CN102638434A - OFDMA (orthogonal frequency division multiple access)-based fusion access network system - Google Patents
OFDMA (orthogonal frequency division multiple access)-based fusion access network system Download PDFInfo
- Publication number
- CN102638434A CN102638434A CN2012100860314A CN201210086031A CN102638434A CN 102638434 A CN102638434 A CN 102638434A CN 2012100860314 A CN2012100860314 A CN 2012100860314A CN 201210086031 A CN201210086031 A CN 201210086031A CN 102638434 A CN102638434 A CN 102638434A
- Authority
- CN
- China
- Prior art keywords
- centroid
- ofdm signal
- ofdma
- conversion
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses an OFDMA (orthogonal frequency division multiple access)-based fusion access network system. A core network is connected with a user terminal by means of an OFDMA single-fiber ring and a plurality of OFDMA single-fiber trees, so that a metropolitan area network and an access network are effectively fused together. Simultaneously, when the OFDMA single-fiber ring is practically configured, central nodes in corresponding number can be increased in an existing OFDMA single-fiber ring according to practical needs of the user terminal, and addition by the means has no influence on normal operation of other configured central nodes, therefore, the OFDMA-based fusion access network system is excellent in expansibility and flexibility, and can adapt to the trend of ever-increasing network information capacity in modern society.
Description
Technical field
The invention belongs to the optical communication technique field, more specifically, relate to a kind of fusion access net system based on OFDMA.
Background technology
In recent years; Versatile and flexible along with the becoming increasingly abundant of the quick increase of message capacity, communication service, communications applications demand; Traditional metropolitan area network and Access Network independent communication pattern can not adapt to the communication network present situation of current develop rapidly; Also can not satisfy the great demand of people, thereby seek a kind of new network architecture that can address the above problem and become the significant challenge that following metropolitan area network and access technology field are faced the network information of continuous expansion.Along with the generation information network industry is classified as " 12 " key strategy property new industry, China has worked out the development plan of national broadband, has begun to move towards the road of the exploration of the generation information network industry gradually.
Traditional metropolitan area network is to communicate independent separating with Access Network, and metropolitan area network is mainly realized functions such as the professional carrying of high bandwidth, exchange, distribution, and Access Network is then mainly realized the far-end access function of business datum.In order to comply with the Next Generation Internet growth requirement of network flattening, integrated services carrying, the fusion of metropolitan area network and Access Network and the unified development trend that has been inevitable.Metropolitan area network is merged with Access Network mutually; Break through the independent communication pattern of traditional metropolitan area network and Access Network; Can reach efficiency and utilize the target of optimization, transmission channel transparence, network integrationization; Thereby greatly reduce construction cost, promoted the development of low-carbon (LC) network and green communications technology simultaneously.
OFDM (Orthogonal Frequency-Division Multiple; Abbreviation OFDM) technology is a kind of multi-carrier modulation technology; It adopts hundreds of or even several thousand narrow-band sub-carriers to carry out high speed data transfer; Wherein each subcarrier has carried corresponding Bit data, is mutually orthogonal between them.
OFDM (Orthogonal Frequency Division Multiple Access is called for short OFDMA) is the basis with OFDM, distributes the subcarrier of some to realize that the multi-user inserts through giving each user.OFDMA is except the advantage of inheriting OFDM; Also has distribution mechanism very flexibly; Can be according to the quantity of the big or small dynamic assignment subcarrier of subscriber traffic; And can on different subcarriers, use different modulation and coded system and transmitting power to reduce interference, increase power system capacity; Simultaneously, be not only the effective ways of realizing high spectrum utilization, and have opposing chromatic dispersion and polarization mode dispersion ability, therefore, adopt this technology can satisfy the broadband access and the low-cost demand of following optical-fiber network based on the modulation technique of OFDM.
