CN101656589B - Method and device for optimizing DWDM network channel - Google Patents
Method and device for optimizing DWDM network channel Download PDFInfo
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- CN101656589B CN101656589B CN 200810147156 CN200810147156A CN101656589B CN 101656589 B CN101656589 B CN 101656589B CN 200810147156 CN200810147156 CN 200810147156 CN 200810147156 A CN200810147156 A CN 200810147156A CN 101656589 B CN101656589 B CN 101656589B
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Abstract
The embodiment of the invention discloses a method and a device for optimizing a DWDM network channel. The method comprises the following steps: A, when an optical power value in a wavelength channel does not reach a nominal power value, acquiring a difference value of the optical power value and the nominal power value; B, querying to obtain a regulating surplus of a power regulating point in the wavelength channel; C, judging whether the regulating surplus is not less than the different value, turning to step E if the regulating surplus is not less than the difference value, and turning to step D if the regulating surplus is less than the difference value; D, querying to obtain a regulating surplus of a next power regulating point in the wavelength channel, adding the regulating surplus in step C to the regulating surplus of the next power regulating point, taking the sum of the regulating surpluses as a new regulating surplus, and turning to step C; and E, regulating the optical power value of the wavelength channel to the nominal power value. The method provided by the embodiment of the invention can achieve the effect of saving time and labor, and improves system performance.
Description
Technical field
The present invention relates to communication field, relate in particular to the method and apparatus that a kind of DWDM network channel is optimized.
Background technology
Along with DWDM (Dense Wavelength-Division Multiplexing, dense wavelength division multiplexing) technology and EDFA (Erbium Doped Fiber Amplifier, erbium-doped fiber amplifier) the continuous progress of technology, the number of wavelengths that can transmit in the optical fiber is more and more, and the amount of information of transmission is also increasing.But because OSNR (the OSNR Optical Signal Noise Rate that EDFA optical signal amplifier self is introduced, Optical Signal To Noise Ratio), and the problem such as non-linear of the non-linear and optical fiber of EDFA optical signal amplifier gain itself, make the performance of each wavelength channel that transmits in the system constantly deteriorated, finally cause some wavelength channel OSNR on the receiver of receiving terminal not reach system requirements, serious error code occurs even RLOS (Receive Lost Of Signal, Received Loss Of Signal) occurred.As shown in Figure 1, gain curve for the EDFA optical signal amplifier, the EDFA optical signal amplifier is discrepant to the gain of each wavelength as we know from the figure, this can make and close the ripple signal through after the multistage amplification, excessive in the wavelength channel luminous power that receiving terminal has, and the wavelength channel luminous power that has is too small.Even use the flat gain technology, can not guarantee that the gain of all wavelengths is all consistent.
When the incident optical power of optical fiber is little, optical fiber presents linear character, yet along with the development of DWDM technology and EDFA technology, the light wave number that enters optical fiber is more and more, luminous power is also increasing, so the nonlinear characteristic of optical fiber has produced considerable influence to the performance of wavelength channel.
As shown in Figure 2, in the DWDM network, there are some power adjustments points, can regulate the luminous power of single wavelength channel, by the luminous power of adjusting wavelength channel, reach the purpose of optimization system performance.These power adjustments points can be at the transmitting terminal website, also can be in intermediate stations.Existing technology mainly is by manual mode single ripple channel light power to be regulated to reach the purpose of Optimal performance.
The inventor finds that there is following problem at least in prior art in realizing process of the present invention:
Prior art needs the optimization personnel that carry out Optimum Operation that optimization system is known quite well by manual mode optimization system performance, and needs in advance to calculate through planning first, repeatedly regulates again.Time-consuming, the effort of this mode, last optimum results also is difficult to reach perfect condition simultaneously.
Summary of the invention
The method and apparatus that the embodiment of the invention provides a kind of DWDM network channel to optimize can be optimized the performance of dwdm system faster, reach save time, the labour-saving effect, the performance of the raising system of maximum possible.
