Optical network automatic configuration system and method

Abstract

The invention relates to the technical field of optical transmission device planning, in particular to an optical network automatic configuration system and method, and the system comprises a persistent layer, a resource management layer and an algorithm layer. Wherein the algorithm layer is configured to analyze and read configuration resources stored in the persistent layer through the resource management layer; and automatically performing optical device configuration and optical parameter calculation based on the configuration resource. The configuration resources comprise network topology data, configuration rules and optical device data. The optical network automatic configuration system provided by the invention can perform reasonable optical device configuration according to different configuration schemes selected by a user, has an automatic configuration function, can quickly output parameters concerned in engineering such as an OSNR value, a dispersion value and the like of each multiplexing section, can quickly check the effectiveness of network device configuration, and has a wide application prospect. The complex calculation process of manual repeated calculation and adjustment is replaced, and device configuration missing caused by data errors in manual configuration is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of optical transmission device planning, and in particular to an optical network automatic configuration system and method. Background Art

[0002] Most current optical networks use wavelength division multiplexing (WDM) technology for transmission, but the physical device structure in the network system itself will cause signal transmission damage. Therefore, the characteristics of the physical layer must be considered when planning the optical network to ensure network reliability and service quality.

[0003] Since the optical channels of wavelength division networks may be nested, manual configuration of physical devices requires repeated adjustment of physical device parameters, calculation and verification, which not only easily leads to configuration errors, but also has extremely low configuration efficiency. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the above-mentioned technology to at least a certain extent, and proposes an optical network automatic configuration system, comprising:

[0005] Persistence layer, resource management layer and algorithm layer; among them,

[0006] The algorithm layer is configured to: parse and read the configuration resources stored in the persistence layer through the resource management layer; and

[0007] Automatically configure optical devices and calculate optical parameters based on the configuration resources;

[0008] The configuration resources include: network topology data, configuration rules and optical device data.

[0009] Furthermore, the persistence layer is configured as follows:

[0010] Storing pre-written configuration resources; and

[0011] Receive and store configuration resources edited and imported by users.

[0012] Furthermore, the algorithm layer is configured as follows:

[0013] Automatically generate an optical multiplex section according to the network topology data;

[0014] Generate an optical device library according to the optical device data;

[0015] Implementing optical device configuration according to the configuration rules and user setting information;

[0016] The user setting information includes: the networking structure selected by the user, the optical device selected by the user, and the device loss information set by the user.

[0017] Furthermore, the algorithm layer is configured as follows:

[0018] When implementing optical device configuration according to the configuration rules and user setting information, the system transmitting end amplifier gain under the condition of through-wave and the system transmitting end amplifier gain under the condition of up-wave are calculated, and the maximum value of the two is taken to configure the amplifier gain.

[0019] Furthermore, the configuration rules include:

[0020] In the case of through-wave, the gain of the system transmitting end amplifier is at least greater than the sum of the insertion loss of the combiner and splitter components, pre-emphasis, single-wave power difference and the insertion loss of the transmitting end EDFA amplifier disk.

[0021] Furthermore, the configuration rules also include:

[0022] In the case of adding a voice wave, the gain of the system transmitting end amplifier is at least greater than the sum of the insertion loss of the combiner device, pre-emphasis, single-wave power difference and the insertion loss of the transmitting end EDFA amplifier disk.

[0023] Furthermore, the configuration rules include:

[0024] The sum of the system receiving end amplifier gains is greater than the sum of line attenuation, equipment insertion loss, the difference in single-wave fiber power before and after, device insertion loss and the insertion loss of the receiving end EDFA amplifier.

[0025] Furthermore, the device insertion loss includes one or more of a sum of a dispersion compensation module insertion loss and a dynamic gain equalization filter insertion loss.

[0026] Furthermore, the algorithm layer is also configured as follows:

[0027] Based on Formula 58, calculate the end-to-end optical signal-to-noise ratio or line optical signal-to-noise ratio.

