Optical fiber wavelength division multiplexing transmission method and system with adjustable coherent light wavelength

Abstract

The invention relates to an optical fiber wavelength division multiplexing transmission method and system with adjustable coherent light wavelength, and relates to the field of wavelength transmission, each coherent light communication device collects service characteristic parameters, identifies service types and reports wavelength application requirements, and a network controller plans and generates an allocation scheme in combination with the whole network wavelength resource state. The method solves the problems that wavelength allocation and management are lack of flexibility and intelligence, are difficult to quickly adapt to network changes, service requirement adjustment and fault recovery, and are difficult to realize data transmission. The invention solves the technical problems of low transmission efficiency and influence on network stability and reliability caused by the fact that the existing optical fiber wavelength division multiplexing system is low in transmission efficiency, effectively improves the flexibility and intelligence of wavelength distribution, can dynamically adapt to network change and service requirements, ensures efficient and stable data transmission, and improves the overall performance and reliability of the optical fiber wavelength division multiplexing system.

Description

Technical Field

[0001] The present invention relates to the field of wavelength transmission, and in particular to an optical fiber wavelength division multiplexing transmission method and system with adjustable coherent light wavelength. Background Art

[0002] With the rapid development of internet technology, data traffic has exploded, especially in long-haul networks between data centers and at the aggregation and access layers of metropolitan area networks (MANs). Traditional fiber optic transmission technology is no longer able to meet the current requirements for high-capacity, high-speed, and low-latency transmission. Wavelength division multiplexing (WDM) technology, as a method for efficiently utilizing optical fiber bandwidth, significantly increases optical fiber transmission capacity by simultaneously transmitting multiple optical signals of different wavelengths along the same fiber.

[0003] However, in existing wavelength division multiplexing systems, the allocation and management of optical wavelengths often rely on manual configuration or preset fixed wavelengths, lacking flexibility and intelligence. When the network topology changes, business needs adjust, or fiber links fail, existing methods struggle to quickly adapt and reallocate wavelength resources, resulting in low transmission efficiency and even affecting the stability and reliability of the entire network. In addition, with the maturity of coherent optical communication technology, it is able to achieve efficient and low-bit-error-rate data transmission over a wider spectrum range through complex digital signal processing (DSP) and advanced modulation techniques. However, coherent optical communication systems place higher demands on the precise management and dynamic allocation of wavelength resources, and existing wavelength allocation methods are no longer able to meet these requirements. Summary of the Invention

[0004] The present invention addresses the technical problems in the existing technology, such as the lack of flexibility and intelligence in wavelength allocation and management, the difficulty in quickly adapting to network changes, business demand adjustments and fault recovery, resulting in low transmission efficiency and affecting network stability and reliability. It provides a fiber-optic wavelength division multiplexing transmission method and system with adjustable coherent light wavelength to solve the problem.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: In a first aspect, the present invention provides a coherent optical wavelength tunable optical fiber wavelength division multiplexing transmission method, which is applied to a coherent optical communication equipment network, wherein the coherent optical communication equipment network includes a network controller and multiple coherent optical communication equipment, each of which has a tunable laser, and the method includes: each of the coherent optical communication equipment collects service characteristic parameters of the data to be transmitted, identifies the data service type according to the service characteristic parameters, determines the transmission demand parameters, and reports the wavelength application requirements to the network controller; the network controller collects the wavelength application requirements of each of the coherent optical communication equipment, and performs wavelength planning for the entire network in combination with the wavelength resource status of the entire network. The invention relates to a method for transmitting optical signals to a coherent optical communication device through a network controller, wherein the network controller generates a wavelength allocation plan for the whole network, wherein the wavelength allocation plan for the whole network includes multiple coherent optical wavelengths allocated to each of the coherent optical communication devices; performing wavelength conflict detection on the multiple coherent optical wavelengths, and if there is no wavelength conflict, determining a coherent modulation format and a digital signal processing parameter according to the channel quality of each of the coherent optical wavelengths; the network controller sends a wavelength configuration instruction to each of the coherent optical communication devices according to the multiple coherent optical wavelengths, and each of the coherent optical communication devices controls a corresponding tunable laser to adjust to a specified wavelength according to the corresponding coherent optical wavelength, and performs data transmission according to the determined coherent modulation format and digital signal processing parameters.

[0006] In a second aspect, the present invention provides a coherent optical wavelength tunable optical fiber wavelength division multiplexing transmission system, which is applied to a coherent optical communication equipment network, wherein the coherent optical communication equipment network includes a network controller and multiple coherent optical communication equipment, each of which has a tunable laser, and the system includes: a parameter determination module, which is used for each of the coherent optical communication equipment to collect service characteristic parameters of the data to be transmitted, identify the data service type according to the service characteristic parameters, determine the transmission demand parameters, and report the wavelength application demand to the network controller; a demand collection module, which is used for the network controller to collect the wavelength application demand of each of the coherent optical communication equipment, and perform wavelength planning for the entire network in combination with the wavelength resource status of the entire network. A plan is provided for generating a wavelength allocation plan for the entire network, wherein the wavelength allocation plan for the entire network includes multiple coherent optical wavelengths allocated to each of the coherent optical communication devices; a conflict detection module is used to perform wavelength conflict detection on the multiple coherent optical wavelengths, and if there is no wavelength conflict, the coherent modulation format and digital signal processing parameters are determined according to the channel quality of each of the coherent optical wavelengths; a data transmission module is used for the network controller to send wavelength configuration instructions to each of the coherent optical communication devices according to the multiple coherent optical wavelengths, and each of the coherent optical communication devices controls the corresponding tunable laser to adjust to the specified wavelength according to the corresponding coherent optical wavelength, and performs data transmission according to the determined coherent modulation format and digital signal processing parameters.

[0007] The beneficial effects of the present invention are as follows: by collecting service characteristic parameters, identifying service types and reporting wavelength application requirements through various coherent optical communication devices, the network controller plans and generates an allocation plan based on the wavelength resource status of the entire network, then performs wavelength conflict detection and determines the modulation format and processing parameters, and finally issues wavelength configuration instructions to realize data transmission, effectively improving the flexibility and intelligence of wavelength allocation, being able to dynamically adapt to network changes and service requirements, ensuring efficient and stable data transmission, and improving the overall performance and reliability of the optical fiber wavelength division multiplexing system. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The present invention provides a flow chart of a method for optical fiber wavelength division multiplexing transmission with adjustable coherent light wavelength.

[0009] Figure 2 This is a structural schematic diagram of an optical fiber wavelength division multiplexing transmission system with adjustable coherent light wavelength provided by the present invention.

[0010] Description of reference numerals: parameter determination module 11 , requirement collection module 12 , conflict detection module 13 , data transmission module 14 . DETAILED DESCRIPTION

[0011] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0012] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the specified features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0013] In the description of the present invention, the term "for example" is used to mean "used as an example, illustration or illustration". Any embodiment of the present invention described as "for example" is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is given to enable any person skilled in the art to implement and use the present invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present invention can be implemented without using these specific details. In other examples, well-known structures and processes are not elaborated in detail to avoid obscuring the description of the present invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed herein.

