246 results about "Optical communication networks" patented technology

The invention discloses an electric power optical communication network alarm analysis method and system based on a time-space diagram neural network. The method comprises the following steps: collecting data of an electric power optical communication network, preprocessing the collected data, and modeling the preprocessed data into a graph structure; extracting and learning the features of the nodes in the graph structure by using a space-time graph neural network, and generating space-time embedded representation of the nodes in combination with space feature extraction and time feature extraction; classifying the nodes based on the spatio-temporal embedding representation of the nodes to obtain prediction labels of devices corresponding to the nodes; and according to the prediction label of the equipment corresponding to the node, carrying out analysis and influence evaluation on the alarm condition in the power optical communication network. According to the method, the electric power optical communication network is represented as the graph structure containing the space-time information, the space-time dependence of the electric power optical communication network can be effectively captured based on the space-time graph neural network, the space relationship in the graph structure and the dynamic change in the time sequence are processed at the same time, and the accuracy and timeliness of alarm analysis are improved.

The invention discloses an optical communication network route optimization method and system, particularly relates to the technical field of multi-domain optical network collaborative networking, and is used for solving the problem of path selection deviation caused by topology abstraction and simplification in an existing multi-domain optical network. Intra-domain topology compensation parameters representing potential path resource consumption in sub-domains are reversely generated by acquiring inter-domain topology abstract information of a cross-domain optical network, and a hidden link competition relationship shared by cross-domain optical paths is dynamically monitored in combination with real-time link resource data to generate a competition intensity index; evaluating a port resource consumption weight based on a compensation parameter and a competition intensity index, fusing a load state to generate an optimal port selection weight, and finally screening a global path through a weight priority and triggering an optical switching node instruction to establish a cross-domain optical path; dynamic collaborative optimization of resource consumption and competition conflicts in the multi-domain optical network is realized, the accuracy of cross-domain path selection and the global utilization rate of network resources are effectively improved, and the risks of redundancy jump and local link congestion are reduced.

The invention provides an optical communication flow dynamic wavelength allocation optimization method and system, computer equipment and a storage medium, flow monitoring modules are arranged at nodes of an optical communication network, flow data of different service types at the nodes are acquired, a central control unit acquires existing wavelength resource information in the optical communication network, and the optimal wavelength allocation of the optical communication flow is realized. Evaluating whether the current wavelength resource allocation is reasonable; the central control unit sends the generated dynamic wavelength allocation mechanism to each node of the optical communication network, and each node adjusts the existing wavelength allocation through the received mechanism; and continuing to collect data of different services at each node, transmitting the collected data to the central control unit for evaluation, and if the preset target is not reached, executing the above steps again. The method has the advantages of balancing the resource distribution of the whole network, avoiding local congestion, improving the overall resource utilization rate, remarkably reducing the problems of packet loss rate and delay exceeding caused by signal crosstalk, reducing the probability of fragment generation in the future and avoiding single-point congestion.

The invention relates to the technical field of optical communication, and discloses an optical fiber loss evaluation method and system. The method comprises the steps that an optical fiber sensor collects real-time optical signal data and generates a dispersion velocity data sequence; extracting a fluctuation feature vector by adopting an adaptive filtering algorithm, and determining a dispersion velocity change trend; inputting the change trend and the transmission distance into a neural network model, predicting a loss fluctuation amplitude and generating a prediction loss sequence; calculating a coupling effect correlation coefficient, judging abnormal coupling and outputting an evaluation result; adjusting signal compensation parameters according to an evaluation result, optimizing nonlinear influence and determining a compensated dispersion velocity value; calculating a signal attenuation factor according to the compensated dispersion velocity value and the transmission distance, and generating an optimized transmission scheme; and updating optical communication network parameters according to the scheme, outputting stable signal quality and generating an optical fiber loss evaluation result. According to the invention, the problem of inaccurate evaluation caused by nonlinear fluctuation and signal coupling is solved, and the stability of optical fiber transmission and the signal quality are improved.

