CN105792033A - Method for accurately regulating and controlling business optical signal power of PON network - Google Patents
Method for accurately regulating and controlling business optical signal power of PON network Download PDFInfo
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- CN105792033A CN105792033A CN201610250476.XA CN201610250476A CN105792033A CN 105792033 A CN105792033 A CN 105792033A CN 201610250476 A CN201610250476 A CN 201610250476A CN 105792033 A CN105792033 A CN 105792033A
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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
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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
- 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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Abstract
The invention belongs to the field of operation quality assessment and monitor configuration of PON optical network and specifically relates to a method for accurately regulating and controlling business optical signal power of a PON network. During an operation process of the optical network, an optical network device accurately calculates transmit-receive light power values of related business wavelength of each optical node in optical network topology for a certain moment, the transmit-receive light power values of related business wavelength of each optical node at the very moment are gathered through optical network business, the received optimal power of the related business wavelength of any optical node is subtracted by the measured receive light power value of the related business wavelength at the moment, the obtained difference is a regulation and control value of the emission power of related business wavelength of the optical node optical network equipment corresponding to the optical node in the optical network topology, and related equipment is accurately regulated and controlled. The method realizes on-line accurate regulation and control of various business optical signal power of an optical network, ensures optimal work state of the network, and greatly improves the operation and management quality of the optical network.
Description
Technical field
The invention belongs to the assessment of PON optical-fiber network running quality and monitoring field of configuration, be specifically related to a kind of accuracy controlling method of PON business optical signal power.
Background technology
PON (EPON) access network technology is the best solution of the FTTx generally acknowledged in the industry, also it is the main access means of fiber entering household, optical-fiber network scale and terminal quantity are huge, this technology can make multiple user share simple optical fiber, so that optical distribution network (ODN) need not use any active device, namely need not being changed by " optical electrical/light ", this point-to-multipoint framework greatly reduces network installation, administers and maintains cost.
In PON system (GPON, EPON etc.), upward signal adopts 1310nm wavelength, and downstream signal adopts 1490nm and 1550nm wavelength, respectively in the opposite direction along same fiber-optic transfer.1310nm upward signal is kept silent, until by 1490nm downstream signal repeating query and distribute a transmission window, upward signal uses time division multiple acess to access (TDMA) mode and the uplink information of multiple optical network units (ONU) is organized into time division multiplex (TDM) information flow to optical line terminal (OLT).
PON system has powerful OAM ability.
OAM--OperationAdministrationandMaintenance.According to being actually needed of carrier network operation, it is generally 3 big classes by the management workload partition of network: operation (Operation), management (Administration), safeguard (Maintenance), is called for short OAM.Prediction, planning and the configuration work that operation mainly completes commodity network and business carries out；Safeguard the regular job the activity mainly test of network and business thereof and fault management etc. carried out.
PON business optical signal power is the basic guarantee of network data service transmission quality, is an important monitoring and the planning and configuration index of OAM.The too low meeting of business optical signal power makes network data service transmission quality deterioration (under bit error rate increase, peak transfer rate degradation)；The too high meeting of business optical signal power causes terminal works abnormal, affects the service life of optical device.
The transmitting of PON equipment, received optical power scope are generally:
OLT launches luminous power :+2～+6dBm (1490nm)；
Received optical power :-6～-26dBm (1310nm).
ONU launches luminous power :+4～-1dBm (1310nm)；
Received optical power :-8～-26dBm (1490nm).
Want accuracy controlling PON business optical signal power, first, it is necessary to the corresponding service wavelength of energy accuracy controlling optical network device launches luminous power；The second, must be able to the corresponding node service wavelength received optical power of the precise measuring network equipment；3rd, there is the foundation that in accurate measurement optical-fiber network topology, the optical link loss data of each optical node correspondence service wavelength are investigated as regulation and control and fault type.
Current OAM can the transmitting of on-line monitoring optical-fiber network operational outfit light, received optical power, but, PON equipment (OLT, ONU) enormous amount, accurate calibration is consuming time greatly to these equipment separate units, cost is too high, these light net equipment can only be rough calibration at present, and error is at ± about 3dB.This makes the transmitting of the light device monitored of OAM, received optical power only as the reference regulating and controlling PON business optical signal power, it is impossible to as a standard and judgment.
PON equipment is the service terminal equipment (OLT, ONU) accessing PON optical-fiber network, and network size is huge, and during optical-fiber network topology is each, the link load of each optical node varies, and accesses the PON equipment performance run also variant.
At present, under the premise not stopping PON optical network service, accurately configuration regulation and control PON business optical signal power, Logistics networks is in optimum duty all the time and is always up an industry difficult problem.
Summary of the invention
For solving above-mentioned technical problem, it is an object of the invention to: a kind of accuracy controlling method of PON business optical signal power is provided, under the premise not increasing cost, realize the optical-fiber network online accuracy controlling of miscellaneous service optical signal power, Logistics networks is in optimum duty all the time, the running quality of significant increase optical-fiber network and management quality.
The present invention solves that the technical scheme that its technical problem adopts is:
The accuracy controlling method of described PON business optical signal power, comprises the following steps:
The first step, in PON running, carrys out transmitting and the received optical power value of each optical node related service wavelength in accurate measurement a certain moment optical-fiber network topology with PON equipment；
Second step, is pooled together by the optical network service transmitting by each for this moment optical node related service wavelength and received optical power value；
3rd step, the receiving of the related service wavelength of arbitrary optical node optimizes power and deducts the received optical power value of this moment related service wavelength measurement of aforementioned optical node, the control value of the related service wavelength transmitting power that gained difference is in optical-fiber network topology optical node optical network device corresponding to this articulare；
4th, according to the control value that the 3rd step is calculated, PON equipment is performed regulation and control.
The transmitting of each optical node related service wavelength and received optical power in above-mentioned optical-fiber network topology, namely in optical-fiber network running, transmitting that in optical-fiber network topology, the related service wavelength of the light business device that each light joint accesses is actual and received optical power；Described related service wavelength, i.e. downlink business wavelength and uplink service wavelength in PON；Downlink business wavelength generally takes 1490nm and 1550nm, uplink service wavelength generally takes 1310nm, descending smooth business device (OLT) and corresponding up smooth business device (ONU), will there is sufficiently strong business light receiving power signal, optical network data service transmission quality could be ensured；The uplink service light receiving power that descending smooth business device (OLT) is corresponding, is ensured by the uplink service light emitting power of corresponding up smooth business device (ONU)；The downlink business light receiving power that up smooth business device (ONU) is corresponding, is ensured by the downlink business light emitting power of corresponding descending smooth business device (OLT).
