CN102439998A - Passive optical network system and downlink transmission method thereof - Google Patents
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- H—ELECTRICITY
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- H04J14/0278—WDM optical network architectures
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
- H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
- H04J14/0245—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU
- H04J14/0246—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU using one wavelength per ONU
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
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- H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
- H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
- H04J14/0245—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU
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- H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
- H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
- H04J14/0249—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU
- H04J14/0252—Sharing one wavelength for at least a group of ONUs, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
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Abstract
The embodiment of the invention discloses a passive optical network system and a downlink transmission method thereof. The passive optical network system comprises an optical line terminal, an optical distribution network and a plurality of optical network units. The optical line terminal is used to send a downlink multi-wavelength optical signal composed of a plurality of downlink optical signal wavelength division multiplexing having different wavelengths, and the optical distribution network comprises a first-stage optical splitter, a plurality of second-stage optical splitters and a plurality of filter modules. The first-stage optical splitter is used to divide a downlink multi-wavelength signal sent by the optical line terminal into a plurality of downlink multi-wavelength signals, the plurality of filter modules are used to carry out filter processing on the plurality of downlink multi-wavelength signals to obtain a downlink single wavelength optical signal of which the wavelength corresponds to a channel central wavelength; wherein, the channel central wavelengths of the plurality of filter modules respectively correspond to the plurality of downlink optical signals having different wavelengths, the second-stage optical splitters are used to carry out spectral processing on the downlink single wavelength signal and then provide the downlink single wavelength signal to the optical network unit.
Description
Technical field
The present invention relates to EPON (PON, Passive Optical Network) technology, relate to a kind of passive optical network and downlink transmission method thereof especially.
Background technology
Passive optical network can comprise at least one optical line terminal (OLT; Optical Line Terminal), a plurality of optical network unit (ONU; Optical Network Unit) and an Optical Distribution Network (ODN, Optical Distribution Network).Said OLT is connected to said a plurality of ONU through said ODN with the form of putting multiple spot, and communicates with mode and a plurality of ONU of time division multiplexing (TDM, Time Division Multiplexing).
EPON development so far owing to its low cost, safeguard simple and can provide very high advantages such as bandwidth to obtain application widely.But along with the appearance of new business, the user grows with each passing day to the demand of bandwidth, and conventional P ON system adopts TDM mechanism, and service bandwidth receives great restriction.In order to satisfy the demand of user to bandwidth; Need upgrade to PON, and PON upgrading means and will the equipment among the PON be replaced or upgrades, and this replacement or a large amount of cost of renewals needs; So; The PON equipment how maximum using has been disposed reduces the cost that PON upgrades, and realizes that smooth upgrade becomes the problem that must must consider.
The PON equipment of having disposed comprises ONU and ODN, and this two-part equipment and O&M cost account for more than 2/3 of total cost usually.Therefore, how the maximization use has been disposed in escalation process ONU and ODN equipment seem particularly important in the smooth upgrade process of PON.Prior art solves the existing problem of deployment facility of maximum using through replacing to the first order light-dividing device among the PON mixing optical splitter (Hybrid Splitter); And this mode of prior art can only be carried out the integral body upgrading to PON, can not upgrade flexibly according to the needs of particular user.
Summary of the invention
The embodiment of the invention provides a kind of passive optical network, to solve the flexible upgrade problem of EPON; Simultaneously, the embodiment of the invention also provides a kind of downlink transmission method of above-mentioned passive optical network.
A kind of passive optical network that the embodiment of the invention provides comprises optical line terminal, Optical Distribution Network and a plurality of optical network unit; Said optical line terminal is connected to said a plurality of optical network unit through said Optical Distribution Network; Said optical line terminal is used to send one tunnel descending multiple wavelength optical signal, and said descending multiple wavelength optical signal is formed by the downlink optical signal wavelength division multiplexing of a plurality of different wave lengths; Said Optical Distribution Network comprises first order optical splitter, a plurality of second level optical splitter and a plurality of filtration module; The corresponding respectively said a plurality of second level optical splitter that connects of the branch port of said first order optical splitter, said a plurality of filtration modules are coupling in respectively between the branch port of the said first order optical splitter second level optical splitter corresponding with it; Said first order optical splitter is used for the descending multi-wavelength signals of a road descending multi-wavelength signals demultiplexing with said optical line terminal transmission; Said a plurality of filtration module is used for the descending multiple wavelength optical signal of said multichannel is carried out Filtering Processing; Obtain the corresponding descending single wavelength light signal of wavelength and its channel center's wavelength, the channel center wavelength of wherein said a plurality of filtration modules corresponding respectively the downlink optical signal of said a plurality of different wave lengths; Said second level optical splitter is used for said descending single wavelength light signal is carried out offering corresponding optical network unit respectively after the light-splitting processing.
