CN103746747A - Metro wavelength division convergence optical network access system and method - Google Patents
Metro wavelength division convergence optical network access system and method Download PDFInfo
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Abstract
The invention provides a metro wavelength division convergence optical network access system which is used for realizing the access of service of a plurality of far-end optical transformation units to a plurality of corresponding local side optical transformation units of an optical line terminal in a central apparatus room through a plurality of corresponding optical add drop multiplexers. The optical line terminal is sequentially connected with nodes of the optical add drop multiplexers through a single optical fiber to form a ring topology together, the local side optical transformation units of the optical line terminal and the corresponding far-end optical transformation units form upward/downward loops through the corresponding optical add drop multiplexers in the ring topology, and the wavelengths of uplink/downlink optical paths for loop transmission between far-end transmission units and the local side optical transformation units are interleaved. The wavelengths of uplink/downlink optical signals transmitted in the optical line terminal meet an interleaved arrangement relation, the influence of Rayleigh backscatter and reflection on optical signal transmission quality is avoided, and the high-quality transmission of optical signals is guaranteed. The invention also provides a metro wavelength division convergence optical network access method.
Description
Technical field
The present invention relates to metropolitan area access technology, relate in particular to the wavelength-division of a kind of metropolitan area and converge optical network access system and method.
Background technology
At present, mobile communication is progressively entering the 4G epoch, and the bandwidth demand of base station is brought up to Gb/s(G bits per second by 100,000,000 of the 2G/3G epoch) magnitude.Mobile retransmission network not only continues to require high robust and OAM(Operation Administration and Maintenance, operation, management, maintenance) ability, and need high bandwidth.In addition, big customer's special line, WiFi(Wireless Fidelity, the authentication of wireless compatibility) bandwidth requirement of focus etc. is also improving, and the demand of high bandwidth makes WDM(Wavelength Division Multiplexing, wavelength division multiplexing) technology becomes the choice direction of metropolitan area access.Operator's expectation can change fixed broadband access and converge net, mobile retransmission net and separately build the traditional mode of safeguarding, realizes " an optical fiber Full-Services access ", with simplified network, builds peacekeeping planning, management, effectively reduces costs.
Yet, the PON technology of fixed broadband access is difficult to meet mobile retransmission, the high-quality requirement of big customer's special line etc., and MSTP, the expensive technique such as PTN/IPRAN can not be applicable to the low-cost requirement of fixed broadband access, in bandwidth, promote under driving, wavelength division multiplexing (WDM, Wavelength Division Multiplexing) become gradually the metropolitan area access technology of industry approval, in the ring topology communication link forming in the simple optical fiber access that adopts wavelength-division multiplex technique to realize up/down row optical path signal between easily there is rayieigh backscatter and reflex, affect optical signal transmission quality.
Summary of the invention
In view of this, the invention provides a kind of metropolitan area wavelength-division that can improve optical signal transmission quality and converge optical network access system and method.
Optical network access system is converged in the wavelength-division of a kind of metropolitan area, it accesses to a plurality of corresponding local side light conversion unit of central machine room optical line terminal for realizing the business of a plurality of far-end light conversion unit ends by a plurality of corresponding light add-drop multiplexers, between described optical line terminal and described each optical add/drop multiplexer node, through simple optical fiber, be connected common looping topology successively, the local side light conversion unit of described optical line terminal a plurality of corresponding light add-drop multiplexers in ring topology are realized up/down row loop with corresponding far-end light conversion unit, the wavelength of up light path of loop transmission between described far-end delivery unit and described local side light conversion unit and the size of the wavelength of descending light path are for interleaving arrangement.
Optical-fiber network cut-in method is converged in the wavelength-division of a kind of metropolitan area, it accesses to a plurality of corresponding local side light conversion unit of central machine room optical line terminal for realizing the business of a plurality of far-end light conversion unit ends by a plurality of optical add/drop multiplexers, between described optical line terminal and described each optical add/drop multiplexer node, through simple optical fiber, be connected common looping topology successively, the local side light conversion unit of described optical line terminal a plurality of corresponding light add-drop multiplexers in ring topology are realized up/down row loop with corresponding far-end light conversion unit, the direction that described optical add/drop multiplexer node connects in ring topology be divided into east orientation with west to, in the direction of the clock, the east orientation of last optical add/drop multiplexer node with the west of a rear optical add/drop multiplexer node to being connected, the wavelength-division of described metropolitan area is converged optical-fiber network cut-in method and is comprised the following steps:
Under master state in ring topology light signal from described local side light conversion unit suitable/counterclockwise through corresponding light add-drop multiplexer, realize up/down row optic path with corresponding far-end light conversion unit and the size of the wavelength of uplink optical signal that transmits and the wavelength of downlink optical signal for interleaving arrangement;
Under stand-by state in ring topology light signal from described local side light conversion unit contrary/clockwise through corresponding light add-drop multiplexer, realize up/down row optic path with corresponding far-end light conversion unit and the size of the wavelength of uplink optical signal that transmits and the wavelength of downlink optical signal for interleaving arrangement.
