CN104022927B - Gu move fusion wavelength-division access ring and cut-in method - Google Patents
Gu move fusion wavelength-division access ring and cut-in method Download PDFInfo
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Abstract
Wavelength-division access ring and cut-in method are merged the invention discloses a kind of solid move, is related to metropolitan area access field, the access ring is using CO OLT as network convergent point, and constituting has primary, spare fibre in ring topology, ring, and each area business accesses OADM by R OTU；Master state：Down direction, CO OLT are sent to OADM signal clockwise transmission in primary optical fiber；Up direction, OADM is sent to CO OLT signal counterclockwise transmission in primary optical fiber；Stand-by state：Trouble point close to node signal is switched to after spare fibre, CO OLT are sent to the OADM signal counterclockwise transmission in spare fibre, and OADM is sent to the CO OLT signal clockwise transmission in spare fibre.The present invention can meet the robustness requirement of inexpensive requirement, mobile retransmission and the big customer's special line of fixed access, be easy to networking and O＆M, also be compliant with big bandwidth access, network flattening trend, and bandwidth allocation flexibly, is easily upgraded.
Description
Technical field
The present invention relates to metropolitan area access field, and in particular to a kind of solid move merges wavelength-division access ring and cut-in method.
Background technology
According to " broadband China " strategy, in order to meet the sustainable growth of user's access bandwidth demand, China's prosperity city is used
Family access bandwidth should reach 1Gb/s (G bits per seconds) in the year two thousand twenty.Due to being to face vast domestic consumer, access technology is most
Important requirement is low cost.Therefore, advantageous PON (Passive Optical Network, passive light in terms of cost
Network) because Large Copacity, big bandwidth and as access field major technique.EPON(Ethernet Passive Optical
Network, Ethernet passive optical network)/GPON (Gigabit-Capable PON, G bits Ethernet passive optical network) exists
Global extensive commercial, 10GEPON/GPON steps into market, and standardization body is then formulating TWDM-PON (Time
And Wavelength Division Multiplexing PON, time-division Wave division multiplexing passive optical network) etc. more Large Copacity
Soft exchange technology of future generation.
Mobile broadband facilitates characteristic to be increasingly becoming another main access way with it.In order to improve the speed of mobile broadband
Rate, operator is carrying out 4G/LTE (Long Term Evolution, Long Term Evolution) construction, and the bandwidth demand of base station is by 2G/
The 100000000 of 3G epoch bring up to Gb/s magnitudes.4G mobile retransmissions and forward pass network not only continue to emphasize high robust and OAM
(Operation Administration and Maintenance, operation, management, maintenance) ability, and important requirement is big
Width lifts bandwidth ability.In addition, with the sustainable development of the technologies such as internet, Internet of Things, cloud computing, the integration of three networks and business,
The bandwidth of big customer's special line, WiFi (Wireless Fidelity, Wireless Fidelity) focus etc., which is also required that, to be continued to increase.
In communication network development course, the fixed broadband for having gradually formed operator accesses/converged net, mobile retransmission net
The situation safeguarded separately is built, the former focuses on building dimension cost, and the latter emphasizes network quality.The propulsion reformed with telecommunications, operation
Business develops into full-service operator, Gu moving fusion rises to carrier market Competitive Needs, the fixed or mobile network network of metro edge melts
Conjunction is to alleviate cost pressure, realize the basis for moving integrated services admittedly.But, the technology of PON classes can not meet mobile retransmission, bus
The high-quality requirement of family special line etc., MSTP (put down by Multi-Service Transmission Platform, multi-service transportation
Platform), PTN (Packet Transport Network, Packet Transport Network)/IPRAN (IP Radio Access Network
Carrier, IPization wireless backhaul bearer network) etc. technology then made it impossible in cost as domestic consumer's access means.Cause
This, the communications field need it is a kind of in network quality and build in dimension cost and meet the multiple business features such as solid, shifting, special line, be suitable for
Solid, the shifting UNE of metropolitan area input field.
