CN102136866B - Optical transmission equipment, optical transmission system and optical transmission parameter configuration method - Google Patents
Optical transmission equipment, optical transmission system and optical transmission parameter configuration method Download PDFInfo
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- CN102136866B CN102136866B CN201010581109.0A CN201010581109A CN102136866B CN 102136866 B CN102136866 B CN 102136866B CN 201010581109 A CN201010581109 A CN 201010581109A CN 102136866 B CN102136866 B CN 102136866B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/506—Multiwavelength transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0254—Optical medium access
- H04J14/0261—Optical medium access at the optical multiplex section layer
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Abstract
The embodiment of the invention discloses optical transmission equipment, an optical transmission system and an optical transmission parameter configuration method. The optical transmission equipment comprises a first optical transmission unit and a second optical transmission unit, wherein the first and second optical transmission units correspond to different wavelength paths; a communication interface for interacting optical transmission parameters is arranged between the first and second optical transmission units; and the first and second optical transmission units are light emission units or light receiving units. By the technical scheme provided by the embodiment of the invention, the designing complexity of an optical transmission chip can be reduced.
Description
Technical field
The present invention relates to communication technical field, be specifically related to optical transmission device and optical transmission system and light transformation parameter collocation method.
Background technology
Light transmission is one of at present main data transfer mode, is especially applied in transport network.
As shown in Figure 1, in current optical transmission device, the transmission channel of different wave length configures respectively a pair of optical sender and optical receiver, and overlap light transmitting and receiving system can common transmitted optical fiber more, the information of the corresponding optical sender transmission of each optical receiver independent detection.Between the optical sender of each wavelength channel, the optical receiver of multiple wavelength channels is separate.
Because optical sender and the optical receiver of each wavelength channel are all separate, the transmitter and receiver of each wavelength channel carries out alone channel estimating, therefore each transmitter and receiver need to configure respectively independently channel estimation module, the relative like this design complexities that strengthens light transmission chip.
Summary of the invention
The embodiment of the present invention provides optical transmission device and optical transmission system and light transformation parameter collocation method, to reduce the design complexities of light transmission chip.
For solving the problems of the technologies described above, the embodiment of the present invention provides following technical scheme:
A kind of optical transmission device, comprising:
The first optical transmission unit and second optical transmission unit of corresponding different wave length channel;
Wherein, between described the first optical transmission unit and the second optical transmission unit, be provided with the communication interface for interacted light transformation parameter;
Described the first optical transmission unit and the second optical transmission unit are Optical Transmit Unit or light receiving unit.
A kind of light transformation parameter collocation method, comprising:
The first optical transmission unit, by the communication interface between the second optical transmission unit, receives the light transformation parameter that the second optical transmission unit sends;
The first optical transmission unit, according to the described smooth transformation parameter receiving, configures light transformation parameter corresponding to the first optical transmission unit;
Wherein, the corresponding different wave length channel of the first optical transmission unit and the second optical transmission unit, described the first optical transmission unit and the second optical transmission unit are Optical Transmit Unit or light receiving unit.
A kind of optical transmission system, comprising:
Light-emitting device and optical receiving device;
Wherein, described light-emitting device comprises:
Multiple Optical Transmit Units of corresponding different wave length channel; Between at least two Optical Transmit Units in described multiple Optical Transmit Unit, be provided with the communication interface for interacted light emission parameter;
And/or,
Described optical receiving device comprises:
Multiple light receiving units of corresponding different wave length channel; Between at least two light receiving units in described multiple light receiving unit, be provided with the communication interface that receives parameter for interacted light.
Therefore, in embodiment of the present invention optical transmission device, between the Optical Transmit Unit of corresponding different wave length channel or between light receiving unit, be provided with the communication interface for interacted light transformation parameter, making between the Optical Transmit Unit of corresponding different wave length channel or between light receiving unit can interacted light transformation parameter, this is just conducive to shared channel estimated result between Optical Transmit Unit or between light receiving unit, and then can reduce the design complexities of light transmission chip.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention and technical scheme of the prior art, to the accompanying drawing of required use in embodiment and description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of optical transmission device structural representation of prior art;
Fig. 2-a is that the embodiment of the present invention one provides a kind of optical transmission device schematic diagram;
Fig. 2-b is that the embodiment of the present invention one provides another kind of optical transmission device schematic diagram;
Fig. 2-c is that the embodiment of the present invention one provides another kind of optical transmission device schematic diagram;
Fig. 2-d is that the embodiment of the present invention one provides another kind of optical transmission device schematic diagram;
Fig. 2-e is that the embodiment of the present invention one provides another kind of optical transmission device schematic diagram;
Fig. 3-a is that the embodiment of the present invention one provides a kind of optical transmission unit position relationship schematic diagram;
Fig. 3-b is that the embodiment of the present invention one provides a kind of optical transmission unit position relationship schematic diagram;
Fig. 4 is that the embodiment of the present invention one provides a kind of optical transmission unit signal to flow to schematic diagram;
Fig. 5-a is that the embodiment of the present invention one provides mutual schematic diagram between a kind of Optical Transmit Unit;
Fig. 5-b is that the embodiment of the present invention one provides mutual schematic diagram between a kind of light receiving unit;
Fig. 6 is that the embodiment of the present invention two provides light transformation parameter collocation method schematic flow sheet;
Fig. 7 is that the embodiment of the present invention three provides a kind of optical transmission system schematic diagram.
