CN1168349C - Optical cross connection node for crossing between fiber link and wavelength groups - Google Patents
Optical cross connection node for crossing between fiber link and wavelength groups Download PDFInfo
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- CN1168349C CN1168349C CNB001345036A CN00134503A CN1168349C CN 1168349 C CN1168349 C CN 1168349C CN B001345036 A CNB001345036 A CN B001345036A CN 00134503 A CN00134503 A CN 00134503A CN 1168349 C CN1168349 C CN 1168349C
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Abstract
The present invention provides two node structures for realizing optical cross connection in a graded way, which belongs to the node technology in an optical communication network. The structures divide the optical cross connection into two grades, wherein the cross connection in an optical fiber link grade is accomplished in the first grade, and the cross connection in a wavelength channel grade is accomplished in the second grade; the cross connection in the wavelength channel grade is divided into the single wavelength cross connection and the wavelength group cross connection. The present invention has the advantages that the cross connection scale in the two grades is configured according to actual requirements; moreover, the structures use the limited cross capacity of optical switch matrixes to support more service cross. When the configuration is used, the number of required optical switches and relevant components such as multiplexers, demultiplexer, optical couplers, etc., is greatly reduced; simultaneously, the transmission quality of the optical channel can be improved, the influence from various processing functions for the transmission quality of the optical channel can be reduced, and the reliability of the whole system can be increased.
Description
Technical field
The present invention relates to the node structure in a kind of optical fiber communication, refer in particular to a kind of optical cross connection node structure that possesses optical fiber link level and wavelength channel level.
Background technology
The develop rapidly of data service has produced huge demand to transmission network bandwidth, because WDM technology can tenfold even become hundred times of ground to increase to have laid the transmission capacity of fibre circuit, and enjoys favor.Along with the maturation gradually and the commercialization of the communication products that use WDM technology, use the complex network of WDM technology, become to attach most importance to as the research and development of loop network, grid network etc.In this complex network, key equipment is Optical Add/Drop Multiplexer (OADM) and optical cross-connection equipment (OXC).The major function of OADM node is the wavelength channel of appointment up and down in this locality, and the major function of OXC is to be that wavelength channel is sought route, and dredges a large amount of business.Wavelength channel is carried by optical fiber link, and a common wavelength channel is carried by a wavelength, and wavelength channel is made of one or more wavelength channels with same communication source point and logical destination point, and the wavelength of these wavelength channels can have nothing in common with each other.
OXC bears the network backbone node role, and main task is to compile and dredge a large amount of wavelength channels.Being pooled at a large amount of wavelength channels under the situation of OXC, is not that all wavelengths passage all need carry out interconnection realization road function up and down in this locality, and some wavelength channel just through local node, utilizes local node that the physics route is provided.In this case, can carry out interconnection or directly carry out interconnection with the set of wavelengths form this wavelength channel in the mode of optical fiber link.In following document, set of wavelengths is meant the set of a plurality of wavelength of combining in some way, and a set of wavelengths allows to have only a wavelength, but has a wavelength at least.Under extreme case, a set of wavelengths can have only a wavelength.
In addition, the optical cross-connect matrix of large port number still is a product that remains commercialization, and performance also remains to be improved.In this case, if directly carry out interconnection, can alleviate an urgent demand to the optical cross-matrix port number with set of wavelengths or optical fiber link mode.
The protection of optical-fiber network is an important problem.Along with the increase of optical-fiber network transmission capacity, the importance of network survivability problem will be more outstanding.The actual network operation shows that more common network failure is link or node failure rather than single channel fault, for the QoS of reservation is provided, effectively protect these faults.
