CN1156112C - Method for simulating WDM optical network - Google Patents
Method for simulating WDM optical network Download PDFInfo
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- CN1156112C CN1156112C CNB021027129A CN02102712A CN1156112C CN 1156112 C CN1156112 C CN 1156112C CN B021027129 A CNB021027129 A CN B021027129A CN 02102712 A CN02102712 A CN 02102712A CN 1156112 C CN1156112 C CN 1156112C
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Abstract
The present invention discloses a method for simulating a wavelength division multiplexing (WDM) optical network. The optical network comprises a computer. The computer has the execution steps: at least one main interface is provided; the main interface at least comprises an optical network layout drawing area and a toolbar area, wherein the toolbar area provides a system planning function which can be operated in a selected mode, a performance simulation function and an algorithm simulation function for allocating a route and a wavelength; an optical network topological graph is generated in the optical network layout drawing area by the system planning function according to planning targets of users; the optical network of the optical network layout drawing area is simulated in a dynamic performance mode by the performance simulation function; the algorithm simulation function for allocating a route and a wavelength selects an appropriate route and allocates an optimal wavelength for dynamic business in the optical network according to a physical topology or a logic topology, and the algorithm is evaluated. The present invention provides a platform with low cost and high performance for the research of the WDM optical network.
Description
Technical field
The present invention relates to a kind of analogue system that optical-fiber network is carried out emulation, particularly method for simulating WDM optical network.
Background technology
Rapid increase along with communication traffic, wavelength division multiplexing (WDM) optical transfer network is being brought into play increasing effect, simultaneously at a high speed, in the jumbo dense wave division multipurpose optical-fiber network in the research, transmission course of research, network planning design and the networking plan of research, Wavelength Assignment and the routing algorithm of research, the nonlinear effect of research, the network performance of network element device performance the differentiation situation of signal etc. all become the emphasis of research.And exist the stationarity, cost height of network, dumb, limiting factor such as efficient is low in the hardware net platform, having caused the research to the wavelength division multiplexing optical transport network more and more is the simulation that is based upon on the software platform.The research effect of software simulation in optical-fiber network is more and more important.The simulation softward of wave division multiplex optical network system progressively becomes the important tool of research wavelength division multiplexed optical network.On the other hand, the on-line monitoring of light signal is a difficult problem always, and the optics instrument costs an arm and a leg, and is difficult to support on-line monitoring.
Summary of the invention
At technological difficulties that exist in the prior art and deficiency, the invention provides a kind of method for simulating WDM optical network, can be under the network environment of complexity the transmission performance of simulating wavelength routing algorithm, network each point, and the whole network carried out system design.
The invention provides a kind of wavelength division multiplexed optical network performance simulation method, comprise digital computer, described Computer Storage has the network element device storehouse, it is characterized in that the optical network element in the described network element device storehouse is to be made of by certain concatenate rule one or more atom devices, described optical network element model is described by information structure model, and described digital computer is carried out following step:
One main interface is provided at least; Described main interface comprises an optical network configuration at least and makes map-area, component interface, the toolbar area that can operate the optical network element in the described network element device storehouse;
Described toolbar area provides the performance simulation function of alternative operation, and the optical-fiber network that described performance simulation is done the map-area to optical network configuration carries out the dynamic property simulation;
Described performance simulation step comprises:
1) in the main interface that provides, select element, set up the logic connecting relation between them, form the optical-fiber network physical topology, and initialization network element and Link State;
2) set up separately emulation priority according to the type of element;
3) according to priority successively to satisfying the network element emulation of simulated conditions, and output simulation result.
According to above-mentioned performance simulation method of the present invention, described initialization network element comprises: statistics participates in the element set of emulation, and the property parameters of the element in the set is set to default value, the element that rejecting needn't emulation.
According to above-mentioned performance simulation method of the present invention, described element emulation comprises: element is after obtaining interface parameters and structural parameters, according to the physical model of each element, the interface parameters of input is carried out simulation calculation, the interface parameters that obtains exporting by computer.