The downlink transmission method of a kind of passive optical network that the embodiment of the invention provides comprises:
Reception is from the descending multiple wavelength optical signal of optical line terminal, and said descending multiple wavelength optical signal is formed by the downlink optical signal wavelength division multiplexing of a plurality of different wave lengths;
Said descending multiple wavelength optical signal is carried out beam split, obtain the descending multi-wavelength signals of multichannel;
The descending multiple wavelength optical signal of said multichannel is distinguished Filtering Processing, obtain descending single wavelength light signal of a plurality of different wave lengths, wherein the downlink optical signal of one of them wavelength of the respectively corresponding said descending multiple wavelength optical signal of each descending single wavelength light signal;
Said descending single wavelength light signal is carried out offering corresponding optical network unit respectively after the light-splitting processing.
Passive optical network that the invention described above embodiment provides and the downlink transmission method in the passive optical network can utilize the equipment in the EPON of having disposed substantially; Practice thrift the upgrade cost of EPON, improve the upgrading efficient of EPON.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To make brief account to needed accompanying drawing in embodiment or the description of the Prior Art below; Clearly, the accompanying drawing in describing below only is the explanation and the some embodiments of the present invention of prior art, for the person of ordinary skill of the art; Under the prerequisite of not paying creative work, can also obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is a kind of structural representation that adopts the passive optical network of time division multiplexing mechanism;
Fig. 2 is the structural representation of the passive optical network that provides of an embodiment of the present invention;
Fig. 3 is the flow chart of the EPON downlink optical signal processing method that provides of an embodiment of the present invention;
Fig. 4 is the suitable structural representation of EPON downlink optical signal processing method that the another kind of embodiment of the present invention provides;
Fig. 5 is the flow chart of the EPON downlink optical signal processing method that provides of the another kind of embodiment of the present invention;
Fig. 6 is the suitable structural representation of EPON downlink optical signal processing method that the third embodiment of the present invention provides;
Fig. 7 is the suitable flow chart of EPON downlink optical signal processing method that the third embodiment of the present invention provides.
Embodiment
Fig. 1 is a kind of network architecture sketch map that adopts EPON (PON) system of Time Division Multiplexing mechanism.Said passive optical network can comprise optical line terminal (OLT), Optical Distribution Network (ODN) and a plurality of optical network unit (ONU).
Wherein, the direction from said OLT to said ONU is defined as down direction, and the direction from said ONU to said OLT is defined as up direction.At down direction, said OLT adopts time division multiplexing mode that downlink data is broadcast to said a plurality of ONU, and each ONU receives only the data of carrying self identification; And at up direction, said a plurality of ONU adopt time division multiple access (TDMA, Time Division Multiplexing Access) mode and said OLT to communicate, and each ONU sends upstream data in strict accordance with said OLT distributed time slot.
Said passive optical network can be a communications network system of realizing the data distribution between said OLT and the said ONU without any need for active device; Such as; In specific embodiment, the data distribution between said OLT and the said ONU can realize through the Passive Optical Components among the said ODN (such as optical splitter).And; Said passive optical network can be the ITU-T G.984 Ethernet passive optical network (EPON) or the next-generation passive optical network (NGA PON is such as XGPON or 10GEPON etc.) of the gigabit passive optical network of standard definition (GPON) system, IEEE 802.3ah standard definition of the asynchronous transfer mode EPON of standard definition (ATM PON) system or BPON (BPON) system, ITU-T G.983.The full content of the various passive optical networks of above-mentioned standard definition is combined in the present specification by reference.
Said OLT is usually located at the central office, and (Central Office, CO), they can the said a plurality of ONU of unified management, and between said ONU and upper layer network, transmit data.Specifically; This OLT can serve as the media between said ONU and the said upper layer network (such as internet, PSTN); The data forwarding that will receive from said upper layer network is to said ONU, and the data forwarding that will receive from said ONU is to said upper layer network.The concrete structure configuration of said OLT may be different because of the particular type of said EPON; Such as; In one embodiment, said OLT can comprise optical sender Tx and receiver Rx, and said transmitter is used for sending downlink optical signal to said ONU; Said receiver is used to receive the uplink optical signal from said ONU, and wherein said downlink optical signal and uplink optical signal can transmit through said ODN.
Said ONU can be arranged on user side position (such as user resident) by distributed earth.Said ONU can be the network equipment that is used for communicating with said OLT and user; Particularly; Said ONU can serve as the media between said OLT and the said user; For example, said ONU can be with the data forwarding that receives from said OLT to said user, and the data forwarding that will receive from said user is to said OLT.Should be appreciated that said ONU structure and ONT Optical Network Terminal (Optical Network Terminal, ONT) close, therefore in the scheme that present specification provides, can exchange between optical network unit and the ONT Optical Network Terminal.
