667 results about "Satellite network" patented technology

The invention discloses a low earth orbit satellite network digital twin drive switching optimization method and system, and relates to the technical field of inter-satellite communication, and the method comprises the steps: building a digital twin system which is synchronously evolved with a physical LEO satellite network; predicting the link quality between each candidate satellite and the user terminal in a future time window based on a digital twin system; dividing a time window into a plurality of continuous time slices, constructing a directed weighted dynamic graph model which takes a satellite-time slice as a node and takes link comprehensive utility cost as an edge weight, and searching an optimal path in the directed weighted dynamic graph model by utilizing a shortest path algorithm so as to determine an optimal switching opportunity and a target satellite sequence; the optimal switching strategy is issued to a user terminal to be executed, and a link quality prediction result is corrected in real time through a feedback mechanism of the digital twin system to form closed-loop optimization; the method can effectively meet differentiated service quality requirements in a multi-service scene, and is suitable for a high-dynamic LEO satellite communication system.

A routing method for supporting differential service requirements in a satellite internet comprises the following steps: step 1, constructing multi-dimensional network state perception as a base layer which is responsible for collecting and quantifying physical states and logic states of a satellite network in real time, and obtaining objective network states and subjective QoS (Quality of Service) requirements of services; 2, generating a nonlinear adaptive weight driven by a service as a strategy layer, mapping an objective network state and a subjective QoS (Quality of Service) demand of the service, dynamically adjusting the value orientation of routing judgment, and generating a dynamic weight; and step 3, taking the dynamic cost routing decision as an execution layer, calculating the comprehensive cost based on the dynamic weight, and executing next hop selection and path maintenance, and through cooperative work of the dynamic cost routing decision, the comprehensive cost and the next hop selection and path maintenance, realizing intelligent path selection and high-reliability transmission for different service flows in a high-dynamic and resource-limited environment of the low-orbit satellite. According to the invention, while the routing computation overhead is effectively reduced, multiple requirements of differentiated services on low time delay and high reliability can be considered.

A communication method and a related device, applicable to a non-terrestrial network (NTN) communication scenario such as a satellite network. In the method, a terminal device receives first information sent by a network device, where the first information includes N pieces of configuration information, the N pieces of configuration information are respectively used to configure N communication resources, and N is an integer greater than 1; the terminal device receives second information sent by the network device, where the second information indicates M communication resources in the N communication resources, and M is a positive integer less than or equal to N; and the terminal device measures at least one of the M communication resources.

The invention discloses a service scheduling method and system for a photoelectric hybrid low earth orbit satellite network, and relates to the technical field of satellite communication and network resource management.The method comprises the steps that the photoelectric hybrid low earth orbit satellite network is constructed, and topological information, node information and a to-be-scheduled service set of the photoelectric hybrid low earth orbit satellite network are obtained; establishing a mixed integer linear programming model containing node selection constraint, service scheduling sequence constraint and routing constraint by taking the minimum weighted sum of the total service completion energy consumption and the total service completion time as a target; in order to solve the problem of high model complexity, a heuristic algorithm based on simulated annealing is designed, and efficient solution is carried out by iteratively optimizing a scheduling sequence and a routing path of a service; and finally, implementing service scheduling according to the obtained optimal scheduling scheme. According to the method, heterogeneous characteristics of the photoelectric nodes and link resource conflicts are fully considered, dynamic balance of energy consumption and time delay is achieved, network energy efficiency and business service quality are remarkably improved, and the method is suitable for efficient operation of large-scale low-orbit satellite constellations.

The application discloses a kind of virtual-real fusion registration satellite internet digital twin deduction evaluation methods, comprising: S1.Satellite internet global network data is acquired, network data is collected and time synchronization interpolation is carried out, and network equipment data matrix is constructed;S2.based on network equipment data matrix, establish satellite network basic routing topology graph;S3.based on satellite network basic routing topology graph, construct by user satellite network dynamic service demand vector, establish satellite network dynamic routing model;S4.based on network dynamic routing model, establish satellite internet digital twin deduction model;S5.based on internet digital twin deduction model, introduce real data and carry out pseudo-real correction, realize the virtual-real fusion digital twin dynamic deduction of all stages;S6.multiple dimensions index and evaluation function are established, and score is calculated.The application can overcome virtual-real mapping distortion, evaluation dimension single and dynamic adaptability insufficient and other problems, complete accurate deduction evaluation to satellite internet.

