CN104253648B - Optical transport network equipment and correlation method - Google Patents
Optical transport network equipment and correlation method Download PDFInfo
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- CN104253648B CN104253648B CN201310270934.2A CN201310270934A CN104253648B CN 104253648 B CN104253648 B CN 104253648B CN 201310270934 A CN201310270934 A CN 201310270934A CN 104253648 B CN104253648 B CN 104253648B
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Abstract
The present invention relates to a kind of mapper for optical transport network, including first slope signal generator, for receiving client clock signal, and produces client's ramp signal；Second ramp signal generator, for the customer data amount information that is transmitted through feedback reception per unit frame in from inside the mapper, and produces transmission ramp signal；Comparator, coupled to the first slope signal generator and second ramp signal generator, for producing the difference of client's ramp signal and the transmission ramp signal；And adjuster, the customer data amount information for being transmitted to the per unit frame according to the output of the comparator is adjusted；Wherein, client's ramp signal and the transmission ramp signal include integer part and fractional part, the digit of the fractional part at least with the expectation quality of the mapper and the frequency dependence of the client clock signal.Present invention also offers a kind of corresponding demapper for being used for optical transport network.
Description
Technical field
The invention mainly relates to optical transport network technology, in particular to being used for being mapped in optical transport network and gone
The device and method of mapping.
Background technology
Two are included to the transmission of customer data in optical transport network (Optical Transport Network, OTN)
Process, the mapping process carried out in dispensing device and the demapping process carried out in reception device.So-called transparent transmission,
Complete reduction customer data and client clock signal are just to try to.This is the state that all-network transmission is intended to reach.
Traditional mapper or demapper are only by buffers store client clock signal and transmission clock signal, right
The two is compared, and the data volume transmitted by per unit frame is adjusted in mapper based on result of the comparison, or base
Client clock signal is reduced in the comparative result.
Content of the invention
Either for mapper or demapper, it is used for being compared only with a buffer and adjusts institute
The result that brings is exactly that the precision that can reach of mapper or demapper is very low.In addition, also being held very much using this traditional approach
Low frequency noise is introduced in mapping process easily, so as to be more difficult to the purpose for reaching transparent transmission.
Apparatus and method provided by the present invention can be used for the OTN networks for transmitting high speed client signal, due to mapper
All there is higher accuracy with demapper, therefore improve the also proper mass of client clock.Further, since in demapping mistake
The low-frequency jitter of mapping process introducing is filtered in journey, the shake of the client clock after reduction and drift index fall can be with
Reach 30%.Further, since the relatively low performance for depending on digital circuit and clock oscillator of the solution of the present invention, therefore adopts
The asic chip or FPGA of low cost can just realize that high-precision mapping and demapping are operated.
One aspect of the present invention provides the mapper in a kind of transmission equipment for optical transport network, including first slope
Signal generator, for receiving client clock signal, and produces corresponding client's ramp signal；Second ramp signal occurs
Device, for the customer data amount information that is transmitted through feedback reception per unit frame in from inside the mapper, and produces corresponding
Transmission ramp signal；Comparator, coupled to the first slope signal generator and second ramp signal generator, uses
In the difference for producing client's ramp signal and the transmission ramp signal；And adjuster, coupled to the comparator, it is used for
According to client's ramp signal and the difference of the transmission ramp signal, the customer data amount transmitted by the per unit frame in
Information is adjusted, and by adjustment after the customer data amount information output transmitted of the per unit frame in oblique to described second
Slope signal generator；Wherein, client's ramp signal and the transmission ramp signal include integer part and fractional part, institute
State the digit of fractional part at least with the expectation quality of the mapper and the frequency dependence of the client clock signal.
Particularly, the first slope signal generator is used for oblique based on the preliminary client of the client clock signal generation
Slope signal, enters row interpolation and filtering based on sampled clock signal to preliminary client's ramp signal, so as to generate the visitor
Family ramp signal；The frequency of wherein described sampled clock signal is at least 3 times of the client clock signal frequency.