The content of the invention
The invention aims to overcome the shortcomings of above-mentioned background technology there is provided it is a kind of solid move fusion wavelength-division access ring and
Cut-in method, the robustness requirement of low cost requirement, mobile retransmission and the big customer's special line of fixed access etc. can be met simultaneously,
It is easy to networking and O＆M, also is compliant with the trend such as big bandwidth access, network flattening；Bandwidth allocation is had concurrently flexibly, easily to upgrade
Characteristic, be expected to turn into and meet operator's desired metropolitan area fusion access system.
The present invention provides a kind of solid shifting fusion wavelength-division access ring, including central machine room optical line terminal CO OLT, m light point
Insert multiplexer OADM nodes and some distal end optical transport unit R-OTU, using CO OLT as network convergent point, CO OLT and m
OADM nodes collectively form ring topology, and m is shared m+1 node in the positive integer more than or equal to 1, the ring topology, each
Node point east E, western W both directions, annexation of the m+1 node in ring topology is represented with E, W, in the direction of the clock,
The E of previous node is to the W with latter node to being connected；In addition to CO OLT, the OADM nodes in ring topology are by numbering clockwise
For OADM1, OADM2 ..., OADM m-1, OADM m；
There is each area business around primary optical fiber and spare fibre, ring topology to pass through R-OTU in the ring topology
Access corresponding OADM nodes；Under master state：Down direction, CO OLT are sent to the signal of OADM nodes in primary optical fiber
Clockwise transmission, i.e., be sent to the W of latter node from the E of previous node；Up direction, the signal that OADM nodes are sent to CO OLT exists
Counterclockwise transmission in primary optical fiber, i.e., be sent to the E of latter node from the W of previous node；In the stand-by state：Before and after trouble point
Close to node signal is switched to after spare fibre, down direction, CO OLT are sent to the signal of OADM nodes in spare fibre
Middle counterclockwise transmission；Up direction, OADM nodes are sent to the CO OLT signal clockwise transmission in spare fibre；Opened up when ring-like
Flutter between two neighboring OADM nodes when breaking down, standby light is connected through between two OADM nodes of failure
Fibre detours, and works in the stand-by state；Signal between remaining OADM node is transmitted in primary optical fiber, the work under master state
Make；
CO OLT are equipped with some local side optical transport unit O-OTU, and each O-OTU is through m OADM node in ring topology
Uplink/downlink loop is realized with corresponding R-OTU：Each OADM nodes carry out the straight-through of each wavelength channel, up/down, and R-OTU passes through
OADM node up/down loops, are corresponded between O-OTU and R-OTU according to up-downgoing wavelength arrangement, and up, down going wave is covered with
Foot interleaves Rankine-Hugoniot relations.
On the basis of above-mentioned technical proposal, the CO OLT include k upper united mouth, convergence module, some O-
OTU, descending wavelength division multiplexer, descending image intensifer, up wavelength division multiplexer, up image intensifer,
One light interleaves wave filter and 2 × 2 photoswitches, and k is positive integer, and k upper united mouth is connected with Metro core network respectively, convergence
Module completes the convergence of miscellaneous service in all O-OTU；All O-OTU sending port is connected with descending wavelength division multiplexer,
All O-OTU receiving port is connected with up wavelength division multiplexer, each O-OTU correspond to respectively downstream wavelength passage and
One upstream wavelength passage；Descending wavelength division multiplexer interleaves wave filter by descending image intensifer and light and is connected, and up wavelength-division is answered
Wave filter is interleave with device by up image intensifer and light to be connected, light interleaves the separation that wave filter completes up-downgoing wavelength；
Light interleave wave filter by 2 × 2 photoswitches respectively with the primary optical fiber and spare fibre phase in ring topology
Even：2 × 2 photoswitches include 4 ports：First port, second port, the 3rd port, the 4th port, under master state, the
Single port and the 4th port UNICOM, second port and the 3rd port UNICOM；When being switched to stand-by state, first port and the 3rd end
Mouth UNICOM, second port and the 4th port UNICOM；
The first port of 2 × 2 photoswitches is connected with east orientation spare fibre Eb, and second port and the light of 2 × 2 photoswitches interleave
The output end of wave filter is connected, and the 3rd port of 2 × 2 photoswitches is connected with the primary optical fiber of east orientation, the 4th end of 2 × 2 photoswitches
Mouth is connected with west to spare fibre.