The invention discloses a software and hardware cooperation system and method for satellite network routing simulation, and mainly solves the problem that an existing simulation scheme is difficult to consider high fidelity of protocol behaviors and high performance of data forwarding in a high dynamic satellite network. The system comprises a software control plane unit, a hardware data plane unit, a satellite network simulation upper computer and a switch, and the switch is bidirectionally connected with the software control plane unit, the hardware data plane unit, the satellite network simulation upper computer and the switch and serves as a data exchange platform of the system. The satellite network simulation upper computer is used for system configuration management, operation state monitoring and result visualization; the software control plane is used for executing simulation calculation and routing decision of a satellite network routing protocol and generating a standardized forwarding table item; and the hardware data plane unit performs high-speed and deterministic table lookup forwarding according to the standardized forwarding table item, and simulates a satellite resource constraint environment. According to the method, the integrity of protocol simulation details is guaranteed, meanwhile, high-efficiency forwarding performance and non-interruption updating in a high-dynamic environment are achieved, and the method can be used for routing protocol verification, network performance testing and satellite-borne algorithm evaluation of large-scale low-orbit satellite constellations.

A system, method, and receiver control architecture for a Symbolic Resonant Energy Transfer Network (SRETN) configured to distribute electrical power wirelessly across planetary-scale distances under cryptographic, economic, and biological safety governance. The system comprises a distributed mesh of terrestrial resonant transmission towers and orbital relay satellites configured to deliver energy via directed magnetic resonance coupling. A Symbolic Energy Kernel governs authorization and transmission, preventing energization of any transmission vector unless a secure cryptographic energy handshake is completed. The handshake verifies: (i) authenticity and compliance of a requesting receiver device; (ii) real-time solvency of an associated decentralized energy ledger account; and (iii) clearance of the transmission path through active radar and lidar-based biological exclusion scanning. Energy is transmitted as discrete, tokenized packets, each cryptographically metered and acknowledged by the receiver prior to continuation. The system enables a wireless, infrastructure-light energy distribution paradigm in which electrical power is accessed on demand with transaction-level auditability and enforced safety constraints.

The invention provides a satellite-borne router network access test system and a test method thereof. The satellite-borne router network access test system comprises a constellation network node simulation platform, a performance test evaluation platform, an interface protocol conversion device, a constellation service traffic simulator and a network router digital model. Through joint simulation of the virtual nodes and the physical nodes, a simulation test platform can be provided for design and optimization of the satellite-borne router through scene simulation of a complex satellite network environment in a design stage, and the development efficiency is improved; on the other hand, in the product development and system test stage, the full-constellation operation scene can be simulated, the function and the performance of the satellite-borne router can be assessed and verified in the full-constellation scene in the ground environment, the method is particularly suitable for the low-orbit large-scale batch emission large-scale networking scene, the test coverage and the test effectiveness of the product are greatly improved, and the test cost is reduced. Development risks of insufficient verification, delayed verification time and the like before launching are effectively released, and meanwhile, the test verification cost is reduced.

The invention discloses a satellite network SRv6 header compression conversion method, relates to the field of space-ground convergence network communication, and aims to solve the problem of seamless compatible intercommunication between a satellite network based on satellite label routing switching and a ground standard SRv6 network. According to the scheme, end-to-end SRv6 path arrangement between a satellite network and a ground SRv6 network can be realized, the transmission overhead of a standard SRv6 packet in the satellite network is reduced, an SRH head sinks below a network layer, the safety protection of a whole IP layer is realized, the scheme can be continuously compatible with a standard SRv6 technology, and the scheme is particularly suitable for a satellite network system with high safety requirement and limited bandwidth.

