CN101605276A - The transmission method of light signal and device - Google Patents
The transmission method of light signal and device Download PDFInfo
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- CN101605276A CN101605276A CNA2008101101837A CN200810110183A CN101605276A CN 101605276 A CN101605276 A CN 101605276A CN A2008101101837 A CNA2008101101837 A CN A2008101101837A CN 200810110183 A CN200810110183 A CN 200810110183A CN 101605276 A CN101605276 A CN 101605276A
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Abstract
The invention discloses a kind of transmission method and device of light signal, relate to the optical-fiber network technical field, can only the problem that light signal transmits be invented with single-rate and fixing spectrum intervals for current optical-fiber network for solving in the prior art.The embodiment of the invention provides a kind of transmission method of light signal, comprising: receive the light signal to be transmitted of two-way different rates at least; The transmission means of wherein at least one road of change light signal; With light signal after the change transmission means and the light signal of not changing transmission means, send together by optical fiber.Adopt the embodiment of the invention not only can improve the information transfer efficiency of optical-fiber network, and improved bandwidth utilization.
Description
Technical field
The present invention relates to the optical-fiber network technical field, particularly the transmission method of light signal and device.
Background technology
The user is growing to bandwidth demand, impelled optical-fiber network from the 2.5Gbps/10Gbps wavelength division multiplexed network to the evolution of 40Gbps/100Gbps wavelength division multiplexed network.Existing 2.5Gbps/10Gbps DWDM (DenseWavelength Division Multiplexing, dense wave division multipurpose) there is polytype in the employed transmission medium optical fiber of network, and the service band of every kind of optical fiber, dispersion tolerance, PMD tolerance limit etc. differ widely.Spectrum intervals at the system that every kind of transmission rate adopted is also variant.
In the prior art, under the situation of 40Gbps speed, PXC (Photonic Cross Connection, photon intersects), WSS (Wavelength Selective Switch, wavelength-selective switches), optical fiber can produce parameter influence to different modulation formats, different transmission ranges.Described parameter, comprise: power attenuation, amplifier gain (Amplifier Gain), nonlinear factor (Nonlinear coefficients), chromatic dispersion (Chromatic Dispersion), polarization mode dispersion (Polarization ModeDispersion, PMD), dispersion slope (Chromatic Dispersion Slope), Optical Signal To Noise Ratio (OpticalSignal to Noise Ratio, OSNR), quality factor (Q-factor) etc.For example: in the networking of 40Gbps, must carry out careful planning, carry out the debugging of system and the distribution of luminous power, with the transmission window of each link of adaptive system.Like this, can only carry out the signal transmission with 40Gbps speed and pre-configured spectrum intervals and wavelength in the network of current 40Gbps, be difficult to carry out again the reallocation of wavelength, spectrum intervals.
In realizing process of the present invention, the inventor finds following problem at least: can only light signal be transmitted with single-rate and fixing spectrum intervals for the optical-fiber network of having built well.
Summary of the invention
Use the embodiment of the invention, can realize the mixed biography of different rates light signal.
On the one hand, the embodiment of the invention provides a kind of transmission method of light signal.
The transmission method of a kind of light signal that the embodiment of the invention provides comprises:
Receive the light signal to be transmitted of two-way different rates at least;
The transmission means of wherein at least one road of change light signal;
With light signal after the change transmission means and the light signal of not changing transmission means, send together by optical fiber.
On the other hand, the embodiment of the invention provides a kind of transmitting device of light signal.
The transmitting device of a kind of light signal that the embodiment of the invention provides comprises:
Receiver module: be used to receive the light signal to be transmitted of two-way different rates at least;
Transmission means change module: the transmission means that is used to change wherein at least one road light signal;
Sending module: be used for light signal after the change transmission means and the light signal of not changing transmission means are sent together by optical fiber.
The embodiment of the invention is passed through the adjustment to the running parameter of part light signal to be transmitted, the different rates light signal is mixed passing, and has strengthened the adaptability of optical-fiber network to institute's transmitting optical signal speed.
Description of drawings
The transmission method flow chart of a kind of light signal that Fig. 1 provides for the embodiment of the invention;
The transmission method flow chart of the another kind of light signal that Fig. 2 provides for the embodiment of the invention;
The transmitting device structural representation of a kind of light signal that Fig. 3 provides for the embodiment of the invention;
The transmitting device structural representation of the another kind of light signal that Fig. 4 provides for the embodiment of the invention;
The transmission system structural representation of the another kind of light signal that Fig. 5 provides for the embodiment of the invention;
The spectrogram that Fig. 6 adjusts for the upgrade frequency point that the embodiment of the invention provides;
The spectrogram that Fig. 7 adjusts for the degradation frequency that the embodiment of the invention provides.