Said ODN can be a data dissemination system, and it can comprise optical fiber, optical coupler, optical splitter and/or other equipment.In one embodiment; Said optical fiber, optical coupler, optical splitter and/or other equipment can be Passive Optical Components; Specifically, said optical fiber, optical coupler, optical splitter and/or other equipment can be that distribute data signals is the device that does not need power supply to support between said OLT and said ONU.In addition, in other embodiments, this ODN can also comprise one or more treatment facilities, for example, and image intensifer or trunking (Relay device).In addition, said ODN specifically can extend to said a plurality of ONU from said optical line terminal, but also can be configured to the structure of other any points to multiple spot.
To adopt optical splitter (Splitter) to realize that data are distributed as example, from the consideration of reliability and O&M aspect, said ODN can adopt the mode of two-stage beam split to dispose, and is as shown in Figure 1.With 1: 32 ODN was example; Said ODN can comprise that a splitting ratio is the second level optical splitter that 1: 4 first order optical splitter and four splitting ratios is 1: 8; Each branch port of said first order optical splitter is connected to said four second level optical splitters through optical fiber respectively accordingly, and each branch port of said second level optical splitter is connected to said a plurality of ONU through branch optical fiber respectively accordingly.After the data-signal of said OLT is divided into 4 the tunnel through first order optical splitter earlier more respectively through second level optical splitter demultiplexing and be transferred to each ONU.Said first order optical splitter is deployed in the Optical Distribution Frame nearer apart from the central office (ODF, Optical Distribution Frame) and locates, so that maintaining; And said second level optical splitter is deployed in distant-end node (RN, Remote Node) and locates, and this a part of O&M cost is higher, no longer changes for many years after often disposing.ONU equipment be usually located in the users home or near because environmental difference property is bigger, this a part of O&M cost is also higher, no longer changes for many years after also often disposing.
In the PON system; The increase of bandwidth tends to bring the change of multiplex mode; The TDM mode has obtained bigger success in PON, however since the restriction of device, the TDM mode of higher rate; Particularly the bottleneck of the high speed TDM mode under the burst mode manifests day by day, and TDM PON is difficult to the competent later development of PON.In this, a kind of novel multiplex mode---wave division multiplex mode (WDM, Wavelength Division Multiplexing) arises at the historic moment.
The embodiment of the invention provides a kind of novel passive optical network PON system, and its combination through TDM and WDM is used, and can rise to the bandwidth that the user provides greatly.Particularly; The PON system that the embodiment of the invention provides can be on existing TDM PON system-based; Local side OLT sends has the descending multiple wavelength optical signal that the downlink optical signal by a plurality of different wave lengths forms through wavelength division multiplexing; And ONU is divided into groups (such as; The ONU that is connected to same second level optical splitter can be divided into one group), each group ONU can distinguish between a downstream wavelength and the same group of ONU in the corresponding said descending multi-wavelength signals and adopts the TDM mode to share this downstream wavelength passage, and corresponding respectively different downstream wavelength and to adopt the WDM mode to carry out multiplexing between the ONU on the same group not.In addition; Said PON system can also increase the downlink optical signal that belong to other groups ONU in the said descending multi-wavelength signals of filtering module for filtering off at the optical fiber between first order optical splitter and the second level optical splitter, so that each group ONU only receives the corresponding downlink optical signal of its downstream wavelength.
The network architecture sketch map of a kind of passive optical network that Fig. 2 provides for the embodiment of the invention.Said passive optical network comprises optical line terminal OLT, Optical Distribution Network ODN and a plurality of optical network unit ONU, and wherein said OLT is connected to said a plurality of ONU through said ODN.
Said optical line terminal OLT comprises a plurality of optical sender Tx1-Tx4, multiplexer 201, duplexer 206 and optical receiver Rx.Wherein, said duplexer has three ports.Said a plurality of optical sender Tx1-Tx4 is connected with an end of multiplexer 201; The other end of multiplexer 201 is connected with one of them of duplexer 206; Another port of 206 of optical receiver Rx and duplexer is connected, and the 3rd port of duplexer 206 is connected with said ODN.Said optical sender Tx1-Tx4 has the distinct transmit wavelength; It is respectively applied for the downlink optical signal of the different downstream wavelength of emission; Thereby said multiplexer 201 is used for that a plurality of downlink optical signals that said optical sender Tx1-Tx4 launches are carried out the wavelength division multiplexing processing generates one tunnel descending multiple wavelength optical signal, and through said duplexer 206 said descending multiple wavelength optical signal is exported to said ODN.
When TDM PON system upgrade is become TDM-WDM PON system; At first will increase the number of optical sender; Number with optical sender in the present embodiment is set at 4, and therefore, said 4 optical sender Tx1-Tx4 are used to launch the downlink optical signal of 4 tunnel different downstream wavelength.In addition; Compare with TDM PON system shown in Figure 1; In the PON system that present embodiment provides, said OLT can remain unchanged for the processing of uplink optical signal, particularly; Said OLT inside only disposes an optical receiver Rx, is used to receive the uplink optical signal that is transferred to said OLT by said a plurality of ONU transmissions and through said ODN.