Present OXC research concentrates on aspects such as wavelength conversion, wavelength route, main implementation method is to be optical fiber link signal demultiplexing single wavelength channel, carry out relevant the processing again, compound etc. as interconnection, optical wavelength conversion, light power equalization and light signal.This method is along with the increase of single fiber reuse wavelengths quantity, and upgrading ability is subjected to very big influence.And effective port number of commercial big Capacity Optical cross matrix and the increase that performance has further limited OXC node port quantity.Along with the increase of reuse wavelengths quantity in the optical fiber link and OXC node port quantity, this will propose serious challenge to the design and the enforcement of network protection algorithm.
And meanwhile, the optical cable of big core number lay the fiber resource that provides sufficient in a large number, how making full use of these resources also is worth further investigation.A kind of method wherein just is to use optical fiber more than needed part as the protection route.If according to common " demultiplexing+intersection+multiplexing " implementation; the processing of the optical fiber link on this protection route will require additionally to increase a lot of related devices; thereby cost is increased greatly, and the transmission quality of optical channel also can produce serious deterioration because of the increase of processing links.
Summary of the invention
At the demand of existing fiber communication and the shortcoming of prior art, the objective of the invention is to propose to possess the optical cross connection node structure of optical fiber link level and wavelength channel level, realize the needed number of devices of big capacity Cross Connect equipment (as OADM, OXC etc.) to reduce, efficiently utilize the limited cross capacity of optical cross-connect matrix, when guaranteeing that wavelength channel for appointment provides enough routing capabilities, strengthen the optical fiber link routing ability of OXC node.
For achieving the above object, a kind of optical cross connection node structure provided by the invention comprises:
One input side optical fibers link level cross-connect matrix;
One output side of optical fiber link level cross-connect matrix;
One wavelength channel level cross-connect module connects the part output of above-mentioned input side optical fibers link level cross-connect matrix and the part input of output side of optical fiber link level cross-connect matrix;
It is that all input optical fibre links are connected to this input side optical fibers link level cross-connect matrix input port that the signal classification of above-mentioned optical cross connection node structure is handled, its output is divided into two groups, one group is connected directly to this output side of optical fiber link level cross-connect matrix, another group is connected to this wavelength channel level cross-connect module, is connected to this output side of optical fiber link level cross-connect matrix again after finishing the interconnection of wavelength channel level.This output side of optical fiber link level cross-connect matrix carries out being connected to amplifier module after the interconnection of optical fiber link level, and this amplifier module is in order to amplifying signal, and its output port is connected directly to the output optical fibre link.That is to say that all optical fiber links all pass through the interconnection of the optical fiber link level of input and output side, and the part optical fiber link carries out the interconnection of wavelength channel level between the interconnection of the optical fiber link level of input and output side.
Realize above-mentioned purpose, another kind provided by the invention possesses the optical cross connection node structure of optical fiber link level and wavelength channel level, comprising:
One optical fiber link level cross-connect matrix;
One wavelength channel level cross-connect module, be positioned on the feedback loop of this optical fiber link level cross-connect matrix, its input is connected with the reservation output of this optical fiber link level cross-connect matrix, and its output is connected with the reservation input of this optical fiber link level cross-connect matrix;
It is that all input optical fibre links are connected to this optical fiber link level cross-connect matrix and carry out the interconnection of optical fiber link level that the signal classification of above-mentioned optical cross connection node structure is handled, its output is divided into two groups, one group directly as the output optical fibre link, another group exports this wavelength channel level cross-connect module to by reserving output, finishes the reservation input that is connected to this optical fiber link level cross-connect matrix after the interconnection of wavelength channel level again.
The described optical cross connection node structure that possesses optical fiber link level and wavelength channel level, the interconnection of the set of wavelengths that wavelength channel level cross-connect module is formed in order to the interconnection of single wavelength or by a plurality of wavelength.
The described optical cross connection node structure that possesses optical fiber link level and wavelength channel level, the input optical fibre link of optical cross connection node equate with the quantity of output optical fibre link or are unequal.