Embodiment
Embodiments of the invention provide a kind of transmission method, device and system of light signal, below in conjunction with accompanying drawing the embodiment of the invention are elaborated.
As shown in Figure 1, the transmission method of a kind of light signal that the embodiment of the invention provides comprises the steps:
101: receive the light signal to be transmitted of two-way different rates at least;
102: the transmission means of wherein at least one road of change light signal;
103: will change light signal and the light signal of not changing transmission means after the transmission means, and send together by optical fiber.
As shown in Figure 2, the transmission method of the another kind of light signal that the embodiment of the invention provides comprises the steps:
201, obtain the signal parameter of light signal to be transmitted; This step at first issues the monitoring point configuration information earlier by system when carrying out, the monitoring point is set; Then, collect the signal parameter of the light signal at place, monitoring point.As shown in Figure 5, be provided with six different monitoring points, be used to monitor the performance of main optical path and discrete wavelength passage, can carry out the supervision of each performance parameter with equipment.Wherein,
The performance parameter that optical property monitoring point 1 can monitor has:
1) the output gross power of main optical path;
2) power output of image intensifer (perhaps light amplification gain);
3) power output of each wavelength after amplifying;
4) OSNR of each wavelength;
The performance parameter that optical property monitoring point 2 can monitor has:
1) the input gross power of main optical path;
2) the wavelength power (optional) before pre-the amplification;
The performance parameter that optical property monitoring point 3 can monitor has: the wavelet band power before amplifying;
The performance parameter that optical property monitoring point 4 can monitor has: the wavelet band power (optional) behind pre-the amplification;
The performance parameter that optical property monitoring point 5 can monitor has: the wavelength power after the transmission;
The performance parameter that optical property monitoring point 6 can monitor has: the wavelength power before receiving.
Signal parameter for example comprises: through-put power, optical signal quality parameter, bit error code parameter, fiber-optic signal impairment parameter, the light amplifier gain parameter of the light signal at the modulation format of transmitting optical signal, the exchange capacity of network element and place, monitoring point.Further, collect the process of signal, the time of the signal parameter of collecting transmitting optical signal can be set; According to the time is set, regularly collect the signal parameter of transmitting optical signal.Like this, can monitor the signal parameter of transmitting optical signal more accurately and effectively.Above-mentioned signal parameter is to collect acquisition by the light signal at place, monitoring point, in other embodiments, can also be provided with or revise by network management system or network manager.
202, receive the light signal to be transmitted of two-way different rates at least; This step according to the signal parameter that gets access to, is discerned the wavestrip of transmitting optical signal; Operation result by the signal parameter computing is obtained is light signal distribution frequency spectrum resource; Thereby obtain the transmission parameter that is complementary with transmitting optical signal.Transmission parameter comprises: modulation format, transmission window, transmission channel, spectrum intervals, passage luminous power and light amplifier gain.The signal parameter that above-mentioned basis is collected can also be calculated the passage luminous power of each transmitting optical signal in conjunction with the distance of network topology and circuit by the parameter computing.Network topology and circuit distance can obtain by the agreement of existing network, can also be provided with by the network manager, and the parameter mathematical algorithm can adopt four step rule, can also adopt other method.
203, the transmission means of wherein at least one road of change light signal; The transmission parameter of this step by being complementary with transmitting optical signal in the operation result in the above-mentioned steps reset the transmission means of transmitting optical signal.Transmission means comprises the work centre frequency in the present embodiment.Can also comprise the passage luminous power of transmitting optical signal, the coded system of light signal to be transmitted.Those skilled in the art should be understood that by the change coded system can change transmission rate, therefore in other embodiments, also can be to change coded system and do not change the mixed biography that the work centre frequency is realized the different rates signal, and perhaps the two combines.For convenience of description, only be described below in the mode of changing center frequency point.