Embodiment
The embodiment of the present invention provides optical transmission device and optical transmission system and light transformation parameter collocation method, can reduce the design complexities of light transmission chip.
In order to make those skilled in the art person understand better the present invention program, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, should belong to the scope of protection of the invention.
Embodiment mono-
An embodiment of optical transmission device of the present invention, can comprise: the first optical transmission unit of corresponding different wave length channel and the second optical transmission unit; Wherein, between the first optical transmission unit and the second optical transmission unit, be provided with the communication interface for interacted light transformation parameter; The first optical transmission unit and the second optical transmission unit are Optical Transmit Unit or light receiving unit.
Specifically, referring to Fig. 2-a, optical transmission device 200 can comprise: the first optical transmission unit 210 of corresponding different wave length channel and the second optical transmission unit 220; Between the first optical transmission unit 210 and the second optical transmission unit 220, be provided with the communication interface for interacted light transformation parameter;
In actual applications, the communication interface for interacted light transformation parameter arranging between the first optical transmission unit 210 and the second optical transmission unit 220 is direct-connected or indirect communication interface, that is to say, the first optical transmission unit 210 and the second optical transmission unit 220 can direct interaction light transformation parameters, or the first optical transmission unit 210 and the second optical transmission unit 220 also can forward light transformation parameter (being indirect interaction light transformation parameter) by other intermediate module.
Wherein, the first optical transmission unit 210 and the second optical transmission unit 220 can be all Optical Transmit Unit (being that optical transmission device 200 is light-emitting device), or, the first optical transmission unit 210 and the second optical transmission unit 220 can be all light receiving unit (being that optical transmission device 200 is light-emitting device), certainly, optical transmission device 200 can be also light-emitting device, is also optical receiving device, both comprise Optical Transmit Unit, also comprised light receiving unit.
Optical Transmit Unit in the present embodiment for example can be: the optical sender of direct modulation transmitter, external modulation transmitter, the direct modulation transmitter of various single chip integrated multi-wavelengths or multi-wavelength external modulation transmitter or other type etc.; Light receiving unit for example can be: coherent receiver or direct-detection receiver, various single chip integrated multi-wavelength direct-detection receivers or single chip integrated multi-wavelength are relevant detects receiver, or the optical receiver of other type etc.
Can find out, due between the Optical Transmit Unit of corresponding different wave length channel in optical transmission device or be provided with the communication interface for interacted light transformation parameter between light receiving unit, making between the Optical Transmit Unit of corresponding different wave length channel or between light receiving unit can interacted light transformation parameter, this is just conducive to shared channel estimated result between Optical Transmit Unit or between light receiving unit (for example can share modulation format, emission rate, coding expense and pre-distortion coefficients isoparametric one or more), and then can reduce the design complexities of light transmission chip.
In actual applications, the first optical transmission unit 210 and the second optical transmission unit 220 can be positioned at difference or same chip; Or, be positioned on different or same board or line card.
Under a kind of application scenarios, the second optical transmission unit 220, can be used for by and the first optical transmission unit 210 between communication interface, send one or more of following light transformation parameter to the first optical transmission unit 210: modulation format, emission rate, coding expense and pre-distortion coefficients (such as abbe number, non linear coefficient etc.);
The first optical transmission unit 210, for by and the second optical transmission unit 220 between communication interface, receive the light transformation parameter that sends of the second optical transmission unit 220; According to the light transformation parameter receiving, the light transformation parameter of configuration the first Optical Transmit Unit 210 correspondences.
In addition, under another kind of application scenarios, the first optical transmission unit 210, also can be used for by and the second optical transmission unit 220 between communication interface, send one or more of following light transformation parameter to the second optical transmission unit 220: modulation format, emission rate, coding expense and pre-distortion coefficients;
The second optical transmission unit 220, also can be used for by and the first optical transmission unit 210 between communication interface, receive the light transformation parameter that sends of the first optical transmission unit 210; According to the light transformation parameter receiving, the light transformation parameter of configuration the second Optical Transmit Unit 220 correspondences.
In actual applications, the first optical transmission unit 210 or the second optical transmission unit 220 can be periodically or in the time of other optical transmission unit request, send light transformation parameter to other optical transmission unit.