The described optical cross connection node structure that possesses optical fiber link level and wavelength channel level, this wavelength channel level cross-connect module is made up of input side adaptation module, outlet side adaptation module and set of wavelengths cross-connect matrix, optical wavelength signal is exported from the outlet side adaptation module through the set of wavelengths cross-connect matrix by the input of input side adaptation module.
The described optical cross connection node structure that possesses optical fiber link level and wavelength channel level, wherein in the input side adaptation module, also be provided with the Optical Demultiplexing device, this Optical Demultiplexing device can be finished the demultiplexing of a plurality of set of wavelengths, each set of wavelengths can comprise single wavelength, also can comprise a plurality of wavelength;
The outlet side adaptation module is provided with optical multiplexer spare or Light Coupled Device, and this optical multiplexer spare or Light Coupled Device can be finished the multiplexing of a plurality of set of wavelengths or coupling, and each set of wavelengths can comprise single wavelength, also can comprise a plurality of wavelength.
The described optical cross connection node structure that possesses optical fiber link level and wavelength channel level, wherein be provided with 2 * 2 optical switches that are used to finish Add/drop wavelength group function in the input side adaptation module, this 2 * 2 optical switch is connected with the set of wavelengths cross-connect matrix with the Optical Demultiplexing device, with the output wavelength group of Optical Demultiplexing device as input, can accept to set out on a journey set of wavelengths simultaneously as input, its output is as the input of set of wavelengths cross-connect matrix;
Wherein be provided with 2 * 2 optical switches that are used to finish Add/drop wavelength group function in the outlet side adaptation module, this 2 * 2 optical switch is connected with optical multiplexer spare or Light Coupled Device with the set of wavelengths cross-connect matrix, with the output wavelength group of set of wavelengths cross-connect matrix as input, its output also can be used as down the road set of wavelengths as the input of optical multiplexer spare or Light Coupled Device.
Advantage of the present invention is in the wavelength interconnection, further utilize the limited cross-capacity of optical cross-connect matrix, support more optical fiber link, use this configuration, can reduce the optical switch quantity that needs and the quantity of related device greatly, to, Light Coupled Device etc., this might improve the transmission quality of optical channel as optical multiplexer spare/Optical Demultiplexing device, reduce of the influence of various processing capacities, improve the Performance And Reliability of whole system the wavelength channel transmission quality.
After adopting this structure, because the increasing of cross grain, the business ability of dredging of OXC node will strengthen greatly, and because the use of set of wavelengths switching concept, OXC will be more flexible aspect networking, effectively.
The cross connect function of OXC is divided into optical fiber link level cross-connect matrix, wavelength channel level cross-connect module and some slave parts.Main design philosophy is to be realized the direct interconnection of optical fiber link signal by optical fiber link level cross-connect matrix, promptly direct cross-connect matrix with optical fiber totally carries out interconnection to the input optical fibre link signal that is incorporated into OXC as one, is drawn out on each output port again.And finish the cross-coupled optical fiber link signal of wavelength channel level for needs, then use wavelength channel level cross-connect module to realize.
The present invention includes two kinds of structures, functional block diagram as depicted in figs. 1 and 2, they all adopt modular construction to realize.Wavelength channel level cross-connect module for supporting single wavelength can use the photoelectricity hybrid mode, also can use full light mode to realize.
The input optical fibre link of OXC can be identical with the quantity of output optical fibre link, also can be different.Input, the actual number of wavelengths of carrying of output optical fibre link also can be identical or different; And the portable maximum wavelength quantity of single fiber link also can be identical or different.
For wavelength channel level cross-connect module, should at first finish set of wavelengths (the comprising single wavelength) demultiplexing (along separate routes) of input optical fibre link signal, then to these independently set of wavelengths use and to carry out interconnection with ripple or different ripple mode, before being drawn out to the output optical fibre link, the signal multiplexing after using optical multiplexer spare or Light Coupled Device interconnection is to (closing the road) together.In the cross-connect module between Optical Demultiplexing device and optical multiplexer spare (coupled apparatus), may need to finish functions such as wavelength conversion, light power equalization, the present invention includes this possibility.
