156 results about "Beam hopping" patented technology

The invention discloses an ocean communication on-demand service coverage method and device based on a low-orbit satellite hopping beam, and relates to the technical field of satellite communication, and the method comprises the steps: determining the position of each user terminal on the ocean through a low-orbit satellite; determining the number of beam positions and the position of each candidate beam position center point according to the position of each user terminal; based on the position of each user terminal and the position of the central point of each candidate beam position, taking the low-orbit satellites as relays for communication between each user terminal and a ground station, and constructing an optimization model of multi-low-orbit satellite joint hopping beam and user terminal transmitting power; and in each time slot, a layered heterogeneous multi-agent deep reinforcement learning method is adopted to solve optimization variables of the optimization model in a single time slot, the optimization variables comprise uplink transmitting power of the user terminal, a hopping beam pattern of a low-orbit satellite and sub-channel allocation, and the service coverage performance and the wireless resource utilization rate of ocean communication can be improved.

The invention provides a low-orbit satellite resource allocation method and device based on beam and frequency domain collaborative optimization, and the method comprises the steps: dividing the overall bandwidth of a user region into a central sub-band and an edge sub-band through employing a dynamic soft frequency reuse scheme; all ground users are subjected to spatial clustering according to geographic positions and traffic demands, coverage cells are dynamically divided according to clustering results, and balanced service is achieved; on the basis of dynamic cell division, user clusters with high service volume are selected according to priorities, a beam activation set is generated, and a hopping beam matrix is updated; establishing a channel model between a user and a beam and a switching matrix between satellites; constructing a system utility target, and constructing a multi-target optimization problem model by taking the system utility target as a main part and integrating interference, switching overhead and delay penalty; and the multi-dimensional resource collaborative optimization framework based on deep reinforcement learning reconstructs a multi-objective optimization problem model, and outputs a solution of the multi-objective optimization problem model, including an optimal bandwidth and a power allocation result. According to the invention, resource allocation can be carried out on low-orbit satellites.

A method of wireless communication at a UE is disclosed herein. The method includes receiving, via a satellite and over a first bandwidth and a first beam, at least one of an SSB or a SIB for a cell. The method includes receiving, via the satellite and over a second bandwidth and a second beam, at least one of a CSI-RS or DM-RS for data transmission for a zone within the cell, where the first bandwidth is less than the second bandwidth, and where a first width of the first beam is greater than a second width of the second beam. The method includes communicating via the satellite based on at least one of the SSB, the SIB, the CSI-RS, or the DM-RS.

The invention discloses a multi-beam satellite system transmission optimization method and device fused with image semantic compression, and the method comprises the steps: constructing a multi-beam satellite system model fused with image semantic compression, determining an area irradiated by a multi-beam satellite beam according to a beam hopping mechanism through a multi-beam model, and determining a GPU resource allocation scheme and a power resource allocation scheme; a satellite communication channel state is sensed through a semantic communication model based on a SwinJSCC architecture so as to adjust a compression ratio of image semantic information, and multi-dimensional optimization of image data transmission performance is realized; a multi-agent is constructed based on a multi-beam satellite system model and a semantic communication model, the agent corresponds to a beam hopping mechanism, a GPU resource allocation scheme and a power resource allocation scheme in the multi-beam satellite system model, and the agent learns and optimizes a decision strategy under a multi-agent architecture. Therefore, the resource scheduling in the dynamic hopping beam scene is matched with the service demand.

The invention discloses a satellite beam scanning scheduling method and device and a storage medium. The method belongs to the field of satellite communication, and comprises the following steps: acquiring parameter characteristics of coverage areas of multiple beams of a satellite; inputting the parameter features into a pre-trained neural network model, and determining sub-bands adapted to the plurality of beams through the neural network model; a chromosome vector is initialized, an initial population is constructed, and the chromosome vector is used for indicating the beam position scanned by each beam of the satellite in each beam hopping time slot of the beam hopping period; constructing a fitness function; performing iterative optimization on the initial population according to a genetic algorithm, and determining an optimal chromosome vector; and according to the optimal chromosome vector, determining the beam position scanned by each beam in each beam hopping time slot of the beam hopping period. Therefore, coverage overlapping and sidelobe leakage interference of same-frequency beams are avoided to the maximum extent from the scanning time sequence dimension, and dual targets of sub-band adaptation and interference suppression are synchronously achieved.