[0014] Example 1: like Figure 1 As shown, an embodiment of the present invention provides a coherent light wavelength tunable optical fiber wavelength division multiplexing transmission method, which is applied to a coherent optical communication device network, wherein the coherent optical communication device network includes a network controller and multiple coherent optical communication devices, each of which has a tunable laser. The method includes: S10: Each of the coherent optical communication devices collects service characteristic parameters of the data to be transmitted, identifies the data service type according to the service characteristic parameters, determines transmission requirement parameters, and reports wavelength application requirements to the network controller.

[0015] For example, coherent light refers to light that can produce stable interference between two or more light waves in the area where they meet. In coherent optical communications, the characteristics of coherent light can be utilized to achieve more accurate and efficient data transmission, because coherent light can carry more information, such as amplitude and phase, and this information can be recovered and transmitted through complex digital signal processing (DSP) technology. Wavelength division multiplexing is a technology used in optical fiber communications that allows multiple optical signals of different wavelengths to be transmitted simultaneously in the same optical fiber. Each wavelength represents an independent data channel, thereby greatly increasing the transmission capacity of the optical fiber. By adjusting the wavelength of coherent light, the wavelength resources of the entire network can be dynamically planned based on service characteristic parameters, ensuring efficient and stable data transmission in various network environments.

[0016] Specifically, the method of this solution is applied to a coherent optical communication device network, which consists of a network controller and multiple coherent optical communication devices. These devices are connected via optical fibers to form a network capable of efficiently transmitting data. The network controller is responsible for managing and coordinating wavelength allocation and resource scheduling across the entire network, while the coherent optical communication devices are responsible for the actual transmission and reception of data.

[0017] Specifically, the network controller is the core management component in the coherent optical communication equipment network. It is responsible for collecting the wavelength application requirements of each coherent optical communication device, performing network-wide wavelength planning based on the wavelength resource status of the entire network, generating a network-wide wavelength allocation plan, and issuing wavelength configuration instructions to each coherent optical communication device. The network controller is also responsible for monitoring the network status and dynamically adjusting wavelength allocation to ensure efficient operation of the network. Coherent optical communication equipment is a data transmission terminal in the network. Each coherent optical communication device has a tunable laser that can adjust the laser wavelength to a specified value according to the instructions of the network controller. Coherent optical communication equipment is also responsible for collecting the service characteristic parameters of the data to be transmitted, identifying the data service type, determining the transmission requirement parameters, and reporting the wavelength application requirements to the network controller. After receiving the wavelength configuration instructions, they will perform data transmission according to the specified coherent modulation format and digital signal processing parameters. The use of tunable lasers greatly improves the flexibility and efficiency of optical fiber wavelength division multiplexing systems, allowing the system to better adapt to network changes and service needs.

[0018] Optionally, during the specific implementation of this solution, each coherent optical communication device collects service characteristic parameters of the data to be transmitted. These characteristic parameters are key indicators reflecting the characteristics of the data service, such as data packet size, transmission rate requirements, delay sensitivity, and bit error rate tolerance. Taking video streaming services as an example, its data packets are usually large, have high requirements for transmission rate, and are more sensitive to delay. If the delay is too large, it will cause video playback to freeze. File transfer services may pay more attention to data integrity and accuracy, and have a relatively low tolerance for bit error rate. By collecting these service characteristic parameters, coherent optical communication equipment can fully understand the characteristics of the data to be transmitted.

[0019] Based on the collected service characteristic parameters, the coherent optical communication equipment then applies preset algorithms and rules to identify the data service type. Common service types include voice calls, video conferencing, data downloads, and real-time gaming, each of which has its own corresponding combination of characteristic parameters. For example, voice calls typically require smaller data packets and lower transmission rates, but also have extremely high real-time requirements. Real-time gaming, on the other hand, demands not only low latency but also high transmission rates to ensure smooth gameplay. By accurately identifying the data service type, the equipment can further clarify the specific transmission requirements of that service.

[0020] After determining the data service type, coherent optical communication equipment determines the corresponding transmission requirements based on pre-set rules for that service type. These transmission requirements cover multiple aspects, such as required bandwidth, wavelength resources, transmission power, and modulation format. For example, for high-bandwidth video conferencing services, the equipment may determine that a larger bandwidth and specific wavelength resources are required, and select an appropriate modulation format to improve transmission efficiency and reliability.

[0021] Finally, the coherent optical communication device reports its determined wavelength application requirements to the network controller. As the core management unit of the entire communication network, the network controller is responsible for coordinating and allocating network resources. By reporting wavelength application requirements, the device communicates its wavelength resource requirements to the network controller, allowing the network controller to make appropriate resource allocations based on global network conditions.

[0022] This wavelength application mechanism based on service characteristic parameters can significantly improve the utilization of network resources, ensuring that different service types can obtain resources that meet their transmission needs, thereby improving the performance and user experience of the entire coherent optical communication system, reducing transmission congestion and increased latency caused by unreasonable resource allocation, and ensuring the efficient and stable transmission of various data services.

[0023] S20: The network controller collects wavelength application requirements of each of the coherent optical communication devices, performs network-wide wavelength planning based on the network-wide wavelength resource status, and generates a network-wide wavelength allocation plan, wherein the network-wide wavelength allocation plan includes multiple coherent optical wavelengths allocated to each of the coherent optical communication devices.

[0024] Preferably, the network controller will further actively collect and obtain the wavelength application requirements reported by each coherent optical communication device. These application requirements include the wavelength resource expectations determined by each device based on the type of data service it carries and the transmission requirement parameters. For example, because a device carries high-definition video conferencing services, its application requirements may clearly indicate that wavelength resources within a specific bandwidth range need to be occupied to meet the service's requirements for high bandwidth and low latency.

[0025] After collecting wavelength application requests from all devices, the network controller simultaneously obtains network-wide wavelength resource status information. This information covers key characteristic parameters such as all available wavelength bands, occupied wavelengths, wavelength transmission loss characteristics, and interference between different wavelengths. Taking wavelength bands as an example, different wavelength bands may have different transmission performance and applicable scenarios. Some bands may be more suitable for long-distance transmission, while others may perform better in short-distance, high-density connection scenarios.

[0026] Based on collected wavelength application requests and network-wide wavelength resource status information, the network controller performs network-wide wavelength planning. This planning process considers multiple factors, such as service priority, wavelength utilization, transmission distance, and interference avoidance. For example, for high-priority, emergency services, the network controller may prioritize wavelength resources with better performance and less interference. Furthermore, to maximize wavelength utilization, the network controller will try to allocate multiple services to different wavelengths to avoid wasting wavelength resources.

[0027] After complex calculations and optimization, the network controller generates a network-wide wavelength allocation plan. This plan details the multiple coherent optical wavelengths allocated to each coherent optical communication device, specifying the specific wavelength bands each device can use. For example, the plan might specify that a device use wavelengths λ1 and λ2 for data transmission, and also specify parameters such as the transmission power and modulation format for each wavelength.

[0028] This network-wide wavelength planning and allocation mechanism, based on the network-wide wavelength resource status and device wavelength application requirements, can significantly improve the performance and resource utilization efficiency of coherent optical communication networks. On the one hand, it ensures that each device can obtain wavelength resources that meet its business needs, guarantees high-quality transmission of different service types, and reduces problems such as service interruptions and increased latency caused by insufficient wavelength resources or unreasonable allocation. On the other hand, by optimizing wavelength allocation, the utilization rate of wavelength resources across the entire network is improved, network construction and operation costs are reduced, the scalability and flexibility of the network are enhanced, and strong support is provided for future business growth and changes.

