CN100488083C - Service scheduling device in optical communication network and method thereof - Google Patents
Service scheduling device in optical communication network and method thereof Download PDFInfo
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Abstract
The invention discloses an apparatus and method for business scheduling in the optical communication network. The said apparatus and method applies the null separation cross connection technology based on the null separation cross platform to realize the scheduling. Proceeding the decomposition and convergence processing circuit signal on each nodes, and having cross processing on the different business signal after decomposition and ascending/descending business signal to realize the transparent transmission and relay, and flexibly scheduling all the businesses and transmit them on the same channel.
Description
Technical field
Service dispatching technology in the present invention relates to communicate by letter, particularly the service dispatching technology in the optical communication network.
Background technology
Along with the progress of science and technology and the development of society, the communication technology becomes more and more important in social production and people's life.In order to adapt to multiple demand, the various communication technologys and communication network are born thereupon.Simultaneously, Ye Wu variation makes communication network need realize the transmission of multi-service efficiently.In recent years, appearance along with emerging services such as broadband access the Internet, mobile communication, Digital Television, multi-media communication, storage, data carried by data business demand sharp increase in the communication network, especially in just the speed sustainable development of big or middle city data business volume to be doubled in each season, and the impetus is also very powerful, this is just to communication network, especially aspects such as the efficiency of transmission of metropolitan area network (Metropolitan Area Networks is called for short " MAN ") and resource utilization have proposed new requirement.The consensus of communication in the circle be, to compare with the digital network of today to be huge to data quantity transmitted in the future network, and require advanced person's regular maintenance and administrative skill.
Be to make up the bridge between backbone network and Access Network, and satisfy and the demand of intercity business development in the city in, metropolitan area network will become focus, the especially data service of next round telecommunications construction.The metropolitan area network complex environment proposes all difficult problems to the construction of network, thereby produces the new technology of many construction metropolitan area networks.At present, emerging metropolitan area network technology platform: based on SDH (Synchronous Digital Hierarchy) (Synchronous DigitalHierarchy, abbreviation " SDH ") Synchronous Optical Network (Synchronous Optical Network, be called for short " SONET "), Resilient Packet Ring (Resilient Packet Ring, be called for short " RPR "), multi protocol label exchange (Multi-Protocol Label Switching, be called for short " MPLS "), metropolitan area wavelength division multiplexing (Wavelength Division Multiplexing, be called for short " WDM ") etc., in time alleviated certain transmission pressure, but the existing technical problem of corresponding solution also produces thereupon: bandwidth is not enough, dilatation cost height, the networking complexity, the whole network lacks unified management dispatching etc., has had a strong impact on further developing of communication networks such as metropolitan area network.
At client layer diversity of operations and complexity, the metropolitan area network technology must be to the evolution of efficient carrying multi-service direction.After in backbone network and long-distance network, using, wavelength-division multiplex technique, dense wave division multipurpose (Dense Wavelength Division Multiplexing particularly, be called for short " DWDM ") also begin to use at metropolitan area network, particularly the autgmentability of its huge capacity, network and professional expandability demonstrate distinctive advantage in metropolitan area network.It can provide high bandwidth and support wavelength to hire out, product platform is to protocol transparent, support Internet protocol (Internet Protocol, abbreviation " IP "), time division multiplexing (TimeDiVision Multiplexing, be called for short " TDM ") wait multiple business, and can dilatation not influence existing business by opening next wavelength.
The DWDM platform will carry a large amount of all kinds of business for the business transmission provides huge bandwidth resources on this platform, professional transmission only is desirable to provide a transparent channel, and does not destroy business structure.Scheduling capacity and flexibility to business simultaneously also proposed requirement: at first, need the service dispatching capacity very big, and can be up to tens lucky capacity; And want to handle flexibly each other intersection of level, scheduling, and for example: wavelength level, promptly finish the professional flexible dispatching of a plurality of wavelength; Also can finish simultaneously flexible dispatching, for example: can in net, allocate arbitrarily all upper and lower business of client's side, and traffic criteria, agreement not made any modification based on service level.
As seen, no matter in modern multi-service communication networks such as metropolitan area network, promote the service dispatching ability and be to solve the metropolitan area network existing issue, realize the necessary approach that professional high-efficiency transfer and Internet resources height utilize based on other technologies such as DWDM or SDH.At present the business scheduling method in the converging of metropolitan area network, core transportation level mainly contains: the intersection of lower level, multiplexing, transmission, as the whole network TDM technology based on SDH, perhaps the wavelength level of higher level electricity intersects or the light intersection, as Optical Add Drop Multiplexer (OpticalAdd/Drop Multiplexing is called for short " OADM ").
Present stage can only provide simple point-to-point transmission on the WDM platform, therefore the OADM looped network realizes with the wavelength being the service dispatching and the management of unit at present, any different business is all used the transmission of wavelength channel, the signal of different wave length is carried out cross scheduling at the node of Optical Transmission Network OTN.
The OADM system mainly contains two kinds of forms: fixed wave length and dynamic configurable OADM.If select certain or some fixing wavelength channels to carry out add drop multiplex, then be called fixed wave length OADM, if the wavelength channel of add drop multiplex is configurable, then be called configurable OADM.Dynamic configurable OADM can realize selectable wavelength signals about, or all the wavelength business about.OADM only from transmission equipment freely, professional up and down selectively, and do not consider its particular content.
No matter being the OADM or the dynamic configurable OADM of fixed wave length, all is to carry out service dispatching in wavelength level.In fact because the different business of ownership place, need dispatch flexibly at each website, up and down, OADM can only transmit a business with wavelength-division of point-to-point, like this, the wavelength channel of one ten lucky even wideer bandwidth is very likely just taken by one tens, the business of hundreds of million, has wasted wavelength resource greatly.
Because in the OADM looped network, different business must be by different wavelength channel carryings, can not distinguish or merge transmission the business of different demands and character, have directly limited the raising of service dispatching flexibility, efficiency of transmission and resource utilization.And, because different wave length passage multiplexing on the core transmission line caused the generation of wave dispersion and loss, limited the transmission quality of light signal.If adopt devices such as optical signal amplifier to compensate thus, then can increase system complexity and network cost greatly.