[0028] The present application also proposes an optical network automatic configuration method based on the above optical network automatic configuration system, comprising:

[0029] Utilizing the algorithm layer, through the resource management layer, to parse and read the configuration resources stored in the persistence layer; and

[0030] The algorithm layer is used to automatically perform optical device configuration and optical parameter calculation based on the configuration resources.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows: the optical network automatic configuration system provided in the present application can reasonably configure optical devices according to different configuration schemes selected by users, and has an automatic configuration function, and can quickly output the OSNR value, dispersion value and other parameters of concern in the project of each multiplexing segment, and can quickly verify the validity of the network device configuration, replacing the complex calculation process of repeated calculation and adjustment by manpower, and correctly output the configuration results of the physical device, avoiding the device configuration defects caused by data errors in the manual configuration.

[0032] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings. The technical scheme of the present invention is further described below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0034] Figure 1 A schematic diagram of an optical network automatic configuration system provided in an embodiment;

[0035] Figure 2 A schematic diagram of the working principle of the optical network automatic configuration system provided in the embodiment;

[0036] Figure 3 A schematic diagram of the working principle of an optical network automatic configuration system provided by another embodiment;

[0037] Figure 4 A schematic diagram of a transmitting end amplifier of an optical network system provided in an embodiment;

[0038] Figure 5 A schematic diagram of a first optical network system transmitting end amplifier provided in an embodiment;

[0039] Figure 6 A schematic diagram of a second optical network system transmitting end amplifier provided in an embodiment;

[0040] Figure 7 A schematic diagram of a third optical network system transmitting end amplifier provided in an embodiment;

[0041] Figure 8 A schematic diagram of an optical network system including a remote pump amplifier provided in an embodiment;

[0042] Fig. 9 The following is a flow chart of OSNR calculation given in the embodiment. DETAILED DESCRIPTION

[0043] The present invention is described below in conjunction with the accompanying drawings. The preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0044] Whether the configuration of optical devices in the network is reasonable or not has a very important impact on the performance of the network. For a network of general scale, the number of optical devices configured may be hundreds or thousands. If manual configuration is adopted, it will bring a very large workload, and the adjustment of device configuration requires a series of calculations and adaptations, which may cause unsatisfactory configuration results. For large-scale networks, the configuration of optical devices will be more complicated and difficult to achieve manually. Based on the requirements of this scenario, automatic configuration of optical devices is very necessary to improve the rationality of configuration results, reduce workload, and improve efficiency. Therefore, this application provides an optical network automatic configuration system.

[0045] Figure 1 The optical network automatic configuration system provided by the present application comprises:

[0046] Persistence layer, resource management layer and algorithm layer; among them,

[0047] The algorithm layer is configured to: parse and read the configuration resources stored in the persistence layer through the resource management layer; and

[0048] Automatically configure optical devices and calculate optical parameters based on configuration resources;

[0049] Configuration resources include: network topology data, configuration rules, and optical device data.

[0050] According to some embodiments of the present application, the optical network automatic configuration system mainly includes three parts: algorithm layer, resource management layer, and persistence layer:

[0051] 1. The main function of the persistence layer is to receive customer-defined topology data and configure structured files of customized rules and optical device parameters;

[0052] 2. The resource management layer manages topology resources, ID resources, rule bases, and device bases. In addition, the resource management layer can also extract data from the persistence layer according to customer needs;

[0053] 3. The algorithm layer is the implementation of optical device configuration and optical parameter calculation. It obtains the required data and configuration rules from the resource management layer to complete configuration and simulation.

[0054] Furthermore, the persistence layer is configured to: store pre-written configuration resources; and receive and store configuration resources edited and imported by users.

[0055] According to some embodiments of the present application, Figure 2 As shown, the XML file in the persistence layer contains the optical device data pre-written by the system, and the device data can also be re-imported by business personnel externally; the configuration rules of the optical devices pre-defined by the system in the DRL file can also be edited by business personnel externally and imported into the system; before configuring the optical devices, first import the network topology data and store it in the database; then the resource management layer reads the topology resources, XML resource files and DRL resource files, and finally the algorithm layer reads the relevant resources from the cache, parses the configuration rules, completes the configuration of the optical devices, calculates the optical parameters, stores the configuration results in the database, and returns the configuration results.

[0056] Furthermore, the algorithm layer is configured to: automatically generate optical multiplexing segments based on network topology data; generate an optical device library based on optical device data; implement optical device configuration based on configuration rules and user setting information; user setting information includes: the network structure selected by the user, the optical device selected by the user, and the device loss information set by the user.

