CN103581770A - Passive optical network signal processing method and system based on single carrier frequency division multiplexing - Google Patents
Passive optical network signal processing method and system based on single carrier frequency division multiplexing Download PDFInfo
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Abstract
The embodiment of the invention discloses a passive optical network signal processing method and system based on single carrier frequency division multiplexing. The method comprises the following steps: all uplink data from all optical network units to an optical line terminal are subjected to modulation and encoding processing; after the modulation and encoding processing, a multipoint control mechanism is used for conducting time division processing on the processed uplink data transmitted by all the optical network units; the uplink data, subjected to the time division processing, of all the optical network units are transmitted to the optical line terminal in a serial mode in a time domain. According to the passive optical network signal processing method and system based on single carrier frequency division multiplexing, due to the fact that the uplink data transmitted by all the optical network units are transmitted in a time division multiplexing mode, the problem of interference between the uplink data of all the optical network units cannot occur at the time of demodulation of optical line units, and the colorless problem caused by single carrier frequency division multiple access is avoided accordingly.
Description
Technical field
The present invention relates to optical communication technique field, especially, relate to a kind of based on single carrier frequency division multiplexing passive optical network signal processing method and system.
Background technology
Fibre Optical Communication Technology has become one of main pillar of modern communications, in Modern Telecommunication net, play a part very important, fast, the application surface of its development in recent years speed be extensively that communication is rarely seen in history, be also the main means of transportation of various information in the important symbol of new worldwide technological revolution and Future Information society.
Optical fiber, is fibre-optic abbreviation.Optical fiber communication is to using light wave as information carrier, usings a kind of communication mode of optical fiber as transmission medium.In recent years, the application due to new technologies such as a large amount of layings of optical fiber and wavelength division multiplexing makes trunk optical fiber network within several years, have breakthrough development.Due to the progress of ethernet technology, by its leading local area network (LAN) bandwidth, also from 10M, 100M, increase to even 10G of 1G simultaneously.And everybody place that pay close attention to, that need most breakthrough is just a section between interconnection network trunk, local area network (LAN) and domestic consumer at present, Here it is " last kilometer " of often saying, this is a bottleneck, must break this bottleneck and just may welcome the new world of network world.People in the urgent need to a kind of economy, simple, easily upgrading, can comprehensive transmission voice, the new access network technology of numeral and video traffic.
In various technology, PON(Passive Optical Network, EPON) technology obtained widely and paid close attention to.The outstanding advantages of PON network is to have eliminated outdoor active equipment, and all signal processing functions complete by switch and station equipment, and the up-front investment of this access way is little, and most of fund will be postponed till when user really accesses and just drop into.Its transmission range is shorter than Active Optical Fiber connecting system, and the scope of covering is less, but its cost is low, need not separately establish machine room, easily safeguards, therefore this structure can be economically for house user provides service.
PON technology mainly contains and adopts ATM(Asynchronous Transfer Mode at present, asynchronous transfer mode) APON(ATM passive optical network, EPON based on asynchronous transfer mode), EPON(Ethernet Passive Optical Network, Ethernet passive optical network), GPON(Gigabit Passive Optical Network, Gigabit-capable Passive Optical Network) and WDM-PON(Wavelength Division Multiplex PON, Wave division multiplexing passive optical network) etc. several, its Main Differences has been to adopt different transmission technologys.Wherein, first three plants PON technology is all based on time-multiplexed, and WDM-PON is based on wavelength division multiplexing.
（1）PON：
A typical PON network architecture as shown in Figure 1, its chief component comprises OLT(Optical Line Terminator, optical line terminal), ONU(Optical Network Unit, optical network unit) and ODN(Optical Distribution Network, optical distribution).Because light path is characterized as ODN, all by passive devices such as optical branching devices (Splitter), formed, do not need valuable active electronic equipment, be therefore called as EPON.