For example: as shown in Figure 6, in the system of a 10Gbps, the adjacent wavelength of eight 25G spectrum widths is operated in 195.675,195.700,195.725,195.750,195.775,195.800,195.825 respectively, the 195.850THz center frequency point, the wavelength of a 40Gbps speed will be inserted in the position of former λ 3 and λ 4 now.Because this 40Gbps wavelength need be operated in the 50G spectrum width, then work centre frequency adjustment subelement can be according to the frequency central point 195.7875THz of control unit or network management system setting, it is the 195.7875THz place that the light signal of 40Gbps wavelength is adjusted to the frequency central point by frequency shifter, and the 40Gbps wavelength will be operated in this center frequency point.In addition, increase wavelength density if desired, for example: as shown in Figure 7, originally the adjacent wavelength of 50GHz spectrum width be operated in 195.70,195.75,195.80 respectively, the 195.85THz center frequency point, to change one of them into 25GHz now, increase the light signal of two 10Gbps speed wavelength thus.Then can the focus of work frequency of the light signal of two transmission rates wavelength that is 10Gbps be moved on to 195.8125THz and 195.7875THz respectively by frequency shifter.
204, adjust the work centre frequency of transmitting optical signal and the coded system of luminous power or light signal to be transmitted; This step is adjusted transmitting optical signal according to the work centre frequency in the transmission means of resetting in the step 203; Passage luminous power according to the transmitting optical signal in the transmission means of resetting in the step 203 is adjusted transmitting optical signal; Coded system according to the light signal to be transmitted in the transmission means of resetting in the step 203 is adjusted transmitting optical signal;
205, will change light signal and the light signal of not changing transmission means after the transmission means, send together by optical fiber.
As shown in Figure 3, the transmitting device of a kind of light signal that the embodiment of the invention provides, this device comprises as lower unit:
Receiver module: be used to receive the light signal to be transmitted of two-way different rates at least;
Transmission means change module: the transmission means that is used to change wherein at least one road light signal;
Sending module: be used for light signal after the change transmission means and the light signal of not changing transmission means are sent together by optical fiber.
As shown in Figure 4, the transmitting device of the another kind of light signal that the embodiment of the invention provides, this device comprises as lower module: receiver module, transmission means change module, sending module; Further comprise:
Wavestrip identification module: the wavestrip that is used to discern described light signal to be transmitted;
Frequency spectrum resource distribution module: be used to described light signal to be transmitted to distribute frequency spectrum resource;
Transmission parameter matching module: be used for signal parameter, for light signal to be transmitted mates corresponding transmission parameter according to described light signal to be transmitted.Transmission parameter comprises: modulation format, transmission window, transmission channel, spectrum intervals, passage luminous power and light amplifier gain.
Signal parameter acquisition module: be used to obtain described signal parameter; This unit specifically comprises:
The monitoring point is provided with the unit: be used for according to the monitoring point configuration information monitoring point being set; This unit can determine that needing the position of monitoring is the monitoring point by issuing the monitoring point configuration information; The monitoring point configuration information comprises: the light slogan of wiring board, main optical path number, discrete wavelength channel number.As shown in Figure 5, be provided with six different monitoring points, be used to monitor the performance of main optical path and discrete wavelength passage, can carry out the supervision of each performance parameter with equipment.Wherein,
The performance parameter that optical property monitoring point 1 can monitor has:
1) the output gross power of main optical path;
2) power output of image intensifer (perhaps light amplification gain);
3) power output of each wavelength after amplifying;
4) OSNR of each wavelength;
The performance parameter that optical property monitoring point 2 can monitor has:
1) the input gross power of main optical path;
2) the wavelength power (optional) before pre-the amplification;
The performance parameter that optical property monitoring point 3 can monitor has: the wavelet band power before amplifying;
The performance parameter that optical property monitoring point 4 can monitor has: the wavelet band power (optional) behind pre-the amplification;
The performance parameter that optical property monitoring point 5 can monitor has: the wavelength power after the transmission;
The performance parameter that optical property monitoring point 6 can monitor has: the wavelength power before receiving.
Signal parameter acquiring unit: the signal parameter that is used to obtain the transmitting optical signal of locating described monitoring point.
Wherein, described transmission means change module comprises:
The center frequency point adjustment unit: be used for the center frequency point of described at least one road light signal is adjusted, wherein, and described center frequency point value, the spectrum width of the light signal that former setting is transmitted according to optical fiber, and the frequency spectrum broadband of at least one road light signal is determined.
The coded system adjustment unit: be used to change the coded system of wherein at least one road light signal to be transmitted, wherein, described coded system is determined according to the transmission rate of described at least one road light signal.
Passage optical power value determining unit: be used for signal parameter, determine to need to change the photo-signal channel optical power value of transmission means according to described light signal to be transmitted;
The optical power adjusting unit of passage: be used for according to described passage optical power value, the luminous power of the passage of described at least one road light signal is adjusted.
