CN105359433A - Communication method, device and system - Google Patents
Communication method, device and system Download PDFInfo
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- CN105359433A CN105359433A CN201480001088.7A CN201480001088A CN105359433A CN 105359433 A CN105359433 A CN 105359433A CN 201480001088 A CN201480001088 A CN 201480001088A CN 105359433 A CN105359433 A CN 105359433A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
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Abstract
Disclosed are a communication method, device and system, the communication method comprising: determining that a pulse amplitude modulation (PAM) order is the p-th power of 2, and 1<=P<=m; feeding back the PAM order to an ONU; extending the PAM order into a PAM-N order, and employing the extended PAM-N order to communicate with the ONU, N being the m-th power of 2, and m>=2. The communication method, device and system of the present invention realize continuous modulation of different downlink PAM orders, thus achieving different ONU adaptive link rate levels.
Description
The present invention relates to the communications field, more particularly to a kind of communication means, apparatus and system.
With FTTx (Fiber To The x, intelligent acess x, such as FTTH represent fiber entering household,
FTTB, optical fiber enters building) large scale deployment, the bandwidth demand of soft exchange is increasing, at present
Soft exchange main flow uses PON (Passive Optical Network, EPON) technology, PON
Technology is a kind of point-to-multipoint passive optical network.One PON is installed on including one
The OLT (Optical Line Terminal, optical line terminal) of console for centralized control, and it is a collection of supporting
The ONU (Optical Network Unit, optical network unit) for being installed on customer site or ONT
(Optical Network Terminal, ONT Optical Network Terminal).ODN between OLT and ONU
(Optical Distribution Network, Optical Distribution Network) contains optical fiber and passive optical splitters
Or coupler.
PON is due to eliminating the active equipment between local side and user terminal, so that safeguarding letter
Single, reliability is high, cost is low, and can save fiber resource, is following FTTH (Fiber To The
Home, fiber entering household) primary solutions.
Various PON technologies all co-exist at this stage, EPON (Ethernet Passive Optical
Network, Ethernet passive optical network), 10G-EPON (10Gigabit EPON, 10 gigabits
Ethernet passive optical network), GPON (Gigabit Passive Optical Network, gigabit without
Source optical-fiber network), 10G-GPON (10Gigabit PON, 10 gigabit passive optical networks),
40G-TWDM PON (40Gigabit Time Wavelength Division Multiplex PON,
Gigabit time-division Wave division multiplexing passive optical network).Link total bandwidth is from 1G to 10G, or even 40G.
According to user bandwidth demand analysis, current bandwidth can meet the need of user's long period
Ask.In the case of total downlink bandwidth is 10G or 40G, each user is not necessarily to reach 10G
More than.
Pulse amplitude modulation (Pulse Amplitude Modulation, PAM) is the width of pulse carrier
A kind of modulation system changed with baseband signal is spent, can form multistage according to different bit combinations
PAM is modulated.If descending to be realized different PAM exponent numbers modulation, there can be downlink burst, it is impossible to
Realize.
The content of the invention
Embodiments of the invention provide one kind and realize communication means, apparatus and system, if for solving
The problem of different PAM exponent numbers are modulated is realized descending.
To reach above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that：
In a first aspect, a kind of communication means, including determine that pulse amplitude modulation PAM exponent numbers F, F are
2 P powers, 1≤P≤m；The pulse amplitude modulation PAM exponent numbers are fed back into the ONU；
The pulse amplitude modulation PAM exponent numbers are expanded into PAM N exponent numbers, after the extension
PAM N exponent numbers communicate with the ONU, wherein, the N is 2 m powers, m >=2.
With reference in a first aspect, in the first possible implementation of first aspect, methods described is also
The registration that PAM N ranks coding realizes ONU is expanded to including being encoded with PAM2 ranks.
With reference to the first possible implementation of first aspect, in second of possible implementation
In, the PAM2 ranks coding expands to PAM N ranks coding, specifically includes in data flow every 1
Bit expanded is that the 2nd bit after m bits, and extension is identical with the 1st bit to m bits.