The FP7 research project in Europe has proposed the integration program of a kind of metropolitan area network and Access Network, i.e. " Scalable Advanced Ring-based passive Dense Access Network Architecture (SARDANA) ".In this scheme; Concentrate and adopted wavelength division multiplexing (Wavelength Division Multiplexing is called for short WDM) and these two kinds of technology of time division multiple access (Time Division Multiple Access is called for short TDMA) to make up metropolitan area network and Access Network emerging system; For N ring node; Select for use 2N wavelength to carry out transmitted in both directions and exchange, and finally signal is linked into user terminal with the mode of time division multiplexing (Time-Division Multiplexing, be called for short TDM).The characteristics of this integration program are that it can be good at being complementary with existing technical standard and can on the existing communications infrastructure, upgrading at an easy rate; But towards more long-range network development demand, the flexibility that this integration program exists exchange to insert is lower, TDM requires harsh, long-range transmission to receive chromatic dispersion etc. to influence deficiencies such as big to time synchronized.
In addition; In the optical fiber communication OFC meeting that 2009 (the Optical Society of America of Optical Society of America) holds; The people such as Wei Wei of U.S. NEC experiment have proposed a kind of novel metropolitan area network system based on the OFDMA loop technique; The light OFDMA metropolitan area network (An Optical OFDMA Metro Ring Network with Dynamic Sub-carrier Allocation) that promptly distributes based on dynamic sub carrier; This metropolitan area network system utilizes the subcarrier dynamic assignment technology among the OFDMA to realize the flexibility of information exchange and distribution well; Realized the high availability of frequency spectrum and flexibility, let us has enjoyed the transparency of optical system transmission and huge bandwidth to the full.Simultaneously, because this metropolitan area network system to the support of QoS flexibly, makes that the structure of node is also relatively simple and efficient.But this scheme only is the improvement to metropolitan area network, does not relate to how merging with Access Network.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of fusion access net system based on OFDMA be provided, metropolitan area network and Access Network are effectively merged, have simultaneously can expand, high performance flexibly and cheaply.
For realizing the foregoing invention purpose, the present invention is based on the fusion access net system of OFDMA, it is characterized in that comprising: an OFDMA single fiber ring that connects core net and user terminal is set with several OFDMA single fibers;
OFDMA single fiber ring comprises a central office CO and n Centroid CN
_ i, wherein, i=1,2 ..., n; Central office CO and Centroid CN
_ 1, Centroid CN
_ jWith next Centroid CN
_ j+1And Centroid CN
_ nWith all be connected between the CO of central office by the optical fiber of an one-way transmission identical with closure, wherein, j=1,2 ..., n-1;
Central office CO directly links to each other with core net, is responsible for dressing up from the data set of core net being fit to each Centroid CN
_ iThe form of transmission and exchange; And the loading subcarrier, promptly inverse fast Fourier transform, upward frequency conversion, steering D/A conversion and electricity/light conversion is carried out in modulation then; Obtain the light ofdm signal, the light ofdm signal that obtains is along passing the transmission of OFDMA single fiber ring and downloading: at Centroid CN
_ iIn, the light ofdm signal of importing is divided into two-way through beam splitter, one tunnel process light/electricity conversion, mould/number conversion become the digital signal in electric territory; This digital signal is then carried out fast Fourier transform through after the down-conversion, obtains sub-carrier signal, then; Select the corresponding sub-carrier signal of this node to carry out demodulation, carry out the subcarrier dynamic assignment after the demodulation, select new subcarrier to modulate; Carry out inverse fast Fourier transform after the modulation; Carry out up-conversion at last and through D/A and electricity/descending smooth ofdm signal of light conversion becoming, after amplify through image intensifer on another road, through with next Centroid CN
_ i+1The optical fiber of the one-way transmission that connects is passed to next Centroid CN
_ i+1
OFDMA single fiber tree connects some Centroid CN through coupler for using two-way single fiber
_ iCorresponding several far-end node with it, i.e. user terminal and the tree structure that constitutes is responsible for Centroid CN
_ iThe long distance of the descending smooth ofdm signal of output is sent to each user terminal, will feed back to Centroid CN from the light ofdm signal of each user terminal simultaneously
_ i, constitute up smooth ofdm signal; This tree structure is based on that the characteristics of OFDM long-distance passive optical network (Passive Optical Network, be called for short PON) design;
At Centroid CN
_ iIn; Up smooth ofdm signal is through the digital signal that light/electricity is changed, mould/number conversion becomes electric territory, and this digital signal is then carried out fast Fourier transform through after down-conversion, obtains sub-carrier signal and carries out demodulation; Carry out the subcarrier dynamic assignment after the demodulation; Select new subcarrier to modulate, carry out inverse fast Fourier transform after the modulation, carry out up-conversion at last and become new up smooth ofdm signal through D/A and the conversion of electricity/light; This new up smooth ofdm signal is coupled on the optical fiber of one-way transmission through coupler;
In the CO of central office, to from each Centroid CN
_ iNew up smooth ofdm signal handle after, send to core net.
