1158 results about "Fiber-optic communication" patented technology

The invention relates to the technical field of communication, and discloses an optical fiber performance automatic test method, system and device based on optical power detection. The method comprises the following steps: carrying out intelligent scanning detection on an optical fiber network, generating optical fiber resource mapping data, obtaining an OTDR measurement configuration table through dynamic analysis, executing optical pulse injection and signal acquisition to obtain a time domain response characteristic curve, obtaining an optical fiber performance parameter set through wavelet denoising and peak value identification processing, and obtaining the optical fiber performance parameter set. And performing fault analysis by using deep learning and expert rules to obtain diagnosis decision data, and finally generating an optical fiber state evaluation report through digital twin modeling. According to the invention, remote automatic testing, intelligent fault diagnosis and visual monitoring management of the optical fiber network can be realized, and the operation and maintenance efficiency and reliability of the optical fiber communication network are improved.

The invention relates to the technical field of optical fiber communication monitoring, in particular to a passive optical fiber multi-parameter digital twin drive abnormal root cause positioning method and system. Collecting temperature, stress, acoustics and polarization signals, and constructing a time domain, frequency domain and energy domain coupling feature tensor and time sequence data set; performing nonlinear dimension reduction and feature decoupling by using a beta-VAE model, and dynamically quantifying contribution of each parameter to anomaly by using an integral gradient to form a contribution degree vector group; constructing a PINN digital twinborn model embedded with heat conduction and elasto-optical effects, and predicting a normal fluctuation range under contribution vector weighting and data-physics dual constraints; modeling measurement and prediction deviations under the guidance of contribution vectors, and outputting an abnormal measurement score, confidence, a position and a time sequence; and a causal graph neural network is constructed, topology and abnormal events are fused for tracing causes, a fault source is identified, and the model is subjected to closed-loop calibration. According to the invention, data driving and a physical mechanism are fused, and accurate detection and root cause positioning of the abnormity of the optical fiber system are realized.

The invention provides a digital twin hydrological station system which is characterized in that the system comprises a layered architecture system and a multi-dimensional safety protection mechanism, the layered architecture system is composed of a sensing layer, a transmission layer, a data layer, a model layer, an application layer and a display layer from bottom to top, the sensing layer comprises a heterogeneous hydrological monitoring equipment cluster, and the transmission layer comprises a heterogeneous hydrological monitoring equipment cluster. The equipment cluster is provided with a water level sensor array, a Doppler flowmeter, a spectrum water quality analyzer and an environment monitoring terminal, and total element acquisition of hydrological element data, equipment operation state data and environment data is realized; the transmission layer adopts a hybrid communication protocol stack, integrates an ultra-short wave communication module, an NB-IoT narrowband communication module and an optical fiber communication module, and constructs a multi-path redundant transmission channel, and a key data transmission channel is configured with a dynamic link selection algorithm; the data layer comprises a distributed storage architecture, adopts a mixed storage mode of a relational database cluster and an unstructured database, and is internally provided with a data cleaning engine and a spatio-temporal data fusion module.

The invention provides a hollow-core optical fiber cable fiber breakage detection method based on a reference optical fiber and an optical cable, and belongs to the technical field of optical fiber communication. The method comprises the following steps: acquiring monitoring data of a reference optical fiber in a hollow-core optical fiber cable, and performing quality evaluation on the data to generate a signal quality comprehensive score; when the score is higher than a preset threshold value, feature extraction and dynamic weighted fusion are carried out to generate a comprehensive feature vector; outputting a fiber breakage probability by using the fiber breakage state recognition model, calculating a fiber breakage risk value through a prediction model in combination with time sequence data, and obtaining a fiber breakage risk index through a risk fusion algorithm; and finally, matching and executing a hierarchical response strategy according to the risk index. According to the invention, multi-modal data fusion, intelligent state identification and active early warning are realized, and the reliability, precision and operation and maintenance efficiency of broken fiber detection are significantly improved.

