CN1527525A - Dynamic channel power equalizing control device and method in optical terminal of optical network - Google Patents

Dynamic channel power equalizing control device and method in optical terminal of optical network Download PDF

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CN1527525A
CN1527525A CNA031157335A CN03115733A CN1527525A CN 1527525 A CN1527525 A CN 1527525A CN A031157335 A CNA031157335 A CN A031157335A CN 03115733 A CN03115733 A CN 03115733A CN 1527525 A CN1527525 A CN 1527525A
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controller
control
optical
node
spectrum
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CN100472995C (en
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王加莹
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ZTE Corp
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Abstract

The present invention relates to densified wavelength division multiplexing optical terminal equipment in optical communication network. The present invention has integrated attenuator array set in the emitting end and the receiving end for regulation, and is suitable for both wavelength division multiplexing optical terminal with opened light interface and optical terminal with integrated light interface. By means of the power value of optical terminal as a static work point performance and the similarity between the practical light channel power spectrum and the target power spectrum, automatically regulating optical system is constituted through iterative control, detection, analysis and control. Regulating network spectrum in real time and dynamically can ensure the stable network transmission performance.

Description

Realize the channel power dynamic equalization control device and the method for optical-fiber network optical transceiver
Technical field
The present invention relates to a kind of channel power dynamic equalization control device and method that realizes the optical-fiber network optical transceiver.Specifically be in a kind of wavelength division multiplexed optical network optical transceiver, the optical channel power of different centre wavelengths is realized the device and method of dynamic equalization adjusting control, relate in particular to the dense wave division multipurpose optical-fiber network optical transceiver equipment of communication field, the present invention can make the channel power of optical transceiver in the optical-fiber network distribute and be regulated dynamically.
Background technology
Dense wave division multipurpose (DWDM) Fibre Optical Communication Technology just develops towards overlength ultrahigh speed, big capacity and dynamic configurable networked direction, and the optical channel power control techniques has been proposed more and more higher requirement.In the DWDM optical transmission system because the gain or the loss of image intensifer, Transmission Fibers, dispersive compensation element and other opticses are relevant with wavelength, so generally in the optical transmission chain each channel power be unbalanced.
For example in big capacity point-to-point transmission system, because whole passage occupied bandwidth broad (for example a kind of 160 wave devices, cross over the about 80nm of bandwidth altogether at C-band and L-band), all fall into for the received power that makes all passages in the error performance scope of receiver optimization, obtain passage unanimity, good systematic function, the passage consistency transmission requirement of whole system various piece is increased.Overcome each active, passive part brings on the transmission channel channel power inconsistency and become one of problem that big capacity, long haul transmission system face.
In addition, the Optical Fiber Transmission in broadband range can make some nonlinear effect of optical fiber strengthen, and for example stimulated Raman scattering (SRS) effect can make short wavelength's channel power of DWDM signal shift to long wavelength's passage, causes the remarkable inclination of channel power spectrum.When each optical channel power difference of receiving terminal is excessive, receiver sensitivity significantly improves the error rate, the higher passage of power can or be higher than receiver overload power point because of convergence significantly worsens error code even the receiving terminal passage average power optimum input power that is receiver, the passage that power is lower can or be lower than because of convergence.The big volume transport that makes of this situation is failed.
Usually, in transmitting end equipment, change laser output power by regulating each transmitting terminal optical convering unit inner laser device drive current, can realize the preequalization of each optical channel, the shortcoming of doing like this is: the Output optical power adjusting of (1) laser can make the output light wavelength change, and the dynamic effect that produces during power adjustments also is a unfavorable factor.Under system running state, regulate and improved the equipment operation risk.(2), make that the detection power of each optical convering unit is variant, the relation between laser drive current and the power output is also variant, is unfavorable for the automatic maintenance of system because the performance discreteness of laser and electronic circuit.(3) the adjustable range Stimulated Light device performance of optical convering unit output light and the restriction of drive circuit thereof, general provision is regulated (for example stipulating in People's Republic of China's communication industry standard " YD/T 1060-2000 light wavelength-multiplexing systems (WDM) specification requirement " that the optical convering unit Output optical power is in-3 ± 2dB scope) in limited scope.Under big number of wavelengths situation in order to guarantee that the receiving terminal channel power is smooth and adjusting that carry out might surpass suitable scope.
Usually, equipment control and control system will be gathered the input power detected value of receiving terminal optical convering unit, when equipment is safeguarded, after the current received power of each channel in the manual operation equipment management system inquiry optical transceiver, the user can and regulate target according to the current detection result and issue the power adjustments instruction to the transmitting terminal optical convering unit.
In super-high density, big capacity wavelength division multiplexing optical transceiver equipment (for example 160 wave devices), because optical channel quantity is excessive, the manual operation equipment management system carries out that equipment performance detects and maintenance workload is huge.
Summary of the invention
Purpose of the present invention is exactly the shortcoming of deterioration in order to overcome in the optical WDM communication equipment that the channel power distribution prolongs with transmission range and gradually, proposes a kind of channel power dynamic equalization control device and method that realizes the optical-fiber network optical transceiver.
In the wavelength division multiplexed optical network optical transceiver, optical channel power is carried out equilibrium and regulate, can realize the spectral constraints condition of long distance transmission lines transmitting terminal and receiving terminal, help realizing the benign state of each optical channel power evolutionary process at whole transmission line.In order to reach real time implementation, mobilism ground regulating networks spectrum, to guarantee that network transmission performance is stable, to detect in real time transmission spectrum at network internal object test point, and carry out real-time analysis according to node channel power distribution principle, obtain the configuration data of optimization, and the channel power enforcement commands for controlling to controlling, the optical transmission system that has the intelligent optics characteristics of management with formation.Real time implementation, mobilism ground regulating networks spectrum can guarantee that network transmission performance is stable.
Core concept of the present invention is: the transmitting terminal of optical transceiver close in the wave energy structure and/or receiving terminal partial wave functional structure in adjustable attenuator is set, constitute attenuator array jointly, to realize channel power equalization control.
Under the equipment normal operating conditions, the passage mean value of amplifier power output should keep stable; Relation between amplifier in power and the output power is answered coincidence amplifier gain-adjusted scope.Optical transceiver is the quiescent point performance of equipment in the performance number of multiplex section, is one of equipment constraints of carrying out dynamic adjustments.It then is another constraints that equipment carries out dynamic adjustments that similitude constraints between optical channel power spectrum and the target power spectrum is arranged in fact.
The present invention specifically is achieved in that
A kind of channel power dynamic equalization control device of realizing the optical-fiber network optical transceiver comprises the optical transmission pathway that is made of image intensifer, it is characterized in that this device also comprises:
Close in wave energy structure and/or the receiving terminal partial wave functional structure at the optical transceiver transmitting terminal, the attenuator array that is made of the power adjustments attenuator be set,
Amplifier controller obtains current gain, the optical transceiver performance number at multiplex section according to the light testing result, changes the amplifier drive current when change in gain, carries out gain locking through amplifier application interface pair amplifier; When this performance number departs from nominal operation point, change control data, regulate through amplifier control interface amplifier average gain,
The channel power balance controller obtains the performance number of optical transceiver at multiplex section according to the light testing result, and changes control data when performance number departs from nominal operation point, through the attenuator array control interface each channel attenuation amount of attenuator array is regulated,
The spectral detection controller, the control interface that connects by communication/control line is respectively applied for: starts or closes spectroscopic detector, accepts the scan-data that after spectral detection, obtains, the port of switches light switch,
Node Controller, storing detected reality has the target power spectrum of passage, after the reality that obtains spectral detection has the channel power spectrum, carrying out spectral similarity judges, there are channel power spectrum and target power spectrum to differ greatly in fact, after surpassing similitude constraints, then send the optical channel power adjustment commands to optical transceiver;
Test point in the input of closing wave energy structure, amplifier, partial wave functional structure, output setting detects luminous power respectively, is converted to amplifier controller or channel power equalization controller through Photoelectric Detection and A/D;
The spectral detection point that is provided with at local node or downstream node inserts spectroscopic detector, through the control interface of communication/control line connection to the spectral detection controller;
Described amplifier controller, channel power equalization device controller link to each other with devices communicating/control bus by the I/O interface, the work at present state is reported to the Node Controller that links to each other with devices communicating/control bus, orders such as the gain configuration change that slave unit communication/control bus acquisition Node Controller issues, the change of optical transceiver quiescent point, attenuator array passages regulate;
Described spectral detection controller links to each other with devices communicating/control bus by equipment I/O interface, can implement spectral scan by the receiving node controller, also spectroscopic data can be reported;
Between node, the information that described Node Controller sends realizes transmitting by route and transponder.
To regulate optical transceiver, need and to detect in real time transmission spectrum at network internal object test point, according to impact point situation is set and be divided into local the detection and two kinds of situations of strange land (downstream) detection.
So-called local the detection and the strange land detection is meant the impact point position that spectrum is regulated, and is in local node or downstream node.If regulate impact point in this locality, then need implement spectral detection in this locality.If regulate impact point, then need implement spectral detection at the strange land impact point in the strange land.The spectral detection point should insert channel power spectrum scanning means, and scanning means can be automatically carries out channel spectrum test (autosensing mode) to test point (can more than 1) under the management of spectral detection controller; Or externally the spectrum test (order drainage pattern) of specifying test point is down controlled in order.The spectral detection controller links to each other with devices communicating/control bus by equipment I/O interface, and instruction enforcement spectral scan that can the output of receiving node controller also can report spectroscopic data.
Node Controller at spectral detection impact point place stores the real target power spectrum that passage is arranged of test point.After the reality that obtains spectral detection has the channel power spectrum, can carry out spectral similarity and judge.There are channel power spectrum and target power spectrum to differ greatly in fact,, then send the optical channel power adjustment commands to optical transceiver above after the similitude constraints.
Control device to optical transceiver is regulated also can be divided into local master control and two kinds of situations of strange land master control according to the position.So-called local master control or strange land master control are meant that the user that can carry out functions such as test point target power spectral editing, optical transceiver service behaviour are regulated, optical transceiver optical channel power dynamic balance control model is provided with operates the node at place, are in this locality or in the strange land.
Between node, the information that Node Controller sends realizes transmitting by route and transponder.When main control computer in this locality, the information that sends to the strange land is delivered to route and transponder output after judging by the local node controller.