Another is based upon the business scheduling method that the TDM exchanged form is provided on original SDH platform, also has many actual application problem.Because the service dispatching of time domain must satisfy unified SDH standard of the whole network and timing, this will produce the clock information that causes because of standard difference and lose the mortality problems such as synchronous that lose for the communication network of multi-operators such as metropolitan area network coexistence.Simultaneously, owing to change clock and must synchronously can bring damage for business like this submitting with step platform, the service dispatching of time domain can not be realized professional transparent transmission.SDH operation back clock information can not transparent transmission etc. problem, lost the fundamental characteristics of WDM transparent transmission service, weakened the competitiveness of WDM greatly.
As seen, because the professional particle of the converging of metropolitan area network, core aspect is big and full, type of service is many, the standard, the agreement that involve are many, characteristics such as traffic carrying capacity is big, present various methodologies business scheduling method all can not well solve the problem that present metropolitan area network development is faced.
In actual applications; there is following problem in such scheme: the scheduling of wavelength level or synchronous destruction for transparent transmission; make that all utilization rate of network resource such as bandwidth is low in the metropolitan area network; professional efficiency of transmission is low; the dispatching of multiple business is low; and lack flexibility and service protection efficiently, seriously limited the development of communication networks such as metropolitan area network.
Cause the main cause of this situation to be, current with the wavelength be unit business scheduling method, can not handle various business neatly, can not solve the Resource Allocation in Networks problem with the method for planning as a whole, the waste of wavelength resource has also caused the transmission quality of light signal to descend, and greatly reduces the performance and the practicality of optical-fiber network; And, then can not adapt to the network system of multi-operator coexistence based on synchronous business scheduling method of time-division, can not realize professional transparent transmission, the transparent transmission characteristic of the optical-fiber network of destruction.
Summary of the invention
In view of this, main purpose of the present invention is to provide the devices and methods therefor of the service dispatching in a kind of optical communication network, make various communication networks, particularly based on the metropolitan area network of optical transmission, can realize professional transparent transmission, realize professional end-to-end management, realize the flexible dispatching of service level, making full use of of Internet resources such as realization wavelength, thus network capacity and multiple service supporting ability improved.
For achieving the above object, the invention provides the service dispatching device in a kind of optical communication network, comprise control unit, service dispatching unit, be distributed in a plurality of professional pretreatment unit and the professional post-processing unit in client's side and line side, wherein,
The described professional pretreatment unit in line side is used to receive the light signal from the business in described line side, carries out opto-electronic conversion and a plurality of business that single wavelength carries are separated pooling a plurality of separate traffic; The described professional pretreatment unit of client's side is used to receive the light signal from the separate traffic of described client's side, carries out opto-electronic conversion; Described professional pretreatment unit also is used for the business of receiving is monitored, and gives described control unit with the state information report that monitors;
Described control unit is used for the configuration information according to described state information and described optical communication network, produces and issues control information and give described service dispatching unit;
Described service dispatching unit is used for according to described state information, carry out the scheduling of business-level to handling by interconnection from each separate traffic of described professional pretreatment unit, need output to the described professional post-processing unit of client's side in the business of this locality termination, other business output to the described professional post-processing unit in line side;
The described professional post-processing unit of client's side is used to carry out the electric light conversion and exports to described client's side; The described professional post-processing unit in line side is used to carry out service convergence and electric light is changed and exported to described line side.
Wherein, described separate traffic is the gigabit Ethernet business.
Described service dispatching unit adopts electricity intersection device to realize;
Adopt described device backboard cabling or cable ways of connecting realize the signal transmission between described each unit.
Described service dispatching device is applied in the wavelength division multiplexing communications network.
Described service dispatching device is applied to communication network under the dual-homed service model; Communication network comprises the sub rate multiplexing system under the described dual-homed service model; Communication network comprises the communication network of carrying gigabit Ethernet business under the described dual-homed service model.
Having at least the light wave of a wavelength to be converged by 4 road gigabit ethernet signals in the light signal of described business from the line side forms.
The present invention also provides the device of the service dispatching in a kind of optical communication network, and comprise control unit, service dispatching unit, be distributed in a plurality of professional pretreatment unit and the professional post-processing unit in client's side and line side, wherein,
The described professional pretreatment unit in line side is used to receive the light signal from the business in described line side, carries out opto-electronic conversion and a plurality of business that single wavelength carries are separated pooling a plurality of separate traffic; The described professional pretreatment unit of client's side is used for the light signal from the business of described service dispatching unit is carried out opto-electronic conversion; Described professional pretreatment unit also is used for the business of receiving is monitored, and gives described control unit with the state information report that monitors;
Described control unit is used for the configuration information according to described state information and described optical communication network, produces and issues control information and give described service dispatching unit;
The described professional post-processing unit of client's side is used to receive the signal of telecommunication from the described professional pretreatment unit in line side, carries out the electric light conversion; The described professional post-processing unit in line side is used to receive the signal of telecommunication from the described professional pretreatment unit of client's side, carries out outputing to described line side after service convergence processing and the electric light conversion;
Described service dispatching unit is used for according to described control information, to from each separate traffic of the described professional post-processing unit of described client's side or client's side by the finish dealing with scheduling of business-level of interconnection, the light signal of the business that need terminate in this locality outputs to described client's side, and other professional light signals output to the described professional pretreatment unit of client's side.
Wherein, described separate traffic is the gigabit Ethernet business.
Described service dispatching unit adopts light intersection device to realize;
Described device adopts optical cable to realize that the signal between described each unit transmits.
Described service dispatching device is applied in the wavelength division multiplexing communications network.
Described service dispatching device is applied to communication network under the dual-homed service model; Communication network comprises the sub rate multiplexing system under the described dual-homed service model; Communication network comprises the communication network of carrying gigabit Ethernet business under the described dual-homed service model.