On the basis of above-mentioned technical proposal, each OADM nodes in the ring topology include a wavelength selection
WSS, west are switched to 2 × 2 photoswitch OSW, the photoswitch OS of east orientation 2 × 2EWith some R-OTU, WSS include main light port, one
Straight-through optical port and some local optical ports up and down, the up/down loop of the local wavelength of WSS completions, and other wavelength are straight-through；OSW、
OSEIt is identical with the characteristic of 2 × 2 photoswitches in CO OLT, OSWFirst port and OSEFirst port be connected, OSWThe 3rd
Port is connected with WSS main light port, OSWSecond port with west be connected to primary optical fiber, OSWThe 4th port with west to standby
Optical fiber is connected；OSEThe 3rd port be connected with WSS straight-through optical port, OSESecond port be connected with the primary optical fiber of east orientation, OSE
The 4th port be connected with east orientation spare fibre；
When being broken down between two neighboring OADM nodes in ring topology, it is only necessary to close to two photoswitches of trouble point
Signal between switching, two OADM nodes of failure detours through spare fibre, works in the stand-by state；Other light are opened
Pass is failure to actuate, and the signal between remaining OADM node is transmitted in primary optical fiber, is worked under master state.
On the basis of above-mentioned technical proposal, the line interface of the R-OTU includes circuit transmission interface LTXConnect with circuit
Receive interface LRX, the WSS local circuit transmission interface L of optical port respectively with R-OTU up and downTXWith line receiver interface LRXIt is connected.
On the basis of above-mentioned technical proposal, the client side interface of the R-OTU includes a customer side transmission interface CTX
With a customer side receiving interface CRX。
On the basis of above-mentioned technical proposal, the R-OTU provides multigroup client side interface using branch road multiple connection technology, i.e.,
R-OTU includes multiple customer side transmission interface CTXWith multiple customer side receiving interface CRX。
On the basis of above-mentioned technical proposal, R-OTU access FTTx user, digital subscriber line access multiplex,
Big customer's special line or mobile base station.
On the basis of above-mentioned technical proposal, the Metro core network includes IP/MPLS core nets, mobile core network.
On the basis of above-mentioned technical proposal, when O-OTU, R-OTU for working in a pair of uplink/downlink wavelength connect for PON
Fashionable, the physical layer function in PON is realized in R-OTU client side interface, media access control/Transmission Convergence in PON
Function is realized in O-OTU.
The present invention also provides a kind of solid shifting fusion wavelength-division cut-in method based on above-mentioned access ring, comprises the following steps：
Under master state：Down direction, CO OLT are sent to the signal of OADM nodes clockwise transmission in primary optical fiber,
The W of latter node is sent to from the E of previous node；Up direction, OADM nodes are sent to CO OLT signal in primary optical fiber
Counterclockwise transmission, i.e., be sent to the E of latter node from the W of previous node；Up, downstream wavelength meets and interleaves Rankine-Hugoniot relations；
In the stand-by state：Before and after the trouble point close to node signal is switched to spare fibre after, down direction, CO
OLT is sent to the signals of the OADM nodes counterclockwise transmission in spare fibre；Up direction, OADM nodes are sent to CO OLT signal
The clockwise transmission in spare fibre；
When being broken down between two neighboring OADM nodes in ring topology, between two OADM nodes of failure
The spare fibre that is connected through detour, work in the stand-by state；Signal between remaining OADM node is passed in primary optical fiber
It is defeated, worked under master state.
