CN103746747B - 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, more particularly, to a kind of metro area Wavelength Division convergence optical network access system and method.
Background technology
At present, mobile communication is brought up to by the 100000000 of the 2g/3g epoch stepping into 4g epoch, the bandwidth demand of base station
Gb/s (g bits per second) 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.Additionally, big customer
The bandwidth requirement of special line, wifi (wireless fidelity, Wireless Fidelity) focus etc. is also improving, high bandwidth
Demand makes wdm (wavelength division multiplexing, wavelength-division multiplex) technology become the selection of metropolitan area access
Direction.Operator is desirable to change fixed broadband access and the traditional mode of maintenance separately built by convergence net, mobile retransmission net, real
Existing " an optical fiber Full-Services access ", builds peacekeeping planning, management, effective reduces cost to simplify network.
However, the high-quality that the pon technology that fixed broadband accesses is difficult to meet mobile retransmission, big customer's special line etc. requires,
And the expensive technique such as mstp, ptn/ipran then can not possibly be suitable for the low cost requirement of fixed broadband access, lifted in bandwidth and drive
Under, the metropolitan area that wavelength-division multiplex (wdm, wavelength division multiplexing) is increasingly becoming industry accreditation accesses skill
Art, accesses uplink/downlink light path letter in the ring topology communication link being formed in the simple optical fiber realized using wavelength-division multiplex technique
Rayieigh backscatter and reflex easily occur between number, affects optical signal transmission quality.
Content of the invention
In view of this, the present invention provides a kind of metro area Wavelength Division converged light network insertion system that can improve optical signal transmission quality
System and method.
A kind of metro area Wavelength Division converges optical network access system, and it is used for realizing the business at multiple far-end light conversion unit ends and leads to
Cross the multiple corresponding local side light conversion unit that multiple corresponding light add-drop multiplexers access to optical line terminal in central machine room,
It is connected through simple optical fiber successively between described optical line terminal and described each optical add/drop multiplexer node and collectively form ring topology,
The local side light conversion unit of described optical line terminal is through corresponding optical add/drop multiplexers multiple in ring topology and corresponding far-end light
Conversion unit realizes uplink/downlink loop, and described optical line terminal includes the up wavelength division multiplexer of a pair of east orientation and east orientation down going wave
Division multiplexer, a pair of west interleave wave filter and one with west to down going wave division multiplexer, an east orientation light to upgoing wave division multiplexer
Individual west interleaves wave filter to light, and the up wavelength division multiplexer of described east orientation, the descending wavelength division multiplexer of described east orientation, described west are to up
Wavelength division multiplexer and described west are corresponding with described local side light conversion unit to one end of down going wave division multiplexer, described east orientation light
Interleave one end of wave filter with the optical add/drop multiplexer west of eye to being connected, described east orientation light interleaves the other end of wave filter respectively
Wavelength division multiplexer up with described east orientation is connected with the other end of the descending wavelength division multiplexer of described east orientation, and described west interleaves filter to light
Ripple device is connected with the optical add/drop multiplexer east orientation of ring tail, and the described western other end interleaving wave filter to light is respectively with described west upwards
Traveling wave division multiplexer is connected to the other end of down going wave division multiplexer with described west, and described east orientation light interleaves wave filter and described west
Interleave wave filter to light and be respectively used to realize meet between the wavelength of uplink/downlink light path and interleave Rankine-Hugoniot relations, in master state,
Each local side light conversion unit described passes through the up wavelength division multiplexer of described east orientation and the descending wavelength division multiplexer of described east orientation respectively
Through carrying out the transmission of uplink/downlink light path between optical add/drop multiplexer corresponding in ring topology and corresponding far-end light conversion unit
And the size of the up wavelength division multiplexer optical wavelength that descending wavelength division multiplexer transmits respectively with described east orientation of described east orientation is to interleave
Arrangement, in stand-by state, described local side light conversion unit respectively pass through described west to upgoing wave division multiplexer and described west to
Descending wavelength division multiplexer through carry out between optical add/drop multiplexer corresponding in ring topology and corresponding far-end light conversion unit upper/
The transmission of descending light path and the described western light wave transmitting respectively to down going wave division multiplexer to upgoing wave division multiplexer and described west
Long size is to interleave arrangement.
