52results about "Ring-type electromagnetic networks" patented technology

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 fiber ring network optical cable link multi-mode physical information sensing method and system, and belongs to the technical field of optical fiber ring network communication link monitoring. In order to solve the technical problem that a fault of an electric power communication optical cable link is difficult to accurately identify and distinguish due to the coupling effect of multiple physical quantities such as external damage, stress and temperature, based on a single idle optical fiber, the phase change of a backscattering signal is obtained through a phase reduction technology; and a multi-mode physical quantity coupling model containing axial, radial and circumferential strain and temperature is constructed and inverted, so that quantitative distinguishing and positioning of stress, strain, temperature and vibration are realized. According to the method, a step-by-step decoupling strategy of first temperature compensation, then strain inversion and then vibration separation is adopted, and a two-stage discrimination mechanism of physical prior and machine learning is combined, so that the accuracy and interpretability of event recognition are remarkably improved. Depth perception and accurate fault positioning of the physical state of the optical cable link are realized.

The application discloses a communication method, device, system and train, relates to the field of optical fiber communication, and is applied to a processor in any compartment of a train, wherein the processor is connected with an optical fiber ring network, the processor and train communication equipment in the compartment perform communication data interaction, and then the processor and the optical fiber ring network perform communication data interaction in the form of optical signals, so that the train communication equipment in different compartments can communicate with each other. The communication data is not easy to be lost and is not easy to be affected by electromagnetic interference through the mode of data transmission by optical fibers instead of cables, so that the communication quality of the train communication equipment is improved. Moreover, the communication data of multiple train communication equipments is converted into optical signals and transmitted in the form of a bundle of light, so that multiple communication networks are not needed, and only one optical fiber ring network can realize data transmission of multiple train communication equipments at the same time, so that the complexity of the wiring environment in the train is reduced, and the total weight of the train is reduced.

A switching control method, network element and system in an SDH ring network, applied to a master processor of a network element in the SDH ring network, the network element comprising an eastward single board and a westward single board, and the total capacity of the panel ports in the eastward single board and the westward single board is greater than the total capacity of the backboard ports in the eastward single board and the westward single board respectively; the method comprises: obtaining virtual container (VC) cross corresponding information of the eastward single board and the westward single board, the VC cross corresponding information indicating the VC cross corresponding relationship between the panel ports and the backboard ports in the single board; when the optical fiber communication connection corresponding to the currently used single board in the eastward single board and the westward single board is disconnected, performing a multiplexing section protection switching operation of the network element according to the VC cross corresponding information, so as to improve the accuracy and reliability of the switching operation.

A communication method related to the field of optical fiber communication and applied to a processor (22) in a train car. The processor (22) is connected to an optical fiber ring network, and the processor (22) performs communication data interaction with a train communication device in a car and then performs communication data interaction in the form of an optical signal with the optical fiber ring network to implement communication between the train communication devices in different cars. Data transmission is performed via an optical fiber instead of a cable, so that communication data is not susceptible to loss and is immune to electromagnetic interference, thereby improving the communication quality of the train communication devices.Furthermore, the communication data of the multiple train communication devices is converted into optical signals and combined into a light beam for transmission, so that only one optical fiber ring network is required for the simultaneous data transmission of the multiple train communication devices without establishing multiple communication networks, thereby reducing the complexity of the in-train wiring environment and reducing the overall weight of the train. Furthermore, a communication device and a communication system, as well as a train, are provided.

To provide a communication system capable of improving fault tolerance when multiple faults occur in a ring-shaped wired communication path to which multiple communication devices are connected.SOLUTION: A communication system 8 having a wired communication network 2 and a wireless communication network 3 includes multiple first communication devices for transmitting data acquired from connected devices and a second communication device to which a device that collects data is connected. The multiple first communication devices and the second communication device are connected by a ring-shaped wired communication path. When breakage of the wired communication path is detected between the first communication device and the second communication device, the first communication device whose wired communication path has been broken with the second communication device or the second communication device determines a representative communication device that transmits data to the second communication device by wireless communication, among from a first communication device group to which the first communication device whose wired communication path has been broken with the second communication device is connected by wire.SELECTED DRAWING: Figure 1

The present invention provides an optical path switching system and an optical path switching method in which an intramural node and one or more extramural nodes arranged on looped optical fiber are used. A terminal connected to the extramural node is connected to the intramural node via a first core extending from the intramural node in a first direction along the optical fiber, while power supply and control are carried out from the intramural node via a second core extending from the intramural node in a second direction going the opposite way along the optical fiber relative to the first direction. When communication via the first core is unavailable, the connection is switched from the first core to a third core extending from the intramural node in the second direction, and the terminal is connected to the intramural node via the third core.