Compared with prior art, advantages of the present invention is as follows：
(1) present invention realizes that length flexible is distributed using OADM, and only needing a WSS, (OADM in common wdm system needs 4
Individual WSS), OADM cost can be effectively reduced, the low cost requirement of fixed access is met.
(2) star-like feature (all business are concentrated to the central office) cyclization of business during the present invention is accessed using metropolitan area, in CO
Finishing service is converged at OLT, Loop Protection is realized, to reach the robustness requirement of mobile retransmission and big customer's special line etc..
(3) present invention can realize one 0/1 layer network system of all business such as fixed broadband, movement, the special line of operator
One access, is easy to networking and O＆M；The electrical domain processing that MSTP, IPRAN/PTN etc. are complicated, green energy conservation can be avoided.
(4) present invention passes through the different arrangement of up-downgoing wavelength, it is to avoid rayieigh backscatter and reflection are to transmission quality
Influence.
(5) present invention realizes big bandwidth access using wavelength-division multiplex technique, realizes that the convergent type connects by light amplification and OTU
Enter the super large covering radius of network, meet the trend such as big bandwidth access, network flattening.
(6) present invention breaks the various/PON technologies of constraint plan for to(for) wavelength by OTU wavelength convert, with realization
Various/coexisting and upgrade on demand for PON technologies, have concurrently bandwidth allocation flexibly, the characteristic easily upgraded, be expected to turn into and meet operation
The desired metropolitan area fusion access system of business.
Brief description of the drawings
Fig. 1 is the solid structured flowchart for moving fusion wavelength-division access ring in the embodiment of the present invention.
Fig. 2 is the structured flowchart of CO OLT in the embodiment of the present invention.
Fig. 3 is the structured flowchart of OADM nodes in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.
Shown in Figure 1, the embodiment of the present invention provides a kind of solid move and merges wavelength-division access ring, including CO (Central
Office, central machine room) OLT (Optical Line Terminal, optical line terminal), m OADM (Optical Add-
Drop Multiplexer, optical add/drop multiplexer) node and some R-OTU (Remote-Optical Transport Unit,
Distal end optical transport unit), using CO OLT as network convergent point, CO OLT and m OADM node collectively form ring topology, m
For the positive integer more than or equal to 1, m+1 node is had in the ring topology, each node divides E (east), W (west) both direction,
Represent annexation of the m+1 node in ring topology with E (east), W (west), in the direction of the clock, the E of previous node to
The W of latter node to be connected；In addition to CO OLT, OADM nodes in ring topology by numbering clockwise be OADM1,
OADM2、…、OADM m-1、OADM m；There are two optical fiber in ring topology：Primary (work) optical fiber Fw and standby (backup)
Each region (Area) business around optical fiber Fb, ring topology accesses corresponding OADM nodes by R-OTU.
The embodiment of the present invention also provides a kind of solid shifting fusion wavelength-division cut-in method based on above-mentioned access ring, including following step
Suddenly：
Under master state：Down direction, CO OLT are sent to the signal of OADM nodes clockwise transmission in primary optical fiber,
The W of latter node is sent to from the E of previous node；Up direction, OADM nodes are sent to CO OLT signal in primary optical fiber
Counterclockwise transmission, i.e., be sent to the E of latter node from the W of previous node；In the stand-by state：Before and after trouble point close to node
Signal is switched to after spare fibre, down direction, the signal that CO OLT are sent to OADM nodes is passed counterclockwise in spare fibre
It is defeated；Up direction, OADM nodes are sent to the CO OLT signal clockwise transmission in spare fibre.