The invention relates to the technical field of health management of optical fiber communication equipment, and discloses an optical fiber connector life prediction system based on digital twinning and multi-parameter fusion, which comprises a data acquisition module, a data preprocessing module, a feature extraction module, a model construction module, a fusion analysis module and a life prediction module. According to the optical fiber connector service life prediction system based on digital twinborn and multi-parameter fusion, multi-dimensional data is formed through the data acquisition module, complete and associated data support is provided for subsequent feature extraction and service life analysis, and a digital twinborn model is constructed based on three-dimensional structure parameters and material attributes of the optical fiber connector, so that the service life of the optical fiber connector is predicted. The virtual model can accurately reflect the structural state change of a physical entity in real time, in addition, the fusion feature vector and the structural state parameter are subjected to joint analysis, a comprehensive evaluation index capable of reflecting the association of the fusion feature vector, the structural state parameter and the comprehensive evaluation index is output, an accurate multi-dimensional evaluation basis is provided for life prediction, and then the life condition of the optical fiber connector is accurately predicted.

The invention discloses an optical fiber vibration signal time identification and classification method, system and device based on a Mam-YOLOv10 neural network and a medium, and belongs to the technical field of optical fiber communication, and the method comprises the steps: obtaining OTDR signals of a plurality of targets based on an optical fiber vibration signal collection system, and carrying out the denoising of the OTDR signals; performing short-time Fourier transform on the de-noised OTDR signal to obtain a two-dimensional time-frequency diagram of the vibration signal; based on the two-dimensional time-frequency diagram, multi-scale features of the optical fiber vibration signals are extracted; and inputting the multi-scale features into a Mam-YOLOv10 neural network containing a Mama attention block to complete identification and classification of the optical fiber vibration signals. According to the method, the influence of interference fading on the pattern recognition accuracy is effectively reduced, meanwhile, the hardware complexity is reduced, the attention weight is automatically adjusted according to different fault scenes and data characteristics, and the accuracy of optical fiber fault recognition and classification is improved.

The invention relates to the technical field of intelligent communication, and discloses an end-to-end optimization method, a signal constellation geometry and probability joint shaping optimization method in an end-to-end intelligent communication system, and a communication device based on a neural network. According to the method, a transmitter is constructed by using a neural network, and a received signal passes through a two-stage equalization processing system to form an end-to-end optimization framework without assistance of a channel model. The transmitter adopts a modular design, can realize joint optimization of constellation probability shaping (PS) and geometric shaping (GS), and performs joint updating on all trainable parameters of the system based on a total loss function containing an equilibrium error and a decoding error through a back propagation algorithm. According to the invention, computing resources are effectively saved; the two-stage equalization system can accurately compensate channel damage, the realized PS and GS joint optimization can significantly improve the performance of the communication system and reduce the bit error rate, and the method has good performance advantages and practical value in an actual optical fiber communication system.

The invention provides an intelligent optical fiber distribution equipment health degree analysis method and device, and belongs to the technical field of optical fiber communication. A global LSTM model is constructed, and initialized global model parameters are issued to each intelligent optical fiber distribution equipment for local LSTM model training; and executing a parameter alignment compensation and parameter aggregation strategy on the global LSTM model by using the local training parameters obtained by each intelligent optical fiber wiring device, obtaining updated global model parameters, issuing the updated global model parameters to the local LSTM model of each intelligent optical fiber wiring device, and evaluating the current health state of each intelligent optical fiber wiring device. Through a distributed federated learning framework, local data distributed training and global model aggregation of intelligent optical fiber distribution equipment are realized, data such as optical power loss and plugging times are monitored and analyzed in real time, potential health risks are found in time, equipment damage caused by problem accumulation is avoided, and adaptability and accuracy of equipment health degree monitoring are improved.