For instance, under a kind of application scenarios, if the first optical transmission unit 210 and the second optical transmission unit 220 are Optical Transmit Unit, the first optical transmission unit 210 can be used for, the abbe number of the fiber channel that reception the second optical transmission unit 220 sends; And according to this light transformation parameter receiving, obtain the Dispersion Function that this abbe number is corresponding and (for example can preset a dispersion table that records abbe number and Dispersion Function mapping corresponding relation, the first optical transmission unit 210 can obtain the Dispersion Function that this abbe number is corresponding by searching this dispersion table), this Dispersion Function obtaining is configured to the first optical transmission unit 210 light signal is carried out the Dispersion Function of pre-distortion.Dispersion Function that 210 of follow-up the first optical transmission units can utilize configuration carries out pre-distortion to light signal, under this scene, because signal has preset dispersion predistortion, thereby the dispersion that can reduce fiber channel impact that signal is produced, receiving terminal can receive relatively higher-quality signal like this.
Again for instance, under a kind of application scenarios, if the first optical transmission unit 210 and the second optical transmission unit 220 are Optical Transmit Unit, the first optical transmission unit 210 can be used for, the fiber lengths of the fiber channel that reception the second optical transmission unit 220 sends; According to default modulation format and/or transmission rate, with the corresponding relation of fiber lengths, obtain corresponding modulation format and/or the transmission rate of fiber lengths receiving; The modulation format of the first optical transmission unit 210 and/or transmission rate are configured to this modulation format and/or the transmission rate that obtain.210 of follow-up the first optical transmission units can carry out signal modulation and transmission according to the modulation format of this configuration and/or transmission rate.
Again for instance, under a kind of application scenarios, if the first optical transmission unit 210 and the second optical transmission unit 220 are light receiving unit, the first optical transmission unit 210 can be used for, the abbe number of the fiber channel that reception the second optical transmission unit 220 sends; According to this abbe number receiving, obtain the Dispersion Function that this abbe number is corresponding (having certain corresponding relation between the abbe number of different fiber channel), the Dispersion Function that this Dispersion Function obtaining is configured to the first optical transmission unit 210 and light signal is carried out to dispersion compensation processing.210 of follow-up the first optical transmission units can carry out according to the Dispersion Function of this configuration the dispersion compensation processing of signal.
Again for instance, under a kind of application scenarios, if the first optical transmission unit 210 and the second optical transmission unit 220 are light receiving unit, the first optical transmission unit 210 can be used for, the non linear coefficient of the fiber channel that reception the second optical transmission unit 220 sends; According to this non linear coefficient receiving, the nonlinear phase skew that the light signal that the light signal that acquisition the second optical transmission unit 220 receives receives the first optical transmission unit 210 in Optical Fiber Transmission process causes; Be the first optical transmission unit 210 carries out nonlinear phase migration nonlinear phase skew to light signal by this nonlinear phase offset configuration obtaining.210 of follow-up the first optical transmission units can carry out the nonlinear phase migration processing of signal according to the nonlinear phase skew of this configuration, are conducive to like this promote the quality that receives signal.
It should be noted that, in Fig. 2-a, mainly illustrate as example to be provided with between certain two optical transmission unit in optical transmission device 200 (as the first optical transmission unit 210 and the second optical transmission unit 220) for the scene of the communication interface of interacted light transformation parameter, certainly, between other optical transmission unit of optical transmission device 200, also can be provided with the communication interface for interacted light transformation parameter, also just say, between the optical transmission unit of at least two corresponding different wave length channels in optical transmission device 200, can be provided with the communication interface for interacted light transformation parameter, and between each optical transmission unit, the interactive mode of the mode of interacted light transformation parameter and above-mentioned the first optical transmission unit 210 of giving an example and the second optical transmission unit 220 is similar.
Wherein, the connected mode between the communication interface of interacted light transformation parameter arranging between each optical transmission unit includes but not limited to: circuit board leads, chip internal lead-in wire, optical fiber, copper cable, backboard switching or microwave etc.In actual applications, between each optical transmission unit, can carry out alternately based on existing certain agreement or certain proprietary protocol, and the data format of mutual light transformation parameter two arbitrary formats of sending out agreement of can communicating by letter between each optical transmission unit.
Under a kind of application scenarios, if optical transmission device 200 is light-emitting device, and it comprises multiple (at least two) Optical Transmit Unit of corresponding different wave length channel; Between at least two Optical Transmit Units in the plurality of Optical Transmit Unit, be provided with the communication interface for interacted light emission parameter.
Can be referring to Fig. 2-b and 2-c, wherein, referring to Fig. 2-b show a kind of only have between part Optical Transmit Unit, be provided with the scene for the communication interface of interacted light emission parameter; Show between a kind of whole Optical Transmit Unit and be all provided with the scene for the communication interface of interacted light emission parameter referring to Fig. 2-c.