The method that the embodiment of the invention provides a kind of DWDM network channel to optimize comprises:
Steps A, when the optical power value in the wavelength channel does not reach nominal power rating, obtain the difference of described optical power value and described nominal power rating;
Step B, inquiry obtain the adjusting surplus of a power adjustments point in the described wavelength channel;
Step C, judgement are regulated surplus and whether are not less than described difference; If be not less than described difference, change step e over to; If less than described difference, change step D over to;
Step D, inquiry obtain the adjusting surplus of next power adjustments point in the described wavelength channel, with the adjusting surplus addition of the adjusting surplus among the step C and described next power adjustments point, and will regulate surplus and as new adjusting surplus, change step C over to;
Step e, the optical power value of described wavelength channel is adjusted to described nominal power rating.
The method that the embodiment of the invention also provides a kind of DWDM network channel to optimize comprises:
When the optical power value in the wavelength channel does not reach nominal power rating, obtain the difference of described optical power value and described nominal power rating;
Judge the adjusting surplus of all power adjustments points in the described wavelength channel and whether be not less than described difference;
If be not less than described difference, regulate any or a plurality of power adjustments point in the described wavelength channel, the optical power value of described wavelength channel is adjusted to described nominal power rating.
Simultaneously, the device that the embodiment of the invention provides a kind of DWDM network channel to optimize comprises:
Difference calculating module is used for calculating the difference of described optical power value and described nominal power rating when the optical power value of wavelength channel does not reach nominal power rating;
Enquiry module is used for the adjusting surplus that inquiry obtains a power adjustments point of described wavelength channel;
Judge module is used for judging whether regulate surplus is not less than described difference; If be not less than, then send described adjusting surplus to adjustment module; If less than, then send described adjusting surplus to accumulator module;
Accumulator module, be used for receiving the adjusting surplus of the next power adjustments point of described wavelength channel that obtains by described enquiry module, with the adjusting surplus addition that is sent to from described judge module, adjusted surplus and, and will regulate surplus and as new adjusting surplus, send to described judge module;
Adjustment module is used for the adjusting surplus that sends according to from described judge module, and the optical power value of described wavelength channel is adjusted to described nominal power rating.
The device that the embodiment of the invention also provides a kind of DWDM network channel to optimize comprises:
Difference calculating module is used for calculating the difference of described optical power value and described nominal power rating when the optical power value of wavelength channel does not reach nominal power rating;
Enquiry module is used for inquiry and obtains the adjusting surplus sum of described all power adjustments points of wavelength channel, and is sent to judge module;
Judge module is used for judging whether described adjusting surplus sum is not less than described difference; If be not less than, then send described adjusting surplus sum to adjustment module;
Adjustment module is used for regulating at least one power adjustments point in the described wavelength channel according to described adjusting surplus sum, and the optical power value of described wavelength channel is adjusted to described nominal power rating.
Compared with prior art, the embodiment of the invention has the following advantages:
By such scheme, can optimize faster the performance of dwdm system, reach save time, the labour-saving effect, the performance of the raising system of maximum possible.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the gain curve of EDFA optical signal amplifier in the prior art;
Fig. 2 is DWDM network diagram in the prior art;
Fig. 3 is the method flow diagram that the DWDM network channel is optimized in the embodiment of the invention;
Fig. 4 is the method flow diagram that the DWDM network channel is optimized in further embodiment of this invention;
Fig. 5 is the method flow diagram that the DWDM network channel is optimized in further embodiment of this invention;
Fig. 6 to Figure 13 is segmentation situation schematic diagram in the embodiment of the invention;
Figure 14 is the flow chart of optimizing the error rate in the embodiment of the invention;
Figure 15 is the device schematic diagram that the DWDM network channel is optimized in the embodiment of the invention;
Figure 16 is the device schematic diagram that the DWDM network channel is optimized in further embodiment of this invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The method and apparatus that the embodiment of the invention provides a kind of DWDM network channel to optimize can carry out balance optimizing by the luminous power to each wavelength channel, can effectively increase the transmission range of system.On the basis of balance optimizing, the luminous power of wavelength channel is finely tuned simultaneously, make each wavelength channel reach optimum in the performance of receiving terminal.
The method and apparatus of the DWDM network channel optimization that the embodiment of the invention is provided below in conjunction with the drawings and specific embodiments is elaborated.