Having at least the light wave of a wavelength to be converged by 4 road gigabit ethernet signals in the light signal of described business from the line side forms.
The present invention also provides the business scheduling method in a kind of optical communication network, comprises following steps:
The professional pretreatment unit of A client's side will be converted to the signal of telecommunication from the light signal of the business of client's side, and output to the service dispatching unit, monitor simultaneously and give control unit with the state information report that generates; The professional pretreatment unit in line side will be converted to the signal of telecommunication from the light signal of the business in line side, carry out business and separate and converge, and output to described service dispatching unit, monitor simultaneously and give described control unit with the state information report that generates;
The described control unit of B is according to the configuration information of described state information and described optical communication network, controlling described service dispatching unit carries out interconnection to the signal of telecommunication from the described professional pretreatment unit in client's side and line side and handles, finish service dispatching, the signal of telecommunication of the business that need terminate in this locality outputs to the professional post-processing unit of client's side, and the signal of telecommunication that other are professional outputs to the professional post-processing unit in line side;
The described professional post-processing unit of C client's side will be a light signal from the electrical signal conversion of described service dispatching unit, output to client's side; The described professional post-processing unit in line side will carry out service convergence from the signal of telecommunication of described service dispatching unit, and output to the line side after transferring light signal to.
Wherein, described business is a gigabit Ethernet business professional or that formed by a plurality of gigabit Ethernet service convergences.
Have at least the light wave of a wavelength to form in the light signal of described business from the line side by multichannel data service signal or synchronous service signal combination.
Having at least the light wave of a wavelength to be converged by 4 road gigabit ethernet signals in the light signal of described business from the line side forms.
The present invention also provides the business scheduling method in a kind of optical communication network, when the light signal received from the business in line side, comprises following steps:
The professional pretreatment unit in line side is converted to the signal of telecommunication with this light signal, carries out business and separates convergence processing, sends to the professional post-processing unit of client's side;
The described professional post-processing unit of client's side is a light signal with the electrical signal conversion of receiving, sends to the service dispatching unit;
Described service dispatching unit carries out interconnection to the light signal of receiving to be handled, finish service dispatching, the light signal of the business that need terminate in this locality is exported to client's side, other professional light signals are converted to the signal of telecommunication by the professional pretreatment unit of client's side, export to the line side after the professional post-processing unit by the line side carries out service convergence and is converted to light signal again;
When the light signal received from the business of client's side, comprise following steps:
Described service dispatching unit carries out interconnection to this light signal to be handled, and finishes service dispatching, sends to the described professional pretreatment unit of client's side;
The described professional pretreatment unit of client's side is converted to the signal of telecommunication with the light signal of receiving, sends to the professional post-processing unit in line side;
The described professional post-processing unit in line side carries out service convergence to the signal of telecommunication of receiving to be handled, and exports to the line side after being converted into light signal.
Wherein, described business is a gigabit Ethernet business professional or that formed by a plurality of gigabit Ethernet service convergences.
Have at least the light wave of a wavelength to form in the light signal of described business from the line side by multichannel data service signal or synchronous service signal combination.
Having at least the light wave of a wavelength to be converged by 4 road gigabit ethernet signals in the light signal of described business from the line side forms.
By relatively finding, technical scheme difference with the prior art of the present invention is, adopted the service dispatching of realizing business-level based on the space division cross interconnection technique of space division cross platform, line signal is decomposed convergence processing at each node, and different business signal and the up-downgoing service signal after decomposing carried out cross processing, realize the transparent transmission and the relaying of service signal, and can realize the flexible dispatching of miscellaneous service, a plurality of different business can be transmitted at a wavelength channel.
Difference on this technical scheme; brought comparatively significantly beneficial effect; the service dispatching that is business-level makes multiple business transmit in network according to flexible; efficiently; a plurality of different business have been saved Internet resources greatly by a wavelength channel carrying; improved resource utilization; service signal has realized that in the processing of each intranodal business manages end to end; and service signal has reduced the decay of signal in Network Transmission greatly at the relaying of each intranodal; saved the extra cost of bringing because of power amplifying device or relaying device; multiple capacity; the transparent transmission of the business of speed has improved network capacity and bearing capacity; optical layer protective fast can be provided; improve the reliability of network, can satisfy big capacity; multiple class; complex structure; organize the requirement of flexible net communication.
Description of drawings
Fig. 1 is the structural representation of space division cross platform according to an embodiment of the invention;
Fig. 2 is the structure based on the service dispatching device of space division cross interconnection technique that adopts that electricity intersects that device realizes according to an embodiment of the invention;
Fig. 3 is the service dispatching process in the DWDM looped network according to an embodiment of the invention;
Fig. 4 is network configuration and the traditional business dispatching device and the respective network resource distribution schematic diagram of a dual-homed service data model;
Fig. 5 is that the structure and the respective network resource of service dispatching device in the dual-homed service data model according to an embodiment of the invention distributed schematic diagram;
Fig. 6 is the service dispatching apparatus structure schematic diagram that employing light intersection device according to an embodiment of the invention is realized;
Fig. 7 is the flow chart of business scheduling method according to an embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
The present invention proposes a kind ofly to realize by the space division cross interconnection technique,, efficiently service dispatching apparatus and method transparent based on service level, can satisfy professional requirement of fast, dispatching arbitrarily in each aspect flexibly, can be applied to various communication networks, especially based on the metropolitan area network of optical transmission.
In one embodiment of the invention, at big capacity, transparent transmission and the cross-coupled requirement that the metropolitan area network of optical transmission proposes, provide a kind of technical solution that realizes service dispatching based on the space division cross platform of service level.
Elaborate each part of the space division cross platform of described service level below with reference to Fig. 1.The space division cross platform is made up of business interface unit 101,103 3 parts in space division cross unit 102 and WDM unit.