Demultiplexing optical fiber link signal is finished by the input side adaptation module that is positioned at wavelength channel level cross-connect module.The input side adaptation module can use diverse ways that the optical fiber link signal of input is demultiplexed into set of wavelengths, as use tunable acousto-optic filter, fiber grating, array waveguide grating etc., wherein minimum number of wavelengths is 1 in the set of wavelengths, mostly be most M-1, wherein M is a maximum reuse wavelengths quantity on the every optical fiber.In wavelength channel level cross-connect module, can carry out the wavelength conversion operation to single wavelength channel, also can carry out wavelength conversion to set of wavelengths.Same, the light power equalization of each wavelength also can be realized in this module in the set of wavelengths.
Description of drawings
Fig. 1 is the functional block diagram of the embodiment of the invention 1;
Fig. 2 is the functional block diagram of the embodiment of the invention 2;
Fig. 3 is a wavelength channel level cross-connect module functional block diagram of the present invention;
Fig. 4 is an input side adaptation module functional block diagram in the wavelength channel level cross-connect module of the present invention;
Fig. 5 is an outlet side adaptation module functional block diagram in the wavelength channel level cross-connect module of the present invention;
Fig. 6 is the O/E/O embodiment of the set of wavelengths cross-connect matrix of the single wavelength of the present invention;
Fig. 7 is the network application schematic diagram of OXC node of the present invention.
Embodiment
During below scheme was described, the expression symbol divided capital and small letter, in addition for convenience for the purpose of, suppose that input, the output optical fibre number of links of OXC node all is N, every multiplexing maximum wavelength quantity of optical fiber link all is M.At the attainable wavelength channel of different fiber link not simultaneously, if be M respectively
1, M
2..., M
N, and the hypothesis M that is without loss of generality
1≤ M
2≤ ...≤M
N, then get M=M
NThis invention simultaneously comprises that also input is inequality with the output optical fibre link in the OXC structure, perhaps the unequal situation of maximum reuse wavelengths quantity in each optical fiber link.
The present invention includes the two kinds of OXC structures that can finish interconnection of optical fiber link level and wavelength channel level cross connect function.
As shown in Figure 1, the design philosophy of embodiment 1 is that the N bar optical fiber link of input is divided into two groups in logic earlier, wherein one group of interconnection of only carrying out the optical fiber link level, and remaining optical fiber link is carried out the interconnection of wavelength channel level as another group.Input side optical fibers link level cross-connect matrix 10 is N * (N
1+ N
2) optical fiber link level optical cross-connect matrix, it is divided into 1～N with N bar input optical fibre link
1With 1～N
2Two optical fiber link groups, General N
1+ N
2≤ N, wherein N
1Be to realize cross-coupled input optical fibre number of links in the optical fiber link level; And N
2Be the quantity that to carry out the cross-coupled input optical fibre link of wavelength channel level; Wavelength channel level cross-connect module 40 is cross-connect matrixes of wavelength channel level, finishes the interconnection of a plurality of wavelength channels that transmit on many optical fiber links; Outlet side optical cross-connect matrix 20 is optical fiber link level optical cross-connect matrixes of outlet side, send into output side of optical fiber link level cross-connect matrix 20 simultaneously through the interconnection of wavelength channel level, optical fiber link signal after multiplexing and the optical fiber link signal after the interconnection of optical fiber link level, finish choke free interconnection, improve the flexibility of node configuration; Light amplifier module 30 is light amplifier modules of OXC outbound course, can be used for compensating the loss through the optical signal power that is caused after two kinds of cross-connect matrix interconnections.