The method that the embodiment of the invention provides a kind of DWDM network channel to optimize as shown in Figure 3, comprising:
Step s301, when the optical power value in the wavelength channel does not reach nominal power rating, obtain the difference of described optical power value and described nominal power rating; When the optical power value in the wavelength channel does not reach nominal power rating, obtain the difference of described optical power value and described nominal power rating; Concrete, obtain the optical power value of this wavelength channel at first test point place of wavelength channel, should value and nominal power rating make comparisons, if do not reach (being greater than or less than) nominal power rating, then calculate the amount that both difference is regulated as needs; Wherein nominal power rating is EDFA optical signal amplifier nominal power rating.
Step s302, inquiry obtain the adjusting surplus of a power adjustments point in the described wavelength channel;
Step s303, judgement are regulated surplus and whether are not less than described difference; If be not less than described difference, change step s305 over to; If less than described difference, change step s304 over to;
Step s304, inquiry obtain the adjusting surplus of next power adjustments point in the described wavelength channel, adjusting surplus addition with the adjusting surplus among the step s303 and described next power adjustments point, and will regulate surplus and as new adjusting surplus, change step s303 over to;
Step s305, the optical power value of described wavelength channel is adjusted to described nominal power rating.
The process that above-mentioned steps realizes is specially: whether the adjusting surplus of judging first power adjustments point in the wavelength channel is not less than above-mentioned difference; If be not less than above-mentioned difference, regulate first power adjustments point and make the optical power value of wavelength channel be adjusted to nominal power rating; If less than above-mentioned difference, with the adjusting surplus of second power adjustments point and the adjusting surplus addition of first power adjustments point, and judge and regulate surplus and whether be not less than above-mentioned difference; If be not less than above-mentioned difference, the optical power value of wavelength channel is adjusted to nominal power rating; If still less than above-mentioned difference, repeated obtain power adjustments point is until be adjusted to nominal power rating with the optical power value of wavelength channel.
The method that the embodiment of the invention also provides a kind of DWDM network channel to optimize as shown in Figure 4, comprising:
Step s401, when the optical power value in the wavelength channel does not reach nominal power rating, obtain the difference of described optical power value and described nominal power rating;
Step s402, judge the adjusting surplus of all power adjustments points in the described wavelength channel and whether be not less than described difference; When having a plurality of power adjustments point in the wavelength channel, with the adjusting surplus addition of all power adjustments points, and compare with above-mentioned difference, when regulating surplus and during less than above-mentioned difference, the luminous power in this wavelength channel not being regulated.
If step s403 is not less than described difference, regulate any or a plurality of power adjustments point in the described wavelength channel, the optical power value of described wavelength channel is adjusted to described nominal power rating.
When the adjusting surplus of all power adjustments points in the wavelength channel with when being not less than the difference of optical power value and nominal power rating, the optical power value that this wavelength channel is described can be adjusted to nominal power rating, and can regulate one or more power adjustments points this moment makes optical power value reach nominal power rating; When the adjusting surplus of a certain power adjustments point is not less than above-mentioned difference, can only regulate this power adjustments point; Can certainly in all power adjustments points, choose a plurality of adjusting surpluses wantonly and regulate with the power adjustments point that is not less than above-mentioned difference, when regulating a plurality of power adjustments point, can adopt mode or other modes of dividing equally above-mentioned difference to realize.
Above-mentioned steps can save time by increasing corresponding caller realization in system, reaching, the labour-saving effect, the performance of the raising system of maximum possible.After wavelength channel being carried out the optimization of luminous power, can also further optimize the error rate in the wavelength channel, power adjustments point can be regulated to either direction when optimizing the error rate, and whether the detection error rate diminishes; If the described error rate diminishes, judge whether the error rate of all the other light waves in the wavelength channel becomes large; If become large, to other direction regulating power point of adjustment; If do not become large, continue to regulate described power adjustments point.
The optimization method of a kind of DWDM network channel that the embodiment of the invention is provided below by specific embodiment is elaborated, and as shown in Figure 5, comprising:
Step s501, inquiry EDFA optical signal amplifier nominal power rating;
Step s502, obtain the optical power value of wavelength channel medium wavelength at first test point place;
Step s503, detect this optical power value and whether reach nominal power rating; If reach nominal power rating, then finish balance optimizing; If do not reach nominal power rating, execution in step s504 then;
Step s504, according to EDFA optical signal amplifier nominal power rating and this optical power value, calculate the quantity of power need to regulate at power adjustments point place; This regulated quantity is the difference of optical power value and nominal power rating.
