CN1859062B - Protective method for sharing wave length conversion unit, realizing device and application system - Google Patents
Protective method for sharing wave length conversion unit, realizing device and application system Download PDFInfo
- Publication number
- CN1859062B CN1859062B CN2006100600665A CN200610060066A CN1859062B CN 1859062 B CN1859062 B CN 1859062B CN 2006100600665 A CN2006100600665 A CN 2006100600665A CN 200610060066 A CN200610060066 A CN 200610060066A CN 1859062 B CN1859062 B CN 1859062B
- Authority
- CN
- China
- Prior art keywords
- unit
- wavelength
- backup
- otu
- road
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Optical Communication System (AREA)
Abstract
This invention provides an OUT share protection method including: A, converting the service signals carried by fault OUT to a backup OUT, B, switching the converted backup wavelength signal to the aim node of said service signal, C, finishing the end to the backup wavelength signal at the aim node and converting the service signal to a corresponding service side process unit. This invention also provides an OTC share protection device and a system capable of realizing OTC share, at the same time, multiple nodes with a same aim or different aims are allowed to share one backup OTC so as to reduce the configuration numbers of the OTC.
Description
Technical field
The present invention relates to the dense wavelength division multiplexing system equipment protection, in particular, a kind of protective method for wave length conversion unit sharing, implement device and application system.
Background technology
More common optical wavelength path protection mode has two kinds in dense wave division multipurpose (DWDM, Dense Wavelength Division Multiplexing) system: N:M and N+M optical wavelength protected mode.
The working method of N:M as shown in Figure 1, N backup optical wavelength channel transmits low priority traffice when system's fault-free, but when certain or several optical wavelength passages in M the optical wavelength passage break down, the low priority traffice of backup path is dropped, and the business of faulty channel is switched to backup path to be transmitted.In most of the cases, N is often less than M, if this moment the operation wavelength channel failure, the backup wavelength channel often can't recover business fully, so N:M optical wavelength path protection often is not used for protecting path failure, and as the protection of wavelength converting equipment.Be that the operation wavelength passage is selected identical path with backup path, only at operation wavelength converting unit (OTU, OpticalTransmit Unit) after appearance was lost efficacy, the business that OTU bore of just will working was forwarded to backup OTU, utilizes backup OTU to finish the transmission of business.
Under the N:M protected mode, backup OTU often also carries the extra traffic of some low priorities, and these low priority extra traffics also have different priority.As certain work OTU when breaking down, backup path business that can priority is minimum is abandoned, and the service signal of simultaneous faults unit is switched to this backup OTU through the N*M cross matrix and transmitted.When another one work OTU breaks down, this moment, system can check the priority of a remaining N-1 extra traffic, with determine this with the fault switching services to which back up wavelength channel, system can control N*M and switch matrix after inquiry, the switching services of the faulty channel backup wavelength channel that is not used to lowest priority is transmitted, certainly, the former low priority traffice of this wavelength channel can be abandoned.So analogize, progressively realize the backup protection of N backup wavelength channel M service aisle business.
For N+M optical wavelength path protection mode; when operate as normal; M operation wavelength passage bearer service; N backup wavelength channel unit then is in the Hot Spare state; each backup wavelength channel all carries out the Hot Spare protection to a corresponding operation wavelength passage, promptly backs up wavelength channel and the identical business of operation wavelength passage carrying.Because be Hot Spare, often require backup path quantity to be equal to or greater than the operation wavelength passage, so modal N+M protection form is exactly 1+1.When certain protected operation wavelength passage broke down, receiving terminal can compare the quality of service of the backup wavelength channel of operation wavelength passage and correspondence, selected backup wavelength channel loaded service to finish defencive function.N+M optical wavelength path protection can be selected to back up wavelength channel and not walk identical path with the operation wavelength passage, so N+M optical wavelength path protection often possesses OTU equipment protection and path protection function simultaneously.
No matter be N:M or N+M optical wavelength path protection mode, as OTU equipment protection purposes the time, all required N backup wavelength channel to use as backup.At Chinese application number is the patent of invention " based on the optical channel protector and the method for WDM layer " of CN02125068.5; mentioned a kind of N:M optical wavelength channel protection method; by introducing the array of photoswitch of N:M; realize the protection of N backup OTU to M work OTU; need in this method to distribute wavelength channel for backup OTU in advance; no matter back up OTU and whether use, all need to take this wavelength resource node.At Chinese application number is the patent of invention " the logical guard method of optical wavelength and the device that are used for dense wavelength division multiplexing system " of CN02144172.3; mentioned another kind of N:M optical wavelength channel protection method; by using the OTU and the wave multiplexer of tunable wave length; need not to allocate the wavelength resource node in advance for backup OTU; but after certain work OTU breaks down; to specify the backup OTU that substitutes to use the wavelength resource node identical, thereby improve the wavelength utilization ratio with fail operation OTU.
But above-mentioned two kinds of prior aries all require backup OTU all to have identical source node and destination node with work OTU.When all having professional the connection between a plurality of nodes, need connect a plurality of backup OTU of configuration for the business of different source nodes or various objectives node, cause the redundant configuration of resource backup node.If the professional corresponding destination node that a plurality of OTU unit of a website is transmitted is different nodes, then the OTU unit share protect method of the N:M of prior art can't realize that these OTU unit share identical backup OTU unit.
And in real network; it is considerably less that the situation that a plurality of OTU lost efficacy appears in website simultaneously; therefore adopt the OTU equipment share protect method of the N:M of prior art; can distinguish protection to the OTU group of a plurality of destination nodes; the backup OTU quantity of configuration increases greatly, thereby has increased system protection cost and maintenance cost.
Therefore, there is defective in prior art, needs to improve.
Summary of the invention
The object of the present invention is to provide a kind of OTU share protect method, no matter whether the professional corresponding destination node that transmitted of a plurality of OTU unit of same website is identical, can share identical backup OTU; Implement device and application system that the present invention simultaneously also provides OTU to share.
Technical scheme of the present invention is as follows:
A kind of OTU share protect device, comprise professional switch unit, backup OTU, wavelength selectivity interleaver, wherein: described professional switch unit is used for fail operation OTU institute loaded service information switching to backing up OTU, or the described backup business information that OTU exported is switched to corresponding service side processing unit; Described backup OTU is used to finish the mutual conversion between described business information and the wavelength signals; Described wavelength selectivity interleaver is used for the described backup backup wavelength signals that OTU changed and other wavelength signals are merged into one the tunnel and send to next website, or described backup wavelength signals is separated and sent to the backup OTU of correspondence from other wavelength signals.
Described protective device, wherein, the described wavelength selectivity interleaver of sending direction adopts the Wavelength-independent coupler to substitute the road of closing of finishing described backup wavelength signals and other wavelength signals.
Described protective device further comprises a deciliter unit, road, and the backup wavelength signals that described backup OTU is changed provides protection by unit, described deciliter road to the work OTU of at least two different directions.
Described protective device, wherein, unit, described deciliter road is light deciliter unit, road, electricity deciliter unit, road, light electric combiner unit or photosynthetic road electricity branching unit along separate routes.
Described protective device, wherein, unit, described deciliter road is made up of optical switch, coupler, electric switch, electric coupling.
Described protective device, wherein, it also comprises optical multiplex unit/Optical Demultiplexing unit; Described optical multiplex unit is used for a plurality of work OTU or the backup wavelength signals that OTU exported are multiplexed into one the tunnel, and described Optical Demultiplexing unit is used for one road light signal is demultiplexed into the monochromatic wavelength signals of multichannel and passes to corresponding work OTU or backup OTU.