Particularly, second ramp signal generator is used for making the transmission slope letter based on the sampled clock signal
Number be incremented by, the incremental amplitude is the visitor transmitted by the per unit frame in each cycle for averagely arriving the sampled clock signal
User data amount, the digit of the customer data amount fractional part that wherein described per unit frame in is transmitted and the transmission ramp signal
Fractional part digit identical.
Particularly, the mapper also includes the adder being coupling between the comparator and the adjuster, is used for
By the periodic noises Signal averaging received from modulation noise signal generator in the output signal of the comparator, and will be folded
Plus after signal be sent to the adjuster, the frequency of the noise signal is higher than the demapper in the optical transport network
Low-pass loop bandwidth, and the low-pass loop bandwidth less than the mapper.
Particularly, the mapper also includes buffer, for being received and described in storing according to the client clock signal
Customer data；Read Controller, the reading being coupling between the adjuster and the buffer, for according to from the tune
The customer data of the data amount information transmitted by the per unit frame in that whole device is received to storage in the buffer
It is adjusted；And expense inserter, the buffer is coupled to, for the customer data insertion expense after adjusted
Data are so as to generating transmission data.
Particularly, the mapper also includes wave filter, coupled to the comparator, for the output to the comparator
Signal is filtered；And amplifier, it is coupling between the wave filter and the adder, for described in after filtering
The output signal of comparator is amplified.
The demapper in a kind of receiving device for optical transport network is another aspect provides, including：
First slope signal generator, for through feedback reception client clock signal, producing corresponding visitor from inside the demapper
Family ramp signal；Second ramp signal generator, for receiving the customer data amount transmitted by per unit frame in, and produces corresponding
Transmission ramp signal；Comparator, coupled to the first slope signal generator and second ramp signal generator, uses
In the difference for producing client's ramp signal and the transmission ramp signal；And the clock oscillation coupled to the comparator
Device, for reducing the client clock signal according to the difference of client's ramp signal and the transmission ramp signal, and by institute
The client clock signal output through reducing is stated to the first slope transmitter；Wherein, client's ramp signal and the biography
Defeated ramp signal includes integer part and fractional part, and the digit of the fractional part is at least smart with the expectation of the demapper
Degree and the frequency dependence of the client clock signal.
Particularly, the first slope signal generator is used for oblique based on the preliminary client of the client clock signal generation
Slope signal, enters row interpolation and filtering based on sampled clock signal to preliminary client's ramp signal, so as to generate the visitor
Family ramp signal；The frequency of wherein described sampled clock signal is at least 3 times of the client clock signal frequency.
Particularly, second ramp signal generator is used for making the transmission slope letter based on the sampled clock signal
Number be incremented by, the incremental amplitude averagely arrives the client transmitted by the per unit frame in each cycle of the sampled clock signal
Data volume, the digit of the customer data amount fractional part that wherein described per unit frame in is transmitted and the transmission ramp signal
Fractional part digit is identical.
Particularly, the demapper also includes wave filter, coupled to the comparator, for believing to the client slope
Number and described transmission ramp signal difference be filtered；Amplifier, coupled to the wave filter and the clock oscillator, is used for
The output signal of the comparator after filtering is amplified and the output letter by the comparator that is filtered and amplifying
Number send the clock oscillator to；Expense and customer data extractor, for receiving transmission data, and therefrom extract described every
The data amount information and pending customer data of unit frame in transmission, and it is transferred to the second ramp signal generation
Device；Buffer, coupled to the expense and customer data extractor, for receiving the pending customer data, and according to
Through the client clock signal that the clock oscillator is reduced, the customer data is reduced and is exported；Wherein, by described
One ramp signal generator, the second ramp signal generator, comparator, wave filter, amplifier, the low pass of clock oscillator composition
The band of loop is a width of 1 to 10 hertz.