Under the automatic maintenance work state of equipment, the target spectrum is present in the Node Controller of test point, and Node Controller is periodically inquired about the spectral detection data, and compares with the target spectrum.In case difference surpasses certain norm (representing two differences between the spectrum data) thresholding, then integration objective spectrum and current detection spectrum obtain and need regulate spectrum in the target that transmitting terminal is realized.If the spectral detection point is positioned at the optical transceiver output, promptly be controlled at same node with channel-equalization, then the Node Controller in the optical transceiver will send to channel power equalization device controller with the adjusting request by devices communicating/control bus regulating spectrum information; If test point is at other node of the downstream of channel-equalization Control Node, the Node Controller of test point will be regulating spectrum information and regulating and ask to send to the upstream optical transceiver with channel power equalization ability by the routing forwarding device.Regulate the channel power relative different behind the channel power equalization device controller response command.
Can interfere under the operating state the user, after by main control computer impact point spectrum being edited, be issued to test point place Node Controller, and start adjusting.Node Controller only when receiving adjusting command, is just inquired about the spectral detection data, and compares with the target spectrum.In case difference surpasses regulation norm thresholding, then the integration objective spectrum obtains and need regulate spectrum in the target that the optical transceiver transmitting terminal is realized with the current detection spectrum.If spectral detection point output in this optical transceiver, then the optical transceiver Node Controller will be regulating spectrum information and regulating and ask to send to channel power equalization device controller by devices communicating/control bus; If test point is at other node of the downstream of channel-equalization Control Node, the test point Node Controller will be regulated the channel power relative different regulating spectrum information and regulating and ask to send to upstream optical transceiver channel power equalization device controller by the routing forwarding device behind the channel power equalization device controller response command.
Go again after the adjusting and inquire about spectrum, if difference still above regulation norm thresholding, is then composed target once more and the current detection spectrum subtraction obtains and need compose in the adjusting that the channel power equalization node is realized.The test point Node Controller will send to the channel power equalization node to the new decay spectra information and the request of regulating by the routing forwarding device, implement secondary automatically and regulate.
The present invention realizes that the total step summary of the method for dynamic gain spectrum adjusting is as follows:
Step 1, when moving in system, control unit requires to set yield value, each channel attenuation amount initial value of attenuator array of image intensifer in the optical transceiver according to the system initial design.Under no-console condition, carry out work according to the initial power configuration status;
Step 2, under automatic service mode or the user interfere under the control, detecting target place node, its Node Controller requires spectral detection point to compose monitoring means by optical channel to monitor out each channel power of key light path and report controller;
Step 3, this Node Controller are according to the data that report, compare with the destination channel power spectrum that is stored in the impact point Node Controller, target spectrum according to system calculates the relative adjustment spectrum, and data format by appointment sends to optical transceiver dynamic channel balance controller, realizes dynamic adjustments;
In this step, if spectral detection point output in this optical transceiver, then the optical transceiver Node Controller will be regulating spectrum information and regulating and ask to send to channel power equalization device controller by devices communicating/control bus;
If test point is at other node of the downstream of channel-equalization Control Node, the test point Node Controller will be regulated the channel power relative different regulating spectrum information and regulating and ask to send to upstream optical transceiver channel power equalization device controller by the routing forwarding device behind the channel power equalization device controller response command.
The performance of the Node Controller commander spectrum monitoring unit duplicate measurements main optical path of step 4, target detection point also reports controller, and controller carries out data processing and comparison, as meets the demands, and then dynamically control finishes, and claims one time iteration control.If can not meet the demands, then return step 3, carry out iteration control once more;
Step 3, four above repeating, through iteration control repeatedly up to the requirement of satisfying system.In each iterative process, implement quiescent point locking control automatically at dynamic equalizer.
The present invention uses the integrated attenuator array of circuit control to regulate, and both has been applicable to the wavelength division multiplexing optical transceiver with open optical interface, also is applicable to the optical transceiver with integrating optical interface.When channel power is adjusted, not only avoided the unfavorable variation of light source, also improved adjustable range, help system and realize safeguarding automatically.Service data derives from the channel power value of test point, plant control unit is through the integrated attenuator array work at present attenuation of inquiry, can generate regulating command automatically according to the adjusting target that is preset in the control system, issue the power adjustments data to attenuator array.
Not only,, can realize the power preequalization by integrated attenuator array is set at transmitting terminal.At receiving terminal, also can carry out power equalization by integrated attenuator array is set, guarantee that the power of all channels of receiving terminal all falls in the best input power range of receiving terminal OTU.When system does not dispose receiving terminal OTU, also can carry out data acquisition by increasing the passage detectability at channel-splitting filter.
Use node structure of the present invention, detection and control method, can real time implementation, mobilism ground regulating networks spectrum, guarantee that as much as possible network transmission performance is stable.
Description of drawings
Fig. 1 has the optical transceiver transmitting terminal structure chart (integrating optical interface) of dynamic channel power equalization function,
Fig. 2 has the optical transceiver transmitting terminal structure chart (open optical interface) of dynamic channel power equalization function,
The transmission system structure chart that Fig. 3 strange land is detected or the strange land is controlled,
Fig. 4 has the transmitting terminal composite wave appts structure chart of channel packet power equalization,
The beam split of Fig. 5 receiving terminal channel-splitting filter detects channel power, channel equalization structure chart,
The beam split of Fig. 6 receiving terminal channel-splitting filter detects channel power, grouping equalizing structure figure,
Fig. 7 channel power balance controller workflow,
Fig. 8 is an optical transceiver amplifier controller workflow,
Fig. 9 spectral detection controller workflow,
The automatic service mode lower node of Figure 10 controller workflow,
Figure 11 user's interference pattern lower node controller workflow.
Among the figure: 100: close/the multiplexing end optical interface of channel-splitting filter connector; 110: close/the multiplexing end light detection of channel-splitting filter optical splitter; 101,102,103,104,105,106: single wavelength channel optical interface connector; 111,112 ..., 113: attenuator array inputs or outputs light and detects optical splitter; 120: attenuator array; 121,122 ..., 123: attenuator array internal power regulated attenuator; 124: the attenuator array control interface; 131,132 ..., 133: every passage input light detector tube; 141,142 ..., 143: every passage input light detecting signal amplifier; 130: close/the multiplexing end light of channel-splitting filter detector tube; 140: close/the multiplexing end light detecting signal of channel-splitting filter amplifier; 11,13,150: close/channel-splitting filter; 151: the group band closes/channel-splitting filter; 160:AD and DA change-over circuit; 161: the digital signal connecting line; 162: the channel power equalization controller circuitry; 163: power equalization controller communication interface; 164: the control bus interface signal line; 170: the attenuator control signal wire; 200: light signal output interface connector; 201: light signal input interface connector; 202: amplifier input light detects optical splitter; 203: amplifier output light detects optical splitter; 204: the amplifier output spectrum detects optical splitter; 210: image intensifer; 211: image intensifer control and driving interface; 220: detect light output fiber; 221: the external interface connector; 231: amplifier input light detecting device; 232: amplifier output light detecting device; 241: input light detecting signal amplifier; 242: output light detecting signal amplifier; 243: amplifier drive circuit; The 260:AD/DA change-over circuit; 261: the digital signal connecting line; 262: the amplifier controller circuit; 263: the amplifier controller communication interface; 264: the control bus interface signal line; 301,302,303,304: multichannel input optical interface connector; 305: optical switch; 306: spectroscopic detector; 307: the spectroscopic detector control interface; 308: interface signal line; 309: the spectral detection controller circuitry; 310: the communication interface of spectral detection control circuit; 311: interface signal line; 312: the optical switch control signal line; 401,601: interface signal line; 402,602: the device communication interface circuit; 403,603: the Computer Communications Interface circuit; 404,604: Node Controller; 405,605: pilot signal route and transponder; 501,502 ..., 503: open input optical interface connector; 511,512 ..., 513: open output optical interface connector; 520: the optical convering unit array; 562: laser detects and control circuit; 563: the laser controller communication interface; 564: the control bus interface signal line; 1: transmitting terminal light signal output point; 2: receiving terminal light signal input point; 3,10: devices communicating and control bus; 4: upstream node pilot signal routing forwarding direction; 5: main control computer; 6: signal cable; 7: downstream node optical channel power detection point; 8: downstream node pilot signal routing forwarding direction; 9: the downstream node light signal transmits passage; 11: light signal transfer path between node.
Embodiment
One, hardware unit
Fig. 1 has the optical transceiver transmitting terminal structure chart of dynamic channel power equalization function, and optical transceiver has the channel power equalization function, can implement the emission spectrum performance monitoring in this locality, and can implement editor and control to transmission spectrum at local node.What provide among Fig. 1 is the hardware part of single directional light transmission in the terminal.If the wavelength-division-multiplexed optical signal of oriented other directions emissions in the optical transceiver, then the channel power equalization device of other transmission directions is identical with part described in the figure.
In optical transceiver, the light signal of multichannel from optical convering unit arranged, these light signals need close and be amplified to suitable power behind the ripple and transmit.Hardware unit in optical transceiver comprises following part: wave multiplexer, light attenuator array and controller part (100,101,102,103,110 thereof, 111,112,113,120,121,122,123,124,130,131,132,133,140,141,142,143,150,160,161,162,163,164,170), amplifier and controller part (200,201 thereof, 202,203,204,210,211,231,232,241,242,243,260,261,262,263,264), spectroscopic detector and controller part (301,302,305 thereof, 306,307,308,309,310,311), more than four parts be connected to each other by optical interface connector and devices communicating bus (3) interface, separable physically.Node Controller and the communication interface (401,402,403,404) thereof in addition that are connected with bus.User's main control computer (5) is connected with Node Controller with communication interface by cable (6).
From the optical signals of a plurality of optical convering units respectively by the optical interface connector (101,102 ..., 103) input detects optical splitter (111,112 through input, ..., 113), light attenuator array (120), wave multiplexer (150), wave multiplexer output light detects optical splitter (110), optical interface connector (100,201), the amplifier input detects optical splitter (202), image intensifer (210), output light detects optical splitter (203,204), exports from optical interface connector (200).Constitute unidirectional light emission path with top.
Detect optical splitter (111 from each passage input, 112, ..., 113) output light pass through Photoelectric Detection pipe (131,132 respectively, ..., 133) carry out forming the detection electric current after the opto-electronic conversion, pass through amplifying circuit (141,142 more respectively, ..., 143) realize being amplified into AD, DA change-over circuit (160).Through data-signal process communication/control line (161) the admission passage power equalization controller (162) that obtains after the analog-to-digital conversion.Controller will make each optical channel obtain suitable decay by control interface connecting line (170) control attenuator array.