The invention discloses an optical communication network operation and maintenance fault reporting, positioning and tracking system, which relates to the technical field of optical communication network operation and maintenance, and comprises a coarse positioning module for performing phase demodulation and interference signal matching on optical fiber echo data, identifying a sudden change point and an abnormal interval, and generating a potential fault interval and a coarse positioning coordinate; the fine positioning module is used for transmitting a coded pulse signal to a link where the optical fiber echo data is located according to the potential fault interval and the coarse positioning coordinate, and performing matched filtering and deconvolution processing to generate a fine positioning echo characteristic curve; the fault identification module is used for carrying out deep learning classification on the fine positioning echo characteristic curve, identifying a fault type and generating a diagnosis result; and the visualization module is used for mapping the diagnosis result to the topology and geographic position information of the link section where the optical fiber echo data are located, and generating a visual interface. According to the invention, the manual troubleshooting time is obviously reduced, and the fault processing efficiency and reliability are improved.

The invention discloses a registration method and device of an optical communication network, and relates to the technical field of optical communication. The discovery window opened by the OLT is determined according to the distance between the optical relay equipment and the next-level optical network equipment of the optical relay equipment, and the OLT already configures the specified BWmap information for the optical relay equipment, so that the OLT does not need to open a larger discovery window in the registration process of the next-level optical network equipment of the optical relay equipment, and the registration efficiency of the optical relay equipment is improved. And only the discovery window matched with the next-level optical network equipment needs to be opened. Therefore, the OLT only needs to open a smaller discovery window in the discovery process of the SN, the time slot corresponding to the smaller discovery window is reduced, the service interruption time of other optical network equipment communicating with the OLT is shortened, the uplink delay jitter of an optical communication network is reduced, and the communication stability of the optical communication network is improved.

The invention discloses an optical communication network adaptive entropy loading method and device based on transfer learning, and belongs to the technical field of optical communication, and the method specifically comprises the steps of entropy loading model building, synthetic signal generation and model pre-training, experimental signal generation and model transfer learning, and adaptive entropy loading. In the whole process, the entropy distribution process of traditional entropy loading is replaced by the neural network, and the entropy approaching the channel capacity is predicted according to the received signal. A large number of synthetic signals are used for pre-training an entropy loading model, transfer learning is combined, the entropy loading model predicts the entropy of an unknown channel in the optical communication network in a self-adaptive mode, dependence of an existing entropy loading algorithm on the channel state is reduced, and therefore self-adaptive entropy loading of the optical communication network is achieved.

The invention discloses a pre-configuration protection method based on risk identification, and the method comprises the steps: collecting multi-dimensional data of a target electric power optical communication network, including logic topology information, a service demand set and dynamic environment data; logic links in the target power optical communication network are identified and divided into different shared risk groups, and a comprehensive risk index of each shared risk group is calculated; adding the shared risk groups of which the comprehensive risk indexes are greater than a preset risk index threshold value into a to-be-protected queue, and generating an optimal standby network loop for each shared risk group in the queue to obtain a network protection ring of the to-be-protected queue; when a to-be-processed service request is received, selecting a target protection path for the to-be-processed service request from the network protection ring, so that the to-be-processed service request is switched to the target protection path when a fault occurs; according to the invention, the network can be rapidly switched when a fault occurs, and the reliability and recovery speed of the power optical communication network are improved.

The invention relates to the technical field of optical communication networks, and discloses an optimal control method and system for an OTN (Optical Transport Network), and the method comprises the steps: dynamic network modeling, dynamic weight distribution, path evaluation and selection, adaptive routing adjustment and real-time path slicing. The system applies the method. According to the method, through dynamic network modeling, intelligent dynamic weight distribution, nonlinear path evaluation and selection, an adaptive routing strategy and a dynamic real-time path slicing technology, the intelligent level, the resource utilization efficiency and the business service quality of the OTN network are improved from multiple dimensions; the problems that a traditional OTN system is poor in adaptability, inflexible in scheduling, unreasonable in resource allocation and the like in a complex network environment are solved.