Wherein, business interface unit 101 is used to finish the business interface with client's side, and common have function to have: opto-electronic conversion, performance monitoring, the conversion of sign indicating number type etc., through after this resume module the service nondestructive consumption being delivered to space division cross unit 102;
Space division cross unit 102, be used to realize professional transparent transmission, can satisfy this key property of WDM transparent transmission, can finish professional any intersection again, can to any wavelength of WDM unit 103, go any operation exchange that business interface unit 101 is sent here, finish the service dispatching function very flexibly, and provide very perfect protection route for business;
Those of ordinary skill in the art are appreciated that the WDM unit 103 with above-mentioned space division cross platform changes into other various physical layer interfaces realizations, promptly can be applicable to the communication network of other types, and does not influence the spirit and scope of the invention.
In one embodiment of the invention, on above-mentioned space division cross platform, employing electricity intersection device has been realized the service dispatching device based on the space division cross interconnection technique.
Fig. 2 shows the structure based on the service dispatching device of space division cross interconnection technique that adopts that electricity intersects that device realizes.According to signal flow to, be respectively professional pretreatment unit 201, service dispatching unit 203, professional post-processing unit 202, and three unit of control unit 204 and other are connected.Wherein being directed to two-way signaling handles, in client's side and line side professional pretreatment unit 201 and professional post-processing unit 202 are arranged all, simple among the figure in order to represent, the professional pretreatment unit 201 and the professional post-processing unit 202 of the same side are drawn in together, and in the practical application, often also two unit are bundled.This space division cross jockey links to each other with a plurality of client signals in client's side, and is continuous at a plurality of optical transmission units (Optical Transmission Unit is called for short " OTU ") of line side and optical transport network.Like this, client's uplink and downlink signals is all handled through the space division cross device, both a plurality of service signals can be incorporated in a wavelength sends, also can realize from the network signal of this node of process, decompositing service signal and other service signals of transparent transmission that arrive this node, finish the multiple business scheduling of client and network.
In the service dispatching process,, after professional pretreatment unit 201 opto-electronic conversion of client side signal 1～n through client's side, become the signal of telecommunication and export to service dispatching unit 203 when when client's side is up to the line side; Professional pretreatment unit 201 is monitored client's side business signal simultaneously simultaneously, produces state information 205 and gives control unit 204; Control unit 204 produces corresponding control information 206 and is handed down to service dispatching unit 203 according to state information 205 that receives and collected network configuration information; Client's side business signal that service dispatching unit 203 is received according to 206 pairs of control informations that receive carries out interconnection to be handled, and exports to the professional post-processing unit 202 in different line sides, produces line signal and gives corresponding OTU, i.e. signal OTUl～OTUk.
Same, from the network signal of the input in line side professional pretreatment unit 201 through the line side, separate and pool a plurality of service signals, simultaneously service signal is monitored, produce state information 205 and give control unit 204, control unit 204 produces corresponding control information 206 and is handed down to service dispatching unit 203 according to the network configuration information of state information 205 that receives and collection; The 203 pairs of service signals in service dispatching unit carry out interconnection to be handled, and exports to the professional post-processing unit 202 of client's side or the professional post-processing unit 202 in line side and carries out subsequent operation.
The above-mentioned service dispatching device of handling based on interconnection can be realized the scheduling feature of service level.Such as, in the OTU1 network signal from the line side, may comprise a plurality of service signals, these service signals can be resolved into single service signal through the professional pretreatment unit 201 in line side; So just can judge that at control unit 204 those service signals arrive this node, concurrent corresponding control information 206; And in service dispatching unit 203, the control information 206 that provides according to control unit 204, need give the corresponding service post-processing unit 202 of client's side at the service signal of this locality termination, give corresponding client through electric light conversion by professional post-processing unit 202; In addition, service dispatching unit 203 also with other need be by the our station transparent transmission service signal, and the client signal of uploading from this locality is then given corresponding other the professional post-processing unit 202 in line side and is continued to transmit in network.As seen, owing to adopt this cross processing, to the service signal of uploading through the service signal and the our station of our station transparent transmission, all pass through the parsing convergence processing of electricity, avoided the problem of service signal, just can save expensive relay process unit because of the too much Signal Degrade that causes of intermediate stations of break-through; Simultaneously,, realized the shared and professional flexible uplink and downlink of wavelength channel, improved network resource utilization greatly because service dispatching carries out at business-level.
In a preferred embodiment of the present invention, adopted backboard cabling or cable to realize being sent to from a veneer transmission of another piece veneer at the different client signals of an intranodal, in the foregoing description, the transparent transmission signal demand of this node just can adopt backboard cabling or cable to realize the transmission of a veneer to another piece veneer from different OTU break-through.
For further elaborating service dispatching apparatus and method of the present invention, Fig. 3 shows in one embodiment of the invention, service dispatching process in the DWDM of one four node looped network.
As shown in Figure 3, forming in the bidirectional loop network by node 301, node 302, node 303 and 304 4 nodes of node, outer shroud in the counterclockwise direction, there is the plurality of client signal in interior ring along clockwise direction in the ring.The internal frame diagram of service dispatching device of only having drawn node 301 among the figure, other websites are similar.
Elaborate the service dispatching mechanism of node 301 among Fig. 3 below, when being sent to the line signal of OTU305 from node 302 in the outer shroud, comprised from node 302 to node 301 service signal 321 and 303 service signal 323 from node 302 to node, after the processing of this line signal through the pairing professional pretreatment unit of optical convering unit OTU305, resolve into independent client signal; By cross unit and control unit,, client signal 321 intersections that wherein terminate at node 301 are sent to client's side business post-processing unit then, download at node 301 according to above-mentioned service dispatching mechanism; Simultaneously, need be sent to the client signal 313 of node 303 from node 301, in processing such as process pretreatment unit and cross units, with the service signal 323 that needs transparent transmission, pool line signal through professional post-processing unit, output in the fibre circuit by OTU306 at last.
Same, for similarly handling through the line signal that interior ring is sent to node 301 from node 303, be about to from node 303 to node 301 service signal 331 and 302 service signal 332 decomposes from node 303 to node, service signal 331 is downloaded at node 301, continued to be sent to node 302 and node 301 is pooled line signal to the client signal 312 of node 302 with service signal 332.