Channel power equalization controller (162) is connected with devices communicating/control bus (3) by I/O interface circuit (163), in the interface connecting line (164), should comprise input signal and output signal.The channel power equalization controller can send to bus (3) with attenuator array state of a control and warning information etc., also can receive from bus (3) and carry out attenuator array decay spectra changed information.
From optical splitter (202,203) input detects light to the light of telling as image intensifer respectively, output detects light, they pass through Photoelectric Detection pipe (231 respectively, 232) carry out forming detection signal (signal of telecommunication) after the opto-electronic conversion, pass through detection signal amplifier (241 more respectively, 242) after the amplification, the formation data-signal entered amplifier controller through communication/control line (261) after process AD/DA change-over circuit (260) carried out analog-to-digital conversion.Utilize this data-signal, amplifier controller can calculate each Amplifier Gain value.Amplifier controller can also be compared current gain value and the yield value (being Configuration Values) that expectation reaches, and when variant control amplifier is changed current yield value up to conforming to Configuration Values.
In the time will changing Amplifier Gain, amplifier controller will be exported driving data, be input to AD/DA change-over circuit (260) through communication/control line (261), driving data forms Control current through after the digital-to-analogue conversion, passes through to be input to amplifier control interface (211) after drive current amplifying circuit (243) suitably amplifies again.Amplifier inside should have pump laser, and its drive terminal should be included in this amplifier control interface (211).
Amplifier controller (262) is connected with devices communicating/control bus (3) by I/O interface circuit (263), in the interface connecting line (264), should comprise input signal and output signal.Amplifier controller can be delivered to amplifier gain state of value information bus (3), also can be from bus (3) receiving gain Configuration Values and gain controlling information.
Realize the output light collection at the optical splitter (204) of amplifier out, the light that connection line of optic fibre (220) will be gathered is input to spectral detection and control section by connector (221).Among Fig. 1 this part have a plurality of input optical interface connectors (301 ..., 302), be that expression realizes the spectral detection to a plurality of test points in the equipment, especially be suitable for Device memory when the processing node of a plurality of light directions.Can select an optical switch (305) to realize the switching of each test point by multichannel.The device (306) of realizing spectral detection is a spectrometer, or a channel power detector.Spectroscopic detector control circuit (309) is connected to the control interface (307) of spectroscopic detector by communication/control line (308).Can start or close spectroscopic detector, the scan-data that obtains after spectral detection can be delivered to controller (309) by interface connecting line (308) through interface (307) output.The spectral detection controller also can output to optical switch with signal through control line (312), the switches light switch port.
Spectral detection controller (309) is connected with devices communicating/control bus (2) by I/O interface circuit (310), in the interface connecting line (311), should comprise input signal and output signal.The spectral detection controller can output to spectroscopic data bus (3), also can detect from bus (3) receiving spectrum to start/cease and desist order and the test point select command.
Node Controller (404) is the device that local device is carried out status information capture and control information dispensing.Related repertoire group on the optical transmission direction that the collection of Node Controller and control range had both comprised among Fig. 1 to be showed also comprises among the figure not related repertoire group on other optical transmission direction of performance.Node Controller (404) is connected by the same devices communicating/control bus of I/O interface circuit (3).In the interface connecting line (401), should comprise input signal cable and output signal line.By importing out holding wire, can obtain the job information of all functions group that is connected with bus (3), comprise the current gain of amplifier, current average Insertion Loss of balanced control phase, spectral detection are put current scan-data etc.By output signal line, can adjust order, attenuator array quiescent point adjustment order, the adjusting command of channel power spectrum, spectral detection order etc. to the gain of bus (3) output amplifier.Node Controller (404) also by Computer I/O interface circuit (403), is connected with computer (5) by cable (6).User application software in the computer provides spectrum control user application interface (GUI), and by computer, the user can edit the target optical spectrum of spectral detection point, and can implement user intervention to intranodal channel power equalization device by computer.When carrying out user intervention, the target optical spectrum behind the editor can be delivered to Node Controller (404) by Computer Communications Interface (403), and is stored in the interior memory of controller.The user can also issue an order to Node Controller, realization is to the definition and the configuration of intranodal amplifier working point, attenuator array working point, spectral detection point, can also switch the mode of operation of channel power equalization, enter automatic service mode or user intervention pattern.Under the user intervention pattern, when having only the user to assign the regulating command of channel power spectrum by control computer GUI, Node Controller just drives each part and implements channel power spectrum control (satisfying two constraintss mentioned above); Under automatic service mode, Node Controller will periodically be gathered spectral detection information, and compare with target optical spectrum, in case spectral detection information deterioration promptly starts attenuator array and image intensifer automatically and implements channel power spectrum control (satisfying two constraintss mentioned above).
Need explanation, the represented structure chart of Fig. 1 has the integrating optical interface characteristics.Detect because of carrying out luminous power at this locality input optical interface, so its institute's optical sender that connects can be at local device, also can be away from local device.
Also need explanation, also applicable to the situation of no amplifier, total optical power detects by 110,130 Fig. 1 structure when no amplifier, and 140,160 realize.
When equipment had open optical interface, dynamic power control still can be implemented according to the mode of Fig. 1, and different is to have the optical convering unit of realizing open optical interface function in equipment.
When equipment provided open optical interface, the optical transceiver folk prescription was represented to structure chart such as Fig. 2 of transmitting terminal, as with another embodiment of Fig. 1 same idea.
In Fig. 2, the same meaning of following part and Fig. 1: wave multiplexer, attenuator array and controller part thereof, amplifier and controller part thereof, spectroscopic detector and controller part thereof, intranodal devices communicating and control bus, Node Controller and communication interface thereof, user's main control computer and stube cable etc.
Different open optical interface and the control sections (501,502,503,520,511,512,513,562,563,564) of being with Fig. 1.Comprising open input optical interface connector (501,502 ..., 503), be used to import a plurality of independently optical passage signals; Optical convering unit array (520) comprises a plurality of light/electricity/light conversion device, is used for input optical signal is converted to the light signal that meets the requirement of wave multiplexer input optical wavelength.All comprise a laser in each road light/electricity/light conversion device wherein, laser is controlled the control of circuit (562), and performance informations such as its Output optical power detected value are fed back to control circuit (562).Using method to laser can be with reference to the international uniform interface specification of commercial lasers device.Therefore can know the optical power value of each optical channel at laser control and testing circuit (562).
Laser control is connected with devices communicating/control bus (3) by I/O interface circuit (563) with testing circuit (562), in the interface connecting line (564), should comprise input signal and output signal.Laser control and testing circuit can each optical channel input, export light state information and deliver to bus (3), also can be from bus (3) received optical power control information.
Need to prove, in the device of the present invention, though do not advise realizing channel-equalization by the operating state of regulating each laser in the optical convering unit array (520), but realize channel-equalization by the optical convering unit output attenuator that connects, but this specification hereinafter the described algorithm of second joint be applicable to that still changing each laser drive current by laser detection and control circuit (562) in optical convering unit array (520) realizes power adjustments.
Fig. 3 is the transmission system structure chart that the strange land is detected or the strange land is controlled, be different with Fig. 1, and spectral detection point and user's main control computer are positioned at downstream node.Fig. 2 is as another embodiment with node of dynamic power equalization function.In long dwdm system apart from without electronic relay, the result that channel power is regulated is for the performance of assurance system at receiving terminal.Therefore the channel power test point can be in a certain downstream node (line node or receiving terminal node) away from the optical transceiver transmitting terminal.
Controlled light direction among Fig. 3 in upstream node, comprise following part: wave multiplexer, attenuator array and controller part thereof, amplifier and controller part thereof, intranodal devices communicating and control bus, Node Controller and routing forwarding device part and communication interface thereof etc. are with the same meaning of top and Fig. 1 relevant portion.Other light direction of this intranodal need realize controlling that hardware configuration direction therewith is identical.Controlled light direction at downstream node comprises following part: have the light drive access (9) of spectral detection point, spectroscopic detector and controller part (301 thereof, 302,305,306,307,308,309,310,311), node control and routing forwarding device part (601-606), intranodal devices communicating and control bus (10), user's main control computer (5) and stube cable (6) etc.Other light directions of this intranodal need be implemented to detect, and hardware configuration direction therewith is identical.
Upstream node arrives downstream node through optical line by (11) along the light signal of the light direction transmission of emission path, and the direction along light path (9) transmits in downstream node.Can compose by the channel power of control upstream node, and spectral detection point (7) obtains target spectrum as well as possible in downstream node.
The Node Controller (404) of figure middle and upper reaches transmitting terminal intranodal carries out status information capture and control information dispensing to local device.Different with Fig. 1, Node Controller (404) directly links to each other with routing forwarding device (405) again, the state information that each function group of this intranodal is reported can regularly be sent to route and transponder (405), in route and transponder, the information that needs to transmit is divided into the packets of information of being with address mark, exports from pilot signal delivery port (4).Address mark is realized the node of user's master control for needing to receive this output state information.Simultaneously, can receive the packets of information of sending here from user's main controlled node that has address mark, after route and transponder (405) unpack, deliver to Node Controller from pilot signal delivery port (4).The information that transmits comprises the control information to this node, for example amplifier gain control information, the control information of channel power spectrum, attenuator array output quiescent point adjusting information etc.
In the downstream node, the spectral detection point on transmission channel (9) has spectral detection optical splitter (7) to realize the output light collection, and the light that connection line of optic fibre will be gathered is input to spectral detection and control section by connector.Among Fig. 3 this part have a plurality of input optical interface connectors (301 ..., 302), be that expression realizes the spectral detection to a plurality of test points in the equipment, be applicable to the node processing of Device memory at a plurality of light directions.
Spectral detection controller (309) in the downstream node is connected with devices communicating/control bus (10) by I/O interface circuit (310).