A kind of metro area Wavelength Division converged light method for network access, it is used for realizing the business at multiple far-end light conversion unit ends and leads to
Cross the multiple corresponding local side light conversion unit that multiple optical add/drop multiplexers access to optical line terminal in central machine room, described
It is connected through simple optical fiber successively between optical line terminal and described each optical add/drop multiplexer node and collectively form ring topology, described
The local side light conversion unit of optical line terminal is converted with corresponding far-end light through corresponding optical add/drop multiplexers multiple in ring topology
Unit realizes uplink/downlink loop, 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 previous optical add/drop multiplexer node with the west of a rear optical add/drop multiplexer node to being connected, described
Metro area Wavelength Division converged light method for network access comprises the following steps:
Corresponding from described local side light conversion unit clockwise direction warp in ring topology in master state downlink optical signal
Optical add/drop multiplexer transmits to corresponding far-end light conversion unit；
Corresponding from described far-end light conversion unit counter clockwise direction warp in ring topology in master state uplink optical signal
Optical add/drop multiplexer transmits to corresponding local side light conversion unit and the wavelength of the uplink optical signal being transmitted and downlink optical signal
Wavelength size be interleave arrangement；
Traveling optical signal is corresponding from described local side light conversion unit counter clockwise direction warp in ring topology in the stand-by state
Optical add/drop multiplexer transmits to corresponding far-end light conversion unit；
Corresponding from described far-end light conversion unit clockwise direction warp in ring topology in stand-by state uplink optical signal
Optical add/drop multiplexer transmits to corresponding local side light conversion unit and the wavelength of the uplink optical signal being transmitted and downlink optical signal
Wavelength size be interleave arrangement.
Compared with prior art, the metro area Wavelength Division that the present invention provides converge optical network access system and method not only by
Otu breaks various/constraint of planning for pon technology for wavelength, to realize various/coexisting and upgrade on demand for pon technology,
And arrange in optical line terminal between the uplink/downlink wavelength of optical signal of transmission meet interleave Rankine-Hugoniot relations, by upper and lower traveling wave
Long different arrangement avoids the impact to optical signal transmission quality of rayieigh backscatter and reflection it is ensured that optical signal high-quality passes
Defeated.
Brief description
Fig. 1 is the module diagram that the metro area Wavelength Division that the present invention provides converges optical network access system.
Fig. 2 is the module diagram of the optical line terminal in Fig. 1.
Fig. 3 is the module diagram of the optical add/drop multiplexer in Fig. 1 and far-end light conversion unit.
Main element symbol description
Metro area Wavelength Division converges optical network access system 100
Central machine room 110
Optical line terminal 120
Optical add/drop multiplexer 140
Far-end light conversion unit 160
Upper united mouth 121
Aggregation feature module 122
Local side light conversion unit 123
Optical switch element 124
Light sends out switch 124a
Light receives switch 124b
East orientation up wavelength division multiplexer 125e
The descending wavelength division multiplexer of east orientation 125 ' e
West is to upgoing wave division multiplexer 126w
West is to down going wave division multiplexer 126 ' w
East orientation light interleaves wave filter 128e
West interleaves wave filter 128w to light
Following specific embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Specific embodiment
Refer to Fig. 1, it converges optical network access system 100 for a kind of metro area Wavelength Division that embodiment of the present invention provides,
Described metro area Wavelength Division converges optical network access system 100 and includes a central machine room (central office, co) 110,
Optical line terminal (optical line terminal, olt) 120, multiple optical add/drop multiplexer (optical add-drop
Multiplexer, oadm) 140 and multiple far-end light conversion unit (optical transform unit, otu) 160, multiple
Far-end otu160 accesses through corresponding oadm140 and carries out optical signal transmission and olt120 between.In present embodiment, metropolitan area ripple
Convergence optical network access system 100 is divided to include m oadm and n far-end otu, m, n are positive integer, m >=1, n >=m.
With central machine room 110 for network convergent point, in central machine room 110, olt120 and m oadm node are suitable by optical fiber
Secondary connect and compose ring topology, in ring topology m oadm node by number clockwise be oadm 1, oadm 2 ...,
Oadm m-1, oadm m, always represent closure in ring topology for the m oadm node with east orientation, west, according to clockwise
Direction, the west of the east orientation of previous oadm node and a rear oadm node to being connected, only one between two neighboring oadm node
Optical fiber, each oadm node connects at least one far-end otu, and each far-end otu is by the business of its region by remote with this
The oadm node that end otu is connected is linked in ring topology, and each oadm node carries out the straight-through of respective wavelength passage and up/down
Row optic path.
Refer to Fig. 2, optical line terminal 120 includes including k upper united mouth 121, aggregation feature module 122, Duo Geju
End light conversion unit 123, the optical switch element (optical switcher, os) 124 that multiple and each local side otu123 is corresponding,
The up wavelength division multiplexer 125e of a pair of east orientation is with the descending wavelength division multiplexer of east orientation 125 ' e, a pair of west to upgoing wave division multiplexer
To down going wave division multiplexer 126 ' w, east orientation light interleaves wave filter 128e and a west interleaves wave filter to light for 126w and west
128w.In present embodiment, optical line terminal 120 includes n local side otu123 and n corresponding with far-end otu160 and office
Corresponding optical switch element (the os of end otu1231、…、osn)124.K upper united mouth 121 respectively with aggregation feature module 122 phase
Even, k upper united mouth 121 is connected with Metro core network, and aggregation feature module 122 completes the convergence of miscellaneous service.