Input side optical fibers link level cross-connect matrix 10 can be a strictly non-blocking, also can be non-strictly non-blocking.If be non-strictly non-blocking, need cooperate the strictly non-blocking interconnection of finishing N input optical fibre link and N output optical fibre link with output side of optical fiber link level cross-connect matrix 20.At input side optical fibers link level cross-connect matrix 10 is under the situation of strictly non-blocking, and output side of optical fiber link level cross-connect matrix 20 can be realized with simplified way; And under the situation that input side optical fibers link level cross-connect matrix 10 interconnection Capability Requirements descend, output side of optical fiber link level cross-connect matrix 20 needs carefully to design to satisfy the requirement of strictly non-blocking.The optical cross-connect matrix of input, outbound course can make the realization that ins all sorts of ways, as micro-electromechanical switch (MEMS) technology, plural serial stage technology etc.
As shown in Figure 2, the basic design philosophy of embodiment 2 is identical with embodiment 1, but on specific implementation some difference, it is with the synthetic more optical cross-connect matrix of port number of two optical cross-connect matrixes of embodiment 1 input and output side.Optical cross-connect matrix 50 is the optical fiber link level optical cross-connect matrixes of (N+T) * (N+S), it uses N bar input and output optical fiber link (also to claim the optical fiber link port as the input and output optical fiber link of OXC node respectively, be called for short port), T input port is connected with the output port of wavelength channel level cross-connect module 40 in addition, is used for being incorporated into optical fiber link level cross-connect matrix 50 through the interconnection of wavelength channel level, optical fiber link after multiplexing; S output port is connected with the input port of wavelength channel level cross-connect module 40, carries out the interconnection of wavelength channel level introducing wavelength channel level cross-connect module 40 through the optical fiber link after the interconnection of optical fiber link level; Wavelength channel level cross-connect module 40 is cross-connect modules of realizing the wavelength channel level, finishes the interconnection of a plurality of wavelength channels that transmit on many optical fiber links; A light amplifier module 30 can certainly be on outbound course, increased, the loss of the light signal that is caused through two kinds of cross-connect matrix interconnections can be used for compensating.
Fig. 3 is the functional block diagram of wavelength channel level cross-connect module, comprises the interconnection situation of single wavelength, also comprises the interconnection situation of the set of wavelengths that a plurality of wavelength constitute.
If the input of OXC, output port quantity are N, single fiber carrying wavelength maximum quantity is M, then can carry N * M wavelength at most, if the exchange capacity of wavelength channel level cross-connect module is a R channel, then should reserve the individual output port of S=(R/M)+1 (rounding) at optical fiber link level cross-connect matrix at least.The input port quantity of reserving can be identical with this quantity, also can be different.The interconnection of wavelength channel level can be recombinated or break with the form of set of wavelengths the wavelength of different input links, thereby realizes Network polymerization or distribution.Under the situation of business polymerization, the input port quantity T of reservation can be less than the output port quantity S that reserves, and when using the traffic assignments function, may need to reserve more input link.But the reservation quantity of input or output port all is less than the input port quantity of wavelength channel level cross-connect module; Otherwise can't finish the professional task of dredging.
If the quantity of the optical fiber link of actual bearer business is less than the input port number of wavelength channel level cross-connect module, the business of some input port that then can break is assigned to the output port of appointment; And at all input ports all under the situation of bearer service, the input port quantity that needs to reserve only can be less than or equal to the output port quantity of reservation.The input port quantity of reserving is many more, and the port number of optical fiber link level cross-connect matrix is many more.
After the refinement, wavelength channel level cross-connect module 40 is made of input side adaptation module 60, outlet side adaptation module 70 and set of wavelengths cross-connect matrix 80.The realization of Network polymerization or distribution function depends on input side adaptation module 60 as shown in Figure 4, and wherein WXC is the set of wavelengths cross-connect matrix, and FXC is an optical fiber link level cross-connect matrix.Here, the optical fiber link signal of drawing from optical fiber link level cross-connect matrix carries out the demultiplexing processing.The present invention uses set of wavelengths demultiplexing technology.The M that carries on an optical fiber link wavelength can be distributed according to need into the some groups of interconnections that participate in set of wavelengths.The maximum M-1 of the number of wavelengths of each set of wavelengths, minimum 1.