This invention relates to a routing method and system for low-Earth orbit satellite constellation networks. This method enhances the congestion awareness of satellite nodes to improve the routing selection and traffic distribution effect. Based on real-time link status information, routes are updated promptly to better respond to changes in satellite network topology and network traffic, resulting in a higher packet delivery success rate. It improves congestion awareness to obtain link load information within a two-hop range and enhances network load balancing by providing a wider range of routing options, enabling satellite nodes to make routing and forwarding decisions with a broader routing perspective.

The invention provides an inter-satellite link dynamic control method and device for a multi-layer satellite constellation and a storage medium. The method comprises the following steps: acquiring an inter-satellite distance threshold matrix and an inter-satellite link adjacency matrix corresponding to the multi-layer satellite constellation; the inter-satellite distance threshold matrix is optimized through a preset optimization algorithm, and a preliminary optimization adjacency matrix meeting inter-satellite link network topology constraints is generated; generating a node feature matrix and inputting the node feature matrix into the graph convolutional neural network to obtain a network feature vector; generating a link exchange strategy candidate set; inputting the network feature vector into an inter-satellite link control model, taking the link exchange strategy candidate set as an action space, and generating a target link exchange strategy; and according to a target link exchange strategy, updating the preliminarily optimized adjacency matrix, performing performance evaluation according to the updated adjacency matrix, and adjusting inter-satellite links among the satellite nodes in the multi-layer satellite constellation. According to the method, the control performance and reliability of inter-satellite link control can be improved, and the actual demand of modern satellite network topology optimization is met.

This application relates to a communication method, apparatus, communication device, storage medium, and computer program product. The method includes: acquiring first information transmitted by a satellite network element, the first information including at least the satellite network element's operating mode; and performing communication processing based on terminal capabilities and the first information. This method effectively enables collaboration between the terminal and the network when both the terminal and the satellite network element support multiple operating modes, thus improving communication reliability.

The invention provides a large-scale low-orbit constellation topology construction method and system based on the reliable reachable distance of an optical transceiver and a storage medium, and the method comprises the steps: 1, building an inter-satellite laser link probability evaluation model based on the capturing probability of an aiming-capturing-tracking system and the motion characteristics of satellites; 2, on the basis of the inter-satellite laser link probability evaluation model, constructing a giant satellite network topology evaluation model with inter-satellite link time average stability, satellite hop count and communication time delay as core optimization targets, and outputting a globally optimized laser link connection scheme; and 3, for a laser link connection scheme, proposing a giant constellation network topology design algorithm based on a capture probability, and constructing a constellation topology by adopting a minimum unit of a space symmetric constellation. The method has the beneficial effects that the constellation topology is constructed by adopting the minimum unit of the space symmetric constellation, so that the topological structure is stabilized, the channel gain is improved, the end-to-end delay is shortened, and the average hop count and the variance of the network are reduced.

The invention discloses a power transmission line tower inclination monitoring system, and relates to the technical field of power distribution network operation and maintenance, the system comprises a sensing layer, a transmission layer and an application layer, the sensing layer comprises a plurality of LoRa terminals; the LoRa terminal is used for collecting tower state data of a power transmission line tower and temperature data around the power transmission line tower, and generating structured data corresponding to the tower state data and the temperature data; the transmission layer is used for transmitting the structured data to the application layer through a dual-communication switching link, and the dual-communication switching link comprises a LoRa wireless sensor network and a Beidou satellite network; and the application layer is used for extracting the characteristic quantity of the structured data according to the dynamic sliding window, and predicting the inclination trend of the power transmission line tower in a future preset time period by using a sparse residual LSTM neural network model based on the characteristic quantity. According to the invention, the measurement precision, the data reliability and the hidden danger early warning capability of the distribution network tower monitoring system in a complex environment can be improved.