If optical transmission device 200 is optical receiving device, and it comprises multiple (at least two) light receiving unit of corresponding different wave length channel; Between at least two light receiving units in the plurality of light receiving unit, be provided with the communication interface for interacted light emission parameter.
Can be referring to Fig. 2-d and 2-e, wherein, referring to Fig. 2-d show a kind of only have between part light receiving unit, be provided with the scene that receives the communication interface of parameter for interacted light; Show and between a kind of whole light receiving unit, be all provided with the scene that receives the communication interface of parameter for interacted light referring to Fig. 2-e.
In actual applications, be provided with for each Optical Transmit Unit or each light receiving unit of the communication interface of interacted light transformation parameter and can be positioned at same optical transmission unit (OTU, Optical Transport Unit) on line card, or, be provided with for each Optical Transmit Unit or each light receiving unit of the communication interface of interacted light transformation parameter and also can be positioned at different OTU line cards.
Referring to Fig. 3-a and Fig. 3-b, Fig. 3-a shows a kind of being provided with for multiple Optical Transmit Units and multiple light receiving unit of the communication interface of interacted light transformation parameter and is positioned at the scene on same OTU line card.Armed data are broken down into multiple signals after optical module, and each Optical Transmit Unit respectively Dui Ge road signal carries out the modulation of respective wavelength, are finally multiplexed with a road signal transmitting again; The corresponding Optical Receivers of each wavelength channel of receiving terminal detects the signal of corresponding wavelength, after the signal multiplexing Wei Yi road signal of each wavelength, continues the transmission of downward coagulation unit by optical module interface.Fig. 3-b shows a kind of being provided with for multiple Optical Transmit Units and multiple light receiving unit of the communication interface of interacted light transformation parameter and is positioned at the scene on different OTU line cards.Certainly, some scene may be the combination of Fig. 3-a and Fig. 3-b, be provided with for a wherein part for multiple optical transmission units of the communication interface of interacted light transformation parameter and be positioned at same OTU line card, and another portion is positioned on other OTU line card.
A kind of Optical Transmit Unit of the embodiment of the present invention can comprise: laser Laser (can be for example the laser of distributed feedback laser or other type), modulator mod, wavelength locking unit (λ-locker) etc., example as shown in Figure 4, laser Laser is as light source, wavelength locking unit λ-locker locked laser Laser sends the wavelength of light signal, and armed data are carried on light signal by modulator; The armed data of multichannel are modulated by the modulator of the Optical Transmit Unit of corresponding different wave length channel, finally transfer out by Optical Transmit Unit.
In actual applications, certain optical transmission unit in optical transmission device can send light transformation parameter to other optical transmission unit that has with it communication interface, and other optical transmission unit obtains channel estimation results accordingly, and then can configure accordingly.Below by mutual several smooth transformation parameters between a kind of optical transmission unit of ad hoc structure, the process of carrying out signal processing is that example describes.
For example two Optical Transmit Unit Tx-1 shown in Fig. 5-a and Tx-2, Optical Transmit Unit Tx-2 obtains after the abbe number of fiber channel, by and Tx-1 between communication interface this abbe number is delivered to the Digital Signal Processing (DSP of Tx-1, Digital Signal Processing) in module (or certain memory), transfer mode can be certain known Handshake Protocol, or proprietary protocol, or regularly read etc.When the DSP of Tx-1 module obtains after the abbe number from Tx-2, can, based on predefined dispersion table (recording abbe number and Dispersion Function mapping corresponding relation in dispersion table), search and find corresponding Dispersion Function; DSP module in Tx-1 is carried out pre-distortion based on this Dispersion Function to the signal of coding module input, the pre-distorted signals carrying out after pre-distortion passes through digital to analog converter (DAC, Digital to Analog Converter) array obtains analog signal, then amplifies by drive array; Finally obtain light signal output by modulators modulate.Be appreciated that because signal carries out pre-distortion in advance, the impact that the dispersion that therefore can reduce fiber channel produces signal, can receive high-quality signal at receiving terminal like this.
Again for example, Optical Transmit Unit Tx-2 obtains after the fiber lengths of fiber channel, by and Tx-1 between communication interface this fiber lengths is delivered in the DSP module (or certain memory) of Tx-1, transfer mode can be certain known Handshake Protocol, or proprietary protocol, or timing is read.When the DSP of Tx-1 module obtains after the fiber lengths information from Tx-2, can be based on predefined allocation list (recording the fiber lengths of different range and the corresponding relation of modulation format and transmission rate in this allocation list), modulation format and the transmission rate of configuration Tx-1 can better be transmitted to meet such modulation format and transmission rate on the optical fiber of this known length; Set in DSP module after the modulation format and transmission rate of Tx-1, arrange the signal of coding module input is shone upon based on these, after exporting the modulation signal having shone upon and amplify by drive array by DAC array, then obtain light signal output by modulators modulate.
