown in Figure 2; on the framework basis shown in Fig. 1, add optical coupler at the Transmission Fibers end that carrys out light according to the APR protective device of the embodiment of the present invention, light signal is divided into 2 tunnels; continue along transmission direction transmission on one tunnel, an other road access B to LA in carry out optical signal detecting.Wherein, in figure, the drawn line of arrow is optical fiber, and the direction of arrow is optical transmission direction.
It should be noted that as shown in Figure 2, also can B always the Transmission Fibers end of light add optical coupler, light signal is divided into 2 tunnels, continue along transmission direction transmission on a road, an other road access A to LA in carry out optical signal detecting.
Another board 22 above-mentioned can be optical line amplifier (LA), in order to realize the present invention, need to improve accordingly LA.The inner function module of this LA is described below in conjunction with Fig. 3.
Fig. 3 is the structural representation of LA inner function module according to the preferred embodiment of the invention.As shown in Figure 3, LA can comprise two functional modules: light detection module 30 and LA control module 32, wherein, the light detection module of LA inside is sent into testing result (phenomenon that whether exists optical power signals to lose) control module of LA inside, in the time detecting that light signal is lost, the power output of LA control module control LA is reduced to firm power.
Below in conjunction with Fig. 4 and Fig. 5, LA inside preferred structure is described.
Preferably, as shown in Figure 4, LA may further include: photoelectric conversion module 40 (for example, photodiode), for converting the optical power signals receiving to the signal of telecommunication, and inputs to analog to digital conversion circuit; Analog to digital conversion circuit 42, for converting the signal of telecommunication receiving to digital signal, and is sent to control unit.Control module 44, for identifying a part of luminous power according to digital signal whether lower than threshold value, and request source website reduces Output optical power.
Wherein, photoelectric conversion module is not limited to photodiode, and photoelectric conversion module can also be other electrooptical devices.
Preferably, as shown in Figure 5, LA may further include: photoelectric conversion module 50, for converting the optical power signals receiving to level signal, and inputs to comparator; Comparator 52, for the level of the level signal receiving and level threshold are compared, determines output high level or low level signal according to comparative result, and exports control unit to; Control module 54, for identifying according to high level or low level signal whether whether a part of luminous power is lower than threshold value, and request source website reduces Output optical power.
Fig. 6 is according to the flow chart of the APR guard method of the embodiment of the present invention.As shown in Figure 6, this APR guard method mainly comprises following processing;
Step S602: at the input of the board of object website by a part of Coupling power to vertical another board accounting for a little of object;
Step S604: whether another board detects a part of luminous power lower than threshold value, if so, another board request source website reduces Output optical power.
Adopt above-mentioned APR guard method, can avoid the Signalling exchange between correlation technique middle controller and LA, improve the execution speed of reliability and APR process.
Preferably, above-mentioned steps S602 may further include following processing:
(1) optical coupler adopts predetermined splitting ratio to be divided into two parts the luminous power receiving;
(2) part less luminous power in two parts is coupled to another board by optical coupler.
In preferred implementation process, a part larger luminous power in two parts is coupled to board by optical coupler.
By above-mentioned processing, can, in carrying out input, not affect the normal transmission of light signal.
Preferably, in step S604, whether another board detects a part of luminous power can comprise following processing lower than threshold value:
(1) photoelectric conversion module converts the optical power signals receiving to the signal of telecommunication, and inputs to analog to digital conversion circuit;
(2) analog to digital conversion circuit converts the signal of telecommunication receiving to digital signal, and is sent to control module;
(3) whether control module identifies a part of luminous power lower than threshold value according to digital signal;
Wherein, above-mentioned photoelectric conversion module, analog to digital conversion circuit and control module are contained in above-mentioned another board.
Preferably, in step S604, whether another board detects a part of luminous power can also comprise following processing lower than threshold value:
(1) photoelectric conversion module converts the optical power signals receiving to level signal, and inputs to comparator;
(2) comparator compares the level of the level signal receiving and level threshold, determines output high level or low level signal, and export control module to according to comparative result;
(3) control module identifies according to high level or low level signal whether whether a part of luminous power is lower than threshold value;
Wherein, above-mentioned photoelectric conversion module, comparator and control module are all contained in another board.