The invention provides an intelligent flight control integrated system for a large unmanned aerial vehicle, and the system comprises a multi-mode environment sensing module, a self-adaptive flight control module, a dynamic power management module, a distributed communication architecture module, an intelligent task decision module, and a fault self-repairing system. The multi-mode environment sensing module is connected with the adaptive flight control module through a bidirectional real-time data bus, and transmits environment sensing data to the intelligent task decision module through an optical fiber communication redundant link; the dynamic power management module is connected with each function module through an intelligent power distribution matrix, and the intelligent power distribution matrix comprises a 16-channel programmable MOSFET array. Through cross-module collaborative design (perception-control-energy-communication) and physical constraint embedding (moment balance and optical fiber mechanical protection), the system has comprehensive advantages in the aspects of environmental adaptability, energy efficiency management, communication reliability, extreme fault tolerance and the like, and the performance boundary of a traditional unmanned aerial vehicle system is remarkably exceeded.

The invention relates to an electric power communication optical fiber fault monitoring and visualization method and system, and belongs to the technical field of optical fiber communication monitoring, and the method comprises the following steps: carrying out the real-time monitoring of an electric power communication optical fiber through a non-intrusive monitoring system, collecting an optical power signal in real time, and constructing an optical fiber resource database; when the non-intrusive monitoring system detects that optical power attenuation exceeds a preset threshold value, an optical time domain reflectometer OTDR is started to perform intrusive detection on an abnormal optical fiber, and an OTDR echo curve is obtained; extracting a composite feature vector of an OTDR echo curve, and identifying a fault type through a multi-stage fusion algorithm in combination with historical fault record data; according to the OTDR detection point coordinates, the optical path distance and the geographic information data, the position of a fault point is calculated, and the optical fiber topology, the position of the fault point and the fault type of the fault point are displayed in a visual interface. According to the invention, accurate fault identification and quick response are realized, and the operation and maintenance efficiency is improved.

The invention discloses a ship-shore safety connection system with efficient communication and safety protection, and particularly relates to the technical field of electric power and data connection of ships and shore bases, which comprises a medium-voltage composite optical fiber shore power cable, a dual-system electrical transmission system, a third-party linkage control center and a layered insulation monitoring module, the medium-voltage composite optical fiber shore power cable adopts a double-layer anti-torsion protective sleeve and an anti-electrostatic shielding layer, a double-system electrical transmission system is integrated with a broadband voltage self-adaptive module and a high-speed optical fiber communication repeater, the system realizes ship-shore potential difference monitoring and redundancy switching through a three-way data link, and a layered insulation monitoring module is used for positioning a fault point in real time. Besides, an environment reinforcing assembly, a multi-stage early warning mechanism and a communication line self-healing function are further arranged, the problems that a traditional system is poor in compatibility, low in communication efficiency and insufficient in safety protection are solved, and the system is suitable for efficient and safe connection between the ship and the shore base.

The invention discloses an on-line monitoring multi-main-path power optical fiber automatic switching protection system and method, and belongs to the technical field of optical fiber monitoring and diagnosis, and the system comprises a main control module, an OTDR module, an optical switch module, and a routing and Ethernet module. Wherein the OTDR module monitors optical terminal equipment in real time to obtain optical fiber communication data; the main control module processes the optical fiber communication data by adopting an FPGA (Field Programmable Gate Array), compares the processed data with a preset threshold value and generates a switching decision instruction and alarm information; the routing and Ethernet module uploads the real-time state data of the optical fiber to an upper computer; receiving and responding to the alarm information; a switching instruction generated by the FPGA is issued to the optical switch module; and the optical switch module responds to the switching decision instruction generated by the main control module and executes physical channel switching of multiple paths of optical fibers. According to the invention, stable execution of data transmission and data processing can be ensured, and the stability and rationality of optical fiber automatic switching protection are improved.