Wherein, Tx-1 and Tx-2 can be positioned at two dsp chips, also can be positioned at same dsp chip, also can be positioned on same or different line cards.
For example two light receiving unit Rx-1 shown in Fig. 5-b and Rx-2 again, the abbe number of the acquisition fiber channel of Rx-2, by and Rx-1 between communication interface this abbe number is delivered in the Digital Signal Processing DSP module (or certain memory) of Rx-1, transfer mode can be certain known Handshake Protocol, or proprietary protocol, or timing is read.When the DSP of Rx-1 module obtains after the channel dispersion coefficient from Rx-2, can find corresponding Dispersion Function based on predefined dispersion table, DSP module in Rx-1 based on Dispersion Function to analog to digital converter (ADC, Analog to Digital Converter) signal of array input, carry out dispersion compensation processing in DSP inside modules, follow-uply again the signal carrying out after dispersion compensation is carried out to other processing.
Again for example, after the non linear coefficient of the acquisition fiber channel of Rx-2, by and Rx-1 between communication interface this non linear coefficient is delivered in the Digital Signal Processing DSP module (or certain memory) of Rx-1, transfer mode can be certain known Handshake Protocol, or proprietary protocol, or timing is read.When the DSP of Rx-1 module obtains after the non linear coefficient from Rx-2, the nonlinear phase skew (or nonlinear phase skew of the light signal directly Rx-1 being received in Optical Fiber Transmission process according to the light signal of non linear coefficient calculating Rx-2 reception) that the light signal that can find the light signal of Rx-2 reception in Optical Fiber Transmission process, Rx-1 to be received based on predefined look-up table causes, DSP module is carried out the nonlinear phase migration processing of signal according to the nonlinear phase skew of this acquisition, is conducive to like this promote the quality that receives signal.
Wherein, Rx-1 and Rx-2 can be positioned at two dsp chips, also can be positioned at same dsp chip, also can be positioned on same or different line cards.
In actual applications, can also there is the optical transmission unit of other structure, also other light transformation parameter alternately between optical transmission unit, its processing mode and above-mentioned similar for example repeats no more herein.
Can find out, in the present embodiment optical transmission device, between the Optical Transmit Unit of corresponding different wave length channel or between light receiving unit, be provided with the communication interface for interacted light transformation parameter, making between the Optical Transmit Unit of corresponding different wave length channel or between light receiving unit can interacted light transformation parameter, this is just conducive to shared channel estimated result between Optical Transmit Unit or between light receiving unit, and then can reduce the design complexities of light transmission chip.
Further, between the Optical Transmit Unit of corresponding different wave length channel or between light receiving unit, pass through shared channel estimated result, be conducive to promote signal transmission and the quality of reception.
Embodiment bis-
An embodiment of light transformation parameter collocation method of the present invention, can comprise: the first optical transmission unit, by the communication interface between the second optical transmission unit, receives the light transformation parameter that the second optical transmission unit sends; The first optical transmission unit, according to this light transformation parameter receiving, configures light transformation parameter corresponding to the first optical transmission unit; Wherein, the corresponding different wave length channel of the first optical transmission unit and the second optical transmission unit, the first optical transmission unit and the second optical transmission unit are Optical Transmit Unit or light receiving unit.
Referring to Fig. 6, concrete steps can comprise:
610, the first optical transmission unit, by the communication interface between the second optical transmission unit, receives the light transformation parameter that the second optical transmission unit sends;
Wherein, the corresponding different wave length channel of the first optical transmission unit and the second optical transmission unit, the first optical transmission unit and the second optical transmission unit are Optical Transmit Unit or light receiving unit.
Under a kind of application scenarios, the second optical transmission unit can obtain after some light transformation parameter, by the communication interface between the first optical transmission unit, the light transformation parameter sending to the first optical transmission unit, transfer mode can be certain known Handshake Protocol, or proprietary protocol, or regularly read etc.
Under a kind of application scenarios, the first optical transmission unit for example can by and the second optical transmission unit between communication interface, receive one or more of following light transformation parameter that the second optical transmission unit sends: modulation format, emission rate, coding expense and pre-distortion coefficients etc.
620, the first optical transmission unit, according to this light transformation parameter receiving, configures light transformation parameter corresponding to the first optical transmission unit;
Under a kind of application scenarios, the various smooth transformation parameter that the first optical transmission unit can send according to the second optical transmission unit receiving, configures the light transformation parameter that the first optical transmission unit is corresponding.