Said Optical Distribution Network ODN can comprise first order optical splitter 202, a plurality of filtration module 207 and a plurality of second level optical splitter 205.The common port of said first order optical splitter 202 is connected to said OLT through optical fiber; And its each branch port connects one of them filtration module 207 respectively accordingly; And further be connected to the common port of a second level optical splitter 205 accordingly through optical fiber, and each branch port of said second level optical splitter 205 is connected to different ONU through optical fiber respectively.
And; In said ODN; FBG 204 in the different filtering module 207 can have different reflection channel centre wavelength; And the reflection channel centre wavelength of each FBG 204 is the emission wavelength of one of them optical sender Tx1-Tx4 among the corresponding said OLT respectively, and promptly different FBG 204 can be with the said three port circulators 203 of downlink optical signal reflected back of the optical sender Tx1-Tx4 of corresponding emission wavelength, and the downlink optical signal of other optical senders of filtering Tx1-Tx4.
In the present embodiment, be that 1: 32 ODN is an example with branching ratio, said first order optical splitter 202 is used for the descending multiple wavelength optical signal that OLT sends is divided into 4 tunnel descending multiple wavelength optical signals; Three port circulators 203 are used for the descending multiple wavelength optical signal in each road is redirected to offer said FBG204 respectively; FBG 204 is used for said descending multi-wavelength signals medium wavelength and the said three-port circulator 203 of the corresponding downlink optical signal reflected back of its reflection channel centre wavelength, and the downlink optical signal of other wavelength in the said descending multiple wavelength optical signal of filtering; Second level optical splitter 205 is used for that the downlink optical signal that reflects after said FBG 204 filtering is divided into 8 road light signals and reaches each optical network unit ONU that is connected with the branch port of said second level optical splitter 205.
It is thus clear that; The passive optical network that present embodiment provides can be equivalent to stack PON (Stack PON) system of being piled up through the WDM mode by a plurality of TDM subsystems (each TDM PON subsystem can comprise a second level optical splitter 205 and the one group of ONU that connects thereof); And same TDM PON subsystem adopts same downstream wavelength passage, and different TDM PON subsystem adopts different downstream wavelength passages.Because said stack PON system adopts a plurality of downstream wavelength, it can realize the upgrading of user's downlink bandwidth, satisfies the user because the professional diversified demand that produces bandwidth.
Compare with TDM PON system shown in Figure 1; The stack PON system architecture that provides at present embodiment is only required in the optical sender Tx1-Tx4 that said OLT disposes a plurality of different emission and comes the transmitting downstream multiple wavelength optical signal, and comes that said descending multiple wavelength optical signal is carried out wavelength and screen the wavelength requirement of satisfying each downstream wavelength passage at the optical fiber that the branch port of said first order optical splitter 202 the connects said filtration module 207 that is coupled.Therefore; The stack PON system that present embodiment provides can form from TDM PON system smooth upgrade shown in Figure 1; Do not disposed each TDM PON subsystem (comprising the major part of said ODN and the ONU equipment of user side) and need not change; Utilize the existing PON equipment of having disposed substantially, thereby reduced the cost of PON upgrading, improved the efficient of PON upgrading.And; When the stack PON system architecture that adopts present embodiment to provide realizes the PON upgrading; Owing to need not change first order optical splitter 202; The upgrading of each TDM PON subsystem is independent mutually, therefore can only upgrade to one or part TDM PON subsystem according to the needs of particular user, thereby realize upgrading flexibly.
Based on the passive optical network that the foregoing description provides, the embodiment of the invention also further provides the downlink transmission method of EPON, and is as shown in Figure 3, comprising:
In the present embodiment; For the ease of better the invention scheme being described; The emission wavelength of supposing said a plurality of optical senders is respectively 1490nm, 1491.6nm, 1493.2nm and 1494.8nm, and then said a plurality of optical senders can send the downlink optical signal that 4 road wavelength are respectively 1490nm, 1491.6nm, 1493.2nm and 1494.8nm, in addition; Accordingly, the first order optical splitter 202 of above-mentioned ODN was respectively 1: 4 and 1: 8 with second level optical splitter 205.Should be appreciated that in the practical application and can adjust way, wavelength and the first order of downlink optical signal and the branching ratio of second level optical splitter according to actual needs.
Step 302,202 pairs of said descending multiple wavelength optical signals of first order optical splitter carry out beam split, form the descending multiple wavelength optical signal of multichannel and offer the three port circulators 203 that are connected with said first order optical splitter 202 each branch port respectively.
Wherein, the descending multiple wavelength optical signal that obtains after multiplexing is after 1: 4 first order optical splitter 202 beam split, to become 4 tunnel descending multiple wavelength optical signals through splitting ratio, and wherein, the luminous power of said 4 tunnel descending multiple wavelength optical signals can be identical.