Described signal parameter acquiring unit also comprises:
Time is provided with subelement: the time that is used to be provided with the signal parameter of collecting transmitting optical signal;
Signal parameter is collected subelement: be used for regularly collecting the signal parameter of transmitting optical signal according to the time is set.
As shown in Figure 5, the transmission system of a kind of light signal that the embodiment of the invention provides, this system comprises:
Light receiving unit, light branch/close ripple unit, light transmitting element and control unit.Optical Amplifier Unit and light cross unit can also be selected to use by this system; Wherein,
Light receiving unit can comprise:
DSP (Digital Signal Processing, Digital Signal Processing) subelement: the nonlinearity erron that is used to eliminate light signal.
Because receiving element receives the light signal that the wavelength of different rates interleaves, and can cause the nonlinear effect on the optical fiber more serious,, need in light receiving unit, can design a suitable DSP algorithm so eliminate nonlinear effect.Thereby the DSP subelement of light receiving unit can be used to solve different wave length interleaves the nonlinear problem that light signal causes.
Light branch/close the ripple unit: be used for wavelength optical signals is carried out demultiplexing or multiplexing; This unit can carry out the expansion of frequency range, thereby can hold more wavelength.Light branch/close the ripple unit can send to the light signal of different velocity of wave wavelength the different receiving ports of light receiving unit by demultiplexing; Perhaps light branch/close the ripple unit can receive the light signal from the different velocities of wave of the transmitting element of not sharing the same light in the future, and it is recovered usefulness;
The light transmitting element can comprise:
The center frequency point adjustment unit: be used for the center frequency point of described at least one road light signal is adjusted, wherein, and described center frequency point value, the spectrum width of the light signal that former setting is transmitted according to optical fiber, and the frequency spectrum broadband of at least one road light signal is determined; The main performer of center frequency point adjustment unit can be a frequency shifter.G.694.1 the parameter setting of frequency shifter needs reference, but in embodiments of the present invention, G.694.1 the value of wavelengths centered frequency is not strict follows, because at different rates and different spectral after the light signal of wavelength is inserted in the light signal of intrinsic wavelength at interval, intrinsic spectrum width can be adjusted, need be that the light signal that will insert calculates new work centre frequency, and the light signal of the wavelength that will transmit be moved on to new central task frequency by frequency shifter.
The center frequency point adjustment unit carries out the adjustment of light signal central task frequency according to the parameter of control unit or the setting of other management systems.For example: as shown in Figure 6, in the system of a 10Gbps, the adjacent wavelength of eight 25G spectrum widths is operated in 195.675,195.700,195.725,195.750,195.775,195.800,195.825 respectively, the 195.850THz center frequency point, the wavelength of a 40Gbps speed will be inserted in the position of former λ 3 and λ 4 now.Because this 40Gbps wavelength need be operated in the 50G spectrum width, then work centre frequency adjustment subelement can be according to the frequency central point 195.7875THz of control unit or network management system setting, it is the 195.7875THz place that the light signal of 40Gbps wavelength is adjusted to the frequency central point by frequency shifter, and the 40Gbps wavelength will be operated in this center frequency point.In addition, increase wavelength density if desired, for example: as shown in Figure 7, originally the adjacent wavelength of 50GHz spectrum width be operated in 195.70,195.75,195.80 respectively, the 195.85THz center frequency point, to change one of them into 25GHz now, increase the light signal of two 10Gbps speed wavelength thus.Then can the focus of work frequency of the light signal of two transmission rates wavelength that is 10Gbps be moved on to 195.8125THz and 195.7875THz respectively by frequency shifter.
Above-mentioned example is by changing the light signal insertion intrinsic light signal of spectrum intervals with the wavelength of different velocities of wave; In actual applications, also can be under the situation that does not change spectrum intervals, by upgrading or reducing mixed biography of wavelength that some existing light signal speed realizes different rates.At this moment, frequency shifter is adjusted according to the value of frequency point of acquiescence, and reality frequency does not take place changes.As: be transmitted as example according to 10Gbps and 40Gbps light signal are mixed, have following situation:
10Gbps works in the 50GHz frequency interval, and 40Gbps works in the 100GHz frequency interval; When the light signal that works in the 100GHz frequency interval as 40Gbps need transmit by the photo-signal channel that 10Gbps works in the 50GHz frequency interval, can be that the light signal of 10Gbps, 40Gbps all works in the 50GHz frequency interval with transmission rate by different modulation systems, the light signal of different rates can insert at interval; Also can combination in any insert.
