734 results about "Satellite constellation" patented technology

The invention discloses a sky-ground integrated automatic driving intelligent decision-making system and method driven by a large language model, and the system comprises a satellite layer, a vehicle end layer and a cloud end layer, and achieves the precise, intelligent and efficient automatic driving decision-making through efficient data interaction and cooperative processing. The satellite layer comprises a low-orbit satellite constellation, transmits high-precision positioning information to a vehicle in real time and provides a space-time reference; the vehicle end layer is an executor, collects environment data in real time through a sensor, generates a preliminary driving decision by using high-precision positioning data and an end-to-end rapid decision model built in the vehicle end layer, and uploads driving data, environment sensing data and decision requirements to a cloud end; the cloud end carries out remote monitoring and management on the system, evaluates the vehicle state and carries out early warning, when the vehicle runs safely, the vehicle end is adopted for decision making, when potential risks or abnormal conditions exist, the large language model is adopted for decision making, optimization instructions are pushed to the vehicle end, model parameters or emergency disposal schemes are updated, and the vehicle end is assisted to correct the decision.

The invention discloses a satellite collision avoidance system and method based on a satellite edge computing network. The system comprises a space monitoring network, a space traffic management subsystem and the satellite edge computing network. The space monitoring network is used for observing the running state of a space target to obtain multi-source observation data; the space traffic management subsystem is used for integrating the multi-source observation data to generate space target orbit data; the satellite edge computing network further comprises the steps that a GEO satellite broadcasts space target orbit data to an LEO satellite constellation and forwards collision risk screening information to a ground cloud computing center; the LEO satellite constellation calculates collision risk screening information according to the space target orbit data and formulates a collision avoidance control strategy; the LEO / GEO earth station is used for data transceiving and protocol conversion among the GEO satellite, the LEO satellite constellation and the cloud computing center; and the ground cloud computing center stores constellation orbit data through protocol conversion and satellite communication. According to the invention, the real-time performance of satellite collision avoidance is improved.

The embodiment of the invention provides a routing method and device based on satellite processing, and the method employs a time slice division mechanism, and constructs a dynamic network topology structure according to a satellite constellation operation period and a link building rule. And the gateway station uploads the corresponding relation data of the time slice and the network topology to the satellite node for storage in advance. And after the satellite node receives the data, based on the network topology corresponding to the current time slice, the shortest path algorithm is adopted to realize autonomous routing calculation, and a next hop forwarding node is determined. And ensuring that the data is transmitted to the target node along the optimal path through a dynamic routing recalculation mechanism of the relay node. According to the method, the defects of the traditional technology in the aspects of routing real-time performance, topology management, on-satellite processing and the like are effectively overcome, and the performance of a satellite communication network is remarkably improved.

A low earth orbit satellite (LEO)-based communication system and method. The system comprises a low-orbit satellite constellation, a ground station, a user terminal and a network management and control center. The network management and control center comprises a track and link prediction module, a link quality prediction and evaluation module, a predictive resource pre-allocation and dynamic adjustment module and a space-ground cooperative control module. According to the communication system, active resource optimization and dynamic adjustment before actual switching are realized through track and link prediction, link quality prediction, predictive resource pre-allocation and dynamic adjustment and air-ground cooperative control. According to the method, the switching time delay can be greatly reduced, the packet loss rate is remarkably reduced, and the system throughput and the access success rate are also remarkably improved. Through predictive management, the performance, reliability and user experience of LEO communication are comprehensively improved.

The invention provides a satellite networking communication method, device and equipment, and the method comprises the steps: carrying out the space-time window decomposition processing of a satellite constellation orbit parameter based on orbit phase synchronization, and decomposing a long-period scheduling problem into a plurality of short-period sub-problems; performing state transition conflict detection processing on the double-feed antenna system according to the space-time window decomposition result, and determining the working state of the feed antenna; parallel neighborhood search processing based on reinforcement learning is carried out according to the feed antenna resource configuration scheme, and a communication link scheduling strategy is generated through multi-thread collaborative optimization; and performing dynamic fusion processing based on state prediction according to the parallel optimization scheduling scheme, and adjusting a satellite-ground station communication link establishment time sequence through learning type template matching. Through space-time decomposition, intelligent conflict detection, reinforcement learning optimization and dynamic fusion, the problems of complexity and real-time performance of large-scale satellite networking communication scheduling are solved, and the scheduling efficiency and the communication quality are remarkably improved.