An aspect of of the present present invention provides a kind of optical transport network equipment, is used for connecing including arbitrary mapper as previously described
Receive customer data and produce transmission data for transmitting on optical transport network, and arbitrary demapper is used as previously described
In receiving the transmission data and be reduced to the customer data.
Present invention also offers a kind of method for carrying out map operation in the transmission equipment of optical transport network, bag
Include：Client clock signal is received, and is based on the corresponding client's ramp signal of the client clock signal generation；Receive per unit frame
Interior transmitted customer data amount information, and corresponding transmission ramp signal is generated based on the information；The visitor is obtained through comparing
Family ramp signal and the difference of the transmission ramp signal, and according to client's ramp signal and the difference of the transmission ramp signal
The customer data amount information transmitted by the per unit frame in is adjusted；Wherein, client's ramp signal and the biography
Defeated ramp signal includes integer part and fractional part, the expectation quality of the digit of the fractional part at least with the mapper
Frequency dependence with the client clock signal.
Particularly, described based on client clock signal generation client's ramp signal the step of include：It is based on the visitor
Family clock signal generates preliminary client's ramp signal；Row interpolation is entered simultaneously to the preliminary ramp signal based on sampled clock signal
It is filtered, so as to generate client's ramp signal；The frequency of wherein described sampled clock signal is the client clock letter
At least 3 times of number frequency；Described generation based on the customer data amount information transmitted by the per unit frame in transmits ramp signal
The step of include：It is incremented by the transmission ramp signal based on the sampled clock signal, the incremental amplitude is averagely to arrive
The customer data amount transmitted by the per unit frame in each cycle of the sampled clock signal, wherein described per unit frame in institute
The digit of the fractional part of the customer data amount of transmission is identical with the fractional part digit of the transmission ramp signal.
Present invention also offers a kind of method for carrying out demapping operation in the receiving device of optical transport network, including connecing
Client clock signal is received, and is based on client clock signal generation client's ramp signal；Receive what per unit frame in was transmitted
Customer data amount information, and corresponding transmission ramp signal is generated based on the information；Client's ramp signal is obtained through comparing
Difference with the transmission ramp signal；And according to the reduction of the difference of client's ramp signal and the transmission ramp signal
Client clock signal；Wherein, client's ramp signal and the transmission ramp signal include integer part and fractional part, institute
State the digit of fractional part at least with the expectation quality of the demapper and the frequency dependence of the client clock signal.
Particularly, described based on client clock signal generation client's ramp signal the step of include：It is based on the visitor
Family clock signal generates preliminary client's ramp signal, preliminary client's ramp signal is carried out based on sampled clock signal
Difference and filtering, so that generate client's ramp signal；The frequency of wherein described sampled clock signal is at least the client
3 times of clock signal frequency in short-term；Described generation based on the customer data amount information transmitted by per unit frame in transmits slope letter
Number the step of include：It is incremented by the transmission ramp signal based on the sampled clock signal, the incremental amplitude is average
To the customer data amount transmitted by the per unit frame in each cycle of the sampled clock signal, wherein described per unit frame in
The digit of the fractional part of the customer data amount that is transmitted is identical with the fractional part digit of the transmission ramp signal.
Description of the drawings
Fig. 1 show the mapper schematic diagram in optical transport network described according to one embodiment of present invention；
Fig. 2 a and Fig. 2 b show the mapper described in one embodiment of the invention and enter row interpolation to client's ramp signal
Schematic diagram before and after filtering operation；
Fig. 3 show the demapper schematic diagram in optical transport network described according to one embodiment of present invention；
Fig. 4 show the flow process for carrying out map operation in optical transport network described according to one embodiment of present invention
Schematic diagram；
Fig. 5 show the stream for carrying out demapping operation in optical transport network described according to one embodiment of present invention
Journey schematic diagram；And
Fig. 6 show the schematic diagram of optical transport network equipment described according to one embodiment of present invention.