(2) based on TDM(Time Division Multiplex, time division multiplexing) PON technology (EPON and GPON):
PON based on TDM is mainly divided into APON/BPON(Broadband PON, broadband P ON), EPON and GPON, but after only having, both are widely used at present.Wherein, EPON is applicable to the broadband access of IP operation very much, and commercialization degree is the highest.2004, IEEE approval EPON standard was 802.3ah, and its supports that up-downgoing flank speed is 1.25Gb/s, maximum along separate routes than being 64.The advantage of EPON mainly contains: (a) maturation of Ethernet, equipment cost are low; (b) equipment price is low, versatility good; (c) removed IP transfer of data agreement and format conversion, efficiency is high, management is simple, can support flexibly the management of IP-based integrated service and multiple service quality.Its shortcoming is that real-time service more complicated, service quality problem and the flow control of transmission high-quality assurance is to be strengthened.
GPON is having some superiority aspect two-forty and Supporting multi-services.Within 2003, GPON is by ITU(International Telecommunication Association) be adopted as standard G.984.The advantage of GPON mainly contains: (a) carrying Fast Ethernet and T1(1.544Mbit/s digital synchronous transmission)/E1(2.048Mbps digital synchronous transmission) circuit does not need overhead, can not increase complexity yet; (b) strong, supported vlans (Virtual Local Area Network, the VLAN) exchange of integrated service tenability and other new Ethernet services.Its shortcoming is that current cost is high compared with EPON, when only carrying Ethernet service and speech business without clear superiority.
（3）WDM-PON：
WDM-PON, based on wavelength-division multiplex technique, adopts the light of multi beam different wave length on same optical fiber simultaneously, and the light of different wave length is distributed to different business or terminal.Know-why, EPON and GPON are power Splittables, and WDM-PON belongs to wavelength division multiplexing, and (for example, the various wavelength that OLT) send, distribute to each road optical node (for example, ONU) by signal to use optical branching device identification local side.The advantage of WDM-PON is that it can realize higher bandwidth of operation, aspect network management and system upgrade, have certain advantage, but that its shortcoming is cost is very high, apart from industrialization and large-scale application, also have a very long segment distance.
(4) based on OFDMA(Orthogonal Frequency Division Multiple Access, orthogonal frequency division multiplexing multiple access) PON technology:
Since two thousand seven, academia enters on a kind of novel PON technology based on OFDMA.OFDMA is based on OFDM(Orthogonal Frequency Division Multiplex, OFDM) access technology of technology.In OFDM technology, channel is divided into some orthogonal sub-channels, converts high-speed data signal to parallel low speed sub data flow, is modulated on every sub-channels and transmits.Orthogonal signalling can, by adopting Digital Signal Processing to separate at receiving terminal, can reduce the ICI(Inter-Carrier Interference between subchannel, inter-carrier interference like this).
PON system configuration based on OFDMA as shown in Figure 2.Fig. 2 a shows the sending end structure schematic diagram of OFDMA-PON.As shown in Figure 2 a, at transmitting terminal, signal is through QAM(Auadrature Amplitude Modulation, quadrature amplitude modulation) or PSK(Phase Shift Keying, phase shift keying) after mapping, obtain QAM modulation symbol or PSK and adjust symbol, then by IDFT(Inverse Discrete Fourier Transform, inverse discrete Fourier transformer inverse-discrete) convert the signal into time domain, again it is carried out to up-conversion, finally by crossing the conversions of digital-to-analogue conversion and electric light, signal is sent by optical fiber.Fig. 2 b shows the receiving terminal structural representation of OFDMA-PON.As shown in Figure 2 b, receiving terminal is its inverse process.This technology can realize very high spectrum efficiency, anti-linear disturbance ability is strong, and can adopt special DSP chip transmitting and receiving end, realizes simple.
But, because OFDMA-PON adopts multi-carrier modulation, make multicarrier exist homophase to be added or the phenomenon that disappears mutually, when being added, homophase can produce very large peak value, cause PAPR(Peak to Average Power Ratio, papr) very large.Therefore the linear work district of modulator and power amplifier is larger, has improved the cost of photoelectric device, has especially improved the cost of ONU end, and excessive PAPR will introduce nonlinear fiber, and this is all very disadvantageous for uplink and downlink link transmission performance.