The invention provides a multi-satellite cooperative distributed routing method for multi-agent reinforcement learning, and the method comprises the steps: building a satellite network static topology model through a time slicing technology, and building a target function for minimizing the end-to-end time delay of a data packet; constructing a satellite agent network based on the satellite network static topology model, and obtaining satellite interaction experience data; wherein the satellite agent network comprises a multi-satellite cooperative hybrid network and a satellite decision network corresponding to each agent; training a satellite agent network according to the satellite interaction experience data to obtain a trained satellite agent network; and respectively deploying the satellite decision networks in the trained satellite agent network to corresponding agents, so that the agents perform routing decision based on the deployed satellite decision networks. Through cooperative work of the satellite decision network and the multi-satellite cooperative hybrid network, efficient distributed routing decision of a low-orbit satellite constellation can be realized, time delay is reduced, and load is balanced.

The invention discloses a networked measurement and control data transmission task scheduling method for a giant low-orbit satellite constellation, and solves the problem of low completion rate of measurement and control data transmission tasks caused by incapability of global station distribution in the prior art. Obtaining a resource attribute, a ground station state and a low earth orbit satellite state by using the task layer, the resource layer, the equipment state and the constellation state, performing data conversion to obtain input data, inputting the input data into the trained multi-agent network to obtain an action corresponding to the current time slot, and determining an entry low earth orbit satellite and an associated ground station according to the action; obtaining a routing path between the entry low earth orbit satellite and the task low earth orbit satellite according to the inter-satellite shortest path routing table, and determining a scheduling sequence according to the routing path and the associated ground station; the mutual influence between global tasks and resources is considered, the effectiveness of decision making during execution is reduced, and meanwhile, the scheduling efficiency of measurement and control data transmission tasks in a giant low-orbit satellite constellation scene is improved.

The invention discloses a high-performance satellite platform based on a real-time operating system and a wireless bus and a working method of the high-performance satellite platform, and belongs to satellite communication technologies, future deep space exploration and low-orbit satellite constellations. On the basis of an original structure of a satellite platform, a real-time operating system is effectively combined with a wireless bus system, and the real-time operating system comprises a kernel module, a communication module, an equipment driving module, a file system module, an application interface module, a safety module and a fault management module. The wireless bus system comprises a physical layer, a data link layer, a network layer, a transmission layer and an application layer. According to the invention, efficient and reliable communication and task execution capabilities are provided for a satellite platform, the requirements of real-time performance and reliability of a satellite in a complex environment are effectively met through modular design and tight work of the system, and meanwhile, complex lines and interfaces brought by a wired system are avoided.

Systems, methods and devices to manage user orders for geospatial information and to perform an optimization scheme for satellite resources within a satellite constellation are provided. Embodiments include computer-implemented methods comprising receiving, from a user, an order for geospatial information, wherein the order comprises at least one attribute related to the ordered geospatial information; and querying a database to identify information about other orders received from the same or different users, with the same or different attributes; and at least one of: setting a price for the geospatial information ordered by the user based at least in part on the at least one attribute and the identified other orders, or performing an optimization scheme for determining whether the ordered geospatial information can be provided to the user and the other user orders can be satisfied, and targeting at least one sensor on board a manned or unmanned aerial vehicle configured to collect the geospatial information based on the determination.

A satellite constellation system includes a plurality of satellites, wherein each satellite is configured to orbit in one of a plurality of orbital planes of the satellite constellation system at an altitude range corresponding to low earth orbit (LEO), wherein each of the plurality of orbital planes includes a corresponding one of a plurality of satellite subsets of a plurality of satellites, wherein a first orbital plane of the plurality of orbital planes corresponds to a first coverage area facilitated by a plurality of navigation signals transmitted by ones of the plurality of satellites in the first orbital plane, wherein the plurality of navigation signals transmitted by the ones of the plurality of satellites in the first orbital plane each have a first primary pseudo-random noise (PRN) code; and wherein a second orbital plane of the plurality of orbital planes corresponds to a second coverage area facilitated by a plurality of navigation signals transmitted by ones of the plurality of satellites in the second orbital plane, wherein the plurality of navigation signals transmitted by the ones of the plurality of satellites in the second orbital plane each have a second primary PRN code.