Above-mentioned optimization power, namely PON equipment run best effort business optical signal power value or best effort business optical signal power scope, PON equipment guarantee network data service transmission quality optimal light signal power value, in actual applications, generally setting with PON equipment practical business performance parameter, such as, OLT, ONU related service light receiving power is typically in about-18dBm just can ensure good service transmission quality, namely-18dBm can optimize power as the reception of relative photo business device, ensureing under this business light receiving power premise that business light emitting power corresponding thereto is the smaller the better；OLT, ONU optimize transmitting power, and OLT is typically in about 3.5dBm, ONU and is typically in about 3.5dBm, and namely ensureing to run optical-fiber network PON equipment optical device will not the transmitting power of Aging Damage rapidly.Optimizing power is the goal of regulation and control of PON business optical signal power, optimizes power including receiving and sends out transmitting power excellent；This programme, with Logistics networks data traffic transmission quality for regulation and control purpose, in case of other regulate and control purpose, will have different specific embodiments.
Under ensureing optical network data service transmission quality premise, launch optical signal power by the business optimizing to regulate and control premised on power corresponding relevant PON equipment that receives ensureing relevant PON equipment；Optimizing transmitting power is operation evaluation and test foundation PON equipment practical business being launched to optical signal power.
Wherein, it is preferable that scheme is:
Step is specifically regulated and controled for downlink business light as follows:
The first step, in PON running, accurate measurement a certain moment OLT downlink business light emitting power value, the corresponding downlink business light receiving power value that under OLT, each optical node ONU will now record simultaneously；
Second step, is pooled together the descending light receiving power value that OLT downlink business light emitting power value and each optical node ONU record by PON network service；
3rd step, the reception of ONU optimizes power, deducts minima in the descending light receiving power value recorded of each optical node ONU under OLT, and gained difference is the control value of OLT downlink business optical signal launch power；
4th step, performs regulation and control according to the control value that the 3rd step is calculated to OLT downlink business optical signal launch power, and downlink business light optical signal power has regulated and controled.
Above-mentioned steps preserves regulation and control running log while carrying out, as the foundation of optical-fiber network running quality, business regulation and control and fault type investigation.
Considering the particularity of PON optical-fiber network topological structure, descending smooth business device (OLT) corresponding to multiple up smooth business devices (ONU), namely simultaneously corresponding to be received for one more；The downlink business light receiving power that up smooth business device (ONU) is corresponding, is ensured by the downlink business light emitting power of corresponding descending smooth business device (OLT)；So downlink optical signal power regulation, ensure the downlink business light receiving power that all up smooth business device (ONU) corresponding with descending smooth business device (OLT) has had, so, select minimum descending light receiving power to calculate the control value of OLT downlink business optical signal launch power；The business received for a correspondence one then need not choose minima.
Step is specifically regulated and controled for uplink service light as follows:
The first step, in PON running, accurate measurement a certain moment ONU uplink service light emitting power value, OLT is in ONU uplink service frame time gap simultaneously, measures the uplink service light receiving power value of corresponding ONU；
Second step, measures up light receiving power value by ONU uplink service light emitting power value and OLT by PON network service in each ONU uplink service frame time gap and pools together；
3rd step, the reception optimization power of OLT deducts OLT and measures up light receiving power value in each ONU uplink service frame time gap, and gained difference is the control value of each ONU uplink service optical signal launch power；
4th step, ONU performs the control value that the 3rd step is calculated, and uplink optical signal power regulation completes.
Above-mentioned steps preserves regulation and control running log while carrying out, as the foundation of optical-fiber network running quality, business regulation and control and fault type investigation.
For ensureing regulation and control accuracy, before carrying out the first step, first pass through transmission and the received optical power of PON equipment bidirectional transmit-receive luminous power self-checking device calibration PON equipment.
Described PON equipment bidirectional transmit-receive luminous power self-checking device, including at least a set of two-way automatic alignment unit and centralized control unit, described two-way automatic alignment unit is connected with centralized control unit, light adjustment module that two-way automatic alignment unit includes being sequentially connected with, can real-time online output light sampling module and can real-time online input light sampling module, can be connected with optical alignment interface by real-time online input light sampling module.
In the present invention, optical alignment interface is used for connecting outside PON equipment to be calibrated, can exporting light sampling module and can realize synchronizing real-time monitoring to the output of optical alignment interface same light source, input optical power by real-time online input light sampling module by real-time online of two-way automatic alignment unit, when device uses, need first to carry out self calibration, after self calibration completes, then batch carries out PON equipment transmitting-receiving optical power calibration.
This programme introduces and can export light sampling module and can input light sampling module by real-time online by real-time online, realize the point-to-point two-way real time calibration of same light source, reduce external influence factors, optical alignment interface fiber, incident optical power are measured accurately, are stablized, and greatly improve PON net equipment bidirectional transmit-receive optical power calibration degree of accuracy.Can realizing at synchronization, simultaneously the synchronous calibration to PON equipment bidirectional transmit-receive luminous power to be calibrated, PON equipment to be calibrated input, Output optical power can be calibrated simultaneously, non-interference, greatly improve calibration efficiency；Only optical alignment interface need to be connected outside PON equipment light business interface to be calibrated once, PON equipment multi-wavelength to be calibrated, many power points can be completed, the automatic calibration of bidirectional transmit-receive luminous power.
Described PON equipment bidirectional transmit-receive luminous power self-checking device can calibrate PON equipment bidirectional transmit-receive luminous power efficiently, accurately, making optical network device (OLT, ONU) is not only service operation equipment, is also the measuring equipment of transmitting, received optical power simultaneously.
Under centralized control unit programme-control, adjust each module and PON equipment to be calibrated, realize PON equipment multi-wavelength, many power points, automatically the calibration of bidirectional transmit-receive luminous power and inspection automatically, and automatic discrimination assay, and manage log archive, automatic information statistical analysis, promote quality management and quality control ability.