(5) based on SCFDMA(Single-Carrier Frequency-Division Multiple Access, single-carrier frequency division multiple access) PON technology:
SCFDMA technology is a kind of mutation of OFDMA technology, be different from OFDMA-PON structure, in SCFDMA-PON, DFT(Discrete Fourier Transform has all been passed through in transmitting of uplink and downlink, discrete Fourier transform (DFT)) and IDFT, transmitting is the time-domain signal of single carrier, the problem that the homophase while not there is not multi-carrier modulation is added or disappears mutually, thus still can keep very little PAPR.SCFDMA-PON is more much lower than OFDMA-PON for transmitter amplifier performance requirement, has embodied obvious advantage.In optical-fiber network, need to utilize optical fiber to transmit, the PAPR of SCFDMA-PON is less, and the peak value of power is also just less, and corresponding nonlinear impairments is just less.
But, there is a serious problem in SCFDMA-PON, owing at frequency domain, resource being divided on up direction, make a plurality of ONU of up direction send light signal, at OLT end, separate timing and can produce interference, cause colourless property (colorless) problem, therefore need additionally ONU to be carried out to wavelength management.
Summary of the invention
The technical problem that the embodiment of the present invention will solve is to provide a kind of based on single carrier frequency division multiplexing passive optical network signal processing method and system, can solve colourless property problem, without additionally ONU being carried out to wavelength management.
It is a kind of based on the multiplexing passive optical network signal processing method of single carrier frequency division that one embodiment of the present of invention provide, and comprises each optical network unit to optical line terminal Ge road upstream data is modulated with coding and processed; After modulation and coding are processed, the divisional processing when upstream data each optical network unit after processing being sent by multiple spot controlling mechanism carries out; In time domain by serial mode by time each optical network unit after divisional processing upstream data be sent to optical line terminal.
Another embodiment of the present invention provides a kind of and has comprised optical network unit based on the multiplexing passive optical network signal treatment system of single carrier frequency division, for optical network unit to optical line terminal Ge road upstream data being modulated with coding, processes; Time divisional processing unit, after processing at modulation and coding, the divisional processing when upstream data each optical network unit after processing being sent by multiple spot controlling mechanism carries out; Upstream data transmitting element, in time domain by serial mode by time each optical network unit after divisional processing upstream data be sent to optical line terminal.
The embodiment of the present invention provide based on single carrier frequency division multiplexing passive optical network signal processing method and system, owing to transmitting the upstream data of each optical network unit transmission by time division multiplexing mode, therefore at optical line unit solution timing, just there will not be the upstream data interference problem of each optical network unit, and then the colourless property problem of having avoided single-carrier frequency division multiple access to produce.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part.In the accompanying drawings:
Fig. 1 is a typical PON network architecture schematic diagram.
Fig. 2 a shows the sending end structure schematic diagram of OFDMA-PON.
Fig. 2 b shows the receiving terminal structural representation of OFDMA-PON.
Fig. 3 is the schematic flow sheet that the present invention is based on an embodiment of the multiplexing passive optical network signal processing method of single carrier frequency division.
Fig. 4 a is the upstream data waveform schematic diagram of ONU1.
Fig. 4 b is the upstream data waveform schematic diagram of ONU2.
Fig. 4 c is ONU1 after the present invention processes and the upstream data waveform schematic diagram of ONU2.
Fig. 5 is the schematic flow sheet that the present invention is based on another embodiment of the multiplexing passive optical network signal processing method of single carrier frequency division.
Fig. 6 is TDM-SCFDM-PON system configuration schematic diagram.
Fig. 7 is the schematic flow sheet that the present invention is based on an embodiment of the multiplexing passive optical network signal modulation of single carrier frequency division and coding processing.
Fig. 8 is the schematic flow sheet that the present invention is based on an embodiment of the multiplexing passive optical network signal demodulation of single carrier frequency division and decoding processing.
Fig. 9 is the structural representation that the present invention is based on an embodiment of the multiplexing passive optical network signal treatment system of single carrier frequency division.
Figure 10 is the structural representation that the present invention is based on another embodiment of the multiplexing passive optical network signal treatment system of single carrier frequency division.
Embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention is wherein described.Exemplary embodiment of the present invention and explanation thereof are used for explaining the present invention, but do not form inappropriate limitation of the present invention.
To the description only actually of at least one exemplary embodiment, be illustrative below, never as any restriction to the present invention and application or use.