Compared with prior art, metropolitan area provided by the invention wavelength-division is converged optical network access system and method and not only by OTU, is broken the various/PON technology of constraint for to(for) wavelength planning, / coexisting and as required upgrading for PON technology various to realize, and in optical line terminal, arrange between the up/down traveling optical signal wavelength of transmission and meet and interleave Rankine-Hugoniot relations, by the different arrangement of up-downgoing wavelength, avoid rayieigh backscatter and the impact of reflection on optical signal transmission quality, guarantee light signal high-quality transmission.
Accompanying drawing explanation
Fig. 1 is the module diagram that optical network access system is converged in metropolitan area provided by the invention wavelength-division.
Fig. 2 is the module diagram of the optical line terminal in Fig. 1.
Fig. 3 is optical add/drop multiplexer in Fig. 1 and the module diagram of far-end light conversion unit.
Main element symbol description
Optical network access system 100 is converged in metropolitan area wavelength-division
Central machine room 110
Optical add/drop multiplexer 140
Far-end light conversion unit 160
Upper united mouth 121
Local side light conversion unit 123
Light is sent out switch 124a
Light is received switch 124b
East orientation upgoing wave division multiplexer 125E
The descending wavelength division multiplexer 125 ' E of east orientation
West is to up wavelength division multiplexer 126W
West is to descending wavelength division multiplexer 126 ' W
East orientation light interleaves filter 128E
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Refer to Fig. 1, it converges optical network access system 100 for a kind of metropolitan area wavelength-division that embodiment of the present invention provides, the wavelength-division of described metropolitan area is converged optical network access system 100 and is comprised a central machine room (Central Office, CO) 110, an optical line terminal (Optical Line Terminal, OLT) 120, a plurality of optical add/drop multiplexers (Optical Add-Drop Multiplexer, OADM) 140 and a plurality of far-end light conversion unit (Optical Transform Unit, OTU) 160, a plurality of far-end OTU160 carry out optical signal transmission between corresponding OADM140 access and OLT120.In present embodiment, metropolitan area wavelength-division is converged optical network access system 100 and is comprised m OADM and n far-end OTU, and m, n are positive integer, m >=1, n >=m.
Take central machine room 110 as networks converge point, in central machine room 110, OLT120 and m OADM node connects and composes ring topology in turn by optical fiber, in ring topology, m OADM node is by being numbered clockwise OADM1, OADM2, OADM m-1, OADM m, with east orientation, west always represents the closure of m OADM node in ring topology, according to clockwise direction, the east orientation of last OADM node with the west of a rear OADM node to being connected, between adjacent two OADM nodes, only has an optical fiber, each OADM node connects at least one far-end OTU, each far-end OTU is linked into the business of its region in ring topology by the OADM node being connected with this far-end OTU, each OADM node carries out the straight-through and up/down row optic path of respective wavelength passage.
Refer to Fig. 2, optical line terminal 120 comprises draws together k upper united mouth 121, aggregation feature module 122, a plurality of local side light conversion unit 123, a plurality of optical switch element (Optical Switcher corresponding with each local side OTU123, OS) 124, a pair of east orientation upgoing wave division multiplexer 125E and the descending wavelength division multiplexer 125 ' E of east orientation, a pair of west to up wavelength division multiplexer 126W with west to descending wavelength division multiplexer 126 ' W, east orientation light interleaves filter 128E and a west interleaves filter 128W to light.In present embodiment, optical line terminal 120 comprises n the local side OTU123 corresponding with far-end OTU160 and n the optical switch element (OS corresponding with local side OTU123
1..., OS
n) 124.K upper united mouth 121 is connected with aggregation feature module 122 respectively, and k upper united mouth 121 is connected with Metro core network, and aggregation feature module 122 completes converging of miscellaneous service.
Each optical switch element 124 comprises that a light sends out switch (OS as shown in Figure 2
nT) 124a and light receives switch (OS as shown in Figure 2
nR) 124b, each light sends out switch 124a and each light receipts switch 124b is 1 * 2 optical switch, each light is sent out switch 124a and is comprised three ports, be respectively light send out port one, light make a start mouthfuls 2 and light make a start mouthfuls 3, each light is sent out switch 124b and is comprised three ports, is respectively light and receives port one, light receiving end mouth 2 and light receiving end mouth 3.
The light that each light is sent out switch 124a is sent out port one and is connected with its corresponding local side OTU123, the light that each light is sent out switch 124a make a start mouthfuls 3 and light make a start and mouthfuls 2 be connected to descending light wavelength division multiplexing 126 ' W with the descending light wavelength division multiplexing 125 ' E of east orientation and west respectively, the light receipts port one that each light is received switch 124b is connected with its corresponding local side OTU123, and light receiving end mouth 3 and light receiving end mouth 2 that each light is received switch 124b are connected to up light wavelength division multiplexing 126W with the up light wavelength division multiplexing 125E of east orientation and west respectively.