Each optical switch element 124 includes a light and sends out switch (os as shown in Figure 2nt) 124a and light receives switch (as Fig. 2 institute
Show osnr) 124b, each light sends out switch 124a and each light is received switch 124b and is 1 × 2 photoswitch, and each light sends out switch 124a
Including three ports, respectively make a start mouth 1, light of light makes a start mouth 2 and light is made a start mouth 3, and each light is sent out switch 124b and included three ends
Mouthful, respectively light receiving end mouth 1, light receiving end mouth 2 and light receiving end mouth 3.
The light mouth 1 local side otu123 corresponding with it that make a start that each light sends out switch 124a is connected, and each light sends out switch
The light of 124a makes a start mouth 3 and light is made a start mouth 2 respectively with east orientation descending light wavelength division multiplexing 125 ' e and west to descending OWDM
Device 126 ' w is connected, and the local side otu 123 that the light receiving end mouth 1 of each light receipts switch 124b is corresponding with it is connected, and each light is received and opened
Close the light receiving end mouth 3 of 124b and light receiving end mouth 2 is divided again to up light wave with east orientation up light wavelength division multiplexing 125e and west respectively
It is connected with device 126w.
It is understood that one end of the descending light wavelength division multiplexing of east orientation 125 ' e include n port and respectively with n light
Send out switch 124a port 3 corresponding, west to one end of descending light wavelength division multiplexing 126 ' w include n port and respectively with respectively
The port 2 that light sends out switch 124a is corresponding, one end of east orientation up light wavelength division multiplexing 125e include n port and respectively with respectively
Light receive switch 124b port 3 corresponding, west to one end of up light wavelength division multiplexing 126w include n port and respectively with n
The port 2 that individual light receives switch 124b is corresponding.
Between east orientation up wavelength division multiplexer 125e and the descending wavelength division multiplexer of east orientation 125 ' e and west is divided multiple to upgoing wave
The wavelength of the up light path transmitted between down going wave division multiplexer 126 ' w with device 126w and west is big with the wavelength of descending light path
Little in order to interleave arrangement, the relation that interleaves is for example up to be 1/3/5/7/9/ ..., then descending is 2/4/6/8/ ....Assume up employing c ripple
Long, then descending need to adopt c+ wavelength, wherein, c and c+ is the relation interleaving.Or up employing l wavelength, descending employing l+ ripple
Long；Or can up employing c and l, descending employing c+ and l+；Or, c and c+ of Add/drop wavelength, l and l+ are also interchangeable.Permissible
It is understood by, up, downstream band setting can be arranged according to need, as long as ensureing that up, downstream wavelength meets to interleave arrangement
Relation.
East orientation light interleave wave filter 128e with west to light interleave wave filter 128w be respectively used to make alternately through two groups of light
Meet between the wavelength on road and interleave relation, such as pass through respectively between radix road and the wavelength of light on even number road of optical add/drop filter
Meet interleave Rankine-Hugoniot relations, in present embodiment, east orientation light interleave wave filter 128e with west to light interleave wave filter 128w make/
Meet between the wavelength of descending light path and interleave Rankine-Hugoniot relations.In present embodiment, east orientation light interleaves wave filter 128e with west to light
Interleave wave filter 128w and be optical interleaver (interleaver).
East orientation light interleaves the oadm west of one end of wave filter 128e and eye to being connected, namely east orientation light interleaves wave filter
128e is connected with oadm 1, east orientation light interleave the other end of wave filter 128e respectively with east orientation up wavelength division multiplexer 125e and east
It is connected to the other end of down going wave division multiplexer 125 ' e.West interleaves one end of wave filter 128w and the oadm east orientation of ring tail to light
Connect, namely one end that west interleaves wave filter 128w to light is connected with oadm m, west interleaves the other end of wave filter 128w to light
It is connected to the other end of down going wave division multiplexer 126 ' w with west to upgoing wave division multiplexer 126w with west respectively.
Under master state, the downlink optical signal that central machine room olt is sent to oadm node is clockwise in ring topology
Transmission, after being sent to from the east orientation of previous oadm node, the west of an oadm node is to that is to say, that a local side otu123 sends out
The optical signal sending transmits wavelength division multiplexer descending to east orientation through the light that corresponding light sends out switch 124a mouth 1 and light mouth 3 of making a start of making a start
After 125 ' e, then interleave wave filter 128e in the west of eye oadm 1 node is to access ring topology through east orientation light.Oadm node
Be sent to the uplink optical signal of central machine room olt counterclockwise transmission in ring topology, that is, from previous oadm node west to sending out
After delivering to, the east orientation of an oadm node is that is to say, that the optical signal sending from an oadm interleaves wave filter 128e through east orientation light
Transmit after isolating uplink optical signal to east orientation up wavelength division multiplexer 125e, then receive the light receiving end mouth of switch 124b through corresponding light
3 and light receiving end mouth 1 access to corresponding local side otu123.