Goal of the invention of the present invention is achieved in that
The present invention is based on the fusion access net system of OFDMA, core net and user terminal are coupled together, metropolitan area network and Access Network are effectively merged through OFDMA single fiber ring and several OFDMA single fiber trees.Simultaneously; In actual disposition OFDMA single fiber ring; Can in conventional OFDMA single fiber ring, increase the Centroid of respective number according to the actual demand of user terminal, such interpolation can not influence the operate as normal of other Centroids that configured, thereby; Have extraordinary autgmentability and flexibility, can adapt to the growing trend of current community network information capacity.
Simultaneously, the fusion access net system that the present invention is based on OFDMA also has following beneficial effect:
(1), through using choosing of OFDMA technology and subcarrier, realized the seamless fusion of metropolitan area network and Access Network, broken through the pattern of metropolitan area network and Access Network independent communication traditionally;
(2), use the OFDMA technology in the Centroid, compare with the SARDANA structure that the FP7 research project in Europe proposes, have more flexibility, and realized the high availability of frequency spectrum.Simultaneously, from the Centroid to the user terminal, use the OFDMA technology to realize that far-end inserts, when realizing high flexibility, synchronous requirement has also been reduced like this, can adapt to the main trend that network communication capacity grows with each passing day;
(3), use the OFDMA technology to realize that the far-end from the Centroid to the user terminal inserts; Compare with the OFDMA metro ring of propositions such as U.S. NEC experiment, expanded network configuration, realized the seamless fusion of metropolitan area network and Access Network; Developing construction separately with metropolitan area network and Access Network compares; Simplified network configuration greatly, practiced thrift cost, made that the integrated degree of network is higher.
Description of drawings
Fig. 1 is a kind of embodiment Organization Chart of fusion access net system that the present invention is based on OFDMA;
Fig. 2 is a kind of embodiment structure chart of Centroid shown in Figure 1;
Fig. 3 is a kind of embodiment structure chart of user terminal shown in Figure 1.
Embodiment
Describe below in conjunction with the accompanying drawing specific embodiments of the invention, so that those skilled in the art understands the present invention better.What need point out especially is that in the following description, when perhaps the detailed description of known function and design can desalinate main contents of the present invention, these were described in here and will be left in the basket.
Embodiment
Describe for ease, earlier the relevant speciality term that occurs in the embodiment described:
OFDM (Orthogonal Frequency Division Multiplexing): OFDM;
OFDMA (Orthogonal Frequency Division Multiple Access): OFDM inserts;
CO (Central Office): central office;
CN (Central Node): Centroid;
RN (Remote Node): distant-end node;
FFT (Fast Fourier Transform): fast Fourier transform;
IFFT (Inverse Fast Fourier Transform): inverse fast Fourier transform;
PD (Photodiode): photodiode;
RSOA (Reflective Semiconductor Optical Amplifier): reflective semiconductor optical amplifier;
Fig. 1 is a kind of embodiment Organization Chart of fusion access net system that the present invention is based on OFDMA.