Be understandable that, one end of the descending light wavelength division multiplexing 125 ' E of east orientation comprises n port and to send out the port 3 of switch 124a corresponding with n light respectively, west comprises n port, and also to send out the port 2 of switch 124a corresponding with each light respectively to one end of descending light wavelength division multiplexing 126 ' W, one end of the up light wavelength division multiplexing 125E of east orientation comprises n port corresponding with the port 3 of each light receipts switch 124b respectively, and west comprises n port corresponding with the port 2 of n light receipts switch 124b respectively to one end of up light wavelength division multiplexing 126W.
Between the descending wavelength division multiplexer 125 ' E of east orientation upgoing wave division multiplexer 125E and east orientation and west to up wavelength division multiplexer 126W with the western size to the wavelength of up light path transmitting between descending wavelength division multiplexer 126 ' W and the wavelength of descending light path for interleaving arrangement, interleave relation as up be 1/3/5/7/9/ ..., descending is 2/4/6/8/ ...Suppose up employing C wavelength, descending need adopts C+ wavelength, and wherein, C and C+ are the relations interleaving.Or up employing L wavelength, descending employing L+ wavelength; Or can up employing C and L, descending employing C+ and L+; Or the C of Add/drop wavelength and C+, L and L+ are also interchangeable.Be understandable that, up, arranging of downstream band can arrange according to need, as long as guarantee the satisfied Rankine-Hugoniot relations that interleaves of up, downstream wavelength.
East orientation light interleaves filter 128E and west and interleaves between the wavelength that filter 128W is respectively used to make two groups of light paths alternately passing through and meet the relation that interleaves to light, as interleave Rankine-Hugoniot relations by meeting between the radix road of optical add/drop filter and the light wavelength on even number road respectively, in present embodiment, east orientation light interleaves filter 128E and west interleaves between the wavelength that filter 128W makes up/down row light path and meets and interleave Rankine-Hugoniot relations to light.In present embodiment, east orientation light interleaves filter 128E and to light, interleaves filter 128W and be optical interleaver (Interleaver) with west.
East orientation light interleaves one end of filter 128E and the OADM west of eye to being connected, also be that east orientation light interleaves filter 128E and is connected with OADM1, the other end that east orientation light interleaves filter 128E is connected with the other end of the descending wavelength division multiplexer 125 ' E of east orientation with east orientation upgoing wave division multiplexer 125E respectively.West interleaves one end from filter 128W to light is connected with the OADM east orientation of ring tail, also one end that west interleaves filter 128W to light is connected with OADM m, and the other end that west interleaves filter 128W to light is connected with the other end of west to descending wavelength division multiplexer 126 ' W to up wavelength division multiplexer 126W with west respectively.
Under master state, central machine room OLT sends to downlink optical signal transmission clockwise in ring topology of OADM node, after being sent to by the east orientation of last OADM node the west of an OADM node to, that is to say, the light that the light signal that local side OTU123 sends is sent out switch 124a through corresponding light is sent out port one and light and is made a start and mouthfuls 3 transfer to after the descending wavelength division multiplexer 125 ' E of east orientation, then interleaves filter 128E from the west of eye OADM1 node to accessing in ring topology through east orientation light.OADM node sends to uplink optical signal transmission counterclockwise in ring topology of central machine room OLT, the i.e. east orientation to an OADM node after sending to by the west of last OADM node, that is to say, the light signal sending from an OADM interleaves and after filter 128E isolates uplink optical signal, transfers to east orientation upgoing wave division multiplexer 125E through east orientation light, then through corresponding light, receives the light receiving end mouth 3 of switch 124b and light and receive port one and access to corresponding local side OTU123.
Under stand-by state, central machine room OLT sends to downlink optical signal transmission counterclockwise in ring topology of OADM node, the i.e. east orientation to an OADM node after sending to by the west of last OADM node, that is to say, the light that the light signal that local side OTU123 sends is sent out switch 124a through corresponding light is sent out port one and light and is made a start and mouthfuls 2 transfer to west after descending wavelength division multiplexer 126 ' E, then through west, to light, interleaves filter 128W and access in ring topology from the east orientation of ring tail OADM m node.OADM node sends to uplink optical signal transmission clockwise in ring topology of central machine room OLT, after being sent to by the east orientation of last OADM node the west of an OADM node to, that is to say, the light signal sending on an OADM interleaves to light through west after filter 128W isolates uplink optical signal and transfers to west to up wavelength division multiplexer 126W, then accesses to corresponding local side OTU123 through light receiving end mouth 2 and the light receipts port one of corresponding light receipts switch 124b.