It is described to adjust the impulse amplitude with reference in a first aspect, in the third possible implementation
PAM exponent numbers processed expand to PAM-N exponent numbers, and it is m to specifically include every P bit expandeds in data flow
The bit of pth+1 after bit, and extension is identical with the 1st bit to m bits, 1≤p≤m.
Second aspect, a kind of method of communication, including receive that the OLT sends with PAM-N ranks
The data of modulation, wherein, the m powers that N is 2, wherein m >=2；Adjusted with the impulse amplitude
PAM exponent numbers processed demodulate the number with PAM-N contrasts sent by the OLT for 2 P powers
According to wherein 1≤p≤m.
With reference to second aspect, in the first possible implementation of second aspect, the ONU
The coding registration of PAM N ranks is expanded to PAM2 ranks coding, wherein, N is 2 m powers, its
Middle m >=2.
With reference to the first possible implementation of second aspect, in second of possible implementation
In, it is the 2nd bit after m bits, and extension by every 1 bit expanded in data flow to m bits
It is identical with the 1st bit.
With reference to second aspect, in the third possible implementation, methods described also includes will be whole
Data flow is divided into multiple sub-data flows in units of m, and the pth+1 abandoned in each sub-data flow compares
Spy reformulates new data flow, for the ONU using PAM exponent numbers as 2 to m bits
P powers be demodulated.
The third aspect, a kind of communicator, including processing unit, for determining pulse amplitude modulation PAM
Exponent number is 2 P powers, 1≤P≤m1 integer；Transmitting element, for the impulse amplitude to be adjusted
PAM exponent numbers processed feed back to the ONU；The processing unit, is additionally operable to adjust the impulse amplitude
PAM exponent numbers processed expand to PAM-N exponent numbers, using the PAM-N exponent numbers after the extension with it is described
ONU communicates, wherein, the N is 2 m powers, m >=2.
With reference to the third aspect, in the first possible implementation of the third aspect, the processing is single
Member, which is additionally operable to encode with PAM2 ranks, expands to the registration that PAM N ranks coding realizes ONU.
With reference to the first possible implementation of the third aspect, in second of possible implementation
In, it is the 2nd bit after m bits, and extension by every 1 bit expanded in data flow to m bits
It is identical with the 1st bit.
With reference to the third aspect, in the third possible implementation, it will expand in data flow per P bits
Open up as m bits, and the bit of pth+1 after extension is identical with the 1st bit to m bits, 1
≤p≤m。
Fourth aspect, a kind of communicator, including receiving unit, send for receiving the OLT
With the data of PAM-N contrasts, wherein, N is 2 m powers, wherein m >=2；Processing unit,
For what is sent using the pulse amplitude modulation PAM exponent numbers as 2 P powers demodulation by the OLT
With the data of PAM-N contrasts, wherein 1≤p≤m.
With reference to fourth aspect, in the first possible implementation of fourth aspect, the processing is single
Member is additionally operable to expand to the coding registration of PAM N ranks with PAM2 ranks coding, wherein, N is 2 m
Power, wherein m are the integer more than or equal to 2.
With reference to the first possible implementation of fourth aspect, in second of possible implementation
In, the processing unit specifically for by every 1 bit expanded in data flow be m bits, and extension after
The 2nd bit it is identical with the 1st bit to m bits.
With reference to fourth aspect, in the third possible implementation, the processing unit be additionally operable to by
Whole data flow is divided into multiple sub-data flows in units of m, abandons the pth+1 in each sub-data flow
Bit reformulates new data flow to m bits, for the ONU using PAM exponent numbers as
2 p powers are demodulated.
5th aspect, a kind of optical line terminal OLT, including processor, the processor are used to perform
Method as described in first aspect and first aspect any one.
6th aspect, a kind of optical network unit ONU, including processor, the processor are used to perform
Method as described in second aspect and second aspect any one.
7th aspect, a kind of passive optical network PON, including OLT and ONU, wherein, OLT
Including the OLT as described in terms of the 5th, or ONU includes the ONU as described in terms of the 6th.
By the communication means of the present invention, apparatus and system, descending PAM different ranks can be achieved and connect
Continuous modulation, realizes different ONU adaptive links speed grades.