When being broken down between two neighboring OADM nodes in ring topology, for example：When in ring topology OADM i and
When optical fiber between OADM i+1 breaks down, i is positive integer, two OADM nodes (i.e. OADM i and OADM of failure
I+1 the spare fibre that is connected through between) detours, and works in the stand-by state；Signal between remaining OADM node is primary
Transmit, worked under master state in optical fiber.
CO OLT equipped with some O-OTU (Office-Optical Transport Unit, local side optical transport unit),
Each O-OTU realizes uplink/downlink loop through m OADM node in ring topology with corresponding R-OTU：Each OADM nodes are carried out
The straight-through of each wavelength channel, up/down, R-OTU pass through OADM node up/down loops.According to up-downgoing between O-OTU and R-OTU
Wavelength arrangement is corresponded.
Up, downstream wavelength meets and interleaves Rankine-Hugoniot relations.For example, up use C wavelength, descending use C+ wavelength；Or
Up use L wavelength, descending use L+ wavelength；Or can up use C and L, descending use C+ and L+.Certainly, C and C+, or L
And L+, it can also exchange.In a word, up, downstream wavelength can be set according to need, as long as between ensureing that up, downstream wavelength is met
Insert Rankine-Hugoniot relations.
Shown in Figure 2, CO OLT include k upper united mouth, convergence module, some O-OTU, a descending wavelength-division and answered
Interleave with device, a descending image intensifer, a up wavelength division multiplexer, a up image intensifer, a light wave filter and
One 2 × 2 photoswitch, k is positive integer, and k upper united mouth is connected with Metro core network respectively, and Metro core network includes IP/MPLS
Core net, mobile core network etc..Convergence module completes the convergence of miscellaneous service in all O-OTU；All O-OTU sending port
It is connected with descending wavelength division multiplexer, all O-OTU receiving port is connected with up wavelength division multiplexer, each O-OTU points
Dui Ying not a downstream wavelength passage and a upstream wavelength passage；Descending wavelength division multiplexer passes through between descending image intensifer and light
Plug in wave filter to be connected, up wavelength division multiplexer interleaves wave filter by up image intensifer and light and is connected, and it is complete that light interleaves wave filter
Into the separation of up-downgoing wavelength, light interleave wave filter by 2 × 2 photoswitches respectively with the primary optical fiber in ring topology and
Spare fibre is connected.
2 × 2 photoswitches include 4 ports：Port 1, port 2, port 3, port 4, under master state, port 1 and end
4 UNICOMs of mouth, port 2 and the UNICOM of port 3；When being switched to stand-by state, port 1 and the UNICOM of port 3, port 2 and the UNICOM of port 4.
The port 1 of 2 × 2 photoswitches is connected with east orientation spare fibre Eb, and port 2 and the light of 2 × 2 photoswitches interleave wave filter
Output end be connected, the port 3 of 2 × 2 photoswitches is connected with the primary optical fiber Ew of east orientation, and the ports 4 of 2 × 2 photoswitches is with western to standby
It is connected with optical fiber Wb.
Up, downstream wavelength meets and interleaves Rankine-Hugoniot relations.Carried out by taking up use C wavelength, descending use C+ wavelength as an example
Explanation：Descending wavelength division multiplexer in Fig. 2 is C MUX (wavelength division multiplexer), and up wavelength division multiplexer is C+MUX, and light interleaves filter
Ripple device is C/C+Interleaver (light interleaves wave filter).
Shown in Figure 3, each OADM nodes in ring topology include a WSS (Wavelength
Selective Switch, wavelength-selective switches), west is to 2 × 2 photoswitches (OS, Optical Switcher) OSW, east orientation 2 ×
2 photoswitch OSEInclude a main light port, a straight-through optical port and some local optical ports up and down with some R-OTU, WSS, WSS is complete
Cost wavelength up/down loop, and other wavelength is straight-through；OSW、OSEWith the characteristic phase of 2 × 2 photoswitches in CO OLT
Together, OSWPort 1 and OSEPort 1 be connected, OSWPort 3 be connected with WSS main light port, OSWPort 2 with west to primary
Optical fiber Ww is connected, OSWPort 4 with west be connected to spare fibre Wb；OSEPort 3 be connected with WSS straight-through optical port, OSE's
Port 2 is connected with the primary optical fiber Ew of east orientation, OSEPort 4 be connected with east orientation spare fibre Eb.