When the optical fiber before and after in ring topology between adjacent two OADM breaks down, while breaking down disconnection as the optical fiber between OADM i in ring topology and OADM i+1, i is positive integer, with OADM1, the corresponding light switch element 124 of the far-end OTU that OADM i is connected corresponding local side OTU123 in central machine room is worked under master state, and OADM1, the light that the light signal that the local side OTU123 that far-end OTU that OADM i is connected is corresponding sends is sent out switch 124a through corresponding light is sent out port one and light and is made a start after mouth 3 and transfer to the descending wavelength division multiplexer 125 ' E of east orientation, with OADM1, the light signal sending on the far-end OTU that OADM i is connected interleaves filter 128E through east orientation light and transfers to east orientation upgoing wave division multiplexer 125E, the light of receiving switch 124b through light is again made a start and mouthfuls 3 is sent out port one with light and transfer to corresponding local side OTU123.
With OADM i+1, the corresponding light switch element 124 of the far-end OTU that OADM m is connected corresponding local side OTU123 in central machine room is worked under stand-by state, with OADM i+1, the light that the light signal that the local side OTU123 that far-end OTU that OADM m is connected is corresponding sends is sent out switch 124a through corresponding light send out port one and light make a start transfer to after mouthfuls 2 western to descending wavelength division multiplexer 126 ' W, with OADM i+1, the light signal sending on the far-end OTU that OADM m is connected interleaves filter 128W through west to light and transfers to west to up wavelength division multiplexer 126W, the light of receiving switch 124b through light is again made a start and mouthfuls 2 is sent out port one with light and transfer to corresponding local side OTU123.
Refer to Fig. 3, each the OADM node in ring topology comprises that a wavelength-selective switches (Wavelength SelectiveSwitch, WSS) and 4 OADM optical switches are respectively OS
1, OS
2, OS
3, OS
44 OADM optical switches are 1 * 2 optical switch, include port one, port 2 and port 3, WSS in each OADM node is connected with at least one far-end OTU, the far-end OTU placement that can connected OADM node exists together, also connected OADM places at different place as required, for example, far-end OTU is placed in to mobile base station or big customer place.OS
1port one, OS
2port one be all connected with WSS, OS
1port 2 and OS
3port 2 be connected, OS
2port 2 and OS
3port 3 be connected, OS
1port 3 and OS
4port 3 be connected, OS
2port 3 and OS
4port 2 be connected.
WSS in OADM node completes the up/down loop of local wavelength, and other wavelength is straight-through, under master state, and OS
3port one, 2 be communicated with, OS
1port one, 2 be communicated with, OS
2port one, 3 be communicated with, OS
4port one, 2 be communicated with, signal is from west to entering/go out OS
3, through OS
1enter/go out WSS, straight-through wavelength is through OS
2, OS
4from east orientation, go out/enter.Under stand-by state, OS
4port one, 3 be communicated with, OS
1port one, 3 be communicated with, OS
2port one, 2 be communicated with, OS
3port one, 3 be communicated with, signal enters/goes out OS from east orientation
4, through OS
1enter/go out WSS, straight-through wavelength is through OS
2, OS
3from west to going out/entering.
Optical fiber in ring topology between OADM i and OADM i+1 breaks down while disconnecting, i is positive integer, OADM1 ..., all OADM optical switches in OADM i are all operated under master state, OADM i+1 ..., all OADM optical switches in OADM m are all operated under stand-by state.
The line interface of far-end OTU comprises circuit transmission interface L
tXwith circuit receiving interface L
rX, the circuit transmission interface L of WSS and far-end OTU
tXwith circuit receiving interface L
rXbe connected, far-end OTU comprises customer side transmission interface C
tXwith customer side receiving interface C
rX, also can adopt branch road multiple connection (Tributary Multiplexing, TMUX) technology that many group customer side interfaces are provided, far-end OTU comprises a plurality of customer side transmission interface C
tXwith a plurality of customer side receiving interface C
rX.If business is unidirectional, for example receive only or send, far-end OTU only includes customer side transmission interface C
tXor only include customer side receiving interface C
rX.Far-end OTU can access the business in the region 1,2,3,4 shown in Fig. 1 as FTTx(Fiber-to-the-x, optical fiber access) user, DSLAM(Digital Subscriber Line Access Multiplexer, digital subscriber line access multiplex), big customer's special line, mobile base station etc.
When a pair of local side OTU123, the far-end OTU160 that is operated in Same Wavelength accesses for PON, physical layer in PON (Physical Layer, PHY) layer function (as the reception etc. that happens suddenly) is realized in the customer side interface of far-end OTU, MAC layer in PON (Media Access Control, MAC)/Transmission Convergence (Transmission Convergence, TC) function (as adaptation, Dynamic Bandwidth Allocation, range finding etc.) realizes in local side OTU.