Step s505, obtain in the wavelength channel first power adjustments point as current point of adjustment, and judge whether current point of adjustment has enough adjusting surpluses; If have enough adjusting surpluses, regulate current point of adjustment and make luminous power reach nominal power rating and end adjusting; If do not have enough adjusting surpluses, execution in step s506;
Step s506, obtain the adjusting surplus of next power adjustments point, and with the adjusting surplus addition of current power point of adjustment, and then judge whether to have enough adjusting surpluses.If have enough adjusting surpluses, execution in step s507; If do not have enough adjusting surpluses, execution in step s508;
Step s507, the adjusting surplus of a upper power adjustments point is set to zero, regulate again the current power point of adjustment and make luminous power reach nominal power rating and finish to regulate;
If step s508 does not have enough adjusting surpluses, next power adjustments point as current point of adjustment, is continued to carry out this step s506, until above-mentioned optical power value is adjusted to nominal power rating.
Because the path of a wavelength process may exist a plurality of power adjustments points and test point, so need to carry out segmentation pathway section to the path of wavelength process, then each route segment is carried out optical power adjustment.The power adjustments point can be external or built-in electric adjustable optical attenuator, and test point can use spectroscopy unit, is used for the luminous power of closing each single ripple of ripple signal and the signal to noise ratio OSNR of scanning EDFA optical signal amplifier output.Comprise following several situation during segmentation:
(1) transmitting terminal has the power adjustments point, and receiving terminal has test point
As shown in Figure 6, the transmitting terminal in the path of wavelength channel process has the power point of adjustment, receiving terminal has test point, the path intermediate stations does not have point of adjustment and test point, this path is as a route segment, the point of adjustment of transmitting terminal is as the point of adjustment of this route segment, and the test point of receiving terminal is as the test point of this route segment.
(2) any one or a plurality of website have the power adjustments point in the middle of, and receiving terminal has test point
As shown in Figure 7, the transmitting terminal in the path of wavelength channel process does not have the power adjustments point, middle any one or a plurality of website have power adjustments point but do not have test point, receiving terminal has test point, this path is as a route segment, the power adjustments point that middle any one or a plurality of website have is as the power adjustments point of this route segment, and the test point of receiving terminal is as the test point of this route segment.
(3) transmitting terminal and middle any one or a plurality of website all have the power adjustments point, and receiving terminal has test point
As shown in Figure 8, the path transmitting terminal of wavelength channel process has the power adjustments point, middle any one or a plurality of website also have the power point of adjustment but do not have test point, receiving terminal has test point, this path is as a route segment, the power adjustments point of transmitting terminal and middle any one or a plurality of websites is as the point of adjustment of this route segment, with the test point of the receiving terminal test point as this route segment.
(4) transmitting terminal and middle arbitrarily website do not have the power adjustments point, and receiving terminal has test point
As shown in Figure 9, the path transmitting terminal of wavelength channel process does not have the power adjustments point, and middle arbitrarily website does not have power adjustments point and test point yet, and receiving terminal has test point, and this channel is unadjustable, and is not adjusted.
(5) transmitting terminal or middle any one or a plurality of website have the power adjustments point, and middle arbitrarily website and receiving terminal do not have test point
As shown in figure 10, the transmitting terminal in the path of wavelength channel process or middle any one or a plurality of website have the power adjustments point, and middle arbitrarily website and receiving terminal do not have test point, and this channel can't detect, and is not adjusted.
(6) any one or a plurality of website have test point in the middle of, and receiving terminal does not have test point
As shown in figure 11, the transmitting terminal in the path of wavelength channel process has point of adjustment, middle any one or a plurality of website have test point, middle last website with test point does not have test point to all websites between the receiving terminal, take middle last website with test point as boundary the path is divided into two parts, transmitting terminal to middle last have part between the website of test point as a route segment, the part of back is not regulated.
(7) any one or a plurality of website have test point in the middle of, and middle last website with test point does not have later on the power adjustments point
As shown in figure 12, any one or a plurality of website have test point in the middle of the path of wavelength channel process, middle last website with test point so ignore the test point that this intermediate stations has, is rethought segmentation according to other principles to there not being the power adjustments point between the receiving terminal.