According to above-mentioned performance simulation method of the present invention, described atom device is on function the network element device of various complexity in the optical-fiber network to be carried out refinement, a class device of the least work energy unit that draws.
According to above-mentioned performance simulation method of the present invention, described network element device storehouse comprises virtual instrument, with described virtual instrument on-line monitoring is carried out in the arbitrfary point in the optical-fiber network, and exports with graphics mode and/or data file mode.
According to above-mentioned performance simulation method of the present invention, also can utilize the element in the described network element device storehouse to generate grand device arbitrarily as required, can will be somebody's turn to do the grand device of generation as one of element in the network element device storehouse.
According to above-mentioned performance simulation method of the present invention, can do the map-area by described network configuration, from component library, haul out the element of required emulation, build network configuration with line, the modified elements parameter, or call the network diagram that has disposed.
According to above-mentioned performance simulation method of the present invention, can make dynamically display simulation process of map-area by described network configuration.
According to above-mentioned performance simulation method of the present invention, described element simulated conditions is: the input link of element has data, output link not to have data and satisfies emulation priority.
The invention provides a kind of method of wave division multiplex optical network system design, comprise digital computer, described Computer Storage has the network element device storehouse, it is characterized in that the optical network element in the described network element device storehouse is to be made of by certain concatenate rule one or more atom devices, described optical network element model is described by information structure model, and described digital computer is carried out following step:
One main interface is provided at least; Described main interface comprises an optical network configuration at least and makes map-area, component interface, the toolbar area that can operate the optical network element in the described network element device storehouse;
Described toolbar area provides alternative operated system design function, and described system design provides reference configuration to required optical network system and carries out the dynamic property simulation;
Described system design step comprises: the parameter of input design object; The optical-fiber network implementation of an optimization is provided according to the system parameters of input; From described network element device storehouse, extracts the optical network element of needs, the physical topology figure of generation optical-fiber network according to the network plan of determining.
The invention provides a kind of route and Wavelength Assignment analogy method of wavelength division multiplexed optical network, comprise digital computer, it is characterized in that described digital computer carries out following step:
One main interface is provided at least; Described main interface comprises the output area that an optical network configuration is made map-area, a toolbar area, a route and Wavelength assignment algorithm result at least;
Described route and Wavelength Assignment analogy method step comprise:
1) configuration network physical topology and cellular logic topology;
2) determine relevant parameter in the business model;
3) calling route and Wavelength assignment algorithm is traffic assignments route and wavelength;
4) statistical simulation business sum and obstruction are professional total, calculate the blocking probability of this route and Wavelength assignment algorithm.
Wherein the configuration network physical topology in the step 1) comprises all nodes of collecting in the network; Determine to connect per two internodal optical fiber links; Determine the set of the wavelength that the fiber count that comprises in all optical fiber links and every optical fiber can be supported; Configuration network logical topology in the step 1) comprises determines already present service channel in the network.
The result that the present invention can make system design obtain can directly simulate in the performance simulation part, also can be to traffic assignments route and wavelength, analyze its blocking probability, and the route and the wavelength that distribute partly can be simulated at performance simulation, increased substantially the convenience of using; The present invention can be under the network environment of complexity the transmission performance of simulating wavelength routing algorithm, network each point, can analyze and diagnose the performance of the whole network, therefore, for the research of wavelength division multiplexed optical network provides a low cost and high performance platform.
Description of drawings
Fig. 1 is an information model structure chart of the present invention;
Fig. 2 is an optical-fiber network message transmission structure chart of the present invention;
Fig. 3 is a main flow chart of the present invention;
Fig. 4 is a main surface chart of the present invention;
Fig. 5 is a system design flow chart of the present invention;
Fig. 6 is the sub-interface of system design of the present invention;
Fig. 7 is system design figure as a result;
Fig. 8 is the spectrogram of optical-fiber network point;
Fig. 9 is the eye pattern of optical-fiber network point;
Figure 10 is a performance simulation flow chart of the present invention;
Figure 11 is route of the present invention and Wavelength Assignment flow chart.