Embodiment of the present invention provides the wavelength-division of a kind of metropolitan area to converge optical-fiber network cut-in method, and it accesses to a plurality of corresponding local side light conversion unit 124 of central machine room 110 optical line terminals 120 for realizing the business of a plurality of far-end light conversion unit 160 ends by a plurality of optical add/drop multiplexers 140.The wavelength-division of described metropolitan area is converged optical-fiber network cut-in method and is comprised the following steps:
S110: under master state in ring topology light signal from described local side light conversion unit through corresponding light add-drop multiplexer, realize up/down row optic path with corresponding far-end light conversion unit clockwise and the size of the wavelength of uplink optical signal that transmits and the wavelength of downlink optical signal for interleaving arrangement;
S120: under stand-by state in ring topology light signal from described local side light conversion unit through corresponding light add-drop multiplexer, realize up/down row optic path with corresponding far-end light conversion unit counterclockwise and the size of the wavelength of uplink optical signal that transmits and the wavelength of downlink optical signal for interleaving arrangement.
Further comprising the steps of in step S110:
S111: transfer to corresponding far-end light conversion unit from described local side light conversion unit clockwise direction through corresponding light add-drop multiplexer at master state downlink optical signal in ring topology;
S112: the size that counterclockwise transfers to corresponding local side light conversion unit and the wavelength of uplink optical signal transmitting and the wavelength of downlink optical signal through corresponding light add-drop multiplexer from described far-end light conversion unit at master state uplink optical signal in ring topology is for interleaving arrangement.
In step S111, central machine room OLT sends to downlink optical signal transmission clockwise in ring topology of OADM node, the light that the light signal that local side OTU123 sends is sent out switch 124a through corresponding light is sent out port one and light and is made a start and mouthfuls 3 transfer to after the descending wavelength division multiplexer 125 ' E of east orientation, then interleaves filter 128E from the west of eye OADM1 node to accessing in ring topology through east orientation light.
In step S112, from OADM node, send to uplink optical signal transmission counterclockwise in ring topology of central machine room OLT, the light signal sending on an OADM interleaves and after filter 128E isolates uplink optical signal, transfers to east orientation upgoing wave division multiplexer 125E through east orientation light, then through corresponding light, receives the light receiving end mouth 3 of switch 124b and light and receive port one and access to corresponding local side OTU123.
Further comprising the steps of in step S120:
S121: counterclockwise transfer to corresponding far-end light conversion unit through corresponding light add-drop multiplexer from described local side light conversion unit at stand-by state downlink optical signal in ring topology;
S122: the size that transfers to corresponding local side light conversion unit and the wavelength of uplink optical signal transmitting and the wavelength of downlink optical signal from described far-end light conversion unit clockwise direction through corresponding light add-drop multiplexer at stand-by state uplink optical signal in ring topology is for interleaving arrangement.
In step S121, central machine room OLT120 sends to downlink optical signal transmission counterclockwise in ring topology of OADM140 node, the light that the light signal that local side OTU123 sends is sent out switch 124a through corresponding light is sent out port one and light and is made a start and mouthfuls 2 transfer to west after descending wavelength division multiplexer 126 ' E, then through west, to light, interleaves filter 128W and access in ring topology from the east orientation of ring tail OADM m node.
In step S122, OADM140 node sends to uplink optical signal transmission clockwise in ring topology of central machine room OLT120, the light signal sending on an OADM interleaves to light through west after filter 128W isolates uplink optical signal and transfers to west to up wavelength division multiplexer 126W, then accesses to corresponding local side OTU123 through light receiving end mouth 2 and the light receipts port one of corresponding light receipts switch 124b.
When before and after in ring topology, adjacent two optical add/drop multiplexers break down as the optical fiber between OADM i and OADM i+1, the wavelength-division of described metropolitan area is converged optical-fiber network cut-in method and is comprised the following steps:
S130: realize up/down row optic path from described local side light conversion unit light signal on the link optical add/drop multiplexer along clockwise direction in ring topology to fault optical fiber under master state;
S140: realize up/down row optic path from described local side light conversion unit light signal on the link optical add/drop multiplexer along counter clockwise direction in ring topology to fault optical fiber under stand-by state.
In step S130, comprise the following steps:
S131: transferring to corresponding far-end light conversion unit from described local side light conversion unit clockwise direction through corresponding light add-drop multiplexer from described local side light conversion unit downlink optical signal on the link optical add/drop multiplexer along clockwise direction in ring topology to fault optical fiber;
S132: counterclockwise transfer to corresponding local side light conversion unit through corresponding light add-drop multiplexer from described far-end light conversion unit from described local side light conversion unit uplink optical signal on the link optical add/drop multiplexer along counter clockwise direction in ring topology to fault optical fiber.
In step S131, with OADM1 ..., the far-end OTU160 that is connected of OADM i corresponding local side OTU123 in central machine room corresponding light switch element 124 under master state, work, with OADM1 ..., the light signal that sends of local side OTU123 that the far-end OTU that is connected of OADM i the is corresponding light of sending out switch 124a through corresponding light sends out port one and light and makes a start after mouth 3 and transfer to the descending wavelength division multiplexer 125 ' E of east orientation.