(8) any one or a plurality of website have test point in the middle of, and middle last intermediate stations that has after the website of test point has the power adjustments point, and receiving terminal has test point
As shown in figure 13, any one or a plurality of website have test point in the middle of the path of wavelength channel process, middle last website with test point has the power adjustments point to the intermediate stations between the receiving terminal, last website with test point is that the boundary is divided into two parts with the path from the centre, and these two parts still carry out segmentation according to other principles in path.
According to above-mentioned segment processing to wavelength path, each route segment is carried out the optimization of luminous power, can avoid optimizing nonadjustable route segment, and make optimization more reasonable.
For the route segment with a plurality of power adjustments points, can optical power value be adjusted to nominal power rating according to above-mentioned steps, if transmitting terminal and intermediate stations all have the power adjustments point in route segment, then preferentially regulate transmitting terminal power adjustments point; If not having the power adjustments point of power adjustments point or transmitting terminal, transmitting terminal do not regulate surplus, the power adjustments point of an acquisition approach Duan Zhongyi intermediate stations is regulated, when the middle tone node is not regulated surplus yet, continue to obtain next power adjustments point, maybe regulate power adjustments points all in this path complete fully until optical power value is transferred to nominal power rating.
The method that certain above-described embodiment provides is a kind of mode of balance optimizing luminous power, can carry out based on the above method in actual applications the improvement on the step or adjust the order of execution in step, as before the regulating power point of adjustment, can detect in advance the quantity of power adjustments point in this route segment, as long as guarantee the adjusting through above-mentioned a plurality of power adjustments points, optical power value reaches as much as possible or gets final product near nominal power rating, do not limit the amount that each optical power adjusting node is regulated, namely regulated quantity all can be assigned to each power adjustments point, also can not divided equally.If each power adjustments point does not have the adjusting surplus in the route segment, and this moment wavelength channel luminous power still can't be transferred to nominal power rating, then do not consider this wavelength when signal to noise ratio OSNR is carried out balance optimizing following.
When by above-mentioned steps luminous power being carried out balance optimizing, each test point has corresponding power adjustments point in each route segment, and several wavelength may pass through identical test point.Travel through from front to back the test point of each route segment in the wavelength path, regulate power adjustments point corresponding to this test point, make wavelength channel reach nominal power rating in the luminous power of this test point as far as possible.
The top adjustment process of process can make through reaching of the luminous power maximum possible of each wavelength channel of equal-wattage point of adjustment balanced.For uncared-for in the previous segment process and do not regulate the part test point here do not consider.
Except luminous power in the wavelength channel is carried out the balance optimizing, also need signal to noise ratio OSNR is carried out balance optimizing, can regulate according to the method for regulating optical power the signal to noise ratio OSNR of each wavelength channel during optimization, make the flatness through the OSNR of each wavelength channel of same detection point reach requirement of system design.
The adjusting target of signal to noise ratio OSNR is: make to reach OSNR mean value through the OSNR of the light wave of all wavelengths of same detection point, can't be transferred to the wavelength of nominal power rating to luminous power in above-described embodiment and no longer regulate, also the OSNR adding of this wavelength channel not calculated when calculating OSNR mean value.
The adjusting of OSNR is final or reach the equilibrium of the luminous power that mixes up before the equilibrium of all OSNR can destroy by regulating optical power.Generally speaking, light power equalization has regulated OSNR and also can be good at equilibrium, but when in particular cases OSNR does not meet design requirement behind the light power equalization, need to pay the utmost attention to the equilibrium of OSNR, the equilibrium that can sacrifice in case of necessity luminous power reaches the equilibrium of OSNR, but the luminous power flatness can not surpass requirement of system design.So in the process of regulating the OSNR equilibrium, need to check the flatness of luminous power, make flatness OSNR in requirement of system design of luminous power as far as possible smooth.
Utilize FEC (Forward Error Correction, forward direction error code correction) function that BER (Bit ErrorRatio, the error rate) is carried out the error correction fine setting, reduce the error rate in the wavelength channel.Through on receiver, may also having error code to the light power equalization optimization of wavelength with to the light wave in the balanced wavelength channel of OSNR, the FEC ability that can utilize the receiver of receiving terminal itself to have this moment, luminous power in the wavelength channel is finely tuned repeatedly, make the BER of receiving terminal reach minimum.To detect simultaneously the BER before the FEC error correction of light wave of other wavelength in the process that this light wave is regulated, guarantee that the light wave performance of other wavelength does not occur deteriorated.