When being broken down between two neighboring OADM nodes in ring topology, it is only necessary to close to two photoswitches of trouble point
Signal between switching, two OADM nodes of failure detours through spare fibre Fb, works in the stand-by state；Other light
Switch is failure to actuate, and the signal between remaining OADM node is transmitted in primary optical fiber Fw, is worked under master state.
For example：Optical fiber between OADM i and OADM i+1 breaks down in ring topology when disconnecting, and OADM i E is to light
Switch switching, OADM i+1 W switches to photoswitch, and the signal between OADM i and OADM i+1 detours through spare fibre Fb, its
Its photoswitch is failure to actuate, and the signal between remaining OADM node is transmitted in primary optical fiber Fw, is worked under master state.
R-OTU line interface includes circuit transmission interface LTXWith line receiver interface LRX, WSS local optical port up and down
Respectively with R-OTU circuit transmission interface LTXWith line receiver interface LRXIt is connected.R-OTU client side interface includes a visitor
Family side transmission interface CTXWith a customer side receiving interface CRX；R-OTU can also use TMUX
(TributaryMultiplexing, branch road multiple connection) technology provides multigroup client side interface, i.e. R-OTU includes multiple customer sides
Transmission interface CTXWith multiple customer side receiving interface CRX.If business is unidirectional, for example, only receives or send, then R-OTU
Including customer side transmission interface CTXOr only include customer side receiving interface CRX。
R-OTU can access the region 1 shown in Fig. 1, region 2, region 3, the business in region 4, for example：FTTx(Fiber-
To-the-x, intelligent acess) user, DSLAM (Digital Subscriber Line Access Multiplexer, numeral
Subscribers' line couple in multiplexer), big customer's special line, mobile base station etc..
Some R-OTU being connected with the OADM nodes in ring topology, can both exist together placement with the OADM nodes, also may be used
To be placed as needed with the different place of OADM nodes, for example, it is placed at mobile base station or big customer.
When O-OTU, R-OTU for working in a pair of uplink/downlink wavelength, which are used for PON, to be accessed, the PHY (Physical in PON
Layer, physical layer) layer function (such as burst reception) realizes in R-OTU client side interface, the MAC (Media in PON
Access Control, media access control)/TC (Transmission Convergence, Transmission Convergence) function is (as suitable
Match somebody with somebody, Dynamic Bandwidth Allocation, ranging etc.) realized in O-OTU.
Those skilled in the art can carry out various modifications and variations to the embodiment of the present invention, if these modifications and change
Type is within the scope of the claims in the present invention and its equivalent technologies, then these modifications and variations are also in protection scope of the present invention
Within.
The prior art that the content not being described in detail in specification is known to the skilled person.