Downstream node controller (604) carries out status information capture and control information dispensing to local device.Identical with the function of upstream relevant apparatus.Node Controller (604) is machine I/O interface circuit (603) as calculated, and is connected with user's main control computer (5) by cable (6).Note differently with Fig. 1 herein, user's main control computer (5) is positioned at downstream node.User application software in the computer provides spectrum control GUI, and by computer, the user can edit the target optical spectrum of spectral detection point, and can implement user intervention to upstream transmitting terminal intranodal Fader device by computer.When carrying out user intervention, the target optical spectrum behind the editor can be delivered to Node Controller (604) by Computer Communications Interface (603), and is kept in its inner memory.The user can issue an order by upstream nodes controller (404), realizes the definition and the configuration of amplifier working point, channel power regulated quantity in the upstream node, can also assign spectral detection and test point select command to place local node controller (604).Can also switch the mode of operation of channel power equalization, enter automatic service mode or user intervention pattern.Under the user intervention pattern, when having only the user to assign the channel power regulating command and arrive upstream node by control computer GUI, attenuator array is operation response; Under automatic service mode, downstream node controller (604) will periodically be gathered spectral detection information, and compare with target optical spectrum, in case spectral detection information deterioration, promptly by route and transponder the channel power spectrum is regulated request automatically and be sent to upstream node controller (404), start attenuator array and implement channel power control.
If with above Fig. 1-3 is different, main control computer is neither in upstream transmitting terminal node (claiming node 1), be not present in the node (claiming node 2) at target detection point place yet, but be positioned at the 3rd node (claiming node 3), then it all can send by the route and the transponder of its place intranodal control information of upstream transmitting terminal node and target detection node, gives the Node Controller of this intranodal after control information is received and unpacks by the route in the controlled node and transponder.Under the situation of this detected downstream, the 3rd ground master control, the user is after main control computer carries out spectrum editor, and new target spectrum will be through node 3 controllers, and node 3 routing forwarding devices send, received by node 2 routing forwarding devices, be kept at last in node 2 controllers.The user can issue an order to node 1 controller by routing forwarding at node 3, realize the definition and the configuration of amplifier working point, attenuator array working point in the node 1, can also assign spectral detection and test point select command to node 2 controllers by routing forwarding.Can also switch the mode of operation of channel power equalization, enter automatic service mode or user intervention pattern.Under the user intervention pattern, has only the user when node 3 is assigned channel power spectrum regulating command and arrived node 2 by control computer GUI, through node 2 carry out spectral scan and target spectrum relatively after, node 2 will send the channel power spectrum to node 1 by the routing forwarding device and regulate request, and attenuator array is operation response; Under automatic service mode, node 2 controllers will periodically be gathered spectral detection information, and compare with target optical spectrum, in case spectral detection information deterioration, promptly by route and transponder the channel power spectrum is regulated request automatically and be sent to node 1 controller, start attenuator array and implement channel power control.
Fig. 4 is the transmitting terminal composite wave appts structure chart with channel packet power equalization, as another embodiment that implements dynamic power control at transmitting terminal.
In Fig. 4, be grouped from the multipath light signal of optical sender and close ripple.Being without loss of generality, is example with two groups among the figure, and wherein 11 is a wave multiplexer, will from optical interface (101,102 ..., 103) multipath light signal close ripple, form one group of multiplexed signals; 13 is the another wave multiplexer, will from optical interface (104,105 ..., 106) multipath light signal close ripple, form another the group multiplexed signals (do not get rid of more groups of light signals are arranged).Optical splitter 111 is used for obtaining the output detection light of wave multiplexer 11, and optical splitter 113 is used for obtaining the output detection light of wave multiplexer 13.Each organizes light signal through after the attenuator array 120, is combined in the optical fiber by filter (or coupler) 151 again.Because 151 is to close ripple again with organizing multiplexing optical signal more, can be described as " composite wave device ".The 110th, to the optical splitter of total optical power detection, the 111st, total optical power output interface.131 and 133 is respectively the detector tube of two groups of light signals, forms the signal of telecommunication through opto-electronic conversion, pass through amplifying circuit (141,143) and AD conversion respectively after, the formation digital signal is input in the controller.
In this structure, be to be that target is regulated with each group multiplex section signal, be the power equalization of realizing between two groups of multiplex section signals, and do not comprise the power equalization between inner each optical channel of each group multiplex section signal.Can in every group, in fact optical channel quantity be arranged, carry out equilibrium in proportion.
Fig. 5 is that the beam split of receiving terminal channel-splitting filter detects channel power, channel equalization structure chart, as another embodiment that implements dynamic power control at optical transceiver.
Optical transceiver can have the channel power equalization function at receiving terminal, can implement receive each channel power in this locality and detect, and can implement editor and control to transmission spectrum at local node.What provide among Fig. 5 is the hardware part of single directional light transmission in the terminal.If the wavelength-division-multiplexed optical signal that oriented other directions receive in the optical transceiver, then the channel power equalization device of other transmission directions is identical with part described in the figure.
In optical transceiver, the multiplexing optical signal from transmission line is arranged, after these light signals need be amplified to suitable performance number, enter receiver through behind the partial wave.Hardware unit in optical transceiver comprises following part: channel-splitting filter, attenuator array and controller part (100-164) thereof, amplifier and controller part (200-264) thereof, intranodal devices communicating and control bus (3), Node Controller and communication interface (401 thereof, 402,403,404), user's main control computer (5) and stube cable (6) etc.More than each part be connected to each other by optical interface connector and devices communicating bus interface, separable physically.
Each part hardware configuration is identical with Fig. 1 among Fig. 5.Be different with Fig. 1, because torrent of light is to difference, the 150th, use as channel-splitting filter.Optical signals optical interface connector (201) input from a plurality of optical convering units of multiplexed signals of transmission line, image intensifer input light detects optical splitter (202), reception amplifier, amplifier output detects optical splitter (203), optical interface connector (200,100), channel-splitting filter input light detects optical splitter (110), channel-splitting filter (150), light attenuator array (120) detects optical splitter (111,112 through output, ..., 113), respectively by optical interface connector (101,102, ..., 103) output.The light of output enters the optical receiver (optical receiver is not included among Fig. 5) of each passage respectively.Constitute unidirectional light-receiving path with top.
Because torrent of light is to different with Fig. 1, the meaning of detection signal and Fig. 1 be difference mutually.From the output of each passage detect optical splitter (111,112 ..., 113) detected be the luminous power that enters receiver.Channel power equalization controller (162) can be controlled attenuator array (120), makes each optical channel obtain suitable decay.Channel power equalization controller (162) also is connected with devices communicating/control bus (3) by I/O interface circuit (163).From optical splitter 202,203 can detect image intensifer input, Output optical power value, amplifier controller (262) can computing amplifier yield value, current gain value and the yield value (being Configuration Values) that expectation reaches can also be compared, when variant, control amplifier be changed current yield value up to conforming to Configuration Values.Amplifier controller (262) also is connected with devices communicating/control bus (3).
Node Controller (404), the same devices communicating/control bus of I/O interface circuit (3), interface connecting line (401), equipment I/O interface circuit (402), peripheral hardware Computer I/O interface circuit (403), cable (6), computer same Fig. 1 of function such as (5).Different with Fig. 1 is not need spectroscopic detector here.Node Controller will periodically obtain the spectral detection data from the channel power equalization controller, through be stored in its inner passage target light power and compare, in case optical channel distribute power deterioration promptly starts attenuator array and image intensifer automatically and implements channel power spectrum control (satisfying two constraintss mentioned above).
Fig. 6 is that the beam split of receiving terminal channel-splitting filter detects channel power, grouping equalizing structure figure, as another embodiment that implements dynamic power control at optical transceiver.
In Fig. 6, be grouped from the multiplexed signals of transmission line and carry out partial wave.The 111st, the total optical power input interface, the 110th, to the optical splitter of total optical power detection.Group channel-splitting filter (151) will be divided into many groups from the light signal of optical interface 110.Be without loss of generality, in 2 groups be example, wherein 11 is a channel-splitting filter, will be from one group of multiplexing optical signal partial wave of component ripple device (151), through optical interface (101,102 ..., 103) output; 13 is the another channel-splitting filter, organizes in the future another group multiplexing optical signal partial wave of channel-splitting filter (151) from the beginning, through the light optical interface (104,105 ..., 106) output.Not getting rid of has more groups of light signals from 151 outputs of group channel-splitting filter.Optical splitter 111 is used for obtaining the input detection light of channel-splitting filter 11, and optical splitter 113 is used for obtaining the input detection light of wave multiplexer 13.Each organizes light signal through after the attenuator array 120, enters each channel-splitting filter more respectively.131 and 133 is respectively the detector tube of 2 groups of light signals, forms the signal of telecommunication through opto-electronic conversion, pass through amplifying circuit (141,143) and AD conversion respectively after, the formation digital signal is input in the controller.
In this structure, be to be that target is regulated with each group multiplex section signal, be the power equalization of realizing between two groups of multiplex section signals, and do not comprise the power equalization between inner each optical channel of each group multiplex section signal.Can in every group, in fact optical channel quantity be arranged, carry out equilibrium in proportion.
Among the embodiment of Fig. 4, Fig. 5, Fig. 6, if main control computer in the strange land, then forms the embodiment of strange land master control.
Two, operational data and data relationship
Described gain of this section and Insertion Loss value are all with its absolute value representation, and unit is dB.
With embodiment illustrated in fig. 1 is example,
Each passage of the channel power equalization device (120) that is made of the voltage-controlled attenuator array inserts loss and can be expressed as:
l W([λ C1, λ C2..., λ CN])=[l W1, l W2..., l WN] (formula 1)
L wherein WN (n=1,2 ..., N) being illustrated in channel center's wavelength is λ CN (n=1,2 ..., the pad value of N) locating, N are controllable optical channel quantity, realize that promptly the attenuator array effective wavelength working range of channel power equalization is (λ C1, λ CN).Can independently control because of every passage inserts loss, it is relevant with wavelength therefore to insert loss, formation " effective attenuation spectrum ".
At instantaneous quarter, the optical channel of real work can be less than N, is called " optical channel is arranged in fact ".These real decay that have passage to realize are constituted " the channel attenuation spectrum is arranged in fact ".Have channel attenuation spectrum data to be expressed as in fact:
L ([λ 1, λ 2..., λ M])=[l 1, l 2..., l M] (formula 2)
L wherein m(m=1,2 ..., M) be illustrated in the real optical channel central wavelength lambda that has m(λ C1＜λ m＜λ CN, m=1,2 ..., the pad value of M) locating (dB), M are the real quantity that optical channel is arranged.
Can unify to be expressed as in the overall gain of each channel signal luminous power of transmitting terminal:
G WN=G (λ CN)-l WN-M (λ CN) (formula 3)
G wherein WN is that n optical channel folk prescription is to overall gain; G is the gain of image intensifer (210), and is general relevant with wavelength; l WN is the insertion loss of attenuator array to n optical channel; M is the insertion loss of wave multiplexer.