Wherein, said three port circulators 203 have 3 ports, are respectively port one, port 2 and port 3.Said descending multiple wavelength optical signal gets into three port circulators 203 from port one, through being redirected after port 2 outputs to FBG 204.
Step 304,204 pairs of said descending multiple wavelength optical signals of FBG carry out filtering, and with the corresponding downlink optical signal reflected back of the reflection channel centre wavelength three-port circulator 203 of said descending multiple wavelength optical signal medium wavelength and said FBG 204.
Particularly; FBG 204 carries out filtering to its descending multiple wavelength optical signal that receives (comprising 1490nm, 1491.6nm, 1493.2nm and four wavelength of 1494.8nm); The downlink optical signal that only keeps one of them wavelength in the said descending multiple wavelength optical signal, and with the port 2 of the downlink optical signal reflected back three-port circulator 203 of said single wavelength.Wherein, the wavelength of the downlink optical signal of different FBG 204 reflected backs has nothing in common with each other, and thus, each three-port circulator 203 receives single wavelength downlink optical signal that wavelength is respectively 1490nm, 1491.6nm, 1493.2nm or 1494.8nm.
Through the port 2 entering three port circulators 203 of isolated single wavelength downlink optical signal behind FBG 204 reflection filters, export second level optical splitter 205 to by port 3 through being redirected the back by three port circulators 203.
Wherein, Be to become 8 road downlink optical signals after 1: 8 second level optical splitter 205 beam split by single wavelength downlink optical signal of three port circulators 203 output through splitting ratio; Wherein, the wavelength of every road downlink optical signal is identical, and the luminous power of every road downlink optical signal can be identical.Through after the beam split, said 8 road downlink optical signals reach and are connected to 8 ONU of said second level optical splitter 205 respectively, such as ONU1 to ONU8.
The network architecture sketch map of the passive optical network that Fig. 4 provides for the another kind of embodiment of the present invention, said passive optical network can carry out smooth upgrade from the said TDM PON of Fig. 1 system equally and obtain.
Passive optical network that present embodiment provides and passive optical network structure similar shown in Figure 2; The main distinction is that the filtration module 407 that is coupling in the optical fiber between first order optical splitter 402 and the second level optical splitter 406 is different with filtration module 207 structures shown in Figure 2.
In the present embodiment, the light path redirection device in the said filtration module 407 can comprise first duplexer 403 and second duplexer 405, and the two all has three ports, below is designated as port one 1,12,13 and port 21,22,23 respectively.Filtering device in the said filtration module 407 can be a dual-port narrow band filter 404, and channel center's wavelength of each dual-port narrow band filter 404 is distinguished the emission wavelength of one of them optical sender Tx1-Tx4 among the corresponding said OLT.Wherein, the port one 1 of first duplexer 403 is connected to the branch port of first order optical splitter 402; The port one 3 of first duplexer 403 is connected with the port 21 of second duplexer 405; Two ports of dual-port narrow band filter 404 are connected to the port one 2 of first duplexer 403 and the port 22 of second duplexer 405 respectively; The port 23 of second duplexer 405 is connected to the common port of second level optical splitter 406.
Based on the passive optical network that the foregoing description provides, the embodiment of the invention also further provides the downlink transmission method of another kind of EPON, and is as shown in Figure 5, comprising:
Step 502,402 pairs of descending multiple wavelength optical signals of first order optical splitter carry out beam split, form the descending multiple wavelength optical signal of multichannel and offer first duplexer 403 that is connected with said first order optical splitter 402 each branch port respectively.
Step 504,404 pairs of said descending multiple wavelength optical signals of dual-port narrow band filter carry out filtering, obtain the corresponding downlink optical signal of channel center's wavelength of said descending multiple wavelength optical signal medium wavelength and said dual-port narrow band filter 404.
Step 505,405 pairs of filtered downlink optical signals of second duplexer are redirected and export to second level optical splitter 406.
Step 506,406 pairs of said downlink optical signals of second level optical splitter are carried out beam split and are offered each ONU that is connected to said second level optical splitter 406 respectively.
The detail of each step of present embodiment can be consulted above-mentioned EPON downlink transmission method embodiment shown in Figure 3.
The network architecture sketch map of the passive optical network that Fig. 6 provides for the third embodiment of the present invention.Said passive optical network can carry out smooth upgrade from the said TDM PON of Fig. 1 system equally and obtain.
Passive optical network that present embodiment provides and passive optical network structure similar shown in Figure 2; The main distinction is that the filtration module 607 that is coupling in the optical fiber between first order optical splitter 602 and the second level optical splitter 605 is different with filtration module 207 structures shown in Figure 2.