Claims (10)
1. a kind of solid move merges wavelength-division access ring, including OLT, m optical add/drop multiplexer OADM of central machine room optical line terminal CO
Node and some distal end optical transport unit R-OTU, using CO OLT as network convergent point, CO OLT and m OADM node are common
Ring topology is constituted, m is shared m+1 node in the positive integer more than or equal to 1, the ring topology, each node point east E, western W
Both direction, annexation of the m+1 node in ring topology is represented with E, W, in the direction of the clock, the E of previous node to
W with latter node is to being connected；In addition to CO OLT, OADM nodes in ring topology are OADM 1, OADM by numbering clockwise
2nd ..., OADM m-1, OADM m, it is characterised in that：
There is each area business around primary optical fiber and spare fibre, ring topology to be accessed by R-OTU in the ring topology
Corresponding OADM nodes；Under master state：Down direction, CO OLT are sent to the signal of OADM nodes up time in primary optical fiber
Pin is transmitted, i.e., the W of latter node is sent to from the E of previous node；Up direction, OADM nodes are sent to CO OLT signal primary
Counterclockwise transmission in optical fiber, i.e., be sent to the E of latter node from the W of previous node；In the stand-by state：Before and after trouble point close to
Node signal is switched to after spare fibre, down direction, the signal that CO OLT are sent to OADM nodes is inverse in spare fibre
Hour hands are transmitted；Up direction, OADM nodes are sent to the CO OLT signal clockwise transmission in spare fibre；When in ring topology
When being broken down between two neighboring OADM nodes, between two OADM nodes of failure be connected through spare fibre around
OK, work in the stand-by state；Signal between remaining OADM node is transmitted in primary optical fiber, is worked under master state；
CO OLT equipped with some local side optical transport unit O-OTU, each O-OTU through m OADM node in ring topology with it is right
The R-OTU answered realizes uplink/downlink loop：Each OADM nodes carry out the straight-through of each wavelength channel, uplink/downlink, and R-OTU passes through
OADM nodes realize up/down loop, are corresponded between O-OTU and R-OTU according to up-downgoing wavelength arrangement, up, down going wave
Long satisfaction interleaves Rankine-Hugoniot relations.
2. solid move as claimed in claim 1 merges wavelength-division access ring, it is characterised in that：The CO OLT include k upper united mouth,
One convergence module, some O-OTU, 0 traveling wave division multiplexer, descending image intensifer, a up wavelength-division multiplex under one
Device, a up image intensifer, a light interleave wave filter and 2 × 2 photoswitches, and k is positive integer, k upper united mouth difference
It is connected with Metro core network, convergence module completes the convergence of miscellaneous service in all O-OTU；All O-OTU sending port is equal
It is connected with descending wavelength division multiplexer, all O-OTU receiving port is connected with up wavelength division multiplexer, each O-OTU difference
One downstream wavelength passage of correspondence and a upstream wavelength passage；Descending wavelength division multiplexer is interleave by descending image intensifer and light
Wave filter is connected, and up wavelength division multiplexer interleaves wave filter by up image intensifer and light and is connected, and light interleaves wave filter completion
The separation of up-downgoing wavelength；
Light interleaves wave filter and is connected respectively with the primary optical fiber and spare fibre in ring topology by 2 × 2 photoswitches：2
× 2 photoswitches include 4 ports：First port, second port, the 3rd port, the 4th port, under master state, first end
Mouth and the 4th port UNICOM, second port and the 3rd port UNICOM；When being switched to stand-by state, first port joins with the 3rd port
It is logical, second port and the 4th port UNICOM；
The first port of 2 × 2 photoswitches is connected with east orientation spare fibre Eb, and second port and the light of 2 × 2 photoswitches interleave filtering
The output end of device is connected, and the 3rd port of 2 × 2 photoswitches is connected with the primary optical fiber of east orientation, the 4th port of 2 × 2 photoswitches and
West is connected to spare fibre.
3. solid move as claimed in claim 2 merges wavelength-division access ring, it is characterised in that：Each OADM in the ring topology
Node includes wavelength-selective switches WSS, west to 2 × 2 photoswitch OSW, the photoswitch OS of east orientation 2 × 2EWith some R-OTU,
WSS includes a main light port, a straight-through optical port and some local optical ports up and down, and WSS completes the up/down loop of local wavelength,
And other wavelength is straight-through；OSW、OSEIt is identical with the characteristic of 2 × 2 photoswitches in CO OLT, OSWFirst port and OSE
First port be connected, OSWThe 3rd port be connected with WSS main light port, OSWSecond port with west be connected to primary optical fiber,
OSWThe 4th port with west be connected to spare fibre；OSEThe 3rd port be connected with WSS straight-through optical port, OSESecond port
It is connected with the primary optical fiber of east orientation, OSEThe 4th port be connected with east orientation spare fibre；
When being broken down between two neighboring OADM nodes in ring topology, it is only necessary to which two photoswitches close to trouble point are cut
Change, the signal between two OADM nodes of failure detours through spare fibre, works in the stand-by state；Other photoswitches
It is failure to actuate, the signal between remaining OADM node is transmitted in primary optical fiber, is worked under master state.