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be right
The accompanying drawing used required in embodiment description is briefly described, it should be apparent that, in describing below
Accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, not
On the premise of paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is PON system group network structural representation；
Fig. 2 is a kind of OLT provided in an embodiment of the present invention and ONU interaction diagrams；
Fig. 3 is the multistage flexible PON system architecture signals of PAM provided in an embodiment of the present invention
Figure；
Fig. 4 is a kind of signal node composition of use PAM-8 codings provided in an embodiment of the present invention；
Fig. 5 a kind of forms pseudo- PAM-4 coding to be provided in an embodiment of the present invention by extended coding
Signal node composition；
Fig. 6 a kind of forms pseudo- PAM-2 coding to be provided in an embodiment of the present invention by extended coding
Signal node composition；
Fig. 7 is a kind of downlink data stream encryption extended flow journey schematic diagram provided in an embodiment of the present invention；
Fig. 8 a realize PAM-8 for one kind provided in an embodiment of the present invention using programmable array FPGA
Encode the schematic diagram of extension；
Fig. 8 b realize PAM-4 for one kind provided in an embodiment of the present invention using programmable array FPGA
Coding expands to the schematic diagram of PAM-8 codings；
Fig. 8 c realize PAM-2 for one kind provided in an embodiment of the present invention using programmable array FPGA
Coding expands to the schematic diagram of PAM-8 codings；
Fig. 9 is a kind of optical line terminal OLT media access control MAC provided in an embodiment of the present invention
Inside modules make the schematic diagram of the transmission coding extension of adaptive PAM exponent numbers；
Figure 10 is a kind of PAM of the optical network unit ONU provided in an embodiment of the present invention according to feedback
Exponent number carries out the schematic diagram of adaptive demodulation；
Figure 11 is a kind of structural representation of device provided in an embodiment of the present invention；
Figure 12 is the structural representation of another device provided in an embodiment of the present invention；
Figure 13 is a kind of OLT structural representation provided in an embodiment of the present invention；
Figure 14 is a kind of ONU structural representation provided in an embodiment of the present invention.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is entered
Row is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the invention,
Rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
There is the every other embodiment made and obtained under the premise of creative work, belong to what the present invention was protected
Scope.
Embodiment one,
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention not office
Be limited to this, any one skilled in the art the invention discloses technical scope in, can
Change or replacement are readily occurred in, should be all included within the scope of the present invention.Therefore, it is of the invention
Protection domain described should be defined by scope of the claims.
As shown in figure 1, EPON (Passive Optical Network, PON) is by office side
Optical line terminal (Optical Line Terminal, OLT), the optical network unit (Optical of user side
Network Unit, ONU) or ONT Optical Network Terminal (Optical Network Terminal, ONT)
And Optical Distribution Network (Optical Distribute Network, ODN) composition.At present, have
Representational PON technologies are GPON (Gigabit-Capable Passive Optical Network, thousand
Million EPONs), EPON (Ethernet Passive Optical Network, Ethernet passive light
Network), 10G-GPON (being referred to as XG-PON), 10G-EPON.
OLT provides Network Side Interface for PON system, connects one or more ODN.ONU is
PON system provides user side interface, is connected with ODN.If ONU directly provides user port
The ethernet user port of function, such as PC (Personal Computer, PC) online,
Then it is referred to as ONT.Without specified otherwise, the ONU systems being mentioned below refer to ONU and ONT.ODN
The network being made up of optical fiber and passive optical splitters part, for connecting OLT device and ONU equipment,
For distributing or being multiplexed the data-signal between OLT and ONU.In PON system, from OLT
It is referred to as descending to ONU；Conversely, to be up from ONU to OLT.
Embodiment one
The embodiment of the present invention discloses a kind of method of communication, as shown in Fig. 2 including：
S200：OLT determines that pulse amplitude modulation PAM exponent numbers are F ranks, by the PAM exponent numbers
Send to ONU, F is 2 P powers, p is the integer more than or equal to 1, and less than or equal to m；
S202：The PAM exponent numbers are that to expand to PAM exponent numbers be N ranks to F ranks by OLT, using PAM
The modulation of N exponent numbers communicates with the ONU, wherein, N is 2 m powers, and m is more than or equal to 2
Integer；
S204：The ONU receives the data with PAM N contrasts that the OLT is sent, with institute
State pulse amplitude modulation PAM exponent numbers for F ranks demodulate by the OLT send with PAM N contrasts
The data of system.