The invention relates to an inter-satellite link communication simulation system and method based on a satellite constellation. The system comprises a satellite orbit simulation module, a satellite attitude simulation module, an inter-satellite communication link simulation module, a visualization and interaction technology module and a data interaction and system test module. The satellite orbit simulation module is used for calculating a movement track of a satellite in an earth gravitational field; the satellite attitude simulation module is used for accurately simulating a satellite attitude; the inter-satellite communication link simulation module is used for evaluating inter-satellite communication quality; the visualization and interaction technology module is used for presenting real-time states of satellite orbits, attitudes and inter-satellite links; and the data interaction and system test module is used for smoothly exchanging data, and comprehensively testing and checking the correctness and performance of satellite orbits, attitudes and communication functions. The method has the beneficial effects that the real-time states of the satellite orbit, the attitude and the inter-satellite link are efficiently presented, so that a user can easily monitor and control the simulation process.

The invention discloses a low earth orbit satellite constellation dynamic hopping beam variation optimization method based on deep reinforcement learning, solves the problem of dynamic hopping beam optimization in LEO satellite constellations, and realizes intelligent decision making of satellites only depending on local information through a distributed multi-agent deep reinforcement learning method. The system throughput is improved; and the communication delay is reduced.

The embodiment of the invention provides a satellite beam scheduling method and device based on reinforcement learning, equipment and a storage medium. The method comprises the following steps: constructing a state space comprising respective satellite identifiers of a plurality of satellites in a navigation satellite constellation, pitch angles of the satellites relative to a target area, direction angles of the satellites relative to the target area and relative distances between the satellites and the target area, and constructing an action space comprising a satellite identifier sequence of satellites to be scheduled, the method comprises the steps of designing a reward function based on a reward index comprising a coverage multiple reward and a PDOP reward, training a neural network of satellite beam scheduling according to a state space, an action space and the reward function based on a TD3 algorithm to obtain a trained strategy network, inputting a real-time state vector of a target area into the trained strategy network to obtain a real-time action, and outputting the real-time action to the target area. And controlling all satellite beams corresponding to the real-time action to point to the target area. The method can improve the service quality of the satellite and improve the accuracy of reentry trajectory prediction.

The invention provides an inter-satellite link communication simulation method and system based on a satellite constellation and a program product, and the method comprises the following steps: calculating the position and speed data of at least two satellites in a preset time sequence based on a satellite orbit parameter and acting force model; calculating attitude data of the at least two satellites in a preset time sequence based on the satellite attitude parameters and an attitude dynamics model; on the basis of the position, speed and attitude data and preset link parameters, inter-satellite link key parameters between the at least two satellites are calculated, and the key parameters comprise link delay, bandwidth, signal strength and bit error rate; and carrying out three-dimensional visual display on the position, speed, attitude data and inter-satellite link key parameters. The problems that in the prior art, a simulation system cannot comprehensively reflect the actual communication condition, and it is difficult to accurately simulate the electromagnetic wave propagation particularity in the space environment are solved, the performance of the communication link can be predicted more accurately, and the reliability of inter-satellite communication link simulation is enhanced.

Various approaches for the deployment and use of communication exclusion zones, defined for use with a satellite non-terrestrial network (including within a low-earth orbit satellite constellation), are discussed. In an example, defining and implementing a non-terrestrial communication exclusion zone includes: calculating based on a future orbital position of a low-earth orbit satellite vehicle, an exclusion condition for communications from the satellite vehicle; identifying, based on the exclusion condition and the future orbital position, a timing for implementing the exclusion condition for the communications from the satellite vehicle; and generating exclusion zone data for use by the satellite vehicle, the exclusion zone data indicating the timing for implementing the exclusion condition for the communications from the satellite vehicle.

The embodiment of the invention provides a satellite constellation system and a communication control method, the system comprises a plurality of load satellites which are in inter-satellite communication connection, and each load satellite comprises a comprehensive electronic subsystem, a communication navigation subsystem, an attitude and orbit control subsystem and a power supply and distribution subsystem. During an on-orbit task, a spaceborne computer of the comprehensive electronic subsystem can obtain information of a current task stage, calculates communication target parameters according to a communication mode corresponding to the current task stage, and generates an attitude adjustment instruction based on communication attitude parameters corresponding to the communication target parameters; and controlling the attitude and orbit control subsystem to adjust the inter-satellite communication module and / or the ground communication module to a communication attitude associated with the azimuth information. According to the system, data processing and communication processes can be dispersed to a plurality of load satellites through inter-satellite communication, and the communication attitude requirement of the inter-satellite communication process is automatically adapted, so that the problem of low timeliness of the satellite system data processing and communication processes is solved.