As seen above-mentioned service dispatching process is the scheduling of business-level, a plurality of service signals can be encapsulated in a wavelength channel transmission fully.Such as, above-mentioned service signal 321 and service signal 323, though the destination node difference: service signal 321 is in node 301 terminations, and service signal 323 is in node 303 terminations; But owing to the decomposition that the scheduling of business-level is all carried out at each node, converge and relaying: service signal 321 decomposes and downloads at node 301, and service signal 323 continues transparent transmissions; Therefore, just transmit multiple different business at node 302 to wavelength channel of 301 needs of node.
In another embodiment of the present invention, adopt the space division cross interconnection technique, in sub-rate system, realized service dispatching, and contrasted that bigger advantage is arranged with former method.Such as, the system of 5G line unit is provided at 4 GE signal transparent mapped that provide in invention " a kind of sub rate multiplexing methods, devices and systems " (Chinese patent application number be: " 200410003052.0 "), in conjunction with space division cross interconnection technique of the present invention, just can realize the flexible and efficient scheduling of GE business.
According to invention " a kind of sub rate multiplexing methods, devices and systems ", Fig. 4 shows the network configuration of a dual-homed data service model, and under the situation that adopts the traditional business dispatching method, node OTU structured flowchart and wavelength resource distribution condition.
Shown in Fig. 4 a, in this dual-homed service model, node 401, node 402 are home node, and node 403, node 404, node 405 and node 406 are from node, and each is from all existing a GE business between node and the home node.
Shown in Fig. 4 b, in the conventional node structure under the former business scheduling method, each OTU can only realize the wavelength Conversion function of GE business separately, so each all needs a wavelength channel between node and each home node.So, need altogether 8 wavelength just can finish all from communicating by letter between node and the home node for 4 access situations from node.
Fig. 4 c shows the distribution condition of wavelength resource in described dual-homed service model.As seen, under former business scheduling method, each wavelength can only carry 1 GE business, and bandwidth availability ratio is low.And in this application, in each wavelength channel, only carry out signal analysis and processing at passage two end nodes, conciliate multiplexing process at the wavelength division multiplexing that intermediate node then needs to carry out light.Such as, node C GE2 business to Node B, during through node D, E, F, must make the demodulation multiplexer of using up that this service signal is demultiplexed into wavelength X 2 earlier, carry out with other break-through wavelength signals more multiplexing, synthetic multi-wavelength signals.The processing of each node all needs so operation.Therefore, because the insertion loss of optical fiber attenuation and optical multiplexer/demodulation multiplexer will cause that optical signal power reduces, transmission quality descends.In actual applications, often carry out suitable luminous power and amplify, just can overcome receiving terminal, reduce the stability of a system because the low excessively problem that can't correctly receive of causing of luminous power has so just increased system complexity and network cost.
And adopt the space division cross interconnection technique to realize the scheduling of GE service signal, it is low and use the shortcoming of expensive amplifier, the flexibility of increase GE service signal dispatching just can to overcome above-mentioned bandwidth availability ratio.Find in the practical application, under identical configuring condition, only need to use 1 wavelength just can handle 8 GE business simultaneously.Service dispatching device in the dual-homed data service model that the employing space division cross interconnection technique according to an embodiment of the invention that shows Fig. 5 realizes, and respective network resource distribution condition.
Fig. 5 a shows the space division cross that adopts according to an embodiment of the invention and realizes the node apparatus structure chart of GE service dispatching in the sub rate multiplexing system.By 2 home nodes: node 501 and node 502,4 from node: the network that node 503, node 504, node 505, node 506 are formed, each from node except up and down local produce and the GE business of termination, also finish other break-through functions through other nodes GE business.
With reference to Fig. 5 a, be example with service dispatching device from node 503, the service dispatching processing procedure is described.In the system both sides, with include 4 GE signals in the 5G line signal that home node 501 links to each other, GE1,3,5,7 and includes 4 GE signals in the 5G line signal that home node 502 links to each other, GE2,4,6,8, wherein each GE signal comprises two passages of uplink and downlink.There is a up-downgoing GE signal all and between each home node in each from node like this.For example, the GE service signal is GE1 between node 503 and the node 501, and the GE service signal between node 503 and the node 502 is GE2.In this bidirectional loop network, each node all sends the past home node of GE signal or is descending from home node.And the service dispatching device of each node is finished the function of this node of up-downgoing service signal and other node traffic signals of transparent transmission.For example,, receive descending GE1,3,5,7, during through this node,,,, converge together and form GE2,3,5,7, continue to transmit next node 504 with the descending GE3,5,7 of transparent transmission simultaneously with up GE2 with GE1 decomposition and descending from home node for node 503.Simultaneously, node 503 also receives up GE3,5,7 and descending GE2 from node 504, handles by this node, and GE2 is descending, simultaneously with up GE1, with the up GE3,5,7 that needs transparent transmission, converges together and forms GE1,3,5,7, the up home node 501 of giving.Other node processing are similar.
Fig. 5 b shows the space division cross that adopts according to an embodiment of the invention and realizes the network configuration and the Resource Allocation in Networks situation of GE service dispatching in the sub rate multiplexing system.As seen, because the service dispatching device of service level makes different GE business transmit at same wavelength channel, so the whole network only needs 1 wavelength resource (λ 0) can carry 8 GE business (GE1-8).Adopt the advantage of another highly significant of this service dispatching device to be, because processing such as each node all can receive the GE business, opto-electronic conversion, intersection, electric light conversion, transmission, realize service processing function at the electricity layer, play the effect of signal relay simultaneously, therefore certain professional situation that does not all have signal processing continuously through several sections of striding can not appear, so, do not need expensive image intensifer and dispersion compensation device as long as consider the influence that the section of striding between two nodes is brought; If adopt the OTU unit (shown in Figure 5) of traditional GE,, need be thought of as optical property deterioration such as compensation signal to noise ratio, chromatic dispersion and the cost that the extra indemnifying measure taked is introduced and the factor of system complexity for business in the node break-through.