The invention discloses an optical fiber signal transmission system and method based on quantum noise encryption, and relates to the technical field of optical fiber communication, and the system comprises a composite modulation transmitting module, a dispersion compensation relay module, a coherent receiving module and a digital signal processor. The composite modulation transmitting module comprises an electro-optical modulator and a quantum noise randomization encoder; the dispersion compensation relay module comprises an adjustable dispersion compensator and a Raman amplifier; the coherent receiving module comprises a local oscillator laser and a 90-degree optical mixer; a digital signal processor includes a clock recovery unit and a maximum likelihood sequence detector. All the modules are sequentially connected and cooperatively work. And the adjustable dispersion compensator dynamically applies reverse dispersion compensation calculated based on a dispersion coefficient and a transmission distance according to the dispersion amount monitored in real time. According to the invention, through technologies of quantum noise encryption, dynamic dispersion compensation, Raman amplification, coherent reception and the like, safe and efficient transmission with single-wave 400Gbps and 100km transmission bit error rate less than or equal to 1 * 10 <-12 > is realized.

The invention discloses an isomorphic four-core hollow-core anti-resonance optical fiber for an ultraviolet band photoetching process, which belongs to the technical field of optical fiber communication, and comprises an outer cladding and four isomorphic hollow-core light guide units which are arranged in the outer cladding and are distributed at equal intervals in a rectangular array manner, anti-resonance structures are symmetrically arranged in each isomorphic hollow-core light guide unit in the vertical direction and the horizontal direction, and the anti-resonance structures enclose to form an air fiber core; the anti-resonance structure is formed by nesting a plurality of layers of circular and elliptical anti-resonance tubes. And the four isomorphic hollow-core light guide units respectively work in the wavelength ranges of 280 to 380 nm, 220 to 280 nm, 160 to 220 nm and 100 to 160 nm. The isomorphic four-core hollow-core anti-resonance optical fiber structure provided by the invention has a multi-channel transmission capability, and is suitable for multi-beam parallel transmission in a high-resolution ultraviolet lithography system.

Disclosed are systems and methods that employ distributed fiber optic sensing (DFOS) / distributed acoustic sensing (DAS) to monitor and provide real-time estimation of ice thickness on fiber optic communications facilities, and which integrate DSA data with a hybrid processing technique that combines frequency domain decomposition (FDD) and stochastic subspace identification (SSI). Aspects of our innovative systems and methods include: i) Hybrid Signal Processing Techniques; ii) Real-time, Continuous Ice Monitoring; iii) Enhanced Noise Robustness and Non-linear Dynamics Handling; and iv) Adaptability and Scalability.

The invention relates to the technical field of optical fiber communication and sensing, and discloses an optical fiber coding and positioning integrated sensing device based on frequency division multiplexing and an application method, and the optical fiber coding and positioning integrated sensing device comprises a light source module, a coupler module, a frequency division multiplexing module, a sensing optical fiber network, a signal demodulation module, a positioning sensing module and a main control unit. According to the optical fiber coding and positioning integrated sensing device based on frequency division multiplexing and the application method thereof, a light source module generates broadband continuous optical signals, a coupler module realizes optical signal coupling and separation, a frequency division multiplexing module integrates sub optical signals, and an optical fiber sensing unit of a sensing optical fiber network senses and encodes external physical quantities. The positioning sensing module realizes accurate positioning, the signal demodulation module separates sub optical signals and extracts information, the main control unit operates in a coordinated manner, processes and analyzes data and outputs a result, all the modules cooperate to form an efficient and stable monitoring system, the requirements for multi-physical-quantity synchronous monitoring and accurate position positioning in a large-scale and long-distance scene are met, and the system performance is improved.

The invention provides an optical fiber transmission receiving signal prediction model training method, a prediction method and equipment, and relates to the technical field of transmission, and the training method comprises the steps: generating a training sample corresponding to a transmitting signal according to the transmitting signal generated by a transmitting end in a continuous spectrum nonlinear frequency division multiplexing system in advance, and training a neural network model based on the training sample to perform mixed domain feature extraction, multi-scale processing and attention feature extraction based on a peak perception attention mechanism on the training sample to obtain received signal prediction result data and optimize the neural network model so as to train the neural network model as an optical fiber transmission received signal prediction model. According to the method and the device, the received signal in the continuous spectrum nonlinear frequency division multiplexing system can be predicted, the accuracy of performing received signal prediction by adopting the trained optical fiber transmission received signal prediction model can be improved, and further the research and development period of the modeling process of the optical fiber communication system and the computing resource consumption of research and development equipment can be reduced.