For example, if the first optical transmission unit and the second optical transmission unit are Optical Transmit Unit, the first optical transmission unit can receive the abbe number of the fiber channel of the second optical transmission unit transmission; According to the described smooth transformation parameter receiving, obtain the Dispersion Function that described abbe number is corresponding, the described Dispersion Function obtaining is configured to the first optical transmission unit light signal is carried out the Dispersion Function of pre-distortion.
Again for example, if the first optical transmission unit and the second optical transmission unit are Optical Transmit Unit, the first optical transmission unit can receive the fiber lengths of the fiber channel of the second optical transmission unit transmission; According to default modulation format and/or transmission rate, with the corresponding relation of fiber lengths, obtain corresponding modulation format and/or the transmission rate of fiber lengths of described reception; The modulation format of the first optical transmission unit and/or transmission rate are configured to the described modulation format and/or the transmission rate that obtain.
Again for example, if the first optical transmission unit and the second optical transmission unit are light receiving unit, the first optical transmission unit can receive the abbe number of the fiber channel of the second optical transmission unit transmission; According to the described abbe number receiving, obtain the Dispersion Function that described abbe number is corresponding, the Dispersion Function that the described Dispersion Function obtaining is configured to the first optical transmission unit and light signal is carried out to dispersion compensation processing.
Again for example, if the first optical transmission unit and the second optical transmission unit are light receiving unit, the first optical transmission unit can receive the non linear coefficient of the fiber channel of the second optical transmission unit transmission; According to the described non linear coefficient receiving, the nonlinear phase skew that the light signal that the light signal that acquisition the second optical transmission unit receives receives the first optical transmission unit in Optical Fiber Transmission process causes; Be the first optical transmission unit carries out nonlinear phase migration nonlinear phase skew to light signal by the described nonlinear phase offset configuration obtaining.
In actual applications, also other light transformation parameter alternately between the second optical transmission unit and the first optical transmission unit, its processing mode and above-mentioned similar for example repeats no more herein.
The structure that is appreciated that the present embodiment the first optical transmission unit and the second optical transmission unit can be as the first optical transmission unit 210 in above-mentioned optical transmission device 200 and the second optical transmission unit 220.
Can find out, in the present embodiment optical transmission device, between the Optical Transmit Unit of corresponding different wave length channel or between light receiving unit, be provided with the communication interface for interacted light transformation parameter, between the Optical Transmit Unit of corresponding different wave length channel or between light receiving unit, pass through interacted light transformation parameter, carry out the configuration of corresponding light transformation parameter, shared channel estimated result between Optical Transmit Unit or between light receiving unit can be realized, and then the design complexities of light transmission chip can be reduced.
Further, between the Optical Transmit Unit of corresponding different wave length channel or between light receiving unit, pass through shared channel estimated result, be conducive to promote signal transmission and the quality of reception.
Embodiment tri-
Referring to Fig. 7, the embodiment of the present invention also provides a kind of optical transmission system, can comprise: light-emitting device 610 and optical receiving device 720;
Wherein, light-emitting device 710 can comprise:
Multiple Optical Transmit Units of corresponding different wave length channel; Between at least two Optical Transmit Units in the plurality of Optical Transmit Unit, be provided with the communication interface for interacted light emission parameter;
And/or,
Optical receiving device 720 comprises:
Multiple light receiving units of corresponding different wave length channel; Between at least two light receiving units in the plurality of light receiving unit, be provided with the communication interface that receives parameter for interacted light.
Under a kind of application scenarios, at least two of light-emitting device 710 are provided with for one of them Optical Transmit Unit of the Optical Transmit Unit of the communication interface of interacted light emission parameter can send one or more of following light transformation parameter to other Optical Transmit Unit: modulation format, emission rate, coding expense and pre-distortion coefficients etc.; And this other Optical Transmit Unit can be by corresponding communication interface, receive light transformation parameter; And can, according to this light transformation parameter receiving, configure corresponding light transformation parameter.
Under a kind of application scenarios, at least two of optical receiving device 720 are provided with for one of them light receiving unit of the light receiving unit of the communication interface of interacted light emission parameter can send one or more of following light transformation parameter to other light receiving unit: modulation format, emission rate, coding expense and pre-distortion coefficients etc.; And this other light receiving unit can be by corresponding communication interface, receive this light transformation parameter; And can, according to the light transformation parameter receiving, configure corresponding light transformation parameter.
Be appreciated that the as above optical transmission device 200 in embodiment of light-emitting device 710 or optical receiving device 720.Being provided with between the Optical Transmit Unit for the communication interface of interacted light emission parameter in the light-emitting device 710 of the present embodiment, or being provided with between the Optical Transmit Unit for the communication interface of interacted light emission parameter in light-emitting device 720, can be mutual based on carry out light transformation parameter as the interactive mode in above-mentioned embodiment of the method, can be according to the method specific implementation in said method embodiment, its specific implementation process can, with reference to the associated description in above-described embodiment, repeat no more herein.