The mixed transport of 100Gbps and 40Gbps, 10Gbps light signal also has above-mentioned similar situation, the combination in any that comprises the light signal of 100Gbps, 40Gbps under the 50GHz spectrum intervals, 10Gbps velocity of wave, by that analogy, different velocity of wave light signals can make up arbitrarily under 25G, 50G, 100G interval.
The optical power adjusting unit of passage: the passage luminous power that is used to adjust transmitting optical signal.
This unit can be adjusted respectively according to set point the luminous power of single wavelength light signal by the adjustable optical attenuator of each wavelength light signal, can strengthen or weaken.Set point is from control unit;
Control unit: be used to collect the signal parameter that obtains transmitting optical signal, by the parameter computing, for transmitting optical signal is provided with running parameter, the transmission of control transmission signal.
Control unit further can comprise:
Signal parameter acquiring unit: be used to collect the signal parameter that obtains transmitting optical signal; Signal parameter comprises: transmitted power, optical signal quality parameter, bit error code parameter, fiber-optic signal impairment parameter (chromatic dispersion, polarization mode dispersion, nonlinear effect), the light amplifier gain parameter of the light signal at the modulation format of transmitting optical signal, the exchange capacity of network element and place, monitoring point.Wherein, optical signal quality parameter comprises: OSNR (OpticalSignal-to-Noise Rato, Optical Signal To Noise Ratio), optical power attenuation; The fiber-optic signal impairment parameter comprises: PMD (Polarization Mode Dispersion, polarization mode dispersion), nonlinear effect, chromatic dispersion, CD Slope (Chromatic Dispersion Slope, dispersion slope); The light amplifier gain parameter comprises: Raman gain, Raman noise, EDFA (Er-doped Fiber Amplifier, erbium-doped fiber amplifier) gain, EDFA noise.
Parameter arithmetic element: be used for according to signal parameter, carry out the parameter computing, obtain operation result; This unit according to signal parameter and light signal place topology of networks and transmission range, need on each optical channel can to obtain the luminous power set and work centre frequency of every kind of light signal or the like by corresponding algorithm.Corresponding these parameters are collected by control unit, and leave in the database and network management data storehouse of network element.When data had renewal, algorithm was understood corresponding operation once, for example: new adjustable optical attenuator set point is calculated, be stored in the adjustable optical attenuator parameter list of ONE (Optical Network Element, network element) database.
The parameter arithmetic element further can comprise:
Wavestrip recognin unit: the wavestrip that is used to discern transmitting optical signal;
Frequency spectrum resource distributes subelement: be used to light signal to distribute frequency spectrum resource;
Transmission parameter coupling subelement: be used for according to signal parameter, for light signal mates corresponding transmission parameter.
Transmission means change unit: be used for according to operation result, the running parameter of transmitting optical signal is set.
Control unit can also comprise:
Time is provided with subelement: the time that is used to be provided with the signal parameter of collecting transmitting optical signal;
Signal parameter acquiring unit: be used for regularly collecting the signal parameter of transmitting optical signal according to the time is set.
Control unit can also comprise:
The monitoring point is provided with subelement: be used for according to the monitoring point configuration information monitoring point being set;
Signal parameter obtains subelement: the signal parameter that is used to collect the light signal of locating the monitoring point.
Optical Amplifier Unit: the light signal that is used to dock into Optical Amplifier Unit amplifies;
Light cross unit: be used for the wavelength optical signals of demultiplexing is crossed to different receiving ports.
The system of the transmitting optical signal that provides based on the invention described above embodiment contains following five kinds of application scenarioss:
1) system of the wavelength division multiplexing mixed transport light signal of no Optical Amplifier Unit
Circuit is descending: the multiple wavelength optical signal of circuit main optical path enters Optical Demultiplexing Unit, with wavelength (de) multiplexing, enter the light cross unit then wavelength optical signals is crossed to different ports, enter into different light receiving units again, carry out the reception of light signal according to different modulation formats.
Branch road is up: the branch road light signal is modulated according to certain modulation format by the modulating unit in the light transmitting element, the work centre frequency adjustment subelement that enters then in the light transmitting element carries out the adjustment of light signal work centre frequency according to the center frequency point of control unit setting, enter the optical power adjustment subelement again and carry out the adjustment of luminous power according to the power budget value of control unit setting, enter the different port that the light cross unit is crossed to connection line again, different wave length on the same circuit (main optical path) carries out multiplexing at Optical Multiplexer Unit, entry-line transmits again.