In order to overcome the technical problem existing in prior art, the following embodiment of the present invention proposed a kind of on up direction based on single carrier frequency division multiplexing passive optical network signal processing method and system, it is different from SFDMA-PON, the method adopts the multiplexing mode combining with time division multiplexing of single carrier frequency division to transmit SCFDM to meet on up direction with system, owing to adopting time-multiplexed mode, therefore between different ONU, can not produce interference, thereby overcome colourless property problem.
Fig. 3 is the schematic flow sheet that the present invention is based on an embodiment of the multiplexing passive optical network signal processing method of single carrier frequency division.
As shown in Figure 3, this embodiment can comprise the following steps:
S302, modulates with coding and processes each optical network unit to optical line terminal Ge road upstream data;
S304, after modulation and coding are processed, the divisional processing when upstream data each optical network unit after processing being sent by multiple spot controlling mechanism carries out, in order to improve spectrum efficiency, the subcarrier of all bandwidth of synchronization all can be distributed to same user, certainly, according to the data volume size of transmission, also some subcarriers or a few subcarriers can be distributed to a user simultaneously;
S306, in time domain by serial mode by time each optical network unit after divisional processing upstream data be sent to optical line terminal.
This embodiment is owing to transmitting the upstream data of each optical network unit transmission by time division multiplexing mode, therefore at optical line unit solution timing, just there will not be the upstream data interference problem of each optical network unit, and then the colourless property problem producing while having avoided single-carrier frequency division multiple access.
When the upstream data wherein, by multiple spot controlling mechanism, each optical network unit after processing being sent in step S304 carries out, the step of divisional processing can be specially: according to the bandwidth of distributing for each optical network unit, set the shared duration of each optical network unit; Duration based on setting is each optical network unit distribute data sending time slots.
As shown in Figure 4, the upstream data waveform schematic diagram that Fig. 4 a is ONU1, the upstream data waveform schematic diagram that Fig. 4 b is ONU2; Fig. 4 c is ONU1 after the present invention processes and the upstream data waveform schematic diagram of ONU2.Wherein, transverse axis is time shaft, and the longitudinal axis is data signal strength.
As can be seen from Figure 4, different ONU adopt the multiplexing modulation of single carrier frequency division, and adopt time division multiplexing mode to carry out up access, therefore between different ONU, can not produce phase mutual interference, solved the colourless property problem of ONU, reduce cost and the complexity of ONU simultaneously, and retained the spectral efficient of SCFDM.
Embodiment in Fig. 3 shows the up direction data sending processing method to optical line terminal from optical network unit, on down direction, and the embodiment of the transmission processing method of data as shown in following Fig. 5.
Fig. 5 is the schematic flow sheet that the present invention is based on another embodiment of the multiplexing passive optical network signal processing method of single carrier frequency division.
As shown in Figure 5, this embodiment can comprise the following steps:
S502, modulates with coding and processes optical line terminal to the downlink data of each optical network unit;
S504, after modulation and coding are processed, optical line terminal is sent to each optical network unit by broadcast mode by the downlink data after processing;
S506, each optical network unit receives one's own data according to identifier entrained in downlink data, and abandons the data that belong to other optical network units.
Particularly, on down direction, optical line terminal can send downlink data to each optical network unit based on single carrier frequency division multiplex mode, can to each optical network unit, send downlink data based on time division multiplexing mode, can also to each optical network unit, send downlink data based on the multiplexing mode combining with time division multiplexing of single carrier frequency division.
While all adopting based on the multiplexing mode combining with time division multiplexing of single carrier frequency division, between OLT and ONU, transmit the mode of data as shown in Figure 6 in uplink and downlink direction.
In Fig. 6, OLT comprises SCFDM transmitting element and SCFDM receiving element, and each ONU also comprises corresponding SCFDM transmitting element and SCFDM receiving element.As can be seen from Figure 6, upstream data and downlink data all adopt time division multiplexing mode to send, like this on up direction, just can phase mutual interference when OLT receives the data that a plurality of ONU send.
Fig. 7 is the schematic flow sheet that the present invention is based on an embodiment of the multiplexing passive optical network signal modulation of single carrier frequency division and coding processing.