The embodiment of the application provides an optical amplifier, an optical assembly, an optical module, an optical communication network system and a detection device, relates to the technical field of semiconductors, and is used for solving the problem of one-way light emission of the optical amplifier. The optical amplifier comprises a waveguide and a photonic crystal. The waveguide comprises a core region and a cladding region arranged at the periphery of the core region. The waveguide further comprises an incident light side, a first light emission side and a second light emission side. The photonic crystal is arranged in the cladding region of the waveguide. The core region is located between the incident light side and the first light emission side, and the photonic crystal is located between the second light emission side and the core region. The photonic crystal is used for receiving incident light from the incident light side and emitting first emitted light and second emitted light. The first emitted light is emitted from the first light emission side, and the second emitted light is emitted from the second light emission side.

The invention discloses an optical burst link conflict control method and system based on priority scheduling, and relates to the technical field of optical communication network control, a burst joint scheduling and conflict cost evaluation mechanism based on priority weight is introduced into an OBS core node, and the method comprises the following steps: sorting control packets in a sliding time window, predicting an occupied time interval in combination with the offset time and the burst length; constructing a candidate gap set by using a lightweight data structure for recording each wavelength free interval; and calculating the conflict cost of each candidate wavelength according to the priority weight, the time overlapping relationship and the gap change after insertion, selecting the wavelength with the minimum cost, and updating the idle interval information in real time. Therefore, priority guarantee of high-priority services and refined allocation of wavelength resources are realized, so that burst conflicts and the discard rate are reduced in a high-load scene, and the throughput and the stability of an OBS network are improved.

The invention discloses a registration method, device, network equipment and system of an optical communication network, and relates to the technical field of optical communication. No matter in the first online or re-online process of the slave ONU, the master ONT allocates a registration identifier (ONU ID) to the slave ONU based on the pre-stored SN of the to-be-online slave ONU, that is, the master ON does not need to open an SN discovery window for the to-be-online ONU and does not need to interrupt services of other slave ONUs communicating with the master ONU, so that zero-windowing registration of the slave ONU in an optical communication network is realized, and the communication efficiency of the optical communication network is improved. And the delay jitter of the optical communication network caused by the registration process of the ONU is reduced.

Various example embodiments for supporting optical communications in an optical communication system may be configured to support dual-polarization alignment for dual-polarization communications within an optical communication network. Various example embodiments for supporting dual-polarization alignment, within an optical communication network supporting optical communications from a transmitter to a receiver based on dual polarizations including a first polarization and a second polarization, may be configured to support dual-polarization alignment to the dual polarizations at the receiver based on communication of a data segment such that a first portion of the data segment is communicated based on the first polarization and a second portion of the data segment is communicated based on the first polarization and the second polarization.

The invention provides an optical network transmission quality prediction method based on multi-scale decomposition heterogeneous fusion, and relates to the technical field of optical communication network intelligent monitoring, and the method comprises the steps: taking an STL seasonal component, a first group of intrinsic mode functions and a second group of intrinsic mode functions of original QoT time series data as homologous input data, inputting the homologous input data into a heterogeneous fusion prediction model, and carrying out the prediction of the transmission quality of an optical network; after a TCN branch and an Informer branch extract a local feature tensor and a global feature tensor in parallel, tensor splicing is executed through a feature splicing layer, a fusion feature tensor is output, and a full-connection regression layer executes weighted mapping processing on the fusion feature tensor and outputs a transmission quality predicted value. The technical problems that an existing QoT prediction method is high in calculation complexity and difficult in long-range dependence modeling are solved. Local details and global semantic features are fused through a parallel structure, and feature distillation and residual connection optimization are combined, so that the accuracy and calculation efficiency of QoT prediction are remarkably improved.