Alternatively, the OLT determines pulse amplitude modulation PAM exponent numbers, can pass through following steps
Realize：
ONU detects received optical power, to optical line terminal OLT feedback reception luminous power；
OLT is according to ONU received optical powers, and it is F to determine PAM exponent numbers, wherein, F is 2 p
Power, p is the integer more than or equal to 1, and less than or equal to m；
Wherein, according to ONU received optical powers, PAM exponent numbers are determined, can be prestored by OLT
Luminous power and PAM exponent number mapping tables are stored up, is got by enquiry form and receives light with ONU
The corresponding PAM exponent numbers of power；Can also manually it be entered by manual input commands row, network management system
Row configuration；Can also here it be repeated no more using other schemes disclosed in prior art.
The PAM exponent numbers determined are fed back to ONU by OLT.
Alternatively, the OLT determines pulse amplitude modulation PAM exponent numbers, can also pass through following step
It is rapid to realize：
The SNR (Signal Noise Ratio, signal to noise ratio) of ONU detection channels, to optical line terminal
OLT feeds back the SNR；
OLT according to the SNR, determine PAM exponent numbers be F, F be 2 p powers, p be more than
Integer equal to 1, and less than or equal to m；
Wherein, according to the SNR of passage, PAM exponent numbers are determined, SNR can be pre-stored by OLT
With PAM exponent number mapping tables, corresponding PAM exponent numbers are obtained by enquiry form；It can also lead to
Cross and be manually entered order line, network management system manually to be configured；It can also be disclosed using prior art
Other schemes, repeat no more here.
The PAM exponent numbers determined are fed back to ONU by OLT.
Alternatively, methods described also includes：
OLT and ONU realizes that ONU registrations are reached the standard grade by extended coding.Wherein, the extension is compiled
Code can be by PAM-2 contrast systems by extended coding be PAM-N contrast systems, N be 2 m
Power, m is the integer more than or equal to 2.
Specifically, PAM-2 is expanded into PAM-N codings, including：
It is the 2nd bit after m bits, and extension by every 1 bit expanded in data flow to m ratios
It is special identical with the 1st bit.
Alternatively, it is described that the pulse amplitude modulation PAM exponent numbers are expanded into PAM-N exponent numbers, tool
Body includes：
To be the bit of pth+1 after m bits, and extension per P bit expandeds in data flow to m
Bit is identical with the 1st bit, 1≤p≤m.
Alternatively, demodulated by 2 P powers of the pulse amplitude modulation PAM exponent numbers by the OLT
The data with PAM-N contrasts sent, are specifically included：
By whole data flow in units of m, it is divided into multiple sub-data flows, abandons in each sub-data flow
The bit of pth+1 to m bits, new data flow is reformulated, for the ONU with PAM
Exponent number is demodulated for F.
The embodiment of the present invention is further illustrated with reference to specific application scenarios, by taking N=8 as an example
Illustrate.
PON system descending of the present invention is modulated using the multistage PAM of unicast, such as PAM-2 ranks,
PAM-4 ranks, PAM-8 ranks etc., by TDMA (Time Division Multiplexing Access,
Time division multiplexing access) form, meet ONU link circuit self-adapting different brackets rate requirements.
As shown in figure 3, by taking 10G photoelectric devices as an example, passing through PAM-2 ranks, PAM-4 ranks, PAM-8
The different modulating such as rank exponent number can realize the corresponding link level speed of descending 10G, 20G, 30G
(PAM-2 ranks correspondence 10G, PAM-4 ranks correspondence 20G, PAM-8 ranks correspondence 30G).The present invention
PON has self-adaptation flexible characteristic, can be according to ONU received optical power Adaptive matchings
PAM exponent numbers, dynamic adjustment modulation format, realize each ONU links different brackets transmission rate.
Due to directly being modulated descending using different PAM exponent numbers, descending can not realize continuously can be caused
Pattern, and burst mode is in descending more difficult implementation.How on the basis of descending continuous mode is ensured, adopt
It is the key solved the problems, such as that elastic power budget is realized with different PAM order of modulation.We by
OLT sending sides carry out coding extension, and descending different PAM exponent numbers can be achieved and continuously transmit.