The invention relates to the technical field of optical fiber communication, in particular to a hollow-core optical fiber of a nested structure. The hollow-core optical fiber with the nested structure comprises an outer cladding, a fiber core area located in the center of the optical fiber and a plurality of anti-resonance tube units, each anti-resonance tube unit is composed of a cladding tube and at least three nested tubes; the cladding tubes are arranged around the fiber core area in a radial distribution mode, and the outer cladding layer tightly surrounds the cladding tubes. The circle center point of each cladding tube is the same as that of the center nested tube in the cladding tube, and the outer nested tubes are arranged on the two sides of the center nested tube and symmetrically distributed with the center nested tube as the center, so that a negative curvature nested structure is formed. The cladding tube surrounds the fiber core to form an anti-resonant cavity for optical signals, light leakage to a cladding area is reduced, the anti-resonant effect is enhanced through the negative curvature structures of the cladding tube and the nested tube, the binding capacity of the optical signals in the fiber core is improved, and meanwhile the long-distance low-loss optical transmission characteristic is achieved.

The invention discloses an optical fiber network intelligent regular checking and fault closed-loop processing system, method and device, and belongs to the technical field of optical fiber communication network intelligent operation and maintenance. The method comprises the following steps: collecting and fusing multi-source heterogeneous data such as resource management, fault network management, distributed sensing and geographic information; a multi-modal model based on a convolutional neural network and a graph neural network is utilized to analyze fusion data, meter-scale accurate positioning of faults is achieved, and a regular inspection plan is dynamically optimized by adopting a long and short-term memory network model; and based on an analysis decision result, a fault list, a mode list and a maintenance list are automatically created, circulated and associated, and a whole-process closed loop from diagnosis list sending to repair verification is realized. According to the scheme, the problems of data dispersion, single analysis dimension and lack of closed loop in the process in the prior art are solved, and the accuracy, efficiency and automation level of optical fiber network operation and maintenance are remarkably improved.

The invention relates to the technical field of optical fiber communication, in particular to a thin-film lithium niobate electro-optical modulator of a stepped electrode, which comprises a substrate, a buffer layer, an optical waveguide, a metal electrode and a transition layer, the optical waveguide is an X-shaped or Y-shaped cutting LN film, a traditional ridge-shaped structure is adopted, the optical waveguide is bonded to the thick SiO2 buffer layer on the substrate, the film can be prepared through various technologies such as ion implantation, wafer bonding and hot slicing, and in order to improve the electro-optical overlapping coefficient and reduce light absorption loss, a silicon dioxide transition layer is used for connecting the metal electrode and the optical waveguide. The metal electrode is of a stepped structure, the electrode can effectively reduce electrical loss and obtain high bandwidth, and the electrode is used for generating an electric field in the aspect of photoelectric efficiency; the electric field is used for changing the functional characteristics of the thin-film lithium niobate layer and further changing the optical transmission characteristics of the waveguide, so that electro-optical modulation is realized. Therefore, the problem that an existing electro-optical modulator is low in modulation efficiency is solved.

The invention relates to an optical fiber power 24-path synchronous measurement method and system based on leakage light, and belongs to the technical field of optical fiber communication monitoring. The method comprises the steps that bending force is applied to a to-be-measured optical fiber through a micro-bend clamping coupler, and a leakage light signal is captured through a V-shaped angle positioning structure and a double-photosensitive sensor; and high-precision conversion and amplification of optical-electric signals are realized by combining 24 paths of parallel InGaAs-PIN photodiode arrays and a high-speed logarithmic amplifier. 24 paths of signals are synchronously acquired through an SPI protocol by adopting a master-slave single-chip microcomputer architecture, data processing is performed by combining a moving average filtering algorithm and a voltage-optical power conversion algorithm, and finally real-time monitoring of multi-channel optical power is realized through a data transmission interface. The device supports modular design, has the advantages of being non-invasive, low in additional loss, short in response time and the like, and is suitable for multi-channel online monitoring and maintenance of an optical fiber communication network.