As shown in Figure 7, the modulation that this embodiment can realize in above-mentioned steps S302 and step S502 is processed with coding, specifically comprises the following steps:
Step 2, carries out S/P(Serial/Parallel to the sequence that meets generating, and goes here and there and changes);
Step 3, carries out M point DFT by generated parallel symbol sequence, generates frequency-region signal;
Step 4, inserts nil symbol, by subcarrier, is shone upon each frequency-region signal is mapped on the subcarrier of distribution, wherein, can adopt centralized subcarrier mapping, also can adopt distributed sub-carrier mapping;
Step 5, transforms to time domain by the frequency-region signal after subcarrier mapping through N point IDFT, and wherein, M, N are natural number, N >=M;
Step 6, adds CP(Cyclic Prefix, Cyclic Prefix by the time-domain signal obtaining), to eliminate intersymbol interference, and reduce synchronous requirement;
Step 7, carries out P/S(Parallel/Serial, parallel-serial conversion by the signal obtaining);
Step 8, passes through LPF(Low Pass Filter, low pass filter by the signal after parallel-serial conversion);
Step 9 obtains light signal successively by the signal obtaining after up-conversion, digital-to-analogue conversion, electrooptic modulation.
This embodiment compares with Fig. 2, processes the larger problem of peak-to-average force ratio producing in the time of therefore can overcoming multi-carrier modulation owing to having carried out DFT and IDFT.
On the down direction of OLT to ONU, adopt broadcast mode light signal to be mail to the receiving element of all ONU, each ONU receives one's own Frame and forwards according to identifier, abandon the Frame of other ONU, wherein, this identifier is for identifying uniquely each ONU simultaneously, this identifier can have various ways, for example, MAC Address etc., can place it in frame head.
On the up direction of ONU to OLT, can at OLT, be each ONU distribution assigned timeslot by multiple spot controlling mechanism, the light signal of each ONU is mail to the receiving element of OLT according to time sequencing, wherein, by each ONU is found range and realizes multiple spot controlling mechanism, the object of ONU range finding is compensation due to ONU and the different propagation delay time difference causing of distance between OLT, make all ONU identical with the logical reach of OLT, and then just can not occur again the problem of signal interference between different ONU when each ONU is carried out to time slot allocation.
Fig. 8 is the schematic flow sheet that the present invention is based on an embodiment of the multiplexing passive optical network signal demodulation of single carrier frequency division and decoding processing.By this embodiment, OLT can realize the reception & disposal of upward signal and ONU are realized to the reception & disposal to downstream signal.
As shown in Figure 8, this embodiment can comprise the following steps:
Step 2, this time-domain signal passes through LPF;
Step 3, removes time-domain signal to Cyclic Prefix;
Step 4, carries out N point DFT to time-domain signal and transforms to frequency domain;
Step 5, carries out frequency domain equalization to frequency-region signal, to correct to a certain extent error code;
Step 6, takes out zero insertion, and the frequency-region signal obtaining is carried out to subcarrier inverse mapping, obtains being loaded with the subcarrier of data, wherein, can adopt centralized subcarrier inverse mapping, also can adopt distributed sub-carrier inverse mapping;
Step 7, carries out M point IDFT by the frequency-region signal in subcarrier and transforms to time domain, and wherein, M, N are natural number, N >=M;
Step 8, carries out parallel-serial conversion (P/S) to time-domain signal;
Step 9, carries out QAM or PSK demodulation to the time-domain signal after P/S conversion.
This embodiment compares with Fig. 2, processes the larger problem of peak-to-average force ratio producing in the time of therefore can overcoming multi-carrier modulation owing to having carried out DFT and IDFT.
One of ordinary skill in the art will appreciate that, whole and the part steps that realizes said method embodiment can complete by the relevant hardware of program command, aforesaid program can be stored in a computing equipment read/write memory medium, this program is when carrying out, execution comprises the step of said method embodiment, and aforesaid storage medium can comprise the various media that can be program code stored such as ROM, RAM, magnetic disc and CD.
Fig. 9 is the structural representation that the present invention is based on an embodiment of the multiplexing passive optical network signal treatment system of single carrier frequency division.
As shown in Figure 9, the system 90 in this embodiment can comprise optical network unit 902, time divisional processing unit 904 and upstream data transmitting element 906.