In the present embodiment, the light path redirection device in the said filtration module 607 can be four-port circulator 603, and wherein, said four port circulators 603 have four ports, are designated as port one, port 2, port 3, port 4 respectively.Filtering device in the said filtration module 407 can be a dual-port narrow band filter 404, and channel center's wavelength of each dual-port narrow band filter 404 is distinguished the emission wavelength of one of them optical sender Tx1-Tx4 among the corresponding said OLT.Wherein, the port one of four port circulators 603 is connected to the branch port of first order optical splitter 602; Two ports of dual-port narrow band filter 604 are connected with port 3 with the port 2 of four port circulators 603 respectively; The port 4 of four port circulators is connected to the common port of second level optical splitter 406.
Four port circulators 603 are used for the wherein one tunnel descending multiple wavelength optical signal of its first order optical splitter 602 outputs is redirected to dual-port filter 604; Dual-port narrow band filter 604 is used for descending multiple wavelength optical signal is carried out filtering; The corresponding downlink optical signal of channel center's wavelength that only keeps said descending multiple wavelength optical signal medium wavelength and dual-port narrow band filter 604 after the process filtering, and the downlink optical signal of other wavelength of filtering; And four-port circulator 603 also is used for the downlink optical signal after the filtering is redirected to second level optical splitter 605.
Based on the passive optical network that the foregoing description provides, the embodiment of the invention also further provides the downlink transmission method of another EPON, and is as shown in Figure 7, comprising:
Step 702,602 pairs of descending multiple wavelength optical signals of first order optical splitter carry out beam split, form the descending multiple wavelength optical signal of multichannel and offer the four port circulators 603 that are connected with said first order optical splitter 602 each branch port respectively.
Step 704,604 pairs of said descending multiple wavelength optical signals of dual-port narrow band filter carry out filtering, obtain the corresponding downlink optical signal of channel center's wavelength of said descending multiple wavelength optical signal medium wavelength and said dual-port narrow band filter 604.
Step 706,605 pairs of downlink optical signals of second level optical splitter are carried out beam split and are offered each ONU that is connected to said second level optical splitter 605 respectively.
The detail of each step of present embodiment can be consulted above-mentioned EPON downlink transmission method embodiment shown in Figure 3.
Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential hardware platform, can certainly all implement through hardware.Based on such understanding; All or part of can the coming out that technical scheme of the present invention contributes to background technology with the embodied of software product; This computer software product can be stored in the storage medium, like ROM/RAM, magnetic disc, CD etc., comprises that some instructions are with so that a computer equipment (can be a personal computer; Server, the perhaps network equipment etc.) carry out the described method of some part of each embodiment of the present invention or embodiment.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (14)
1. a passive optical network is characterized in that, comprises optical line terminal, Optical Distribution Network and a plurality of optical network unit; Said optical line terminal is connected to said a plurality of optical network unit through said Optical Distribution Network;
Said optical line terminal is used to send one tunnel descending multiple wavelength optical signal, and said one tunnel descending multiple wavelength optical signal is formed by the downlink optical signal wavelength division multiplexing of a plurality of different wave lengths;
Said Optical Distribution Network comprises first order optical splitter, a plurality of second level optical splitter and a plurality of filtration module; Wherein, the respectively corresponding said a plurality of second level optical splitter that connects of the branch port of said first order optical splitter, said a plurality of filtration modules are coupling in respectively between the branch port of the said first order optical splitter second level optical splitter corresponding with it;
Said first order optical splitter is used for the descending multi-wavelength signals of a road descending multi-wavelength signals demultiplexing with said optical line terminal transmission;
Said a plurality of filtration module is used for the descending multiple wavelength optical signal of said multichannel is carried out Filtering Processing; Obtain the corresponding descending single wavelength light signal of wavelength and its channel center's wavelength; Wherein, the channel center wavelength of said a plurality of filtration modules corresponding respectively the downlink optical signal of said a plurality of different wave lengths;
Said second level optical splitter is used for said descending single wavelength light signal is carried out offering corresponding optical network unit respectively after the light-splitting processing.
2. passive optical network as claimed in claim 1 is characterized in that said filtration module comprises light path redirection device and filtering device;
Wherein, Said light path redirection device is used for the descending multiple wavelength optical signal of said first order optical splitter output is exported to said filtering device, and said filtering device is exported to said second level optical splitter to descending single wavelength light signal that said descending multiple wavelength optical signal carries out obtaining after the filtering;
Said filtering device is used for the said descending multiple wavelength optical signal that gets into wherein through said light path redirection device is carried out filtering, obtains said descending single wavelength light signal.
3. passive optical network as claimed in claim 2 is characterized in that, said light path redirection device is three port circulators, and said filtering device is a Fiber Bragg Grating FBG;
Wherein said three port circulators are used for the descending multiple wavelength optical signal that gets into from its first port is redirected to second port and exports said Fiber Bragg Grating FBG to, and will are redirected to the 3rd port and exported to said second level optical splitter by said Fiber Bragg Grating FBG reflected back and the descending single wavelength light signal that gets into from its second port;
Said Fiber Bragg Grating FBG is used for second port with the said three-port circulator of the corresponding light signal reflected back of the reflection channel centre wavelength of said descending multiple wavelength optical signal medium wavelength and said filtration module, and the light signal of other wavelength in the said descending multiple wavelength optical signal of filtering.