This distribution is to carry out according to the polymerization of business or distribution requirements.Therefore, the input side adaptation module directly places under the control of network management system, is managed and is controlled by the situation of forming of network management system to each set of wavelengths.
In order to reduce crosstalking and up and down road ability being provided of 60 pairs of set of wavelengths of input side adaptation module, between the input port of the output port of demultiplexing device and set of wavelengths cross-connect matrix, can insert one 2 * 2 optical switch.When needs certain set of wavelengths of road or when blocking certain set of wavelengths input port, this switch is a crossing condition up and down; Otherwise the set of wavelengths signal that straight-through demultiplexing obtains.
Outlet side adaptation module 70 among Fig. 3 is Multiplexing modules of set of wavelengths signal.Its major function is the output wavelength group of reuse wavelengths group cross-connect matrix, and is drawn out to optical fiber link level cross-connect matrix.
Outlet side adaptation module 70 is wavelength polymerization modules, and its number of output ports is the reservation quantity of input port in the optical fiber link level cross-connect matrix.Owing to will finish polymerizable functional, this module is made of one group of Light Coupled Device or optical multiplexer spare.Wherein each coupled apparatus or multiplexing device are all as shown in Figure 5.The input port quantity of each multiplexing device or coupled apparatus is M at the most, all is 1 o'clock multiplexing operation so that all wavelengths group medium wavelength quantity to be provided, and these ports all are connected with the output port of set of wavelengths cross-connect matrix.
In order to reduce the cross talk effect of not carrying the optical wavelength signal passage and road ability up and down to be provided, between the input port of the output port of set of wavelengths cross-connect matrix and optical multiplexer spare or light/coupled apparatus, can insert one 2 * 2 optical switch, its function is identical with 2 * 2 switches in the input side adaptation module, and only uses one group of this way switch up and down in the adaptation module of input and output direction at the most.
Set of wavelengths cross-connect matrix 80 is finished the interconnection of set of wavelengths, and the implementation method of its implementation method and input side adaptation module is closely related.The set of wavelengths cross-connect matrix of single wavelength can adopt all-optical methods to finish, and also can finish realization with O/E/O (photoelectricity light) scheme.All-optical methods is used in the interconnection of the set of wavelengths that is made of a plurality of wavelength usually.
If adopt full light scheme, then use optical switch or extensive cross-connect matrix to realize the interconnection of light signal usually, this is a kind of transparent interconnection scheme.If use opaque O/E/O (photoelectricity light) scheme, as shown in Figure 6, then the output wavelength of this module is general is complementary with ITU-T standard wave length, and generally and the wavelength that uses in system or the network be complementary.In addition, the light power equalization of output wavelength channel will directly be realized in electric Switching Module.The present invention does not get rid of the non-standard wavelength situation of output in the opaque scheme.
If adopt full light scheme, then the wavelength channel after the interconnection enters before the outlet side adaptation module, can carry out the power equalization or the wavelength conversion of wavelength channel level and handle.The equilibrium of this luminous power and the conversion process of wavelength can also can only be handled the wavelength channel of appointment as requested at all by cross-coupled wavelength channel.
If use the set of wavelengths cross-connect matrix of photoelectricity light (O/E/O) scheme implementation list wavelength, then need to use array acceptor.Because outlet side has corresponding electro-optical conversion module, crosspoint is not special and strict to the requirement of single receiver in the array acceptor.But guarantee at needs under the situation of wavelength channel transmission characteristic, will propose about Clock Extraction the requirement of functions such as signal regeneration to all receivers.Input side is an array acceptor as shown in Figure 6.