The invention relates to the technical field of low-orbit satellite measurement and control, and provides a low-orbit satellite measurement and control method, a satellite, electronic equipment and a medium, and the method comprises the steps: obtaining the space measurement and control signals of a reference satellite and a to-be-positioned satellite, and the orbit position data of the reference satellite; determining orbit information of the satellite to be positioned based on the space measurement and control signal and the orbit position data; calculating orbit information of other satellites to be positioned through a preset orbit positioning method and the orbit information of the positioned satellites through AI to obtain networking information of the whole satellite constellation; telemetry data sent and received through networking information among satellites are monitored in real time through AI sensing; and performing satellite measurement and control based on telemetry data. Therefore, measurement and control tasks are completed on the satellite, construction of ground measurement and control satellite stations can be reduced, manual uninterrupted measurement and control management can be reduced, economic cost can be reduced, pollution of space electromagnetic interference environment and harm to human bodies can be reduced, and intelligentization, modularization, fast response and low cost of a satellite measurement and control system can be realized.

The invention relates to a conduction fusion enhancement method suitable for an earth-moon space high-orbit spacecraft, and the method comprises the steps: transmitting a communication and navigation fusion enhancement signal through a designed and planned HEO satellite constellation, and receiving and processing a Beidou navigation signal and an HEO enhancement signal in a compatible manner on the basis of not changing the hardware structure of an earth-moon space navigation receiver. The number of available navigational stars is increased through an observed quantity combination mode, the geometric distribution of constellations is improved, and the navigation solution accuracy and the positioning precision of earth-moon space are improved. And meanwhile, a communication function of forwarding information such as navigation ephemeris, receiver position and user customized data of uplink injection on the ground through an HEO constellation is supported, auxiliary information is provided for the earth-moon space navigation receiver, the receiving processing performance is improved, and communication and navigation fusion processing is realized. According to the method, the performance and the service capability of the high-orbit satellite navigation receiver can be improved, and the method has certain reference significance for spacecraft conduction fusion and integrated design.

The invention relates to the technical field of spacecraft autonomous time keeping, and discloses a satellite autonomous clock error estimation method, a reference establishment method, a device and a product. The satellite autonomous clock error estimation method comprises the following steps: constructing a laser communication link between satellites based on a laser communication list; any satellite carrying an atomic clock with the precision not lower than E-16 magnitude is determined as a reference satellite; calculating a target clock difference between a target satellite and the reference satellite based on a first clock difference between adjacent satellites in the laser communication link; the target satellite is any satellite except the reference satellite in the navigation satellite constellation system; and the adjacent satellites directly communicate with each other through a laser communication link. By adopting the method, a navigation constellation system running in a high orbit can realize space-based autonomous high-precision clock error estimation and clock synchronization in a global range.

The invention relates to the technical field of satellite communication, and particularly discloses a joint task unloading and power distribution method and system for a satellite edge network, and the method comprises the steps: building a satellite task unloading model, and determining a master satellite node and a slave satellite node in a satellite constellation; the master satellite node sends a data packet and judges whether a link to the slave satellite node exists or not; wherein if the link to the slave satellite exists, the slave satellite is added to the slave satellite list; if the communication link does not exist, continuing to search the next slave satellite, and judging whether the communication link exists or not; according to the distance between each slave satellite and the master satellite and the computing power, using a penalty dual decomposition algorithm to allocate computing tasks and computing resources; and the master satellite transmits data to the slave satellites according to a task allocation strategy calculated by a penalty dual decomposition algorithm until the end.

The invention provides a satellite constellation network topology state rapid sensing method. A multi-dimensional physical layer monitoring module, a dynamic adaptive BFD detection mechanism, an OSPF routing protocol and a shared data exchange area of a BFD driver and an OSPF process are deployed on each satellite node. According to the method, the connectivity of inter-satellite links is monitored in real time by using a physical layer signal state monitoring technology and the rapid link state detection capability of a BFD protocol, and related nodes are immediately notified through a control message when a fault is detected; meanwhile, the detection result of the BFD is linked with an OSPF routing protocol, and instant routing recalculation is triggered, so that the routing convergence time is shortened. A cross-layer closed-loop linkage system is constructed, a physical layer senses data to dynamically regulate and control protocol layer detection parameters, and hardware acceleration is combined to realize fault detection full-process optimization, so that the fault detection and recovery speed is accelerated, the resource utilization efficiency and the overall transmission efficiency of an inter-satellite network are improved, and the fault detection and recovery efficiency is improved. And high reliability and stability of the network are ensured.

