21 results about "Wavelength allocation" patented technology

The application discloses a kind of based on optical communication's multiple RGV things association method and system, the present application relates to the field of multiple equipment collaborative control and optical communication technology in industrial automation logistics system, including the following steps: S1: by the multiaxis adjustable light transceiver module of each RGV carrying real-time acquisition position, motion state and environmental barrier information, generate dynamic light relay priority weight.The multiple RGV things association method and system based on optical communication, through the deep integration of dynamic light relay network and adaptive wavelength allocation technology, significantly improve the communication stability and collaborative efficiency of multiple RGV in complex industrial scene;Based on the node selection mechanism of dynamic light relay priority weight, combined with the mixed integer programming model of elastic channel, realizes the uninterrupted transmission and efficient channel multiplexing of optical communication link in mobile shielding scene.

The embodiment of the invention provides a vehicle-mounted communication method, device and system and a storage medium, and relates to the technical field of communication. The method comprises the following steps: allocating a wavelength channel for each sensor through a dynamic wavelength allocation controller according to the type and communication load of the sensor; according to the wavelength channel allocated to each sensor, generating an optical signal of a corresponding wavelength through a temperature control distributed feedback laser, and modulating data of each sensor to the optical signal of the corresponding wavelength; the modulated optical signals with different wavelengths are input into an array waveguide grating multiplexer to be multiplexed into single-path optical signals, and demultiplexing is carried out through an array waveguide grating demultiplexer to generate data of each sensor; the communication load of each sensor is fed back to the dynamic wavelength allocation controller. According to the method, based on the types of the sensors and the communication loads, wavelength channels are dynamically allocated to different sensors, the time delay of multiplexing and demultiplexing is reduced, and therefore the real-time performance and reliability of vehicle-mounted communication are improved.

The invention discloses a multi-service broadcast light receiving scheduling method and system based on wavelength allocation, and relates to the technical field of optical network communication, and the method comprises the steps: carrying out the combined modeling of the type, time limit and data scale constraint of a service request, a wavelength resource occupation state and an interference risk for a broadcast type WDM multi-service concurrent receiving scene, and obtaining a multi-service broadcast light receiving scheduling model; the method comprises the following steps: dynamically grouping available wavelengths based on service category load prediction to realize a self-adaptive resource boundary according to service attributes; and constructing a comprehensive priority index containing the latest receiving time limit, the service category and the candidate wavelength interference risk, executing ordered cross priority scheduling, arranging a receiving time slot on a target wavelength to generate a wavelength scheduling table and a receiving scheduling table, and finally driving a receiver to tune and receive according to the time slot by using a scheduling instruction. Therefore, while the wavelength utilization rate is improved, the receiving conflict and the delay jitter are reduced, and the key service guarantee is enhanced.

The invention relates to the technical field of wireless networks, and particularly provides a wavelength management method, device and equipment, a medium and a product. The method comprises the following steps: determining at least one candidate wavelength group based on performance parameters of candidate wavelengths; based on the transmission distance of each far-end node, distributing a corresponding first wavelength group to each far-end node from the at least one candidate wavelength group; and carrying out wavelength allocation based on the flow load of each remote node and the corresponding first wavelength group to obtain a target wavelength corresponding to each remote node. Reasonable wavelengths can be allocated to the far-end nodes through wavelength grouping, and resource waste caused by performance difference between different wavelengths is avoided. Moreover, according to the flow load conditions of different remote nodes, the wavelength resources can be allocated more reasonably, and the problem of unreasonable wavelength allocation caused by a single influence factor is avoided. Therefore, the efficiency of wavelength management can be improved.

The invention relates to a cross-layer optical network routing optimization method assisted by a large language model. The method comprises the following steps: constructing a framework of a cross-layer optical network, and collecting network physical node composition, link resource parameters and service request characteristics; designing an auxiliary graph model, and converting a cross-layer network routing optimization problem into a minimum cost path calculation problem in a virtual topology; building an auxiliary graph model weight optimization framework endowed by the large language model, and preliminarily generating an edge weight of the auxiliary graph model by the large language model; calculating a minimum cost path based on the edge weight of the initial auxiliary graph, evaluating a network performance index corresponding to the path, inputting an evaluation result as feedback data into the large language model, and iteratively adjusting the edge weight until the performance index is converged to be optimal; and completing routing planning and wavelength allocation of all service requests in the auxiliary graph model according to the optimal edge weight. According to the method, a large language model and an auxiliary graph model framework are combined, so that the flexibility and the multi-target adaptation capability of routing optimization are improved, and global optimization is realized.