Embodiment
The present invention is described in detail below in conjunction with accompanying drawing:
The optical-fiber network information structure model of the present invention's definition
The information model structure is the basis of method for simulating WDM optical network structure, is the framework of analogue system structure.It directly relates to realizability, operation efficiency, upgrading ability and the dilatation ability etc. of system.
In wavelength division multiplexing (WDM) optical transfer network, because the existence of devices such as isolator has been arranged, can regard the data flow of each device of network of flowing through as one-way flow, promptly the data of device input and output of per moment are unidirectional.Like this, device model in the WDM optical transfer network can be described as structure as shown in Figure 1, wherein MII (Model Information Interface) representative model information interface.A represents the input model parameter, and A ' represents output parameter.The intrinsic parameter that C represents physical model self relates to is called structural parameters among the present invention.The process of information processing of model can be expressed as:
A＝f(A，C)
The system transmissions process can be expressed as structure shown in Figure 2.In the IM model, each model output parameter is the input parameter of next model, so for system model, A '=A.Available same class basic parameter is gathered and is explained the input collection among the MII, and the present invention of this class basic parameter collection is called the interface parameters collection of network information model.The transmission course of signal can be regarded interface parameters as and " flow " between system model and processed process.The model-based notebook data can be divided into two types: interface parameters, structural parameters.The intrinsic parameter that model self relates to is called structural parameters, and different models have different structural parameters.Derive the class parameter that parameter B is meant that the user is concerned about and needs to extract,, monitor parameters such as transmitting signal waveform, eye pattern, power as the dateout that the user utilizes the virtual instrument monitoring model online.It is to be obtained by the interface parameters linear operation.Information interface model, interface parameters, structural parameters have been arranged, can be with the network data flow standard.
The atomic function model of the present invention's definition
Atomic function model of the present invention is all to transmit the network element equipment modeling at wavelength division multiplexed light.The atomic function model is meant that on function the network element device with various complexity in the optical-fiber network carries out refinement, draw the least work energy unit of equipment, atomic function just is meant the set of the least work energy unit that such class is basic, form the atomic function model library of optical-fiber network by it, set up its concatenate rule simultaneously.And the atom device is a class device of realizing atomic function.Arbitrary network element device all is to be made of by certain concatenate rule the atomic function model on function, structurally is made of by certain annexation the atom device.Any network element device in the optical-fiber network all is the interconnection of the subclass of atomic function model library on function.The atomic function model has an enormous advantage, its clear succinct statement the structure of various complex models inside, make model modeling oversimplified.The meaning of using the atomic function model is as follows: make software users can easily understand grand device function structure, operation principle is convenient to software and is used; The user can easily make amendment to the configuration of complex devices parameter; After the atomic function model has been arranged, can add and delete the internal structure of revising device very easily, and need not to revise software, have very strong flexibility; Can utilize any matching function device in atom model storehouse by structure; Can utilize the atomic function model library to various new device modelings, make up model, improve modeling efficiency, make software have stronger upgradability and dilatancy by software users oneself.
The present invention includes digital computer, store the network element device storehouse in computer, the optical network element in the described network element device storehouse is made of by certain concatenate rule one or more atom devices, and described optical network element model is described by information structure model.Comprise virtual instrument in the network element device storehouse, virtual instrument comprises: oscilloscope, spectrometer, eye pattern, Bit Error Rate Analyzer etc.Virtual instrument is used for on-line monitoring is carried out in the arbitrfary point in the optical-fiber network, and the structural parameters of this monitoring point are as the input of virtual instrument, and exports with figure and/or data file mode, with graphics mode output as Fig. 8, shown in Figure 9.Also can utilize the element in the described network element device storehouse to generate arbitrarily grand device simultaneously as required, also can use with convenient with the grand device that should generate as one of element in the network element device storehouse.Can do the configuration of map-area input arbitrary network or call the network diagram that has disposed by described network configuration, and display simulation process dynamically.