Key technology of the present invention is to use based on the service dispatching unit of space division cross platform and realizes professional any scheduling feature in the client signal rank, after the decomposition of finishing service signal, implementation as for empty separate service scheduling unit can be diversified, realize such as above-mentioned employing electricity interconnection chip, perhaps also can adopt the optical cross connect chip to realize the service dispatching unit that for example adopts discrete elements such as optical switch, coupler to build.
Fig. 6 shows in one embodiment of the invention, adopts the service dispatching apparatus and method of optical cross connect chip realization based on the space division cross interconnection technique.When adopting light to intersect device when realizing the space division cross of business-level, the light signal that must be earlier a plurality of service signals in line side be converged is decomposed into the light signal of single business, directly carries out the space division cross processing then between these light signals and client's light signal.So, online drive test must be finished the decomposition of light signal earlier and converge, in this embodiment of the present invention, professional preliminary treatment of employing ground floor earlier or post-processing unit carry out opto-electronic conversion and signal of telecommunication decomposition or converge, the signal of telecommunication after will decomposing or converge then, finish the electric light conversion by professional preliminary treatment of the second layer or post-processing unit, obtain light signal.
In Fig. 6, the service dispatching device is made up of service dispatching unit and inside and outside two layer service preliminary treatment, post-processing unit.Client side signal 1～n gives light service dispatching unit, directly the photosphere client signal being carried out interconnection handles, client's light signal after output intersects is given the professional post-processing unit of internal layer again, carry out opto-electronic conversion, be transformed to client's signal of telecommunication, a plurality of client's signals of telecommunication with equidirectional converge to outer field single professional post-processing unit then, and the electric light conversion by this business post-processing unit sends on OTU.In like manner, the line-side signal of input is through the electric light conversion process of outer field professional pretreatment unit, be converted to the signal of telecommunication, and be decomposed into a plurality of professional signals of telecommunication, respectively each professional signal of telecommunication is sent separately to a professional pretreatment unit of internal layer then, through the electric light conversion, send light service dispatching unit to, after the cross processing, the client signal that needs are descending is passed to respective client, need the interior layer service post-processing unit of then returning to of transparent transmission, converge to outer layer service post-processing unit with above-mentioned up client's signal of telecommunication, and send at OTU through the electric light conversion through after the opto-electronic conversion.
In above-mentioned service dispatching process, professional preliminary treatment, post-processing unit detect service signal, and uploaded state information gives control unit, and control unit issues corresponding control information according to business state information and the network configuration cases received to the service dispatching unit.The service dispatching unit carries out corresponding cross processing according to the control information that receives.Optical cross connect is handled with electric interconnection processing method similar, and different places is that the signal of direct cross processing is a light signal.In one embodiment of the invention, directly adopt optical fiber to realize that the signal between the different units connects in the optical cross connect processing.
Those of ordinary skill in the art are appreciated that, the space division cross interconnection technique that is adopted in the above-mentioned service dispatching device, except electricity intersection device and light intersection device, can also adopt other any methods to realize according to system's needs, can finish goal of the invention equally, and not influence the spirit and scope of the invention.
At last, Fig. 7 shows business scheduling method flow chart according to an embodiment of the invention.
In step 701, in client's side, professional pretreatment unit carries out preliminary treatment and sends cross-connect module to up service signal, monitors simultaneously and gives control unit with the state information report that generates; In the line side, professional pretreatment unit carries out preliminary treatment to the line activities signal, is decomposed into single service signal, and sends cross-connect module to, monitors simultaneously, and gives control unit with the state information report that generates.
Then enter step 702, control unit issues control information and gives the service dispatching unit according to the state information that reports and the network information of collection.
Then enter step 703, the service signal after cross-connect module decomposes the up service signal of pretreated client's side and line side according to control information carries out interconnection to be handled, and sends the corresponding service post-processing unit to.The line side service signal that needs are descending sends client's side business post-processing unit to; Service signal with client's side needs up service signal and line side to need transparent transmission converges to the corresponding service post-processing unit.
Then enter step 704, professional post-processing unit carries out reprocessing in client's side to service signal, and the line side service signal that needs are descending carries out reprocessing, and descending at the respective client channel; With the service signal that client's side needs up service signal and line side to need transparent transmission, converge and be line signal, report and submit on the line through reprocessing.
More than be a basic procedure, if the use of service dispatching unit is electricity intersection device, then concrete flow process is as follows:
When the light signal received from the business of client's side, the professional pretreatment unit of client's side is converted to the signal of telecommunication with light signal, and outputs to the service dispatching unit, monitors simultaneously and gives control unit with the state information report that generates;
Control unit is according to the configuration information of state information and communication network, control service dispatching unit carries out interconnection to the signal of telecommunication from the professional pretreatment unit in client's side and line side to be handled, finish service dispatching, will send to the professional post-processing unit in line side through the signal of telecommunication of scheduling;
The professional post-processing unit in line side will carry out service convergence from the signal of telecommunication of service dispatching unit, and transfer the optical-fiber network that outputs to the line side behind the light signal to.
When the light signal received from the business in line side, the professional pretreatment unit in line side is converted to the signal of telecommunication with this light signal, the industry of going forward side by side is engaged in separating and is converged, and outputs to the service dispatching unit again, monitors simultaneously and gives control unit with the state information report that generates;
Control unit is according to the configuration information of state information and communication network, control service dispatching unit carries out interconnection to the signal of telecommunication from the professional pretreatment unit in client's side and line side to be handled, finish service dispatching, the signal of telecommunication of the business that need terminate in this locality outputs to the professional post-processing unit of client's side, and the signal of telecommunication that other are professional outputs to the professional post-processing unit in line side;
The professional post-processing unit of client's side will be the signal of telecommunication from the electrical signal conversion of service dispatching unit, output to client's side; The professional post-processing unit in line side will carry out service convergence from the signal of telecommunication of service dispatching unit, and transfer the optical-fiber network that outputs to the line side behind the light signal to.