In step S132, with OADM1 ..., the light signal that send on the far-end OTU160 that is connected of OADM i interleaves filter 128E through east orientation light and transfers to east orientation upgoing wave division multiplexer 125E, then make a start and mouthfuls 3 send out port one with light and transfer to corresponding local side OTU123 through the light that light is received switch 124b.
In step S140, comprise the following steps:
S141: counterclockwise transfer to corresponding far-end light conversion unit through corresponding light add-drop multiplexer from described local side light conversion unit from described local side light conversion unit downlink optical signal on the link optical add/drop multiplexer along counter clockwise direction in ring topology to fault optical fiber;
S142: transfer to corresponding local side light conversion unit from described far-end light conversion unit clockwise direction through corresponding light add-drop multiplexer from described local side light conversion unit uplink optical signal on the link optical add/drop multiplexer along counter clockwise direction in ring topology to fault optical fiber.
In step S141, with OADM i+1 ..., the far-end OTU160 that is connected of OADM m corresponding local side OTU123 in central machine room corresponding light switch element 124 under stand-by state, work, with OADM i+1 ..., the light signal that sends of local side OTU123 that the far-end OTU that is connected of OADM m the is corresponding light of sending out switch 124a through corresponding light send out port one and light make a start transfer to after mouthfuls 2 western to descending wavelength division multiplexer 126 ' W.
In step S142, with OADM i+1 ..., the light signal that send on the far-end OTU160 that is connected of OADM m interleaves filter 128W through west to light and transfers to west to up wavelength division multiplexer 126W, then make a start and mouthfuls 2 send out port one with light and transfer to corresponding local side OTU123 through the light that light is received switch 124b.
Optical network access system and cut-in method are converged in metropolitan area provided by the invention wavelength-division, not only by OTU, break the various/PON technology of constraint for to(for) wavelength planning, / coexisting and as required upgrading for PON technology various to realize, and arrange in optical line terminal 120 on east orientation/row wavelength division multiplexer and west upwards/row wavelength division multiplexer arrange between the up/down traveling optical signal wavelength of transmission and meet and interleave Rankine-Hugoniot relations, by the different arrangement of up-downgoing wavelength, avoid rayieigh backscatter and the impact of reflection on optical signal transmission quality, guarantee light signal high-quality transmission.
Be understandable that, for the person of ordinary skill of the art, can make other various corresponding changes and distortion by technical conceive according to the present invention, and all these change and distortion all should belong to the protection range of the claims in the present invention.
Claims (10)
1. optical network access system is converged in a metropolitan area wavelength-division, it accesses to a plurality of corresponding local side light conversion unit of central machine room optical line terminal for realizing the business of a plurality of far-end light conversion unit ends by a plurality of corresponding light add-drop multiplexers, between described optical line terminal and described each optical add/drop multiplexer node, through simple optical fiber, be connected common looping topology successively, the local side light conversion unit of described optical line terminal a plurality of corresponding light add-drop multiplexers in ring topology are realized up/down row loop with corresponding far-end light conversion unit, it is characterized in that, the wavelength of up light path of loop transmission between described far-end delivery unit and described local side light conversion unit and the size of the wavelength of descending light path are for interleaving arrangement.
2. optical network access system is converged in metropolitan area as claimed in claim 1 wavelength-division, it is characterized in that, described optical line terminal comprises that a pair of east orientation upgoing wave division multiplexer and the descending wavelength division multiplexer of east orientation and a pair of west are to up wavelength division multiplexer and western to descending wavelength division multiplexer, when master state, described each local side light conversion unit carries out respectively the size of the optical wavelength that the transmission of up/down row light path and described east orientation upgoing wave division multiplexer and the descending wavelength division multiplexer of described east orientation transmit respectively for interleaving arrangement in ring topology between corresponding optical add/drop multiplexer and corresponding far-end light conversion unit by described east orientation upgoing wave division multiplexer and the descending wavelength division multiplexer of described east orientation, when stand-by state, described local side light conversion unit carries out respectively the size of the optical wavelength the transmission of up/down row light path and described west transmitted respectively to descending wavelength division multiplexer to up wavelength division multiplexer and described west for interleaving arrangement in ring topology between corresponding optical add/drop multiplexer and corresponding far-end light conversion unit to up wavelength division multiplexer and described west to descending wavelength division multiplexer by described west.
3. optical network access system is converged in metropolitan area as claimed in claim 2 wavelength-division, it is characterized in that, described east orientation upgoing wave division multiplexer, the descending wavelength division multiplexer of described east orientation, described west is corresponding with described local side light conversion unit to one end of descending wavelength division multiplexer to up wavelength division multiplexer and described west, described optical line terminal also comprises that an east orientation light interleaves filter and a west interleaves filter to light, described east orientation light interleaves filter and described west and interleaves between the wavelength that filter is respectively used to realize up-downgoing light path and meet and interleave Rankine-Hugoniot relations to light, described east orientation light interleaves one end of filter and the optical add/drop multiplexer west of eye to being connected, the other end that described east orientation light interleaves filter is connected with the other end of the descending wavelength division multiplexer of described east orientation with described east orientation upgoing wave division multiplexer respectively, described west interleaves filter to light and is connected with the optical add/drop multiplexer east orientation of ring tail, the other end that described west interleaves filter to light is connected with the other end of described west to descending wavelength division multiplexer to up wavelength division multiplexer with described west respectively.