[0057] According to some embodiments of the present application, when the optical network automatic configuration system is running, the algorithm layer performs at least the following steps:

[0058] 1. Through the resource management layer, read and import the network topology from the persistence layer to automatically generate OMS (optical-multiplex-section) according to the link. When generating the network, generate the optical device library according to the preset XML file, including the supported amplifiers, optical modules and other data. At the same time, initialize the preset configuration rules;

[0059] 2. Receive the customized network structure set by the user and complete the network configuration;

[0060] 3. Receive the amplifier type and optical module selected by the user according to the needs, and receive the VOA (Variable Optical Attenuator), OSCAD disk insertion loss and other information set by the user;

[0061] 4. After receiving the automatic configuration command sent by the user, the configuration is completed by combining the selected optical module, amplifier, networking structure and pre-loaded rules;

[0062] 5. After completing the device configuration, calculate the optical parameters based on the device topology.

[0063] According to other embodiments of the present application, Figure 3As shown, the optical network automatic configuration system includes: a rule management module, a rule execution engine and a rule execution queue. The working principle of the optical network automatic configuration system given in this embodiment is as follows: (1) Import text-based rules, which can be rule language scripts or statements for business personnel; (2) The parser parses the rule text into stepRule, which refers to the set of all rules executed by a step in the business execution chain; (3) Store stepRule in the rule container according to the step category; (4) Start device configuration and input device configuration related data; (5) Call the business execution chain, first obtain the stepRule corresponding to the current step from the rule management module; (6) Input the current stepRule and the data corresponding to the current step into the rule execution engine; (7) All data required for the current step are placed in the working memory, and all rules in the current stepRule are placed in the rule base. The pattern matching algorithm matches the data in the working memory with the trigger conditions of all rules, puts the successfully matched rules into the rule execution queue, and then takes out the rules from the queue for execution; (8) The business execution chain is completed and the optical device configuration is completed.

[0064] Furthermore, the algorithm layer is configured to: when implementing the optical device configuration according to the configuration rules and the user setting information, calculate the system transmitting end amplifier gain under the through wave condition and the system transmitting end amplifier gain under the up wave condition, and take the maximum value of the two to configure the amplifier gain.

[0065] According to some embodiments of the present application, Figure 4 As shown in the figure, for a ROADM (Reconfigurable Optical Add / Drop Multiplexer) type site, the principle of configuring the system transmitting end amplifier is: amplifier gain> insertion loss of the combiner device + pre-emphasis (4db in this embodiment) + single-wave power difference + m*1db (where m is the number of EDFA amplifiers at the transmitting end). In this embodiment, for the calculation of the system transmitting end amplifier gain, both the through-wave condition and the up-wave condition are considered, and the amplifier gain is configured by taking the maximum value of the two conditions.

[0066] Furthermore, the configuration rules include: the system transmitting end amplifier gain under the condition of through-wave is at least greater than the sum of the insertion loss of the combiner / splitter device, pre-emphasis, single-wave power difference and the insertion loss of the transmitting end EDFA amplifier disk.

[0067] According to some embodiments of the present application, in the case of a through wave, the amplifier gain G1>VMUX / OMU / ODU and other wave combining and decomposing device insertion loss (including the two parts of the wave combining and decomposing) + pre-emphasis (4db in this embodiment) + max (ΔP Sλ )(ΔP Sλ Indicates the system single-mode fiber power P Sλ With FOADM input optical power P Rλ1_DThe difference) + m*1db (m is the number of EDFA amplifiers at the transmitting end).

[0068] Furthermore, the configuration rules also include: in the case of a voice wave, the system transmitting end amplifier gain is at least greater than the sum of the insertion loss of the combiner device, pre-emphasis, single-wave power difference and the insertion loss of the transmitting end EDFA amplifier disk.

[0069] According to some embodiments of the present application, in the case of a local voice channel, the amplifier gain G2>VMUX / OMU and other wave combining device insertion loss (wave combining insertion loss) + pre-emphasis (4db in this embodiment) + max (ΔP Sλ )(ΔP Sλ Indicates the system single-mode fiber power P Sλ and the module transmitting power P Rλ_m The difference) + m*1db (m is the number of EDFA amplifiers at the transmitting end).

[0070] Furthermore, the configuration rules include: the sum of the system receiving end amplifier gains is greater than the sum of the line attenuation, the equipment insertion loss, the difference in the front and rear single-wave fiber input power, the device insertion loss and the receiving end EDFA amplifier disk insertion loss.