4. passive optical network as claimed in claim 3; It is characterized in that; Cascade is on the optical fiber between said first order optical splitter and the second level optical splitter respectively for first port of said three port circulators and the 3rd port, and second port of said three port circulators is connected with said Fiber Bragg Grating FBG.
5. passive optical network as claimed in claim 2 is characterized in that, said light path redirection device comprises first duplexer and second duplexer, and said filtering device is the dual-port narrow band filter;
Wherein, Said first duplexer is used for the descending multiple wavelength optical signal of said first order optical splitter output is redirected to said dual-port narrow band filter, and said second duplexer is used for the descending single wavelength light signal that obtains after the filtering of said dual-port narrow band filter is redirected to said second level optical splitter;
Said dual-port narrow band filter is used for the corresponding light signal of channel center's wavelength of said descending multiple wavelength optical signal medium wavelength and said filtration module is exported to said second duplexer, and the light signal of other wavelength in the said descending multiple wavelength optical signal of filtering.
6. passive optical network as claimed in claim 5 is characterized in that first port of said first duplexer is connected to the branch port of said first order optical splitter; The 3rd port of first duplexer is connected with first port of second duplexer; Two ports of dual-port narrow band filter are connected to second port of first duplexer and second port of second duplexer respectively; The 3rd port of second duplexer is connected to the common port of said second level optical splitter.
7. passive optical network as claimed in claim 2 is characterized in that, said light path redirection device is four port circulators, and said filtering device is the dual-port narrow band filter;
Wherein, Said four port circulators are used for the descending multiple wavelength optical signal that gets into from its first port is redirected to second port and exports to said dual-port narrow band filter, and the descending single wavelength light signal that obtains after the filtering of said dual-port narrow band filter and get into from the 3rd port is redirected to the 4th port and exports to said second level optical splitter;
Said dual-port narrow band filter is used for the corresponding light signal of reflection channel centre wavelength of said descending multiple wavelength optical signal medium wavelength and said filtration module is exported to the 3rd port of said four port circulators, and the light signal of other wavelength in the said descending multiple wavelength optical signal of filtering.
8. passive optical network as claimed in claim 7; It is characterized in that; First port of said four port circulators is connected to the branch port of said first order optical splitter; Two ports of said dual-port narrow band filter are connected with the 3rd port with second port of said four port circulators respectively, and the 4th port of said four port circulators is connected to the common port of said second level optical splitter.
9. the downlink transmission method of a passive optical network is characterized in that, comprising:
Reception is from the descending multiple wavelength optical signal of optical line terminal, and said descending multiple wavelength optical signal is formed by the downlink optical signal wavelength division multiplexing of a plurality of different wave lengths;
Said descending multiple wavelength optical signal is carried out beam split, obtain the descending multi-wavelength signals of multichannel;
The descending multiple wavelength optical signal of said multichannel is distinguished Filtering Processing, obtain descending single wavelength light signal of a plurality of different wave lengths, wherein the downlink optical signal of one of them wavelength of the respectively corresponding said descending many groups of long light signals of each descending single wavelength light signal;
Said descending single wavelength light signal is carried out offering corresponding optical network unit respectively after the light-splitting processing.
10. the downlink transmission method of passive optical network as claimed in claim 9 is characterized in that, said the descending multiple wavelength optical signal of multichannel is distinguished Filtering Processing, and the descending single wavelength light signal that obtains a plurality of different wave lengths comprises:
Utilize a plurality of filtration modules respectively the descending multiple wavelength optical signal of said multichannel to be carried out Filtering Processing; Wherein the channel center wavelength of each filtration module corresponding respectively the downlink optical signal of one of them wavelength of said descending multiple wavelength optical signal, and channel center's wavelength of different filtering module has nothing in common with each other.
11. the downlink transmission method of passive optical network as claimed in claim 10; It is characterized in that; Said filtration module comprises light path redirection device and filtering device, wherein saidly utilizes a plurality of filtration modules respectively the descending multiple wavelength optical signal of said multichannel to be carried out Filtering Processing to comprise:
Said light path redirection device wherein one tunnel descending multiple wavelength optical signal is exported to said filtering device;
Said filtering device carries out filtering to the said descending multiple wavelength optical signal that gets into wherein through said light path redirection device, obtains said descending single wavelength light signal;
Said light path redirection device receives the descending single wavelength light signal that obtains after the said filtering device filtering and exports to optical splitter and carry out light-splitting processing.