As descending 30G, directly it can be modulated using PAM-8.Coding is not required to do coding extension, often
3 bits, one level of formation.As shown in Figure 4.
, need to be using PAM-4 modulation, if without any processing, descending need as descending 20G
Constantly switch between PAM-4, PAM-8, cause downlink burst.The present invention is encoded by innovating
Extension, 111,101,010,000 are extended to by the 11 of PAM-4,10,01,00 respectively.From
And form the pseudo- PAM-4 modulated signals that essence is PAM-8.As shown in Figure 5.
Similarly, as descending 10G, it need to be modulated using PAM-2, if without any processing,
It is then descending constantly to switch between PAM-2, PAM-8, cause downlink burst.Compiled by innovating
Code extension, 111,000 are extended to by the 1 of PAM-2,0 respectively.It is PAM-8 so as to form essence
Pseudo- PAM-2 modulated signals.As shown in Figure 6.
Coding extension, can be sent by descending continuous P AM-8 forms more than, realized and produced not
Same PAM exponent numbers, i.e. PAM-8, PAM-4, PAM-2.So as to real descending different rates
(PAM-8 correspondence 30G, PAM-4 correspondence 20G, PAM-2 correspondences 10G) TDMA is sent,
ONU receiving sides carry out adaptive decoding according to PAM exponent numbers.Meanwhile, above specific coding extension can
Maximum extinction ratio state under different PAM order of modulation is realized, to greatest extent lifting system performance.
Further, OLT ends extended coding can pass through FPGA (Field Programmable Gate
Array, field programmable gate array) module realization, naturally it is also possible to use special integrated chip
(Application Specific Integrated Circuit, ASIC), can also use System on Chip/SoC
(System on Chip, SoC), can also using central processing unit (Central Processor Unit,
CPU), network processing unit (Network Processor, NP) can also be used, number can also be used
Word signal processing circuit (Digital Signal Processor, DSP), can also use microcontroller
(Micro Controller Unit, MCU), can also use programmable controller (Programmable
Logic Device, PLD) or other integrated chips.It is illustrated in figure 7 downlink data stream encryption expansion
Open up schematic flow sheet.
For realizing schematic diagram as shown in Fig. 8 a~Fig. 8 c inside different PAM-N order of modulation.It is first right
Descending serial data stream Data carries out serioparallel exchange, according to OLT MAC (Media Access
Control, medium education) the affiliated PAM exponent numbers value of feedback data stream, to parallel after conversion
Data flow carries out adaptive coding extension.
As shown in Figure 8 a, coding extension is from PAM-8 to PAM-8, parallel data stream after coding extension
Keep constant；
As shown in Figure 8 b, coding extension is from PAM-4 to PAM-8, and parallel data stream encryption extension is every
2bit expands to 3bit, and 3bit is identical with 1bit data；
As shown in Figure 8 c, coding extension is from PAM-2 to PAM-8, and parallel data stream encryption extension is every
1bit expands to 3bit, and 2bit, and 3bit is identical with 1bit data.
Parallel data stream forms new downlink data through parallel-serial conversion DeSerdes again after coding extension
Data is flowed, afterwards again through 3Bit DAC (Digital Analog Convert, digital analog converter) formation
PAM-8 signals, send through laser.
As shown in figure 9, doing the transmission coding extension of adaptive PAM exponent numbers inside OLT MAC.
As shown in Figure 10, the demodulation of ONU receiving terminals is by two kinds of implementation methods, and the first is embodiment three
Being realized by FPGA described in kind.Second of implementation method is by high-speed ADC (Analog
Digital Convert, analog-digital converter) multistage PAM codings are realized, fed back by ONU MAC
Dynamic modulation exponent number controls adaptive decoding ADC sample frequencys.When feedback modulation exponent number is PAM-8
When, ADC sample frequencys are adaptively set to 30GHz；When feedback modulation exponent number is PAM-4,
ADC sample frequencys are adaptively set to 20GHz；When feedback modulation exponent number is PAM-2, ADC
Sample frequency is adaptively set to 10GHz.It is that difference can be achieved by the adaptively sampled frequencies of ADC
PAM exponent number adaptive decodings.