It should be noted that, those skilled in the art also should know, the embodiment described in specification all belongs to preferred embodiment, and related action and module might not be that the present invention is necessary.In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part of detailed description, can be referring to the associated description of other embodiment.
To sum up, in embodiment of the present invention optical transmission device, between the Optical Transmit Unit of corresponding different wave length channel or between light receiving unit, be provided with the communication interface for interacted light transformation parameter, making between the Optical Transmit Unit of corresponding different wave length channel or between light receiving unit can interacted light transformation parameter, this is just conducive to shared channel estimated result between Optical Transmit Unit or between light receiving unit, and then can reduce the design complexities of light transmission chip.
Further, between the Optical Transmit Unit of corresponding different wave length channel or between light receiving unit, pass through shared channel estimated result, be conducive to promote signal transmission and the quality of reception.
One of ordinary skill in the art will appreciate that all or part of step in the whole bag of tricks of above-described embodiment is can carry out the hardware that instruction is relevant by program to complete, this program can be stored in a computer-readable recording medium, and storage medium can comprise: read-only memory, random asccess memory, disk or CD etc.
The optical transmission device above embodiment of the present invention being provided and optical transmission system and light transformation parameter collocation method are described in detail, applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, to sum up, this description should not be construed as limitation of the present invention meanwhile.
Claims (8)
1. an optical transmission device, is characterized in that, comprising:
The first optical transmission unit and second optical transmission unit of corresponding different wave length channel;
Wherein, between described the first optical transmission unit and the second optical transmission unit, be provided with the communication interface for interacted light transformation parameter;
Described the first optical transmission unit and the second optical transmission unit are Optical Transmit Unit, or described the first optical transmission unit and the second optical transmission unit are light receiving unit;
Wherein, the communication interface for interacted light transformation parameter arranging between the first optical transmission unit and the second optical transmission unit is direct-connected or indirect communication interface;
Described the second optical transmission unit, for by and the first optical transmission unit between communication interface, send one or more of following light transformation parameter to the first optical transmission unit: modulation format, emission rate, coding expense and pre-distortion coefficients;
Described the first optical transmission unit, for by and the second optical transmission unit between communication interface, receive second optical transmission unit send light transformation parameter; According to the described smooth transformation parameter receiving, configure the light transformation parameter that described the first optical transmission unit is corresponding.
2. optical transmission device according to claim 1, is characterized in that,
Described the first optical transmission unit and the second optical transmission unit are positioned at same chip; Or, be positioned on same board or line card.
3. a light transformation parameter collocation method, is characterized in that, comprising:
The first optical transmission unit, by the communication interface between the second optical transmission unit, receives the light transformation parameter that the second optical transmission unit sends;
The first optical transmission unit, according to the described smooth transformation parameter receiving, configures light transformation parameter corresponding to the first optical transmission unit;
Wherein, the corresponding different wave length channel of the first optical transmission unit and the second optical transmission unit, described the first optical transmission unit and the second optical transmission unit are Optical Transmit Unit, or described the first optical transmission unit and the second optical transmission unit are light receiving unit;
Wherein, receive the light transformation parameter that the second optical transmission unit sends, comprising: one or more of the following light transformation parameter that reception the second optical transmission unit sends: modulation format, emission rate, coding expense and pre-distortion coefficients.
4. method according to claim 3, is characterized in that,
If the first optical transmission unit and the second optical transmission unit are Optical Transmit Unit,
The light transformation parameter that described reception the second optical transmission unit sends, comprising:
Receive the abbe number of the fiber channel of the second optical transmission unit transmission;
Described the first optical transmission unit is according to the described smooth transformation parameter receiving, and light transformation parameter corresponding to configuration the first optical transmission unit, comprising:
The first optical transmission unit, according to the described abbe number receiving, obtains the Dispersion Function that described abbe number is corresponding, the described Dispersion Function obtaining is configured to the first optical transmission unit light signal is carried out the Dispersion Function of pre-distortion.
5. method according to claim 3, is characterized in that,
If the first optical transmission unit and the second optical transmission unit are Optical Transmit Unit,
The light transformation parameter that described reception the second optical transmission unit sends, comprising:
Receive the fiber lengths of the fiber channel of the second optical transmission unit transmission;
Described according to the described smooth transformation parameter receiving, light transformation parameter corresponding to configuration the first optical transmission unit, comprising:
According to default modulation format and/or transmission rate, with the corresponding relation of fiber lengths, obtain corresponding modulation format and/or the transmission rate of fiber lengths of described reception; The modulation format of the first optical transmission unit and/or transmission rate are configured to the described modulation format and/or the transmission rate that obtain.