If what the service dispatching unit used is light intersection device, then concrete flow process is as follows:
When the light signal that is subjected to from the business in line side, comprise following steps:
The professional pretreatment unit in line side is converted to the signal of telecommunication with this light signal, carries out business and separates convergence processing, sends to the professional post-processing unit of client's side.
The professional post-processing unit of client's side is a light signal with the electrical signal conversion of receiving, sends to the service dispatching unit.
Control unit is according to the configuration data in the communication network, control service dispatching unit carries out interconnection to the light signal of receiving to be handled, finish service dispatching, the light signal of the business that need terminate in this locality is to the output of client's side, and other professional light signals send to the professional pretreatment unit of client's side.
The professional pretreatment unit of client's side is converted to the signal of telecommunication with the light signal of receiving, sends to the professional post-processing unit in line side.
The professional post-processing unit in line side carries out service convergence to the signal of telecommunication of receiving to be handled, and exports to the line side after being converted into light signal.
When the light signal received from the business of client's side, comprise following steps:
Control unit is according to the configuration data in the communication network, and control service dispatching unit carries out interconnection to this light signal to be handled, and finishes service dispatching, sends to the professional pretreatment unit of client's side.
The professional pretreatment unit of client's side is converted to the signal of telecommunication with the light signal of receiving, sends to the professional post-processing unit in line side.
The professional post-processing unit in line side carries out service convergence to the signal of telecommunication of receiving to be handled, and exports to the line side after being converted into light signal.
In the foregoing description, have at least the light wave of a wavelength to combine in the light signal from the business in line side by the multichannel service signal, these service signals include but not limited to data service such as GE, optical-fibre channel (Fibre Channel, abbreviation " FC "), business system interconnection agreement (Enterprise SystemsConnection is called for short " ESCON ") or other data services and synchronous service such as STM-1 (STM is " synchronous transfer module "), STM-4 etc.In a preferred embodiment of the present invention, the light signal list wavelength transmission speed of the business in line side is 5Gb/s, and this light signal can be merged by 4 road GE signals and form, and can be separated at this light signal of professional pretreatment unit in line side that to converge be 4 road GE signals.
Though by reference some preferred embodiment of the present invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that, can do various changes to it in the form and details, and the spirit and scope of the present invention that do not depart from appended claims and limited.
Claims (20)
1. the service dispatching device in the optical communication network is characterized in that, comprise control unit, service dispatching unit, be distributed in a plurality of professional pretreatment unit and the professional post-processing unit in client's side and line side, wherein,
The described professional pretreatment unit in line side is used to receive the light signal from the business in described line side, carries out opto-electronic conversion and a plurality of business that single wavelength carries are separated pooling a plurality of separate traffic; The described professional pretreatment unit of client's side is used to receive the light signal from the separate traffic of described client's side, carries out opto-electronic conversion; Described professional pretreatment unit also is used for the business of receiving is monitored, and gives described control unit with the state information report that monitors;
Described control unit is used for the configuration information according to described state information and described optical communication network, produces and issues control information and give described service dispatching unit;
Described service dispatching unit is used for according to described state information, carry out the scheduling of business-level to handling by interconnection from each separate traffic of described professional pretreatment unit, need output to the described professional post-processing unit of client's side in the business of this locality termination, other business output to the described professional post-processing unit in line side;
The described professional post-processing unit of client's side is used to carry out the electric light conversion and exports to described client's side; The described professional post-processing unit in line side is used to carry out service convergence and electric light is changed and exported to described line side.
2. the service dispatching device in the optical communication network according to claim 1 is characterized in that, described separate traffic is the gigabit Ethernet business.
3. the service dispatching device in the optical communication network according to claim 2 is characterized in that, described service dispatching unit adopts electricity intersection device to realize;
Adopt described device backboard cabling or cable ways of connecting realize the signal transmission between described each unit.
4. the service dispatching device in the optical communication network according to claim 2 is characterized in that, described service dispatching device is applied in the wavelength division multiplexing communications network.
5. according to the service dispatching device in any described optical communication network in the claim 1 to 4, it is characterized in that described service dispatching device is applied to communication network under the dual-homed service model; Communication network comprises the sub rate multiplexing system under the described dual-homed service model; Communication network comprises the communication network of carrying gigabit Ethernet business under the described dual-homed service model.
6. according to the service dispatching device in any described optical communication network in the claim 1 to 4, it is characterized in that having at least the light wave of a wavelength to converge in the light signal of described business from the line side and form by 4 road gigabit ethernet signals.
7. the service dispatching device in the optical communication network is characterized in that, comprise control unit, service dispatching unit, be distributed in a plurality of professional pretreatment unit and the professional post-processing unit in client's side and line side, wherein,
The described professional pretreatment unit in line side is used to receive the light signal from the business in described line side, carries out opto-electronic conversion and a plurality of business that single wavelength carries are separated pooling a plurality of separate traffic; The described professional pretreatment unit of client's side is used for the light signal from the business of described service dispatching unit is carried out opto-electronic conversion; Described professional pretreatment unit also is used for the business of receiving is monitored, and gives described control unit with the state information report that monitors;
Described control unit is used for the configuration information according to described state information and described optical communication network, produces and issues control information and give described service dispatching unit;
The described professional post-processing unit of client's side is used to receive the signal of telecommunication from the described professional pretreatment unit in line side, carries out the electric light conversion; The described professional post-processing unit in line side is used to receive the signal of telecommunication from the described professional pretreatment unit of client's side, carries out outputing to described line side after service convergence processing and the electric light conversion;
Described service dispatching unit is used for according to described control information, to from each separate traffic of the described professional post-processing unit of described client's side or client's side by the finish dealing with scheduling of business-level of interconnection, the light signal of the business that need terminate in this locality outputs to described client's side, and other professional light signals output to the described professional pretreatment unit of client's side.
8. the service dispatching device in the optical communication network according to claim 7 is characterized in that, described separate traffic is the gigabit Ethernet business.