Embodiment two
The embodiment of the invention also discloses a kind of communicator, as shown in figure 11, including：
Processing unit 110, for determining that pulse amplitude modulation PAM exponent numbers are F, F is p time of 2
Side, 1≤p≤m；The PAM exponent numbers F for being additionally operable to determine this expands to PAM N contrast systems；
Transmitting element 120, for being that F feeds back to optical network unit ONU by the PAM exponent numbers；
Communicated with the PAM N rank modulation formats after extension with ONU.
Alternatively, the processing unit 110 is additionally operable to expand to PAM N ranks with PAM2 ranks coding
Coding realizes ONU registration.Wherein, the processing unit 110 is additionally operable to encode with PAM2 ranks
The registration that PAM N ranks coding realizes ONU is expanded to, specifically includes and expands every 1 bit in data flow
Open up as m bits, and the 2nd bit after extension is identical with the 1st bit to m bits.
The processing unit 110 is additionally operable to expand to the pulse amplitude modulation PAM exponent numbers F
PAM-N exponent numbers, will be specifically included after will in data flow per P bit expandeds being m bits, and extension
The bit of pth+1 is identical with the 1st bit to m bits, 1≤p≤m.
The communicator can be FPGA (Field Programmable Gate on physical entity
Array field programmable gate arrays) module realize can certainly use special integrated chip
(Application Specific Integrated Circuit, ASIC), can also use System on Chip/SoC
(System on Chip, SoC), can also using central processing unit (Central Processor Unit,
CPU), network processing unit (Network Processor, NP) can also be used, number can also be used
Word signal processing circuit (Digital Signal Processor, DSP), can also use microcontroller
(Micro Controller Unit, MCU), can also use programmable controller (Programmable
Logic Device, PLD) or other integrated chips.
Embodiment three
A kind of communicator is also disclosed in the embodiment of the present invention, as shown in figure 12, including：
Receiving unit 122, the pulse amplitude modulation PAM for receiving optical line terminal OLT transmission
Exponent number is F, and wherein F is 2 P powers, and wherein p is more than or equal to 1, and less than or equal to m
Integer；The data with PAM-N contrasts that the OLT is sent are received, wherein, N is 2
M powers, wherein m are the integer more than or equal to 2；
Processing unit 124, for the demodulation by F of the pulse amplitude modulation PAM exponent numbers by described
The data with PAM-N contrasts that OLT is sent, wherein p is the integer more than or equal to 1.
Alternatively, the processing unit 124 is additionally operable to expand to PAM N ranks with PAM2 ranks coding
Coding registration, wherein, N is 2 m powers, and wherein m is the integer more than or equal to 2.Specific bag
It is the 2nd after m bits, and extension by every 1 bit expanded in data flow to include the processing unit 124
Bit is identical with the 1st bit to m bits.
Alternatively, the processing unit 124 is additionally operable to whole data flow in units of m, is divided into many
Individual sub-data flow, abandons the bit of pth+1 in each sub-data flow to m bits, reformulates new
Data flow, be demodulated for the ONU using PAM exponent numbers as F.
The communicator can be FPGA (Field Programmable Gate on physical entity
Array, field programmable gate array) module realization, naturally it is also possible to use special integrated chip
(Application Specific Integrated Circuit, ASIC), can also use System on Chip/SoC
(System on Chip, SoC), can also using central processing unit (Central Processor Unit,
CPU), network processing unit (Network Processor, NP) can also be used, number can also be used
Word signal processing circuit (Digital Signal Processor, DSP), can also use microcontroller
(Micro Controller Unit, MCU), can also use programmable controller (Programmable
Logic Device, PLD) or other integrated chips.
Example IV
A kind of optical line terminal OLT is also disclosed in the embodiment of the present invention, as shown in figure 13, the OLT
Including processor 130, optical module 132, digital analog converter 134, analog-digital converter 136, wherein,
The processor includes the communicator as described in embodiment two.
It is as shown in figure 14, described the embodiment of the invention also discloses a kind of optical network unit ONU
ONU include processor 140, optical module 142, digital analog converter 144, analog-digital converter 146,
Wherein, the processor includes the communicator as described in embodiment three.