Below in conjunction with Fig. 7 and Fig. 8, above-mentioned preferred implementation process is described.
Fig. 7 be according to the present invention example add the structural representation of the APR protective device of 1: 99 optical coupler at Transmission Fibers end.As shown in Figure 7, coupler adopt 1: 99 luminous power splitting ratio, 1% luminous power enter B to LA in detect.
In preferred implementation process, can adopt the LA shown in Fig. 4 to detect and control.1% luminous power enters LA inside, converts optical power signals to the signal of telecommunication through photodiode, and the signal of telecommunication is sent into analog to digital conversion circuit and converted the digital signal that control module can be identified to.The control module of LA judges whether optical power signals loses (whether inputting the luminous power of LA lower than threshold value), if lost, the input optical power of controlling LA reduces.
In preferred implementation process, also can adopt the LA shown in Fig. 5 to detect and follow-up control.Luminous power enters LA inside, convert optical power signals to the signal of telecommunication through photodiode, the signal of telecommunication is sent into comparator, compare with fixed voltage V (being level threshold), if lower than this voltage, circuit output low level, exports high level higher than V, outputs level signals is sent into LA control module, LA determines whether reduce Output optical power according to low and high level, if be output as high level, maintains former power stage, is output as low level and reduces luminous power output.
Fig. 8 be according to the present invention example add the structural representation of the APR protective device of 5: 95 optical couplers at Transmission Fibers end.As shown in Figure 8, coupler adopt 5: 95 luminous power splitting ratios, 5% luminous power enter B to LA in detect.
In preferred implementation process, can adopt the LA shown in Fig. 4 to detect and control.Also can adopt the LA shown in Fig. 5 to detect and follow-up control.Above concrete Detection & Controling process, mention, repeat no more herein.
In sum, by above-described embodiment provided by the invention, can, realizing under the prerequisite of APR protection object, avoid the Signalling exchange between controller and LA, improve the execution speed of reliability and APR process.And, simple and practical according to the APR protective device of the embodiment of the present invention, be easy to realize.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that multiple calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out shown or described step with the order being different from herein, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
1. auto light power reduces an APR protective device, is applied to wavelength-division system, it is characterized in that, comprising:
Optical coupler, for the input of the optical line amplifier at object website by a part of Coupling power another optical line amplifier to described object website;
Described another optical line amplifier, for detection of described a part of luminous power, whether lower than threshold value, if so, request source website reduces Output optical power;
Wherein, described another optical line amplifier comprises one of following:
Photoelectric conversion module, for converting the optical power signals receiving to the signal of telecommunication, and inputs to analog to digital conversion circuit; Analog-digital conversion circuit as described, for converting the described signal of telecommunication receiving to digital signal, and is sent to control unit; Described control module, for whether identifying described a part of luminous power lower than described threshold value according to described digital signal, and request source website reduces Output optical power;
Photoelectric conversion module, for converting the optical power signals receiving to level signal, and inputs to comparator; Described comparator, for the level of the described level signal receiving and level threshold are compared, determines output high level or low level signal according to comparative result, and exports control unit to; Described control module, for identifying according to described high level or low level signal whether whether described a part of luminous power is lower than described threshold value, and request source website reduces Output optical power.
2. device according to claim 1, is characterized in that,
Described optical coupler, also for adopting predetermined splitting ratio to be divided into two parts the luminous power receiving, the part that in described two parts, luminous power is less is coupled to described another optical line amplifier, the part that in described two parts, luminous power is larger is coupled to described optical line amplifier.
3. device according to claim 1, is characterized in that, described photoelectric conversion module comprises: photodiode.
4. auto light power reduces an APR guard method, is applied to wavelength-division system, it is characterized in that, comprising:
The input of the optical line amplifier of object website by a part of Coupling power another optical line amplifier to described object website;
Whether described another optical line amplifier detects described a part of luminous power lower than threshold value, if, described another optical line amplifier request source website reduces the described luminous power of output, wherein, whether the described a part of luminous power of described another optical line amplifier detection comprises one of following methods lower than threshold value:
Photoelectric conversion module converts the optical power signals receiving to the signal of telecommunication, and inputs to analog to digital conversion circuit; Analog-digital conversion circuit as described converts the described signal of telecommunication receiving to digital signal, and is sent to control module; Whether described control module identifies described a part of luminous power lower than described threshold value according to described digital signal; Wherein, described photoelectric conversion module, analog-digital conversion circuit as described and described control module are contained in described another optical line amplifier;
Photoelectric conversion module converts the optical power signals receiving to level signal, and inputs to comparator; Described comparator compares the level of the described level signal receiving and level threshold, determines output high level or low level signal, and export control module to according to comparative result; Described control module identifies according to described high level or low level signal whether whether described a part of luminous power is lower than described threshold value; Wherein, described photoelectric conversion module, described comparator and described control module are all contained in described another optical line amplifier.