[0071] According to some embodiments of the present application, the sum of the gain of the receiving end combined amplifier> the total line loss: line loss (including customer margin) + device insertion loss OSCAD and VOA (the default in this embodiment is 2db) + DCM (dispersion compensation module) / DGE (dynamic gain equalization filter) and other device insertion loss + ΔP Sλ (ΔP Sλ is the difference between the single-wave input fiber powers before and after) + (m-1)*1db (where m is the number of EDFA amplifiers).

[0072] Furthermore, the device insertion loss includes one or more of a sum of a dispersion compensation module insertion loss and a dynamic gain equalization filter insertion loss.

[0073] According to some embodiments of the present application, Figure 5-Figure 7 As shown, there are three configurations of the receiving end amplifier of the system, namely: no DCM / DGE exists at the receiving end, one of the DCM / DGE exists at the receiving end, and both DCM / DGE exist at the receiving end.

[0074] According to other embodiments of the present application, Figure 8 As shown, the algorithm layer is also configured to: when the optical fiber length is greater than a preset value (180km in this embodiment) and the optical fiber attenuation is greater than a preset value (50db in this embodiment), determine that the remote pump amplifier configuration conditions are met, and determine whether to perform the remote pump amplifier configuration based on the user's instructions.

[0075] Furthermore, the algorithm layer is also configured to calculate the end-to-end optical signal-to-noise ratio or the line optical signal-to-noise ratio based on Formula 58.

[0076] According to some embodiments of the present application, under the above-mentioned receiving amplifier / transmitting amplifier configuration principle, the C+L band is also supported. Since the C+L system is significantly affected by the stimulated Raman effect during transmission, the short-wave power is transferred to the long wave. Therefore, the system will consider the SRS benefit in the C+L configuration. Before configuration, the system will calculate the equivalent attenuation of the C band and the equivalent attenuation of the L band according to different optical fiber lengths.

[0077] After completing the configuration according to the above configuration principles, perform OSNR calculation under the simulated device topology, such as Fig. 9 As shown, according to the category of the optical signal-to-noise ratio Osnr, an end-to-end OAList or a line OAList can be constructed to calculate the optical signal-to-noise ratio.

[0078] The OSNR calculation of C+L is the same as that of C-band. The C and L bands are calculated using Formula 58 respectively, and the single-wavelength fiber power values ​​are calculated separately under different conditions (set by the user according to network requirements. The single-wavelength fiber power value of L in C+L network is usually higher than that of C-band). Other calculations are the same as those of C-band.

[0079] The self-noise power calculation formula is:

[0080] P aseDB =-58+101g(G lin NF lin -1)

[0081] Wherein, G is the amplifier gain, NF is the self-noise coefficient of the amplifier, and in some embodiments, for ease of calculation, “-1” in the formula is omitted.

[0082] P aseDB =-58+G+NF

[0083] Assume that the line is full wave and the power of each channel is the same, which is Ps.

[0084] For the first amplifier G1 in the line, the optical signal-to-noise ratio is calculated as follows:

[0085] P ase1DB =-58+10lg(G 1lin NF 1lin -1)

[0086] OSNR1=P s1DB -P ase1DB

[0087] For the second amplifier G2 in the line, its noise power includes Pasel from G1 and Pase2 generated by G2 itself. The calculation formula is as follows:

[0088] P ase22DB =-58+101g(G 2lin NF 2lin -1)

[0089] P ase12DB =P ase1DB -loss1+G 2DB

[0090]

[0091] OSNR2=P s2DB -P ase2DB

[0092] When calculating the final OSNR, it is necessary to connect the two OSNRs before and after. The formula is as follows:

[0093]

[0094] In summary, the algorithm layer is the main part that needs to be implemented in the optical network automatic configuration system, including optical device configuration and OSNR calculation:

[0095] (1) The automatic configuration of optical devices in the algorithm layer is to select and cache the results of each optical device in the entire network. In the process of configuring optical devices, the algorithm layer needs to read the corresponding network data, device data and rule data from the resource management layer, parse the rules, and then complete the parameter calculation of all optical devices according to the rules, and match the optical devices corresponding to the calculation results from the device data, and cache the matching results of the current device. After the optical device configuration process is completed, the configuration results of all optical devices are stored in the database.