2) band light amplification wavelength division multiplexing mixed transport light signal system (WDM, ROADM)
Circuit is descending: the multiple wavelength optical signal of circuit main optical path enters Optical Amplifier Unit and amplifies, and then enter Optical Demultiplexing Unit, wavelength optical signals is carried out demultiplexing, enter the light cross unit then wavelength optical signals is crossed to different ports, different port enters different light receiving units again, carries out the reception of light signal according to different modulation formats.
Branch road is up: the branch road light signal is modulated according to certain modulation format by the modulating unit in the light transmitting element; Modulation format, comprise: (N) RZ-OOK ((Non)-Return-to-Zero On-Off-Keying, (non-) on-off keying that makes zero), ODB (Optical Duobinary, the optical duo-binary sign indicating number), DQPSK (Differential Quadrature Phase Shift Keying, differential quadrature phase keying (DQPSK)), RZ-DQPSK (Return to Zero-Differential Quadrature Phase Shift Keying, differential quadrature phase keying (DQPSK) makes zero).Then, the work centre frequency adjustment subelement that enters in the light transmitting element carries out the adjustment of wavelength work centre frequency according to the center frequency point of control unit setting, enter the optical power adjustment subelement again and carry out the adjustment of luminous power according to the power budget value of control unit setting, enter the different port that the light cross unit is crossed to connection line again, same circuit is that the different wave length on the main optical path carries out multiplexing at Optical Multiplexer Unit, enter Optical Amplifier Unit again and amplify, last entry-line transmits.
3) system of the wavelength division multiplexing mixed transport light signal of band Optical Amplifier Unit, unglazed cross unit
Circuit is descending: the multiple wavelength optical signal of circuit main optical path enters Optical Amplifier Unit and amplifies, and then enter Optical Demultiplexing Unit, wavelength optical signals is carried out demultiplexing, enter different light receiving units then, carry out the reception of light signal according to different modulation formats.
Branch road is up: the branch road light signal is modulated according to certain modulation format by the modulating unit in the light transmitting element, the work centre frequency adjustment subelement that enters then in the light transmitting element carries out the adjustment of wavelength work centre frequency according to the center frequency point of control unit setting, enter the optical power adjustment subelement again and carry out the adjustment of luminous power, enter Optical Multiplexer Unit again according to the power budget value of control unit setting; It is multiplexing that same circuit is that the different wave length on the main optical path carries out at Optical Multiplexer Unit, enters Optical Amplifier Unit again and amplify, and last entry-line transmits.
4) system of the wavelength division multiplexing mixed transport light signal of the unglazed cross unit of no Optical Amplifier Unit
Circuit is descending: the multiple wavelength optical signal of circuit main optical path enters Optical Demultiplexing Unit, and wavelength optical signals is carried out demultiplexing, enters into different light receiving units again, carries out the reception of light signal according to different modulation formats.
Branch road is up: the branch road light signal is modulated according to certain modulation format by the modulating unit in the light transmitting element, the work centre frequency adjustment subelement that enters then in the light transmitting element carries out the adjustment of wavelength work centre frequency according to the center frequency point of control unit setting, enter the optical power adjustment subelement again and carry out the adjustment of luminous power, enter Optical Multiplexer Unit again according to the power budget value of control unit setting; It is multiplexing that same circuit is that the different wave length on the main optical path carries out at Optical Multiplexer Unit, and entry-line transmits again.
5) application scenarios that continues in the line of the system of wavelength division multiplexing mixed transport light signal
The light amplification process: the light signal on the main optical path enters Optical Amplifier Unit and amplifies, and continues transmission by circuit then.
Regenerative process: the light signal on the main optical path enters the light signal that Optical Demultiplexing Unit is isolated each wavelength, enters light receiving unit again and receives according to different modulation formats; Light receiving unit can be done the conversion of OEO (Optical-to-electrical-to-optical, light-electrical-optical), realizes the regeneration of signal on the circuit; And then be delivered to Optical Multiplexer Unit by the light transmitting element and close ripple, carrying out power amplification by Optical Amplifier Unit again, entry-line continues transmission then.
Above WDM (Wavelength Division Multiplexing, wavelength division multiplexing) system of mixed transport light signal also is applicable to the system of ROADM (Reconfigurable Optical Add-Drop Multiplexing, configurable OADM) mixed transport light signal.