[0029] S30: Perform wavelength conflict detection on the multiple coherent optical wavelengths. If there is no wavelength conflict, determine a coherent modulation format and digital signal processing parameters according to the channel quality of each coherent optical wavelength.

[0030] Furthermore, after completing the wavelength allocation plan for the entire network and determining the multiple coherent optical wavelengths allocated to each coherent optical communication device, wavelength conflict detection needs to be performed on these wavelengths. The core of wavelength conflict detection is to check whether multiple devices are allocated to the same wavelength resource, or whether different wavelengths interfere with each other due to factors such as too small frequency spacing and signal coupling. These interferences may manifest as signal crosstalk and abnormal power fluctuations. For example, if two adjacent coherent optical communication devices are allocated to very close wavelengths and are physically close to each other, there is a high possibility that signal interference will occur due to the mutual penetration of wavelengths, resulting in an increase in data transmission error rate.

[0031] If wavelength conflicts are detected during the detection process, indicating that the current wavelength allocation scheme cannot meet the needs of normal network communication, the network controller will trigger a network-wide wavelength replanning process. This process collects wavelength application requests from each device and, based on updated network-wide wavelength resource status information, uses a more optimized algorithm to replan wavelength allocation, ensuring that each device has independent and interference-free wavelength resources.

[0032] If the wavelength conflict detection result indicates no wavelength conflict, the coherent modulation format and digital signal processing parameters are determined based on the channel quality of each coherent optical wavelength. Channel quality is a key metric for measuring wavelength transmission performance, encompassing multiple aspects such as signal-to-noise ratio (SNR), dispersion, and nonlinear effects. The SNR reflects the ratio of signal power to noise power; a higher SNR indicates better signal quality and supports higher-order modulation formats. Dispersion can cause signal pulse broadening, affecting accurate signal recognition. Nonlinear effects can introduce additional distortion during signal transmission.

[0033] Taking the signal-to-noise ratio (SNR) as an example, a high SNR for a coherent optical wavelength indicates a favorable channel environment and is suitable for higher-order modulation formats, such as 16QAM (quadrature amplitude modulation) or even 64QAM. Higher-order modulation formats can transmit more information within the same bandwidth, thereby improving spectrum utilization and data transmission rates. Conversely, if the SNR is low, a lower-order modulation format, such as QPSK (quadrature phase shift keying), may be necessary to ensure reliable signal transmission.

[0034] At the same time, digital signal processing parameters are determined based on channel quality. These include the choice of equalization algorithm and the strength of forward error correction (FEC) coding. For example, if the channel has significant dispersion, a more complex equalization algorithm will be selected to compensate for the effects of dispersion. If the channel bit error rate is high, the FEC coding strength will be increased to improve the error correction capability of data transmission.

[0035] This mechanism for determining coherent modulation formats and digital signal processing parameters based on wavelength conflict detection and channel quality can significantly improve the performance of coherent optical communication systems. On the one hand, it avoids signal interference and data transmission errors caused by wavelength conflicts, ensuring the stability and reliability of communications. On the other hand, by dynamically adjusting the modulation format and digital signal processing parameters based on channel quality, it can fully utilize the channel's transmission capacity, improve spectrum utilization and data transmission rate, and reduce bit error rate, thereby providing strong support for the efficient operation of coherent optical communication networks.

[0036] S40: The network controller sends a wavelength configuration instruction to each of the coherent optical communication devices according to the multiple coherent optical wavelengths. Each of the coherent optical communication devices controls the corresponding tunable laser to adjust to the specified wavelength according to the corresponding coherent optical wavelength, and performs data transmission according to the determined coherent modulation format and digital signal processing parameters.

[0037] Specifically, after completing wavelength conflict detection and determining the coherent modulation format and digital signal processing parameters, the network controller takes on the critical task of issuing wavelength configuration instructions to each coherent optical communication device. This wavelength configuration instruction contains the specific coherent optical wavelength information assigned to each coherent optical communication device. This wavelength information is derived after network-wide wavelength planning, conflict detection, and channel quality optimization. The goal is to ensure that each device can obtain the wavelength resource that best suits its business needs and is free of interference. For example, if a device is assigned to wavelength λ3, the wavelength configuration instruction generated by the network controller will explicitly instruct the device to use λ3 for data transmission.

[0038] After receiving the wavelength configuration instruction from the network controller, each coherent optical communication device will immediately start the corresponding control process. The control unit inside the device will parse the instruction and extract the specified coherent optical wavelength parameters. Subsequently, the device will send a control signal to the tunable laser it is equipped with. A tunable laser is a key component that can change the output wavelength according to the control signal. It has the characteristics of a wide wavelength tuning range and fast tuning speed. The device adjusts the tunable laser to the wavelength specified in the wavelength configuration instruction by precisely controlling the drive current, temperature and other parameters of the tunable laser. For example, if the instruction specifies a wavelength of λ3, the device will adjust the relevant parameters of the tunable laser to stabilize its output wavelength at λ3, and the wavelength accuracy can reach an extremely high level, usually at the picometer (pm) level, to ensure wavelength matching and communication compatibility with other devices.

[0039] After successfully tuning the tunable laser to the specified wavelength, each coherent optical communication device will perform data transmission according to the specified coherent modulation format and digital signal processing parameters. The coherent modulation format determines how digital information is encoded onto the optical carrier. Different modulation formats have different spectral efficiency and bit error rate performance. For example, if the specified coherent modulation format is 16QAM, the device will modulate the data information to be transmitted onto the optical carrier of the specified wavelength according to the 16QAM encoding rules, carrying the information by changing the amplitude and phase of the optical carrier. At the same time, the digital signal processing parameters are used to pre-process and post-process the modulated signal to improve signal transmission quality. For example, at the transmitting end, the digital signal processing unit will encode and filter the signal according to the specified parameters to enhance the signal's anti-interference capability. At the receiving end, demodulation, decoding, equalization, and other processing will be performed according to the corresponding parameters to restore the original data information.

[0040] This wavelength configuration and data transmission execution mechanism based on centralized control of the network controller ensures, on the one hand, that each coherent optical communication device can accurately and stably use the designated wavelength resources, avoiding wavelength conflicts and interference, and improving the reliability and stability of communication. On the other hand, data transmission according to the optimized coherent modulation format and digital signal processing parameters can fully utilize the transmission capacity of the channel, improve spectrum utilization and data transmission rate, and reduce bit error rate, thereby meeting the needs of different business types for high-quality and high-efficiency communication, and providing solid technical support for the large-scale deployment and efficient operation of coherent optical communication networks.

[0041] In a preferred embodiment, each of the coherent optical communication devices collects service characteristic parameters of the data to be transmitted, identifies the data service type according to the service characteristic parameters, determines the transmission requirement parameters, and reports the wavelength application requirement to the network controller, including: A data packet size, a transmission frequency, and a traffic pattern of data to be transmitted of a first coherent optical communication device are obtained as the service characteristic parameters, wherein the first coherent optical communication device is any one of a plurality of coherent optical communication devices.

[0042] The service characteristic parameters are analyzed by a service type identifier to determine the first data service type.

[0043] Determine the first transmission requirement parameter corresponding to the first data service type through a service type-transmission requirement mapping table.