4. optical network access system is converged in metropolitan area as claimed in claim 3 wavelength-division, it is characterized in that, the wavelength-division of described metropolitan area is converged optical network access system and is also comprised the corresponding optical switch element of a plurality of and described each local side light conversion unit, when master state, the light signal that described each local side light conversion unit sends transfers to described east orientation light by corresponding optical switch element through the descending light wavelength division multiplexing of described east orientation and interleaves filter and carry out descending optic path, the light signal sending on described each far-end light conversion unit interleaves filter by described east orientation light and through the up light wavelength division multiplexing of described east orientation and corresponding optical switch element, transfers to corresponding far-end light conversion unit and carry out up optic path, when stand-by state, the light signal that described each local side light conversion unit sends transfers to described west through described west to descending light wavelength division multiplexing by corresponding optical switch element and to light, interleaves filter and carry out descending optic path, the light signal sending on described each far-end light conversion unit interleaves filter by described west to light and through described west, to up light wavelength division multiplexing and corresponding optical switch element, transfers to corresponding far-end light conversion unit and carry out up optic path.
5. optical network access system is converged in metropolitan area as claimed in claim 4 wavelength-division, it is characterized in that, described each optical switch element comprises that a light is sent out switch and light is received switch, described light sends out switch and described light receipts switch all has three ends, one end that described each light is sent out switch is connected with corresponding local side light conversion unit, the another two ends that described each light is sent out switch are connected to descending light wavelength division multiplexing with described west with the descending light wavelength division multiplexing of described east orientation respectively, one end that described each light is received switch is connected with corresponding local side light conversion unit, the another two ends of described each transmit-receive switch are connected to up light wavelength division multiplexing with described west with the up light wavelength division multiplexing of described east orientation respectively.
6. optical network access system is converged in metropolitan area as claimed in claim 5 wavelength-division, it is characterized in that, the direction that described optical add/drop multiplexer node connects in ring topology be divided into east orientation with west to, in the direction of the clock, the east orientation of last optical add/drop multiplexer node with the west of a rear optical add/drop multiplexer node to being connected, described optical line terminal comprises that a pair of east orientation upgoing wave division multiplexer and the descending wavelength division multiplexer of east orientation and a pair of west are to up wavelength division multiplexer and western to descending wavelength division multiplexer, when the optical fiber in ring topology between the adjacent optical add/drop multiplexer in two front and back breaks down, in ring topology clockwise direction from described local side light conversion unit successively in the far-end light conversion unit of the corresponding access of each optical add/drop multiplexer optical add/drop multiplexer fault optical fiber, the light of the light conversion unit of the local side light conversion unit corresponding connection corresponding with the far-end light conversion unit of each access sends out switch and light receipts switch is worked under master state, in the far-end light conversion unit that counterclockwise optical add/drop multiplexer accesses to each optical add/drop multiplexer correspondence described local side light conversion unit successively from fault optical fiber in ring topology, the light of the light conversion unit of the local side light conversion unit corresponding connection corresponding with the far-end light conversion unit of each access sends out switch and light receipts switch is worked under stand-by state.
7. optical-fiber network cut-in method is converged in a metropolitan area wavelength-division, it accesses to a plurality of corresponding local side light conversion unit of central machine room optical line terminal for realizing the business of a plurality of far-end light conversion unit ends by a plurality of optical add/drop multiplexers, between described optical line terminal and described each optical add/drop multiplexer node, through simple optical fiber, be connected common looping topology successively, the local side light conversion unit of described optical line terminal a plurality of corresponding light add-drop multiplexers in ring topology are realized up/down row loop with corresponding far-end light conversion unit, the direction that described optical add/drop multiplexer node connects in ring topology be divided into east orientation with west to, in the direction of the clock, the east orientation of last optical add/drop multiplexer node with the west of a rear optical add/drop multiplexer node to being connected, the wavelength-division of described metropolitan area is converged optical-fiber network cut-in method and is comprised the following steps:
Under master state in ring topology light signal from described local side light conversion unit suitable/counterclockwise through corresponding light add-drop multiplexer, realize up/down row optic path with corresponding far-end light conversion unit and the size of the wavelength of uplink optical signal that transmits and the wavelength of downlink optical signal for interleaving arrangement;
Under stand-by state in ring topology light signal from described local side light conversion unit contrary/clockwise through corresponding light add-drop multiplexer, realize up/down row optic path with corresponding far-end light conversion unit and the size of the wavelength of uplink optical signal that transmits and the wavelength of downlink optical signal for interleaving arrangement.