The invention discloses a multi-satellite communication network dynamic beam scheduling and power control method, and belongs to the field of resource allocation in satellite communication. The implementation method comprises the following steps: constructing a multi-satellite communication network model, constructing a multi-satellite communication network data queue model based on the network model, and constructing a multi-satellite communication network energy queue model; constructing a queue control model based on a Lyapunov equation; constructing a joint optimization problem of hopping beam scheduling and power control based on a drift and penalty function; reconstructing and approximating the joint optimization problem of the hopping beam scheduling and the power control by using an SCA algorithm; decomposing an approximated joint optimization problem by adopting a Benders decomposition framework, wherein the joint optimization problem is divided into a power control sub-problem and a beam scheduling main problem; solving the power control sub-problem and the beam scheduling main problem to obtain an optimal solution; and iterative optimization is carried out, and dynamic beam scheduling and power control of the multi-satellite communication network are realized according to the optimal solution, so that a multi-satellite network dynamic system reaches long-term stability, and user fairness is realized on flow distribution.

The invention provides a routing method for a space-ground collaborative low-orbit satellite network, which comprises the following steps that: a space-ground collaborative routing system is established, the space-ground collaborative routing system comprises a ground management and control center and satellite nodes, the ground management and control center is deployed with an experience pool and a joint training engine, and each satellite node is deployed with a local inference engine; before a satellite network is started, a ground management and control center obtains empirical data through self-simulation and stores the empirical data in an empirical pool, and the empirical data comprises original local sub-graph data and interactive experience; the ground management and control center carries out sampling to obtain an experience sample and carries out training on the joint training engine; model parameters obtained through training are compressed and uploaded to all satellite nodes, so that the satellite nodes update a local inference engine; enabling a satellite network, and making a local routing decision by a satellite node to obtain empirical data; and issuing the experience data to the ground management and control center at regular intervals so as to store the data into an experience pool, and returning to the step of training the joint training engine. The method provided by the invention solves the problems of high network dynamics and limited on-satellite resources.

Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for ground system techniques to support flexible reconfigurable satellite payload operation. In some implementations, a satellite communication network is managed to operate in a first configuration. The satellite communication network includes a satellite having a payload that enables dynamic reconfiguration of carriers within a beam. A reconfiguration event is detected, and in response, a second configuration is determined for the satellite communication network. The second configuration differs from the first configuration in at least one of a set of carriers used for the beams or an assignment of the carriers to gateways. The satellite network is managed to operate in the second configuration, including at least one of (i) changing to a second set of carriers for the beams of the satellite or (ii) changing to a second assignment of the carriers to the gateways.

The invention discloses a dynamic beam hopping and resource allocation method for NGSO satellite security communication, and belongs to the field of sixth-generation mobile communication security communication and wireless resource allocation. According to the method, significant non-uniformity of distribution of ground flow requirements in a time domain and a space domain is considered, and a satellite-ground security communication network dynamic beam hopping and resource allocation problem model is constructed by considering ground user flow requirements and composition elements and channel characteristics of an NGSO multi-beam satellite network. Through joint optimization of satellite hopping beam scheduling, power resource allocation and auxiliary interference unmanned aerial vehicle deployment strategies, service requirements of different users and ground eavesdropping environments are dynamically adapted, and the safety throughput and queue delay fairness of the system are improved. According to the method, mixed integer linear programming modeling is adopted, and a low-complexity approximation algorithm is combined, so that the method not only has optimality guarantee, but also can be deployed and operated in an actual satellite communication system, and thus unification of secure communication and efficient resource scheduling is realized.

The application provides a user positioning method and device for low-orbit satellite communication and satellite network equipment, relates to the technical field of satellite communication, and the device comprises a receiving unit configured to receive a transmission delay and a Doppler frequency shift reported by a terminal device; a first processing unit configured to control the satellite network equipment to perform the following first operation: calculating a first included angle from the terminal device to a subsatellite point via a satellite according to the transmission delay and an orbital height of the satellite; calculating a second included angle from the subsatellite point to the terminal device in a satellite moving direction via the subsatellite point from a satellite overhead angle according to the first included angle, the Doppler frequency shift, a carrier frequency and a satellite moving speed; and determining position information of the terminal device according to the first included angle and the second included angle. The application can automatically estimate the position information of the terminal device without the terminal device reporting the position information, ensure the service continuity of a communication architecture depending on the terminal device information, and protect the user privacy and safety.