Specific embodiment
The manufacture and use of embodiments herein is discussed further below.It is to be understood that the invention provides
Many feasible inventive concepts that can implement under various concrete backgrounds.The specific embodiment for being discussed only is that manufacture is described
Concrete mode with the present invention is used, does not limit the scope of the invention.
Fig. 1 show the schematic diagram of the mapper 100 according to one embodiment of the invention.Fig. 4 show mapper
100 method flow diagrams for carrying out map operation.
In step 402, client's ramp signal generator 102 receives client clock signal.Frequency due to client clock signal
Rate is typically all higher than the operating frequency of digital circuit, so according to one embodiment of present invention, client's ramp signal generator
102 receive can be through frequency divider 124 frequency dividing client clock signal.Frequency divider 124 can be to client clock signal
Fractional-N frequency is carried out, such as, for the OTN networks that client signal rate is 10G, N can be equal to 64.
102 client's ramp signal generator 102 of client's ramp signal generator can be based on client clock signal and produce one
Individual preliminary ramp signal is as shown in Figure 2 a.Wherein often increase a client clock cycle, corresponding ramp signal values also add one.
For example, the corresponding ramp signal values in the position in the 1st client clock cycle are 1.
Client's ramp signal generator 102 can also enter row interpolation and filtering process to above-mentioned preliminary ramp signal.Such as
Shown in Fig. 2 b, sampled clock signal is inserted in client clock signal, the frequency of the sampled clock signal is believed higher than client clock
Number, particularly, the frequency of the sampled clock signal is at least 3 times of client clock signal frequency.
Ramp signal values corresponding to sampling clock cycle are that the wave filter in client's ramp signal generator 102 enters
Obtain after row filtering.So, the preliminary ramp signal is being formed client's ramp signal after interpolation and filtering.
Client's ramp signal includes an integer part and a fractional part.Integer part is exactly each client clock week
Ramp signal values corresponding to phase, fractional part are the values obtained after 102 filtering interpolation of client's ramp signal generator.This
Digit S of individual fractional part determines according to the desired mapper accuracy of user.For example, can according to below equation (1)
Calculated with digit S to fractional part.Assume that desired accuracy is 10 psecs, divided after client clock signal
Frequency is 19440000 hertz, then according to knowable to below equation, digit S of the fractional part of client's ramp signal should be 13.
In step 404, transmission ramp signal generator 104 can be from inside mapper through feedback reception per unit frame in institute
Customer data amount information Cn of transmission.Transmission ramp signal generator 104 (is also referred to as passed based on the sampled clock signal
Defeated clock signal) it is incremented by the transmission ramp signal, incremental amplitude can be calculated by below equation
Wherein S is identical with the value in the introduction above with respect to client's ramp signal generator with the value of N.Through so
The calculated ramp signal values of mode also there is an integer part and a fractional part, and its fractional part digit
Also it is S.
In step 406, comparator 106 receives client's ramp signal from client's ramp signal generator 102, from transmission slope
Signal generator 104 receives transmission ramp signal, and by comparing calculating the difference between the two.
In step 408, wave filter 108 receives the difference of client's ramp signal and transmission ramp signal from comparator 106, and right
Which is filtered.Skilled person will appreciate that, filtering operation in this step and filtering operation in step 402 can be with
Same step is merged into, without affecting the effect of the present invention.
In step 410, amplifier 110 receives reception client ramp signal after filtering from wave filter 108 and transmits tiltedly
The difference of slope signal, and which is amplified.
In step 412, adjuster 112 receive after filtering with amplify client's ramp signal with transmission ramp signal it
Difference, and customer data amount Cn that per unit frame is transmitted is adjusted according to the information.If client's ramp signal is less than transmission
Ramp signal, then just increase Cn, corresponding to the data that per unit frame can be added into one or more bits；If client is oblique
Slope signal is more than transmission ramp signal, then just reduces Cn, can be reduced one or more bits corresponding to per unit frame
Data.
