103 results about "Optical communication networks" patented technology

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 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 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 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.

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.

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 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 application discloses a registration method and device of an optical communication network, and relates to the technical field of optical communication. A discovery window opened by an OLT is determined according to the distance between an optical relay device and a next-level optical network device of the optical relay device, and the OLT has configured specified BWmap information for the optical relay device, so that the OLT does not need to open a larger discovery window during the registration process of the next-level optical network device of the optical relay device, and only needs to open a discovery window suitable for the next-level optical network device. Therefore, the OLT only needs to open a smaller discovery window during the discovery process of an SN serial number, the time slot corresponding to the smaller discovery window is reduced, the service interruption time of other optical network devices in communication with the OLT is shortened, the uplink delay jitter of the optical communication network is reduced, and the communication stability of the optical communication network is improved.

The present application relates to the technical field of optical communication transmission, and discloses a path planning method based on an optical communication network, comprising the following steps: step one: connecting the optical communication network and an optical spectrum analyzer through a network, acquiring management data of a topology structure and signal monitoring data of all links, and classifying and forming a structure data set and a transmission data set, and real-time sensing a network state; step two: real-time analyzing link transmission bottlenecks of different topology structures, generating corresponding link bottleneck indexes, and efficiently positioning the link bottlenecks; step three: real-time analyzing the aggregable space of spectrum resources of the optical communication network, generating corresponding elasticity indexes, and directly reflecting the continuity and size of the available space of the spectrum resources; step four: setting bottleneck threshold values and elasticity threshold values with fixed numerical values, combining the link bottleneck indexes and the elasticity indexes, distinguishing transient shocks and persistent overloads, outputting corresponding path planning methods, and intelligently integrating high link utilization.

The invention relates to the technical field of optical communication transmission, and discloses an optical communication network-based path planning method, which comprises the following steps of: 1, connecting an optical communication network and an optical spectrum analyzer through a network, acquiring management data of a topological structure and signal monitoring data of all links, and classifying to form a structure data set and a transmission data set, sensing the network state in real time; 2, link transmission bottlenecks of different topological structures are analyzed in real time, corresponding link bottleneck indexes are generated, and the link bottlenecks are efficiently positioned; 3, analyzing an aggregable space of the spectrum resources of the optical communication network in real time, generating a corresponding elasticity index, and directly reflecting the continuity and size of the available space of the spectrum resources; 4, a bottleneck threshold value and an elastic threshold value with fixed numerical values are set, transient impact and continuous overload are distinguished in combination with a link bottleneck index and an elastic index, a corresponding path planning method is output, and the intelligent integration link utilization rate is high.

The embodiment of the application provides an optical assembly, a communication device and an optical communication network, and relates to the field of optical communication. The performance of the optical assembly is optimized. The specific scheme comprises: the optical assembly comprises a laser and a first optical waveguide. The laser is used for outputting a multimode signal light. The first optical waveguide comprises a first end and a second end arranged oppositely; the first end is used for receiving the first multimode signal light, and the second end is used for outputting a light beam from the first end. Wherein, the diameter of the core layer of the first end is 10-45 mu m, and the numerical aperture of the first end is 0.1-0.25. The rate of the multimode signal light is greater than or equal to 50 Gbps. The core layer of the first end can intercept the light rays of the high-order modes in the reflected light which are opposite to the transmission direction of the multimode signal light, reduce the noise of the laser, optimize the reliability of the laser and the optical assembly, and improve the problem of optical link flash.

The application relates to the technical field of intelligent scheduling of optical communication network resources, and discloses an intelligent scheduling method and system for optical communication network resources, which can comprehensively master the network operation state by acquiring equipment operation data, scheduling decision data and service performance data and performing time synchronization. On this basis, the method can identify weak fluctuations below a preset alarm threshold and perform risk marking, effectively solving the problem that weak fluctuations are difficult to be found in the prior art.

The utility model relates to optical communication network equipment technical field more specifically, relate to a kind of single-pumped bipolar erbium-doped fiber amplifier.A kind of single-pumped bipolar erbium-doped fiber amplifier, comprising: signal light source, optical isolator, coupler, pump laser, first-stage erbium-doped fiber and second-stage erbium-doped fiber;The output end of signal light source is connected with the first input end of coupler, and the output end of pump laser is connected with the second input end of coupler;The coupler, first-stage erbium-doped fiber, optical isolator and second-stage erbium-doped fiber are sequentially connected.