5. method according to claim 4, is characterized in that, described a part of Coupling power to another optical line amplifier of described object website is comprised:
Optical coupler adopts predetermined splitting ratio to be divided into two parts the luminous power receiving;
The part that in described two parts, luminous power is less is coupled to described another optical line amplifier by described optical coupler.
6. method according to claim 5, is characterized in that, also comprises:
The part that in described two parts, luminous power is larger is coupled to described optical line amplifier by described optical coupler.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010183396.XA CN101882958B (en) | 2010-05-12 | 2010-05-12 | APR (Automatic Power Reduction) protection method and device |
| PCT/CN2010/078476 WO2011140792A1 (en) | 2010-05-12 | 2010-11-05 | Method and device for automatic power reduction (apr) protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010183396.XA CN101882958B (en) | 2010-05-12 | 2010-05-12 | APR (Automatic Power Reduction) protection method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101882958A CN101882958A (en) | 2010-11-10 |
| CN101882958B true CN101882958B (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010183396.XA Active CN101882958B (en) | 2010-05-12 | 2010-05-12 | APR (Automatic Power Reduction) protection method and device |
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| CN (1) | CN101882958B (en) |
| WO (1) | WO2011140792A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105320881B (en) * | 2014-06-30 | 2020-03-27 | 中兴通讯股份有限公司 | Optical power reduction protection method and device |
| CN105577283A (en) * | 2014-10-14 | 2016-05-11 | 中兴通讯股份有限公司 | Method and apparatus for realizing automatic power reduction of multi-channel system |
| CN113438015B (en) * | 2020-03-23 | 2022-06-10 | 武汉光迅科技股份有限公司 | APR protection method, device and computer storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6807001B1 (en) * | 2001-04-17 | 2004-10-19 | Sycamore Networks, Inc. | Auto shutdown for distributed raman amplifiers on optical communication systems |
| CN1816977A (en) * | 2003-07-25 | 2006-08-09 | 诺基亚公司 | Single-fiber protection in telecommunications networks |
| CN101238618A (en) * | 2005-03-04 | 2008-08-06 | Jds尤尼弗思公司 | Fiber break detection in the presence of raman amplification |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6359708B1 (en) * | 1997-09-18 | 2002-03-19 | Lucent Technologies Inc. | Optical transmission line automatic power reduction system |
| CN100335923C (en) * | 2005-06-07 | 2007-09-05 | 烽火通信科技股份有限公司 | Line protector for four-fiber bidirectional optical amplification section of WDM optical transmission system |
| CN1852052B (en) * | 2005-12-09 | 2010-04-14 | 华为技术有限公司 | Optical-fiber line fault down stream alarm inhibiting method, apparatus and system |
| CN101141218B (en) * | 2007-04-18 | 2013-01-16 | 中兴通讯股份有限公司 | Protection switching system and method for wavelength division multiplexing load client network |
-
2010
- 2010-05-12 CN CN201010183396.XA patent/CN101882958B/en active Active
- 2010-11-05 WO PCT/CN2010/078476 patent/WO2011140792A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6807001B1 (en) * | 2001-04-17 | 2004-10-19 | Sycamore Networks, Inc. | Auto shutdown for distributed raman amplifiers on optical communication systems |
| CN1816977A (en) * | 2003-07-25 | 2006-08-09 | 诺基亚公司 | Single-fiber protection in telecommunications networks |
| CN101238618A (en) * | 2005-03-04 | 2008-08-06 | Jds尤尼弗思公司 | Fiber break detection in the presence of raman amplification |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011140792A1 (en) | 2011-11-17 |
| CN101882958A (en) | 2010-11-10 |
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