In the stand-by state, central machine room olt is sent to the downlink optical signal of oadm node in ring topology counterclockwise
Transmission, that is, from previous oadm node east orientation from west to an oadm node after being sent to that is to say, that a local side otu123 sends out
The optical signal sending transmits to west to down going wave division multiplexer through the light that corresponding light sends out switch 124a mouth 1 and light mouth 2 of making a start of making a start
After 126 ' e, then interleave wave filter 128w through west in the east orientation access ring topology of ring tail oadm m node to light.Oadm node
It is sent to the uplink optical signal of central machine room olt clockwise transmission in ring topology, sent out by the east orientation of previous oadm node
The west of an oadm node is to that is to say, that the optical signal that send on an oadm interleaves wave filter 128w through west to light and divides after delivering to
Transmit after separating out uplink optical signal to west to upgoing wave division multiplexer 126w, then the light receiving end mouth 2 receiving switch 124b through corresponding light
And light receiving end mouth 1 accesses to corresponding local side otu123.
When optical fiber between two neighboring oadm breaks down before and after in ring topology, such as in ring topology oadm i and
Optical fiber between oadm i+1 break down disconnection when, i is positive integer, with oadm 1 ..., the far-end otu that is connected of oadm i
In central machine room, the corresponding optical switch element 124 of corresponding local side otu123 works under master state, that is, with oadm
1st ... the optical signal that the far-end otu corresponding local side otu123 that, oadm i is connected sends sends out the light of switch 124a through corresponding light
Make a start mouth 1 and light is made a start and is transmitted after mouth 3 to the descending wavelength division multiplexer of east orientation 125 ' e, with oadm 1 ..., oadm i is connected
The optical signal sending on far-end otu interleaves wave filter 128e through east orientation light and transmits to east orientation up wavelength division multiplexer 125e, then through light
The light mouth 3 and light mouth 1 of making a start of making a start receiving switch 124b transmits to corresponding local side otu123.
To oadm i+1 ..., the far-end otu that is connected of oadm m in central machine room corresponding local side otu123 corresponding
Optical switch element 124 works in the stand-by state, that is, with oadm i+1 ..., the corresponding local side of far-end otu that is connected of oadm m
Make a start through the light that corresponding light sends out switch 124a mouth 1 and light of the optical signal that otu123 sends is made a start and is transmitted to west to down going wave after mouth 2
Division multiplexer 126 ' w, with oadm i+1 ..., the optical signal that send on the far-end otu that is connected of oadm m interleave filtering through west to light
Device 128w transmits to west to upgoing wave division multiplexer 126w, then transmits through the light that light receives switch 124b mouth 2 and light mouth 1 of making a start of making a start
To corresponding local side otu123.
Refer to Fig. 3, each the oadm node in ring topology includes a wavelength-selective switches (wavelength
Selectiveswitch, wss) and 4 oadm photoswitches be respectively os1、os2、os3、os4, 4 oadm photoswitches are 1 × 2
Photoswitch, all includes port 1, port 2 and port 3, and the wss in each oadm node is connected with least one far-end otu, far-end
Otu can exist together placement it is also possible to connected oadm different place placement as needed with connected oadm node, for example will
Far-end otu is placed at mobile base station or big customer.os1Port 1, os2Port 1 be all connected with wss, os1Port 2 and os3
Port 2 be connected, os2Port 2 and os3Port 3 be connected, os1Port 3 and os4Port 3 be connected, os2Port 3 with
os4Port 2 be connected.
Wss in oadm node completes the up/down loop of local wavelength, and other wavelength is straight-through, in master state
Under, os3Port 1,2 connection, os1Port 1,2 connection, os2Port 1,3 connection, os4Port 1,2 connection, signal from
West is to entry/exit os3, through os1Entry/exit wss, straight-through wavelength is through os2、os4Go out/enter from east orientation.In the stand-by state, os4End
Mouth 1,3 connection, os1Port 1,3 connection, os2Port 1,2 connection, os3Port 1,3 connection, signal is from east orientation entry/exit
os4, through os1Entry/exit wss, straight-through wavelength is through os2、os3From west to going out/enter.
When in ring topology the optical fiber between oadm i and oadm i+1 break down disconnection when, i be positive integer, oadm
1st ..., all oadm photoswitches in oadm i are all operated under master state, oadm i+1 ..., all in oadm m
Oadm photoswitch all works in the stand-by state.