P WN=G WN+Potu n (formula 4)
P WN is the launched power that passage n is ordered at A, and Potu n is the power that passage n optical convering unit outputs to attenuator.
The channel attenuation amount that input power is implemented is regulated change passage power output distribution, can change the passage incident optical power, may cause the drift of amplifier out launched power point.Cause spectrum to go up, lose for fear of the drift of amplifier out launched power point, need under dynamic behavior, guarantee:
| D = 10 lg&Sigma; 10 P W n / 10 - P 0 - 10 lgM | < &Delta; (formula 5)
P wherein 0Be amplifier single channel average output power, show the quiescent point of optical transceiver.△ is skew control thresholding.∑ 10 PWn/10Can detect by the amplifier out luminous power and obtain.M is the real optical channel quantity that has, and can import the light detection by attenuator array and obtain.
When formula 5 did not satisfy, quiescent point had taken place and has been offset out-of-limit phenomenon in optical transceiver, needed optical transceiver to implement to regulate automatically, and this process is called " quiescent point locking " control.
When implementing the quiescent point locking, need make the gain/attenuation value of all optical channels unify to adjust.Consideration formula 4, formula 5 are desirable
G WN ← G WN-D (formula 6)
Notice that D both can be greater than 0, also can be less than 0.
Consideration formula 2 is desirable
l WN ← l WN+D 1, (formula 7.1)
And G (λ CN) ← G (λ CN)-D 2(formula 7.2)
D=D wherein 1+ D 2(formula 7.3)
Need to satisfy
Lmin＜l WN＜lmax, Gmin＜G＜Gmax (formula 8)
When surpassing this restriction, optical transceiver should have the output of alarm flag information; Controller should be redistributed D 1And D 2
When equipment is started working at first, each channel attenuation device be should preset and loss and amplifier gain value inserted, be designated as G 0And l Wn 0, be kept in the controller built-in storage with the default configuration data mode.
When carrying out the quiescent point adjusting, establishing target is regulated spectrum (relative value) and is:
δ l=[δ l 1, δ l 2..., δ l M]=[D 1, D 1..., D 1] (formula 9)
There is not under the situation of amplifier G (λ in modus ponens 6 and the formula 7 CN)=0, D 2=0.
At test point, can detected reality have the channel power stave to be shown:
P ([λ 1, λ 2..., λ M])=[p 1, p 2..., p M] (formula 10)
As the controlled target point, have passage target stave to be shown in fact test point:
p T([λ 1, λ 2..., λ M])=[p T1, p T2..., p TM] (formula 11)
The channel power spectrum is arranged in fact and has the difference between the passage target spectrum to show as spectrum shape difference and static power difference in fact:
Spectrum shape difference is defined as the poor of two luminous powers spectrum:
δ p=p T-p (formula 12)
It is poor that static power difference is defined as two power spectrum average powers:
δ P=MEAN (p T)-MEAN (p) (formula 13)
Wherein MEAN () is a mean value function.
Regulate for carrying out spectrum, establishing target is regulated spectrum (relative value) and is:
δ l=p T-p+ δ P promptly
[δ l 1, δ l 2..., δ l M]=[p T1, p T2..., p TM]-[p 1, p 2..., p M]+δ P (formula 14)
Having got rid of static power difference as much as possible in target adjusting spectrum, is for fear of occurring too much quiescent point calibration reactions at optical transceiver, causing the spectrum shake.
Dynamic adjustments does not contain test point static power difference regulates, because utilize upstream optical transceiver power adjustments to realize that the AUTOMATIC STATIC power control of test point is not only nonsensical, and easily causes in the dynamic process spectrum to go up at random or loses.
Whether drive optical transceiver and carry out channel power control, depend on the difference between two spectrum.Definition spectrum shape difference norm || p, p T//, controlled target requires it less than δ, and δ is spectrum shape similitude constraints.
The quiescent conditions of optical transceiver dynamic channel power control is:
|| p, p T//＜δ (formula 15)
A kind of available norm function is defined as: || p, p T//=MEAN/ δ l/ does not get rid of and uses other forms of construction of function.
So that channel attenuation spectrum data to be arranged in fact is target, and utilization effective attenuation spectrum control data is implemented to control to the channel power equalization device.In order to adapt to real have optical channel quantity and center wavelength variation, when implementing control, need there be the channel attenuation target data to obtain the effective attenuation spectrum control data that the needs equalizer is realized according to real by curve fit.
δl Cn＝Interp(λ 1，λ 2，...，λ M，δl 1，δl 2，...，δl M，λ Cn)
(formula 16)
Interp () expression iunction for curve in the following formula is for example used linear fit, mode such as spline function match repeatedly.Curve fit has guaranteed have the target of optical channel central wavelength to decay real; And with controlled attenuation device array in number of attenuators coupling, avoid the control data disappearance; And prediction and realized the real decay that has optical channel to change the emerging optical channel central wavelength in back.
When implementing control, the equalizer controller will be regulated the spectrum increment by supplementary target on former control data, promptly
l Cn← l Cn+ δ l Cn(formula 17)
Drive equalizer according to new control data immediately.
Because of limited by the attenuator respond, its balance the possibility of result and target there are differences, therefore need iteration control, after promptly once balanced control realizes, detect the real channel power spectrum that has once more at impact point, more new-type 10 data, and, drive equalizer once more according to the new control data of formula 12-17 acquisition.Can implement repeatedly iteration, up to the requirement of satisfying formula 15.
Formula 5 and formula 15 constitute the quiescent point constraint and the constraint of spectrum shape similar figures of optical transceiver respectively.Be following two the important restrictions conditions of system dynamics controlled condition.
Under the constraint of formula 5 and formula 15 control, can realize each optical channel dynamic equalization of optical transceiver, and the drift of the static point in the dynamic adjustments process is under an embargo, unless the user resets quiescent point.
Embody the ability to work of amplifier and attenuator, formula 8 constitutes the working field of dynamic adjustments.
The described basic skills of this section, its core concept also is applicable to the embodiment of Fig. 2-6.
Three, devices communicating
At each intranodal, carry out the information transmission by Equipment Control bus (for example among Fig. 1 3) between the controller of each functional unit (for example among Fig. 1 162,262,309) and this node interior nodes controller (as among Fig. 1 404).Provide communication message embodiment below.Message format is:
{ heading, purpose (source) address, message length, text }
Wherein communication interface standard is relevant between heading and each controller, is generally the binary code of set form, is used for realizing that message discerns synchronously; Purpose (source) address is to be used for indicating controller that receives message or the controller that sends message; Byte location when message length can show whole ENMES; Text comprises alarm, performance or control information, and all information can realize with binary code in physical layer, show at application layer available characters string list.
Be the controlled function that realizes that this specification will reach, follow above-mentioned message format, have following necessary message:
Message 1: report the message of amplifier operating state, send to intra-node communication/control bus by amplifier controller:
{ heading, source address, message length, state symbol, amplifier quantity of state }
Body part comprises state symbol in the message, the amplifier quantity of state.Wherein the amplifier state symbol is used for indicating the attribute of quantity of state, for example amplifier gain, input, power output etc.
Message 2: carry out the message of amplifier gain configuration change, send to intra-node communication/control bus by Node Controller:
{ heading, destination address, message length, controlled amplifier port numbers, amplifier gain }
Message 3: carry out the message of optical transceiver quiescent point change, send to intra-node communication/control bus by Node Controller:
{ heading, destination address, message length, command character, quiescent point Configuration Values }
Message 4: report the message of attenuator array state of a control and warning information, send to intra-node communication/control bus by the channel power equalization controller:
{ heading, source address, message length, alarm or state information }
Wherein alarm or state information comprise:
The channel power spectrum was regulated the limit alarm; The backward channel power spectrum regulates successfully/failure flags etc.
Message 5: carry out the message of attenuator array decay spectra change, send to intra-node communication/control bus by Node Controller:
Heading, and destination address, message length, command character, wavelength value 1, pad value 1 ..., wavelength value N, pad value N}
Message 6: report the message of spectral detection point spectrum state (or each channel power value of receiving terminal), send to intra-node communication/control bus by the spectral detection controller:
Heading, and source address, message length, state symbol, wavelength value 1, performance number 1 ..., wavelength value N, performance number N}
Message 7: carry out the message of spectral detection control, send to intra-node communication/control bus by Node Controller:
{ heading, destination address, message length, command character }
Command character comprises: spectroscopic detector mode of operation change order (autosensing mode, or controlled detection pattern); The spectral detection starting command; Set spectral detection point etc.
Node Controller full detail in the command message that bus sends can customize the GUI in main control computer, and the user can be issued to control command the Node Controller of controlled node by computer.The control command of assigning is gone back the additional node address except that the content that comprises above message format regulation.
Main control computer to the control command form that Node Controller sends is:
Message 8:
The main controlled node address, and the controlled node address, following/last line flag, command message }
When main control computer is positioned at this locality, control information will be delivered to Node Controller by the Computer I that is connected with Node Controller/O interface, be identified as the control information of this node after Node Controller takes orders, then command message delivered to the devices communicating/control bus of this node according to the message format of above explanation.When controlled node and main control computer place node not simultaneously, main control computer place Node Controller is identified as the control information that sends to the strange land node after receiving order, then this information is delivered to the routing forwarding device, according to routing table information is delivered to destination node place direction by the routing forwarding device.After the routing forwarding device of controlled node receives control information, be identified as the control information of this node, then control information passed to Node Controller.After taking orders, Node Controller then command message is delivered to the devices communicating/control bus of this node according to the message format of above explanation.
When informational needs was delivered to main control computer, the infomational message form was still with message 8.Node Controller will be selected outbound course according to the main control computer position.When main control computer is positioned at local node, Node Controller will report to main control computer with information by being attached thereto the Computer I/O interface that connects, and the GUI of main control computer can do visualization processing with the information that reports, so that the user observes.When main control computer was positioned at other nodes, Node Controller was given information and is attached thereto route and the transponder that connects.Route and transponder send to this node place direction after information is added main control computer place node address.After the routing forwarding device of main control computer place node receives information, be identified as reporting information, then information passed to the Node Controller of this node, deliver to main control computer through the Computer I/O interface that is connected with Node Controller then to this node.
The user control operation relevant with above function at main control computer GUI comprises following several:
Target optical spectrum editor and spectrum issue;
Mode initialization (automatic service mode, user's interference pattern);
Under user's interference pattern, start-up control.