The accurate calibration of optical network device bidirectional transmit-receive luminous power, makes optical-fiber network optical node can adjust accurately to the transmitting power of optical node, better meets optical-fiber network and runs.
The transmitting of optical-fiber network operational outfit light, reception power are important monitor control indexs of OAM, these light net equipment can only be rough calibration at present, error is big, and this makes the transmitting of the light device monitored of OAM, received optical power only as the reference passing judgment on fiber optic network link-quality.Present invention achieves PON equipment bidirectional transmit-receive luminous power accurate calibration, the PON equipment run also becomes optical metrology device simultaneously, make the transmitting of the light device monitored of OAM, received optical power can become the standard and judgment passing judgment on fiber optic network link-quality, thus fiber optic network on-line quality evaluation and monitoring are produced positive profound significance.
Described can real-time online output light sampling module include optical branching device I, built in light energy meter I, optical branching device I input connects light adjustment module, optical branching device I outfan one tunnel connects and can input light sampling module by real-time online, the other end of optical branching device I output connects built in light energy meter I, built in light energy meter I connects centralized control unit, can monitor the Output optical power of optical alignment interface in real time；Optical branching device II, built in light energy meter II can be included by real-time online input light sampling module, optical branching device II outfan one tunnel connects and can export light sampling module by real-time online, the other end of optical branching device II output connects built in light energy meter II, optical branching device II input connects optical alignment interface, built in light energy meter II connects centralized control unit, can monitor optical alignment interface input optical power in real time；Can real-time online output light sampling module with can the position in two-way automatic alignment unit, the position of real-time online input light sampling module can exchange, namely light adjustment module, can real-time online input light sampling module and can being sequentially connected with by real-time online output light sampling module.
The calibration transmitting of optical network device of described PON equipment bidirectional transmit-receive luminous power self-checking device and received optical power method be:
The first step, PON equipment bidirectional transmit-receive luminous power self-checking device carries out self calibration；
Second step, outside PON equipment to be calibrated connects PON equipment bidirectional transmit-receive luminous power self-checking device, and the transmitting-receiving luminous power of PON equipment to be calibrated is calibrated.
Described first step self calibration includes input optical channel self calibration and output optical channel self calibration, wherein, output optical channel self-calibration process is: external perimysium reference light power meter connects optical alignment interface, and with centralized control unit communication, centralized control unit adjusts the light source mode of light adjustment module under program, wavelength, optical output power, Output optical power is made to reach predefined parameter, external perimysium reference light power meter and built in light energy meter I measure Output optical power simultaneously, centralized control unit reads the numerical value of external perimysium reference light power meter, and this numerical value is passed to built in light energy meter I, with external perimysium reference luminous power for mete-wand, built-in luminous power I meter is calibrated；
Input optical channel self-calibration process is: the optical alignment interface overlapping two-way automatic alignment unit by two connects, two overlap two-way automatic alignment units all with centralized control unit communication, two overlap two-way automatic alignment unit respectively with the built in light power I of the other side for mete-wand, and oneself built in light energy meter II is calibrated；
Input optical channel self calibration terminates rear device self calibration and terminates.
In output optical channel self-calibration process, centralized control unit adjusts the light source mode of light adjustment module, wavelength, optical output power under program, make Output optical power reach predefined parameter, external perimysium reference light power meter and built in light energy meter I measure the Output optical power of light adjustment module simultaneously.
The two two-way automatic alignment units of set that input optical channel self calibration uses are called two-way automatic alignment unit A and two-way automatic alignment unit B, and input optical channel self calibration idiographic flow is:
Centralized control unit under program, adjusts the light source mode of two-way automatic alignment unit A, wavelength, optical output power, makes Output optical power reach predefined parameter；Centralized control unit reads two-way automatic alignment unit A built in light energy meter I numerical value, and this numerical value is passed to two-way automatic alignment unit B built in light energy meter II, with two-way automatic alignment unit A built in light power I for mete-wand, two-way automatic alignment unit B built in light energy meter II is calibrated；In like manner, centralized control unit is under program, adjust the light source mode of two-way automatic alignment unit B, wavelength, optical output power, Output optical power is made to reach predefined parameter, centralized control unit reads two-way automatic alignment unit B built in light energy meter I numerical value, and this numerical value is passed to two-way automatic alignment unit A built in light energy meter II, with two-way automatic alignment unit B built in light power I for mete-wand, two-way automatic alignment unit A built in light energy meter II is calibrated.
Device self calibration makes built in light energy meter I and built in light energy meter II become calibration standard source.Built in light energy meter I can measure or reflect the optical power value that optical alignment interface sends accurately；Built in light energy meter II can measure or reflect the optical power value of optical alignment interface accurately, and batch carries out PON equipment transmitting-receiving optical power calibration on this basis, specific as follows:
A.PON network equipment received optical power is calibrated: outside PON equipment to be calibrated connects optical alignment interface, and with centralized control unit communication, centralized control unit adjusts the light source mode of light adjustment module, wavelength, optical output power under program, Output optical power is made to reach predefined parameter, centralized control unit reads the numerical value of built in light energy meter I, and this numerical value is passed to outside PON equipment to be calibrated, outside PON equipment received optical power to be calibrated is calibrated；Thus realize under different business wavelength, different capacity point is automatically adjusted, automatically calibration PON equipment received optical power.
The B.PON network equipment launches optical power calibration: outside PON equipment to be calibrated connects optical alignment interface, and with centralized control unit communication, centralized control unit adjusts PON equipment to be calibrated under program for launching luminous power state, and adjust transmitting power size in each service wavelength of PON equipment to be calibrated and its business adjusting power control interval, built in light energy meter II monitors the transmitting luminous power of PON equipment to be calibrated in real time, centralized control unit reads the numerical value of built in light energy meter II, and this numerical value is passed to outside PON equipment to be calibrated, outside PON equipment to be calibrated is launched luminous power be calibrated；Thus realize under different business wavelength, different capacity point is automatically adjusted, automatically calibration PON equipment launches luminous power.
Said method will realize each functional module combination of calibration, and be integrated and connected；And application can export light sampling module and can realize same light source real-time sampling is calibrated by real-time online input light sampling module by real-time online in a calibration process；Under centralized control unit control, multiple light courcess, multi-wavelength, many power points bidirectional transmit-receive luminous power are calibrated automatically；Once connect and just can calibrate in batches, need not change.