[0044] The first data service type and the first transmission requirement parameter are encapsulated as a first wavelength application requirement, and the requirement is reported to the network controller.

[0045] Specifically, in a specific embodiment, during the operation of the coherent optical communication system, each coherent optical communication device needs to perform a series of operations to achieve reasonable application of wavelength resources. Taking any one of the multiple coherent optical communication devices, that is, the first coherent optical communication device as an example, it will first collect the service characteristic parameters of the data to be transmitted, specifically covering the data packet size, transmission frequency and traffic pattern. Among them, the data packet size reflects the amount of data transmitted each time. For example, the data packets of the video streaming service are usually large, while the data packets of the instant messaging service are relatively small; the transmission frequency reflects the number of data transmissions per unit time. High-frequency transmission may mean that the service has high real-time requirements; the traffic pattern describes the temporal distribution characteristics of data transmission, such as whether there is burst traffic.

[0046] After collecting the service characteristic parameters, the first coherent optical communication device analyzes these parameters using a service type identifier. The service type identifier, which has pre-set analysis models and rules, accurately determines the first data service type through comparison and calculation based on the input service characteristic parameters. For example, if the data packet is large, the transmission frequency is high, and the traffic pattern exhibits a continuous and stable characteristic, it may be identified as a real-time interactive service. However, if the data packet is extremely large, the transmission frequency is relatively low, but the amount of data transmitted each time is large, it may be determined to be a database synchronization service.

[0047] After determining the first data service type, the device will search and determine the first transmission requirement parameters corresponding to the service type through the preset service type-transmission requirement mapping table. Optionally, the first transmission requirement parameters mainly include delay requirements, bandwidth requirements, and reliability requirements. For example, the delay requirement corresponding to the real-time interactive service is less than 1ms, the bandwidth requirement is medium, and the reliability requirement is high; the delay requirement corresponding to the database synchronization service is less than 10ms, the bandwidth requirement is large, and the reliability requirement is high. The specific service type-transmission requirement mapping table can be set according to actual conditions. This solution makes the following exemplary requirement mapping table for reference.

[0048]

[0049] As can be seen from the preceding table, various services are classified into high, medium, and low priority levels based on latency, bandwidth, and reliability. These priorities can be used as a basis for determining the priorities of network service scheduling and resource allocation.

[0050] Finally, the first coherent optical communication device will encapsulate the determined first data service type and first transmission requirement parameters into a first wavelength application requirement and report it to the network controller. This process ensures that the network controller can fully understand the service requirements of each device and provide an accurate basis for subsequent wavelength resource allocation. Through this service type identification and transmission requirement determination mechanism based on service characteristic parameters, coherent optical communication equipment can accurately express its own wavelength resource requirements to the network controller, which helps to improve the efficiency and rationality of network resource allocation, reduce resource waste, and at the same time ensure that different service types can obtain resources that meet their transmission requirements, thereby improving the performance and reliability of the entire coherent optical communication system.

[0051] In a preferred embodiment, the step of constructing the service type identifier includes: Collect historical transmission data within a historical period, and extract the data packet size, transmission frequency and traffic pattern in the historical transmission data to obtain a sample transmission data set, including multiple sample transmission data, each of the sample transmission data includes a sample data packet size, a sample transmission frequency and a sample traffic pattern.

[0052] Each sample transmission data is labeled with a service type to obtain a sample service type set.

[0053] The service type identifier is trained and generated using the sample data packet size, sample transmission frequency and sample traffic pattern in the sample transmission data set as input features and the sample service type set as a supervisory signal.

[0054] Preferably, in the process of building a business type identifier, historical transmission data is first collected, and the collection scope is set within a historical period. This historical period can be reasonably defined according to actual needs and data volume, such as the past month or quarter. The collected historical transmission data contains rich information, from which key features, namely data packet size, transmission frequency and traffic pattern, are extracted to form a sample transmission data set. Each sample transmission data in the sample transmission data set consists of a sample data packet size, a sample transmission frequency and a sample traffic pattern. Taking a certain communication network as an example, the collected historical data may contain transmission data of various business types such as video conferencing, file downloading, and instant messaging. For video conferencing data, the sample data packet size is usually large, the transmission frequency is high and relatively stable; while the sample data packet size of instant messaging data is small, and the transmission frequency is intermittent.

[0055] After completing the construction of the sample transmission data set, each sample transmission data needs to be labeled with the business type to obtain the sample business type set. The labeling process needs to be based on clear business type definitions and standards, such as dividing the sample data into types such as real-time interaction, database synchronization, and VM migration. The labeling work can be completed manually by professionals or assisted by some automated tools to ensure the accuracy and consistency of the labeling. For example, sample data with obvious high frequency and small data packet characteristics can be labeled as real-time interaction type; sample data with large data volume and relatively concentrated transmission time can be labeled as database synchronization type.

[0056] Finally, the model is trained using machine learning algorithms such as decision trees, support vector machines, and neural networks, using the sample packet size, transmission frequency, and traffic patterns from the sample transmission dataset as input features and the sample service type set as supervisory signals. During training, the model continuously adjusts its parameters and structure to minimize the error between the predicted results and the actual service type. After multiple iterations of training and optimization, a service type identifier is generated. This identifier has strong generalization capabilities and can quickly and accurately identify the service type of new, unknown transmission data.

[0057] Through this construction method based on a large amount of historical data and supervised learning, the service type identifier can effectively capture the characteristic differences of different service types in terms of packet size, transmission frequency, and traffic pattern, thereby improving the accuracy and efficiency of service type identification, providing a reliable basis for the subsequent determination of transmission demand parameters and the reasonable allocation of wavelength resources, thereby improving the performance and resource utilization of the entire coherent optical communication system.

[0058] In a preferred embodiment, the network controller collects wavelength application requirements of each of the coherent optical communication devices, performs network-wide wavelength planning based on the wavelength resource status of the entire network, and generates a network-wide wavelength allocation plan, wherein the network-wide wavelength allocation plan includes multiple coherent optical wavelengths allocated to each of the coherent optical communication devices, including: The wavelength constraints of each of the coherent optical communication devices are obtained, and an initial wavelength configuration space is constructed based on the wavelength constraints.

[0059] An allocated wavelength is acquired according to the wavelength resource status of the entire network, and the allocated wavelength is set as a taboo wavelength in the wavelength configuration space to obtain a current wavelength configuration space.

[0060] Based on the wavelength application requirements of each of the coherent optical communication devices, the initial allocated wavelength of each of the coherent optical communication devices is configured.

[0061] A wavelength conflict detection is performed on the initial allocated wavelength of each of the coherent optical communication devices in the current wavelength configuration space. If there is no conflicting wavelength, the initial allocated wavelength of each of the coherent optical communication devices is used as the multiple coherent optical wavelengths.

[0062] If conflicting wavelengths exist, network-wide wavelength iterative optimization is performed in the current wavelength configuration space according to the initial allocated wavelengths of each coherent optical communication device to obtain multiple coherent optical wavelengths and generate the network-wide wavelength allocation solution.