A fiber optic-based communications network includes: a power insertion device, connected to multiple fiber links from a data source, configured to provide power insertion to a hybrid fiber / power cable connected to at least one fiber link of the multiple fiber links; the hybrid fiber / power cable, connecting the power insertion device to a connection interface device, configured to transmit data and power from the power insertion device to the connection interface device; and the connection interface device, configured to provide an interface for connection to an end device via a power over Ethernet (POE)-compatible connection and to provide optical to electrical media conversion for data transmitted from the power insertion device to an end device via the hybrid fiber / power cable and the PoE-compatible connection.

The invention discloses a relay device and method for long-distance few-mode optical fiber communication, and belongs to the field of optical communication. According to the device, firstly, optical signals transmitted in a few-mode optical fiber are separated into a plurality of independent mode channels through a mode decomposition multiplexer; then, an adjustable light delay unit is configured in each channel, and compensation is carried out according to a difference mode group delay difference pre-calculated or actually measured by a few-mode optical fiber parameter; furthermore, a dimmable amplifier is used for amplifying the signal, power monitoring is carried out at the output end of the amplifier through an optical fiber beam splitter and a photoelectric detector, closed-loop feedback control is formed, and gain of each channel is adjusted in a self-adaptive mode to eliminate mode-dependent loss. According to the invention, signal distortion can be effectively suppressed in an optical domain, the complexity of digital signal processing of a receiving end is reduced, and the transmission distance and the transmission capacity of a few-mode optical fiber mode division multiplexing communication system are remarkably improved.

The utility model relates to the technical field of optical fiber communication, and discloses a polarization equalization transmitting assembly based on a coherent light silicon optical chip, which adopts a second optical splitter with an adjustable splitting ratio to split input continuous light and equalizes output light power of two paths of coherent light of X polarized light and Y polarized light. The two paths of coherent light of X polarized light and Y polarized light can be pre-adjusted only by adjusting the splitting ratio of the second optical splitter, optical power balance is achieved, high-speed electro-optical modulators in the two paths of coherent light do not need to be adjusted, the high-speed electro-optical modulators can be kept in the optimal state, an adjustable optical attenuator does not need to be additionally arranged in the two paths of coherent light, and the optical power balance is achieved. The utility model has the effects of improving the output power of the transmitting assembly, reducing the self power consumption of the transmitting assembly and improving the utilization efficiency of the high-speed photoelectric driver, and is more suitable for a small-sized packaged coherent optical module based on a coherent optical silicon optical chip.

The invention relates to the technical field of optical fiber communication device detection, and provides an optical fiber connector end face 3D shape detection method and system, and the method comprises the steps: obtaining a multi-step phase shift interference image sequence of an optical fiber connector end face; performing interface segmentation on the multi-step phase shift interference image sequence by adopting a fiber core boundary detection network based on radial gradient perception to obtain interface position data; based on the interface position data and the multi-step phase shift interference image sequence, performing phase unpacking by adopting a dual-coordinate system fusion phase unpacking algorithm to obtain initial phase data; performing global reconstruction on the initial phase data by adopting a regional confidence coefficient weighted reconstruction algorithm to obtain global phase field data; performing spherical parameter fitting on the global phase field data by adopting an IEC (International Electrotechnical Commission) standard constraint hierarchical particle swarm optimization algorithm to obtain spherical geometric parameters; and generating a 3D shape detection result of the end face of the optical fiber connector according to the spherical geometric parameters. According to the invention, the precision and reliability of 3D shape detection of the end face of the optical fiber connector are improved.