This invention relates to the field of fault prediction technology, specifically to a method for predicting optical fiber network resource faults. The method includes the following steps: obtaining the arrival rate of optical cross-connection requests and the wavelength allocation signaling processing time of the optical network; substituting these into the controller system state space matrix to generate a block tridiagonal transfer rate array; iteratively solving the block tridiagonal transfer rate array to generate a signaling state steady-state probability vector. In this invention, the barcode length shortening rate under continuous time windows continues to be included in the paralysis risk quantification set along with the buffer over-limit probability assessment value. This preserves both the topology contraction trend and the signaling backlog, thus the output network resource fault early warning signal possesses both temporality, structural characteristics, and service stress resistance. It can distinguish between short-term disturbances and sustained instability before the fault manifests, improving the early warning lead time and risk location accuracy.

The utility model relates to optical communication technical field, more specifically, the utility model relates to a kind of high-isolation narrow-band wave division assembly, comprising: optical glass, one end in its first direction is equipped with first filter sheet, and the other end has the reflecting surface corresponding with the first filter sheet;First filter unit and second filter unit are respectively arranged in the two ends of the optical glass second direction, the first filter unit is located on the reflected light optical path of the reflecting surface, and a plurality of light outlets are equally spaced along the first direction on the first filter unit and second filter unit.The utility model provides a kind of high-isolation narrow-band wave division assembly, realizes narrow-band wave division, high-isolation and low loss, to support more flexible wavelength allocation and network upgrade.

The invention belongs to the field of quantum key distribution networks, and discloses a quantum channel wavelength allocation method adaptive to a tidal effect and a related device, and the method comprises the steps: predicting the classical traffic demand of a next time window through constructing a PON service traffic model, and calculating the number of needed wavelengths; judging whether the requirement is met or not according to the current wavelength distribution state: if not, preferentially recovering wavelength resources of a low-frequency quantum channel for classical signal transmission, and if yes, preferentially distributing idle high-frequency wavelength to the quantum signal, and meanwhile, completing key distribution by using the quantum channel to supplement a key pool; and finally, updating the network load state to realize loop optimization. By adopting the method, tidal flow fluctuation can be effectively adapted, resource competition in peak periods can be reduced, classic service congestion and service quality reduction can be avoided, the channel utilization rate in valley periods can be optimized, and efficient coordination of quantum secret communication and classic service transmission can be realized.

This application discloses a multi-frequency radio frequency optical backhaul method and system based on DWDM dynamic wavelength mapping, relating to the field of optical carrier multiplexing technology. The method includes: digitizing multiple radio frequency signals of different frequency bands and performing orthogonal mapping processing based on a preset orthogonal vector group to convert each frequency band signal into mutually orthogonal vectorized sub-signals, forming a composite baseband signal; dynamically selecting a suitable DWDM transmission wavelength according to real-time link crosstalk strength and optical power constraints to optimize signal transmission performance and reduce crosstalk; performing pre-distortion compensation on the composite baseband signal using a nonlinear model of the optical fiber link to offset nonlinear distortion during optical fiber transmission; optically modulating the pre-compensated signal at a dynamically determined wavelength and coupling the signal to a single optical fiber link for transmission using a DWDM optical multiplexer. Through dynamic wavelength allocation and nonlinear compensation, the multi-frequency signal transmission performance is improved, and the capacity and stability of the optical fiber system are optimized.

The invention discloses an optical network path and wavelength allocation method based on an A * algorithm and pheromone scheduling, and relates to the technical field of optical networks, the fast directional search capability of the A * algorithm and the global adaptive optimization characteristic of an ant colony algorithm are fused, and the optical network path and wavelength allocation method based on the A * algorithm and the pheromone scheduling can be realized on the premise of ensuring the wavelength constraint. The service blocking rate is obviously reduced, and the resource utilization rate of the whole network is improved.