With reference to figure 3: step 100 starts this analogue system; Step 110 forms a main interface on computer display, described main interface comprises an optical network configuration at least and makes the toolbar area that map-area 4, can provide menu 5 and instrument 6 to the component interface 7, that the optical network element in the described network element device storehouse is operated, as shown in Figure 4, on menu 2 and instrument 3, provide system design, performance simulation, route and Wavelength Assignment analog functuion; If the option that step 120 judge to be selected is for option one then forward step 130 to, if for option 2 then forward step 140 to, if for option one 50 then forward step 150 to; Step 130 is carried out system design, and step 140 is carried out performance simulation, and step 150 is carried out route and Wavelength Assignment simulation.
Do the map-area by network configuration and also can import the arbitrary network configuration or call the network diagram that has disposed, when carrying out network analog, the simulation process is done the map-area by network configuration and is dynamically shown.
With reference to figure 4, Fig. 6, Fig. 7: step 200 forms an interface, and the user is by these interface 9 input system parameters; Step 210 is according to the parameter of input, and by the standard scheme 8 that industry standard provides an optical-fiber network to realize, the optical network configuration that is presented at main interface is done the map-area; The scheme that step 220 allows the user that the last step was provided is made amendment on demand, and modification is confirmed; Step 230 is extracted the optical network element that needs by the scheme in last step from the network element device storehouse, by connecting to form the physical topology figure of optical-fiber network; Step 240 this subsystem design operation of end.
With reference to Figure 10: the flow chart among the figure has described the performing step of performance simulation in detail.The optical-fiber network that step 300 pair will be carried out performance simulation is configured; Step 310 initialization network element and Link State comprise: component population in the computing element string, and with element and link parameter zero setting or empty, the element that rejecting needn't emulation; Step 320 need to judge whether initial assignment, if judge it is sure, then execution in step 330, if judge whether fixed then execution in step 350; Step 330 output parameter assignment and state parameter setting; Step 350 is set up the priority of emulation, and each element is equipped with emulation priority, is worth to be 1-5; J element of step 360 emulation element pointed (initial j=0); Step 370 judges whether the emulation element of going up the step satisfies simulated conditions, that is: the input link of element has data, output link not to have data and satisfies emulation priority; If judge to be sure then execution in step 380, if the then execution in step 460 of negating; Step 380 judges whether the emulation element choose is grand device, if judge to be sure then execution in step 390, if judge whether fixed then execution in step 410; Annexation in step 390 input data assignment and the definite grand device; Sub-element in the step 400 call macro device carries out the atom device simulation; Step 410 input data assignment; Step 420 judges whether to create window, if judge to be sure then execution in step 430, if judge whether fixed then execution in step 440; Step 430 is called element emulation and is sent message; Step 440 is called components and parts emulation; Step 450 output parameter assignment and state parameter setting; Step 460 makes the next element of emulation element pointed; Whether step 470 judgment component pointer has arrived element string tail, if judge whether fixed then forward step 360 to continue next element is carried out emulation, is sure then execution in step 480 if judge; Step 480 judges whether all emulation of all priority, if judging whether that fixed then priority adds forwards step 350 to and continue components and parts emulation to inferior priority after 1, is sure then execution in step 490 if judge; Step 490 judges whether to want in addition the element of emulation, if judge and to be sure then to forward step 350 to, otherwise execution in step 500; Step 500 judges whether to circulation emulation or simulation accuracy are not enough, if judge and be sure then forward step 320 to from new emulation, otherwise execution in step 501 finishes emulation.