Centralized control unit has communication function, it may be achieved under outside or remote computer program control or under interactive instruction control, calibrating installation is operated.
Described can real-time online output light sampling module and can real-time online input light sampling module also can share bi-directional light shunt, bi-directional light splitter output is respectively connecting to built in light energy meter I and built in light energy meter II, bi-directional light shunt one road input is connected to optical alignment interface, another road input is connected to light adjustment module, built in light energy meter I and built in light energy meter II connect centralized control unit respectively, and this scheme and aforementioned schemes are distinctive in that online output light sampling module and online input light sampling module have shared bi-directional light shunt.
Described smooth adjustment module includes the multi-wavelength stable light source being sequentially connected with, wavelength switching control module and optical attenuator, multi-wavelength stable light source, wavelength switching control module is connected with control unit respectively with optical attenuator, multi-wavelength stable light source provides the light of the required wavelength of calibration, wavelength switching control module controls incision at centralized control unit and changes the light of respective wavelength to corresponding port, optical attenuator carries out light intensity decays adjustment under the control of centralized control unit, optical attenuator is the optical attenuator that can be automatically adjusted gain, under the control instruction of centralized control unit, automatically gain transformations is carried out, and then regulate the power level of its output optical signal, thus realizing under different light sources, under different wave length, different capacity point is automatically adjusted.
Described multi-wavelength stable light source includes the output of single mode light source or multimode light sources output or both have concurrently, and corresponding respectively with it, described two-way automatic alignment unit is the two-way automatic alignment unit being suitable for single mode；Or for being suitable for the automatic alignment unit of two-way multimode of multimode；Or both have concurrently.
The structure composition of two-way automatic alignment unit is applicable to the automatic alignment unit of bidirection single-mode, the automatic alignment unit of two-way multimode；That is, its basic structure is consistent, and the difference according to single mode light source, multimode light sources, relevant interface etc. does accommodation.
In order to improve the performance motility of device further, described wavelength switching control module also sets up external light source access port.
Described smooth adjustment module, can real-time online output light sampling module and can the real-time online input integrated package that is integrated of light sampling module or for each independent parts, multi-wavelength stable light source in other words, wavelength switching control module, optical attenuator, can real-time online output light sampling module and can the real-time online input integrated package that is integrated of light sampling module or for each independent parts.
Described centralized control unit adopts microcontroller component or stand-alone computer, can with multi-wavelength stable light source, wavelength switching control module, optical attenuator, can real-time online input light sampling module and can the real-time online output integrated package that is integrated of light sampling module or for each independent parts, if each assembly of device, the integrated package that unit is packaged as a whole, because of the simple of structure, reliability is improved, space and cost are also greatly decreased, if each assembly of device, unit is made up of autonomous device respectively, during use, the mode described in literary composition is attached, the motility of system strengthens.
The built-in communication part of described centralized control unit or connection external communication assembly, with PON equipment to be calibrated, external smart compunication, centralized control unit pass through communication part, be connected with external smart computer, and carry out data exchange and communicate；Form of communication is wired or wireless, serial ports or network interface, so realize remotely, controlled in wireless；For easy to operate, can setting up Input/Output Device interface for equipment, input equipment interface connects input equipment, such as keyboard；Outut device interface connects outut device, for instance display screen, is typically the LCD touch screen of integrated input, output function.
If no special instructions, the optical device described in literary composition is suitable for single mode, multimode two ways.Device used in literary composition also according to custom, can be called instrument, platform, system, and built in light energy meter described in literary composition is for external perimysium reference light power meter, its position is not made particular determination, as long as realizing its function.
Compared with prior art, the method have the advantages that
The present invention is under the premise not increasing cost, it is achieved the online accuracy controlling of optical-fiber network miscellaneous service optical signal power, and Logistics networks is in optimum duty all the time, has filled up industry blank.
The PON equipment of all operations in light net is according to the actual light network condition in residing network topology, self adaptation rational allocation each operational factor, can automatically, difference, precisely, fixed point regulation and control PON business optical signal power, Optimization Support network is constantly in optimum duty, ensure network data service transmission quality, promote the data service service quality of operator.
Optimum Regulation PON business optical signal power, extends the service life of PON equipment.
According to preserving business optical signal power regulation and control running log and optical link loss running log, optical-fiber network can be run regulation and control situation and carry out time shaft analysis, and as the foundation of the abnormal early warning of the network operation and accident analysis, thus malfunctioning node and potential faults can be investigated rapidly, reduce the workload of operation maintenance personnel, improve O&M service quality.
The scientific management means of the operation of significant increase optical-fiber network and management level.
In sum, the running quality of significant increase optical-fiber network and management quality.
Technical solution of the present invention will affect whole optical-fiber network running technology progress, industry standard progress and industry and send out a trend, be the new development trend of optical network device and network operation technology.
PON business optical signal power is accurately be calibrated to premise with the High Precision Automatic of PON equipment bidirectional transmit-receive luminous power, the optical alignment interface of PON equipment bidirectional transmit-receive luminous power self-checking device directly enters PON equipment light business interface, achieve PON equipment light business interface point-to-point bi-directional synchronization real time calibration truly, whole optical network device technological progress will be affected, industry standard progress and industry development trend, make optical-fiber network operational outfit be become " service operation equipment+optical metrology device " by single " service operation equipment " to become a reality, it is the new development trend of optical network device and network operation technology.
Accompanying drawing explanation
Fig. 1 is PON optical-fiber network topology and up-downgoing business schematic diagram.
Fig. 2 is PON equipment bidirectional transmit-receive luminous power self-checking device theory diagram described in embodiment 1.
Fig. 3 is a kind of flow process signal of downlink optical signal power regulation of the present invention (for 1490nm).
A kind of flow process that Fig. 4 is uplink optical signal power regulation of the present invention (for 1310nm) is illustrated.
Detailed description of the invention
Below in conjunction with accompanying drawing, the embodiment of the present invention is described further:
Embodiment 1:
The present invention, under ensureing optical network data service transmission quality premise, launches optical signal power by the business optimizing to regulate and control premised on power corresponding relevant PON equipment that receives ensureing relevant PON equipment；Launching optimization power is operation evaluation and test foundation PON equipment practical business being launched to optical signal power.