6. method according to claim 3, is characterized in that,
If the first optical transmission unit and the second optical transmission unit are light receiving unit,
The light transformation parameter that described reception the second optical transmission unit sends, comprising: the abbe number that receives the fiber channel of the second optical transmission unit transmission;
Described the first optical transmission unit is according to the described smooth transformation parameter receiving, and the light transformation parameter of configuration the first optical transmission unit, comprising:
The first optical transmission unit, according to the described abbe number receiving, obtains the Dispersion Function that described abbe number is corresponding, the Dispersion Function that the described Dispersion Function obtaining is configured to the first optical transmission unit and light signal is carried out to dispersion compensation processing.
7. method according to claim 3, is characterized in that,
If the first optical transmission unit and the second optical transmission unit are light receiving unit,
The light transformation parameter that described reception the second optical transmission unit sends, comprising: the non linear coefficient that receives the fiber channel of the second optical transmission unit transmission;
Described the first optical transmission unit is according to the described smooth transformation parameter receiving, and the light transformation parameter of configuration the first optical transmission unit, comprising:
The first optical transmission unit is according to the described non linear coefficient receiving, and the nonlinear phase that the light signal that the light signal that acquisition the second optical transmission unit receives receives the first optical transmission unit in Optical Fiber Transmission process causes is offset; Be the first optical transmission unit carries out nonlinear phase migration nonlinear phase skew to light signal by the described nonlinear phase offset configuration obtaining.
8. an optical transmission system, is characterized in that, comprising:
Light-emitting device and optical receiving device;
Wherein, described light-emitting device comprises:
Multiple Optical Transmit Units of corresponding different wave length channel; Between at least two Optical Transmit Units in described multiple Optical Transmit Unit, be provided with the communication interface for interacted light emission parameter; Wherein, at least two of described light-emitting device be provided with for one of them Optical Transmit Unit of the Optical Transmit Unit of the communication interface of interacted light emission parameter for, send one or more of following light transformation parameter to other Optical Transmit Unit: modulation format, emission rate, coding expense and pre-distortion coefficients; Described other Optical Transmit Unit, for by corresponding communication interface, receives light transformation parameter; And can, according to this light transformation parameter receiving, configure corresponding light transformation parameter;
And/or,
Described optical receiving device comprises:
Multiple light receiving units of corresponding different wave length channel; Between at least two light receiving units in described multiple light receiving unit, be provided with the communication interface that receives parameter for interacted light; Wherein, at least two of described optical receiving device be provided with for one of them light receiving unit of the light receiving unit of the communication interface of interacted light emission parameter for, send one or more of following light transformation parameter to other light receiving unit: modulation format, emission rate, coding expense and pre-distortion coefficients; Described other light receiving unit, for by corresponding communication interface, receives this light transformation parameter; And can configure corresponding light transformation parameter according to the light transformation parameter receiving.
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| CN201010581109.0A CN102136866B (en) | 2010-12-09 | 2010-12-09 | Optical transmission equipment, optical transmission system and optical transmission parameter configuration method |
| PCT/CN2011/083432 WO2012075915A1 (en) | 2010-12-09 | 2011-12-05 | Optical transmission apparatus and optical transmission system and method for configuring optical transmission parameter |
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| EP2804334A1 (en) * | 2013-05-13 | 2014-11-19 | Xieon Networks S.à.r.l. | Method, device and communication system for reducing optical transmission impairments |
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| CN101034181A (en) * | 2006-03-10 | 2007-09-12 | 中兴通讯股份有限公司 | Regulation method and device for wavelength-division multiplex system residual chromatic dispersion compensation |
| CN101159507A (en) * | 2006-08-25 | 2008-04-09 | 日本电气株式会社 | Optical communication system, optical communication apparatus, and optical communication method thereof |
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| US20030208779A1 (en) * | 2002-04-15 | 2003-11-06 | Green Samuel I. | System and method for transmitting digital video over an optical fiber |
| JP4410789B2 (en) * | 2006-12-08 | 2010-02-03 | 株式会社日立コミュニケーションテクノロジー | Passive optical network system, optical termination device and optical network unit |
| WO2009001437A1 (en) * | 2007-06-26 | 2008-12-31 | Fujitsu Limited | Optically interfacing method and its apparatus |
| CN101729949B (en) * | 2009-12-21 | 2013-06-19 | 烽火通信科技股份有限公司 | WDM PON device with dynamically allocable wavelengths |
| CN102136866B (en) * | 2010-12-09 | 2014-07-30 | 华为技术有限公司 | Optical transmission equipment, optical transmission system and optical transmission parameter configuration method |
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| CN101034181A (en) * | 2006-03-10 | 2007-09-12 | 中兴通讯股份有限公司 | Regulation method and device for wavelength-division multiplex system residual chromatic dispersion compensation |
| CN101159507A (en) * | 2006-08-25 | 2008-04-09 | 日本电气株式会社 | Optical communication system, optical communication apparatus, and optical communication method thereof |
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