Described protective device, wherein, described wavelength selectivity interleaver adopt the Wavelength-independent coupler to substitute to finish to described backup wavelength signals and other wavelength signals close the road or with described light signal shunt.
Described protective device, wherein, described backup OTU is tunable wave length OTU, described tunable wave length backup OTU is used for and will backs up the wavelength tuning of OTU to the pairing wavelength of fail operation OTU.
A kind of OTU share protect device comprises professional switch unit, backup OTU, optical multiplex unit/Optical Demultiplexing unit and light signal routing unit, and wherein: described backup OTU is used to finish the mutual conversion between business information and the wavelength signals; Described professional switch unit be used for work OTU when breaking down with fail operation OTU institute loaded service information switching to backing up OTU, or the described backup business information that OTU exported is switched to corresponding service side processing unit; Described optical multiplex unit is used for a plurality of work OTU or the backup wavelength signals that OTU exported are multiplexed into one the tunnel; Described Optical Demultiplexing unit is used for one road light signal is demultiplexed into the monochromatic wavelength signals of multichannel and passes to corresponding work OTU or backup OTU; Described light signal routing unit is used to finish switching the described backup backup wavelength signals that OTU changed.
Described protective device, wherein, described light signal routing unit comprises array of photoswitch or wavelength selectivity intersects.
Described protective device further comprises: deciliter unit, road, described backup OTU finishes protection to the work OTU of at least two different directions by deciliter unit, road.
Described protective device, wherein, unit, described deciliter road is light deciliter unit, road, electricity deciliter unit, road, light electric combiner unit or photosynthetic road electricity branching unit along separate routes.
Described protective device, wherein, unit, described deciliter road is made up of optical switch, coupler, electric switch, electric coupling.
A kind of OTU shared protection system, wherein, at least one node adopts a kind of share protect device, and described share protect device comprises professional switch unit, backup OTU, wavelength selectivity interleaver; Wherein: described professional switch unit is used for fail operation OTU institute loaded service information switching to backing up OTU, or the described backup business information that OTU exported is switched to corresponding service side processing unit; Described backup OTU is used to finish the mutual conversion between described business information and the wavelength signals; Described wavelength selectivity interleaver is used for the described backup backup wavelength signals that OTU changed and other wavelength signals are merged into one the tunnel and send to next website, or described backup wavelength signals is separated and sent to the backup OTU of correspondence from other wavelength signals.
Described protection system, wherein, described node adopts the Wavelength-independent coupler to substitute the road of closing of finishing described backup wavelength signals and other wavelength signals at the described wavelength selectivity interleaver of sending direction.
Described protection system, wherein, the employed protective device of described node further comprises a deciliter unit, road; The described backup backup wavelength signals that OTU changed is finished protection to the work OTU of at least two different directions by unit, described deciliter road.
Described protection system; wherein; the employed protective device of described node also comprises optical multiplex unit/Optical Demultiplexing unit; described optical multiplex unit is used for a plurality of work OTU or the backup wavelength signals that OTU exported are multiplexed into one the tunnel, and described Optical Demultiplexing unit demultiplexes into one road light signal monochromatic wavelength signals of multichannel and passes to corresponding work OTU or backup OTU.
Described protection system, wherein, described wavelength selectivity interleaver adopt the Wavelength-independent coupler to substitute to finish to described backup wavelength signals and other wavelength signals close the road or with described light signal shunt.
Described protection system, wherein, described backup OTU supports tunable wave length, when certain work OTU fault, the wavelength tuning of backup OTU is arrived the pairing wavelength of OTU of fault.
A kind of OTU shared protection system, wherein, its at least one node adopts a kind of share protect device, described share protect device comprises professional switch unit, backup OTU, optical multiplex unit/Optical Demultiplexing unit and light signal routing unit, and wherein: described backup OTU is used to finish the mutual conversion between business information and the wavelength signals; Described professional switch unit be used for work OTU when breaking down with fail operation OTU institute loaded service information switching to backing up OTU, or the described backup business information that OTU exported is switched to corresponding service side processing unit; Described optical multiplex unit is used for a plurality of work OTU or the backup wavelength signals that OTU exported are multiplexed into one the tunnel; Described Optical Demultiplexing unit is used for one road light signal is demultiplexed into the monochromatic wavelength signals of multichannel and passes to corresponding work OTU or backup OTU; Described light signal routing unit is used to finish switching the described backup backup wavelength signals that OTU changed.
Described protection system, wherein, described light signal routing unit comprises array of photoswitch or wavelength selectivity intersects.
Described protection system further comprises: deciliter unit, road, described backup OTU finishes protection to the work OTU of at least two different directions by deciliter unit, road.
Described protection system, wherein, unit, described deciliter road is light deciliter unit, road, electricity deciliter unit, road, light electric combiner unit or photosynthetic road electricity branching unit along separate routes.
Described protection system, wherein, unit, described deciliter road is made up of optical switch, coupler, electric switch, electric coupling.
Adopt such scheme; the present invention is when realizing the OTU protection; allow same website a plurality of with destination node and non-with destination node work OTU can share same backup OTU; thereby reduced the configuration quantity of back-up job OTU; reduced the system applies cost; and reduced the shared wavelength channel number of back-up job OTU, promoted the wavelength utilization ratio of system.The present invention also provides attainable OTU share protect device and OTU system.
Description of drawings
Fig. 1 is the N:M protection schematic diagram of prior art;
Fig. 2 is the schematic flow sheet of the inventive method;
Fig. 3 is first embodiment schematic diagram of apparatus of the present invention;
Fig. 4 is second embodiment schematic diagram of apparatus of the present invention;
Fig. 5 is the 3rd the embodiment schematic diagram of apparatus of the present invention;
Fig. 6 is the 4th the embodiment schematic diagram of apparatus of the present invention;
Fig. 7 is the 5th the embodiment schematic diagram of apparatus of the present invention;
Fig. 8 is the 6th the embodiment schematic diagram of apparatus of the present invention;
Fig. 9 is a light signal routing unit internal structure schematic diagram of the present invention;
Figure 10 is another light signal routing unit internal structure schematic diagram of the present invention;
Figure 11 is a professional switch unit schematic diagram of the present invention;
Figure 12 is the Another Application schematic diagram of the 5th embodiment of the present invention;
Figure 13 is the application schematic diagram of the present invention in the chain network.
Embodiment
Below preferred embodiment of the present invention is described in detail.The invention provides a kind of OTU share protect method, allow that same website is a plurality of can share same backup OTU with destination node and non-work OTU with destination node, thereby significantly reduce the configuration quantity of backup OTU.Based on described method, the present invention has provided attainable protective device and application system simultaneously.The inventive method comprises two step: A, fault OTU institute loaded service signal is switched to backup OTU as shown in Figure 2; B, the described backup backup wavelength signals that OTU changed is switched destination node to described service signal.The inventive method further comprises step: finish termination to described backup wavelength signals in destination node, and further service signal is switched to corresponding service side processing unit.Wherein, of the present invention switching can be to finish switching the described backup backup wavelength signals that OTU changed by the light signal routing unit; Wherein, the light signal routing unit comprises array of photoswitch, wavelength selectivity intersects.Method of the present invention, wherein, described service signal is switched and is comprised switching of optical service signal, electric industry affair signal or data service signal.Wherein, described optical service signal is switched and is adopted optical switch or optical cross-matrix to finish.Described electric industry affair signal is switched and is adopted electric space division cross matrix or electric cross-interaction matrix of time division to finish.Described data are switched and are adopted the data cross matrix to finish.