The line interface of far-end otu includes circuit transmission interface ltxWith line receiver interface lrx, the line of wss and far-end otu
Road transmission interface ltxWith line receiver interface lrxIt is connected, far-end otu includes customer side transmission interface ctxWith customer side receiving interface
crx, it would however also be possible to employ branch road multiple connection (tributary multiplexing, tmux) technology provides multigroup client side interface, that is, far
End otu includes multiple customer side transmission interface ctxWith multiple customer side receiving interface crx.If business is unidirectional, for example only
Receive or send, then far-end otu only includes customer side transmission interface ctxOr only include customer side receiving interface crx.Far-end otu can
To access business such as fttx (fiber-to-the-x, intelligent acess) user, the dslam in the region 1,2,3,4 shown in Fig. 1
(digital subscriber line access multiplexer, digital subscriber line access multiplex), big customer are special
Line, mobile base station etc..
When local side otu123, the far-end otu160 being operated in Same Wavelength a pair is used for pon and accesses, the physics in pon
Layer (physical layer, phy) layer function (as burst reception etc.) is realized, in pon in the client side interface of far-end otu
MAC layer (media access control, mac)/Transmission Convergence (transmission convergence,
Tc) function (as adaptation, Dynamic Bandwidth Allocation, range finding etc.) is realized in local side otu.
Embodiment of the present invention provides a kind of metro area Wavelength Division converged light method for network access, and it is used for realizing multiple far-ends
The business at light conversion unit 160 end accesses to optical line terminal 120 in central machine room 110 by multiple optical add/drop multiplexers 140
Multiple corresponding local side light conversion unit 124.Described metro area Wavelength Division converged light method for network access comprises the following steps:
S110: in ring topology under master state, optical signal divides through corresponding light clockwise from described local side light conversion unit
Insert multiplexer and corresponding far-end light conversion unit realize uplink/downlink optic path and the wavelength of the uplink optical signal being transmitted with
The size of the wavelength of downlink optical signal is to interleave arrangement；
S120: in ring topology, optical signal divides through corresponding light counterclockwise from described local side light conversion unit in the stand-by state
Insert multiplexer and corresponding far-end light conversion unit realize uplink/downlink optic path and the wavelength of the uplink optical signal being transmitted with
The size of the wavelength of downlink optical signal is to interleave arrangement.
Further comprising the steps of in step s110:
S111: master state downlink optical signal in ring topology from described local side light conversion unit clockwise direction warp
Corresponding optical add/drop multiplexer transmits to corresponding far-end light conversion unit；
S112: master state uplink optical signal in ring topology from described far-end light conversion unit counter clockwise direction warp
Corresponding optical add/drop multiplexer transmits to corresponding local side light conversion unit and the wavelength of the uplink optical signal being transmitted and descending light
The size of the wavelength of signal is to interleave arrangement.
In step s111, the downlink optical signal that central machine room olt is sent to oadm node is clockwise in ring topology
Transmission, the optical signal that is, local side otu123 sends transmits through the light that corresponding light sends out switch 124a mouth 1 and light mouth 3 of making a start of making a start
To the descending wavelength division multiplexer of east orientation 125 ' e, then interleave wave filter 128e from the west of eye oadm 1 node to connecing through east orientation light
Enter in ring topology.
In step s112, it is sent to the uplink optical signal of the central machine room olt inverse time in ring topology from oadm node
Pin transmits, and the optical signal sending on an oadm interleaves wave filter 128e through east orientation light to be isolated and transmit to east after uplink optical signal
To upgoing wave division multiplexer 125e, then the light receiving end mouth 3 through corresponding light receipts switch 124b and light receiving end mouth 1 access to corresponding office
End otu123.
Further comprising the steps of in step s120:
S121: in the stand-by state traveling optical signal in ring topology from described local side light conversion unit counter clockwise direction warp
Corresponding optical add/drop multiplexer transmits to corresponding far-end light conversion unit；
S122: stand-by state uplink optical signal in ring topology from described far-end light conversion unit clockwise direction warp
Corresponding optical add/drop multiplexer transmits to corresponding local side light conversion unit and the wavelength of the uplink optical signal being transmitted and descending light
The size of the wavelength of signal is to interleave arrangement.
In step s121, central machine room olt120 is sent to the downlink optical signal of oadm140 node in ring topology
Counterclockwise transmission, the optical signal that is, local side otu123 sends is made a start with light through the light that corresponding light sends out switch 124a mouth 1 of making a start
After mouth 2 transmits to west to down going wave division multiplexer 126 ' e, then interleave wave filter 128w from ring tail oadm m node through west to light
East orientation accesses in ring topology.
In step s122, oadm140 node is sent to the uplink optical signal of central machine room olt120 in ring topology
Clockwise transmission, the optical signal sending on an oadm interleaves wave filter 128w through west to light and isolates transmission after uplink optical signal
To west to upgoing wave division multiplexer 126w, then the light receiving end mouth 2 through corresponding light receipts switch 124b and light receiving end mouth 1 access to correspondence
Local side otu123.