Figure 11 has described the performing step of route and Wavelength assignment algorithm simulation in detail: step 510 pair network physical topology is configured; Step 515 pair cellular logic topology is configured; Step 520 is carried out function selecting and is judged that distribute route and wavelength if be chosen as specific transactions, then execution in step 525, if calculate route and Wavelength Assignment (RWA) blocking probability then execution in step 530; Step 525 is called route and Wavelength Assignment (RWA) algorithm, is route and the best wavelength of distribution that specific service selection is optimized, and route and ripple bar allocation algorithm can be of the prior art any; Step 535 judges whether to be that this specific transactions distributes route and wavelength, if judge to be sure then execution in step 540, if judge whether fixed then execution in step 545; This business obstruction of step 545 prompting forwards step 590 then to; Step 540 is shown as the road and the wavelength of this traffic assignments; Step 555 judges whether to carry out transport layer performance simulation, if judge to be sure then execution in step 565, if judge whether fixed then execution in step 590; All node structures of step 565 input logic topology; Physical connection relation between step 575 input node; Step 580 performance simulation software generates the physics topological diagram and carries out emulation; Step 590 finishes this time route and Wavelength Assignment; Step 530 determines to call out artificial service sum, professional arrival rate and average service time; The current all business of step 550 traversal judge whether it arrives service time, if judge to be sure then execution in step 560, otherwise forward step 570 to; Step 560 is removed the business that arrives service time; Step 570 produces equally distributed many business of sourcesink node by Poisson distribution; Step 585 calls route and ripple bar allocation algorithm is I bar traffic assignments route and wavelength (initial I=1); Step 595 judges whether to distribute route and wavelength, if judge to be sure then execution in step 600, if judge whether fixed then execution in step 610; Step 600 will be blocked professional sum increase by 1 and be forwarded step 610 then to; Whether many business that step 610 determining step 570 produces have all distributed route and wavelength, if judge whether fixed then take off a business and forward step 585 to, otherwise execution in step 615; Step 615 judges whether total professional number reaches initial requirement, if judge whether fixed then forward step 570 to, is sure then execution in step 620 if judge; Step 620 statistical service blocking probability; Step 625 finishes this calculating.
The above only is the concrete real mode of the best of the present invention, and implementation method of the present invention is not limited thereto, and any change that does not break away from field of the present invention under the spirit of the present invention all should be contained within the scope of the present invention.
Claims (13)
1, a kind of wavelength division multiplexed optical network performance simulation method, comprise digital computer, described Computer Storage has the network element device storehouse, it is characterized in that the optical network element in the described network element device storehouse is to be made of by certain concatenate rule one or more atom devices, described optical network element model is described by information structure model, and described digital computer is carried out following step:
One main interface is provided at least; Described main interface comprises an optical network configuration at least and makes map-area, component interface, the toolbar area that can operate the optical network element in the described network element device storehouse;
Described toolbar area provides the performance simulation function of alternative operation, and the optical-fiber network that described performance simulation is done the map-area to optical network configuration carries out the dynamic property simulation;
Described performance simulation step comprises:
1) in the main interface that provides, select element, set up the logic connecting relation between them, form the optical-fiber network physical topology, and initialization network element and Link State;
2) set up separately emulation priority according to the type of element;
3) according to priority successively to satisfying the network element emulation of simulated conditions, and output simulation result.
2, wavelength division multiplexed optical network performance simulation method according to claim 1, it is characterized in that: described initialization network element comprises: statistics participates in the element set of emulation, the property parameters of element in the set is set to default value, the element that rejecting needn't emulation.
3, wavelength division multiplexed optical network performance simulation method according to claim 1, it is characterized in that: described element emulation comprises: element is after obtaining interface parameters and structural parameters, physical model according to each element, by computer the interface parameters of input is carried out simulation calculation, the interface parameters that obtains exporting.
4, wavelength division multiplexed optical network performance simulation method according to claim 1 is characterized in that described atom device is on function the network element device of various complexity in the optical-fiber network to be carried out refinement, a class device of the least work energy unit that draws.
5, wavelength division multiplexed optical network performance simulation method according to claim 1, it is characterized in that described network element device storehouse comprises virtual instrument, with described virtual instrument on-line monitoring is carried out in the arbitrfary point in the optical-fiber network, and export with graphics mode and/or data file mode.
6, wavelength division multiplexed optical network performance simulation method according to claim 1 is characterized in that utilizing as required the element in the described network element device storehouse to generate grand device arbitrarily, can will be somebody's turn to do the grand device of generation as one of element in the network element device storehouse.
7, wavelength division multiplexed optical network performance simulation method according to claim 1, it is characterized in that: can do the map-area by described network configuration, from component library, haul out the element of required emulation, build network configuration with line, the modified elements parameter, or call the network diagram that has disposed.