At source node, a plurality of work OTU are arranged, these work OTU institute loaded service has identical destination node, or has destination node inequality.After some work OTU break down, by the optical switch of client's side or the switching device shifter of other type, this work OTU institute loaded service signal is switched to backup OTU, finish the wavelength Conversion of described service signal by backup OTU; Or when backup OTU finishes the wavelength Conversion of described service signal, carry out some necessary traffic overhead by OTU according to service protocol and handle and professional encapsulation process.So far, finish steps A of the present invention.
Below describe step B of the present invention in detail.The described backup backup wavelength signals that OTU changed is switched destination node to described service signal.Described switch be included in that source node is set out on a journey, road under intermediate node break-through and the destination node; The wavelength signals that the described backup backup wavelength signals that OTU changed institute is changed with fail operation OTU through the path identical through the path.The wavelength signals of described backup OTU is accomplished to the multiplexing of circuit optical multiplexing section signal by a series of processing procedures, and described processing procedure comprises the multiplexing of light signal.Or back up the wavelength that OTU uses pre-assigned fixed-direction, therefore do not need travel direction to select.Described backup wavelength signals is in transport process, during through intermediate node, intermediate node is crossed this node with the break-through of described backup wavelength signals, described intermediate node be this wavelength signals process node but be not the pairing destination node of this wavelength institute bearer service, the performed action of signal about described break-through is meant not in this locality, the process of described break-through comprises demultiplexing, break-through and the multiplex process of optical wavelength signal, or the break-through process is only arranged.Through behind several intermediate nodes, also can be not pass through any intermediate node, described backup wavelength signals arrives the destination node of its bearer service correspondence, so far finishes the step B of the inventive method.Wherein, destination node can be selected the following road of described backup wavelength signals, and certain signal is represented by demultiplexing in described down road, and in this locality abandoned process.
After the step B, described backup wavelength signals is terminated in destination node, extracts service signal wherein, and service signal is switched to corresponding service side processing unit, promptly gives described client's side apparatus by the corresponding service port, finishes professional protection.Described backup wavelength signals termination is that the backup OTU by destination node finishes, and the service signal that extracts from described backup wavelength signals is finished professional switching by the switching services matrix, switches to described corresponding service side processing unit; Or directly described backup wavelength signals is directly switched to former work OTU at the pairing OTU of destination node, directly finish professional finalization process process by original destination node OTU.Concrete scheme is as follows.
Scheme 1a, for the tunable backup of node medium wavelength OTU, method of the present invention is at a node at least one backup wavelength conversion unit, the tunable wave length of described backup wavelength conversion unit to be set; Steps A also comprises step: C before, described backup wavelength conversion unit is tuned to the employed wavelength of fault wavelength conversion unit its output wavelength consistent.
Scheme 1b, for the fixing backup OTU of node medium wavelength, method of the present invention is, at a node at least one backup wavelength conversion unit is set, the wavelength of described backup wavelength conversion unit is fixed; Steps A also comprises step: D, after breaking down in the source node working cell, the backup wavelength channel that described intermediate node is opened the break-through port is finished the break-through to described backup wavelength signals.Can be implemented in intermediate node among the step B like this and the break-through of described backup wavelength signals be crossed the function of this node.
Scheme 2, use the backup wavelength conversion unit to finish the termination of described backup wavelength signals, and the service signal that further will extract from described backup wavelength signals is switched to corresponding service side processing unit in destination node.Method of the present invention is at a node at least one backup wavelength conversion unit, the tunable wave length of described backup wavelength conversion unit to be set; Steps A also comprises step: E before, the backup wavelength conversion unit is adjusted to a fixing extra wavelength with its wavelength; Steps A also comprises step: F, after breaking down in the source node working cell, the backup wavelength channel that described intermediate node is opened the break-through port is finished the break-through to described backup wavelength signals.Can be implemented in intermediate node among the step B like this and the break-through of described backup wavelength signals be crossed the function of this node.
A kind of OTU share protect device below in conjunction with based on the inventive method is elaborated to the inventive method.As shown in Figure 3, the invention provides a kind of OTU share protect device, it comprises professional switch unit, backup OTU, wavelength selectivity interleaver (WSS, WavelengthSelectvie Switching), wherein: described professional switch unit is used for fail operation OTU institute loaded service information switching to backing up OTU, or the described backup business information that OTU exported is switched to corresponding service side processing unit; Described backup OTU is used to finish the mutual conversion between described business information and the wavelength signals; Described WSS is used for the described backup backup wavelength signals that OTU changed and other wavelength signals are merged into one the tunnel and send to next website, or described backup wavelength signals is separated and sent to the backup OTU of correspondence from other wavelength signals.Wherein, the described WSS of sending direction adopts Wavelength-independent coupler (VAC, Variable Attenuator and Coupler) to substitute the road of closing of finishing described backup wavelength signals and other wavelength signals.
In protective device of the present invention, adopted WSS; common have 1 * 4,1 * 9 etc.; the function of WSS is that the different wave length composition in one road light signal is resolved into the N road diverse light signal of composition each other, or the different components in the light signal of N road is combined into one road light signal.Adopt VAC to substitute the described WSS of sending direction, the identical multipath light signal of light signal merit demultiplexing composition can be merged into multipath light signal one road light signal yet with not doing any reduction.Adopted VAC in the protective device, then backup OTU does not send any light signal when operate as normal, avoids producing the wavelength conflict.
As shown in Figure 3, all OTU directly link to each other with WSS, VAC.During operate as normal, no matter back up OTU wavelength-tunable or non-adjustable, whether use extra wavelength resource node, the not luminous or WSS1 of backup OTU0 selects to close the port that links to each other with OTU0 with WSS2, avoids backing up the light signal and other wavelength signals generation interference that OTU sends.After certain work OTU breaks down, professional switch unit with this fault OTU institute loaded service information switching to backing up OTU, backup OTU finishes the mutual conversion between described business information and the wavelength signals, the backup backup wavelength signals that OTU changed is merged into one the tunnel by WSS and other wavelength signals, and via line outlet optical fiber sends 310 to next website.If protective device shown in the accompanying drawing 3 is the intermediate node of described optical wavelength signal; the backup wavelength signals arrives the VAC or the WSS of east orientation; east orientation VAC or WSS select this backup wavelength light signal westwards to VAC or WSS transmit; the west to VAC or WSS select should back up the wavelength light signal and continue to transmit to next website, so this backup wavelength light signal can continue to next node transmission 320.Need to prove: only showed the OTU equipment share protect of a direction in the accompanying drawing 3, suitable equally to the another one direction.
Be the trouble of avoiding explaining, below earlier uses the extra wavelength resource node of fixing to describe as example with backup OTU0.As shown in Figure 3, after the OTU4 of certain node broke down, professional switch unit at first switched to business backup OTU0, directly opens OTU0, and is multiplexing together to next website transmission by VAC or WSS afterwards; Wherein, if used WSS, need WSS to open the wavelength channel of corresponding port.On the backup wavelength channel, form resonance during for fear of operate as normal, at the beginning all intermediate nodes not break-through should the backup wavelength signals, therefore need open backup wavelength channel on the feedthrough path at intermediate node, be that the WSS2 of intermediate node opens the backup wavelength channel on the break-through port, if WSS has been used in outlet, then WSS3 also will open the backup wavelength channel of break-through port, to allow this backup wavelength channel be passed to downstream node.Because backup wavelength channel and the employed wavelength channel of trouble unit are inconsistent; therefore must use backup OTU unit to mention original work OTU unit in destination node and finish professional reception; therefore open and the backup wavelength channel that backs up OTU unit institute connectivity port by WSS2 in destination node; finish the termination and professional extraction of wavelength by backup OTU unit; give professional switch unit at last and finish professional switching, so far finish the whole protecting reversed process.