[0096] (2) According to the system design requirements, optical device calculation is another major function of the algorithm layer, which is to perform quantitative calculations on the various properties of the network after the configuration results are completed. During the calculation, the device configuration results need to be read from the database to obtain the gain, noise figure and other data of each amplifier, and the link loss in the network, the single-wavelength input fiber power of the system and other data need to be obtained from the resource management layer to complete the calculation of OSNR, and finally the calculation results are stored in the database.

[0097] In addition, the present application also proposes an optical network automatic configuration method based on the above-mentioned optical network automatic configuration system, including: using the algorithm layer to parse and read the configuration resources stored in the persistence layer through the resource management layer; and using the algorithm layer to automatically configure optical devices and calculate optical parameters based on the configuration resources.

[0098] The beneficial effect of the above technical solution is that the optical network automatic configuration system provided in the present application can reasonably configure optical devices according to different configuration schemes selected by users, and has an automatic configuration function, and can quickly output the OSNR value, dispersion value and other parameters of concern in the project for each multiplexing segment, and can quickly verify the validity of the network device configuration, replacing the complex calculation process of repeated calculation and adjustment by manpower, and correctly output the physical device configuration results, avoiding the device configuration defects caused by data errors in manual configuration.

[0099] It is obvious that a person skilled in the art may make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. An optical network automatic configuration system, characterized in that: include: Persistence layer, resource management layer and algorithm layer; among them, The algorithm layer is configured to: parse and read the configuration resources stored in the persistence layer through the resource management layer; and Automatically configure optical devices and calculate optical parameters based on the configuration resources; The configuration resources include: network topology data, configuration rules and optical device data.

2. The optical network automatic configuration system according to claim 1, characterized in that: The persistence layer is configured as follows: Storing pre-written configuration resources; and Receive and store configuration resources edited and imported by users.

3. The optical network automatic configuration system according to claim 1, characterized in that: The algorithm layer is configured as follows: Automatically generate an optical multiplex section according to the network topology data; Generate an optical device library according to the optical device data; Implementing optical device configuration according to the configuration rules and user setting information; The user setting information includes: the networking structure selected by the user, the optical device selected by the user, and the device loss information set by the user.

4. The optical network automatic configuration system according to claim 3, characterized in that: The algorithm layer is configured as follows: When implementing optical device configuration according to the configuration rules and user setting information, the system transmitting end amplifier gain under the condition of through-wave and the system transmitting end amplifier gain under the condition of up-wave are calculated, and the maximum value of the two is taken to configure the amplifier gain.

5. The optical network automatic configuration system according to claim 4, characterized in that: The configuration rules include: In the case of through-wave, the gain of the system transmitting end amplifier is at least greater than the sum of the insertion loss of the combiner and splitter components, pre-emphasis, single-wave power difference and the insertion loss of the transmitting end EDFA amplifier disk.

6. The optical network automatic configuration system according to claim 4, characterized in that: The configuration rules also include: In the case of adding a voice wave, the gain of the system transmitting end amplifier is at least greater than the sum of the insertion loss of the combiner device, pre-emphasis, single-wave power difference and the insertion loss of the transmitting end EDFA amplifier disk.

7. The optical network automatic configuration system according to claim 3, characterized in that: The configuration rules include: The sum of the system receiving end amplifier gains is greater than the sum of line attenuation, equipment insertion loss, the difference in single-wave fiber power before and after, device insertion loss and the insertion loss of the receiving end EDFA amplifier.

8. The optical network automatic configuration system according to claim 7, characterized in that: The device insertion loss includes one or more of the sum of the dispersion compensation module insertion loss and the dynamic gain equalization filter insertion loss.

9. The optical network automatic configuration system according to claim 3, characterized in that: The algorithm layer is further configured as follows: Based on Formula 58, calculate the end-to-end optical signal-to-noise ratio or line optical signal-to-noise ratio.

10. An optical network automatic configuration method based on the optical network automatic configuration system according to any one of claims 1 to 9, characterized in that: include: Utilizing the algorithm layer, through the resource management layer, to parse and read the configuration resources stored in the persistence layer; and The algorithm layer is used to automatically perform optical device configuration and optical parameter calculation based on the configuration resources.

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