The invention discloses a communication connection method and system of a terminal, network equipment and a storage medium. The method comprises the following steps of: expanding a coverage overlapping area by adjusting a coverage area of a satellite cell; determining a first signal strength evaluation index and a second signal strength evaluation index in the expanded coverage overlapping area; determining whether a mobility management condition of the terminal is satisfied based on the first signal strength evaluation index and the second signal strength evaluation index; and in response to determining that a mobility management condition is satisfied based on the first signal strength evaluation index and the second signal strength evaluation index, triggering the terminal to start a mobility management process. According to the invention, the technical problem of poor user experience caused by untimely reselection or switching or frequent switching due to small signal intensity difference when the terminal moves in the coverage overlapping area of the ground cellular network and the satellite network is solved.

The invention discloses a link congestion control load balancing routing method based on routing domain division. The method belongs to the technical field of low-orbit satellite routing switching application. The problem that a traditional routing algorithm is high in complexity and slow in response time under the condition of a large network scale is solved. A giant constellation is divided into non-overlapping routing domains, global routing is divided into intra-domain local routing calculation and cross-domain routing interaction, on-satellite computing power consumption is reduced, and the method is adaptive to a large-scale satellite network. Meanwhile, a traditional distributed routing algorithm relates to signaling flooding when the state of a satellite link is changed, the signaling overhead is huge in a large-scale satellite network, local response is carried out in the congestion process by means of a sub-domain architecture and inter-satellite link availability prediction, and the signaling overhead of the whole network is reduced, so that the availability of the routing algorithm is improved.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a satellite network entity, signaling that includes a first indicator of a cell-barred operation status indicative of whether a set of UEs is barred from communications and a second indicator of whether a store and forward operation mode is available for communications. A UE that receives such signaling may evaluate a combination of a first value for the first indicator and a second value of the second indicator and determine an availability of the satellite network entity for communication. The combination of values may be used by the UE to determine whether to initiate connections or communications, refrain from communicating, or communicate in accordance with a store and forward mode. Additionally, the satellite network entity may update the indications in response to a condition associated with a feeder link connection changing.

The invention provides a star network and cellular network cooperative communication and predictive seamless switching system and method. The method comprises the steps that S1, a dynamic environment database is loaded, and a star network and cellular network communication module is self-checked; s2, continuously collecting state parameters of a star network communication link and a cellular network communication link; calculating a double-link quality prediction curve in a period of time in the future; s3, if the double-link quality prediction curve obtained through calculation meets a preset switching condition, generating a switching instruction; and S4, receiving a switching instruction, copying the data packet with the highest priority in the switching time window, sending the data packet on the two links at the same time, and switching the data packets with the other priorities to a target link. By converting a switching mechanism into active prediction from passive response, the method can avoid communication interruption caused by predictable events such as satellite shielding and entering a honeycomb blind area in advance, fundamentally guarantees continuity of formation control, and has extremely high communication reliability.

The invention discloses an unmanned aerial vehicle control system and method for Internet of Things communication, and relates to the technical field of unmanned aerial vehicle control, the unmanned aerial vehicle control system comprises a data acquisition module, a decision processing module and the like, a switching instruction is generated through multi-dimensional data fusion, cross-layer collaboration, dynamic spectrum scheduling and three-level link guarantee are realized, and the unmanned aerial vehicle control system and method are applied to unmanned aerial vehicle control. The system has the advantages that through a multi-dimensional data fusion algorithm and a cross-layer cooperation mechanism, link quality, flight state and task type data are acquired in real time by using the data acquisition module, and a precise network switching instruction is generated through the decision processing module; in cooperation with a pre-registered address caching mechanism of the cross-layer cooperation module and a dynamic spectrum allocation strategy of the spectrum scheduling module, the defects of heterogeneous network switching decision lag, cross-layer protocol conflict and dynamic spectrum adaptation deficiency in the prior art are effectively solved, and the scheme realizes intelligent seamless switching of the unmanned aerial vehicle between heterogeneous networks such as a cellular network and a satellite network.