A clock circuit, a receiver, and a passive optical communication network system are disclosed. The clock circuit is applied to a receiver in a passive optical communication network and is configured to adjust the clock frequency of an output clock signal based on a transmission protocol, the clock circuit comprises at least one clock path and a frequency divider, and the at least one clock path comprises a first clock path; wherein the first clock path receives a reference clock signal from the first phase-locked loop circuit and a control signal from the clock data recovery circuit, and interpolates a conversion signal of the reference clock signal by using the reference clock signal so as to output a multi-phase clock signal; and the frequency divider receives the multi-phase clock signal and performs frequency division on the multi-phase clock signal based on a preset frequency division value, and the preset frequency division value is determined based on a transmission protocol. The clock circuit can be compatible with fast clock switching schemes of data rates of different PON protocols, so that the adaptability and the locking performance of a receiver in a burst mode are improved.

The invention relates to an adaptive optical compensation method and system for underwater optical communication. The method comprises the following steps: acquiring real-time transmission data of a light beam in an underwater optical communication network, preprocessing the real-time transmission data, and performing feature extraction to obtain a high-frequency disturbance signal and a low-frequency disturbance signal; then, based on the high-frequency disturbance signal and the low-frequency disturbance signal, a first compensation control instruction and a second compensation control instruction are generated through an algorithm; the first compensation control instruction and the second compensation control instruction are fused and input into a trained compensation model, and an optical transmission quality baseline value in the current environment is obtained; and finally, according to the optical transmission quality baseline value and the historical environmental parameter change trend, adjusting the parameters of the compensation model by means of a gradient descent method, and generating a dynamic compensation scheme. According to the method and the system, the stability, the reliability and the transmission quality of underwater optical communication can be improved, and negative effects caused by signal attenuation and distortion are effectively reduced.

The utility model discloses an optical fiber connector, an optical communication network system and a vehicle. The optical fiber connector comprises a first joint and a second joint. The first joint and the second joint respectively comprise a shell and an insertion core, a mounting cavity is defined in the shell, the insertion core penetrates through the mounting cavity, one of the first joint and the second joint is provided with a plurality of first limiting structures, the other one is provided with a plurality of second limiting structures, the optical fiber connector has a matching state, and in the matching state, the first limiting structures are matched with the second limiting structures. The insertion core of the first connector is in butt joint with the insertion core of the second connector, and each first limiting structure is in radial limiting fit with the corresponding second limiting structure. According to the optical fiber connector, optical signal transmission is stable, and connection reliability is high.

Disclosed are a registration method and apparatus for an optical communication network, a network device and a system, relating to the technical field of optical communications. A first network device receives a serial number (SN) request of a second network device by means of a downlink wavelength; the first network device sends an SN response to the second network device by means of a dedicated activation wavelength; the first network device receives a ranging request of the second network device by means of the downlink wavelength; and the first network device sends a ranging response to the second network device by means of the dedicated activation wavelength, wherein the dedicated activation wavelength is different from an uplink wavelength of the first network device. By sending an SN response by means of a dedicated activation wavelength, zero-window registration of an ONU in an optical communication network is realized, thereby reducing the delay jitter of the optical communication network caused by the registration process of the ONU.

The invention discloses an underwater optical communication routing method based on a three-dimensional dynamic conical sector, belongs to the technical field of underwater wireless communication, and is used for solving the problems of poor routing stability, low communication success rate, high energy consumption, non-adaptive path and the like in the existing underwater optical communication network. The method comprises the following steps: constructing an underwater optical communication network model in a three-dimensional space, and defining a dynamic cone communication sector based on a divergence angle and a direction angle between nodes; discovering neighbor nodes through a conical scanning mechanism, and performing multi-index optimization on candidate forwarding nodes based on distance progress, expected progress, energy efficiency indexes and time delay indexes; selecting an optimal path according to an evaluation result; performing competition coordination among candidate nodes by using a fast time slot response mechanism, and selecting a next hop node; and completing path construction through hop-by-hop transmission, dynamically adjusting a divergence angle, and executing path maintenance and updating. The method does not need global topological information, and is suitable for an underwater communication scene with uncertain node distribution in a dynamic environment.