Before and after in ring topology, event in the optical fiber between two neighboring optical add/drop multiplexer such as oadm i and oadmi+1
During barrier, described metro area Wavelength Division converged light method for network access comprises the following steps:
S130: divide slotting from described local side light conversion unit in the front light of the clockwise direction along along ring topology to fault optical fiber
The optical signal on link between multiplexer realizes uplink/downlink optic path under master state；
S140: divide slotting from described local side light conversion unit in the rear light of the counter clockwise direction along along ring topology to fault optical fiber
The optical signal on link between multiplexer realizes uplink/downlink optic path in the stand-by state.
Step s130 comprises the following steps:
S131: dividing in the front light of clockwise direction to the fault optical fiber along along ring topology from described local side light conversion unit
The downlink optical signal on link between insert multiplexer divides through corresponding light from described local side light conversion unit clockwise direction to be inserted again
Transmitted to corresponding far-end light conversion unit with device；
S132: divide slotting from described local side light conversion unit in the front light of the counter clockwise direction along along ring topology to fault optical fiber
The uplink optical signal on link between multiplexer is from described far-end light conversion unit counter clockwise direction through corresponding OADM
Device transmits to corresponding local side light conversion unit.
In step s131, with oadm 1 ..., the far-end otu160 that is connected of oadm i corresponding office in central machine room
The corresponding optical switch element 124 of end otu123 works under master state, with oadm 1 ..., the far-end otu that is connected of oadm i
The optical signal that corresponding local side otu123 sends make a start through the light that corresponding light sends out switch 124a mouth 1 and light make a start transmit after mouth 3 to
The descending wavelength division multiplexer of east orientation 125 ' e.
In step s132, with oadm 1 ..., the optical signal that send on the far-end otu160 that is connected of oadm i is through east orientation light
Interleave wave filter 128e to transmit to east orientation up wavelength division multiplexer 125e, then send out with light through the light mouth 3 of making a start that light receives switch 124b
Port 1 is transmitted to corresponding local side otu123.
Step s140 comprises the following steps:
S141: divide slotting from described local side light conversion unit in the rear light of the counter clockwise direction along along ring topology to fault optical fiber
The downlink optical signal on link between multiplexer is from described local side light conversion unit counter clockwise direction through corresponding OADM
Device transmits to corresponding far-end light conversion unit；
S142: divide slotting from described local side light conversion unit in the rear light of the counter clockwise direction along along ring topology to fault optical fiber
The uplink optical signal on link between multiplexer is from described far-end light conversion unit clockwise direction through corresponding OADM
Device transmits to corresponding local side light conversion unit.
In step s141, with oadm i+1 ..., the far-end otu160 that is connected of oadm m corresponding in central machine room
The corresponding optical switch element 124 of local side otu123 works in the stand-by state, that is, with oadm i+1 ..., oadm m is connected
Make a start through the light that corresponding light sends out switch 124a mouth 1 and light of the optical signal that far-end otu corresponding local side otu123 sends is made a start after mouth 2
Transmit to west to down going wave division multiplexer 126 ' w.
In step s142, with oadm i+1 ..., the optical signal that send on the far-end otu160 that is connected of oadm m through west to
Light interleaves wave filter 128w and transmits to west to upgoing wave division multiplexer 126w, then makes a start mouth 2 and light through the light that light receives switch 124b
Mouth 1 of making a start transmits to corresponding local side otu123.
The metro area Wavelength Division that the present invention provides converges optical network access system and cut-in method, not only by otu break various/
The constraint planned for wavelength for pon technology, to realize various/coexisting and upgrade on demand for pon technology, and in optical link eventually
On setting east orientation in end 120/traveling wave division multiplexer and west upwards/the traveling wave division multiplexer uplink/downlink optical signal of transmission is set
Meet between wavelength and interleave Rankine-Hugoniot relations, avoid rayieigh backscatter and reflection that light is believed by the different arrangement of up-downgoing wavelength
The impact of number transmission quality is it is ensured that optical signal high-quality transmission.
It is understood that for the person of ordinary skill of the art, can be done with technology according to the present invention design
Go out other various corresponding change and deformation, and all these change all should belong to the protection model of the claims in the present invention with deformation
Enclose.