12. the downlink transmission method of passive optical network as claimed in claim 10 is characterized in that, said filtration module comprises three port circulator and Fiber Bragg Grating FBGs; Wherein saidly utilize a plurality of filtration modules respectively the descending multiple wavelength optical signal of said multichannel to be carried out Filtering Processing to comprise:
Said three port circulators will be redirected to second port and export said Fiber Bragg Grating FBG to from the descending multiple wavelength optical signal that its first port gets into;
Said Fiber Bragg Grating FBG is second port of the said three-port circulator of the corresponding light signal reflected back of the reflection channel centre wavelength of said descending multiple wavelength optical signal medium wavelength and said filtration module, and the light signal of other wavelength in the said descending multiple wavelength optical signal of filtering;
Said three port circulators will be redirected to the 3rd port and export optical splitter to and carry out light-splitting processing by said Fiber Bragg Grating FBG reflected back and from descending single wavelength light signal that its second port gets into.
13. the downlink transmission method of passive optical network as claimed in claim 10 is characterized in that, said filtration module comprises first duplexer, second duplexer and dual-port narrow band filter; Wherein saidly utilize a plurality of filtration modules respectively the descending multiple wavelength optical signal of said multichannel to be carried out Filtering Processing to comprise:
Said first duplexer is used for its descending multiple wavelength optical signal that receives is redirected to said dual-port narrow band filter;
Said dual-port narrow band filter is exported to said second duplexer with the corresponding light signal of channel center's wavelength of said descending multiple wavelength optical signal medium wavelength and said filtration module, and the light signal of other wavelength in the said descending multiple wavelength optical signal of filtering;
Said second duplexer is redirected to optical splitter with the descending single wavelength light signal that obtains after the filtering of said dual-port narrow band filter and carries out light-splitting processing.
14. the downlink transmission method of passive optical network as claimed in claim 10 is characterized in that, said filtration module comprises four port circulators and dual-port narrow band filter; Wherein, saidly utilize a plurality of filtration modules respectively the descending multiple wavelength optical signal of said multichannel to be carried out Filtering Processing to comprise:
Said four port circulators will be redirected to second port from the descending multiple wavelength optical signal that its first port gets into;
Said dual-port narrow band filter is exported to the 3rd port of said four port circulators with the corresponding light signal of channel center's wavelength of said descending multiple wavelength optical signal medium wavelength and said filtration module, and the light signal of other wavelength in the said descending multiple wavelength optical signal of filtering;
Said four-port circulator is with obtaining after the filtering of said dual-port narrow band filter and being redirected to the 4th port and exporting to said optical splitter and carry out light-splitting processing from descending single wavelength light signal that the 3rd port gets into.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2011/081226 WO2012149810A1 (en) | 2011-10-25 | 2011-10-25 | Passive optical network system and downlink transmission method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102439998A true CN102439998A (en) | 2012-05-02 |
| CN102439998B CN102439998B (en) | 2013-12-18 |
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| CN201180002222.1A Expired - Fee Related CN102439998B (en) | 2011-10-25 | 2011-10-25 | Passive optical network system and downlink transmission method thereof |
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| WO (1) | WO2012149810A1 (en) |
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Families Citing this family (1)
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1859810A (en) * | 2005-12-31 | 2006-11-08 | 华为技术有限公司 | Passive optical network of multiple optical cut-in net shared optical fiber distribution net and realizing method |
| US20090317084A1 (en) * | 2008-06-23 | 2009-12-24 | Electronics And Telecommunications Research Institute | Passive optical network system and optical signal receiving method thereof |
| CN101902293A (en) * | 2010-04-23 | 2010-12-01 | 中兴通讯股份有限公司 | Optical network system, optical line terminal, optical network unit and optical distribution network device |
| CN102075822A (en) * | 2011-01-19 | 2011-05-25 | 中兴通讯股份有限公司 | Wave division multiplexing passive optical network system, communication method and optical line terminal equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101098206B (en) * | 2006-06-26 | 2012-05-02 | 华为技术有限公司 | Passive optical network system and light path processing method |
-
2011
- 2011-10-25 WO PCT/CN2011/081226 patent/WO2012149810A1/en active Application Filing
- 2011-10-25 CN CN201180002222.1A patent/CN102439998B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1859810A (en) * | 2005-12-31 | 2006-11-08 | 华为技术有限公司 | Passive optical network of multiple optical cut-in net shared optical fiber distribution net and realizing method |
| US20090317084A1 (en) * | 2008-06-23 | 2009-12-24 | Electronics And Telecommunications Research Institute | Passive optical network system and optical signal receiving method thereof |
| CN101902293A (en) * | 2010-04-23 | 2010-12-01 | 中兴通讯股份有限公司 | Optical network system, optical line terminal, optical network unit and optical distribution network device |
| CN102075822A (en) * | 2011-01-19 | 2011-05-25 | 中兴通讯股份有限公司 | Wave division multiplexing passive optical network system, communication method and optical line terminal equipment |
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| WO2012149810A1 (en) | 2012-11-08 |
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