In the present embodiment, as shown in Figure 1, the present invention is based on what connect core net and user terminal in the fusion access net system of OFDMA is that an OFDMA single fiber ring is set with several OFDMA single fibers.Need to prove,, only provided two OFDMA single fiber trees, promptly with Centroid CN for succinctly
_ i, Centroid CN
_ jThe OFDMA single fiber tree that is connected, the OFDMA single fiber tree of all the other Centroids has been given omission.
As shown in Figure 1, OFDMA single fiber ring comprises a central office CO and n Centroid CN
_ i, wherein, i=l, 2 ..., n; Central office CO and Centroid CN
_ 1, Centroid CN
_ jWith next Centroid CN
_ j+1And Centroid CN
_ nWith all be connected between the CO of central office by the optical fiber of an one-way transmission identical with closure, n is the number of intermediate node.In the present embodiment, the light ofdm signal in the optical fiber of one-way transmission along direction shown in Figure 1 from the central office CO to Centroid CN
_ 1, arrive Centroid CN then
_ 2Central office CO is returned in transmission more successively.
Data are down direction by the direction that core net flows to user terminal, and data then are up direction by the direction that user terminal flows to core net.
As shown in Figure 1, the central office CO in the OFDMA single fiber ring directly links to each other with core net, and central office CO is responsible for being fit to each Centroid CN with dressing up from the data set of core net
_ iThe form of transmission and exchange, and load subcarrier, promptly inverse fast Fourier transform, upward frequency conversion, steering D/A conversion and electricity/light conversion is carried out in modulation then, obtains the light ofdm signal, and the light ofdm signal that obtains is along passing the transmission of OFDMA single fiber ring and downloading.And each Centroid CN
_ iThen can be distributed in the optional position in the OFDMA single fiber ring, be responsible for transmission and download from the core net and the light ofdm signal that need upload to core net.Each Centroid has all carried all data from core net, and promptly the light ofdm signal includes all data from core net.In the present embodiment, the subcarrier of light ofdm signal is a single wavelength.
In actual disposition OFDMA single fiber ring; Can be according to remote subscriber; It is the actual demand of user terminal increases respective number in the conventional OFDMA ring Centroid; Such interpolation can not influence the operate as normal of other Centroids that configured, thereby fusion access net system based on OFDMA of the present invention has extraordinary autgmentability, can adapt to the growing trend of current community network information capacity.
As shown in Figure 1, OFDMA single fiber tree connects some Centroid CN through coupler for using two-way single fiber
_ iCorresponding several far-end node with it, i.e. user terminal and the tree structure that constitutes is responsible for Centroid CN
_ iThe long distance of the descending smooth ofdm signal of output is sent to each user terminal, will feed back to Centroid CN from the light ofdm signal of each user terminal simultaneously
_ i, constitute up smooth ofdm signal.
Fig. 2 is Centroid one an embodiment structure chart shown in Figure 1.
As shown in Figure 2, in the present embodiment, at Centroid CN
_ iIn, the light ofdm signal of importing is divided into two-way through beam splitter.One the tunnel through the digital signal that light/electricity is changed, mould/number conversion becomes electric territory, and this digital signal is then carried out fast Fourier transform, i.e. IFFT conversion through after down-conversion; Obtain sub-carrier signal; Then, select the corresponding sub-carrier signal of this node to carry out demodulation, carry out the subcarrier dynamic assignment after the demodulation; Select new subcarrier to modulate; Carry out inverse fast Fourier transform after the modulation, carry out up-conversion at last and, be sent to each user terminal through OFDMA single fiber tree then through D/A and electricity/descending smooth ofdm signal of light conversion becoming; After amplify through image intensifer on another road, through with next Centroid CN
_ i+1The optical fiber of the one-way transmission that connects is passed to next Centroid CN
_ i+1
Light ofdm signal from each user terminal feeds back to Centroid CN
_ i, constitute up smooth ofdm signal.At Centroid CN
_ iIn; Up smooth ofdm signal is through the digital signal that light/electricity is changed, mould/number conversion becomes electric territory, and this digital signal is then carried out fast Fourier transform through after down-conversion, obtains sub-carrier signal and carries out demodulation; Carry out the subcarrier dynamic assignment after the demodulation; Select new subcarrier to modulate, carry out inverse fast Fourier transform after the modulation, carry out up-conversion at last and become new up smooth ofdm signal through D/A and the conversion of electricity/light; This new up smooth ofdm signal is coupled on the optical fiber of one-way transmission through coupler.