In Fig. 1, what 1a represented descending light and flow of information collects signal, and what 1b represented up light and flow of information collects signal, descending light shown in 1a in Fig. 1, and the accuracy controlling method of PON business optical signal power of the present invention comprises the following steps:
The first step, in PON running, accurate measurement a certain moment OLT downlink business light emitting power value, the corresponding downlink business light receiving power value that under OLT, each optical node ONU will now record simultaneously；
Second step, is pooled together the descending light receiving power value that OLT downlink business light emitting power value and each optical node ONU record by PON network service；
3rd step, the reception of ONU optimizes power, deducts the value of minimum in the descending light receiving power value recorded of each optical node ONU under OLT one, and gained difference is the control value of OLT downlink business optical signal launch power；
4th step, performs regulation and control according to the control value that the 3rd step is calculated to OLT downlink business optical signal launch power, and downlink business light optical signal power has regulated and controled.
Considering the particularity of PON optical-fiber network topological structure, descending smooth business device (OLT) corresponding to multiple up smooth business devices (ONU), namely simultaneously corresponding to be received for one more；The downlink business light receiving power that up smooth business device (ONU) is corresponding, is ensured by the downlink business light emitting power of corresponding descending smooth business device (OLT)；So downlink optical signal power regulation, ensure the downlink business light receiving power that all up smooth business device (ONU) corresponding with descending smooth business device (OLT) has had, so, select minimum descending light receiving power to calculate the control value of OLT downlink business optical signal launch power；The business received for a correspondence one then need not choose minima.
In above-mentioned second step, PON network service collects descending light receiving power value binding mode OLT downlink business light emitting power value and each optical node ONU recorded multiple way of realization, such as, the respectively data processing equipment of the embedded software of OLT or ONU or peripheral hardware, required numerical value is collected to data processing equipment process, or directly tidal data recovering to optical-fiber network is run the data processing platform (DPP) of system, such as OAM system, then pass through the OAM system data to collecting to process, obtain the control value of light OLT downlink business optical signal launch power, as shown in Figure 3, concretely comprise the following steps:
One, ONU is issued time synchronized instruction by OLT by OAM system；Under OLT, each ONU replys and synchronizes successfully；
Two, ONU is issued descending measuring light power instruction, simultaneously record OLT descending optical power value now by OLT by OAM system, and the descending light receiving power value that each optical node ONU now records is pooled to OLT and OAM system by respective uplink service frame；
Three, receiving of OAM system-computed ONU optimizes performance number and the difference of minima in each optical node ONU descending light receiving power value recorded, and gained difference is the control value of OLT downlink business optical signal launch power；
Four, OAM system issues control value and the regulation and control instruction of downlink business optical signal launch power to OLT, and OLT completes associated regulatory, and downlink business optical signal power has regulated and controled.
Above-mentioned steps preserves regulation and control running log while carrying out, as the foundation of optical-fiber network running quality, business regulation and control and fault type investigation.
In the 3rd step running, OAM can calculate the difference of OLT descending optical power value now and each optical node ONU descending light receiving power value recorded simultaneously, gained difference is the link load of each optical node of optical-fiber network, and preserves running log, as the foundation that optical-fiber network running quality and business regulate and control.
For ensureing regulation and control accuracy, before carrying out the first step, first pass through transmission and the received optical power of PON equipment bidirectional transmit-receive luminous power self-checking device calibration PON equipment.
As shown in Figure 2, described PON equipment bidirectional transmit-receive luminous power self-checking device, PON equipment bidirectional transmit-receive luminous power self-checking device, including at least a set of two-way automatic alignment unit and centralized control unit, described two-way automatic alignment unit is connected with centralized control unit, light adjustment module that two-way automatic alignment unit includes being sequentially connected with, can real-time online output light sampling module and can real-time online input light sampling module, can be connected with optical alignment interface by real-time online input light sampling module.
In the present invention, optical alignment interface is used for connecting outside PON equipment to be calibrated, can exporting light sampling module and can realize synchronizing real-time monitoring to the output of optical alignment interface same light source, input optical power by real-time online input light sampling module by real-time online of two-way automatic alignment unit, when device uses, need first to carry out self calibration, after self calibration completes, then batch carries out PON equipment transmitting-receiving optical power calibration.
This programme introduces and can export light sampling module and can input light sampling module by real-time online by real-time online, realize the point-to-point two-way real time calibration of same light source, reduce external influence factors, optical alignment interface fiber, incident optical power are measured accurately, are stablized, and greatly improve PON net equipment bidirectional transmit-receive optical power calibration degree of accuracy.Can realizing at synchronization, simultaneously the synchronous calibration to PON equipment bidirectional transmit-receive luminous power to be calibrated, PON equipment to be calibrated input, Output optical power can be calibrated simultaneously, non-interference, greatly improve calibration efficiency；Only optical alignment interface need to be connected outside PON equipment light business interface to be calibrated once, PON equipment multi-wavelength to be calibrated, many power points can be completed, the automatic calibration of bidirectional transmit-receive luminous power.
Described PON equipment bidirectional transmit-receive luminous power self-checking device can calibrate PON equipment bidirectional transmit-receive luminous power efficiently, accurately, making optical network device (OLT, ONU) is not only service operation equipment, is also the measuring equipment of transmitting, received optical power simultaneously.
Under centralized control unit programme-control, adjust each module and PON equipment to be calibrated, realize PON equipment multi-wavelength, many power points, automatically the calibration of bidirectional transmit-receive luminous power and inspection automatically, and automatic discrimination assay, and manage log archive, automatic information statistical analysis, promote quality management and quality control ability.
The accurate calibration of optical network device bidirectional transmit-receive luminous power, makes optical-fiber network optical node can adjust accurately to the transmitting power of optical node, better meets optical-fiber network and runs.
The transmitting of optical-fiber network operational outfit light, reception power are important monitor control indexs of OAM, these light net equipment can only be rough calibration at present, error is big, and this makes the transmitting of the light device monitored of OAM, received optical power only as the reference passing judgment on fiber optic network link-quality.Present invention achieves PON equipment bidirectional transmit-receive luminous power accurate calibration, the PON equipment run also becomes optical metrology device simultaneously, make the transmitting of the light device monitored of OAM, received optical power can become the standard and judgment passing judgment on fiber optic network link-quality, thus fiber optic network on-line quality evaluation and monitoring are produced positive profound significance.