The invention relates to the technical field of satellite communication transmission optimization, and discloses a multi-band collaborative satellite communication remote data transmission system. According to the system, terminal historical data are processed through waveform decomposition, steady-state and transient characteristics are extracted, and a terminal-level dynamic transmission characteristic spectrum is constructed in combination with real-time parameters. And carrying out feature level comparison on the feature spectrum and ground station measured data, fusing time delay, frequency offset and coding distortion differences to generate a difference fusion spectrum, mapping the difference fusion spectrum to a satellite network topology, and identifying an abnormal propagation path and a corresponding physical region. And then activating multi-frequency-band cooperative monitoring, and completing accurate positioning and self-adaptive response of an abnormal region by adjusting satellite node parameters and applying controllable disturbance. According to the scheme, terminal-level behavior characteristics and network topology mapping are utilized, accurate diagnosis from signal tracing to a space path is achieved, and the accuracy of satellite network transmission anomaly management and the autonomous response capability of a system are improved.

The invention discloses a satellite network time delay estimation method based on route-free prior path learning. The method is used for solving the problems that a traditional time delay calculation method must depend on complete route prior and is high in calculation overhead due to the fact that a large-scale satellite network topology is highly dynamic, and routes cannot be obtained or change in real time. The method comprises the implementation steps of network construction and feature extraction; carrying out limited path enumeration on each source-destination node pair; calculating the total time delay of each enumeration path; generating feature vectors of the candidate paths; constructing a lightweight MLP model and calculating a path score; and performing weighted summation on the path time delay according to the path probability to obtain an end-to-end time delay predicted value. According to the method, satellite network time delay estimation can be realized under the condition of unknown routing, high calculation overhead caused by dependence on real routing and construction of a complex graph neural network is avoided, and the method can be used for real-time performance prediction of a large-scale satellite network.

Various approaches for the deployment and coordination of terrestrial cellular (e.g., 5G) network exclusion or mitigation zone, for the dynamic deployment of radio frequency blocking for in-motion aerial devices are described. Approaches are also described for a space-based non-terrestrial network exclusion or mitigation zone, including for maintenance or multi-constellation / multi-orbit coordination. The calculation, distribution, deployment and use of exclusion and inclusion zones are described for coordination with such a terrestrial cellular network or non-terrestrial satellite network.

An adaptive satellite routing orchestration system and an adaptive satellite routing orchestration method are provided. Under the low earth orbit satellite network architecture, by the determination of the connection status of the external submarine cable at the location where the ground network access point and the mobile core network are connected to the mobile network, the traffic of the mobile network is guided to the mobile core network via the submarine cable or the traffic of the mobile network is guided to the mobile core network via the low earth orbit satellite network. A computer-readable medium for executing the adaptive satellite routing orchestration method is further provided.

The invention provides a ground station deployment method and device, equipment and a storage medium. The ground station deployment method comprises the steps of obtaining a ground station needing to be deployed in a preset area and geographical boundary information of the preset area; determining a plurality of candidate positions of the ground station according to the geographical boundary information, and determining function values of the ground station when the ground station is deployed at each candidate position by adopting a hybrid utility evaluation function according to the overall communication quality of the satellite network and communication path diversity parameters of the satellite network when the ground station is deployed at each candidate position, determining a target position of ground station deployment according to each function value; the hybrid utility evaluation function comprises a first function item and a second function item, the first function item is used for representing the overall communication quality of the satellite network, the second function item is used for representing communication path diversity parameters of the satellite network, and the hybrid utility evaluation function is a function for solving the optimal communication quality and / or the optimal communication path diversity parameters. By adopting the technical scheme of the invention, the survivability of the deployed ground station can be improved.

Disclosed herein is beam selection in a system supporting satellite communication. A method of performing beam selection of a user equipment (UE) in a communication system supporting satellite communication may include receiving first information about an elevation angle for supporting the satellite communication and second information about a beam center, determining coverage of a beam based on the first information and the second information, determining a distance between the UE and the beam center based on the second information, and selecting a serving beam for the UE based on the coverage of the beam and the distance.