The objective of the present disclosure is to enable confirmation of a connection between optical fibers using test light from an accommodating station, even when a point-to-point connection is being carried out in an optical fiber network.　Disclosed is a remote optical path switching node for connecting two loop networks in which optical fibers are connected in a loop, wherein the two loop networks comprise an upper loop close to a tester that emits test light and a lower loop far from the tester, said remote optical path switching node comprising: an optical cross-connect connected to the optical fibers constituting the lower loop; a testing optical coupler that is connected to a testing optical fiber for propagating test light in the upper loop, and that can be connected to the optical cross-connect; a control unit for controlling connection of the optical cross-connect and the testing optical coupler; and a light extraction unit for detecting the test light propagated in the upper loop and emitted from the testing optical coupler or the optical cross-connect.

The application discloses an optical signal inner circulation delay system based on electro-optic polarization modulation, comprising a signal light source, a first polarization beam splitter prism, a first electro-optic polarization modulator, a second polarization beam splitter prism, a second electro-optic polarization modulator, a third polarization beam splitter prism, a first full reflection mirror, a first lens, a first optical fiber collimator, a single-mode / multi-mode optical fiber, a second lens, a second optical fiber collimator and a second full reflection mirror, forming a ring-shaped light path. The length of the single-mode / multi-mode optical fiber and the high level duration of the modulation electric signal are adjusted, the repetition frequency and the pulse width of the output optical signal can be changed respectively, and therefore the application can also be used for converting continuous light into controllable pulsed light. The number of times that the signal light circulates in the ring-shaped light path can be controlled through the loaded electric signal, the delay time is flexibly adjusted, and the delay time range is expanded.

A connection system and a connection method according to the present invention use an in-facility node installed on a loop-shaped optical fiber and optical cross-connects in a plurality of external nodes arranged at different positions on the optical fiber. Among the optical cross-connects, with respect to a first optical cross-connect and a second optical cross-connect, a first optical fiber core included in the optical fiber passes through the in-facility node and the first optical cross-connect, and does not pass through the second optical cross-connect.

The invention discloses an event database-based optical fiber ring network fault diagnosis method and system, and the method comprises the steps: collecting the historical operation data and fault event information of an optical fiber ring network, including optical power, bit error rate, polarization state parameters, OTDR waveforms and fault processing records, and building an event database; constructing a convolutional neural network model, and performing fault feature learning and model training on the samples in the event database by using the convolutional neural network model to obtain a trained optical fiber ring network fault diagnosis model; and inputting fault data acquired in real time into the trained optical fiber ring network fault diagnosis model, performing feature matching with historical samples in the database, and identifying fault types and causes on line to obtain a diagnosis result. And the operation and maintenance efficiency, the reliability and the intelligent level of the optical fiber ring network are obviously improved.

This specification provides a heterogeneous network architecture for high-speed trains. This heterogeneous network architecture includes: a vehicle-level Ethernet network comprising multiple vehicle-level Ethernet nodes, which are connected in series in a ring network to form a first channel and a second channel. The first channel is connected to the first network port of the subsystem, and the second channel is connected to the second network port of the subsystem. The train-level backbone network comprises four train-level backbone network nodes. Two train-level backbone network nodes are installed in each of the first and eighth carriages of each traction unit, and these two nodes are connected to the first and second channels, respectively. The train-level backbone network nodes interact with the vehicle-level Ethernet nodes through a backplane. Based on this network architecture, network transmission reliability can be improved while optimizing real-time and redundancy requirements, further meeting the transmission needs of high-bandwidth data services.

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.