Other auxiliary user's control operations comprise following several:
The spectrum inquiry;
The change of spectral detection point;
Spectroscopic detector mode of operation change (autosensing mode, controlled detection pattern);
The change of amplifier gain Configuration Values;
The change of optical transceiver quiescent point.
On transmitting between the routing forwarding device/during downlink data, need will send after packing data that transmit or the framing.Packets of information is generally CHAR, comprises head of packet sign, packets of information tail tag will.Information with identical destination node address, the same packets of information of can packing into.Packet format is:
Message 9:
The head of packet sign, and the main controlled node sign, the controlled node sign, on/following line flag, message full text, byte of padding, packets of information tail tag will }
Four, software flow
Each functional unit of each node and intra-node cooperates to be finished.
Each unit internal controller and Node Controller embedded operation software workflow embodiment are as follows:
Optical transceiver channel power equalization controller software workflow (see figure 7):
Step 7-1: start or system reset;
Step 7-2: introduce executable program in start or system reset situation lower channel power controller from its inner program storage, and the default configuration data, comprise default static working point data, and spectrum control data λ Cn, l Wn 0
Step 7-3: carry out the attenuator array input optical power and detect, but in order to determine current service aisle.
Step 7-4: operating state judges, if system newly starts shooting/reset, or the input of controller I/O interface has the channel power regulating command, then enters step 7-5, otherwise enters step 7-8;
Step 7-5:, then use default control data λ if system newly starts shooting, resets Cn, l Wn 0If the adjusting command of channel power spectrum is arranged, then adopt [the δ l of biography under the command stack 1, δ l 2..., δ l M], carry out curve fitting (formula 16) obtains control spectrum incremental data;
Step 7-6: by the equalizer control interface, use step 7-5, reach formula 17 gained data drive control devices;
Step 7-7: after the operation of adjustable attenuator array response, controller sends to bus and controls successfully sign.If the super attenuator device of control data adjustable range (formula 8) is then returned failure flags, also can be used as warning information;
Step 7-8:, when being empty, do not have the message of reception as if Query Result to inquiring about of controller with the interface related order storehouse of I/O.Then enter step 7-3, implement cycle performance and detect.If when the message of reception is arranged, enter step 7-10;
Step 7-9: carry out message and handle, controller carries out device talk by the I/O interface.If the order storehouse has querying command, then report (message 3) by search request; If the order storehouse has attenuator array decay spectra change order (message 5), then revise local configuration data l CnTo step 7-3.
Optical transceiver amplifier controller software workflow (see Fig. 8, be applicable to the embodiment of Fig. 1-4):
Step 8-1: start or system reset;
Step 8-2: amplifier controller is introduced executable program from its inner program storage under start or system reset situation, and default configuration data G 0
Step 8-3: carry out amplifier input, Output optical power detection, and computing amplifier work at present gain.
Step 8-4: operating state judges, if system newly starts shooting/reset, or the input of controller I/O interface has the gain-adjusted instruction, then enters step 8-5, otherwise enters step 8-7;
Step 8-5:, then use default control data G if system newly starts shooting, resets 0If the gain-adjusted order is arranged, then adopt the gain Configuration Values of biography under the command stack, driving amplifier obtains to specify gain;
Step 8-6: after the gain-adjusted, carry out the amplifier state and report (message 1);
Step 8-7:, when being empty, do not have the message of reception as if Query Result to inquiring about of controller with the interface related order storehouse of I/O.Then enter step 8-3, implement cycle performance and detect.If when the message of reception is arranged, enter step 8-8;
Step 8-8: carry out message and handle, controller carries out device talk by the I/O interface.If the order storehouse has querying command, then report (message 1) by search request; If the order storehouse has amplifier gain change order (message 2), then revise local configuration data G.To step 8-3.
Spectral detection controller workflow (see Fig. 9, be applicable to the embodiment of Fig. 1-4):
Step 9-1: system newly starts shooting/resets;
Step 9-2: introduce default configuration data, comprise spectral detection mode of operation sign, scan light Directional Sign etc.;
Step 9-3: judge this machine mode of operation, if under autosensing mode, or command stack has the spectra collection order, then enters step 9-4, otherwise enters step 9-9;
Step 9-4: according to scan light Directional Sign, driven optical switch;
Step 9-5: start spectroscopic detector, obtain scanning result through its control interface.Scanning result has channel power to compose for real, is expressed as: [λ 1, λ 2..., λ M], [p 1, p 2..., p M];
Step 9-6: carry out storage, in order to inquiry;
Step 9-7: data are sent to devices communicating/control bus by controller I/O interface;
Step 9-9:, when being empty, do not have the message of reception as if Query Result to inquiring about of controller with the interface related order storehouse of I/O.Then enter step 9-3, implement cycle criterion.If when the message of reception is arranged, enter step 9-10;
Step 9-10: carry out message and handle, controller carries out device talk by the I/O interface.If the order storehouse has the spectrum querying command, then report (message 6) by search request; If the order storehouse has more this order new (message 7) of spectral detection state, then revise local configuration data.
Node Controller will be worked in such a way, to realize Real-time and Dynamic Detection and spectrum optimization.Can there be two kinds of mode of operations in control method to the equilibrium point: automatic service mode and user's interference pattern.
Automatically service mode is exactly that the target spectrum is present in the Node Controller of test point, and Node Controller is periodically inquired about the spectral detection data, and compares with the target spectrum.In case difference surpasses regulation norm thresholding (formula 15), then target spectrum and current detection spectrum subtraction being obtained need be in the adjusting spectrum (formula 14) of channel power equalization node realization.The test point Node Controller will send to the optical transceiver node to the decay spectra information and the request of regulating by the routing forwarding device, go again after acquisition is regulated and successfully indicated and inquire about spectrum, if difference still above regulation norm thresholding, then obtains target spectrum and current detection spectrum subtraction once more and need compose in the adjusting that the optical transceiver node is realized.The test point Node Controller will send to the optical transceiver node to the new adjusting spectrum information and the request of regulating by the routing forwarding device, implement secondary automatically and regulate.
User's interference pattern is issued to test point place Node Controller after by main control computer impact point spectrum being edited exactly, and starts adjusting.
Figure 10 has provided the workflow (be applicable to the embodiment of Fig. 1-2) of Node Controller under automatic service mode.
Step 10-1: in-process in major cycle, function software periodically carries out this step, according to configuration sign differentiation state, permits if be in automatic maintenance function, then enters step 10-2, otherwise enters step 10-8, and continue the major cycle process;
Step 10-2: assign spectra collection order (message 7) to the spectral detection controller;
Step 10-3: wait for the spectra collection result, treat that operation is finished after, obtain the real passage scanning optical spectrum data (message 6) that have from devices communicating/control bus;
Step 10-4: current detection spectrum and target spectrum are compared check spectral similarity (according to formula 15).If satisfy the similitude requirement, then this process finishes, and enters step 10-8, promptly continues the major cycle process.If do not satisfy the similitude requirement, then need to implement the balanced control of optical channel, enter step 10-5;
Step 10-5: if spectral detection point output in optical transceiver, Node Controller is assigned spectrum adjusting command (message 5) to the channel-equalization controller, wherein comprises the real passage target adjusting spectrum data [λ that has 1, λ 2..., λ M], [δ l 1, δ l 2..., δ l M]; If spectral detection is at another node of optical transceiver downstream, then this Node Controller will send to upstream relative photo terminal Node Controller (message 9) to the spectrum adjusting command through the route transponder, deliver to the channel power equalization controller by communication bus in the optical transceiver again.
Step 10-6: wait for that the channel-equalization controller returns executing state (message 3), if spectral detection point output in optical transceiver obtains to judge behind the uploaded state from devices communicating/control bus; If spectral detection is at another node of optical transceiver downstream, then optical transceiver sends to state information the Node Controller (message 9) of detected downstream node through the route transponder.If carry out failure, then enter step 10-7.If run succeeded, then enter step 10-9.Entering step 10-2 is in order to realize iteration control;
Step 10-7: if main control computer reports by Computer I/O interface in this locality, if main control computer in the strange land, is delivered to the routing forwarding device with information;
Step 10-8: attended operation is finished automatically, continues the major cycle process.
Step 10-9: quiescent point is judged, is successfully entered step 10-3.Entering step 10-3 is in order to realize iteration control; Otherwise enter step 10-10;
Step 10-10: send config update order (formula 6-7), message 5, message 2 to channel power equalization controller and amplifier controller;
Step 10-11: accepting state reporting information, message 1, message 4.Failure enters step 10-7, successfully enters step 10-2.Entering step 10-2 is in order to realize iteration control;
Above step 10-9,10-10,10-11 implements at optical transceiver place node.If spectral detection at another node of optical transceiver downstream, then sends to state information the Node Controller (message 9) of detected downstream node through the route transponder at step 10-11 optical transceiver.
Figure 11 has provided the Node Controller workflow embodiment under user's interference pattern.Under any circumstance, Node Controller can receive the forced adjustment order of main control computer, starts spectrum and regulates.Therefore present embodiment provides the interrupt response mode.
Step 11-1: at local node, the Computer I that links to each other with Node Controller/O interface is imported the control command of main control computer as if main control computer, and sends interrupt requests to the CPU of Node Controller; If main control computer is in the strange land, then the routing forwarding device is received control information after unpack the acquisition order, and sends interrupt requests to the CPU of Node Controller.The Node Controller response is interrupted, and enters step 11-2;
Step 11-2: the Node Controller response is interrupted, and judges interrupt requests.If the channel power equalization adjusting command then enters step 11-3, otherwise carries out other processes according to interrupt requests character;
Step 11-3: assign spectra collection order (message 7) to the spectral detection controller;
Step 11-4: wait for the spectra collection result, treat that operation is finished after, obtain the real passage scanning optical spectrum data (message 6) that have from devices communicating/control bus;
Step 11-5: current detection spectrum and target spectrum are compared check spectral similarity (according to formula 15).If satisfy the similitude requirement, then this process finishes, and enters step 11-11, if do not satisfy the similitude requirement, then needs to implement the balanced control of optical channel, enters step 11-6;
Step 11-6: at the same node of optical transceiver, Node Controller is assigned spectrum adjusting command (message 5) to the channel power equalization controller as if spectral detection, wherein comprises the real passage target adjusting spectrum data [λ that has 1, λ 2..., λ M], [δ l 1, δ l 2..., δ l M]; If spectral detection is at another node of optical transceiver downstream, then this Node Controller will send to upstream relative photo terminal Node Controller (message 9) to the spectrum adjusting command through the route transponder, deliver to the channel power equalization controller by communication bus in the optical transceiver again.