If backup OTU0 has used the tunable wave length module, then above-mentioned implementation has a great difference.Because but the employed wavelength of backup OTU0 operational failure OTU so can not carry out any operation in destination node and intermediate node, only need be finished following operation at source node.At first fault OTU institute loaded service is switched to backup OTU by professional switch unit, OTU finishes professional wavelength Conversion by backup, if the source node outlet side has used VAC, on transmit path, do not need to carry out any operational processes, only open backup OTU and be tuned to corresponding wavelength.If used WSS, then need west as shown in Figure 3 to open and the backup wavelength channel that backs up port that OTU connects, to allow the backup wavelength channel to the next node transmission to going out WSS at the source node outlet side.At receive direction, by the west of source node to go into wavelength that WSS received fault OTU switch to backup port that OTU connects, the while is finished the switching of business by professional switch unit, can realize that the protection of OTU is switched.
Switch to backup OTU if also will carry out the pairing OTU of fault OTU in destination node, then need east orientation go into WSS with the wavelength switching services of correspondence to the port that links to each other with backup OTU; To back up simultaneously light signal that OTU sends be tuned to the wavelength signals that sent of pairing work OTU; The east orientation that is connected with this backup OTU simultaneously goes out VAC or WSS also will open the corresponding wavelength passage, wherein, if that be connected with this backup OTU is VAC, do not need to carry out any operation, if that be connected with this backup OTU is WSS, just need to open the wavelength channel of corresponding port; Last professional switch unit will be carried out switching operation equally, corresponding work OTU institute of institute loaded service is switched to backing up the OTU service port get final product.
If east-west direction is wanted shared identical backup OTU; protective device shown in the accompanying drawing 3 further comprises a deciliter unit, road among the present invention, and the backup wavelength signals that described backup OTU is changed is by the protection of unit, described deciliter road to the work OTU of at least two different directions.Wherein, unit, described deciliter road is light deciliter unit, road, electricity deciliter unit, road, light electric combiner unit or photosynthetic road electricity branching unit along separate routes.Unit, described deciliter road is made up of optical switch, coupler, electric switch, electric coupling.The protective device of employing deciliter unit, road has wherein only adopted a backup OTU as shown in Figure 4, and described backup OTU is tunable wave length OTU, and described tunable wave length backup OTU is used for backing up the wavelength tuning of OTU to the pairing wavelength of fail operation OTU; Carry out routing by a deciliter unit, road then; by splitter finish the backup wavelength in east, the west to merit divide or routing process; close road or routing by what mixer was finished road signal under the East and West direction, thereby can protect the work OTU of thing both direction with identical backup OTU.Certainly, also can adopt a plurality of backup OTU that work OTU is protected in the practical application, wherein back up OTU and can adopt fixed wave length, finish termination described backup wavelength signals by the correspondence work OTU of destination node; Perhaps backing up OTU also can be tunable wave length OTU, used by destination node and back up the termination that OTU finishes described backup wavelength signals, and the service signal that further will extract from described backup wavelength signals is switched to described corresponding service side processing unit.
Protective device shown in the accompanying drawing 3 also comprises optical multiplex unit/Optical Demultiplexing unit among the present invention; Described optical multiplex unit is used for a plurality of work OTU or the backup wavelength signals that OTU exported are multiplexed into one the tunnel, and described Optical Demultiplexing unit is used for one road light signal is demultiplexed into the monochromatic wavelength signals of multichannel and passes to corresponding work OTU or backup OTU.The protective device that comprises optical multiplex unit/Optical Demultiplexing unit as shown in Figure 5; after certain work OTU breaks down; professional switch unit switches to certain backup OTU 510 with this fault OTU institute loaded service; after the backup backup wavelength signals that OTU took place process OADM or MUX are multiplexing; to WSS, the west should be backed up the wavelength light signal to WSS and be transmitted to next node to darcy.If the protective device shown in the accompanying drawing 6 is an intermediate node; then back up VAC or WSS that wavelength signals arrives east orientation; east orientation VAC or WSS select this backup wavelength light signal westwards to VAC or WSS transmit; the west to VAC or WSS select should back up the wavelength light signal and continue to transmit to next website, so this backup wavelength light signal can continue to next node transmission 520.
Described as shown in Figure 5 protective device, wherein, described WSS adopt the VAC of Wavelength-independent to substitute to finish to described backup wavelength signals and other wavelength signals close the road or with described light signal shunt.East orientation or west optical multiplexing section signal limitation always insert among WSS or the variable attenuation VAC (VAC, Variable Attenuator and Coupler).Because VAC and Wavelength-independent, it can also can be merged into multipath light signal one road light signal with the identical multipath light signal of light signal merit demultiplexing composition.VAC or WSS are with input optical signal demultiplexing signal, and wherein one road light signal directly links to each other with the VAC or the WSS in downstream.Because VAC itself and Wavelength-independent can't block light signal, so upstream and downstream has only a side to use VAC, other side use WSS, but upstream and downstream can be used WSS.Other one road signal of upstream VAC or WSS directly meets OADM or DMUX, and certainly, reciprocal VAC or WSS meet OADM or MUX.OADM, MUX, DMUX link to each other with work OTU, backup OTU.
If intermediate node uses VAC on input direction, the OADM that can predict our station will receive this backup wavelength signals, and corresponding backup OTU also will receive this signal, but can detect coming source node or passing through the signaling intermediate node of this wavelength signals by OTU, intermediate node is not switched professional switch unit, can guarantee that promptly corresponding backup wavelength signals can not be switched to following road port.In destination node; VAC that the backup wavelength signals is transfused to or WSS select to consign to local OADM or DMUX; finish the following road of backup wavelength signals; give termination and professional extraction that the backup wavelength signals is finished in backup OTU unit at last; finish and being connected of customer equipment by professional switch unit at last, so far finish the protection of service signal and switch.
Need to prove that Fig. 5 has only showed the west to OADM, the connected mode of east orientation OADM is similar to being connected of OADM with the west.At this moment; backup OTU can only protect the unit work OTU of a direction; if protect simultaneously east orientation and the west to work OTU; then need on backup OTU unit input and output wavelength light mouth, increase deciliter road unit consistent with protective device shown in Figure 4; by splitter finish the backup wavelength in east, the west to merit divide or routing process; and mixer finish road signal under the East and West direction close road or routing, thereby can protect the work OTU of thing both direction with identical backup OTU.