[0063] Furthermore, during the wavelength allocation process, the network controller obtains the wavelength constraints of each coherent optical communication device. These wavelength constraints include the wavelength tuning range of the device's tunable laser and the interference level of the device's environment on specific wavelengths. Based on these wavelength constraints, an initial wavelength configuration space is constructed, which covers all possible wavelength combinations that can be assigned to each coherent optical communication device. For example, if a device's tunable laser has a tuning range of 1530nm-1565nm, the initial wavelength configuration space will include multiple discrete wavelength options within this range.

[0064] Next, the system retrieves the allocated wavelengths based on the network-wide wavelength resource status. These wavelengths are previously assigned to other devices and are still in use. In the initial wavelength configuration space, these wavelengths are set as forbidden wavelengths, resulting in the current wavelength configuration space. This step prevents conflicts between newly allocated wavelengths and already in use, ensuring the uniqueness and validity of wavelength assignments.

[0065] Subsequently, based on the wavelength application requirements of each coherent optical communication device, namely the first wavelength application requirements encapsulating the first data service type and the first transmission requirement parameters, the starting allocated wavelength of each coherent optical communication device is configured. Initialization is performed using historical experience, which can come from wavelength allocation records for similar service types and transmission requirements. By drawing on historical experience, the blindness of random initialization can be avoided, providing a good starting point for wavelength allocation. For example, for real-time interactive services, if a specific wavelength has historically achieved good transmission results, then this wavelength can be prioritized as the starting allocated wavelength in this allocation.

[0066] After obtaining the starting wavelength allocation, the network controller performs a wavelength conflict check on the starting wavelength allocation of each coherent optical communication device within the current wavelength configuration space. If the test results show no conflicting wavelengths, it means that the current starting wavelength allocation can meet the wavelength requirements of each device without causing interference. In this case, the starting wavelength allocation of each coherent optical communication device can be used as the final multiple coherent optical wavelengths.

[0067] If conflicting wavelengths exist, this means the current starting wavelength allocation cannot meet the conflict-free allocation requirements for all devices. In this case, the network controller performs iterative wavelength optimization across the entire network within the current wavelength configuration space based on the starting wavelength allocations of each coherent optical communication device. This iterative optimization process comprehensively considers each device's wavelength application requirements, wavelength constraints, and the overall wavelength resource status of the network. By continuously adjusting and swapping wavelength allocations, the optimal wavelength allocation solution is sought. After multiple iterations, multiple coherent optical wavelengths are obtained, and a network-wide wavelength allocation solution is generated.

[0068] This wavelength planning and allocation mechanism, based on wavelength constraints, historical experience initialization, and iterative optimization, significantly improves the efficiency and rationality of wavelength allocation. Utilizing historical experience initialization avoids the multiple invalid attempts that can result from random initialization, accelerating the optimization process. Wavelength conflict detection and iterative optimization ensure that the final assigned wavelength meets the transmission requirements of each device while avoiding wavelength conflicts. This improves the transmission efficiency and stability of data across the entire network, providing a strong guarantee for the efficient operation of coherent optical communication networks.

[0069] In a preferred embodiment, configuring the starting allocated wavelength of each of the coherent optical communication devices based on the wavelength application requirements of each of the coherent optical communication devices includes: For each wavelength application requirement of the coherent optical communication device, matching historical application records are retrieved from the historical wavelength allocation database.

[0070] The historical application records include historical data service types, historical transmission demand parameters and corresponding historical allocated wavelengths, as well as corresponding historical transmission effects.

[0071] A performance evaluation is performed on each historically allocated wavelength according to the historical transmission effect, and the historically allocated wavelength with the best performance evaluation result is selected as the starting allocated wavelength corresponding to the current wavelength application requirement.

[0072] Specifically, the process of configuring the initial wavelength allocation for each coherent optical communication device is based on the wavelength application requirements of each device. Specifically, for each coherent optical communication device's wavelength application requirements, which include the determined data service type and transmission requirement parameters, the system searches the historical wavelength allocation database for matching historical application records.

[0073] The historical wavelength allocation database stores a wealth of information related to past wavelength allocations. Each historical application record details the historical data service type, historical transmission requirement parameters, the corresponding historically allocated wavelength, and the historical transmission performance corresponding to that wavelength allocation. Examples of historical data service types include real-time interaction and database synchronization; historical transmission requirement parameters include latency, bandwidth, and reliability requirements; historically allocated wavelengths represent the specific wavelengths allocated to meet these service requirements; and historical transmission performance is measured using a series of metrics, such as bit error rate, transmission rate, and signal strength.

[0074] For example, consider a wavelength application request for coherent optical communication equipment. For example, if the data service type is real-time interaction and the transmission requirements are latency less than 1ms, medium bandwidth, and high reliability, the system searches the historical wavelength allocation database for similar historical application records. Multiple records may be found, some of which also have real-time interaction as the historical data service type and transmission requirement parameters that closely match the current application.

[0075] After retrieving matching historical application records, a performance evaluation is conducted on each historically allocated wavelength based on historical transmission performance. This performance evaluation considers multiple metrics. For example, if a historically allocated wavelength demonstrated a low bit error rate, high transmission rate, and stable signal strength, its performance evaluation result is considered good. By quantitatively evaluating and ranking all matching historically allocated wavelengths, the historically allocated wavelength with the best performance evaluation result is determined. Finally, the historically allocated wavelength with the best performance evaluation result is selected as the starting wavelength for the current wavelength application request.

[0076] This initial wavelength allocation method, based on historical application records and performance evaluations, leverages past wavelength allocation experience and transmission performance data, avoiding the blindness and uncertainty that can arise from random wavelength allocation. It provides a good starting point for wavelength allocation, improving its efficiency and accuracy, and reducing the workload of subsequent wavelength conflict detection and iterative optimization, thereby improving the speed and quality of wavelength allocation across the entire coherent optical communication network and ensuring efficient and stable data transmission.

[0077] In a preferred embodiment, if there are conflicting wavelengths, performing iterative network-wide wavelength optimization in the current wavelength configuration space based on the initial allocated wavelengths of each of the coherent optical communication devices to obtain multiple coherent optical wavelengths and generate the network-wide wavelength allocation scheme includes: At the initial allocated wavelength of each of the coherent optical communication devices, conflicting coherent optical wavelengths are identified to obtain a conflicting wavelength set and a corresponding conflicting device set.

[0078] For each conflicting wavelength in the conflicting wavelength set, one conflicting device in the conflicting device set is fixed to use the conflicting wavelength in turn, and available wavelengths are reselected from the current wavelength configuration space for the remaining conflicting devices to generate multiple candidate wavelength allocation schemes.

[0079] A network-wide performance evaluation function is obtained, and a performance evaluation is performed on each of the candidate wavelength allocation schemes to obtain a network-wide performance score for each candidate wavelength allocation scheme.

[0080] The candidate wavelength allocation scheme with the highest performance score in the entire network is selected as the wavelength allocation scheme for the entire network.

[0081] For example, when conflicting wavelengths are detected during the wavelength allocation process, iterative wavelength optimization is performed across the entire network to generate a final wavelength allocation plan. First, conflicting coherent optical wavelengths are identified based on the initial assigned wavelengths of each coherent optical communication device. This results in a conflicting wavelength set and a corresponding conflicting device set. For example, if device A and device B are both assigned wavelength λ1, then λ1 belongs to the conflicting wavelength set, and devices A and B constitute the corresponding conflicting device set.