Various example embodiments for supporting burst mode communications in an optical communication system may be configured to support burst mode communications based on use of a burst delineation scheme for burst detection. The burst delineation scheme may be based on detection of a delimiter in a burst mode transmission based on selecting, from a received bit stream, a first and second sets of bits, computing first and second error statistics on the first and second sets of bits, computing one or more error metrics based on one or more linear combinations of the first and second error statistics, and determining, based on one or more comparisons based on the one or more error metrics and one or more error thresholds, whether the received bit stream includes a delimiter. The burst delineation scheme for burst detection may be used for burst detection within various types of optical communication networks, including passive optical networks.

This application provides a communication node and an optical communication network, belonging to the field of optical communication technology. The communication node includes a light source module, a link splitting module, and an optical transceiver module. The light source module provides local oscillator light and signal light to the optical transceiver module; the link splitting module receives downlink signals from the optical fiber, splits the downlink signals into N sub-downlink signals, and sends one sub-downlink signal to the optical transceiver module and the next node respectively, where N is a positive integer greater than 1; the optical transceiver module, based on the local oscillator light, obtains a signal with a wavelength matching the local oscillator light from the received downlink signals; it also generates an uplink signal with a wavelength different from the downlink signal based on the signal light, and sends the uplink signal to the optical fiber through the link splitting module. The uplink signal and the received downlink signal are transmitted in the same optical fiber but in opposite directions, saving optical fiber costs and fiber sourcing costs.

Embodiments of the present application provide a path planning method, a path planning device and an optical communication network, which are used to realize non-susceptible switching of high-quality primary and backup paths. The path planning method provided by the embodiments of the present application comprises: receiving request information and network resource information, the request information comprising information of a source node and a sink node, the request information indicating planning of primary and backup paths from the source node to the sink node, and the network resource information indicating topological information of a network. A first primary and backup path is sent, the first primary and backup path comprising a first primary path and a first backup path connecting the source node and the sink node in the network, the first primary path and the first backup path conforming to a mathematical model containing a delay difference constraint of the primary and backup paths, the mathematical model further containing an optimization strategy of the primary and backup paths, and a delay difference between the first primary path and the first backup path being less than or equal to a first threshold value.

A registration method for an optical communication network, an apparatus, a network device, and a system are disclosed, and the disclosure relates to the field of optical communication technologies. Regardless of whether a sub ONU goes online for the first time or goes online again, a main ONU allocates a registration identifier (ONU ID) to the sub ONU based on prestored SNs of sub ONUs that are to go online. To be specific, the main ONU does not need to open an SN discovery window for the ONU that is to go online, and does not need to interrupt a service of another sub ONU that communicates with the main ONU, implementing registration of the sub ONU with the optical communication network without opening a quiet window, and reducing delay jitter of the optical communication network caused by a registration process of the sub ONU.

The ability to efficiently and reliably transmit, route and receive data across telecommunication networks is essential for existing and evolving applications where connectivity to these networks is a ubiquitous aspect of society today. However, limitations in existing telecommunication networks impact this through performance, cost, and speed. To address this the inventor has established improvements with respect to routing (switching), processing, and monitoring. For routing low latency switch architectures for improving packet-based data switching are described. For processing digital optical logic devices and digital optical processing structures for enhanced functionality and processing within optical telecommunication networks are described. For monitoring improved optical connectors which provide embedded monitoring and analytical functionality for improved management of optical telecommunication networks are described.

The invention relates to the technical field of intelligent scheduling of optical communication network resources, and discloses an intelligent scheduling method and system of optical communication network resources, which can comprehensively master the network operation state by acquiring equipment operation data, scheduling decision data and service performance data and performing time synchronization. On the basis, the method can identify the weak fluctuation lower than the preset alarm threshold value and carry out risk marking, and the problem that the weak fluctuation is difficult to find in the prior art is effectively solved.

A laser (10) and a preparation method therefor, and an optical assembly, an optical module, and an optical communication network system (1), which relate to the technical field of semiconductors, and are used for solving the problems of light leakage and carrier diffusion in lasers. The laser (10) comprises a first semiconductor layer (110), a first dielectric layer (210), an active layer (310), a photonic crystal layer (410) and a second semiconductor layer (120) which are disposed on the active layer (310), and a second dielectric layer (220). The first semiconductor layer (110), the first dielectric layer (210), and the active layer (310) are stacked. The second semiconductor layer (120) is disposed around the photonic crystal layer (410). The second semiconductor layer (120) comprises a plurality of first material layers (121) and a plurality of second material layers (122), The first material layers (121) and the second material layers (122) are alternately disposed around a side surface of the photonic crystal layer (410). The refractive index of the first material layer (121) is different from the refractive index of the second material layer (122).