The invention discloses a satellite optical network load balancing routing and wavelength allocation method, and relates to the field of satellite optical communication. The method comprises the following steps: establishing a dynamic simulation environment of a satellite optical network; defining a node as an agent, for an arriving service request, starting from a source node agent, taking a current node on a path as an active agent, and selecting a next hop node through deep reinforcement learning until a destination node is reached, thereby forming a candidate path and a to-be-allocated wavelength set; and calculating an allocation metric value for each wavelength to be allocated, and selecting the wavelength with the maximum allocation metric value as the optimal wavelength to be allocated to the current service. According to the method, the use condition of the wavelength in the satellite optical network is sensed through the intelligent agent, the path bypassing the blocking area is selected to avoid cascade blocking, the problem of local congestion on the satellite caused by unbalanced distribution of ground services in geography and time can be effectively solved, the service blocking rate is remarkably reduced, and the network load balancing degree is achieved.

This optical communication system comprises a first conversion unit, a multiplexing unit, a separation unit, and a second conversion unit. The first conversion unit converts a first signal of a high-priority first user into a first optical signal having a first wavelength shorter than a predetermined wavelength, and converts a second signal of a low-priority second user into a second optical signal having a second wavelength longer than the first wavelength. The multiplexing unit wavelength-multiplexes the first optical signal and the second optical signal and outputs the wavelength-multiplexed signals to an optical transmission line. The separation unit performs wavelength separation on the first optical signal and the second optical signal transmitted through the optical transmission line. The second conversion unit converts the separated first optical signal into a third signal and outputs the third signal to an output destination corresponding to a communication destination of the first user, and converts the separated second optical signal into a fourth signal and outputs the fourth signal to an output destination corresponding to a communication destination of the second user.

The invention relates to a wavelength hard isolation method, which comprises the steps of planning a wavelength allocation scheme of each safety partition, and determining the number of wavelength channels and a waveband allocation strategy based on a power grid network topology structure, a transmission distance range and an expected capacity demand; a wavelength routing strategy of the OLT equipment is configured, and wavelength sets of different security partitions are multiplexed to single fiber transmission through a wavelength multiplexer; oNU terminal devices are configured, each ONU terminal device is provided with a wavelength selective optical filter in advance, and only the specified wavelength of the corresponding security partition is received; and verifying the physical isolation performance of each wavelength channel to ensure that the power grid security partition requirement is met. Different wavelength routing strategies are configured on OLT equipment, a wavelength selective optical filter is preset on ONU terminal equipment, only specified wavelengths of corresponding safety partitions are received, hard isolation of different areas according to the wavelengths is achieved, and safety protection regulations of an electric power monitoring system are met.

This invention addresses the high time complexity of existing routing and wavelength assignment (RWA) algorithms in multi-fiber networks equipped with blocking optical cross-connects (OXCs). It discloses a progressive first-hit routing and wavelength assignment method and apparatus based on an auxiliary graph. This method leverages the characteristic that the result of most requested RWA requests can be determined solely through link-state information. It initially attempts to execute RWA using almost exclusively link-state information. Only when optical path establishment fails due to internal OXC congestion will it simultaneously use link-state information and exchange OXC states to re-execute RWA. This invention, while ensuring no loss of network non-blocking performance, significantly reduces the algorithm's runtime by several orders of magnitude compared to existing algorithms. It provides strong technical support for the application of large-scale blocking OXCs in future multi-fiber networks, demonstrating excellent practicality and broad application prospects.

The application discloses a practical anti-noise quantum correlation auxiliary multi-user entanglement distribution quantum network, which comprises a network user shared entangled photon pair source, a wavelength distribution module, an optical fiber link and a polarization analysis module. The network user shared entangled photon pair source introduces frequency-related quantum correlation in a polarization entangled photon pair, and extracts entangled photons from noise through frequency correlation. The wavelength distribution module selects different frequency entangled photon pairs according to the frequency degree of freedom, and sends the entangled photon pairs to a specific user pair through a noise-containing optical fiber link, so that each user randomly selects a measurement base vector, and polarization encoding and decoding are performed by using the polarization analysis module to extract signal photons from noise photons, and a single-photon detector is used to detect photons to establish a secure key, and information is securely shared. The application can establish a secure key under limited key analysis, and realizes information security sharing among users.