According to one embodiment of present invention, can be to client's ramp signal and transmission slope in all devices of each sampling clock
Signal is compared, and Cn once can be adjusted in each unit frame adjuster 112.
The Cn being adjusted can also be fed back to transmission ramp signal generator 104 by adjuster 112.
In step 414, Read Controller 118 receives adjusted Cn from adjustment period 112, and according to the information to storage
Customer data in buffer 120 is adjusted correspondingly, and sends reading enable signal.
In step 416, expense inserter 122 receives the customer data being adjusted from buffer 120, and inserts expense number
According to so as to generate the Frame that can be transmitted on optical transport network also referred to as high level data frame.
According to one embodiment of present invention, methods described also includes step 411, adder between step 410 and 412
116 from modulation noise signal generator 114 receive a cycle high frequency noise signals, and by the noise signal be superimposed upon from
On the client's ramp signal and the difference of transmission ramp signal that amplifier 110 is received.According to one embodiment of present invention, this is made an uproar
Message number is triangular signal.
Bandwidth of the frequency of the noise signal less than the low-pass loops by 102,104,108,110 and 112 compositions, therefore not
The mapped device 100 of meeting is filtered out.In addition, the frequency of the noise signal is higher than caused by due to adjustment of the adjuster 112 to Cn
The frequency of low-frequency jitter, also above the bandwidth of the low-pass loop in corresponding demapper in optical transport network.
As the frequency of shake caused by adjuster 112 is very low, it is difficult to be detected in demapper so as to being not easy to
It is filtered out, the introducing of above-mentioned noise signal improves the frequency of the low-frequency jitter, so as to help demapper to filter the shake.
According to one embodiment of present invention, to the encapsulation of customer data be can by one or more mappers 100 by
Layer is carried out.
According to test, using mapper provided herein, as described above, client clock signal frequency is 19440000
Hertz, in the case that digit S of the fractional part of ramp signal is 13, mapper 100 can reach the accuracy of 6.28 psecs,
Meet the predeterminated target of 10 psecs.
Fig. 3 show the schematic diagram of the demapper 300 according to one embodiment of the invention.Fig. 5 is according to this
Bright one is the flow chart that the demapper 300 described in embodiment carries out demapping operation.
In step 502, client's ramp signal generator 302 is believed through feedback reception client clock from inside demapper 300
Number.According to one embodiment of present invention, frequency divider 318 can carry out Fractional-N frequency to client clock signal and by frequency dividing after visitor
Family clock signal is sent to client's ramp signal generator 302.
Client's ramp signal generator 302 is identical with the client's ramp signal generator 102 in Fig. 1, and basis can be adopted
Sample clock signal enters row interpolation and filtering to preliminary client's ramp signal, so as to generate client's ramp signal.
In step 504, the customer data that ramp signal generator 304 receives the transmission of per unit frame from buffer 316 is transmitted
Amount information Cn.Transmission ramp signal generator 304 is identical with the transmission ramp signal generator 104 in Fig. 1, can be according to sampling
Clock signal and received Cn generate corresponding transmission ramp signal.
In step 506, comparator 306 receives client's ramp signal from client's ramp signal generator 302, from transmission slope
Signal generator 304 receives transmission ramp signal, and by comparing calculating the difference between the two.
In step 508, wave filter 308 receives the difference of client's ramp signal and transmission ramp signal from comparator 306, and right
Which is filtered.Skilled person will appreciate that, filtering operation in this step and filtering operation in step 502 can be with
Same step is merged into, without affecting the effect of the present invention.
As mapper as the aforementioned may be superimposed noise signal in the transmission signal, and the frequency of the noise signal is high
In demapper by 302,304,306,308,310 and 312 constitute low-pass loops bandwidth, therefore the noise signal together with
Caused by mapper superposed thereon, shake can be unmapped device 300 and detect and filter.In order to reach this purpose, go to reflect
The bandwidth of the low-pass loop of emitter 300 should be chosen in the range of 1 hertz to 10 hertz.