8, wavelength division multiplexed optical network performance simulation method according to claim 1 is characterized in that: make dynamically display simulation process of map-area by described network configuration.
9, wavelength division multiplexed optical network performance simulation method according to claim 1, it is characterized in that described element simulated conditions is: the input link of element has data, output link not to have data and satisfies emulation priority.
10, the method for the multiple all optical network system designs of a kind of wavelength-division, comprise digital computer, described Computer Storage has the network element device storehouse, it is characterized in that the optical network element in the described network element device storehouse is to be made of by certain concatenate rule one or more atom devices, described optical network element model is described by information structure model, and described digital computer is carried out following step:
One main interface is provided at least; Described main interface comprises an optical network configuration at least and makes map-area, component interface, the toolbar area that can operate the optical network element in the described network element device storehouse;
Described toolbar area provides alternative operated system design function, and described system design provides reference configuration to required optical network system and carries out the dynamic property simulation;
Described system design step comprises: the parameter of input design object; The optical-fiber network implementation of an optimization is provided according to the system parameters of input; From described network element device storehouse, extracts the optical network element of needs, the physical topology figure of generation optical-fiber network according to the network plan of determining.
11, a kind of route of wavelength division multiplexed optical network and Wavelength Assignment analogy method comprise digital computer, it is characterized in that described digital computer carries out following step:
One main interface is provided at least; Described main interface comprises the output area that an optical network configuration is made map-area, a toolbar area, a route and Wavelength assignment algorithm result at least;
Described route and Wavelength Assignment analogy method step comprise:
1) configuration network physical topology and cellular logic topology;
2) determine relevant parameter in the business model;
3) calling route and Wavelength assignment algorithm is traffic assignments route and wavelength;
4) statistical simulation business sum and obstruction are professional total, calculate the blocking probability of this route and Wavelength assignment algorithm.
12, the route of a kind of wavelength division multiplexed optical network according to claim 11 and Wavelength Assignment analogy method is characterized in that: the configuration network physical topology in the step 1) comprises all nodes of collecting in the network; Determine to connect per two internodal optical fiber links; Determine the set of the wavelength that the fiber count that comprises in all optical fiber links and every optical fiber can be supported; Configuration network logical topology in the step 1) comprises determines already present service channel in the network.
13, the route of a kind of wavelength division multiplexed optical network according to claim 11 and Wavelength Assignment analogy method, it is characterized in that: step 2) in business model for obeying the business model of Poisson distribution, relevant parameter comprises system emulation time, the professional time of advent, average service time.
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| CNB021027129A CN1156112C (en) | 2002-01-24 | 2002-01-24 | Method for simulating WDM optical network |
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| CNB021027129A CN1156112C (en) | 2002-01-24 | 2002-01-24 | Method for simulating WDM optical network |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100407665C (en) * | 2005-07-19 | 2008-07-30 | 中兴通讯股份有限公司 | Analogue method based on custom-made multiple type net element |
| US8200084B2 (en) * | 2007-11-01 | 2012-06-12 | Futurewei Technologies, Inc. | Encoding for information needed for routing and wavelength assignment in wavelength switched optical networks |
| CN101409596B (en) * | 2008-11-28 | 2012-09-05 | 清华大学 | Method for planning dynamic business wavelength route optical network |
| CN101795425B (en) * | 2010-03-23 | 2012-10-24 | 上海大亚科技有限公司 | Gigabit passive optical network (GPON) service management system based on OMCI (Operation Management Communication Interface) entity relationship model |
| CN101944150B (en) * | 2010-09-17 | 2013-12-25 | 烽火通信科技股份有限公司 | Method for automatically generating wave channel graph by programming in wavelength division system |
| CN107508692B (en) * | 2016-06-14 | 2022-12-06 | 中兴通讯股份有限公司 | Communication system design method, device and communication system |
| CN107257256B (en) * | 2017-05-03 | 2019-11-15 | 中通服咨询设计研究院有限公司 | A kind of WSON network planning plan-validation method |
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