Proposed is a topology generation device for generating topology for a low earth orbit satellite constellation system including a plurality of low earth orbit satellites to be operated in a plurality of orbits. The topology generation device may include a memory storing one or more instructions and a processor executing the one or more instructions. The processor may collect orbit information for the plurality of orbits from a ground station, collect status information including status of links between the plurality of low earth orbit satellites, and generate location information for a first low earth orbit satellite by predicting a location of the first low earth orbit satellite based on the orbit information. The processor may also generate a network topology for the low earth orbit satellite constellation system based on the location information for the first low earth orbit satellite and the status information.

The invention relates to a satellite-ground fusion network multi-target space-time switching decision-making method. The method comprises the following steps: S1, establishing system models based on a real environment and a Starlink satellite constellation, wherein the system models comprise a terminal mobile model, a network model and a communication model; s2, defining performance indexes of service quality and experience quality, and constructing a target function; s3, modeling a connection switching decision process: modeling the connection switching decision process as a Markov decision process; s4, proposing a space-time decision method for connection switching based on the double-mask double-depth Q network: obtaining an optimal switching strategy by utilizing continuous interaction between an intelligent agent and an environment; in the exploration stage and the utilization stage, action masks are used respectively to improve the learning efficiency of the intelligent agent in the high-dimensional action space. According to the method provided by the invention, the total switching frequency in the transmission process is reduced, the average connection duration is prolonged, the average throughput is improved, the delay is reduced, and meanwhile, dense switching in the transmission process is avoided.

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.

Methods, systems, and techniques for assigning an image acquisition task to a constellation of satellites may be performed by first receiving a request via an inbound API call to assign the image acquisition task to the constellation of satellites. The request may include a time at or during which at least one image is to be acquired by the constellation. Based on the request, at least one task performance rule specifying how the task is to be performed is retrieved. At least one internal API call is generated to task the constellation of satellites to perform the task. The at least one API call specifies the time at or during which the task is to be performed and the at least one task performance rule. The task is then assigned to be performed by the constellation of satellites by making the at least one internal API call.

The invention discloses a hybrid in-band telemetering system and method for a giant constellation satellite network, and the method comprises the steps: firstly determining a detection node through a central controller, and building a communication channel; secondly, the central controller issues a telemetering task, the detection node constructs a detection packet active period broadcast, the forwarding node modifies and forwards the detection packet, and finally the detection node uploads the detection packet containing telemetering data to the central controller; in the process, the forwarding node performs periodic self-inspection, and processes telemetering abnormal conditions through a self-inspection packet and election of a temporary detection node; and finally, the central controller analyzes the detection packet to obtain the state information of each link, and the telemetering task is completed.

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 discloses a security encryption control method and system for a space-ground integrated electric power information network and a storage medium, and relates to the technical field of electric power information security, and the method comprises the steps: building a space-ground integrated information network security attack logic library based on a quintuple model, and predicting potential attack information according to the information network security attack logic library; an AES algorithm is adopted to encrypt the power information transmission data packet at the potential attack position; and based on a differential privacy algorithm, fusing the potential attack risk degree and a data sensitivity result to add noise to the encrypted power information transmission data. According to the method provided by the invention, the control gain of noise addition in the differential privacy algorithm is determined according to the potential attack risk degree and the sensitivity result, and the sensitivity result is determined according to the satellite observation trajectory, so that the electric power information transmission data is finally processed in a targeted manner according to the potential attack risk degree and the characteristics of the satellite constellation; and the security in the information transmission and access process of the power system is improved.

The invention relates to the technical field of satellites, in particular to a deployment method of a low-orbit large-scale satellite constellation, which comprises the following steps: S1, establishing a static network for launching deployment by taking each orbit and a launching site as nodes and taking a satellite transportation path between the nodes as an edge; the network side comprises non-time dimension information of each node; s2, on the basis of the static network, traversing all possible paths according to launch interval time of the vehicle and orbit dynamics to obtain a time expansion network; s3, a parking track and a target track are obtained, and a two-channel logistics network model is constructed according to the parking track and the target track; s4, based on the two-channel logistics network model, establishing a multivariable mixed integer optimal mathematical equation according to information contained in nodes and edges in the time expansion network; and S5, solving the two-channel logistics network model according to the mathematical equation to obtain an optimal launching deployment scheme of the satellite constellation.