The invention discloses an optical transmission system, an optical fiber loop system and electronic equipment, and relates to the technical field of optical transmission, and the optical transmission system comprises an isolation module which is connected with an output port of a first coupler and is used for receiving an optical fiber loop input signal; the first end of the hollow-core optical fiber is connected with the isolation module, and the hollow-core optical fiber is used for transmitting an optical fiber ring input signal; the feedback module is connected with the second end of the hollow-core optical fiber and is used for returning the input signal of the optical fiber ring to the hollow-core optical fiber; and the isolation module is also connected with the acousto-optic modulator and is also used for outputting the returned input signal of the optical fiber ring to the acousto-optic modulator. The fiber loop input signal is transmitted back and forth in the single-section hollow-core fiber, so that the equivalent transmission distance of the single-section hollow-core fiber is doubled, noise cumulants such as amplified spontaneous emission noise and nonlinear distortion are remarkably reduced, the signal transmission quality and the system stability are improved, and the system performance is improved. And the control difficulty of the acousto-optic modulator and the operation and maintenance complexity of the system are reduced.

An autonomous mining system (100) comprising a real-time digital video transmission subsystem (110) configured to obtain a video stream (125, 127) from underground and transmit the video stream to a control center (115) located on the surface, and an exploration and maintenance subsystem (130) located underground and configured to extract resources and bring the resources to the surface based only on commands received from the control center (115) through the real-time digital video transmission subsystem (110).

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.

The invention relates to the field of optical network communication, in particular to a double-ring optical network communication management system for factory equipment control communication, which is used for solving the problem of insufficient reliability of a double-ring optical network caused by incapability of realizing cross operation of two networks in an operation process of the double-ring optical network. Comprising a communication supervision unit, a communication analysis unit, a communication statistics unit, a ring network switching unit and a maintenance management unit. According to the invention, in the operation process of the double-ring optical network, the evaluation unit of the network is subdivided into short links, transmission evaluation is carried out on the short links, the transmission evaluation is carried out in three aspects of transmission efficiency, transmission fluctuation and fault early warning, the comprehensiveness of transmission evaluation is improved, when the short links are abnormal, the information transmission of the whole line cannot be stopped, and the transmission efficiency of the whole line is improved. Information transmission is completed in a mode that the two lines operate in a crossed mode, so that normal operation of communication work can be guaranteed when the same position of the primary line and the secondary line of the double-ring optical network does not fail at the same time, and the operation reliability of the double-ring optical network is improved.

The invention relates to a dual-redundancy-based optical fiber communication device and an optical fiber receiving and forwarding filtering method, and belongs to the field of optical fiber communication. The dual-redundancy optical fiber communication device comprises a main processing module, an optical fiber communication module, a VPX backboard, an optical fiber link and a power supply module. According to the invention, the ring topology is constructed through the dual-redundancy link, when the main path is interrupted due to problems such as equipment fault, link damage or signal interference, the standby path can automatically take over data transmission work, communication is ensured not to be interrupted, network paralysis caused by single-point fault is avoided, and the continuity of the network is effectively ensured; an additional standby optical switch is not needed, a redundancy function and optical fiber data filtering and forwarding are realized through existing optical fiber resources and optical modules, and the hardware cost is reduced; and the method has good compatibility and expandability.

An optical fiber ring link suitable for bidirectional communication, belonging to the field of optical fiber communication, includes an optical signal transmitting component for outputting a first optical signal and a second optical signal; an optical signal receiving component for receiving the first and second optical signals; and a second coupler for receiving the first and second optical signals output by the optical signal transmitting component and transmitting them to a first loop and a second loop respectively, and also for receiving the first and second optical signals output by the first and second loops and transmitting them to the optical signal receiving component respectively. The first and second loops are connected in parallel through multiple circulators to form a ring link. In this ring link, the transmission directions of the first and second optical signals are split by multiple circulators, so that the first and second optical signals are transmitted in clockwise and counterclockwise directions along the ring link respectively. This application can solve the technical problem that existing optical fiber ring links are not suitable for bidirectional communication.