Described can real-time online output light sampling module include optical branching device I, built in light energy meter I, optical branching device I input connects light adjustment module, optical branching device I outfan one tunnel connects and can input light sampling module by real-time online, the other end of optical branching device I output connects built in light energy meter I, built in light energy meter I connects centralized control unit, can monitor the Output optical power of optical alignment interface in real time；Optical branching device II, built in light energy meter II can be included by real-time online input light sampling module, optical branching device II outfan one tunnel connects and can export light sampling module by real-time online, the other end of optical branching device II output connects built in light energy meter II, optical branching device II input connects optical alignment interface, built in light energy meter II connects centralized control unit, can monitor optical alignment interface input optical power in real time；Can real-time online output light sampling module with can the position in two-way automatic alignment unit, the position of real-time online input light sampling module can exchange, namely light adjustment module, can real-time online input light sampling module and can being sequentially connected with by real-time online output light sampling module.
The calibration transmitting of optical network device of described PON equipment bidirectional transmit-receive luminous power self-checking device and received optical power method be:
The first step, PON equipment bidirectional transmit-receive luminous power self-checking device carries out self calibration；
Second step, outside PON equipment to be calibrated connects PON equipment bidirectional transmit-receive luminous power self-checking device, and the transmitting-receiving luminous power of PON equipment to be calibrated is calibrated.
Described first step self calibration includes input optical channel self calibration and output optical channel self calibration, wherein, output optical channel self-calibration process is: external perimysium reference light power meter connects optical alignment interface, and with centralized control unit communication, centralized control unit adjusts the light source mode of light adjustment module under program, wavelength, optical output power, Output optical power is made to reach predefined parameter, external perimysium reference light power meter and built in light energy meter I measure Output optical power simultaneously, centralized control unit reads the numerical value of external perimysium reference light power meter, and this numerical value is passed to built in light energy meter I, with external perimysium reference luminous power for mete-wand, built-in luminous power I meter is calibrated；
Input optical channel self-calibration process is: the optical alignment interface overlapping two-way automatic alignment unit by two connects, two overlap two-way automatic alignment units all with centralized control unit communication, two overlap two-way automatic alignment unit respectively with the built in light power I of the other side for mete-wand, and oneself built in light energy meter II is calibrated；
Input optical channel self calibration terminates rear device self calibration and terminates.
In output optical channel self-calibration process, centralized control unit adjusts the light source mode of light adjustment module, wavelength, optical output power under program, make Output optical power reach predefined parameter, external perimysium reference light power meter and built in light energy meter I measure the Output optical power of light adjustment module simultaneously.
The two two-way automatic alignment units of set that input optical channel self calibration uses are called two-way automatic alignment unit A and two-way automatic alignment unit B, and input optical channel self calibration idiographic flow is:
Centralized control unit under program, adjusts the light source mode of two-way automatic alignment unit A, wavelength, optical output power, makes Output optical power reach predefined parameter；Centralized control unit reads two-way automatic alignment unit A built in light energy meter I numerical value, and this numerical value is passed to two-way automatic alignment unit B built in light energy meter II, with two-way automatic alignment unit A built in light power I for mete-wand, two-way automatic alignment unit B built in light energy meter II is calibrated；In like manner, centralized control unit is under program, adjust the light source mode of two-way automatic alignment unit B, wavelength, optical output power, Output optical power is made to reach predefined parameter, centralized control unit reads two-way automatic alignment unit B built in light energy meter I numerical value, and this numerical value is passed to two-way automatic alignment unit A built in light energy meter II, with two-way automatic alignment unit B built in light power I for mete-wand, two-way automatic alignment unit A built in light energy meter II is calibrated.
Device self calibration makes built in light energy meter I and built in light energy meter II become calibration standard source.Built in light energy meter I can measure or reflect the optical power value that optical alignment interface sends accurately；Built in light energy meter II can measure or reflect the optical power value of optical alignment interface accurately, and batch carries out PON equipment transmitting-receiving optical power calibration on this basis, specific as follows:
A.PON network equipment received optical power is calibrated: outside PON equipment to be calibrated connects optical alignment interface, and with centralized control unit communication, centralized control unit adjusts the light source mode of light adjustment module, wavelength, optical output power under program, Output optical power is made to reach predefined parameter, centralized control unit reads the numerical value of built in light energy meter I, and this numerical value is passed to outside PON equipment to be calibrated, outside PON equipment received optical power to be calibrated is calibrated；Thus realize under different business wavelength, different capacity point is automatically adjusted, automatically calibration PON equipment received optical power.
The B.PON network equipment launches optical power calibration: outside PON equipment to be calibrated connects optical alignment interface, and with centralized control unit communication, centralized control unit adjusts PON equipment to be calibrated under program for launching luminous power state, and adjust transmitting power size in each service wavelength of PON equipment to be calibrated and its business adjusting power control interval, built in light energy meter II monitors the transmitting luminous power of PON equipment to be calibrated in real time, centralized control unit reads the numerical value of built in light energy meter II, and this numerical value is passed to outside PON equipment to be calibrated, outside PON equipment to be calibrated is launched luminous power be calibrated；Thus realize under different business wavelength, different capacity point is automatically adjusted, automatically calibration PON equipment launches luminous power.
Said method will realize each functional module combination of calibration, and be integrated and connected；And application can export light sampling module and can realize same light source real-time sampling is calibrated by real-time online input light sampling module by real-time online in a calibration process；Under centralized control unit control, multiple light courcess, multi-wavelength, many power points bidirectional transmit-receive luminous power are calibrated automatically；Once connect and just can calibrate in batches, need not change.
Centralized control unit has communication function, it may be achieved under outside or remote computer program control or under interactive instruction control, calibrating installation is operated.
Described smooth adjustment module includes the multi-wavelength stable light source being sequentially connected with, wavelength switching control module and optical attenuator, multi-wavelength stable light source, wavelength switching control module is connected with control unit respectively with optical attenuator, multi-wavelength stable light source provides the light of the required wavelength of calibration, wavelength switching control module controls incision at centralized control unit and changes the light of respective wavelength to corresponding port, optical attenuator carries out light intensity decays adjustment under the control of centralized control unit, optical attenuator is the optical attenuator that can be automatically adjusted gain, under the control instruction of centralized control unit, automatically gain transformations is carried out, and then regulate the power level of its output optical signal, thus realizing under different light sources, under different wave length, different capacity point is automatically adjusted.