Be in the situation of nominal power rating in optical power adjustment, when the error rate is optimized, as shown in figure 14, comprise:
Step s1401, obtain the power adjustments point in the path of wavelength light wave process, regulate this point of adjustment to a direction.Concrete, when the optical power value of wavelength channel is adjusted to nominal power rating, the power adjustments point in this route segment is regulated to either direction.
Whether the error rate that detects the light wave of this wavelength in the time of step s1402, adjusting diminishes; If diminish, execution in step s1403 then; If do not diminish, execution in step s1404 then;
Step s1403, judge whether the error rate of the light wave of other wavelength in the wavelength channel becomes large; If do not become large, then continue to regulate this power adjustments point to above-mentioned direction; If become large, then execution in step s1405;
Whether step s1404, inquiry have the record that this wavelength error rate diminishes; If have the record that the error rate diminishes, execution in step s1405; If do not have the record that the error rate diminishes, execution in step s1406;
Step s1405, judge whether to overregulate to the other direction of this power adjustments point; If overregulate, regulate execution in step s1402 to other direction; If overregulate, execution in step s1406;
Step s1406, judge whether to have next power adjustments point, if having next power adjustments point, execution in step s1401; If do not have next power adjustments point, finish adjustment process.
If do not have allocating power point of adjustment or test point in the wavelength channel, can't carry out light power equalization and signal to noise ratio OSNR equilibrium to wavelength channel, can directly carry out balance optimizing according to the FEC function to BER.
If the receiver of receiving terminal itself does not have the FEC function in the wavelength channel, can't utilize FEC that BER is optimized, the actual error rate that this moment can direct-detection wavelength channel receiving terminal is optimized with this BER that replaces utilizing FEC to carry out before the error correction.
Simultaneously, for the method that realizes that the embodiment of the invention provides, the device that the embodiment of the invention also provides a kind of DWDM network channel to optimize as shown in figure 15, comprising:
Said apparatus can also comprise:
Error rate adjustment module 1506 is used for when the optical power value of wavelength channel is adjusted to nominal power rating the power adjustments point in the route segment being regulated to either direction;
Whether error rate detection module 1507 is used for detecting the error rate and diminishing when described error rate adjustment module 1506 is regulated the error rate;
Error rate judge module 1508, be used for when described error rate detection module 1507 detects the error rate and diminishes, judge whether all the other light wave error rates become greatly in the described wavelength channel, if become large, notify described error rate adjustment module to regulate described power adjustments point to other direction.
This device also comprises:
The device that further embodiment of this invention provides a kind of DWDM network channel to optimize as shown in figure 16, comprising:
When above-mentioned judge module 1603 is judged described adjusting surplus sum less than above-mentioned difference, the luminous power of this wavelength in the wavelength channel is not regulated.
Said apparatus can also comprise:
Error rate adjustment module 1506 is used for when the optical power value of wavelength channel is adjusted to nominal power rating the power adjustments point in the route segment being regulated to either direction;
Whether error rate detection module 1507 is used for detecting the error rate and diminishing when described error rate adjustment module 1506 is regulated the error rate;
Error rate judge module 1508, be used for when described error rate detection module 1507 detects the error rate and diminishes, judge whether all the other light wave error rates become greatly in the described wavelength channel, if become large, notify described error rate adjustment module to regulate described power adjustments point to other direction.
This device also comprises:
The method and apparatus that the DWDM network channel that the embodiment of the invention provides is optimized, considered the balance optimizing algorithm of DWDM network wavelength channel, make the homology chummage reach balance with luminous power and the OSNR of each wavelength channel in path, the BER that utilizes FEC to carry out before the error correction of receiving end reaches optimum, the entire system performance reaches optimization, makes wavelength can transmit fartherly.And the method can carry out Automatic Optimal to network in the time of beginning of DWDM network, also can use the method that light wave is optimized during system maintenance.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (16)
1. the method that the DWDM network channel is optimized is characterized in that, comprising:
Steps A, when the optical power value in the wavelength channel does not reach nominal power rating, obtain the difference of described optical power value and described nominal power rating;
Step B, inquiry obtain the adjusting surplus of a power adjustments point in the described wavelength channel;
Step C, judgement are regulated surplus and whether are not less than described difference; If be not less than described difference, change step e over to; If less than described difference, change step D over to;
Step D, inquiry obtain the adjusting surplus of next power adjustments point in the described wavelength channel, with the adjusting surplus addition of the adjusting surplus among the step C and described next power adjustments point, and will regulate surplus and as new adjusting surplus, change step C over to;
Step e, the optical power value of described wavelength channel is adjusted to described nominal power rating.