The invention provides a vehicle-road cloud integrated fusion networking system, method and device and a computer medium. The vehicle-road cloud integrated fusion networking system comprises a communication fusion module, a hierarchical networking module, a cloud collaboration module and a redundant link module. The communication fusion module is configured to perform data transmission based on fusion of a fifth-generation mobile communication network and a cellular Internet of Vehicles direct communication technology; the hierarchical networking module comprises access layer switching equipment, convergence layer switching equipment and core layer switching equipment, the access layer switching equipment is deployed at a road fork, the convergence layer switching equipment is used for ring networking, and the core layer switching equipment is connected with an edge cloud server; the cloud collaboration module is connected with a remote cloud server through firewall equipment at the outlet of the core layer switching equipment, so that collaborative interaction between the edge cloud server and the remote cloud server is realized; the redundant link module is configured to be a wired backhaul link and a wireless backhaul link, and the wireless backhaul link serves as a backup channel of the wired backhaul link.

The utility model provides a ship, a multi-ship data transmission system, a ship and a ship group, and relates to the technical field of ship communication, the ship comprises a data transmission subsystem which comprises a plurality of switches, the plurality of switches form a ring topology, and the ring topology is provided with a first link and a second link; the first ship control subsystem is connected with a first switch in the plurality of switches; and the second ship control subsystem is connected with a second switch in the plurality of switches, and communicates with the first ship control subsystem through a second link when the first link fails. According to the utility model, the reliability and expansibility of the ship are improved by using the ring network topology.

The utility model discloses an intelligent storage and transportation station coal storage yard safety monitoring device which comprises an optical fiber ring network device, the optical fiber ring network device is provided with a first switch, a second switch, a third switch and a plurality of sets of fourth switches, the fourth switches are connected with an infrared imager and a monitoring substation, and the monitoring substation is connected with the optical fiber ring network device. The monitoring substation is connected with an intrinsic safety power supply and a bus, and the bus is connected with a temperature sensor, an infrared methane monitor, a carbon monoxide monitor, an infrared carbon dioxide monitor, a dust concentration monitor and a smoke sensor. According to the intelligent safety monitoring device for the coal storage yard of the storage and transportation station, a non-contact coal pile temperature on-line monitoring method is provided on the basis of an infrared temperature measurement technology, gas detection and temperature measurement probe rods are additionally arranged, the temperature is monitored in multiple directions, the device is linked with a fire extinguishing system, and when the temperature of piled coal is increased, the safety of the piled coal is guaranteed. And the fire monitor is automatically started to cool the coal pile.

The present invention transmits signals of many optical paths to an upper node by time-division multiplexing optical signals of many lower nodes using a single wavelength. The present invention suppresses a decrease in a transmittable band for each time slot due to an increase in the number of time slots to be statically allocated to each node with an increase in the number of optical paths. A shared time slot (16) which a plurality of lower nodes can use for transmission is prepared. An upper node regularly transmits an optical path header signal (15) including allocation information of the shared time slot and the plurality of lower nodes. Each lower node grasps the shared time slot allocated thereto from the allocation information of the optical path header, and transmits a time-division multiplexed optical signal at the timing when the corresponding shared time slot is in an empty state. The lower node that performs transmission transmits a shared timed slot state signal indicating the state of the corresponding shared time slot in a guard time interval (17). The upper node can designate an ID of a priority node capable of preferentially using the corresponding time slot among the plurality of lower nodes allocated to each shared time slot. The lower nodes other than the priority node wait for transmission until the time slot comes into an empty state.

An in-vehicle communication system and a vehicle. The system comprises a central computing platform, in-vehicle optical communication devices, and at least one optical communication network; the central computing platform communicates with the in-vehicle optical communication devices by means of the optical communication network; the optical communication network comprises optical transmitting units, optical receiving units, at least one optical fiber, and at least one in-vehicle optical communication connector; the optical transmitting units and the optical receiving units are respectively connected to the in-vehicle optical communication connector by means of the optical fiber; the central computing platform is separately communicatively connected to the optical transmitting units and the optical receiving units; the in-vehicle optical communication devices are communicatively connected to the in-vehicle optical communication connector; the optical transmitting units are located around the central computing platform, so that the optical transmitting units and the central computing platform share a cooling system of a vehicle.