Fig. 3 is a kind of embodiment structure chart of user terminal shown in Figure 1.
In the present embodiment, as shown in Figure 3, distant-end node RN is exactly a user terminal, directly links to each other with OFDMA single fiber tree, comprising:
One optical coupler is used for descending smooth ofdm signal is divided into two bundles;
One photodetector and ofdm demodulator, a branch of descending smooth ofdm signal that optical coupler is told is sent into and is carried out opto-electronic conversion in the photodetector, and the electric ofdm signal that obtains is sent into demodulation in the ofdm demodulator, obtains the downlink data that the user needs;
One OFDM modulator, the OFDM modulator is modulated upstream data, obtains upgoing O FDM signal;
One reflective semiconductor optical amplifier; The a branch of descending smooth ofdm signal that optical coupler branches away gets into reflective semiconductor optical amplifier RSOA; Thereby wipe the descending ofdm signal that carries on this light ofdm signal, produce pure up light carrier, be input to then among the reflective semiconductor optical amplifier RSOA; Upgoing O FDM signal loading is formed up smooth ofdm signal to the pure up light carrier that produces, through optical coupler up smooth ofdm signal is sent in the OFDMA single fiber tree again.
In the present embodiment, the maximum characteristics of user terminal are exactly its passivity,
Although above the illustrative embodiment of the present invention is described; So that the technical staff in present technique field understands the present invention, but should be clear, the invention is not restricted to the scope of embodiment; To those skilled in the art; As long as various variations appended claim limit and the spirit and scope of the present invention confirmed in, these variations are conspicuous, all utilize innovation and creation that the present invention conceives all at the row of protection.
Claims (3)
1. the fusion access net system based on OFDMA is characterized in that comprising: the OFDMA single fiber ring and several OFDMA single fibers tree that connect core net and user terminal;
OFDMA single fiber ring comprises a central office CO and n Centroid CN
_ i, wherein, i=1,2 ..., n; Central office CO and Centroid CN
_ 1, Centroid CN
_ jWith next Centroid CN
_ j+1And Centroid CN
_ nWith all be connected between the CO of central office by the optical fiber of an one-way transmission identical with closure, wherein, J=1,2 ..., n-1;
Central office CO directly links to each other with core net, is responsible for dressing up from the data set of core net being fit to each Centroid CN
_ iThe form of transmission and exchange; And the loading subcarrier, promptly inverse fast Fourier transform, upward frequency conversion, steering D/A conversion and electricity/light conversion is carried out in modulation then; Obtain the light ofdm signal, the light ofdm signal that obtains is along passing the transmission of OFDMA single fiber ring and downloading: at Centroid CN
_ iIn, the light ofdm signal of importing is divided into two-way through beam splitter, one tunnel process light/electricity conversion, mould/number conversion become the digital signal in electric territory; This digital signal is then carried out fast Fourier transform through after the down-conversion, obtains sub-carrier signal, then; Select the corresponding sub-carrier signal of this node to carry out demodulation, carry out the subcarrier dynamic assignment after the demodulation, select new subcarrier to modulate; Carry out inverse fast Fourier transform after the modulation; Carry out up-conversion at last and through D/A and electricity/descending smooth ofdm signal of light conversion becoming, after amplify through image intensifer on another road, through with next Centroid CN
_ i+1The optical fiber of the one-way transmission that connects is passed to next Centroid CN
_ i+1
OFDMA single fiber tree connects some Centroid CN through coupler for using two-way single fiber
_ iCorresponding several far-end node with it, i.e. user terminal and the tree structure that constitutes is responsible for Centroid CN