2. the method for claim 1 is characterized in that, the adjusting surplus of all power adjustments points and during less than described difference in the described wavelength channel is not regulated described wavelength channel.
3. the method for claim 1 is characterized in that, before the described difference of obtaining described optical power value and described nominal power rating, also comprises:
According to power adjustments point and the position of test point the wavelength path in the wavelength channel is carried out segment processing pathway section.
4. the method for claim 1 is characterized in that, described optical power value with described wavelength channel is adjusted to after the nominal power rating, also comprises:
When the optical power value in the wavelength channel is adjusted to nominal power rating, the power adjustments point in the described wavelength channel is regulated to either direction, and whether the error rate that detects current wavelength diminishes;
If the described error rate diminishes, judge whether the error rate of its commplementary wave length in the described wavelength channel becomes greatly, if become large, regulate described power adjustments point to other direction.
5. method as claimed in claim 4 is characterized in that, described power adjustments point in the wavelength channel is regulated to either direction, and after detecting the error rate and not diminishing, whether inquiry has the record that the error rate diminishes; If have the record that diminishes, regulate described power adjustments point to other direction.
6. the method that the DWDM network channel is optimized is characterized in that, comprising:
When the optical power value in the wavelength channel does not reach nominal power rating, obtain the difference of described optical power value and described nominal power rating;
Judge the adjusting surplus of all power adjustments points in the described wavelength channel and whether be not less than described difference;
If be not less than described difference, regulate any or a plurality of power adjustments point in the described wavelength channel, the optical power value of described wavelength channel is adjusted to described nominal power rating.
7. method as claimed in claim 6 is characterized in that, the adjusting surplus of all power adjustments points and during less than described difference in the described wavelength channel is not regulated described wavelength channel.
8. method as claimed in claim 7 is characterized in that, before the described difference of obtaining described optical power value and described nominal power rating, also comprises:
According to power adjustments point and the position of test point the wavelength path in the wavelength channel is carried out segment processing pathway section, the point of the power adjustments in the described route segment is regulated.
9. method as claimed in claim 6 is characterized in that, described optical power value with described wavelength channel is adjusted to after the nominal power rating, also comprises:
When the optical power value in the wavelength channel is adjusted to nominal power rating, the power adjustments point in the described wavelength channel is regulated to either direction, and whether the error rate that detects current wavelength diminishes;
If the described error rate diminishes, judge whether the error rate of its commplementary wave length in the described wavelength channel becomes greatly, if become large, regulate described power adjustments point to other direction.
10. method as claimed in claim 9 is characterized in that, described power adjustments point in the wavelength channel is regulated to either direction, and after detecting the error rate and not diminishing, whether inquiry has the record that the error rate diminishes; If have the record that diminishes, regulate described power adjustments point to other direction.
11. the device that the DWDM network channel is optimized is characterized in that, comprising:
Difference calculating module is used for calculating the difference of described optical power value and described nominal power rating when the optical power value of wavelength channel does not reach nominal power rating;
Enquiry module is used for the adjusting surplus that inquiry obtains a power adjustments point of described wavelength channel;
Judge module is used for judging whether regulate surplus is not less than described difference; If be not less than, then send described adjusting surplus to adjustment module; If less than, then send described adjusting surplus to accumulator module;
Accumulator module, be used for receiving the adjusting surplus of the next power adjustments point of described wavelength channel that obtains by described enquiry module, with the adjusting surplus addition that is sent to from described judge module, adjusted surplus and, and will regulate surplus and as new adjusting surplus, send to described judge module;
Adjustment module is used for the adjusting surplus that sends according to from described judge module, and the optical power value of described wavelength channel is adjusted to described nominal power rating.