In step 510, amplifier 310 is believed from client's ramp signal that wave filter 308 is received after filtering with transmission slope
Number difference, and which is amplified.
In step 512, clock oscillator 312 receives client's ramp signal and transmission ramp signal after filtering with amplification
Difference, and according to the information reverting client clock signal.Clock oscillator can be numerically-controlled oscillator, or voltage-controlled
Oscillator.Clock oscillator 314 by reduction after client clock signal feed back to client's ramp signal generator 302.
In step 514, expense and the reception transmission data of customer data extractor 316 and transmission clock signal, and therefrom carry
Customer data amount information Cn of per unit frame transmission is taken out, and the pending customer data for eliminating overhead data is sent to
Buffer 314, and Cn is sent to transmission ramp signal generator 304.
In step 516, buffer 314 is according to the client clock signal received from clock oscillator 312 to customer data
Reduced and exported.
According to one embodiment of present invention, can be by one or many to the reduction of customer data and client clock signal
Individual demapper 300 is successively carried out, and finally obtains customer data to be reduced and client clock signal.
According to one embodiment of present invention, described unit frame can be single frames or multi-frame.
Fig. 6 is the optical transmission device 600 according to one embodiment of the present of invention, including the mapping for communicating each other
Device 602 and demapper 604, possess and 300 identical 26S Proteasome Structure and Function of aforementioned mapper 100 and demapper respectively.Light is passed
Transfer device can be multi-service convergent type wavelength shifter (Muxponder) or transmission transponder (Transponder).
Those skilled in the art are easy for learning, can change material and method within the scope of the invention.Should also
It is understood by, in addition to the concrete linguistic context for embodiment is described, the invention provides many applicable novelties are general
Read.Correspondingly, claims are intended to such process, machine, manufacture, material synthesis, device, method or step bag
Include in the range of them.
Claims (15)
1. the mapper in a kind of transmission equipment for optical transport network, including
First slope signal generator, for receiving client clock signal, and produces corresponding client's ramp signal；
Second ramp signal generator, for the client's number transmitted through feedback reception per unit frame in from inside the mapper
According to amount information, and produce corresponding transmission ramp signal；
Comparator, coupled to the first slope signal generator and second ramp signal generator, described for producing
Client's ramp signal and the difference of the transmission ramp signal；And
Adjuster, coupled to the comparator, for the difference according to client's ramp signal and the transmission ramp signal, right
The customer data amount information transmitted by the per unit frame in is adjusted, and by adjustment after the per unit frame in transmitted
Customer data amount information output give second ramp signal generator；
Wherein, client's ramp signal and the transmission ramp signal include integer part and fractional part, the fractional part
Point digit at least with the expectation quality of the mapper and the frequency dependence of the client clock signal.
2. mapper as claimed in claim 1, wherein described first slope signal generator are used for being based on the client clock
The preliminary client's ramp signal of signal generation, based on sampled clock signal preliminary client's ramp signal is entered row interpolation and
Filtering, so that generate client's ramp signal；The frequency of wherein described sampled clock signal is at least the client clock letter
3 times of number frequency.
3. mapper as claimed in claim 2, wherein described second ramp signal generator are used for being based on the sampling clock
Signal is incremented by the transmission ramp signal, and the incremental amplitude is averagely to arrive each cycle of the sampled clock signal
The customer data amount transmitted by per unit frame in, the position of the customer data amount fractional part that wherein described per unit frame in is transmitted
Number is identical with the fractional part digit of the transmission ramp signal.