_ iThe long distance of the descending smooth ofdm signal of output is sent to each user terminal, will feed back to Centroid CN from the light ofdm signal of each user terminal simultaneously
_ i, constitute up smooth ofdm signal; This tree structure is based on that the characteristics of OFDM long-distance passive optical network (Passive Optical Network, be called for short PON) design;
At Centroid CN
_ iIn; Up smooth ofdm signal is through the digital signal that light/electricity is changed, mould/number conversion becomes electric territory, and this digital signal is then carried out fast Fourier transform through after down-conversion, obtains sub-carrier signal and carries out demodulation; Carry out the subcarrier dynamic assignment after the demodulation; Select new subcarrier to modulate, carry out inverse fast Fourier transform after the modulation, carry out up-conversion at last and become new up smooth ofdm signal through D/A and the conversion of electricity/light; This new up smooth ofdm signal is coupled on the optical fiber of one-way transmission through coupler;
In the CO of central office, to from each Centroid CN
_ iNew up smooth ofdm signal handle after, send to core net.
2. the fusion access net system based on OFDMA according to claim 1 is characterized in that the subcarrier of described ofdm signal is a single wavelength.
3. the fusion access net system based on OFDMA according to claim 1 is characterized in that described user terminal comprises:
One optical coupler is used for descending smooth ofdm signal is divided into two bundles;
One photodetector and ofdm demodulator, a branch of descending smooth ofdm signal that optical coupler is told is sent into and is carried out opto-electronic conversion in the photodetector, and the electric ofdm signal that obtains is sent into demodulation in the ofdm demodulator, obtains the downlink data that the user needs;
One OFDM modulator, the OFDM modulator is modulated upstream data, obtains upgoing O FDM signal;
One reflective semiconductor optical amplifier; The a branch of descending smooth ofdm signal that optical coupler branches away gets into reflective semiconductor optical amplifier RSOA; Thereby wipe the descending ofdm signal that carries on this light ofdm signal, produce pure up light carrier, be input to then among the reflective semiconductor optical amplifier RSOA; Upgoing O FDM signal loading is formed up smooth ofdm signal to the pure up light carrier that produces, through optical coupler up smooth ofdm signal is sent in the OFDMA single fiber tree again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210086031.4A CN102638434B (en) | 2012-03-28 | 2012-03-28 | OFDMA (orthogonal frequency division multiple access)-based fusion access network system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210086031.4A CN102638434B (en) | 2012-03-28 | 2012-03-28 | OFDMA (orthogonal frequency division multiple access)-based fusion access network system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102638434A true CN102638434A (en) | 2012-08-15 |
| CN102638434B CN102638434B (en) | 2014-08-13 |
Family
ID=46622682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210086031.4A Expired - Fee Related CN102638434B (en) | 2012-03-28 | 2012-03-28 | OFDMA (orthogonal frequency division multiple access)-based fusion access network system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102638434B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102833206A (en) * | 2012-09-13 | 2012-12-19 | 电子科技大学 | Polarization multiplexing band interpolation based OFDMA-PON (orthogonal frequency division multiple access-passive optical network) system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070097935A1 (en) * | 2005-10-27 | 2007-05-03 | Alexei Gorokhov | In-band rate control for an orthogonal frequency division multiple access communication system |
| CN101924963A (en) * | 2010-09-21 | 2010-12-22 | 上海交通大学 | OFDMA (Orthogonal Frequency Division Multiplex Address)-based mixed passive optical network transmission system |
| CN102035789A (en) * | 2010-12-09 | 2011-04-27 | 北京邮电大学 | Optical orthogonal frequency division multiplexing (OFDM) dynamic allocation-based passive access network system and method |