When protective device of the present invention adopts deciliter unit, road, tell about 1 backup OTU with 1: 8 form below and protect each 4 work of East and West direction OTU simultaneously.As shown in Figure 6, suppose the west break down to OTU4, then OTU4 institute loaded service is switched to backup OTU0, and the light signal that OTU0 sent is sent to W-OADM through a deciliter unit, road, and W-OADM also may be made up of MUX, DMUX certainly, if MUX/DMUX, then the light signal that OTU0 sent is transferred into W-MUX, with other west to wavelength signals close the road after, be sent to the west to WSS1, the west to WSS1 select wavelength channel open, to next node transmission 610.Suppose that next node is not a destination node, the VAC2 that is east orientation at this moment receives the backup wavelength signals that OTU0 sends, VAC2 is just simply with wavelength signals merit demultiplexing, wherein one the tunnel be sent to the west of this intermediate node to WSS1, WSS1 select to continue break-through should backup wavelength signals, forwards continuing.After the backup wavelength light signal of VAC2 after middle merit is divided can pass through the demultiplexing of east orientation E-OADM or E-DMUX, be sent to the OTU0 of intermediate node, even OTU0 receives this backup wavelength signals, but by the signaling of being transmitted between address information in the detection backup wavelength signals or the node, OTU0 knows that institute's loaded information is not that this node is required in this backup wavelength signals, therefore can not take any action, the professional switch unit of corresponding intermediate node can not carried out any action yet, professional wrong connection 620 therefore can not occur.So circulation; be delivered to destination node to backing up wavelength signals, the VAC2 of destination node still selects the merit branch, but this moment west to WSS1 can close corresponding backup wavelength channel; avoid this backup wavelength signals to hold over circuit wavelength resource node, influence the OTU share protect of next link.And local E-OADM or E-DMUX can give road under this backup wavelength signals corresponding backup OTU0, finish the termination and the professional proposition of backup wavelength signals, finish professional switching via professional switch unit at last, so far finish the protection 630 of OTU.The reverse traffic transmittance process of source node and destination node similarly repeats no more.It is emphasized that a deciliter unit, road shown in Figure 6 can be integrated in OTU0 inside, the OTU that OTU0 is also just received by the single-shot list is altered to the OTU unit of dual transmitting and receiving.
When protective device of the present invention adopts deciliter unit, road, and when adopting the backup OTU of tunable wave length to carry out the OTU share protect, the backup OTU that tells about 1 tunable wave length with 1: 8 form protects each 4 work of East and West direction OTU simultaneously below.As shown in Figure 7, suppose the OTU4 of source node and the OTU8 interconnection of destination node.When OTU4 breaks down, this moment, the OTU loaded service was switched to backup OTU0 by professional switch unit, OTU0 is the backup OTU of tunable wave length, therefore OTU0 selects the output wavelength of oneself is tuned to the employed consistent wavelength with OTU4, and the light signal that self is sent is sent to VAC1 or WSS3 710 behind deciliter unit, road afterwards.Insensitive to input wavelength because of VAC1, so the backup wavelength signals sent of OTU0 can directly transmit to next website.If use WSS3, then when operate as normal, WSS3 to port that W-OADM or W-MUX link to each other on the wavelength that sent of open OTU4, but after OTU4 breaks down, WSS3 make into deciliter port that the unit, road links to each other on open the wavelength that fault OTU is sent, be sent to next node to select to back up the wavelength that OTU0 sent, at intermediate node, because OTU4 wavelength originally is exactly that this node is crossed in break-through, so intermediate node can not carried out any action 720.And,, give the OTU8 of destination node at last because the wavelength signals that OTU4 sends directly passes to E-OADM or E-DMUX through the WSS2 of destination node to destination node, finish the termination and the professional following road 730 of wavelength signals by OTU8.And the backup wavelength signals of being sent for source node OTU0, because adopted the light signal of the work consistent wavelength that OTU4 sent, so aftermentioned intermediate node and destination node can not carried out any action.In the reverse traffic transmittance process, by the WSS1 of the node at fault OTU place with the original pairing reception wavelength of OTU4 switch to the backup port that OTU0 was connected, thereby should select the wavelength of receipts to switch to backup OTU0 fault OTU4, this moment, implementation remained unidirectional switching, only need the fault side gusset to carry out, concrete implementation does not repeat them here.
This shows; the OTU that adopts tunable wave length is as backup OTU; not only can improve the wavelength utilization ratio; and when carrying out the OTU equipment protection; only need the source node end to carry out change action; the aftermentioned node need not to carry out any action, has further reduced the difficulty of implementation that protection is switched, and has promoted the execution speed that protection is switched.Certainly, for accompanying drawing 7, also can select to back up OTU0 in destination node as receiving element, the WSS2 that only the needs the purpose of opening node corresponding backup wavelength channel in the port that links to each other with the backup OTU0 of this destination node, the backup wavelength channel can be switched to OTU0, simultaneously in the professional switch unit also with the switching services of OTU0 to the corresponding service passage, can finish OTU0 substituting to OTU8.But in this process, still have only source node and the switching action of destination node participation protective, need not intermediate node and participate in any operation.
Similar with accompanying drawing 6, deciliter unit, road shown in the accompanying drawing 7 can be integrated among the backup OTU equally, back up OTU this moment and be altered to dual transmitting and receiving OTU unit by original single-shot list receipts OTU unit, at this moment, deciliter unit, road not only can use VAC, filter to realize, even can finish with the power splitter of the signal of telecommunication or the selector switch of the signal of telecommunication.Need to prove that if use VAC in Fig. 7, then operate as normal time backup OTU does not send any light signal, avoids producing the wavelength conflict.
Another kind of OTU share protect device below in conjunction with based on the inventive method is elaborated to the inventive method.As shown in Figure 8, the invention provides a kind of OTU share protect device, comprise professional switch unit, backup OTU, optical multiplex unit/Optical Demultiplexing unit and light signal routing unit, wherein: described backup OTU is used to finish the mutual conversion between described business information and the wavelength signals; Described professional switch unit be used for work OTU when breaking down with fail operation OTU institute loaded service information switching to backing up OTU, or the described backup business information that OTU exported is switched to corresponding service side processing unit; Described optical multiplex unit is used for a plurality of work OTU or the backup wavelength signals that OTU exported are multiplexed into one the tunnel; Described Optical Demultiplexing unit is used for one road light signal is demultiplexed into the monochromatic wavelength signals of multichannel and passes to corresponding work OTU or backup OTU; Described light signal routing unit is used to finish switching the described backup backup wavelength signals that OTU changed.
After certain work OTU breaks down, professional switch unit switches to backup OTU with this fault OTU institute loaded service, backup OTU finishes processing and the wavelength Conversion to business, the backup optical wavelength signal that OTU sent is given corresponding OADM (Optical Add/DropMultiplxer through the light signal routing unit, optical add/drop multiplexer) unit or MUX/DMUX (Multiplexer/Demultiplexer, multiplexer/demultiplexer) unit, last via line outlet optical fiber sends 810 to a website, and described OADM unit allows the different wave length signal of different optical-fiber networks multiplexing at different place bifurcateds.If next website is not the pairing destination node website of this backup wavelength institute bearer service, then at this intermediate node, professional behind road under OADM or the DMUX, continue to give the light signal routing unit, in the light signal routing unit, this backup wavelength signals is done punch-through process, promptly this backup wavelength signals is passed the light signal routing unit, give OADM or MUX unit, continue to finish the road of closing of this wavelength signals and other wavelength signals and feedthrough signal and handle, continue to transmit 820 to next website.Whole process lasts till that this backup wavelength signals arrives its pairing destination node.In destination node; this the backup wavelength signals by road under the OADM after; give the light signal routing unit; the light signal routing unit will back up wavelength signals and give corresponding backup OTU unit; the termination of backup OTU unit backup wavelength signals; extract the corresponding service signal, finish the connection 810 of service signal by the matrix of switching of professional switch unit at last, so far finish whole OTU equipment share protect process to customer equipment.Need to prove: only showed the OTU equipment share protect of a direction in the accompanying drawing 8, suitable equally to the another one direction.