The invention belongs to the technical field of satellite network communication, and discloses a satellite network communication route wavelength allocation method and device, equipment and a storage medium. According to the method, through constellation configuration and a physical topological graph of a satellite network in a period of time, initial paths are planned for all communication node pairs in the network, wavelengths are bound, and a complete to-be-optimized scheme is formed; and performing iterative local disturbance and repair adjustment on the initial scheme based on a group of neighborhood operator sets of which the weights can be dynamically changed through a self-adaptive optimization mechanism, and outputting a target routing wavelength allocation scheme which is more optimized in global wavelength resource occupation when a convergence condition is met. According to the method, the application weight can be dynamically adjusted according to the historical efficiency of the strategy, so that the search process is more intelligently guided to jump out of local optimum and a better solution is efficiently explored in the face of complex network constraints, finally, the total amount of wavelength resources required by communication is systematically reduced, and the overall utilization efficiency of satellite network resources is improved.

The invention relates to a method for checking a wavelength shift on a detector (2) in a spectrometer (1), wherein the spectrometer (1) comprises a sample unit (3) and the detector (2), wherein the sample unit (3) is configured to generate light characteristic of a sample, wherein the detector (2) has a plurality of pixels and is configured to detect the generated light as a spectrum, wherein the method comprises at least the following steps: - Creating an initial wavelength mapping by assigning wavelengths to the pixels of the detector (2), - Recording a first spectrum of a sample for which the first wavelength assignment is valid, - Recording a second spectrum of the sample, - Determining a wavelength shift between the first spectrum and the second spectrum by comparing the first spectrum and the second spectrum, - Creating a second wavelength assignment, whereby wavelengths are assigned to the pixels in the second spectrum based on the determined wavelength shift.

A satellite system is disclosed including a plurality of optical modems with digital signal processing circuitry supporting programmable modulation formats. A processor assigns subsets of the modems to establish inter-satellite links and ground links, and selects modulation formats based on link performance requirements such as connection distance and bandwidth demand. The system enables an express mesh inter-satellite topology, providing direct optical links among satellites positioned according to ground traffic sources and sinks, thereby reducing the number of hops, network latency, and power consumption. The processor may further adjust forward error correction coding, transmitted optical power, and wavelength allocation to optimize link performance. Satellites may dynamically reassign modems, power down unused modems, and operate in Low Earth Orbit (LEO) or Medium Earth Orbit (MEO). The disclosed methods and architectures allow efficient, low-latency satellite networking through coherent optical communications adaptable to evolving traffic patterns and environmental conditions.

A wavelength defragmentation apparatus for executing wavelength reallocation for a path in an optical transmission network, the wavelength defragmentation apparatus comprising: a storage unit that stores a path information database (DB) and a wavelength allocation management DB; and a wavelength defragmentation functional unit that refers to an attribute of a path from the path information DB and performs wavelength reallocation of a path having the attribute by an operation corresponding to the attribute.

The invention discloses a power grid single-fiber wavelength division optical transmission method and device with a self-adaptive configuration scene, and relates to the field of single-fiber wavelength division, and the method comprises the following steps: 1, collecting the types, bandwidth requirements and transmission distance characteristics of a multi-path dual-core service in a power grid communication access network, generating an initial configuration strategy of the DWDM system or the CWDM system according to the transmission distance threshold and the bandwidth density requirement; step 2, extracting the number of configured or to-be-configured services, the service types, the bandwidth fluctuation range and the QoS level, and quantifying into three actual influence indexes of a channel occupancy rate, a wavelength interference risk factor and a service key coefficient; a pre-trained prediction matching model is utilized to output a wave channel number optimal solution and a wavelength allocation sequence, wavelength allocation is adaptively adjusted according to dynamic changes of power grid services, wavelength conflicts are effectively suppressed, adjacent wave channel intervals are compressed, aggregation transmission of more dual-core services is achieved in a single fiber, and the optical fiber spectrum utilization rate and the port resource utilization rate are improved.