The application relates to the field of data center networks, and discloses a wired-wireless hybrid interconnected star-moon matrix data center network architecture and a scheduling method. The architecture comprises a plurality of modularized star-moon units, all the star-moon units are connected through horizontal matrix expansion and vertical hierarchical expansion to form a three-dimensional star-moon matrix network. The architecture has strong compatibility and scene adaptation capability, can be used for full deployment of a newly-built super-large-scale computing center, can be used for local modification and upgrading of an existing data center, can be widely applied to various application scenes such as cloud computing, artificial intelligence training, high-performance computing and edge data center, and has high popularization value and industrial application prospect.

The application provides a quantum-enhanced optical transport network security system and a communication method, and the system is a hardware, software and protocol layer integrated structure, comprising: an optical transport network device and a quantum enhancement unit; the quantum enhancement unit comprises: a quantum measurement sensing module, which establishes a health record of the optical transport network device, matches a security parameter distribution mode based on the health record, and monitors the security state of the optical fiber transmission channel during the security parameter distribution process, and locates the security risk event; based on the security parameter distribution mode, the quantum communication module or the security packaging / restoration module generates security parameters, and distributes the security parameters to each communication node; after the security parameter distribution is completed, the security packaging / restoration module packages and restores the communication information data; and the optical transport network device transmits the packaged communication information data to the target communication node. The application can cover the traditional telecommunication optical transport network, and realizes the quantum security and privacy transmission of the telecommunication optical transport network.

The invention relates to a distributed optical fiber sound wave sensing system and method based on a function decoupling node, the system comprises a server, a terminal, the function decoupling node, a battery pack and a satellite positioning module, and the function decoupling node comprises an optical front-end module and a data processing and returning module. The optical front-end module generates a modulated light pulse, injects the modulated light pulse into the sensing optical fiber, receives and converts a backscattering light signal carrying external sound wave / vibration information into original sensing data; the data processing and returning module is used for receiving a satellite clock signal, packaging original sensing data, adding a timestamp and returning the data to the terminal; the terminal performs data recombination and parallel demodulation in a centralized manner, and uploads demodulated data to the server; the server performs data quality control, analysis, display, and storage. The system supports function decoupling type node series connection or distributed networking, large-scale, low-power-consumption and long-distance deployment is achieved, and the acoustic wave / vibration sensing requirements of scenes such as long-distance oil and gas pipelines, railway lines and mining area peripheries are met.

The invention provides a single-fiber ring network communication control method, a storage medium and a computer program, in the method, a single-fiber ring network comprises a main controller and a plurality of sub-controllers which are connected in series through optical fibers, the main controller receives a frame type control instruction, data corresponding to a frame type is packaged into a frame according to the frame type control instruction, and the frame is sent to the sub-controllers; the frame is sent to a first sub-controller in the plurality of sub-controllers; the first sub-controller processes the frame and forwards the frame to the next sub-controller until all the sub-controllers finish processing and forwarding in sequence, and then the last sub-controller feeds back a processing result to the main controller; wherein each sub-controller is used for controlling the corresponding converter module. According to the invention, the problems of high cost of equipment maintenance and fault processing and high professional requirements caused by high cost, capacity limitation, complex topological structure and the like of the existing optical fiber ring network are solved.

A method implemented by a node in a network utilizing Multiprotocol Label Switching (MPLS) includes performing a convergence procedure to discover the topology of a network in which multiple nodes are arranged; and upon determining that the topology of the network is a ring topology whereby the node is connected to two neighboring nodes by a respective link, creating a first table for a first link, the first table including labels representing at least a portion of a label stack for allowing the node to transmit packets to another node in the network in a clockwise (CW) direction around the ring; and creating a second table for a second link, the second table including labels representing at least a portion of a label stack for allowing the node to transmit packets to another node in the network in an anti-clockwise (ACW) direction around the ring.

The application discloses a DCS control layer network optimization method based on a multi-mode cable small ring network architecture and concretely relates to the technical field of a distributed control system control layer network, and is used for solving the problem of control instruction timing competition and logic conflict caused by path asymmetry in the parallel stage of the existing new and old networks; the method is realized by the following steps: acquiring the transmission delay sequence of the new and old communication paths, analyzing the correlation of transient performance disturbance to determine the path asymmetry root type, deducing the path health state probability vector based on a hidden Markov model, predicting the transient risk probability, generating a differentiated arbitration strategy, and establishing an instruction arbitration mechanism to dynamically select the optimal path control instruction output to the DCS control terminal.