For further explaining entire work process, the internal structure to the light signal routing unit describes below.Light signal routing unit of the present invention comprises array of photoswitch or wavelength selectivity intersects.Wherein array of photoswitch comprises four 1 * 2 optical switch as shown in Figure 9 in the light signal routing unit, and each optical switch can be finished the selection or one tunnel input light of two-way input light and can select to output in one tunnel output.When its during as the wavelength routing apparatus of source node, suppose that the defeated light inlet of backup OTU is upwards entered by the west, then optical switch 3 selects the west upwards, outputs on the circuit from the west to the Out port will back up the wavelength light signal.At intermediate node, optical switch 4 selects the light signal of east orientation In mouths to optical switch 3 direction transmission, and optical switch 3 continues the west and links to each other with optical switch 4 to Out, and then the east orientation In mouth light signal of coming in will be sent to the west to the Out port, realization break-through function.In destination node, the light signal that east orientation In mouth is come in is chosen as under the east orientation by optical switch 4, thereby can realize the following road of this backup wavelength signals in this locality.The back transfer process and the forward process of backup wavelength light signal are similar, do not repeat them here.
If east-west direction is wanted shared identical backup OTU, then above-mentioned light signal routing unit structure changes in practical application of the present invention to some extent.The present invention further comprises: signal deciliter unit, road, described backup OTU conversion is finished protection to the work OTU of at least two different directions by deciliter unit, road.Unit, described deciliter road is light deciliter unit, road, electricity deciliter unit, road, light electric combiner unit or photosynthetic road electricity branching unit along separate routes; Unit, described deciliter road is made up of optical switch, coupler, electric switch, electric coupling.As shown in Figure 10, the backup wavelength signals set out on a journey through behind the splitter with east orientation on, the west upwards links to each other, and under the east orientation, western downward light signal links to each other with following road behind mixer.At source node; no matter east orientation still breaks down to work OTU in the west; the backup wavelength signals of backup OTU input and output can be carried out routing by four optical switches in the light signal routing unit after through mixer and splitter, with protection east orientation or west to the OTU unit.Mixer that accompanying drawing 10 is showed and splitter can be VAC, also can be optical switches, and the both can finish the function of splitter, mixer.Accompanying drawing 10 described light signal routing units repeat no more at the similar accompanying drawing 9 of processing procedure of intermediate node.Splitter described in the accompanying drawing 10, mixer can directly be integrated on the backup OTU, realize two two functions of receiving of backup OTU, and this moment, splitter and mixer can be optical switch, coupler, electric switch, electric coupling etc.The light signal routing unit that above-mentioned accompanying drawing 9, accompanying drawing 10 are showed only comprises the pairing wavelength routing apparatus of one tunnel backup OTU, if a plurality of backup units are arranged, just needs above-mentioned multichannel wavelength routing apparatus.
The function of the switching services of the inventive method can be realized by professional switch unit, for further setting forth the present invention, below professional switch unit is explained in detail.As shown in Figure 11, comprise N VAC in the professional switch unit, VAC is divided into two-way with the light signal that customer equipment comes, and one the tunnel directly is access to work OTU, and other one the tunnel is linked in the optical switch of 1 * N, and the opposite side gateway of optical switch links to each other with backup OTU.After OTU broke down, by 1 * N optical switch, the client signal that fault OTU can be carried was switched to backup OTU in work, and during for a plurality of backup OTU cell operation, 1 * N optical switch recited above often replaces to the optical switch of N * (N+M).In fact; professional switch unit also has more implementation; such as using optical cross-matrix; for example can directly use the optical cross-matrix of M * (N+M); M customer equipment gateway promptly arranged; M+N work and protection gateway are arranged, and the client signal that the optical cross-matrix by M * (N+M) is carried fault OTU is switched to backup OTU and is finished equipment protection.
The present invention also can finish similar function by signal of telecommunication cross unit, for example electric space division cross matrix, electric cross-interaction matrix of time division etc.As shown in Figure 12, professional switch unit is a signal of telecommunication cross unit, B﹠amp; W is achromaticity photoelectricity, electrooptic conversion module.OTU had both finished the conversion of colourama wavelength signals to the signal of telecommunication, also converted the electrical signal to the colourama signal simultaneously, and B﹠amp; The conversion of the achromaticity light signal and the signal of telecommunication, B﹠amp are only finished in the W unit; W is connected with client's side apparatus, and after a certain road OTU broke down, professional switch unit was with the corresponding B﹠amp of this road OTU; The signal of telecommunication that W inserted is switched to backup OTU, and subsequent processes and previously described process are identical, do not repeat them here.Other data are switched and are adopted the specific implementation method of data cross matrix similar with it, do not repeat them here.
On this basis, the present invention also provides a kind of OTU shared protection system, and wherein, at least one node adopts a kind of share protect device, described share protect device as shown in Figure 3, its comprise professional switch unit, the backup OTU, WSS; Wherein: described professional switch unit is used for fail operation OTU institute loaded service information switching to backing up OTU, or the described backup business information that OTU exported is switched to corresponding service side processing unit; Described backup OTU is used to finish the mutual conversion between described business information and the wavelength signals; Described WSS is used for the described backup backup wavelength signals that OTU changed and other wavelength signals are merged into one the tunnel and send to next website, or described backup wavelength signals is separated and sent to the backup OTU of correspondence from other wavelength signals.Described share protect device as shown in Figure 3 specifically as previously mentioned.
The share protect device that protection system of the present invention adopted, as shown in Figure 3, described node adopts Wavelength-independent VAC to substitute the road of closing of finishing described backup wavelength signals and other wavelength signals at the described WSS of sending direction, specifically as previously mentioned.
The share protect device that protection system of the present invention adopted, as shown in Figure 4, the employed protective device of described node further comprises a deciliter unit, road; The described backup backup wavelength signals that OTU changed is by finishing the protection to the work OTU of at least two different directions, specifically as previously mentioned by unit, described deciliter road.
The share protect device that protection system of the present invention adopted, as shown in Figure 5, the employed protective device of described node also comprises optical multiplex unit/Optical Demultiplexing unit, described optical multiplex unit is used for a plurality of work OTU or the backup wavelength signals that OTU exported are multiplexed into one the tunnel, and described Optical Demultiplexing unit demultiplexes into one road light signal monochromatic wavelength signals of multichannel and passes to corresponding work OTU or backup OTU; Described WSS adopt Wavelength-independent VAC to substitute to finish to described backup wavelength signals and other wavelength signals close the road or with described light signal shunt, specifically as previously mentioned.
The share protect device that protection system of the present invention adopted; shown in accompanying drawing 6 or accompanying drawing 7, described backup OTU supports tunable wave length, when certain work OTU fault; the OTU pairing wavelength of the wavelength tuning of OTU to fault will be backed up, specifically as previously mentioned.
A kind of OTU shared protection system, wherein, its at least one node adopts a kind of share protect device, described share protect device as shown in Figure 8, it comprises professional switch unit, backup OTU, optical multiplex unit/Optical Demultiplexing unit and light signal routing unit, and wherein: described backup OTU is used to finish the mutual conversion between described business information and the wavelength signals; Described professional switch unit be used for work OTU when breaking down with fail operation OTU institute loaded service information switching to backing up OTU, or the described backup business information that OTU exported is switched to corresponding service side processing unit; Described optical multiplex unit is used for a plurality of work OTU or the backup wavelength signals that OTU exported are multiplexed into one the tunnel; Described Optical Demultiplexing unit is used for one road light signal is demultiplexed into the monochromatic wavelength signals of multichannel and passes to corresponding work OTU or backup OTU; Described light signal routing unit is used to finish switching the described backup backup wavelength signals that OTU changed.Described share protect device as shown in Figure 8 specifically as previously mentioned.