Claims (7)
1. a kind of metro area Wavelength Division converges optical network access system, and it is used for realizing the business at multiple far-end light conversion unit ends and passes through
Multiple corresponding optical add/drop multiplexers access to the multiple corresponding local side light conversion unit of optical line terminal in central machine room, institute
State to be connected through simple optical fiber successively between optical line terminal and described each optical add/drop multiplexer node and collectively form ring topology, institute
The local side light conversion unit stating optical line terminal is turned with corresponding far-end light through corresponding optical add/drop multiplexers multiple in ring topology
Change unit and realize uplink/downlink loop it is characterised in that described optical line terminal includes the up wavelength division multiplexer of east orientation and one
The descending wavelength division multiplexer of individual east orientation, a west are to upgoing wave division multiplexer and a west to down going wave division multiplexer, an east orientation
Light interleaves wave filter and a west interleaves wave filter to light, and the up wavelength division multiplexer of described east orientation, the descending wavelength-division of described east orientation are multiple
With device, described west to upgoing wave division multiplexer and described west to one end of down going wave division multiplexer and described local side light conversion unit
Corresponding, described east orientation light interleaves one end of wave filter and the optical add/drop multiplexer west of eye to being connected, and described east orientation light interleaves
The other end of wave filter respectively with described east orientation up wavelength division multiplexer and the descending wavelength division multiplexer of described east orientation other end phase
Even, described west is interleave wave filter to light and is connected with the optical add/drop multiplexer east orientation of ring tail, and described west interleaves the another of wave filter to light
One end is connected to the other end of down going wave division multiplexer with described west to upgoing wave division multiplexer with described west respectively, described east orientation
Light interleave wave filter and described west to light interleave wave filter be respectively used to make between the wavelength of uplink/downlink light path meet between insert row
Row relation, in master state, each local side light conversion unit described passes through the up wavelength division multiplexer of described east orientation and institute respectively
State the descending wavelength division multiplexer of east orientation through between optical add/drop multiplexer corresponding in ring topology and corresponding far-end light conversion unit
Descending wavelength division multiplexer transmits respectively with described east orientation to carry out the transmission of uplink/downlink light path and the up wavelength division multiplexer of described east orientation
The size of optical wavelength be to interleave arrangement, in stand-by state, described local side light conversion unit passes through described west respectively to up
Wavelength division multiplexer and described west to down going wave division multiplexer through optical add/drop multiplexer corresponding in ring topology and corresponding far-end
Carry out the transmission of uplink/downlink light path between light conversion unit and described west is divided to down going wave with described west to upgoing wave division multiplexer
The size of the optical wavelength that multiplexer transmits respectively is to interleave arrangement.
2. metro area Wavelength Division as claimed in claim 1 converges optical network access system it is characterised in that described metro area Wavelength Division converges
Optical network access system also includes the corresponding optical switch element of multiple and described each local side light conversion unit, in master state
When, the optical signal that described each local side light conversion unit sends is by corresponding optical switch element through the descending smooth wavelength-division of described east orientation
Multiplexer transmits and interleaves wave filter to described east orientation light and carry out descending optic path, the light that described each far-end light conversion unit send
Signal interleaves wave filter by described east orientation light and passes through the up light wavelength division multiplexing of described east orientation and corresponding optical switch element
Transport to corresponding far-end light conversion unit and carry out up optic path, in stand-by state, described each local side light conversion unit is sent out
The optical signal sending is transmitted to described west between light to descending light wavelength division multiplexing through described west by corresponding optical switch element
Plug in wave filter carries out descending optic path, and the optical signal that described each far-end light conversion unit send interleaves filter by described west to light
Ripple device transmits to corresponding far-end light conversion unit to up light wavelength division multiplexing and corresponding optical switch element through described west
Carry out up optic path.
3. metro area Wavelength Division as claimed in claim 2 converges optical network access system it is characterised in that each photoswitch list described
Unit includes light to be sent out switch and receives switch with light, and described light is sent out switch and described light and received switch and is respectively provided with three ends, described each
One end that light sends out switch is connected with corresponding local side light conversion unit, each light described send out the another two ends of switch respectively with described
The descending light wavelength division multiplexing of east orientation is connected to descending light wavelength division multiplexing with described west, and each light described receives one end and the institute of switch
Corresponding local side light conversion unit is connected, and smooth wavelength-division up with described east orientation is multiple respectively at the another two ends of each light transmit-receive switch described
It is connected to up light wavelength division multiplexing with described west with device.
4. metro area Wavelength Division as claimed in claim 3 converges optical network access system it is characterised in that described optical add/drop multiplexer
The direction that node connects in ring topology be divided into east orientation with west to, in the direction of the clock, previous optical add/drop multiplexer node
The west of east orientation and a rear optical add/drop multiplexer node to being connected, in ring topology two optical add/drop multiplexers adjacent in front and back it
Between optical fiber when breaking down, in ring topology clockwise before described local side light conversion unit is successively to fault optical fiber
In the corresponding far-end light conversion unit accessing of each optical add/drop multiplexer between optical add/drop multiplexer, turn with the far-end light of each access
The light of the corresponding light conversion unit connecting of change unit corresponding local side light conversion unit sends out switch with light receipts switch in master state
Lower work, in ring topology counterclockwise after fault optical fiber optical add/drop multiplexer successively to described local side light conversion unit
Between the corresponding far-end light conversion unit accessing of each optical add/drop multiplexer in, corresponding with the far-end light conversion unit of each access
The light of the corresponding light conversion unit connecting of local side light conversion unit is sent out switch and is worked in the stand-by state with light receipts switch.