This application discloses an FC network simulation method, apparatus, and electronic device based on a simulation platform, relating to the field of optical communication network simulation technology. The method includes: configuring simulation parameters and constructing an FC node model to generate FC packets. An FC switch model is constructed based on the simulation parameters, including a switch port model, a message distribution model, and a switch processor model. The switch port model includes cascaded ports, achieving accurate simulation of large-scale networks. FC packets are sent from the FC node model to the switch port model and then uploaded to the message distribution model via the switch port model. Based on the message distribution model, the FC packets are distributed to the switch processor model or cascaded ports according to packet field information. Based on the switch processor model or cascaded ports, the FC packets are cached and forwarded to the corresponding target node model based on priority, achieving a reliable distribution mechanism and improving the adaptability of the simulation.

In an optical communication network including a plurality of communication apparatuses being connected by a transmission path transmitting WDM signal light in which a plurality of optical signals are performed wavelength division multiplexing, a network management apparatus includes an addition control unit that controls a first communication apparatus, when the first communication apparatus adds the optical signal to the WDM signal light, in such a way as to add, to be adjacent to each other, a plurality of the optical signals to be dropped by a second communication apparatus to a wavelength band being sandwiched between guard bands, and a drop control unit that controls the second communication apparatus, when the second communication apparatus drops the optical signal from the WDM signal light.

The invention provides a vehicle-mounted communication system and a vehicle, and is applied to the technical field of vehicle-mounted communication, the system comprises a central computing platform, a vehicle-mounted optical communication device and at least one optical communication network, and the optical communication network comprises an optical transmitting unit, an optical receiving unit, an optical fiber and a vehicle-mounted optical communication connector; the light emitting unit and the light receiving unit are connected with the vehicle-mounted optical communication connector through the optical fiber, the central computing platform is in communication connection with the light emitting unit and the light receiving unit, and the vehicle-mounted optical communication device is in communication connection with the vehicle-mounted optical communication connector; the light emitting units are located around the central computing platform to enable the light emitting units to share a cooling system of a vehicle with the central computing platform.

Embodiments of the present application provide a laser, a preparation method thereof, an optical assembly, an optical module and an optical communication network system, and relate to the technical field of semiconductors, and are used to solve the problems of light leakage and carrier diffusion of the laser. The laser comprises a first semiconductor layer, a first dielectric layer, an active layer, a photonic crystal layer arranged on the active layer, a second semiconductor layer and a second dielectric layer. The first semiconductor layer, the first dielectric layer and the active layer are arranged in layers. The second semiconductor layer is arranged around the photonic crystal layer. The second semiconductor layer comprises a plurality of first material layers and a plurality of second material layers. The first material layers and the second material layers are alternately arranged around the side surface of the photonic crystal layer. The refractive index of the first material layers is different from the refractive index of the second material layers.

The invention discloses an optical cable cross-connecting box with an intelligent monitoring function, and relates to the technical field of optical communication network facilities. According to the technical scheme, the optical cable cross connecting box comprises an optical cable cross connecting box body, the optical cable cross connecting box body comprises a main box body, a bottom box fixed to the bottom of the main box body and a box top fixed to the top of the main box body, the top of the main box body protrudes outwards, and a ventilation gap is formed between the outer wall of the protruding part and the inner wall of the box top; the air purifier further comprises a dehumidification part, the dehumidification part comprises a shell fixed to the main box body, an air inlet facing the ventilation gap is formed in one end of the shell, the other end of the shell extends into the main box body and is fixedly provided with a ventilation fan, and a filter element capable of rolling circularly and dehumidifying passing air is arranged in the shell. The sponge block in the filter element is used for adsorbing moisture, and online regeneration and recycling of the filter element are realized through mechanical extrusion, so that a drying agent which is easy to saturate and needs to be frequently replaced is fundamentally replaced, and the maintenance frequency and cost are remarkably reduced.

The application discloses a wireless infrared light routing communication system and method for battery pack management. The communication system is composed of a master control unit and slave control units coupled with each battery cell, and four communication modules are configured according to a networking mode. Each communication module contains an infrared transmitting end and a receiving end, and is coupled with surrounding slave control units on a wireless channel to realize full-duplex wireless light communication and form a grid-shaped light communication network among the battery cells. Light signals from the master control unit can be transmitted to target battery cells through multi-hop forwarding of adjacent battery cells as routing nodes. The slave control units of each battery cell do not need to maintain a routing table independently, but judge whether to accept a data frame or forward it through a communication module according to routing information carried in the data frame, so as to realize broadcast communication for all battery cells in the network or light routing communication for specific battery cells. The application has high path selection efficiency and flexible network coverage, and is suitable for wireless light network management of high-density battery packs.