A kind of passive optical network PON is also disclosed in the embodiment of the present invention, as shown in figure 1, including light
Road terminal OLT and optical network unit ONU, the OLT are connected to by Optical Distribution Network ODN
A few ONU, wherein, optical line terminal and optical network unit are used to perform as described in embodiment one
Method.
By communication means disclosed by the invention, apparatus and system, descending PAM not same orders can be achieved
Number continuous modulation, realizes different ONU adaptive links speed grades.
Through the above description of the embodiments, it is apparent to those skilled in the art that
The present invention can be realized with hardware, or firmware is realized, or combinations thereof mode is realized.When using
When software is realized, above-mentioned functions can be stored in computer-readable medium or as computer-readable
One or more instructions or code on medium are transmitted.Computer-readable medium is deposited including computer
Storage media and communication media, wherein communication media include being easy to transmit to another place from a place
Any medium of computer program.Storage medium can be any usable medium that computer can be accessed.
As example but it is not limited to：Computer-readable medium can include RAM (Random Access
Memory, random access memory), ROM (Read Only Memory, read-only memory), EEPROM
(Electrically Erasable Programmable Read Only Memory, electric erazable programmable is only
Read memory), CD-ROM (Compact Disc Read Only Memory, i.e. read-only optical disc)
Or other optical disc storages, magnetic disk storage medium or other magnetic storage apparatus or can be used in carry
Storage with instruction or data structure form desired program code and can be by computer access
Any other medium.In addition.Any connection can be suitably turn into computer-readable medium.For example,
If software be using coaxial cable, optical fiber cable, twisted-pair feeder, DSL (Digital Subscriber Line,
Digital subscriber line) or such as wireless technology of infrared ray, radio and microwave etc from website,
What server or other remote sources were transmitted, then coaxial cable, optical fiber cable, twisted-pair feeder, DSL
Or the wireless technology of such as infrared ray, wireless and microwave etc be included in belonging to medium it is fixing in.
As used in the present invention, plate and dish include CD (Compact Disc, compress laser disc), laser disc,
Laser disc, DVD dish (Digital Versatile Disc, digital universal light), floppy disk and Blu-ray Disc,
The replicate data of the usual magnetic of which disk, and dish is then with laser come optical replicate data.Group above
Conjunction should also be as being included within the protection domain of computer-readable medium.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention not office
Be limited to this, any one skilled in the art the invention discloses technical scope in, can
Change or replacement are readily occurred in, should be all included within the scope of the present invention.Therefore, it is of the invention
Protection domain described should be defined by scope of the claims.
Claims (21)
- A kind of communication means, it is characterised in that including：It is F to determine pulse amplitude modulation PAM exponent numbers, wherein, F is 2 P powers, 1≤P≤m； The pulse amplitude modulation PAM exponent numbers F is fed back into optical network unit ONU；The pulse amplitude modulation PAM exponent numbers F is expanded into PAM exponent numbers for N ranks, using institute Expansion PAM N exponent numbers are stated to communicate with the ONU, wherein, the N is 2 m powers, m >=2.
- According to the method described in claim 1, it is characterised in that methods described also includes with PAM 2 ranks coding expands to the registration that PAM N ranks coding realizes ONU.
- Method according to claim 2, it is characterised in that the PAM2 ranks coding expands Open up and encoded for PAM N ranks, specifically included：It is the 2nd bit after m bits, and extension by every 1 bit expanded in data flow to m ratios It is special identical with the 1st bit.
- According to the method described in claim 1, it is characterised in that described by the impulse amplitude Modulation PAM exponent numbers F expands to PAM exponent numbers for N ranks, specifically includes：To be the bit of pth+1 after m bits, and extension per P bit expandeds in data flow to m Bit is identical with the 1st bit, 1≤p≤m.
- A kind of method of communication, it is characterised in that including：The data with PAM N contrasts that optical line terminal OLT is sent are received, wherein, N is 2 M powers, wherein m >=2；By F of pulse amplitude modulation PAM exponent numbers demodulation by the OLT send with PAM N ranks The data of modulation, wherein, F is 2 p powers, 1≤p≤m.