The share protect device that protection system of the present invention adopted, wherein, described light signal routing unit comprises array of photoswitch or wavelength selectivity intersects, as shown in Figure 9, specifically as previously mentioned.
Protection system of the present invention as shown in Figure 10, further comprises signal deciliter unit, road, and described backup OTU finishes protection to the work OTU of at least two different directions by deciliter unit, road.Wherein, unit, described deciliter road is light deciliter unit, road, electricity deciliter unit, road, light electric combiner unit or photosynthetic road electricity branching unit along separate routes.Wherein, unit, described deciliter road is made up of optical switch, coupler, electric switch, electric coupling.Splitter described in the accompanying drawing 10, mixer can directly be integrated on the backup OTU, realize two two functions of receiving of backup OTU, specifically as previously mentioned.
Protective device provided by the invention is applicable in chain, the ring-like and more complicated Mesh topology, forms protection system provided by the present invention.Applicable cases with the chain topology is that example describes below.
As shown in Figure 13, suppose that A, B, C, D, five points of E constitute a chain network.For for purpose of brevity, temporary transient hypothesis wherein has only B and D, E to have simultaneously that a wavelength is professional to be connected.The principle according to the present invention; the B point does not need to be the professional configuration backup OTU unit separately of the wavelength of B to D, B to E; but can protect the OTU unit of B for the identical backup OTU unit of the wavelength business configuration of B to D, B to E simultaneously to D, B to E; certainly; all need configuration backup OTU unit at D, E node; this backup OTU unit not only can be as the protection of B to D, B to the work OTU of E, can be used as the protection that D, E node arrive the OTU of other node simultaneously.Other wavelength is professional to be connected if other node A, C also exist, and then also needs configuration backup OTU unit, and the protection that corresponding OTU unit can be used as the wavelength business of a plurality of various objectives nodes connects.
When the OTU by B to D of B node breaks down, the B node with the switching services of this fault OTU to backing up OTU, handle by the wavelength heavy-route of B, C, three nodes of D former back, wavelength road under the D node with backup OTU, and select the backup OTU termination or the pairing work OTU termination of former B node failure OTU of D node by the D node, finally finish professional switching.And when the OTU by B to E of B node breaks down, the B node will this fault OTU institute loaded service be switched to backup OTU, handle by the wavelength heavy-route of B, C, D, four nodes of E former back, wavelength road under the E node with backup OTU, in this process, the D node need back up the wavelength break-through that OTU sent with the B node, rather than above-mentioned road down.D node under a kind of situation in process that the E node is carried out in this process and front is similar, repeats no more.Other use the system of protective device of the present invention, as ring-like and more complicated Mesh topology similarly.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (24)
1. a wavelength conversion unit share protect device comprises professional switch unit, backup wavelength conversion unit, wavelength selectivity interleaver, it is characterized in that;
Described professional switch unit is used for fail operation wavelength conversion unit institute loaded service information switching to backing up wavelength conversion unit, or the business information that described backup wavelength conversion unit is exported is switched to corresponding service side processing unit;
Described backup wavelength conversion unit is used to finish the mutual conversion between described business information and the wavelength signals;
Described wavelength selectivity interleaver is used for backup wavelength signals that described backup wavelength conversion unit is changed and other wavelength signals and is merged into one the tunnel and send to next website, or described backup wavelength signals is separated and send to corresponding backup wavelength conversion unit from other wavelength signals.
2. protective device according to claim 1 is characterized in that, the described wavelength selectivity interleaver of sending direction adopts the Wavelength-independent coupler to substitute the road of closing of finishing described backup wavelength signals and other wavelength signals.
3. protective device according to claim 1 further comprises a deciliter unit, road, and the backup wavelength signals that described backup wavelength conversion unit is changed provides protection by unit, described deciliter road to the operation wavelength converting unit of at least two different directions.
4. protective device according to claim 3 is characterized in that, unit, described deciliter road is light deciliter unit, road, electricity deciliter unit, road, light electric combiner unit or photosynthetic road electricity branching unit along separate routes.
5. protective device according to claim 4 is characterized in that, unit, described deciliter road is made up of optical switch, coupler, electric switch, electric coupling.
6. protective device according to claim 1 is characterized in that, it also comprises optical multiplex unit/Optical Demultiplexing unit; Described optical multiplex unit is used for a plurality of operation wavelength converting units or the wavelength signals exported of backup wavelength conversion unit are multiplexed into one the tunnel, and described Optical Demultiplexing unit is used for one road light signal is demultiplexed into the monochromatic wavelength signals of multichannel and passes to corresponding operation wavelength converting unit or the backup wavelength conversion unit.
7. protective device according to claim 6 is characterized in that, described wavelength selectivity interleaver adopt the Wavelength-independent coupler to substitute to finish to described backup wavelength signals and other wavelength signals close the road or with described light signal shunt.
8. according to claim 1 or 2 arbitrary described protective devices; it is characterized in that; described backup wavelength conversion unit is the tunable wave length wavelength conversion unit, and described tunable wave length backup wavelength conversion unit is used for and will backs up the wavelength tuning of wavelength conversion unit to the pairing wavelength of fail operation wavelength conversion unit.
9. a wavelength conversion unit share protect device comprises professional switch unit, backup wavelength conversion unit, optical multiplex unit/Optical Demultiplexing unit and light signal routing unit, it is characterized in that:
Described backup wavelength conversion unit is used to finish the mutual conversion between business information and the wavelength signals;
Described professional switch unit is used for when the operation wavelength converting unit breaks down fail operation wavelength conversion unit institute loaded service information switching to backing up wavelength conversion unit, or the business information that described backup wavelength conversion unit is exported is switched to corresponding service side processing unit;
Described optical multiplex unit is used for a plurality of operation wavelength converting units or the wavelength signals exported of backup wavelength conversion unit are multiplexed into one the tunnel;
Described Optical Demultiplexing unit is used for one road light signal is demultiplexed into the monochromatic wavelength signals of multichannel and passes to corresponding operation wavelength converting unit or the backup wavelength conversion unit;
Described light signal routing unit is used to finish switching of backup wavelength signals that described backup wavelength conversion unit is changed.
10. protective device according to claim 9 is characterized in that, described light signal routing unit comprises array of photoswitch or wavelength selectivity intersects.
11. protective device according to claim 9 further comprises: deciliter unit, road, described backup wavelength conversion unit is finished protection to the operation wavelength converting unit of at least two different directions by deciliter unit, road.
12. protective device according to claim 11 is characterized in that, unit, described deciliter road is light deciliter unit, road, electricity deciliter unit, road, light electric combiner unit or photosynthetic road electricity branching unit along separate routes.
13. protective device according to claim 12 is characterized in that, unit, described deciliter road is made up of optical switch, coupler, electric switch, electric coupling.