4. solid move as claimed in claim 3 merges wavelength-division access ring, it is characterised in that：The line interface of the R-OTU includes
Circuit transmission interface LTXWith line receiver interface LRX, the WSS local circuit transmission interface L of optical port respectively with R-OTU up and downTX
With line receiver interface LRXIt is connected.
5. solid move as claimed in claim 3 merges wavelength-division access ring, it is characterised in that：The client side interface bag of the R-OTU
Include a customer side transmission interface CTXWith a customer side receiving interface CRX。
6. solid move as claimed in claim 3 merges wavelength-division access ring, it is characterised in that：The R-OTU uses branch road multiple connection skill
Art provides multigroup client side interface, i.e. R-OTU includes multiple customer side transmission interface CTXWith multiple customer side receiving interface CRX。
7. the solid shifting fusion wavelength-division access ring as any one of claim 1 to 6, it is characterised in that：The R-OTU accesses
FTTx user, digital subscriber line access multiplex, big customer's special line or mobile base station.
8. the solid shifting fusion wavelength-division access ring as any one of claim 2 to 6, it is characterised in that：The metro core
Net includes IP/MPLS core nets, mobile core network.
9. the solid shifting fusion wavelength-division access ring as any one of claim 1 to 6, it is characterised in that：When working in a pair
When O-OTU, R-OTU of uplink/downlink wavelength are used for PON accesses, the physical layer function in PON is in R-OTU client side interface
Realize, media access control/Transmission Convergence function in PON is realized in O-OTU.
10. a kind of solid shifting fusion wavelength-division cut-in method based on access ring any one of claim 1 to 9, its feature exists
In comprising the following steps：
Under master state：Down direction, CO OLT are sent to the signal of OADM nodes clockwise transmission in primary optical fiber, i.e., from
The E of previous node is sent to the W of latter node；Up direction, OADM nodes are sent to CO OLT signal inverse time in primary optical fiber
Pin is transmitted, i.e., the E of latter node is sent to from the W of previous node；Up, downstream wavelength meets and interleaves Rankine-Hugoniot relations；
In the stand-by state：Before and after the trouble point close to node signal is switched to spare fibre after, down direction, CO OLT
It is sent to the signals of the OADM nodes counterclockwise transmission in spare fibre；Up direction, the signal that OADM nodes are sent to CO OLT exists
Clockwise transmission in spare fibre；
When being broken down between two neighboring OADM nodes in ring topology, the company between two OADM nodes of failure
Connect and detoured by spare fibre, worked in the stand-by state；Signal between remaining OADM node is transmitted in primary optical fiber,
Worked under master state.
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| CN104868968B (en) * | 2015-06-03 | 2017-10-10 | 武汉邮电科学研究院 | The wavelength-division based on supervisory wavelength for accessing protection ring for wavelength-division accesses guard method |
| CN106130840B (en) * | 2016-07-15 | 2019-04-30 | 武汉邮电科学研究院 | A kind of fixation, mobile broadband fusion access planar network architecture |
| CN109639387B (en) * | 2018-12-25 | 2020-11-10 | 苏州智汇云祥通信***有限公司 | Multi-system anti-interference filtering method based on digital system transmission |
| CN112492410B (en) * | 2019-09-12 | 2023-07-21 | 中兴通讯股份有限公司 | OAM information transmission method, device, equipment and medium for mobile forwarding |
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