Wherein, 902 pairs of optical network units of optical network unit to optical line terminal Ge road upstream data is modulated with coding and is processed; After modulation and coding are processed, time divisional processing unit 904 upstream data that each optical network unit after processing sent by multiple spot controlling mechanism divisional processing while carrying out; Upstream data transmitting element 906 in time domain by serial mode by time each optical network unit after divisional processing upstream data be sent to optical line terminal.
Particularly, time divisional processing unit 904 can set the shared duration of each optical network unit according to the bandwidth of distributing for each optical network unit, the duration based on setting is each optical network unit distribute data sending time slots.
Figure 10 is the structural representation that the present invention is based on another embodiment of the multiplexing passive optical network signal treatment system of single carrier frequency division.
As shown in figure 10, system 100 in this embodiment can also comprise optical line terminal 1002,1002 pairs of optical line terminals of this optical line terminal to the downlink data of each optical network unit is modulated with coding and is processed, after modulation and coding are processed, by broadcast mode, the downlink data after processing is sent to each optical network unit; In addition, optical network unit also receives one's own data according to identifier entrained in downlink data, and abandons the data that belong to other optical network units.
Particularly, optical line terminal 1002 can send downlink data to each optical network unit based on single carrier frequency division multiplex mode, can to each optical network unit, send downlink data based on time division multiplexing mode, can also to each optical network unit, send downlink data based on the multiplexing mode combining with time division multiplexing of single carrier frequency division.
In this specification, each embodiment all adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that part identical with similar between each embodiment can cross-references.For device embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part can be referring to the explanation of embodiment of the method part.
The above embodiment of the present invention is compared with EPON/GPON technology, can realize very high spectrum efficiency, anti-linear disturbance ability is strong, and all can adopt special-purpose DSP(Digital Signal Processing, Digital Signal Processing at transmitting terminal and receiving terminal) chip, realize simple; Compare with OFDMA-PON/SCFDMA-PON technology, without ONU wavelength is managed, reduced cost and the implementation complexity of ONU.
Although specific embodiments more of the present invention are had been described in detail by example, it should be appreciated by those skilled in the art, above example is only in order to describe, rather than in order to limit the scope of the invention.It should be appreciated by those skilled in the art, can without departing from the scope and spirit of the present invention, above embodiment be modified.Scope of the present invention is limited by claims.
Claims (12)
1. based on the multiplexing passive optical network signal processing method of single carrier frequency division, it is characterized in that, comprising:
Each optical network unit to optical line terminal Ge road upstream data is modulated with coding and processed;
After modulation and coding are processed, the divisional processing when upstream data described each optical network unit after processing being sent by multiple spot controlling mechanism carries out;
In time domain by serial mode by time described each optical network unit after divisional processing upstream data be sent to described optical line terminal.
2. according to claim 1 based on the multiplexing passive optical network signal processing method of single carrier frequency division, it is characterized in that, when the described upstream data described each optical network unit after processing being sent by multiple spot controlling mechanism carries out, the step of divisional processing is specially:
According to the bandwidth of distributing for described each optical network unit, set the shared duration of each optical network unit;
Duration based on setting is described each optical network unit distribute data sending time slots.
3. according to claim 1ly based on the multiplexing passive optical network signal processing method of single carrier frequency division, it is characterized in that, described method also comprises:
Described optical line terminal to the downlink data of described each optical network unit is modulated with coding and processed;
After modulation and coding are processed, described optical line terminal is sent to described each optical network unit by broadcast mode by the downlink data after processing;
Described each optical network unit receives one's own data according to identifier entrained in downlink data, and abandons the data that belong to other optical network units.
4. according to claim 3ly based on the multiplexing passive optical network signal processing method of single carrier frequency division, it is characterized in that, described optical line terminal sends downlink data based on single carrier frequency division multiplex mode to described each optical network unit.
5. according to claim 3ly based on the multiplexing passive optical network signal processing method of single carrier frequency division, it is characterized in that, described optical line terminal sends downlink data based on time division multiplexing mode to described each optical network unit.
6. according to claim 3 based on the multiplexing passive optical network signal processing method of single carrier frequency division, it is characterized in that, described optical line terminal sends downlink data based on the multiplexing mode combining with time division multiplexing of single carrier frequency division to described each optical network unit.