14. a wavelength conversion unit shared protection system is characterized in that, at least one node adopts a kind of share protect device, and described share protect device comprises professional switch unit, backup wavelength conversion unit, wavelength selectivity interleaver; Wherein:
Described professional switch unit is used for fail operation wavelength conversion unit institute loaded service information switching to backing up wavelength conversion unit, or the business information that described backup wavelength conversion unit is exported is switched to corresponding service side processing unit;
Described backup wavelength conversion unit is used to finish the mutual conversion between described business information and the wavelength signals;
Described wavelength selectivity interleaver is used for backup wavelength signals that described backup wavelength conversion unit is changed and other wavelength signals and is merged into one the tunnel and send to next website, or described backup wavelength signals is separated and send to corresponding backup wavelength conversion unit from other wavelength signals.
15. protection system according to claim 14 is characterized in that, described node adopts the Wavelength-independent coupler to substitute the road of closing of finishing described backup wavelength signals and other wavelength signals at the described wavelength selectivity interleaver of sending direction.
16. protection system according to claim 14 is characterized in that, the employed protective device of described node further comprises a deciliter unit, road; The backup wavelength signals that described backup wavelength conversion unit is changed is finished protection to the operation wavelength converting unit of at least two different directions by unit, described deciliter road.
17. protection system according to claim 14; it is characterized in that; the employed protective device of described node also comprises optical multiplex unit/Optical Demultiplexing unit; described optical multiplex unit is used for a plurality of operation wavelength converting units or the wavelength signals exported of backup wavelength conversion unit are multiplexed into one the tunnel, and described Optical Demultiplexing unit demultiplexes into one road light signal monochromatic wavelength signals of multichannel and passes to corresponding operation wavelength converting unit or the backup wavelength conversion unit.
18. protection system according to claim 17 is characterized in that, described wavelength selectivity interleaver adopt the Wavelength-independent coupler to substitute to finish to described backup wavelength signals and other wavelength signals close the road or with described light signal shunt.
19. according to claim 14 or 15 arbitrary described protection systems; it is characterized in that; described backup wavelength conversion unit is supported tunable wave length, when certain operation wavelength converting unit fault, the wavelength tuning of backup wavelength conversion unit is arrived the pairing wavelength of wavelength conversion unit of fault.
20. wavelength conversion unit shared protection system; it is characterized in that; its at least one node adopts a kind of share protect device, and described share protect device comprises professional switch unit, backup wavelength conversion unit, optical multiplex unit/Optical Demultiplexing unit and light signal routing unit, wherein:
Described backup wavelength conversion unit is used to finish the mutual conversion between business information and the wavelength signals;
Described professional switch unit is used for when the operation wavelength converting unit breaks down fail operation wavelength conversion unit institute loaded service information switching to backing up wavelength conversion unit, or the business information that described backup wavelength conversion unit is exported is switched to corresponding service side processing unit;
Described optical multiplex unit is used for a plurality of operation wavelength converting units or the wavelength signals exported of backup wavelength conversion unit are multiplexed into one the tunnel;
Described Optical Demultiplexing unit is used for one road light signal is demultiplexed into the monochromatic wavelength signals of multichannel and passes to corresponding operation wavelength converting unit or the backup wavelength conversion unit;
Described light signal routing unit is used to finish switching of backup wavelength signals that described backup wavelength conversion unit is changed.
21. protection system according to claim 20 is characterized in that, described light signal routing unit comprises array of photoswitch or wavelength selectivity intersects.
22. protection system according to claim 20 further comprises: deciliter unit, road, described backup wavelength conversion unit is finished protection to the operation wavelength converting unit of at least two different directions by deciliter unit, road.
23. protection system according to claim 22 is characterized in that, unit, described deciliter road is light deciliter unit, road, electricity deciliter unit, road, light electric combiner unit or photosynthetic road electricity branching unit along separate routes.
24. protection system according to claim 23 is characterized in that, unit, described deciliter road is made up of optical switch, coupler, electric switch, electric coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100600665A CN1859062B (en) | 2006-03-27 | 2006-03-27 | Protective method for sharing wave length conversion unit, realizing device and application system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100600665A CN1859062B (en) | 2006-03-27 | 2006-03-27 | Protective method for sharing wave length conversion unit, realizing device and application system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1859062A CN1859062A (en) | 2006-11-08 |
| CN1859062B true CN1859062B (en) | 2011-05-18 |
Family
ID=37297929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100600665A Active CN1859062B (en) | 2006-03-27 | 2006-03-27 | Protective method for sharing wave length conversion unit, realizing device and application system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1859062B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120087658A1 (en) * | 2010-10-12 | 2012-04-12 | Tyco Electronics Subsea Communications Llc | Wavelength Selective Switch Band Aggregator and Band Deaggregator and Systems and Methods Using Same |
| EP2648350B1 (en) * | 2010-11-29 | 2018-12-05 | Mitsubishi Electric Corporation | Wavelength-multiplexed optical transport system, transmitter device and receiver device |
| CN107959527B (en) * | 2016-10-18 | 2020-06-02 | 中国电信股份有限公司 | Reconfigurable optical add-drop multiplexer and optical path protection method |
| CN115378754A (en) * | 2021-05-21 | 2022-11-22 | 华为技术有限公司 | CAN communication redundancy method and communication device |
| CN115802208A (en) * | 2021-09-10 | 2023-03-14 | 中兴通讯股份有限公司 | Protection switching method, network manager, station and electronic equipment of optical transmission system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1490968A (en) * | 2002-10-15 | 2004-04-21 | 华为技术有限公司 | Light wavelength channel protecting method and apparatus for compact WDM system |
-
2006
- 2006-03-27 CN CN2006100600665A patent/CN1859062B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1490968A (en) * | 2002-10-15 | 2004-04-21 | 华为技术有限公司 | Light wavelength channel protecting method and apparatus for compact WDM system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1859062A (en) | 2006-11-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6657952B1 (en) | Ring network for sharing protection resource by working communication paths | |
| EP2051442B9 (en) | Method, system and apparatus for protecting wavelength division multiplex transmission | |
| US5663818A (en) | Optical concentrator and optical communication network using the same | |
| US20020197000A1 (en) | Optical cross-connect switch using programmable multiplexers/demultiplexers | |
| CN103748818B (en) | Equipment and method for optical-fiber network | |
| RU2394378C2 (en) | Method, device and system for collective protection of group of optical channels | |
| CN1859062B (en) | Protective method for sharing wave length conversion unit, realizing device and application system | |
| US6434288B1 (en) | Optical switching system | |
| US7715711B2 (en) | Wavelength selective switch design configurations for mesh light-trails | |
| JP2012075115A (en) | Node for optical communication network | |
| US20040218526A1 (en) | Bi-directional wavelength division multiplexing self-healing optical ring network | |
| CN100370700C (en) | Realizing method and device for optical path shared protection in wave division complex system | |
| US7302180B2 (en) | Dual homing for DWDM networks in fiber rings | |
| CN111988082B (en) | System and apparatus for optical communication | |
| WO2021120203A1 (en) | Submarine optical cable system | |
| JP4408806B2 (en) | Path protection method for WDM network and corresponding node | |
| JP2000004460A (en) | Optical communication node and optical communication network | |
| US6922530B1 (en) | Method and apparatus for optical channel switching in an optical add/drop multiplexer | |
| US20050129403A1 (en) | Method and system for communicating optical traffic at a node | |
| CN112088501B (en) | Single-fiber looped network structure | |
| JP2004254339A (en) | Communication network and communication network node device | |
| JP3766949B2 (en) | Optical communication device with path monitoring function | |
| Staessens et al. | Impact of switching technologies on resilience mechanisms in transparent and translucent networks | |
| JPH09275374A (en) | Optical transmission system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |