328 results about "Satellite constellation" patented technology

The invention discloses a micro-nano calibration satellite constellation cooperative control method based on GA and DRL coupling optimization, and relates to the field of satellite networking and constellation optimization design. The method comprises the following steps: constructing a micro-nano satellite constellation task model based on constellation information data; performing global optimization on the constellation parameter vector according to the fitness function in a full constellation parameter space by adopting a genetic algorithm based on the micro-nano satellite constellation task model to obtain an initial constellation configuration set; determining a strategy parameter set according to the initial constellation configuration set by adopting a deep learning method; and carrying out in-orbit deployment according to the strategy parameter set, carrying out state estimation on each satellite, carrying out dynamic updating on the satellites based on the satellite execution control quantity, and completing task allocation and maneuvering negotiation through inter-satellite links by adopting a satellite distributed cooperative strategy so as to realize constellation-level execution control. According to the invention, constellation-level optimal configuration and autonomous cooperative control can be realized, and the in-orbit calibration capability of the micro-nano satellite constellation is improved.

The embodiment of the invention provides a resource allocation method and device of a communication and navigation integrated system, a medium and a product, and relates to the technical field of communication and navigation integration. The method comprises the following steps: constructing a communication and navigation integrated ICaN user system of a low earth orbit satellite constellation service ground; constructing an optimization objective function based on the channel state of the system and the relative position relationship between the satellite and the user; reconstructing a resource allocation problem corresponding to the optimization objective function into a Markov decision process MDP; and optimizing a PPO algorithm by adopting a near-end strategy, solving the MDP, and carrying out dynamic allocation of low-orbit satellite communication and navigation resources. According to the scheme of the invention, through the technical framework of dynamic state perception, model-free reinforcement learning and multi-target collaborative optimization, three bottlenecks of an existing method in a low-orbit satellite ICaN scene are specifically broken through, dynamic adaptability, model independence and performance collaboration of resource allocation are realized, and an efficient solution is provided.

The invention provides a low-earth-orbit satellite global beam position distribution and scheduling system based on deep reinforcement learning, and the system comprises a low-earth-orbit satellite scene modeling beam position distribution module which is used for constructing a low-earth-orbit satellite communication scene and completing the global beam position division. A satellite constellation configuration and orbit parameters are set, global beam positions are divided based on a spherical network, a beam ground projection model and a user system model are established, and a scene basis and a beam position division basis are provided for beam resource scheduling; the deep reinforcement learning beam resource scheduling module is used for realizing intelligent allocation scheduling of beam resources, establishing a decision system based on a Markov decision process by constructing a beam resource allocation model, extracting features through a state space model, performing time sequence modeling, and optimizing a scheduling strategy based on deep reinforcement learning. And dynamically matching the user demand and the beam resource. Therefore, dynamic optimization of low-orbit satellite beam resources is realized, the resource utilization rate is improved, and the communication requirements of users are efficiently met.

The invention provides a data interaction scheduling method and device based on a low earth orbit satellite and electronic equipment, and relates to the field of data processing. In the method, for concurrent scheduling of multiple evidence obtaining tasks, task priorities are calculated based on task criticality, a time window and response confidence, and a multi-stage scheduling queue is constructed; obtaining a low-orbit satellite constellation configuration, and establishing a directed graph structure of satellite nodes and links; searching multiple paths from the ship to the shore-based system and scoring to form a path scheduling table; dividing bandwidth areas according to task priorities and link bandwidth states, and constructing a bandwidth slice configuration table; through a path and bandwidth double-mapping strategy, a data interaction scheduling mechanism of evidence obtaining data uploading and control data issuing is realized. By implementing the technical scheme provided by the invention, the execution timeliness of the whole evidence obtaining task can be improved.

The invention discloses a multi-beam spatial frequency conflict resolution method which is suitable for a large-scale low-orbit satellite constellation system. According to the method, high-orbit satellites are used as centralized control nodes, orbit states and service requirements of low-orbit satellites in a system are received, and allowable transmission practice windows and required continuous transmission time slot numbers of the low-orbit satellites are analyzed; on the basis, calculating a space intersection area and a potential interference time period between the low-orbit tracks; and aiming at the differentiated transmission requirements, according to a preset orbit priority sequence, sequentially allocating transmission time slot resources to each low-orbit satellite transmission service. According to the invention, the overall perception of a high-orbit satellite on the orbit state and service requirements of a low-orbit satellite, the search and judgment of orbit cross interference beams and time periods, and the comprehensive decision of service transmission time sequence optimization distribution are carried out; the method achieves the effective avoidance of potential same-frequency interference of transmission services of satellites with different orbits in an intersection region in a complex space-time dynamic environment, and remarkably improves the transmission success rate and the overall resource utilization rate of a large-scale low-orbit constellation system.

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 invention discloses a multi-constellation cooperative edge computing unloading prediction method and device. The method comprises the following steps: determining the task calculation amount of each satellite in a satellite constellation for the same area; constructing a first graph structure by taking each satellite as a first node and taking the first task unloading relationship of each satellite as a first edge; iteratively updating the first graph structure by using a graph neural network model according to a preset calculation rule to generate a second graph structure; constructing a first target feature vector and a second target feature vector corresponding to the virtual task unloading relationship in the second graph structure, and determining a second task unloading relationship among the satellite constellations in the second graph structure according to the first target feature vector and the second target feature vector; and determining a third target feature vector corresponding to the association node of the second task unloading relationship in the second graph structure, inputting the third target feature vector into a pre-trained first prediction model, and predicting the task unloading amount among the satellite constellations.

Described herein is a method for wireless transmission of energy in space, wherein a constellation of transmitting satellites orbiting around a celestial body, such as the planet (P) Earth or the Moon (L), are equipped with a laser apparatus for sending a beam of coherent electromagnetic waves to an orbiting satellite or another receiving target, such as a mobile vehicle or a fixed base on said generic celestial body, in order to transmit energy thereto. The total power transmitted is divided among the orbiting satellites in the constellation, resulting in less contraindications than in the case of a single transmitting system with equivalent total power. The advantage of such division among a constellation of satellites mainly consists of shorter periods of solar eclipse, since sunlight is necessary for the operation of the transmission system. The receiving target or satellite converts the beam of electromagnetic waves into electric energy.

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.

The invention discloses a computing power scheduling method for multi-satellite collaborative application. The computing power scheduling method comprises the steps that 1, a ground station generates an undirected connection graph according to a satellite constellation topological structure and a resource state; step 2, the ground station receives a user instruction and carries out task computing power demand estimation; step 3, the ground station adopts a sliding window mode on the undirected connection graph to determine an execution area for executing the task; 4, calculating a central node of the execution area, and taking the central node as a source satellite for executing an information acquisition task; 5, executing an information acquisition task by the source satellite; step 6, completing task data distribution from the source satellite to other satellite nodes in the area by adopting a double-factor sorting scheduling strategy; 7, the satellite node returns a result to the source satellite after completing task processing; and step 8, the source satellite collects the result and sends the result to the ground station. The invention provides a strategy of multi-satellite cooperative processing and resource dynamic scheduling under the condition that the single-satellite capability is limited, and the processing time delay of on-satellite data is reduced.

A communications system may include a satellite constellation and a terrestrial network. A first user equipment (UE) device may provision sender keys, handles, and / or status information with a core network while connected to the terrestrial network. The core network may accommodate server fan out to a set of other UE devices associated with a particular user identifier. When the first UE device disconnects from the terrestrial network, the first UE device and the set of other UE devices may convey end-to-end encrypted messages through the constellation and the core network. The first UE device may address the set of other UE devices using a short handle associated with the user identifier and / or using a handle index. The first UE device may transmit a control message via the constellation that instructs the core network to release provisioned status information to the set of other UE devices.

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.

A communications system may include a satellite constellation and a terrestrial network that convey text messages between first and second user equipment (UE) devices. The terrestrial network may include a core network, an inter-working function (IWF) server, and carrier networks. The IWF server may distribute keys and the first UE device may transmit provisioning data to the core network while the first UE device is on-grid. When the first UE device goes off-grid, the first UE device may transmit an escrow key to the core network for use in decrypting a device public key from the provisioning data. The core network may transmit the device public key and other information to the IWF for use in routing messages via the NTN. The core network may use the handles to enforce an allow list that filters traffic to the first UE device over the NTN.

The invention provides an SRv6-based flow transmission method for a low earth orbit satellite constellation. The method comprises the following steps: determining a satellite constellation head node and a satellite constellation tail node according to a source gateway station and a target gateway station; the method comprises the following steps: configuring an SID of an End-SPA type at a source gateway station; a satellite of the current next hop is used as a head node, an SRv6 Policy path conforming to a link SLA is calculated according to a satellite topo at the current moment, and a BSID associated with the End-SPA is configured to be drained into the SRv6 Policy path; and forwarding the traffic. According to the traffic transmission method, cross-domain data transmission under large-scale constellation networking can be realized, and the calculation pressure is reduced.

The invention discloses a radar imaging detection satellite constellation design method, which comprises the following steps of: decomposing a constellation into a plurality of orbit surfaces, uniformly describing each orbit surface through four parameters, constructing an asymmetric constellation structure, and establishing a multi-target optimization model for solving by taking the total cost of the constellation, the maximum revisit time and the detection performance as targets. Non-dominated quantizer sorting is introduced in the sorting process, and satellite constellation design is completed. According to the method, single-satellite-based optimization of the salted fish is converted into orbital plane-based optimization, the optimization variable dimension is remarkably reduced, the method is particularly suitable for large-scale constellation design comprising hundreds of satellites, meanwhile, the Pareto frontier is obtained through non-dominated sorting, various constellation configuration schemes emphasizing different performances are provided, and the method is suitable for large-scale constellation design. Compared with an existing constellation design method, the problems that the to-be-optimized parameters are increased along with the number of satellites, and efficiency is low are solved, the scheme output by the algorithm is more reasonable through the improved sorting mode, and the method can be used for constellation design.

The present invention relates to the technical field of communications, and provides a 6G space-air-ground-sea integrated fusion architecture based on software-defined cloud-edge collaboration, comprising: three tiers of cloud nodes from low to high: an edge cloud, a space-based cloud, and a core cloud; the edge cloud comprises 6G-enabled ships based on software-defined networking and mobile edge computing technologies; the space-based cloud comprises low earth orbit satellites based on software-defined satellite technology and low earth orbit satellite constellations connected by means of an inter-satellite link; the core cloud comprises a space-based 6G core network; the edge cloud, the space-based cloud, and the core cloud follow a task offloading mechanism and an information feedback mechanism; the task offloading mechanism is configured to select, on the basis of characteristics of a task, a cloud node of a target tier for task processing; and the information feedback mechanism is configured such that the cloud node of the upper tier sends feedback information to a cloud node of the lower tier, so as to optimize task processing of the lower tier. The present invention achieves fast and flexible networking for a 6G space-air-ground-sea integrated fusion network, thereby realizing efficient utilization and collaborative management and control of resources.

A constellation of satellites provides communication services to user terminals (UTs). Some UTs may be fixed while others are mobile. Each satellite provides communication services to discrete geographic areas or “spots” on and above the Earth. The mobile UT may operate in various modes. In a normal mode, communication resources within a single spot are allocated to a mobile UT. An obfuscated mode allocates the mobile UT communication resources in many spots, even though the mobile UT is only physically present in one. A whisper mode minimizes transmission from the mobile UT. With the exact location of the mobile UT unknown to the satellites, the mobile UT may send a handover request that is used to schedule a handover to other satellite(s), providing ongoing communication service while the mobile UT moves. In some implementations the handover request is determined in advance. A quiet mode facilitates the mobile UT receiving only.

In some implementations, a method of facilitating pointing of a mobile device at a satellite of a satellite constellation for satellite-based data communication, may comprise obtaining, at a first time point, historical orbital data indicative of orbital movement of a plurality of satellites of a satellite constellation over a period of time. The method may also comprise assigning a reference orbital dataset of the plurality orbital datasets determined at a reference time point to corresponding control boxes of a reference grid covering the satellite constellation, wherein each control box of the reference grid corresponds to a satellite of the satellite constellation. The method may also comprise mapping the plurality orbital datasets to the reference grid for an orbital model based on the assignment of the reference orbital dataset.

A satellite constellation forming system (100) forms a satellite constellation (20). The satellite constellation (20) is composed of a satellite group (300). In the satellite constellation (20), the satellite group (300) provides a service cooperatively. The satellite constellation (20) has a plurality of orbital planes in which a plurality of satellites (30) fly at the same orbital altitude in each orbital plane (21). A satellite constellation forming unit (110) forms the satellite constellation (20) in which orbital altitudes of the plurality of orbital planes (21) are mutually different.

The invention discloses a satellite constellation autonomous deployment method and system, belongs to the technical field of aerospace orbit control, and solves the problems of long deployment period, high personnel investment, slow collision avoidance response, increased orbit safety risk and the like caused by a traditional satellite deployment method. The method comprises the following steps: constructing a constellation network according to initial orbit parameters of a satellite and orbit injection time and orbit parameters of different stages; outputting an optimal deployment strategy of each stage of the constellation through a genetic algorithm; the right ascension of the ascending node and the phase are adjusted to a target position together while the height is deployed in place through a coupling equation, and ignition constraints are constructed; generating an orbital transfer plan according to the thrust and a satellite initial orbit needing to be deployed; an orbital transfer instruction is automatically generated according to the orbital transfer plan; according to on-orbit telemetering, the orbital transfer progress condition is judged, and strategy closed-loop adjustment is carried out; cooperative deployment of multi-orbit-plane satellites is achieved, and fuel and time cost are saved. The method is particularly suitable for multi-orbit-plane collaborative deployment and autonomous management of large-scale satellite constellations.

A communications system may include a satellite constellation and a terrestrial network that convey text messages between first and second user equipment (UE) devices. The terrestrial network may include a core network, an inter-working function (IWF) server, and carrier networks. The IWF server may distribute keys and the first UE device may transmit provisioning data to the core network while the first UE device is on-grid. When the first UE device goes off-grid, the first UE device may transmit an escrow key to the core network for use in decrypting a device public key from the provisioning data. The core network may transmit the device public key and other information to the IWF for use in routing messages via the NTN. The core network may use the handles to enforce an allow list that filters traffic to the first UE device over the NTN.

In some embodiments, a communications system can include a plurality of low earth orbit (LEO) satellites deployed at different altitudes and configured to communicate with one or more terrestrial devices and with one another. The communications system may further include a plurality of geosynchronous (GEO) satellites deployed above the plurality of LEO satellites. The plurality of LEO satellites may cooperate with one another and with the plurality of GEO satellites to provide a global communication network having redundant point-to-point communication.

The invention relates to the technical field of constellation satellite maintenance regulation and control, and discloses an intelligent regulation and control system and method for low-orbit Walker constellation configuration maintenance, and the method comprises the steps: obtaining the change trend of an in-plane phase angle and an inter-plane distance of an orbit of a satellite in real time through a high-precision orbit prediction model; inputting the in-plane phase angle and the inter-plane spacing into a pre-trained decision model, judging whether the parameters exceed a preset configuration maintenance threshold, and positioning an unstable satellite; if the parameters exceed the limit, the model outputs the optimal orbit maneuvering parameters of the satellite based on dual-target constraints of minimum fuel consumption and shortest service interruption; a phase maintenance demand and an on-satellite observation task are fused, an optimal control scheme is generated, and constellation configuration is maintained in combination with task planning and implementation; continuously monitoring the satellite constellation configuration state, and maintaining the stable operation of the constellation. According to the invention, automatic maintenance of Walker constellation configuration is realized, and the control precision and efficiency are improved.

The invention discloses a rapid topology sampling method and device for a large-scale constellation in an unreliable space environment, and mainly solves the problem of low sampling efficiency in the prior art. According to the implementation scheme, satellite constellation configuration parameters are obtained; different orbit link establishment modes of all satellite nodes under different distortion factors are determined; determining distribution modes of all satellite nodes on a virtual plane under different constellation configurations; judging whether the satellites have synchronism in the critical latitude region crossing event or not, and judging whether topological dynamics can be caused when the first orbit satellite and the tail orbit satellite cross the critical latitude region or not; automatically calculating the number and length of topology snapshots of constellation distortion topology in an orbit period according to a different orbit link establishment mode, a distribution mode of satellite nodes on a virtual plane and a topology dynamic result, and determining a distribution rule of inter-satellite topology snapshots; and converting a calculation result into an inter-satellite topology sampling time point and a corresponding topology snapshot length according to the distribution rule. The method is high in sampling efficiency and low in use threshold, and can be used for design and optimization of a large-scale distorted topological constellation network protocol.

The invention discloses a data transmission system and method based on optical remote sensing data. The system comprises a user terminal, a satellite constellation and a ground control center, wherein the ground control center is configured with a terminal position and ephemeris management module, an environment modeling module, a track and sight distance prediction module and a resource scheduling optimization module. A high-precision three-dimensional environment model around a user is constructed by introducing optical remote sensing, and in combination with satellite trajectory calculation and ray tracing / machine learning prediction, link shielding is judged and avoided in advance. Based on a prediction result, the system can perform high-speed burst transmission in a visible window or actively complete satellite switching before shielding, so that the continuity and reliability of satellite direct connection communication in complex environments such as cities and canyons are remarkably improved. According to the invention, the limitation of passive switching in the prior art is broken through, the resource utilization rate and the user experience can be effectively improved, and technical support is provided for constructing an ubiquitous space-ground integrated communication network.

A communications system may include a satellite constellation and a terrestrial network. A first user equipment (UE) device may provision sender keys, handles, and / or status information with a core network while connected to the terrestrial network. The core network may accommodate server fan out to a set of other UE devices associated with a particular user identifier. When the first UE device disconnects from the terrestrial network, the first UE device and the set of other UE devices may convey end-to-end encrypted messages through the constellation and the core network. The first UE device may address the set of other UE devices using a short handle associated with the user identifier and / or using a handle index. The first UE device may transmit a control message via the constellation that instructs the core network to release provisioned status information to the set of other UE devices.

A communications system may include a satellite constellation and a terrestrial network. A first user equipment (UE) device may provision sender keys, handles, and / or status information with a core network while connected to the terrestrial network. The core network may accommodate server fan out to a set of other UE devices associated with a particular user identifier. When the first UE device disconnects from the terrestrial network, the first UE device and the set of other UE devices may convey end-to-end encrypted messages through the constellation and the core network. The first UE device may address the set of other UE devices using a short handle associated with the user identifier and / or using a handle index. The first UE device may transmit a control message via the constellation that instructs the core network to release provisioned status information to the set of other UE devices.

A method for network data communication includes, at a terrestrial computing device, detecting one or more beacon signals from a corresponding one or more orbital communication satellites of a constellation of orbital communication satellites. A transmission probability threshold is adjusted based at least in part on a detected quantity of the one or more orbital communication satellites. Data is transmitted from the terrestrial computing device to the constellation of orbital communication satellites contingent on the transmission probability threshold being satisfied.

The present invention determines an appropriate communication path via a plurality of satellites by using a satellite constellation. Provided is an information processing device comprising: a reception unit that receives information indicating a satellite with which a first terminal can communicate, and information indicating a satellite with which a second terminal can communicate; a determination unit that determines a communication path between the first terminal and the second terminal on the basis of the communication quality of each of a plurality of communication paths through which the first terminal and the second terminal can communicate via a plurality of satellites; and a transmission unit that transmits information based on the communication path determined by the determination unit.