7. based on the multiplexing passive optical network signal treatment system of single carrier frequency division, it is characterized in that, comprising:
Optical network unit, processes for described optical network unit to optical line terminal Ge road upstream data being modulated with coding;
Time divisional processing unit, after processing at modulation and coding, the divisional processing when upstream data each optical network unit after processing being sent by multiple spot controlling mechanism carries out;
Upstream data transmitting element, in time domain by serial mode by time described each optical network unit after divisional processing upstream data be sent to described optical line terminal.
8. according to claim 7 based on the multiplexing passive optical network signal treatment system of single carrier frequency division, it is characterized in that, when described, divisional processing unit is set the shared duration of each optical network unit according to the bandwidth of distributing for described each optical network unit, and the duration based on setting is described each optical network unit distribute data sending time slots.
9. according to claim 7 based on the multiplexing passive optical network signal treatment system of single carrier frequency division, it is characterized in that, described system also comprises optical line terminal, for described optical line terminal to the downlink data of described each optical network unit is modulated with coding and is processed, after modulation and coding are processed, by broadcast mode, the downlink data after processing is sent to described each optical network unit;
Described optical network unit, also for receiving one's own data according to the entrained identifier of downlink data, and abandons the data that belong to other optical network units.
10. according to claim 9ly based on the multiplexing passive optical network signal treatment system of single carrier frequency division, it is characterized in that, described optical line terminal sends downlink data based on single carrier frequency division multiplex mode to described each optical network unit.
11. according to claim 9ly is characterized in that based on the multiplexing passive optical network signal treatment system of single carrier frequency division, and described optical line terminal sends downlink data based on time division multiplexing mode to described each optical network unit.
12. is according to claim 9 based on the multiplexing passive optical network signal treatment system of single carrier frequency division, it is characterized in that, described optical line terminal sends downlink data based on the multiplexing mode combining with time division multiplexing of single carrier frequency division to described each optical network unit.
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| CN104079521A (en) * | 2014-07-02 | 2014-10-01 | 上海交通大学 | Energy saving orthogonal frequency-division multiplexing passive optical network based on simplified FFT operation technology |
| CN105450575A (en) * | 2015-10-05 | 2016-03-30 | 上海大学 | Energy-saving transmission method of downlink data of OFDM-PON |
| CN105721383A (en) * | 2016-02-25 | 2016-06-29 | 上海大学 | Identification code-based selective demodulating and energy-saving OFDM-PON method |
| CN106160989A (en) * | 2015-04-23 | 2016-11-23 | 上海贝尔股份有限公司 | EPON is used for the enhanced method and device of capacity |
| CN107005455A (en) * | 2014-12-18 | 2017-08-01 | T移动美国公司 | Route tunnel for transmission network |
| CN108347326A (en) * | 2017-01-24 | 2018-07-31 | 中兴通讯股份有限公司 | The transmission method and device of data |
| WO2019184819A1 (en) * | 2018-03-30 | 2019-10-03 | 华为技术有限公司 | Signal transmission method for passive optical network, and related devices |
| CN115865221A (en) * | 2022-11-30 | 2023-03-28 | 四川天邑康和通信股份有限公司 | PON network BOSA device interference shielding device, method and system |
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| CN106160989B (en) * | 2015-04-23 | 2021-03-19 | 上海诺基亚贝尔股份有限公司 | Method and device for capacity enhancement in passive optical network |
| CN105450575B (en) * | 2015-10-05 | 2019-08-20 | 上海大学 | A kind of OFDM-PON downlink data power save transmission method |
| CN105450575A (en) * | 2015-10-05 | 2016-03-30 | 上海大学 | Energy-saving transmission method of downlink data of OFDM-PON |
| CN105721383A (en) * | 2016-02-25 | 2016-06-29 | 上海大学 | Identification code-based selective demodulating and energy-saving OFDM-PON method |
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| CN115865221A (en) * | 2022-11-30 | 2023-03-28 | 四川天邑康和通信股份有限公司 | PON network BOSA device interference shielding device, method and system |
| CN115865221B (en) * | 2022-11-30 | 2024-04-19 | 四川天邑康和通信股份有限公司 | PON network BOSA device interference shielding method and system |
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