[0082] For each conflicting wavelength in the conflicting wavelength set, the following steps are performed: One conflicting device in the conflicting device set is fixed to use the conflicting wavelength in turn, and then available wavelengths are reselected from the current wavelength configuration space for the remaining conflicting devices, thereby generating multiple candidate wavelength allocation schemes. Taking conflicting wavelength λ1 and the conflicting device set {device A, device B} as an example, device A is first fixed to use wavelength λ1, and an available wavelength is selected for device B from the current wavelength configuration space, excluding λ1 and the assigned taboo wavelengths. Assuming the available wavelengths are λ2 and λ3, two candidate wavelength allocation schemes are generated: Scheme 1: Device A uses λ1 and device B uses λ2; Scheme 2: Device A uses λ1 and device B uses λ3. If there are multiple conflicting wavelengths, this process is repeated, effectively enumerating all possible wavelength allocation combinations.

[0083] Next, obtain the network-wide performance evaluation function. This function comprehensively considers multiple factors to evaluate the pros and cons of wavelength allocation schemes. These factors may include network-wide transmission delay, bandwidth utilization, bit error rate, etc. For example, a simple network-wide performance evaluation function can be: Network-wide performance score = α × (1 / network-wide average transmission delay) + β × bandwidth utilization - γ × bit error rate, where α, β, and γ are weight coefficients that can be adjusted according to actual needs. Use the network-wide performance evaluation function to evaluate the performance of each candidate wavelength allocation scheme and obtain a network-wide performance score for each scheme. Finally, select the scheme with the highest network-wide performance score from all candidate wavelength allocation schemes as the final network-wide wavelength allocation scheme.

[0084] This iterative optimization method, based on conflicting wavelength identification, candidate solution generation, and performance evaluation, comprehensively and systematically searches for all possible wavelength allocation combinations, ensuring that the resulting wavelength allocation solution not only meets conflict-free requirements but also optimizes overall network performance. This method effectively improves the rationality of wavelength allocation and the efficiency of network resource utilization, ensuring the efficient and stable operation of coherent optical communication networks and reducing the probability of network congestion and transmission errors.

[0085] In a preferred embodiment, the network-wide performance evaluation function is: ; ; ; ;in, Score the performance of the entire network. 、 、 is the weight coefficient and ; is the business priority satisfaction, is the channel quality utilization, is the wavelength resource balance; is the weight coefficient of the i-th level priority service, The number of successful allocations for priority level i services, is the quality satisfaction coefficient of the i-th level priority service, is the total number of applications for priority services at level i, is the priority number; is the actual transmission capacity of wavelength j, is the channel quality coefficient of wavelength j, is the number of wavelengths; is the standard deviation of the load factor at each wavelength, is the average value of the load factor at each wavelength.

[0086] Specifically, in order to evaluate the full network performance of the coherent optical communication network, a specific full network performance evaluation function is adopted: .in, 、 、 is the weight coefficient and satisfies , which is used to adjust the importance of different performance indicators in the overall network performance score. P represents the service priority satisfaction, and its calculation involves multiple factors. First, based on the data service type and transmission requirement parameters of each conflicting device, namely the delay requirement, bandwidth requirement, and reliability requirement, the service priority level of each conflicting device can be determined. The service priority can be determined by referring to the exemplary demand mapping table. Satisfaction = Σ(number of high-priority services satisfied × weight) / Σ(total number of high-priority services requested × weight). For example, if the high-priority service weight is 3, 5 applications are made, and 4 are satisfied, the contribution is 4×3 / 5×3=0.8; if the medium-priority service weight is 2, 10 applications are made, and 8 are satisfied, the contribution is 8×2 / 10×2=0.8; if the low-priority service weight is 1, 20 applications are made, and 15 are satisfied, the contribution is 15×1 / 20×1=0.75, and the total satisfaction is (0.8×3+0.8×2+0.75×1) / (3+2+1)=0.775. Here, high, medium, and low priorities can also be represented as priority level 1, priority level 2, and priority level 3. U represents the channel quality utilization, calculated as utilization = ∑(actual transmission capacity of the assigned wavelength) / ∑(theoretical maximum capacity of the assigned wavelength). For example, if λ1 has an OSNR of 25dB, a theoretical capacity of 400G, and actual transmission of 200G, the utilization is 50%; λ2 has an OSNR of 20dB, a theoretical capacity of 200G, and actual transmission of 180G, the utilization is 90%; λ3 has an OSNR of 15dB, a theoretical capacity of 100G, and actual transmission of 100G, the utilization is 100%. The total utilization is (200 + 180 + 100) / (400 + 200 + 100) = 480 / 700 = 68.6%. B represents the wavelength resource balance, calculated as B = 1 - σ / μ, where σ is the standard deviation of the load factor of each wavelength and μ is the average load factor of each wavelength. For example, if λ1 is loaded at 80%, λ2 at 60%, and λ3 at 90%, the average load μ = (80 + 60 + 90) / 3 = 76.7%, and the standard deviation σ 2 =((80-76.7) 2 +(60-76.7) 2 +(90-76.7) 2 ) / 3, σ=12.5, and the equalization degree B=1-12.5 / 76.7=0.837. In addition, the channel quality coefficient Q of wavelength j is j Based on OSNR calculation, the value range is 0-1, and the calculation formula is Q j =min(1,OSNR j / OSNR threshold ). Load rate L of wavelength j j =C j / C max,j , where C j is the actual transmission capacity of wavelength j, Cmax,j is the theoretical maximum capacity of wavelength j.

[0087] By calculating this network-wide performance evaluation function and its associated parameters, we can comprehensively and accurately assess the impact of wavelength allocation schemes on network performance. During the iterative wavelength optimization process, this evaluation function is used to evaluate the performance of each candidate wavelength allocation scheme, and the scheme with the highest overall performance score is selected as the final network-wide wavelength allocation scheme. This effectively improves network resource utilization, guarantees service transmission quality, and enhances overall network performance and stability. This ensures that different service types receive resources that meet their transmission needs, reducing the probability of network congestion and transmission errors.

[0088] The embodiment of the present invention provides a method for optical fiber wavelength division multiplexing transmission with tunable coherent light wavelength, which has at least the following technical effects: 1. By building a service type identifier and training it using features such as packet size, transmission frequency, and traffic patterns from historical transmission data, it can accurately identify the service type of the data to be transmitted. Combined with the service type-transmission demand mapping table, the corresponding transmission demand parameters can be quickly determined. This data-driven service type identification and demand matching method avoids the subjectivity and uncertainty of manual judgment, improves the accuracy and efficiency of service type identification, ensures the rationality of wavelength application requirements, and provides a reliable basis for subsequent wavelength allocation, thereby improving the resource utilization efficiency of the entire network.

[0089] 2. After collecting the wavelength application requirements of various coherent optical communication devices, the network controller conducts comprehensive wavelength planning based on the wavelength resource status of the entire network. First, it constructs the initial wavelength configuration space based on wavelength constraints and sets the allocated wavelengths as taboo wavelengths to avoid wavelength conflicts. By initializing the starting allocated wavelengths based on historical experience, it provides a good starting point for wavelength allocation and reduces the blindness of random initialization. When there are conflicting wavelengths, the network-wide wavelength iterative optimization method is adopted to generate multiple candidate wavelength allocation schemes. These are evaluated using the network-wide performance evaluation function and the scheme with the best performance is selected as the final allocation scheme. This mechanism effectively solves the wavelength conflict problem, improves the rationality and global optimality of wavelength allocation, and ensures stable operation and efficient transmission of the network.