-
2012
- 2012-03-28 CN CN201210086031.4A patent/CN102638434B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070097935A1 (en) * | 2005-10-27 | 2007-05-03 | Alexei Gorokhov | In-band rate control for an orthogonal frequency division multiple access communication system |
| CN101924963A (en) * | 2010-09-21 | 2010-12-22 | 上海交通大学 | OFDMA (Orthogonal Frequency Division Multiplex Address)-based mixed passive optical network transmission system |
| CN102035789A (en) * | 2010-12-09 | 2011-04-27 | 北京邮电大学 | Optical orthogonal frequency division multiplexing (OFDM) dynamic allocation-based passive access network system and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102833206A (en) * | 2012-09-13 | 2012-12-19 | 电子科技大学 | Polarization multiplexing band interpolation based OFDMA-PON (orthogonal frequency division multiple access-passive optical network) system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102638434B (en) | 2014-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Maier et al. | NG-PONs 1&2 and beyond: the dawn of the uber-FiWi network | |
| CN102036135B (en) | Orthogonal frequency division multiple access (OFDMA) passive optical network transmission system | |
| CN102025478B (en) | Method and device for transmitting and receiving data | |
| CN102724012B (en) | Light-source-shared WDM-PON (wavelength division multiplexed passive optical network) system based on suppressed carrier modulation technique | |
| CN101924963B (en) | OFDMA (Orthogonal Frequency Division Multiplex Address)-based mixed passive optical network transmission system | |
| CN106304419B (en) | Wireless forward transmission system for digital optical transmission based on multi-core optical fiber | |
| CN102820945B (en) | Based on passive optical network and the implementation method of Nyquist wavelength division multiplexing | |
| CN102075478A (en) | Signal processing method, equipment and system for passive optical network (PON) | |
| CN101640820A (en) | Orthogonal frequency division multiplexing passive optical network | |
| CN102237977A (en) | Polarized interweaving OFDM (Orthogonal Frequency Division Multiplexing)/SCFDM (Singe Carrier Frequency Division Multiplexing) passive optical network system | |
| CN109560891A (en) | Realize the method and device of wavelength-division-multiplexed optical signal branch | |
| CN104796376B (en) | The passive optical network downlink transmission system of multi-carrier modulation based on wave filter group | |
| CN102036134A (en) | OFDM (Orthogonal Frequency Division Multiplexing)-based convergence type OAN (Optical Access Network) system and method | |
| Kumari et al. | Passive optical network evolution to next generation passive optical network: a review | |
| Gupta et al. | Passive optical networks: Review and road ahead | |
| CN103297169A (en) | OFDM-PON long-distance transmission method based on comb-shaped light source regeneration technology | |
| TWI513207B (en) | A remote node device, an optical network unit, a system and a communication method thereof | |
| KR20130093788A (en) | Converged pon for tdma-pon service based on ofdma-pon | |
| CN102281118A (en) | Wavelength division multiplexing passive optical network transmission system based on optical orthogonal frequency division multiple access | |
| CN102158772B (en) | System and method for being compatible to broadcasting service in colorless wavelength division multiplexing passive optical network | |
| CN102377724A (en) | Uplink and downlink transmission system based on single-wavelength orthogonal frequency division multiple access (OFDMA) passive optical network | |
| CN101345599A (en) | Upgrading method of time division multiple access passive optical network and passive optical network system | |
| Gong et al. | Optimization mechanisms in multi-dimensional and flexible PONs: Challenging issues and possible solutions | |
| CN104427412A (en) | Method and device for updating bandwidth map | |
| CN104935383A (en) | Uplink system of subcarrier multiplexing optical network of filter based multicarrier modulation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140813 Termination date: 20170328 |