9. the service dispatching device in the optical communication network according to claim 8 is characterized in that, described service dispatching unit adopts light intersection device to realize;
Described device adopts optical cable to realize that the signal between described each unit transmits.
10. the service dispatching device in the optical communication network according to claim 8 is characterized in that, described service dispatching device is applied in the wavelength division multiplexing communications network.
11. the service dispatching device according in any described optical communication network in the claim 7 to 10 is characterized in that described service dispatching device is applied to communication network under the dual-homed service model; Communication network comprises the sub rate multiplexing system under the described dual-homed service model; Communication network comprises the communication network of carrying gigabit Ethernet business under the described dual-homed service model.
12. the service dispatching device according in any described optical communication network in the claim 7 to 10 is characterized in that, has at least the light wave of a wavelength to be converged by 4 road gigabit ethernet signals in the light signal of described business from the line side and forms.
13. the business scheduling method in the optical communication network is characterized in that, comprises following steps:
The professional pretreatment unit of A client's side will be converted to the signal of telecommunication from the light signal of the business of client's side, and output to the service dispatching unit, monitor simultaneously and give control unit with the state information report that generates; The professional pretreatment unit in line side will be converted to the signal of telecommunication from the light signal of the business in line side, carry out business and separate and converge, and output to described service dispatching unit, monitor simultaneously and give described control unit with the state information report that generates;
The described control unit of B is according to the configuration information of described state information and described optical communication network, controlling described service dispatching unit carries out interconnection to the signal of telecommunication from the described professional pretreatment unit in client's side and line side and handles, finish service dispatching, the signal of telecommunication of the business that need terminate in this locality outputs to the professional post-processing unit of client's side, and the signal of telecommunication that other are professional outputs to the professional post-processing unit in line side;
The described professional post-processing unit of C client's side will be a light signal from the electrical signal conversion of described service dispatching unit, output to client's side; The described professional post-processing unit in line side will carry out service convergence from the signal of telecommunication of described service dispatching unit, and output to the line side after transferring light signal to.
14. the business scheduling method in the optical communication network according to claim 13 is characterized in that, described business is a gigabit Ethernet business professional or that formed by a plurality of gigabit Ethernet service convergences.
15. the business scheduling method in the optical communication network according to claim 13 is characterized in that, has at least the light wave of a wavelength to be formed by multichannel data service signal or synchronous service signal combination in the light signal of described business from the line side.
16. the business scheduling method according in any described optical communication network in the claim 13 to 15 is characterized in that, has at least the light wave of a wavelength to be converged by 4 road gigabit ethernet signals in the light signal of described business from the line side and forms.
17. the business scheduling method in the optical communication network is characterized in that, when the light signal received from the business in line side, comprises following steps:
The professional pretreatment unit in line side is converted to the signal of telecommunication with this light signal, carries out business and separates convergence processing, sends to the professional post-processing unit of client's side;
The described professional post-processing unit of client's side is a light signal with the electrical signal conversion of receiving, sends to the service dispatching unit;
Described service dispatching unit carries out interconnection to the light signal of receiving to be handled, finish service dispatching, the light signal of the business that need terminate in this locality is exported to client's side, other professional light signals are converted to the signal of telecommunication by the professional pretreatment unit of client's side, export to the line side after the professional post-processing unit by the line side carries out service convergence and is converted to light signal again;
When the light signal received from the business of client's side, comprise following steps:
Described service dispatching unit carries out interconnection to this light signal to be handled, and finishes service dispatching, sends to the described professional pretreatment unit of client's side;
The described professional pretreatment unit of client's side is converted to the signal of telecommunication with the light signal of receiving, sends to the professional post-processing unit in line side;
The described professional post-processing unit in line side carries out service convergence to the signal of telecommunication of receiving to be handled, and exports to the line side after being converted into light signal.
18. the business scheduling method in the optical communication network according to claim 17 is characterized in that, described business is a gigabit Ethernet business professional or that formed by a plurality of gigabit Ethernet service convergences.
19. the business scheduling method in the optical communication network according to claim 17 is characterized in that, has at least the light wave of a wavelength to be formed by multichannel data service signal or synchronous service signal combination in the light signal of described business from the line side.
20. the business scheduling method according in any described optical communication network in the claim 17 to 19 is characterized in that, has at least the light wave of a wavelength to be converged by 4 road gigabit ethernet signals in the light signal of described business from the line side and forms.
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| CN 200410037020 CN100488083C (en) | 2004-04-21 | 2004-04-21 | Service scheduling device in optical communication network and method thereof |
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| CN101022319B (en) * | 2007-03-16 | 2010-10-27 | 华为技术有限公司 | Dispatching device and method in optical communication network |
| CN101145857B (en) * | 2007-09-14 | 2012-01-18 | 中兴通讯股份有限公司 | A service convergence system for saving core router port |
| CN101990325B (en) | 2009-07-31 | 2013-04-24 | 华为技术有限公司 | Method, device and system for determining and maintaining QoS (Quality of Service) parameters of multi-hop network |
| CN101662427B (en) * | 2009-09-18 | 2013-01-09 | 华为技术有限公司 | Method, system and device for distributing and scheduling resource |
| US20120210028A1 (en) * | 2009-11-11 | 2012-08-16 | Zte Corporation | Service scheduling system and method, and control device |
| CN102215153B (en) | 2010-04-02 | 2014-11-05 | 华为技术有限公司 | Bandwidth control method and communication node |
| CN114696939B (en) * | 2022-03-24 | 2023-03-10 | 广州芯泰通信技术有限公司 | 200G terminal multiplexing board card supporting multi-service signals |
| CN115037378B (en) * | 2022-06-09 | 2023-06-09 | 烽火通信科技股份有限公司 | Optical interconnection method and system based on optical honeycomb |
| CN116295783A (en) * | 2023-03-09 | 2023-06-23 | 中国科学院声学研究所 | Underwater full-digital optical fiber hydrophone system suitable for remote transmission |
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