If use the set of wavelengths cross-connect matrix of O/E/O scheme implementation list wavelength, then need laser array to realize the electro-optical conversion of cross-connect matrix outlet side.If do not increase Wavelength conversion module separately, then generally adopt ITU-T standard wave length's laser array, and should have complete laser control circuit, comprise Wavelength stabilized and control, the stable and control circuit of Output optical power etc.If in structure, increase Wavelength conversion module in addition, then can serviceability require simple relatively laser array.Outlet side is a laser array as shown in Figure 6.
The OXC node that uses this invention to make can be used to set up the network of various topological structures, and the OXC node of two embodiment can be used for constructing link, annular with qualifying shape optical-fiber network.In simple topology, can make full use of the numerous optical fiber that laid, for the optical fiber link signal provides powerful dredging and the interconnection ability.In complex topology structure such as lattice l network, except the optical fiber that abundant use is had more than needed, can also make full use of this node and provide powerful business polymerization, transmission and distribution capability for communication between domains.
Because one of free-revving engine of this invention is to strengthen the dredge ability of OXC node to the entrained business of optical fiber link, reduces the overall cost of node simultaneously, therefore wishes that network node can make full use of optical fiber link level cross-connect matrix.In order to realize the professional ability of dredging effectively, can at first carry out suitable aggregation processing to Network, service wavelength as much as possible is aggregated on the optical fiber transmits, and do not carry out up and down and handle at intermediate node.At certain node, if this node and intermediate node have communication requirement, can utilize the slack between them, also can be via other route implementing communication.
Fig. 7 is an example network that adopts network node shown in the present to form.There are many optical fiber between the node, simplify herein and handle, only give between egress A and the Node B and many optical fiber between Node B and the E.Now suppose node A and Node B, C, D, E, F has business between the G, and all uses a wavelength to carry, and then arrives E, F, the business of three nodes of G can be passed through AB, and link transmission between BE led directly to Node B and distributed at node E.Simultaneously node A can also can be passed through node (method 2.) and be transferred by optical fiber between other AB (method 1.) transmission to the business of B, as node C etc.
Claims (7)
1, a kind of optical cross connection node structure that possesses optical fiber link level and wavelength channel level is characterized in that, comprising:
One input side optical fibers link level cross-connect matrix;
One output side of optical fiber link level cross-connect matrix;
One wavelength channel level cross-connect module connects the part output of above-mentioned input side optical fibers link level cross-connect matrix and the part input of output side of optical fiber link level cross-connect matrix;
It is that all input optical fibre links are connected to this input side optical fibers link level cross-connect matrix input port that the signal classification of above-mentioned optical cross connection node structure is handled, its output is divided into two groups, one group is connected directly to this output side of optical fiber link level cross-connect matrix, another group is connected to this wavelength channel level cross-connect module, be connected to this output side of optical fiber link level cross-connect matrix again after finishing the interconnection of wavelength channel level, this output side of optical fiber link level cross-connect matrix carries out being connected to amplifier module after the interconnection of optical fiber link level, this amplifier module is in order to amplifying signal, and its output port is connected directly to the output optical fibre link.
2, a kind of optical cross connection node structure that possesses optical fiber link level and wavelength channel level is characterized in that, comprising:
One optical fiber link level cross-connect matrix;
One wavelength channel level cross-connect module, be positioned on the feedback loop of this optical fiber link level cross-connect matrix, its input is connected with the reservation output of this optical fiber link level cross-connect matrix, and its output is connected with the reservation input of this optical fiber link level cross-connect matrix;
It is that all input optical fibre links are connected to this optical fiber link level cross-connect matrix and carry out the interconnection of optical fiber link level that the signal classification of above-mentioned optical cross connection node structure is handled, its output is divided into two groups, one group directly as the output optical fibre link, another group exports this wavelength channel level cross-connect module to by reserving output, finishes the reservation input that is connected to this optical fiber link level cross-connect matrix after the interconnection of wavelength channel level again.