4. mapper as claimed in claim 1, also includes the adder being coupling between the comparator and the adjuster,
For will from modulation noise signal generator receive periodic noises Signal averaging the comparator output signal, and
Signal after by superposition is sent to the adjuster, and the frequency of the noise signal is higher than the demapping in the optical transport network
The low-pass loop bandwidth of device, and the low-pass loop bandwidth less than the mapper.
5. mapper as claimed in claim 1, also includes：
Buffer, for receiving according to the client clock signal and storing the customer data；
Read Controller, is coupling between the adjuster and the buffer, receives from the adjuster for basis
The data amount information transmitted by the per unit frame in is adjusted to the customer data stored in the buffer；And
Expense inserter, is coupled to the buffer, for the customer data insertion overhead data after adjusted so as to
Generate transmission data.
6. mapper as claimed in claim 4, also includes：
Wave filter, coupled to the comparator, for being filtered to the output signal of the comparator；And
Amplifier, is coupling between the wave filter and the adder, for the output to the comparator after filtering
Signal is amplified.
7. the demapper in a kind of receiving device for optical transport network, including：
First slope signal generator, corresponding for through feedback reception client clock signal, producing from inside the demapper
Client's ramp signal；
Second ramp signal generator, for receiving the customer data amount transmitted by per unit frame in, and produces corresponding transmission
Ramp signal；
Comparator, coupled to the first slope signal generator and second ramp signal generator, described for producing
Client's ramp signal and the difference of the transmission ramp signal；And
Coupled to the clock oscillator of the comparator, for according to client's ramp signal and the transmission ramp signal it
The difference reduction client clock signal, and by the client clock signal output through reducing to the first slope generator；
Wherein, client's ramp signal and the transmission ramp signal include integer part and fractional part, the fractional part
Point digit at least with the expectation quality of the demapper and the frequency dependence of the client clock signal.
8. demapper as claimed in claim 7, when wherein described first slope signal generator is used for based on the client
The preliminary client's ramp signal of clock signal generation, enters row interpolation based on sampled clock signal to preliminary client's ramp signal
And filtering, so as to generate client's ramp signal；The frequency of wherein described sampled clock signal is at least the client clock
3 times of signal frequency.
9. demapper as claimed in claim 8, wherein described second ramp signal generator are used for based on during the sampling
Clock signal is incremented by the transmission ramp signal, and the incremental amplitude averagely arrives each cycle of the sampled clock signal
The customer data amount transmitted by per unit frame in, the position of the customer data amount fractional part that wherein described per unit frame in is transmitted
Number is identical with the fractional part digit of the transmission ramp signal.
10. demapper as claimed in claim 9, also includes
Wave filter, coupled to the comparator, for carrying out to the difference of client's ramp signal and the transmission ramp signal
Filtering；
Amplifier, coupled to the wave filter and the clock oscillator, for the output to the comparator after filtering
Signal is amplified and sends the output signal of the comparator that is filtered and amplifying to the clock oscillator；
Expense and customer data extractor, for receiving transmission data, and therefrom extract the data of the per unit frame in transmission
Amount information and pending customer data, and it is transferred to second ramp signal generator；
Buffer, coupled to the expense and customer data extractor, for receiving the pending customer data, and according to
Through the client clock signal that the clock oscillator is reduced, the customer data is reduced and is exported；
Wherein, by the first slope signal generator, the second ramp signal generator, comparator, wave filter, amplifier, when
The band of the low-pass loop of clock oscillator composition is a width of 1 to 10 hertz.
A kind of 11. optical transport network equipment, are used for receiving client's number including the mapper as described in arbitrary in claim 1 to 6
According to and produce transmission data for transmitting on optical transport network, and going as described in arbitrary in claim 7 to 10 reflect
Emitter is used for receiving the transmission data and being reduced to the customer data.