- According to the method described in claim 1, it is characterised in that methods described also includes：Optical line terminal ONU expands to the coding registration of PAM N ranks with PAM2 ranks coding, wherein, N is 2 m powers, wherein m >=2.
- Method according to claim 6, it is characterised in that the PAM2 ranks coding expands Open up and encoded for PAM N ranks, specifically included：It is the 2nd bit after m bits, and extension by every 1 bit expanded in data flow to m ratios It is special identical with the 1st bit.
- Method according to claim 5, it is characterised in that methods described also includes：By whole data flow in units of m, it is divided into multiple sub-data flows, abandons in each sub-data flow The bit of pth+1 to m bits, new data flow is formed, for the ONU with PAM ranks Number is demodulated for F ranks.
- A kind of communicator, it is characterised in that described device includes：Processing unit, for determining that pulse amplitude modulation PAM exponent numbers are F ranks, F is P time of 2 Side, 1≤P≤m integer；Transmitting element, for being that F ranks feed back to optical-fiber network by the pulse amplitude modulation PAM exponent numbers Unit ONU；The processing unit, is additionally operable to the pulse amplitude modulation PAM exponent numbers F expanding to PAM N exponent numbers, are communicated using the PAM N exponent numbers after the extension with the ONU, wherein, the N For 2 m powers, m >=2.
- Device according to claim 9, it is characterised in that the processing unit is additionally operable to Encoded with PAM2 ranks and expand to the registration that PAM N ranks coding realizes ONU.
- Device according to claim 10, it is characterised in that the processing unit is also used The registration that PAM N ranks coding realizes ONU is expanded in being encoded with PAM2 ranks, is specifically included：It is the 2nd bit after m bits, and extension by every 1 bit expanded in data flow to m ratios It is special identical with the 1st bit.
- Device according to claim 9, it is characterised in that the processing unit is additionally operable to The pulse amplitude modulation PAM exponent numbers F is expanded into PAM N exponent numbers, specifically included：To be the bit of pth+1 after m bits, and extension per P bit expandeds in data flow to m Bit is identical with the 1st bit, 1≤p≤m.
- A kind of communicator, it is characterised in that described device includes：Receiving unit, the data with PAM N contrasts for receiving optical line terminal OLT transmission, Wherein, N is 2 m powers, wherein m >=2；Processing unit, for the demodulation by F of the pulse amplitude modulation PAM exponent numbers by the OLT The data with PAM N contrasts sent, wherein, F is 2 p powers, 1≤p≤m.
- Device according to claim 13, it is characterised in that the processing unit is also used Registered in expanding to PAM N ranks coding with PAM2 ranks coding, wherein, N is 2 m powers, Wherein m >=2.
- Device according to claim 14, it is characterised in that the processing unit is specific For being the 2nd bit after m bits, and extension by every 1 bit expanded in data flow to m bits It is identical with the 1st bit.
- Device according to claim 13, it is characterised in that the processing unit is also used In whole data flow in units of m, to be divided into multiple sub-data flows, abandon in each sub-data flow The bit of pth+1 forms new data flow, for the ONU with PAM exponent numbers to m bits It is demodulated for F.
- A kind of communicator, including processor, it is characterised in that the processor is used to perform Method as described in Claims 1 to 4 any one.
- A kind of communicator, including processor, it is characterised in that the processor is used to perform Method as described in claim 5~8 any one.
- A kind of optical line terminal OLT, including processor and optical module, it is characterised in that described Processor includes the device as described in claim 9~12 any one.
- A kind of optical network unit ONU, including processor and optical module, it is characterised in that described Processor includes the device as described in claim 13~16 any one.
- A kind of passive optical network PON, including optical line terminal OLT and optical network unit ONU, Characterized in that, the OLT includes optical line terminal as claimed in claim 19 or described ONU includes optical network unit as claimed in claim 20.
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| PCT/CN2014/077647 WO2015172375A1 (en) | 2014-05-16 | 2014-05-16 | Communication method, device and system |
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| CN112564851B (en) * | 2019-09-10 | 2022-03-08 | 华为技术有限公司 | Method, device and computer readable storage medium for Ethernet link rate switching |
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| WO2015172375A1 (en) | 2015-11-19 |
| CN105359433B (en) | 2017-11-17 |
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