[0090] 3. The designed full-network performance evaluation function comprehensively considers multiple key factors, including service priority satisfaction, channel quality utilization, and wavelength resource balance. Service priority satisfaction ensures that high-priority services are given priority and meets the differentiated transmission quality requirements of different services; channel quality utilization improves the efficiency of wavelength use and fully utilizes the transmission capacity of the channel; wavelength resource balance avoids excessive concentration or idleness of wavelength resources and achieves balanced resource allocation. Through this evaluation function, a comprehensive evaluation of candidate wavelength allocation schemes can be performed to select the scheme with the best overall performance, thereby improving the overall performance and service quality of the entire coherent optical communication equipment network.

[0091] Example 2: like Figure 2 As shown, based on the same inventive concept as the optical fiber wavelength division multiplexing transmission method with tunable coherent light wavelength provided in Example 1, an embodiment of the present invention further provides an optical fiber wavelength division multiplexing transmission system with tunable coherent light wavelength, which is applied to a coherent optical communication device network, wherein the coherent optical communication device network includes a network controller and multiple coherent optical communication devices, each of the coherent optical communication devices has a tunable laser, and the system includes: The parameter determination module 11 is configured for each of the coherent optical communication devices to collect service characteristic parameters of the data to be transmitted, identify the data service type according to the service characteristic parameters, determine the transmission requirement parameters, and report the wavelength application requirement to the network controller.

[0092] The demand collection module 12 is used for the network controller to collect the wavelength application requirements of each of the coherent optical communication devices, perform network-wide wavelength planning based on the wavelength resource status of the entire network, and generate a network-wide wavelength allocation plan, wherein the network-wide wavelength allocation plan includes multiple coherent optical wavelengths allocated to each of the coherent optical communication devices.

[0093] The conflict detection module 13 is configured to perform wavelength conflict detection on the multiple coherent optical wavelengths, and if there is no wavelength conflict, determine a coherent modulation format and digital signal processing parameters according to the channel quality of each of the coherent optical wavelengths.

[0094] The data transmission module 14 is used for the network controller to send wavelength configuration instructions to each of the coherent optical communication devices according to the multiple coherent optical wavelengths. Each of the coherent optical communication devices controls the corresponding tunable laser to adjust to the specified wavelength according to the corresponding coherent optical wavelength, and performs data transmission according to the determined coherent modulation format and digital signal processing parameters.

[0095] Furthermore, the parameter determination module 11 is further configured to perform the following steps: Obtain a data packet size, transmission frequency, and traffic pattern of data to be transmitted of a first coherent optical communication device as the service characteristic parameters, wherein the first coherent optical communication device is any one of a plurality of coherent optical communication devices; analyze the service characteristic parameters through a service type identifier to determine a first data service type; determine a first transmission requirement parameter corresponding to the first data service type through a service type-transmission requirement mapping table; encapsulate the first data service type and the first transmission requirement parameter into a first wavelength application requirement, and report the requirement to the network controller.

[0096] Furthermore, the parameter determination module 11 is further configured to perform the following steps: Collect historical transmission data within a historical period, and extract the data packet size, transmission frequency and traffic pattern in the historical transmission data to obtain a sample transmission data set, including multiple sample transmission data, each of the sample transmission data includes a sample data packet size, a sample transmission frequency and a sample traffic pattern; label each of the sample transmission data with a service type to obtain a sample service type set; use the sample data packet size, sample transmission frequency and sample traffic pattern in the sample transmission data set as input features, and use the sample service type set as a supervision signal to train and generate the service type identifier.

[0097] Furthermore, the demand collection module 12 is further configured to perform the following steps: Acquire wavelength constraints for each of the coherent optical communication devices, and construct an initial wavelength configuration space based on the wavelength constraints; acquire allocated wavelengths based on the wavelength resource status of the entire network, and set the allocated wavelengths as taboo wavelengths in the wavelength configuration space to obtain a current wavelength configuration space; configure the starting allocated wavelength of each of the coherent optical communication devices based on the wavelength application requirements of each of the coherent optical communication devices; perform wavelength conflict detection on the starting allocated wavelength of each of the coherent optical communication devices in the current wavelength configuration space; if there is no conflicting wavelength, use the starting allocated wavelength of each of the coherent optical communication devices as the multiple coherent optical wavelengths; if there is a conflicting wavelength, perform network-wide wavelength iterative optimization in the current wavelength configuration space based on the starting allocated wavelength of each of the coherent optical communication devices to obtain multiple coherent optical wavelengths, and generate the network-wide wavelength allocation plan.

[0098] Furthermore, the demand collection module 12 is further configured to perform the following steps: For each wavelength application requirement of coherent optical communication equipment, matching historical application records are retrieved from the historical wavelength allocation database; wherein, the historical application records include historical data service type, historical transmission requirement parameters and corresponding historical allocated wavelengths, as well as corresponding historical transmission effects; performance evaluation is performed on each historical allocated wavelength based on the historical transmission effects, and the historical allocated wavelength with the best performance evaluation result is selected as the starting allocated wavelength corresponding to the current wavelength application requirement.

[0099] Furthermore, the demand collection module 12 is further configured to perform the following steps: At the starting allocated wavelength of each coherent optical communication device, conflicting coherent optical wavelengths are identified to obtain a conflict wavelength set and a corresponding conflict device set; for each conflict wavelength in the conflict wavelength set, one conflict device in the conflict device set is fixed to use the conflict wavelength in turn, and available wavelengths are reselected from the current wavelength configuration space for the remaining conflicting devices to generate multiple candidate wavelength allocation schemes; a network-wide performance evaluation function is obtained, and a performance evaluation is performed on each candidate wavelength allocation scheme to obtain a network-wide performance score for each candidate wavelength allocation scheme; and the candidate wavelength allocation scheme with the highest network-wide performance score is selected as the network-wide wavelength allocation scheme.

[0100] Furthermore, the demand collection module 12 further includes: the network-wide performance evaluation function is: ; ; ; ;in, Score the performance of the entire network. 、 、 is the weight coefficient and ; is the business priority satisfaction, is the channel quality utilization, is the wavelength resource balance; is the weight coefficient of the i-th level priority service, The number of successful allocations for priority level i services, is the quality satisfaction coefficient of the i-th level priority service, is the total number of applications for priority services at level i, is the priority number; is the actual transmission capacity of wavelength j, is the channel quality coefficient of wavelength j, is the number of wavelengths; is the standard deviation of the load factor at each wavelength, is the average value of the load factor at each wavelength.

[0101] Through the detailed description of a coherent light wavelength tunable optical fiber wavelength division multiplexing transmission method in the above specification, those skilled in the art can clearly understand a coherent light wavelength tunable optical fiber wavelength division multiplexing transmission system in this embodiment. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method description.