8. optical-fiber network cut-in method is converged in metropolitan area as claimed in claim 7 wavelength-division, it is characterized in that, the wavelength-division of described metropolitan area is converged in optical-fiber network cut-in method further comprising the steps of:
At master state downlink optical signal, in ring topology, from described local side light conversion unit clockwise direction, through corresponding light add-drop multiplexer, transfer to corresponding far-end light conversion unit;
The size that counterclockwise transfers to corresponding local side light conversion unit and the wavelength of uplink optical signal transmitting and the wavelength of downlink optical signal through corresponding light add-drop multiplexer from described far-end light conversion unit at master state uplink optical signal in ring topology is for interleaving arrangement;
At stand-by state downlink optical signal, in ring topology, from described local side light conversion unit, counterclockwise through corresponding light add-drop multiplexer, transfer to corresponding far-end light conversion unit;
The size that transfers to corresponding local side light conversion unit and the wavelength of uplink optical signal transmitting and the wavelength of downlink optical signal from described far-end light conversion unit clockwise direction through corresponding light add-drop multiplexer at stand-by state uplink optical signal in ring topology is for interleaving arrangement.
9. optical-fiber network cut-in method is converged in metropolitan area as claimed in claim 8 wavelength-division, it is characterized in that, when the optical fiber before and after in ring topology between adjacent two optical add/drop multiplexers breaks down, the wavelength-division of described metropolitan area is converged in optical-fiber network cut-in method and is comprised the following steps:
From described local side light conversion unit light signal on the link optical add/drop multiplexer along clockwise direction in ring topology to fault optical fiber, under master state, realize up/down row optic path;
From described local side light conversion unit light signal on the link optical add/drop multiplexer along counter clockwise direction in ring topology to fault optical fiber, under stand-by state, realize up/down row optic path.
10. optical-fiber network cut-in method is converged in metropolitan area as claimed in claim 9 wavelength-division, it is characterized in that,
From described local side light conversion unit downlink optical signal on the link optical add/drop multiplexer along clockwise direction in ring topology to fault optical fiber, from described local side light conversion unit clockwise direction, through corresponding light add-drop multiplexer, transfer to corresponding far-end light conversion unit;
From described local side light conversion unit uplink optical signal on the link optical add/drop multiplexer along counter clockwise direction in ring topology to fault optical fiber, from described far-end light conversion unit, counterclockwise through corresponding light add-drop multiplexer, transfer to corresponding local side light conversion unit;
From described local side light conversion unit downlink optical signal on the link optical add/drop multiplexer along counter clockwise direction in ring topology to fault optical fiber, from described local side light conversion unit, counterclockwise through corresponding light add-drop multiplexer, transfer to corresponding far-end light conversion unit;
From described local side light conversion unit uplink optical signal on the link optical add/drop multiplexer along counter clockwise direction in ring topology to fault optical fiber, from described far-end light conversion unit clockwise direction, through corresponding light add-drop multiplexer, transfer to corresponding local side light conversion unit.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104022927A (en) * | 2014-05-19 | 2014-09-03 | 武汉邮电科学研究院 | Fixed mobile convergence wavelength division access ring and access method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615969A (en) * | 2009-08-12 | 2009-12-30 | 烽火通信科技股份有限公司 | A kind of de-multiplexing system of wavelength division multiplexing network |
| CN102665152A (en) * | 2012-05-11 | 2012-09-12 | 武汉邮电科学研究院 | Novel wide-area coverage hybrid wavelength-time division multiplexing passive optical network system |
| WO2013029385A1 (en) * | 2011-09-02 | 2013-03-07 | 中兴通讯股份有限公司 | Data interaction system and method thereof |
| CN103281152A (en) * | 2013-05-29 | 2013-09-04 | 武汉邮电科学研究院 | Convergence type metropolitan area wavelength division access network system and accessing method |
-
2014
- 2014-01-08 CN CN201410007561.4A patent/CN103746747B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615969A (en) * | 2009-08-12 | 2009-12-30 | 烽火通信科技股份有限公司 | A kind of de-multiplexing system of wavelength division multiplexing network |
| WO2013029385A1 (en) * | 2011-09-02 | 2013-03-07 | 中兴通讯股份有限公司 | Data interaction system and method thereof |
| CN102665152A (en) * | 2012-05-11 | 2012-09-12 | 武汉邮电科学研究院 | Novel wide-area coverage hybrid wavelength-time division multiplexing passive optical network system |
| CN103281152A (en) * | 2013-05-29 | 2013-09-04 | 武汉邮电科学研究院 | Convergence type metropolitan area wavelength division access network system and accessing method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104022927A (en) * | 2014-05-19 | 2014-09-03 | 武汉邮电科学研究院 | Fixed mobile convergence wavelength division access ring and access method |
| CN104022927B (en) * | 2014-05-19 | 2017-10-10 | 武汉邮电科学研究院 | Gu move fusion wavelength-division access ring and cut-in method |
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|---|---|
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