Step 11-7: wait for that the channel-equalization controller returns executing state (message 3), if spectral detection point output in optical transceiver obtains to judge behind the uploaded state from devices communicating/control bus; If spectral detection is at another node of optical transceiver downstream, then optical transceiver sends to state information the Node Controller (message 9) of detected downstream node through the route transponder.If carry out failure, then enter step 11-13.If run succeeded, then enter step 8;
Step 11-8: quiescent point is judged, is successfully entered step 11-3.Entering step 11-3 is in order to realize iteration control; Otherwise enter step 11-9;
Step 11-9: send config update order, message 5, message 2 to channel power equalization controller and amplifier controller.(formula 6-7)
Step 11-10: accepting state reporting information, message 1, message 4.Failure enters step 11-15, successfully enters step 11-3.Entering step 11-3 is in order to realize iteration control;
Above step 11-8,11-9,11-10 implements at optical transceiver place node.If spectral detection at another node of optical transceiver downstream, then sends to state information the Node Controller (message 9) of detected downstream node through the route transponder at step 11-10 optical transceiver;
Step 11-11: when spectrum satisfies the similitude requirement, finish adjusting.Report current state from Computer I/O interface or routing forwarding device to main control computer.Enter step 12;
Step 11-12: interrupt response finishes, the major cycle process of return node controller;
Step 11-13: when the channel power equalization device is regulated failure, stop regulating.Report current state from Computer I/O interface or routing forwarding device to main control computer.Enter step 14
Step 11-14: interrupt response finishes, the major cycle process of return node controller;
Step 11-15: when channel power equalization device or amplifier adjusting failure, stop regulating.Report current state from Computer I/O interface or routing forwarding device to main control computer.Enter step 16
Step 11-16: interrupt response finishes, the major cycle process of return node controller.

Claims (18)

1 one kinds of channel power dynamic equalization control device of realizing the optical-fiber network optical transceiver comprise by closing (branch) wave energy structure, optical transmission pathway that image intensifer constituted, it is characterized in that this device also comprises:
Close in wave energy structure and/or the receiving terminal partial wave functional structure at the optical transceiver transmitting terminal, the attenuator array that is made of the power adjustments attenuator be set,
Amplifier controller obtains current gain, the optical transceiver performance number at multiplex section according to the light testing result, changes the amplifier drive current when change in gain, carries out gain locking through amplifier application interface pair amplifier; When this performance number departs from nominal operation point, change control data, regulate through amplifier control interface pair amplifier average gain,
The channel power balance controller obtains the performance number of optical transceiver at multiplex section according to the light testing result, and changes control data when performance number departs from nominal operation point, through the attenuator array control interface each channel attenuation amount of attenuator array is regulated,
The spectral detection controller, the control interface that connects by communication/control line is respectively applied for: starts or closes spectroscopic detector, accepts the scan-data that after spectral detection, obtains, the port of switches light switch,
Node Controller, storing detected reality has the target power spectrum of passage, after the reality that obtains spectral detection has the channel power spectrum, carrying out spectral similarity judges, there are channel power spectrum and target power spectrum to differ greatly in fact, after surpassing similitude constraints, then send the optical channel power adjustment commands to optical transceiver
Test point in the input of closing wave energy structure, amplifier, partial wave functional structure, output setting detects luminous power respectively, is converted to amplifier controller or channel power equalization controller through Photoelectric Detection and A/D,
The spectral detection point that is provided with at local node or downstream node inserts spectroscopic detector, through the control interface of communication/control line connection to the spectral detection controller,
Described amplifier controller, channel power equalization device controller link to each other with devices communicating/control bus by the I/O interface, the work at present state is reported to the Node Controller that links to each other with devices communicating/control bus, orders such as the gain configuration change that slave unit communication/control bus acquisition Node Controller issues, the change of optical transceiver quiescent point, attenuator array passages regulate
Described spectral detection controller links to each other with devices communicating/control bus by equipment I/O interface, can implement spectral scan by the receiving node controller, also spectroscopic data can be reported,
Between node, the information that described Node Controller sends realizes transmitting by route and transponder.
2 realize the channel power dynamic equalization control device of optical-fiber network optical transceiver according to claim 1, it is characterized in that this device further comprises:
Input optical interface connector is used to import a plurality of independently optical passage signals;
The optical convering unit array, comprise a plurality of light/electricity/light conversion, be used for input optical signal is converted to the light signal that meets the requirement of wave multiplexer input optical wavelength, each road light/electricity wherein/light conversion all comprises a laser, laser is subjected to the control of laser control detection device, and performance informations such as its Output optical power detected value are fed back to laser control detection device, laser control detection device can be known the optical power value of each optical channel;
Laser control detection device is connected with devices communicating/control bus by the I/O interface circuit, input, the output light state information of each optical channel is delivered to bus, from the control information of bus received optical power.
3 realize the channel power dynamic equalization control device of optical-fiber network optical transceiver according to claim 1, it is characterized in that:
Input, output that image intensifer two ends optical splitter is told detect light, carry out forming detection signal (signal of telecommunication) after the opto-electronic conversion through the Photoelectric Detection pipe respectively, after amplifying through the detection signal amplifier respectively again, carry out forming data-signal process communication/control line to amplifier controller after the digital-to-analogue conversion through the AD/DA change-over circuit;
According to this data-signal, amplifier controller calculates each Amplifier Gain value, amplifier controller is compared current gain value and the yield value (being Configuration Values) that expectation reaches, and will control each amplifier and change current yield value up to conforming to Configuration Values when variant;
In the time will changing Amplifier Gain, amplifier controller will be exported driving data, be input to the AD/DA change-over circuit through communication/control line, driving data forms Control current through after the digital-to-analogue conversion, is input to the amplifier control interface after suitably amplifying through the drive current amplifying circuit again;
Amplifier controller is connected with devices communicating/control bus by the I/O interface circuit, and amplifier gain state of value information is delivered to bus; From bus receiving gain Configuration Values and gain controlling information.
4 realize the channel power dynamic equalization control device of optical-fiber network optical transceiver according to claim 1, it is characterized in that:
To carry out respectively forming the detection electric current after the opto-electronic conversion through the Photoelectric Detection pipe respectively from the light of attenuator array one end optical splitter output, realize being amplified into the AD/DA change-over circuit through amplifying circuit respectively again, the data-signal that obtains after the process analog-to-digital conversion is through the controller of communication/control line admission passage power equalizer, by control interface connecting line control attenuator array, make each optical channel obtain suitable decay;
Controller calculates the current insertion loss of equalizer according to the current detection result, and controller will make the average insertion loss of equalizer keep stable by control interface connecting line control equalizer when the insertion loss is bigger than normal or less than normal;
The channel power equalization controller is connected with devices communicating/control bus by the I/O interface circuit, and attenuator array state of a control and warning information etc. are sent to bus; Take in capable attenuator array decay spectra changed information from bus interface.
5 realize the channel power dynamic equalization control device of optical-fiber network optical transceiver according to claim 1, it is characterized in that:
Realize the output light collection by the optical splitter of image intensifer output, the light that will be gathered by connection line of optic fibre inputs to spectroscopic detector and spectral detection controller by interface connector;
A plurality of input optical interface connectors can be arranged,, be applicable to the processing node of Device memory at a plurality of light directions to realize spectral detection to a plurality of spectral detection points;
Can select an optical switch to realize the switching of each spectral detection point by multichannel;
Spectroscopic detector is a spectrometer, or a channel power detector;
The spectral detection controller is connected with devices communicating/control bus by the I/O interface circuit, and by output signal line, the spectral detection controller can output to bus with spectroscopic data; By input signal cable, the spectral detection controller can receive spectral detection from bus and start/cease and desist order and the test point select command.
6 channel power dynamic equalization control device as realization optical-fiber network optical transceiver as described in the claim 5, it is characterized in that: described channel power detector, under the management of spectral detection controller, can carry out the channel spectrum test to spectral detection point automatically more than 1; Or externally the spectrum test of specifying spectral detection point is down controlled in order.
7 realize the channel power dynamic equalization control device of optical-fiber network optical transceiver according to claim 1, it is characterized in that:
Described Node Controller is used for local device is carried out status information capture and control information dispensing;
The collection of Node Controller and control comprise related information on the optical transmission direction, also comprise information related on other optical transmission direction, comprise automatic maintenance and user's interference pattern;
Node Controller is connected by the same devices communicating/control bus of I/O interface circuit, pass through input signal cable, can obtain all job informations of being connected with bus, comprise the current gain of amplifier, current average Insertion Loss of balanced control phase, spectral detection are put current scan-data etc.; By output signal line, can adjust order, attenuator array quiescent point adjustment order, the adjusting command of channel power spectrum, spectral detection order etc. to the gain of bus output amplifier;
Node Controller is by Computer I/O interface circuit, be connected with computer by cable, user application software in the computer provides spectrum control GUI, pass through computer, by the user target optical spectrum of spectral detection point is edited, and intranodal channel power equalization device is implemented user intervention by computer.
The 8 channel power dynamic equalization control device as realization optical-fiber network optical transceiver as described in the claim 7 is characterized in that:
The user intervention pattern of described Node Controller, after by main control computer impact point spectrum being edited, the target optical spectrum behind the editor can be delivered to Node Controller by Computer Communications Interface, is stored in the memory in the controller, and starts and regulate;
Issue an order to Node Controller by the user, realize definition and configuration intranodal amplifier working point, attenuator array working point, spectral detection point;
By the user mode of operation of channel power equalization is switched;
When having only the user to assign the regulating command of channel power spectrum by control computer GUI, Node Controller just drives the control that each controller is implemented the channel power spectrum.
9 channel power dynamic equalization control device as realization optical-fiber network optical transceiver as described in the claim 7, it is characterized in that: the automatic service mode of described Node Controller, Node Controller will periodically be gathered spectral detection information, the target power spectrum is stored in the Node Controller of spectral detection point, Node Controller is periodically inquired about the spectral detection data, and compare with target power spectrum, in case spectral detection information deterioration promptly starts attenuator array and image intensifer automatically and implements the control of channel power spectrum.