A kind of 12. methods for carrying out map operation in the transmission equipment of optical transport network, including：
Client clock signal is received, and is based on the corresponding client's ramp signal of the client clock signal generation；
The customer data amount information transmitted by per unit frame in is received, and corresponding transmission ramp signal is generated based on the information；
Through comparing the difference for obtaining client's ramp signal and the transmission ramp signal, and according to client's ramp signal and
The customer data amount information transmitted to the per unit frame in by the difference of the transmission ramp signal is adjusted；
Wherein, client's ramp signal and the transmission ramp signal include integer part and fractional part, the fractional part
Point digit at least with the expectation quality of mapper and the frequency dependence of the client clock signal.
13. methods as claimed in claim 12, wherein
Described based on client clock signal generation client's ramp signal the step of include：
Based on the preliminary client's ramp signal of the client clock signal generation；
Preliminary client's ramp signal is entered by row interpolation and is filtered based on sampled clock signal, so as to generate the visitor
Family ramp signal；The frequency of wherein described sampled clock signal is at least 3 times of the client clock signal frequency；
The step of customer data amount information that is transmitted based on the per unit frame in generates transmission ramp signal includes：
It is incremented by the transmission ramp signal based on the sampled clock signal, the incremental amplitude is averagely to arrive the sampling
The customer data amount transmitted by the per unit frame in each cycle of clock signal, the visitor transmitted by wherein described per unit frame in
The digit of the fractional part of user data amount is identical with the fractional part digit of the transmission ramp signal.
A kind of 14. methods for carrying out demapping operation in the receiving device of optical transport network, including
Client clock signal is received, and is based on client clock signal generation client's ramp signal；
The customer data amount information transmitted by per unit frame in is received, and corresponding transmission ramp signal is generated based on the information；
Through comparing the difference for obtaining client's ramp signal and the transmission ramp signal；And
The client clock signal is reduced according to the difference of client's ramp signal and the transmission ramp signal；
Wherein, client's ramp signal and the transmission ramp signal include integer part and fractional part, the fractional part
Point digit at least with the expectation quality of mapper and the frequency dependence of the client clock signal.
15. methods as claimed in claim 14, wherein
Described based on client clock signal generation client's ramp signal the step of include：
Based on the preliminary client's ramp signal of the client clock signal generation, based on sampled clock signal to the preliminary visitor
Family ramp signal carries out difference and filtering, so as to generate client's ramp signal；The frequency of wherein described sampled clock signal
3 times of at least described client clock signal frequency in short-term；
The step of customer data amount information that is transmitted based on per unit frame in produces transmission ramp signal includes：
It is incremented by the transmission ramp signal based on the sampled clock signal, the incremental amplitude is averagely to arrive the sampling
The customer data amount transmitted by the per unit frame in each cycle of clock signal, the visitor transmitted by wherein described per unit frame in
The digit of the fractional part of user data amount is identical with the fractional part digit of the transmission ramp signal.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06181475A (en) * | 1992-06-01 | 1994-06-28 | Fujitsu Ltd | Quadrature demodulation circuit |
| US5703912A (en) * | 1993-11-13 | 1997-12-30 | Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. | Clock-recovery device having cascaded resonance amplifiers |
| CN101383692A (en) * | 2007-09-06 | 2009-03-11 | 日立通讯技术株式会社 | Communication system and its device |
| CN102142862A (en) * | 2009-12-04 | 2011-08-03 | 英特尔公司 | Chaotic wide band frequency modulator for noise reduction |
-
2013
- 2013-06-28 CN CN201310270934.2A patent/CN104253648B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06181475A (en) * | 1992-06-01 | 1994-06-28 | Fujitsu Ltd | Quadrature demodulation circuit |
| US5703912A (en) * | 1993-11-13 | 1997-12-30 | Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. | Clock-recovery device having cascaded resonance amplifiers |
| CN101383692A (en) * | 2007-09-06 | 2009-03-11 | 日立通讯技术株式会社 | Communication system and its device |
| CN102142862A (en) * | 2009-12-04 | 2011-08-03 | 英特尔公司 | Chaotic wide band frequency modulator for noise reduction |
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