A network management system can be configured to identify routes for satisfying a set of demands on a communications network using layer graph(s). The network management system can generate the layer graph(s) using a network graph that represents the optical communication network and an associated sets of available frequency slots. The network management system can iteratively identify candidate path(s) on the layer graph(s) that correspond to each of the demands and determine a cost for each candidate path. The cost for a candidate path can depend on a set of available edges affected by the selection of the candidate path. In each iteration, the network management system can select the lowest cost candidate path, update the network graph to reflect the selection of this candidate path, update the layer graph(s) based on the updating of the network graph, and update the candidate paths for the remaining demands as needed.

The invention discloses a wavelength division multiplexer device and method compatible with channel monitoring, and relates to the technology of wavelength division multiplexers. According to the integrated wavelength division demultiplexer device with the wavelength division demultiplexing end adopting the waveguide deep etching Bragg grating, the functions of multi-channel network information transmission and network channel state monitoring can be realized at the same time; the wavelength division demultiplexer comprises a wavelength division demultiplexer common end input waveguide, a wavelength division demultiplexer, a wavelength division demultiplexer output waveguide and a Bragg grating which is written in the wavelength division demultiplexer output waveguide area by adopting a phase mask method. The device is high in integration degree and simple in structure. The channel monitoring method provided by the invention is realized based on the integrated wavelength division demultiplexer device, does not need to additionally distribute wavelengths for monitoring channels and independently distribute optical fibers for returning monitoring signals, is low in implementation difficulty compared with a software means for monitoring link node information, and can be applied to a complex optical communication network.

The invention relates to a dynamic reconstruction method and system for a digital twin optical switching network, and relates to the technical field of optical communication network intellectualization, in particular to a dynamic reconstruction system applied to an optical switching network, comprising the following steps: in a digital twin, establishing a topological graph capable of being dynamically updated in real time by adopting multi-dimensional real-time topology perception, and combining key parameter data to obtain a topological graph; and high-precision twinning synchronization is established for the digital twinning body and the physical network state. And service intention analysis is performed on service requests or fault triggering reconstruction through an intention driving control layer, different services are constrained and mapped, and a constraint set is quantified. And combining the constraint set with source and destination nodes, and analyzing on a topological graph to generate a candidate strategy. And performing simulation verification by the digital twin through a simulation engine and pre-verification, selecting an optimal strategy, and outputting an instruction. In a physical network layer, physical processing such as port switching and light emitting of an optical module is executed according to an instruction, and performance deviation is corrected through closed-loop feedback. According to the invention, high-reliability and high-efficiency dynamic optical path reconstruction is realized.

The invention discloses an optical communication network operation and maintenance fault intelligent positioning and tracking method and system, and relates to the technical field of optical communication operation and maintenance decision making, and the method comprises the steps: collecting optical cable stress field data and environment image data in real time, and recognizing a cable trench marker through a pre-trained convolutional neural network; abnormal events are detected, and an abnormal event coordinate set and an image recognition abnormal sequence are generated; constructing an image-stress fusion positioning model, inputting the optical cable stress field data and the abnormal event coordinate set into the image-stress fusion positioning model, and generating accurate positioning coordinates; performing space-time sequence analysis on the optical cable stress field data, identifying an abnormal sequence in combination with an image, and generating a stress propagation rate and direction; generating a dynamic topological graph according to the accurate positioning coordinates; and coloring and grading the dynamic topological graph to form a risk conduction graph. According to the invention, by constructing the image-stress fusion positioning model, time-space unification and feature optimization of data are realized, and the precision and robustness of fault positioning are improved.