[0102] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A coherent light wavelength tunable optical fiber wavelength division multiplexing transmission method, characterized in that: Applied to a coherent optical communication device network, the coherent optical communication device network includes a network controller and multiple coherent optical communication devices, each of the coherent optical communication devices has a tunable laser, and the method includes: Each of the coherent optical communication devices collects service characteristic parameters of the data to be transmitted, identifies the data service type according to the service characteristic parameters, determines the transmission requirement parameters, and reports the wavelength application requirement to the network controller; The network controller collects wavelength application requirements of each of the coherent optical communication devices, performs network-wide wavelength planning based on the wavelength resource status of the entire network, and generates a network-wide wavelength allocation plan, wherein the network-wide wavelength allocation plan includes multiple coherent optical wavelengths allocated to each of the coherent optical communication devices; Performing wavelength conflict detection on the multiple coherent optical wavelengths, and if there is no wavelength conflict, determining a coherent modulation format and digital signal processing parameters according to the channel quality of each of the coherent optical wavelengths; The network controller sends wavelength configuration instructions to each of the coherent optical communication devices according to the multiple coherent optical wavelengths. Each of the coherent optical communication devices controls the corresponding tunable laser to adjust to the specified wavelength according to the corresponding coherent optical wavelength, and performs data transmission according to the determined coherent modulation format and digital signal processing parameters.

2. The method according to claim 1, characterized in that Each of the coherent optical communication devices collects service characteristic parameters of the data to be transmitted, identifies the data service type according to the service characteristic parameters, determines the transmission requirement parameters, and reports the wavelength application requirement to the network controller, including: Acquire a data packet size, a transmission frequency, and a traffic pattern of data to be transmitted of a first coherent optical communication device as the service characteristic parameters, wherein the first coherent optical communication device is any one of a plurality of coherent optical communication devices; Analyzing the service characteristic parameters by a service type identifier to determine a first data service type; Determining a first transmission requirement parameter corresponding to the first data service type through a service type-transmission requirement mapping table; The first data service type and the first transmission requirement parameter are encapsulated as a first wavelength application requirement, and the requirement is reported to the network controller.

3. The method according to claim 2, characterized in that The steps of constructing the business type identifier include: Collect historical transmission data within a historical period, and extract data packet size, transmission frequency, and traffic pattern from the historical transmission data to obtain a sample transmission data set, including a plurality of sample transmission data, each of the sample transmission data including a sample data packet size, a sample transmission frequency, and a sample traffic pattern; Marking each of the sample transmission data with a service type to obtain a sample service type set; The service type identifier is trained and generated using the sample data packet size, sample transmission frequency and sample traffic pattern in the sample transmission data set as input features and the sample service type set as a supervisory signal.

4. The method according to claim 1, wherein The network controller collects wavelength application requirements of each of the coherent optical communication devices, performs network-wide wavelength planning based on the wavelength resource status of the entire network, and generates a network-wide wavelength allocation plan, wherein the network-wide wavelength allocation plan includes multiple coherent optical wavelengths allocated to each of the coherent optical communication devices, including: Acquiring wavelength constraints of each of the coherent optical communication devices, and constructing an initial wavelength configuration space based on the wavelength constraints; Acquire an allocated wavelength according to the wavelength resource status of the entire network, and set the allocated wavelength as a taboo wavelength in the wavelength configuration space to obtain a current wavelength configuration space; Based on the wavelength application requirements of each of the coherent optical communication devices, configuring the starting allocated wavelength of each of the coherent optical communication devices; Performing wavelength conflict detection on the initial allocated wavelength of each of the coherent optical communication devices in the current wavelength configuration space, and if there is no conflicting wavelength, using the initial allocated wavelength of each of the coherent optical communication devices as the multiple coherent optical wavelengths; If conflicting wavelengths exist, network-wide wavelength iterative optimization is performed in the current wavelength configuration space according to the initial allocated wavelengths of each coherent optical communication device to obtain multiple coherent optical wavelengths and generate the network-wide wavelength allocation solution.

5. The method according to claim 4, characterized in that Based on the wavelength application requirements of each of the coherent optical communication devices, configuring the initial allocated wavelength of each of the coherent optical communication devices includes: Retrieving matching historical application records from a historical wavelength allocation database for each wavelength application requirement of a coherent optical communication device; The historical application records include historical data service types, historical transmission demand parameters and corresponding historical allocated wavelengths, as well as corresponding historical transmission effects; A performance evaluation is performed on each historically allocated wavelength according to the historical transmission effect, and the historically allocated wavelength with the best performance evaluation result is selected as the starting allocated wavelength corresponding to the current wavelength application requirement.

6. The method according to claim 4, characterized in that If there are conflicting wavelengths, performing iterative network-wide wavelength optimization in the current wavelength configuration space according to the initial allocated wavelengths of each of the coherent optical communication devices to obtain multiple coherent optical wavelengths and generate the network-wide wavelength allocation scheme, including: At the initial allocated wavelength of each of the coherent optical communication devices, identifying conflicting coherent optical wavelengths, and obtaining a conflicting wavelength set and a corresponding conflicting device set; For each conflicting wavelength in the conflicting wavelength set, one conflicting device in the conflicting device set is fixed to use the conflicting wavelength in turn, and available wavelengths are reselected from the current wavelength configuration space for the remaining conflicting devices to generate multiple candidate wavelength allocation schemes; Obtaining a network-wide performance evaluation function, performing a performance evaluation on each of the candidate wavelength allocation schemes, and obtaining a network-wide performance score for each candidate wavelength allocation scheme; The candidate wavelength allocation scheme with the highest performance score in the entire network is selected as the wavelength allocation scheme for the entire network.

7. The method according to claim 6, characterized in that The whole network performance evaluation function is: ； ； ; ; in, Score the performance of the entire network. 、 、 is the weight coefficient and ; is the business priority satisfaction, is the channel quality utilization, is the wavelength resource balance; is the weight coefficient of the i-th level priority service, is the number of successful allocations for priority level i services, is the quality satisfaction coefficient of the i-th level priority service, is the total number of applications for priority services at level i, is the priority number; is the actual transmission capacity of wavelength j, is the channel quality coefficient of wavelength j, is the number of wavelengths; is the standard deviation of the load factor at each wavelength, is the average value of the load factor at each wavelength.

8. An optical fiber wavelength division multiplexing transmission system with adjustable coherent light wavelength, characterized in that: Applied to a coherent optical communication device network, the coherent optical communication device network includes a network controller and multiple coherent optical communication devices, each of the coherent optical communication devices has a tunable laser, and the system includes: a parameter determination module, configured for each of the coherent optical communication devices to collect service characteristic parameters of the data to be transmitted, identify the data service type according to the service characteristic parameters, determine the transmission requirement parameters, and report the wavelength application requirement to the network controller; a demand collection module, configured for a network controller to collect wavelength application requirements of each of the coherent optical communication devices, perform network-wide wavelength planning based on the wavelength resource status of the entire network, and generate a network-wide wavelength allocation plan, wherein the network-wide wavelength allocation plan includes a plurality of coherent optical wavelengths allocated to each of the coherent optical communication devices; a conflict detection module, configured to perform wavelength conflict detection on the multiple coherent optical wavelengths, and if there is no wavelength conflict, determine a coherent modulation format and digital signal processing parameters according to the channel quality of each of the coherent optical wavelengths; A data transmission module is used for the network controller to issue wavelength configuration instructions to each of the coherent optical communication devices according to the multiple coherent optical wavelengths. Each of the coherent optical communication devices controls the corresponding tunable laser to adjust to the specified wavelength according to the corresponding coherent optical wavelength, and performs data transmission according to the determined coherent modulation format and digital signal processing parameters.

Images