3, the optical cross connection node structure that possesses optical fiber link level and wavelength channel level according to claim 1 and 2, it is characterized in that the interconnection of the set of wavelengths that wavelength channel level cross-connect module is formed in order to the interconnection of single wavelength or by a plurality of wavelength.
4, the optical cross connection node structure that possesses optical fiber link level and wavelength channel level according to claim 1 and 2 is characterized in that, the input optical fibre link of optical cross connection node equates with the quantity of output optical fibre link or be unequal.
5, the optical cross connection node structure that possesses optical fiber link level and wavelength channel level according to claim 1 and 2, it is characterized in that, this wavelength channel level cross-connect module is made up of input side adaptation module, outlet side adaptation module and set of wavelengths cross-connect matrix, optical wavelength signal is exported from the outlet side adaptation module through the set of wavelengths cross-connect matrix by the input of input side adaptation module.
6, the optical cross connection node structure that possesses optical fiber link level and wavelength channel level according to claim 5 is characterized in that:
Wherein also be provided with the Optical Demultiplexing device in the input side adaptation module, this Optical Demultiplexing device can be finished the demultiplexing of a plurality of set of wavelengths, and each set of wavelengths can comprise single wavelength, also can comprise a plurality of wavelength;
The outlet side adaptation module is provided with optical multiplexer spare or Light Coupled Device, and this optical multiplexer spare or Light Coupled Device can be finished the multiplexing of a plurality of set of wavelengths or coupling, and each set of wavelengths can comprise single wavelength, also can comprise a plurality of wavelength.
7, the optical cross connection node structure that possesses optical fiber link level and wavelength channel level according to claim 6 is characterized in that:
Wherein be provided with 2 * 2 optical switches that are used to finish Add/drop wavelength group function in the input side adaptation module, this 2 * 2 optical switch is connected with the set of wavelengths cross-connect matrix with the Optical Demultiplexing device, with the output wavelength group of Optical Demultiplexing device as input, can accept to set out on a journey set of wavelengths simultaneously as input, its output is as the input of set of wavelengths cross-connect matrix;
Wherein be provided with 2 * 2 optical switches that are used to finish Add/drop wavelength group function in the outlet side adaptation module, this 2 * 2 optical switch is connected with optical multiplexer spare or Light Coupled Device with the set of wavelengths cross-connect matrix, with the output wavelength group of set of wavelengths cross-connect matrix as input, its output also can be used as down the road set of wavelengths as the input of optical multiplexer spare or Light Coupled Device.
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| US7340175B2 (en) | 2002-01-18 | 2008-03-04 | Nec Corporation | Non-uniform optical waveband aggregator and deaggregator and hierarchical hybrid optical cross-connect system |
| CN101110652B (en) * | 2006-07-18 | 2010-08-18 | 中兴通讯股份有限公司 | Apparatus and method for supporting automatic optical fiber connecting configuration of optical transmission equipment |
| JP5687557B2 (en) * | 2010-06-21 | 2015-03-18 | 日本電信電話株式会社 | Wavelength path relocation method and upper layer path relocation method |
| CN105871498B (en) * | 2015-01-21 | 2019-03-29 | 中兴通讯股份有限公司 | A kind of device, method and the photoelectricity mixing cross system of optical cross connect scheduling |
| CN105099560B (en) * | 2015-07-28 | 2018-03-23 | 上海交通大学 | Clog-free extension system and method based on multiple disjoint one-way optical fiber looped networks |
| CN105578315B (en) * | 2015-12-15 | 2023-01-24 | 天津光电通信技术有限公司 | Non-blocking cross network circuit based on 16x16 cross chip composition and implementation method |
| CN108462535B (en) * | 2017-02-20 | 2022-08-30 | 中兴通讯股份有限公司 | Network element level optical layer cross capacity management method and device |
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