Described herein are balanced, bidirectional, optical communication networks. These networks may be used in large-scale settings, including in networks including more than one hundred nodes or more than one thousands nodes. A network may include a plurality of nodes. Each node comprises a plurality of optical transceivers of a first type and a plurality of optical transceivers of a second type. The types differ from each other in a characteristic of light transmitted by the respective optical transceiver. The optical transceivers of the first type are in equal numbers across the plurality of nodes and the optical transceivers of the second type are also in equal numbers across the plurality of nodes. A plurality of optical channels connect the nodes with one another by coupling optical transceivers of the first type with optical transceivers of the second type. The optical channel support bidirectional communication between the connected nodes.

The invention relates to an intelligent calculation center optical network optical path survivability-oriented air-ground cooperative unmanned aerial vehicle distributed optimization deployment method and system, and belongs to the technical field of optical communication network protection. The invention aims to solve the technical problems of long switching time delay, limited coverage and poor stability of a traditional single ground or air protection mechanism. According to the technical scheme, an air-ground cooperative protection architecture is constructed, and firstly, an integer linear programming model with the aim of minimizing the total cost of a system is established to carry out precise deployment optimization of unmanned aerial vehicle nodes; in order to improve the solving efficiency, a spectral clustering and K-means clustering-based heuristic algorithm is designed to realize rapid intelligent division of the unmanned aerial vehicle service domain; the deployed unmanned aerial vehicle cluster adopts a master-slave architecture and has a failover mechanism, and a temporary relay network can be quickly established when a ground optical path fails. According to the invention, the survivability and fault recovery efficiency of the optical network are effectively improved, and good balance between deployment cost and protection performance is realized.

The invention provides an optical communication network, relates to the field of optical communication, and can reduce time consumption for replacing false light and signal light in a link. The optical communication network comprises at least three WSSs, and each WSS comprises a common end and a plurality of branch ends. The first branch end of the first WSS is connected with the first branch end of the second WSS; the second branch end of the first WSS is connected with the first branch end of the third WSS; the common end of the first WSS is used for receiving a first optical signal and outputting the first optical signal to the second WSS; the first WSS is also used for receiving a first control instruction issued by the network control device and outputting the first optical signal to the third WSS based on the first control instruction; the third WSS is used for receiving a second control instruction issued by the network control device before the first WSS outputs the first optical signal to the third WSS; and the third WSS is also used for outputting the first optical signal to the common end of the third WSS in response to the second control instruction after receiving the first optical signal. The embodiment of the invention is applied to optical communication.

Dual-Mode Antenna for Hybrid Microwave and Optical Communication Networks

The invention provides an optical cross node device with low cost and a high-reliability protection mode, which can improve the security and stability of an optical communication network. The node comprises a first switching unit array and a second switching unit array, each first switching unit comprises M1 input ports and N1 output ports, and each second switching unit comprises M2 input ports and N2 output ports. One part of the N1 output ports is connected with the first downstream node through a first working optical fiber, and the other part of the N1 output ports is connected with one input port of each second switching unit through a first internal optical fiber. The N2 output ports are connected with the second downstream node through the first protection optical fiber. The first switching unit is used for transmitting one path of optical signals to a first downstream node through a first working optical fiber, or transmitting one path of optical signals to the second switching unit through a first internal optical fiber. And the second switching unit is used for transmitting one path of optical signal to a second downstream node through the first protection optical fiber.

It is difficult to improve the usage efficiency of an optical communication network due to the passband narrowing effect in a wavelength selection process in an optical communication network using a wavelength division multiplexing system; therefore, an optical network management apparatus according to an exemplary aspect of the present invention includes wavelength selection information generating means for generating wavelength selection information on a wavelength selection process through which an optical path accommodating an information signal goes, with respect to each optical path; and wavelength selection information notifying means for notifying an optical node device through which the optical path goes of the wavelength selection information.