The invention discloses a low-earth-orbit satellite beam scheduling and user grouping method, device and equipment and a storage medium, and relates to the technical field of communication, and the method comprises the steps: carrying out the stage processing of beam resources of a low-earth-orbit satellite, and obtaining a first-stage beam, a second-stage beam and a third-stage beam; scanning an existing signaling beam position based on the first-stage beam, and determining a target signaling beam position of the user equipment; random access is carried out on the target signaling beam position based on a second-level beam, and the position of user equipment corresponding to the target signaling beam position is determined; clustering the position of the user equipment based on the third-level beam, and determining a user clustering set and a clustering centroid of the user clustering set; and taking the clustering centroid of the user clustering set as a center coverage position of a third-level beam to complete beam hopping scheduling. Through the above mode, multi-beam multi-user scheduling is realized, the user access waiting time is reduced, the resource utilization efficiency is ensured, the interference is reduced, and the throughput rate is improved.

The invention provides a communication method, a communication device and communication equipment, is used for improving the communication performance of beam hopping communication, and belongs to the technical field of communication. In the method, a ground access network device adjusts the sending time of target data according to a feed transmission delay determined in real time, or a satellite adjusts the beam position switching time of a beam according to the feed transmission delay determined in real time, so that the time when the target data arrives at the satellite is matched with the beam position switching time of the beam of the satellite; in this way, the target terminals located within the coverage range of the first beam position and the second beam position can completely and accurately receive the data sent by the ground base station, and the communication performance of beam hopping communication is improved.

The invention discloses a satellite beam scanning scheduling method and device for preventing same-frequency interference and a storage medium. The method belongs to the field of satellite communication, and comprises the following steps: determining sub-bands respectively adapted to a plurality of beams of a satellite; initializing a particle swarm, wherein each element of a particle vector of the particle swarm indicates a beam position scanned by each beam of the satellite in each beam hopping time slot of a beam hopping period through different numerical intervals; a fitness function is constructed, and the function value of the fitness function is related to the severity of the same-frequency interference in the satellite coverage area; performing iterative optimization on the particle swarm according to a particle swarm optimization algorithm, and determining an optimal particle vector; and according to the optimal particle vector, determining the beam position scanned by each beam in each beam hopping time slot of the beam hopping period. According to the invention, by optimizing the beam position scanning scheduling scheme of the beam in the beam hopping period, the coverage overlapping and signal cross interference of adjacent same-frequency sub-beams are effectively avoided.

Beam hopping (BH) approaches are described herein for integrated terrestrial-non-terrestrial network (iTNTNs) having a terrestrial radio access network integrated with multi-beam satellite communications. A macro-level BH configuration can be generated, based on present and projected network data, to include synchronized traffic channel and acquisition channel BH cycles, each with respective cycle durations and dwell resolutions. The configuration can also include a PNT channel BH cycle with its own cycle duration and dwell resolution for use by a dedicated PNT beam. The macro-level configuration can be used to define a micro-level configuration for each of multiple traffic and control (TnC) beams, including certain time slots for cell acquisition and remaining time slots for allocating TnC communications to cells in proportion to their traffic demands. Concurrent beam hopping by the TnC Beams and the PNT beam in accordance with the BH cycle configurations provides efficient multiplexing of traffic, control, and PNT communications.

The present application discloses a low-orbit satellite beam scheduling and resource allocation method, device, equipment and storage medium, which relates to the field of communication technology. The method includes: determining the time slot priority of the user to be scheduled; dividing the users to be scheduled into different user groups and determining the wave position interference matrix between the user groups; allocating time slots based on the time slot priority of the user to be scheduled and the wave position interference matrix between the user groups, and generating a beam hopping spectrum; within the update period of the beam hopping spectrum, determining the target user to be scheduled corresponding to the available beam in each time slot; allocating resources to each time slot based on the service priority of the target user to be scheduled for the available beam in each time slot. Through the above method, interference isolation and time slot allocation calculation are completed based on user priority and user grouping, multi-user resource allocation scheduling is performed in a single time slot, air interface resource information is fully utilized, and spectrum utilization and system throughput are maximized.

The invention provides a hopping beam pattern design method, a base station, a storage medium and a program product. The hopping beam pattern design method comprises the following steps: determining a hopping beam pattern set in a current hopping beam scheduling period according to a service application condition of each beam in a previous hopping beam scheduling period; and issuing the hopping beam pattern set to the user equipment.

The invention provides a hopping beam resource allocation method and device based on deep reinforcement learning. The method provided by the invention comprises the following steps: acquiring state information of all arriving data packets in each data packet cache region based on the data packet cache regions configured by the satellite-borne equipment; performing state reconstruction on the data packets based on the state information to obtain a time delay matrix corresponding to each data packet cache region; inputting the time delay matrix into a trained resource allocation model, and predicting to obtain different action vectors and corresponding expected return values; predicting expected return values on the basis of the updated resource allocation model, arranging the predicted return values in a descending order, determining corresponding beams on the basis of action vectors corresponding to a preset number of expected return values arranged at the foremost, and lightening the beams. The hopping beam resource allocation method and device based on deep reinforcement learning provided by the invention are used for improving the adaptive capacity to the dynamic environment of a low-orbit satellite and realizing efficient hopping beam scheduling.