10 channel power dynamic equalization control device as realization optical-fiber network optical transceiver as described in the claim 7, it is characterized in that Node Controller is under automatic maintenance and user's interference pattern, in case difference surpassed certain norm thresholding when spectral detection data and target power were composed relatively, then integration objective spectrum and current detection spectrum obtain and need regulate the spectrum spectrum in the target of optical transceiver transmitting terminal realization;
If the spectral detection point is positioned at the output of optical transceiver, promptly be controlled at same node with channel-equalization, then the Node Controller in the optical transceiver sends to channel power equalization device controller to the adjusting spectrum information and the request of regulating by devices communicating/control bus;
If spectral detection point is at other node of the downstream of channel-equalization Control Node, the Node Controller of spectral detection point will be regulated the channel power relative different regulating spectrum information and regulating and ask to be sent to the upstream optical transceiver with channel power equalization ability by the routing forwarding device behind the channel power equalization device controller response command;
Regulate channel power behind the channel power equalization device controller response command, row inquiry spectrum still surpasses regulation norm thresholding as if difference again, and then once more target spectrum and current detection spectrum subtraction being obtained need be in the adjusting spectrum of channel power equalization node realization;
Spectral detection point Node Controller will send to the channel power equalization node to the new adjusting spectrum information and the request of regulating by the routing forwarding device, implement secondary automatically and regulate.
11 1 kinds of channel power dynamic equalization control methods that realize the optical-fiber network optical transceiver comprise that step is as follows:
Step 1, when moving in system, set the yield value of image intensifer in the optical transceiver according to requirement of system design by amplifier controller, equalizer controller, spectral detection controller, each control unit of Node Controller, the initial value of each channel attenuation amount of attenuator array carries out work according to the initial power configuration status under no-console condition;
Step 2, automatically safeguarding or the user interferes under the control, detecting target place node, Node Controller requires spectral detection point to compose monitoring means by optical channel to monitor out each channel power of key light path and report;
Step 3, this Node Controller are compared according to data that report and the destination channel power spectrum that is stored in the impact point Node Controller, calculate the relative adjustment spectrum of needs according to the target spectrum of system, and data format by appointment is handed down to dynamic channel equalizer controller, the realization dynamic adjustments;
The performance of the Node Controller commander spectrum monitoring unit duplicate measurements main optical path of step 4, target detection point also reports controller, and controller carries out data processing and comparison, as meets the demands, and then dynamically control finishes, and claims one time iteration control; If can not meet the demands, then return step 3, carry out iteration control once more.
12 channel power dynamic equalization control methods as realization optical-fiber network optical transceiver as described in the claim 11, in the described step 3:
If spectral detection point output in this optical transceiver, then the optical transceiver Node Controller will be regulating spectrum information and regulating and ask to send to channel power equalization device controller by devices communicating/control bus;
If test point is at other node of the downstream of channel-equalization Control Node, the test point Node Controller will be regulated the channel power relative different regulating spectrum information and regulating and ask to send to upstream optical transceiver channel power equalization device controller by the routing forwarding device behind the channel power equalization device controller response command.
The 13 channel power dynamic equalization control methods as realization optical-fiber network optical transceiver as described in the claim 11 is characterized in that: in each iterative process, implement quiescent point locking control automatically in dynamic equalizer.
The 14 channel power dynamic equalization control methods as realization optical-fiber network optical transceiver as described in the claim 11 is characterized in that the balanced control of channel power of described optical transceiver further comprises:
Step 1: start or system reset;
Step 2: introduce executable program in start or system reset situation lower channel power controller from its inner program storage, and the default configuration data, comprise default static working point data, and the spectrum control data;
Step 3: carry out attenuator array input, Output optical power detection, but be used for determining current service aisle;
Step 4: carry out the judgement of operating state: system newly starts shooting/resets, or the input of controller I/O interface has the channel power regulating command;
Step 5:, then use default control data if system newly starts shooting, resets; If the adjusting command of channel power spectrum is arranged, then adopt biographys command stack under, carry out curve fitting to obtain to control and compose incremental data;
Step 6: by equalizer control interface, driving governor;
Step 7: after the operation of adjustable attenuator array response, controller sends to bus and controls successfully sign; If control data surmounts the equalizer adjustable range, then return failure flags, also can be used as warning information;
Step 8: to inquiring about of controller with the interface related order storehouse of I/O;
Step 9: carry out message and handle, controller carries out device talk by the I/O interface, if the order storehouse has querying command, then reports by search request; If the order storehouse has attenuator array decay spectra change order, then revise local configuration data.
The 15 channel power dynamic equalization control methods as realization optical-fiber network optical transceiver as described in the claim 11 is characterized in that the amplifier control of described optical transceiver further comprises:
Step 1: start or system reset;
Step 2: amplifier controller is introduced executable program from its inner program storage, and the default configuration data;
Step 3: carry out amplifier input, Output optical power detection, and computing amplifier work at present gain;
Step 4: operating state is judged, newly start shooting/reset as if system, or the input of controller I/O interface has the gain-adjusted instruction;
Step 5: if system newly starts shooting, resets, then use default control data, if the gain-adjusted order is arranged, then adopt the gain Configuration Values of biography under the command stack, driving amplifier obtains to specify gain;
Step 6: after the gain-adjusted, carry out the amplifier state and report;
Step 7: to inquiring about of controller with the interface related order storehouse of I/O;
Step 8: carry out message and handle, controller carries out device talk by the I/O interface, if the order storehouse has querying command, then reports by search request; If the order storehouse has amplifier gain change order, then revise local configuration data.
The 16 channel power dynamic equalization control methods as realization optical-fiber network optical transceiver as described in the claim 11 is characterized in that the spectral detection control of described optical transceiver further comprises:
Step 1: system newly starts shooting/resets;
Step 2: introduce default configuration data, comprise spectral detection mode of operation sign, scan light Directional Sign etc.;
Step 3: judge this machine mode of operation, under autosensing mode, or command stack has the spectra collection order;
Step 4: according to scan light Directional Sign, driven optical switch;
Step 5: start spectroscopic detector, obtain scanning result through its control interface, scanning result has channel power to compose for real;
Step 6: carry out storage, in order to inquiry;
Step 7: data are sent to devices communicating/control bus by controller I/O interface;
Step 8: to inquiring about of controller with the interface related order storehouse of I/O;
Step 9: carry out message and handle, controller carries out device talk by the I/O interface; If the order storehouse has the spectrum querying command, then report by search request; If the order storehouse has spectral detection state change newer command, then revise local configuration data.
The 17 channel power dynamic equalization control methods as realization optical-fiber network optical transceiver as described in the claim 11 is characterized in that the node control of described optical transceiver under service mode automatically further comprises:
Step 1: in-process in major cycle, function software periodically carries out this step, according to configuration sign differentiation state;
Step 2: assign the spectra collection order to the spectral detection controller;
Step 3: wait for the spectra collection result, treat that operation is finished after, obtain the real passage scanning optical spectrum data that have from devices communicating/control bus;
Step 4: current detection spectrum and target spectrum are compared, and the check spectral similarity if meet the demands, continues the major cycle process, does not meet the demands, and implements the balanced control of optical channel;
Step 5: if the output of spectral detection point in optical transceiver, Node Controller is assigned the spectrum adjusting command to channel controller, wherein comprises the real passage target decay spectra data that have; If spectral detection is at another node in downstream, then this Node Controller will send to correlated equilibrium device place, upstream Node Controller to the spectrum adjusting command through the route transponder, deliver to the channel power equalization controller by this intra-node communication bus again;
Step 6: wait for that the channel-equalization controller returns executing state, if spectral detection point output in optical transceiver obtains to judge behind the uploaded state from devices communicating/control bus; If spectral detection point is at another node of optical transceiver downstream, then optical transceiver sends to state information the Node Controller of detected downstream node through the route transponder;
Step 7: if main control computer reports by Computer I/O interface in this locality, if main control computer in the strange land, is delivered to the routing forwarding device with reporting information;
Step 8: attended operation is finished automatically, continues the major cycle process;
Step 9: the judgement of quiescent point;
Step 10: send the config update order to channel power equalization controller and amplifier controller;
Step 11: accepting state reporting information.
The 18 channel power dynamic equalization control methods as realization optical-fiber network optical transceiver as described in the claim 11 is characterized in that the node control of described optical transceiver under user's interference pattern further comprises:
Step 1: at local node, the Computer I that links to each other with Node Controller/O interface is imported the control command of main control computer as if main control computer, and sends interrupt requests to the CPU of Node Controller; If main control computer is in the strange land, then the routing forwarding device is received control information after unpack the acquisition order, and sends interrupt requests to the CPU of Node Controller;
Step 2: the Node Controller response is interrupted, and judges interrupt requests;
Step 3: assign the spectra collection order to the spectral detection controller;
Step 4: wait for the spectra collection result, treat that operation is finished after, obtain the real passage scanning optical spectrum data that have from devices communicating/control bus;
Step 5: current detection spectrum and target spectrum are compared the check spectral similarity;
Step 6: at the same node of optical transceiver, Node Controller is assigned the spectrum adjusting command to channel controller as if spectral detection, wherein comprises the real passage target decay spectra data that have; If spectral detection is at downstream node, then this Node Controller will send to the Node Controller of upstream relative photo terminal to the spectrum adjusting command through the route transponder, deliver to the channel power equalization controller by communication bus in the optical transceiver again;
Step 7: wait for that the channel-equalization controller returns executing state, if spectral detection point at the optical transceiver output, obtains to judge behind the uploaded state from devices communicating/control bus; If spectral detection is at another node of optical transceiver downstream, then optical transceiver sends to state information the Node Controller of detected downstream node through the route transponder;
Step 8: quiescent point is judged;
Step 9: send the config update order to channel power equalization controller and amplifier controller;
Step 10: accepting state reporting information;
Step 11: when spectrum satisfies the similitude requirement, finish adjusting, report current state to main control computer from Computer I/O interface or routing forwarding device;
Step 12: interrupt response finishes, the major cycle process of return node controller;
Step 13: when the channel power equalization device is regulated failure, stop regulating; Report current state from Computer I/O interface or routing forwarding device to main control computer;
Step 14: interrupt response finishes, the major cycle process of return node controller;
Step 15: when channel power equalization device or amplifier adjusting failure, stop regulating; Report current state from Computer I/O interface or routing forwarding device to main control computer;
Step 16: interrupt response finishes, the major cycle process of return node controller.
CNB031157335A 2003-03-07 2003-03-07 Dynamic channel power equalizing control device and method in optical terminal of optical network Expired - Fee Related CN100472995C (en)

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