The invention relates to the technical field of optical fiber communication, and provides an optical transmission system fault positioning method and device based on digital twinning and a medium. The method comprises the steps that physical models of all parts of the optical transmission system are combined, a neural network model is constructed through monitoring data, and data processing, data fusion and data cleaning technologies are adopted; acquiring performance data during fault simulation by utilizing a single-channel fault, an amplifier fault and an optical fiber fault of the digital twin simulation optical transmission system, matching the simulated fault type and fault degree with the corresponding performance data, and establishing a fault feature database; designing a fault positioning neural network, taking the performance data in the fault feature database as input data, and taking corresponding fault types and fault degrees as output data; when the optical transmission system breaks down, performance data monitored by the system are obtained and input into the trained neural network, and fault positioning is completed.

The invention discloses a cascade architecture power electronic control and protection device and a high-frequency carrier generation method. The cascade architecture power electronic control and protection device comprises a controller, an optical port case and a plurality of power modules, the controller is provided with a high-speed optical fiber communication interface, each optical port case is provided with a high-speed optical port and a plurality of low-speed optical fiber communication interfaces, and the high-speed optical port is connected with the high-speed optical fiber communication interface of the controller through a high-speed optical fiber; each power module is connected with one low-speed optical fiber communication interface through a low-speed optical fiber, and each power module is used for receiving a control signal through the optical port case. The method can be applied to various power electronic products in a butt joint mode, the calculation burden of a controller is reduced, and large-capacity high-frequency carrier processing can be completed without a high-performance controller.

A virtual fiber communication system includes a central cloud server that obtains telemetry information from network nodes of wireless backhaul mesh network. The telemetry information includes spectrum occupancy information and UE positioning information. The central cloud server obtains, via blockchain-based spectrum broker nodes, frequency spectrum availability metadata and custom-defined spectrum access parameters of spectrum owner nodes. The central cloud server detects spectrum availability variations across network nodes and determines different routing paths for the first type of UEs designated as premium users. Based on the detected spectrum availability variations across the network nodes and the determined different routing paths, control signals are generated and communicated to the network nodes to assign data streams onto rented or leased spectrum frequencies. One of the determined routing paths is selected for delivery of the data streams to the first type of UEs to meet the custom-defined spectrum access parameters.

The invention relates to the technical field of optical fiber communication equipment, and discloses an optical fiber splice closure with a positioning function and an application system. The junction box body is composed of a bottom box frame and a top box cover, the top box cover is installed at the top of the bottom box frame through bolts, pipe inlet holes are formed in the two sides of the junction box body, and the pipe inlet holes are used for leading external optical fiber pipes into the junction box body; the bottom box frame is provided with a welding disc, the welding disc is used for connecting optical fiber pipe joints, the top of the welding disc is provided with a low-frequency RFID positioning module, and through the arrangement of the low-frequency RFID positioning module on the optical fiber splice closure, when optical fiber pipe transmission goes wrong, through a positioning management system, the optical fiber splice closure can be accurately positioned. A worker can quickly obtain the position information of the fault junction box and formulate an optimal maintenance route, so that the maintenance efficiency is improved, the network interruption time caused by a fault is reduced, and the stable operation of a communication network is ensured.

The invention discloses a hollow-core optical fiber communication method and system for reducing complexity, and the method comprises the steps: obtaining original bit data, and mapping the original bit data to an initial constellation diagram through a quadrature amplitude modulation mapping algorithm; rotating the initial constellation diagram according to a preset rotation angle to obtain a first constellation optimization diagram, adjusting the first constellation optimization diagram by using a sparrow search algorithm to obtain a second constellation optimization diagram, converting the second constellation optimization diagram into a transmission signal, and transmitting the transmission signal to the receiving end through a hollow-core optical fiber; performing data preprocessing on the received transmission signal to obtain a de-noised signal, performing phase recovery on the de-noised signal based on a quadratic algorithm to obtain a second constellation optimization graph, and performing de-mapping on the second constellation optimization graph to re-convert the second constellation optimization graph into original bit data; according to the invention, the complexity of digital signal processing is reduced, and the accuracy and efficiency of phase recovery are obviously improved, so that the performance of a coherent optical communication system based on the hollow-core optical fiber is comprehensively improved.