The embodiment of the invention is by the adjustment to the running parameter of transmitting optical signal, with different rates and different frequency interval light signal adjust to appropriate running parameter and carry out mixed transport; Can only light signal be transmitted with single-rate and fixing spectrum intervals for the optical-fiber network of having built well with prior art and to compare, the embodiment of the invention can be carried out mixed transport with the light signal of multiple speed and frequency interval, like this, not only improve the information transfer efficiency of optical-fiber network, and improved bandwidth utilization.
The above; it only is the embodiment of the embodiment of the invention; but the protection range of the embodiment of the invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, the protection range of the embodiment of the invention should be as the criterion with the protection range of claim.
Claims (14)
1, a kind of transmission method of light signal is characterized in that, comprising:
Receive the light signal to be transmitted of two-way different rates at least;
The transmission means of wherein at least one road of change light signal;
With light signal after the change transmission means and the light signal of not changing transmission means, send together by optical fiber.
According to the transmission method of the described light signal of claim 1, it is characterized in that 2, the transmission means of wherein at least one road of described change light signal is specially:
Center frequency point to described at least one road light signal is adjusted, wherein, described center frequency point value, the spectrum width of the light signal that former setting is transmitted according to optical fiber, and the frequency spectrum broadband of at least one road light signal is determined.
According to the transmission method of the described light signal of claim 1, it is characterized in that 3, the transmission means of wherein at least one road of described change light signal is specially:
The coded system of wherein at least one road of change light signal to be transmitted, wherein, described coded system is determined according to the transmission rate of described at least one road light signal.
According to the transmission method of claim 1,2 or 3 described light signals, it is characterized in that 4, this method also comprises:
Discern the wavestrip of described light signal to be transmitted;
For described light signal to be transmitted distributes frequency spectrum resource;
According to the signal parameter of described light signal to be transmitted, for light signal to be transmitted mates corresponding transmission parameter.
According to the transmission method of the described light signal of claim 4, it is characterized in that 5, described transmission parameter comprises: modulation format, transmission window, transmission channel, spectrum intervals, passage luminous power and light amplifier gain.
According to the transmission method of claim 1 or 2 or 3 described light signals, it is characterized in that 6, this method further comprises:
According to the signal parameter of described light signal to be transmitted, determine to need to change the photo-signal channel optical power value of transmission means;
According to described passage optical power value, the luminous power of the passage of described at least one road light signal is adjusted.
According to the transmission method of the described light signal of claim 6, it is characterized in that 7, described signal parameter comprises:
The output gross power of main optical path; The power output of image intensifer; The power output of light signal after amplifying; The input gross power of the Optical Signal To Noise Ratio of light signal, main optical path, amplify preceding wavelet band power, the mass parameter of light signal to be transmitted, loss of signal parameter, fiber-optic signal impairment parameter, light amplification gain parameter, transmission range, transmitted power, bit error code parameter.
8, according to the transmission method of the described light signal of claim 6, it is characterized in that, described signal parameter according to described light signal to be transmitted, determining needs to change before the photo-signal channel optical power value of transmission means, further comprises and obtains described signal parameter; Specifically comprise:
According to the monitoring point configuration information, the monitoring point is set;
By the monitoring point is detected, obtain the signal parameter of transmitting optical signal.
9, a kind of transmitting device of light signal is characterized in that, comprising:
Receiver module: be used to receive the light signal to be transmitted of two-way different rates at least;
Transmission means change module: the transmission means that is used to change wherein at least one road light signal;
Sending module: be used for light signal after the change transmission means and the light signal of not changing transmission means are sent together by optical fiber.
According to the transmitting device of the described light signal of claim 9, it is characterized in that 10, described transmission means change module comprises:
The center frequency point adjustment unit: be used for the center frequency point of described at least one road light signal is adjusted, wherein, and described center frequency point value, the spectrum width of the light signal that former setting is transmitted according to optical fiber, and the frequency spectrum broadband of at least one road light signal is determined.
According to the transmitting device of the described light signal of claim 9, it is characterized in that 11, described transmission means change module comprises:
The coded system adjustment unit: be used to change the coded system of wherein at least one road light signal to be transmitted, wherein, described coded system is determined according to the transmission rate of described at least one road light signal.