5. a kind of metro area Wavelength Division converged light method for network access, it is used for realizing the business at multiple far-end light conversion unit ends and passes through
Multiple optical add/drop multiplexers access to the multiple corresponding local side light conversion unit of optical line terminal in central machine room, described light
It is connected through simple optical fiber successively between line terminal and described each optical add/drop multiplexer node and collectively form ring topology, described light
The local side light conversion unit of line terminal converts single through corresponding optical add/drop multiplexers multiple in ring topology and corresponding far-end light
Unit realizes uplink/downlink loop, and the direction that described optical add/drop multiplexer node connects in ring topology is divided into east orientation and west to pressing
Clockwise, the west of the east orientation of previous optical add/drop multiplexer node and a rear optical add/drop multiplexer node is to being connected, described city
Wavelength-division converged light method for network access in domain comprises the following steps:
Master state downlink optical signal in ring topology from described local side light conversion unit clockwise direction through an east orientation
After descending wavelength division multiplexer, then interleave wave filter through an east orientation light and transmit to corresponding far-end light from corresponding optical add/drop multiplexer
Conversion unit；
Master state uplink optical signal in ring topology from described far-end light conversion unit counter clockwise direction through described east orientation
Light interleaves after wave filter isolates uplink optical signal, then passes from corresponding optical add/drop multiplexer through the up wavelength division multiplexer of east orientation
Transport to corresponding local side light conversion unit and the wavelength of the uplink optical signal being transmitted with the size of the wavelength of downlink optical signal is
Interleave arrangement；
In the stand-by state traveling optical signal in ring topology from described local side light conversion unit counter clockwise direction through a west to
After descending wavelength division multiplexer, then interleave wave filter through a west to light and transmit to corresponding far-end light from corresponding optical add/drop multiplexer
Conversion unit；
Stand-by state uplink optical signal in ring topology from described far-end light conversion unit clockwise direction through described west to
Light interleaves after wave filter isolates uplink optical signal, then passes from corresponding optical add/drop multiplexer to upgoing wave division multiplexer through a west
Transport to corresponding local side light conversion unit and the wavelength of the uplink optical signal being transmitted with the size of the wavelength of downlink optical signal is
Interleave arrangement.
6. metro area Wavelength Division converged light method for network access as claimed in claim 5 is it is characterised in that before and after in ring topology
When optical fiber between two neighboring optical add/drop multiplexer breaks down, described metro area Wavelength Division converged light method for network access includes
Following steps:
From described local side light conversion unit along along ring topology clockwise to fault optical fiber front optical add/drop multiplexer it
Between link on optical signal realize uplink/downlink optic path under master state；
From described local side light conversion unit along along ring topology counterclockwise to fault optical fiber rear optical add/drop multiplexer it
Between link on optical signal realize uplink/downlink optic path in the stand-by state.
7. metro area Wavelength Division converged light method for network access as claimed in claim 6 it is characterised in that
From described local side light conversion unit along along ring topology clockwise to fault optical fiber front optical add/drop multiplexer it
Between link on downlink optical signal from described local side light conversion unit clockwise direction through corresponding optical add/drop multiplexer transmit to
Corresponding far-end light conversion unit；
From described local side light conversion unit along along ring topology counterclockwise to fault optical fiber front optical add/drop multiplexer it
Between link on uplink optical signal from described far-end light conversion unit counter clockwise direction through corresponding optical add/drop multiplexer transmit to
Corresponding local side light conversion unit；
From described local side light conversion unit along along ring topology counterclockwise to fault optical fiber rear optical add/drop multiplexer it
Between link on downlink optical signal from described local side light conversion unit counter clockwise direction through corresponding optical add/drop multiplexer transmit to
Corresponding far-end light conversion unit；
From described local side light conversion unit along along ring topology counterclockwise to fault optical fiber rear optical add/drop multiplexer it
Between link on uplink optical signal from described far-end light conversion unit clockwise direction through corresponding optical add/drop multiplexer transmit to
Corresponding local side light conversion unit.
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| WO2013029385A1 (en) * | 2011-09-02 | 2013-03-07 | 中兴通讯股份有限公司 | Data interaction system and method thereof |
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Address after: 430074, No. 88, postal academy road, Hongshan District, Hubei, Wuhan Patentee after: Wuhan post and Telecommunications Science Research Institute Co., Ltd. Address before: 430074, No. 88, postal academy road, Hongshan District, Hubei, Wuhan Patentee before: Wuhan Inst. of Post & Telecom Science |