12. device as claimed in claim 11 is characterized in that, also comprises:
Error rate adjustment module is used for when the optical power value of wavelength channel is adjusted to nominal power rating the power adjustments point in the route segment being regulated to either direction;
Error rate detection module is used for when described error rate adjustment module is regulated the error rate, and whether the error rate that detects current wavelength diminishes;
Error rate judge module, when diminishing for the error rate that detects current wavelength when described error rate detection module, judge whether all the other light wave error rates become greatly in the described wavelength channel, if become large, notify described error rate adjustment module to regulate described power adjustments point to other direction.
13. device as claimed in claim 12 is characterized in that, also comprises:
The query note module is used for when described error rate detection module detects the error rate and do not diminish, and whether the error rate of inquire about current wavelength has the record that diminishes, if the record that nothing diminishes notifies error rate adjustment module to regulate next power adjustments point; If have the record that diminishes, notice error rate adjustment module is regulated described power adjustments point to other direction.
14. the device that the DWDM network channel is optimized is characterized in that, comprising:
Difference calculating module is used for calculating the difference of described optical power value and described nominal power rating when the optical power value of wavelength channel does not reach nominal power rating;
Enquiry module is used for inquiry and obtains the adjusting surplus sum of described all power adjustments points of wavelength channel, and is sent to judge module;
Judge module is used for judging whether described adjusting surplus sum is not less than described difference; If be not less than, then send described adjusting surplus sum to adjustment module;
Adjustment module is used for regulating at least one power adjustments point in the described wavelength channel according to described adjusting surplus sum, and the optical power value of described wavelength channel is adjusted to described nominal power rating.
15. device as claimed in claim 14 is characterized in that, also comprises:
Error rate adjustment module is used for when the optical power value of wavelength channel is adjusted to nominal power rating the power adjustments point in the route segment being regulated to either direction;
Error rate detection module is used for when described error rate adjustment module is regulated the error rate, and whether the error rate that detects current wavelength diminishes;
Error rate judge module is used for judging whether all the other light wave error rates become greatly in the described wavelength channel, if change notifies described error rate adjustment module to regulate described power adjustments point to other direction greatly when described error rate detection module detects the error rate and diminishes.
16. device as claimed in claim 14 is characterized in that, also comprises:
The query note module is used for when described error rate detection module detects the error rate and do not diminish, and whether the error rate of inquire about current wavelength has the record that diminishes, if the record that nothing diminishes notifies error rate adjustment module to regulate next power adjustments point; If have the record that diminishes, notice error rate adjustment module is regulated described power adjustments point to other direction.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101808257B (en) * | 2010-02-26 | 2012-09-12 | 北京邮电大学 | Method and device for optimizing dynamic transmission performance in wavelength switched optical network |
| CN102142903B (en) * | 2011-03-29 | 2014-04-02 | 华为技术有限公司 | Optical power regulating and measuring method, device and system |
| CN105830365B (en) * | 2014-04-17 | 2018-10-12 | 华为技术有限公司 | A kind of monitoring method and device of optical signal to noise ratio |
| CN107579799B (en) * | 2017-09-22 | 2019-01-29 | 烽火通信科技股份有限公司 | Link wave spectrum method of adjustment and system based on DWDM |
| CN110505012B (en) * | 2019-09-27 | 2022-11-04 | 唐彦 | Method and device for judging bottleneck of wavelength division system |
| CN113411688B (en) * | 2020-03-16 | 2023-04-07 | 华为技术有限公司 | Method, equipment and system for route calculation |
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| CN1612514A (en) * | 2003-10-28 | 2005-05-04 | 华为技术有限公司 | Wave-division multiplexing optical network luminous power control method |
| CN1633057A (en) * | 2004-12-29 | 2005-06-29 | 烽火通信科技股份有限公司 | A WDM optical transmission system with automatic link gain adjustment and method thereof |
| WO2007138649A1 (en) * | 2006-05-25 | 2007-12-06 | Mitsubishi Electric Corporation | Optical relay device and optical relay transmission system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1612514A (en) * | 2003-10-28 | 2005-05-04 | 华为技术有限公司 | Wave-division multiplexing optical network luminous power control method |
| CN1633057A (en) * | 2004-12-29 | 2005-06-29 | 烽火通信科技股份有限公司 | A WDM optical transmission system with automatic link gain adjustment and method thereof |
| WO2007138649A1 (en) * | 2006-05-25 | 2007-12-06 | Mitsubishi Electric Corporation | Optical relay device and optical relay transmission system |
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