According to the transmitting device of claim 9,10 or 11 described light signals, it is characterized in that 12, this device also comprises:
Wavestrip identification module: the wavestrip that is used to discern described light signal to be transmitted;
Frequency spectrum resource distribution module: be used to described light signal to be transmitted to distribute frequency spectrum resource;
Transmission parameter matching module: be used for signal parameter, for light signal to be transmitted mates corresponding transmission parameter according to described light signal to be transmitted.
According to the transmitting device of claim 9 or 10 or 11 described light signals, it is characterized in that 13, this installs described transmission means change module and further comprises:
Passage optical power value determining unit: be used for signal parameter, determine to need to change the photo-signal channel optical power value of transmission means according to described light signal to be transmitted;
The optical power adjusting unit of passage: be used for according to described passage optical power value, the luminous power of the passage of described at least one road light signal is adjusted.
According to the transmitting device of the described light signal of claim 13, it is characterized in that 14, this device further comprises:
Signal parameter acquisition module: be used to obtain described signal parameter; This unit specifically comprises:
The monitoring point is provided with the unit: be used for according to the monitoring point configuration information monitoring point being set;
Signal parameter acquiring unit: be used for obtaining the signal parameter of transmitting optical signal by the monitoring point is detected.
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| CN2008101101837A CN101605276B (en) | 2008-06-13 | 2008-06-13 | Method and device for transmitting optical signals |
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| CN2008101101837A CN101605276B (en) | 2008-06-13 | 2008-06-13 | Method and device for transmitting optical signals |
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| CN101605276B CN101605276B (en) | 2013-04-24 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102439994A (en) * | 2011-07-22 | 2012-05-02 | 华为技术有限公司 | Method and device for adjusting optical device filtering bandwidth |
| CN103178904A (en) * | 2013-03-26 | 2013-06-26 | 华中科技大学 | Passive optical access network for full-duplex high-speed single-fiber bidirectional wavelength multiplexing |
| CN103248970A (en) * | 2012-02-13 | 2013-08-14 | 中兴通讯股份有限公司 | Route flooding method and device, and path computing method and unit |
| CN104796215A (en) * | 2015-03-12 | 2015-07-22 | 苏州大学 | Method and device for improving optical network transmission efficiency |
| CN106105063B (en) * | 2014-03-06 | 2019-02-15 | 思科技术公司 | The optimization of light transmission capacity |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7113702B2 (en) * | 2001-08-06 | 2006-09-26 | Nippon Telegraph And Telephone Corporation | Wavelength division multiplexing optical transmission system and transmission method |
| CN100499436C (en) * | 2003-08-14 | 2009-06-10 | 华为技术有限公司 | Transmission method for realizing multi-port arbitrary rate integration |
| CN100477562C (en) * | 2005-08-04 | 2009-04-08 | 上海交通大学 | Method for monitoring optical signal in optical transmission system |
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2008
- 2008-06-13 CN CN2008101101837A patent/CN101605276B/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102439994A (en) * | 2011-07-22 | 2012-05-02 | 华为技术有限公司 | Method and device for adjusting optical device filtering bandwidth |
| CN102439994B (en) * | 2011-07-22 | 2013-11-06 | 华为技术有限公司 | Method and device for adjusting optical device filtering bandwidth |
| US8989594B2 (en) | 2011-07-22 | 2015-03-24 | Huawei Technologies Co., Ltd. | Method and device for adjusting filtering bandwidth of an optical device |
| CN103248970A (en) * | 2012-02-13 | 2013-08-14 | 中兴通讯股份有限公司 | Route flooding method and device, and path computing method and unit |
| WO2013120437A1 (en) * | 2012-02-13 | 2013-08-22 | 中兴通讯股份有限公司 | Route flooding method and device and path calculation method and path calculation unit |
| CN103248970B (en) * | 2012-02-13 | 2018-12-28 | 中兴通讯股份有限公司 | A kind of routing flooding method and device and path calculation method and path-calculating element |
| CN103178904A (en) * | 2013-03-26 | 2013-06-26 | 华中科技大学 | Passive optical access network for full-duplex high-speed single-fiber bidirectional wavelength multiplexing |
| CN103178904B (en) * | 2013-03-26 | 2016-12-28 | 华中科技大学 | Full-duplex high-speed single-fiber-optic two-way wavelength division multiplexing passive optical access network network |
| CN106105063B (en) * | 2014-03-06 | 2019-02-15 | 思科技术公司 | The optimization of light transmission capacity |
| CN104796215A (en) * | 2015-03-12 | 2015-07-22 | 苏州大学 | Method and device for improving optical network transmission efficiency |
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