Described multi-wavelength stable light source includes the output of single mode light source or multimode light sources output or both have concurrently, and corresponding respectively with it, described two-way automatic alignment unit is the two-way automatic alignment unit being suitable for single mode；Or for being suitable for the automatic alignment unit of two-way multimode of multimode；Or both have concurrently.
The structure composition of two-way automatic alignment unit is applicable to the automatic alignment unit of bidirection single-mode, the automatic alignment unit of two-way multimode；That is, its basic structure is consistent, and the difference according to single mode light source, multimode light sources, relevant interface etc. does accommodation.
In order to improve the performance motility of device further, described wavelength switching control module also sets up external light source access port.
Described smooth adjustment module, can real-time online output light sampling module and can the real-time online input integrated package that is integrated of light sampling module or for each independent parts, multi-wavelength stable light source in other words, wavelength switching control module, optical attenuator, can real-time online output light sampling module and can the real-time online input integrated package that is integrated of light sampling module or for each independent parts.
Described centralized control unit adopts microcontroller component or stand-alone computer, can with multi-wavelength stable light source, wavelength switching control module, optical attenuator, can real-time online input light sampling module and can the real-time online output integrated package that is integrated of light sampling module or for each independent parts, if each assembly of device, the integrated package that unit is packaged as a whole, because of the simple of structure, reliability is improved, space and cost are also greatly decreased, if each assembly of device, unit is made up of autonomous device respectively, during use, the mode described in literary composition is attached, the motility of system strengthens.
The built-in communication part of described centralized control unit or connection external communication assembly, with PON equipment to be calibrated, external smart compunication, centralized control unit pass through communication part, be connected with external smart computer, and carry out data exchange and communicate；Form of communication is wired or wireless, serial ports or network interface, so realize remotely, controlled in wireless；For easy to operate, can setting up Input/Output Device interface for equipment, input equipment interface connects input equipment, such as keyboard；Outut device interface connects outut device, for instance display screen, is typically the LCD touch screen of integrated input, output function.
If no special instructions, the optical device described in literary composition is suitable for single mode, multimode two ways.Built in light energy meter described in literary composition, is for external perimysium reference light power meter, its position is not made particular determination, as long as realizing its function.
Embodiment 2:
As shown in Fig. 1 and Fig. 4, for up light, described in the present embodiment, the accuracy controlling method of PON business optical signal power comprises the following steps:
The first step, in PON running, accurate measurement a certain moment ONU uplink service light emitting power value, OLT is in ONU uplink service frame time gap simultaneously, measures the uplink service light receiving power value of corresponding ONU；
Second step, measures up light receiving power value by ONU uplink service light emitting power value and OLT by PON network service in each ONU uplink service frame time gap and pools together；
3rd step, the reception optimization power of OLT deducts OLT and measures up light receiving power value in each ONU uplink service frame time gap, and gained difference is the control value of each ONU uplink service optical signal launch power；
4th step, ONU performs the control value that the 3rd step is calculated, and uplink optical signal power regulation completes.
In above-mentioned second step, PON network service collects descending light receiving power value binding mode OLT downlink business light emitting power value and each optical node ONU recorded multiple way of realization, such as, the respectively data processing equipment of the embedded software of OLT or ONU or peripheral hardware, required numerical value is collected to data processing equipment process, or directly tidal data recovering to optical-fiber network is run the data processing platform (DPP) of system, such as OAM system, then pass through the OAM system data to collecting to process, obtain the control value of each ONU uplink service optical signal launch power, as shown in Figure 4, for the up light of 1310nm, concretely comprise the following steps:
One, ONU1 is issued time synchronized instruction by OLT by OAM system；ONU1 replys and synchronizes successfully；
Two, OAM regulates and controls the up smooth 1310nm measuring light power management of OLT transmission ONU1, and OLT measures up 1310nm received optical power in ONU1 uplink service frame time gap, records the up transmitting optical power value of ONU1 simultaneously and is pooled to OAM system；
Three, OAM systems soft ware, the reception optimization power of OLT deducts OLT and measures up 1310nm received optical power in ONU1 uplink service frame time gap, and gained difference is the control value of ONU1 uplink service optical signal launch power；
Four, ONU1 is issued control value and the regulation and control instruction of uplink service optical signal launch power by OAM by OLT, and ONU1 completes associated regulatory.
Above-mentioned steps preserves regulation and control running log while carrying out, as the foundation of optical-fiber network running quality, business regulation and control and fault type investigation.
In the 3rd step running, OAM can calculate the up smooth 1310nm of ONU1 simultaneously and launch optical power value and OLT and measure the difference of up 1310nm received optical power value in ONU1 uplink service frame time gap, and gained difference is the optical link loss of ONU1 optical node；And preserve running log, as the foundation that optical-fiber network running quality and business regulate and control.
Embodiment 3:
The present embodiment can export light sampling module and also can share bi-directional light shunt by real-time online input light sampling module by real-time online, bi-directional light splitter output is respectively connecting to built in light energy meter I and built in light energy meter II, bi-directional light shunt one road input is connected to optical alignment interface, another road input is connected to light adjustment module, built in light energy meter I and built in light energy meter II connect centralized control unit respectively, this scheme and aforementioned schemes are distinctive in that and can export light sampling module and can share bi-directional light shunt by real-time online input light sampling module by real-time online.
It is clear that the present invention is not limiting as the accuracy controlling for online accurate measurement PON business optical signal power, under the guidance of inventive concept, it is also possible to for regulation and control and the related application of wavelength division multiplexed network and other parameters.
Although the present invention illustrates with reference to preferred embodiment and accompanying drawing, but above-mentioned explanation should be regarded as illustrative and non-limiting, and change that those skilled in the art makes according to the spirit of the present invention and amendment should belong to the protection domain of this patent.
Claims (9)
1. the accuracy controlling method of a PON business optical signal power, it is characterised in that comprise the following steps:
The first step, in PON running, carrys out transmitting and the received optical power value of each optical node related service wavelength in accurate measurement a certain moment optical-fiber network topology with PON equipment；
Second step, is pooled together by the optical network service transmitting by each for this moment optical node related service wavelength and received optical power value；
3rd step, the receiving of the related service wavelength of arbitrary optical node optimizes power and deducts the received optical power value of this moment related service wavelength measurement of aforementioned optical node, the control value of the related service wavelength transmitting power that gained difference is in optical-fiber network topology optical node optical network device corresponding to this articulare；
4th, according to the control value that the 3rd step is calculated, PON equipment is performed regulation and control.
2. the accuracy controlling method of PON business optical signal power according to claim 1, it is characterised in that step is specifically regulated and controled for downlink business light as follows:
The first step, in PON running, accurate measurement a certain moment OLT downlink business light emitting power value, the corresponding downlink business light receiving power value that under OLT, each optical node ONU will now record simultaneously；
Second step, is pooled together the descending light receiving power value that OLT downlink business light emitting power value and each optical node ONU record by PON network service；
3rd step, the reception of ONU optimizes power, deducts minima in the descending light receiving power value recorded of each optical node ONU under OLT, and gained difference is the control value of OLT downlink business optical signal launch power；
4th step, performs regulation and control according to the control value that the 3rd step is calculated to OLT downlink business optical signal launch power, and downlink business light optical signal power has regulated and controled.
3. the accuracy controlling method of PON business optical signal power according to claim 1, it is characterised in that step is specifically regulated and controled for uplink service light as follows:
The first step, in PON running, accurate measurement a certain moment ONU uplink service light emitting power value, OLT is in ONU uplink service frame time gap simultaneously, measures the uplink service light receiving power value of corresponding ONU；
Second step, measures up light receiving power value by ONU uplink service light emitting power value and OLT by PON network service in each ONU uplink service frame time gap and pools together；
3rd step, the reception optimization power of OLT deducts OLT and measures up light receiving power value in each ONU uplink service frame time gap, and gained difference is the control value of each ONU uplink service optical signal launch power；
4th step, ONU performs the control value that the 3rd step is calculated, and uplink optical signal power regulation completes.
4. the accuracy controlling method of the PON business optical signal power according to any one of claim 1-3, it is characterized in that, before carrying out the first step, first pass through transmission and the received optical power of PON equipment bidirectional transmit-receive luminous power self-checking device calibration PON equipment.
5. the accuracy controlling method of PON business optical signal power according to claim 4, it is characterized in that, described PON equipment bidirectional transmit-receive luminous power self-checking device, including at least a set of two-way automatic alignment unit and centralized control unit, described two-way automatic alignment unit is connected with centralized control unit, light adjustment module that two-way automatic alignment unit includes being sequentially connected with, can real-time online output light sampling module and can real-time online input light sampling module, can be connected with optical alignment interface by real-time online input light sampling module.
6. the accuracy controlling method of PON business optical signal power according to claim 4, it is characterized in that, described can real-time online output light sampling module include optical branching device I, built in light energy meter I, optical branching device I input connects light adjustment module, optical branching device I outfan one tunnel connects and can input light sampling module by real-time online, the other end of optical branching device I output connects built in light energy meter I, built in light energy meter I connects centralized control unit, can monitor the Output optical power of optical alignment interface in real time；Optical branching device II, built in light energy meter II can be included by real-time online input light sampling module, optical branching device II outfan one tunnel connects and can export light sampling module by real-time online, the other end of optical branching device II output connects built in light energy meter II, optical branching device II input connects optical alignment interface, built in light energy meter II connects centralized control unit, can monitor optical alignment interface input optical power in real time.
7. the accuracy controlling method of PON business optical signal power according to claim 4, it is characterised in that the calibration transmitting of optical network device of described PON equipment bidirectional transmit-receive luminous power self-checking device and received optical power method be:
The first step, PON equipment bidirectional transmit-receive luminous power self-checking device carries out self calibration；
Second step, outside PON equipment to be calibrated connects PON equipment bidirectional transmit-receive luminous power self-checking device, and the transmitting-receiving luminous power of PON equipment to be calibrated is calibrated.
8. the accuracy controlling method of PON business optical signal power according to claim 7, it is characterized in that, described first step self calibration includes input optical channel self calibration and output optical channel self calibration, wherein, output optical channel self-calibration process is: external perimysium reference light power meter connects optical alignment interface, and with centralized control unit communication, centralized control unit adjusts the light source mode of light adjustment module under program, wavelength, optical output power, Output optical power is made to reach predefined parameter, external perimysium reference light power meter and built in light energy meter I measure Output optical power simultaneously, centralized control unit reads the numerical value of external perimysium reference light power meter, and this numerical value is passed to built in light energy meter I, with external perimysium reference luminous power for mete-wand, built-in luminous power I meter is calibrated；
Input optical channel self-calibration process is: after output optical channel self calibration completes, the optical alignment interface overlapping two-way automatic alignment unit by two connects, two overlap two-way automatic alignment units all with centralized control unit communication, two overlap two-way automatic alignment unit respectively with the built in light power I of the other side for mete-wand, and oneself built in light energy meter II is calibrated；
Input optical channel self calibration terminates rear device self calibration and terminates.
9. the accuracy controlling method of PON business optical signal power according to claim 5, it is characterised in that PON equipment bidirectional transmit-receive luminous power to be calibrated is carried out synchronous calibration by described second step simultaneously, mainly includes following two aspect:
A.PON network equipment received optical power is calibrated: outside PON equipment to be calibrated connects optical alignment interface, and with centralized control unit communication, centralized control unit adjusts the light source mode of light adjustment module, wavelength, optical output power under program, Output optical power is made to reach predefined parameter, centralized control unit reads the numerical value of built in light energy meter I, and this numerical value is passed to outside PON equipment to be calibrated, outside PON equipment received optical power to be calibrated is calibrated；
The B.PON network equipment launches optical power calibration: outside PON equipment to be calibrated connects optical alignment interface, and with centralized control unit communication, centralized control unit adjusts PON equipment to be calibrated under program for launching luminous power state, and adjust transmitting power size in each service wavelength of PON equipment to be calibrated and its business adjusting power control interval, built in light energy meter II monitors the transmitting luminous power of PON equipment to be calibrated in real time, centralized control unit reads the numerical value of built in light energy meter II, and this numerical value is passed to outside PON equipment to be calibrated, outside PON equipment to be calibrated is launched luminous power be calibrated.
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