The embodiments of the present disclosure belong to the technical field of communications. Disclosed are a beam hopping resource determination method and apparatus, a beam hopping resource indication method and apparatus, and a storage medium. The beam hopping resource determination method comprises: a terminal receiving first information which is sent by a network device at a first beam position of a beam hopping time pattern, wherein the first information at least comprises service time information of the first beam position, the beam hopping time pattern is used for indicating service time information of each beam position among a plurality of beam positions, and the plurality of wave positions comprise the first beam position.

The invention provides a method for testing a phased array compact range of a high-orbit communication satellite. The method comprises the following steps: unfolding and fixing a whole satellite antenna on the ground; confirming that a test coupler is installed and a cable is connected normally; uploading software to a phased array antenna and confirming that the function is normal; setting a phased array transponder path, switching on the change-over switch, and opening the active single machine and the phased array on the path; after the phased array is preheated through telemetering, system-level testing is carried out, wherein at least one performance parameter such as noise spectrum and equivalent omnidirectional radiation power and functions such as program control pointing and beam hopping are tested; program control pointing function verification is performed according to wave beam program control preset pointing, and the DUT turntable is matched to verify the precision; hopping beam function verification jumps according to a preset time slot, and a Zero Span mode of a frequency spectrograph analyzes a time domain characteristic verification time sequence; and switching the phased array to standby after verification, shutting down after telemetering is normal, and recovering the on-satellite state. In this way, it can be ensured that the integration performance of the phased-array antenna and the transponder system meets the design requirement through quantitative analysis.

Disclosed in an embodiment of the present application are a determination method, indication method and apparatus for a hopping beam resource, and a storage medium, the determination method comprising: a terminal receiving first information sent by a network device on a first beam position of a hopping beam time pattern, the first information at least comprising service time information of the first beam position; wherein the hopping beam time pattern is used for indicating the service time information of each beam position in a plurality of beam positions, and the plurality of beam positions comprise the first beam position. According to the embodiment of the invention, the indication of the hopping beam resource can be flexibly realized.

The invention relates to a wireless communication network technology, and discloses a covering and scheduling method and system for a low earth orbit satellite network to support a traditional broadcast service, and the method comprises the steps: forming a list containing all broadcast users with resource demands, grouping the users, and outputting a cell range with broadcast service demands; calculating to obtain a target throughput rate demand of each cell and a total target throughput rate demand of all broadcast demand cells under the coverage of a single satellite, wherein the satellite is based on signal quality information fed back by Internet users supporting bidirectional interaction in a target service cell and the target throughput rate demand of the cell; broadcast service beam resources needing to be distributed are obtained, beam hopping and beam staring processing is carried out, and the requirements of coverage and service continuity are met at the same time when broadcast users are served. According to the application, efficient, flexible and accurate broadcast resource scheduling and management can be realized, and continuous and seamless broadcast service experience is provided in a wide geographical range.

The invention belongs to the technical field of satellite communication and edge intelligent fusion, and relates to a low earth orbit satellite collaborative federated learning air aggregation system and a joint scheduling method, comprising: a plurality of static ground equipment terminals, a constellation network composed of a plurality of multi-beam low earth orbit (LEO) satellites, a ground data processing center, and a data processing center. The static ground equipment terminal is in communication connection with the multi-beam low-orbit satellite, and the satellite is in communication connection with the ground data processing center through a gateway; global model training is completed through a double-layer air aggregation mechanism of equipment terminal-LEO satellite-data processing center, an optimization model is constructed, a wave beam hopping mode, terminal transmitting power and a receiving end normalization factor are jointly optimized, a loss function of the training model is minimized, an air aggregation error is taken as a constraint, and the overall performance of the device terminal-LEO satellite-data processing center is improved. Adaptive scheduling is realized through deep reinforcement learning; according to the method, the multi-device cooperative training efficiency can be remarkably improved, and efficient federal learning of large-scale distributed devices is achieved.

A method for designing a beam hopping pattern of a low-orbit satellite belongs to the field of low-orbit satellite communication, and comprises the following steps: dynamically clustering ground cells by using a hybrid clustering cell clustering algorithm according to the service requirements of the cells in a beam hopping scene, and enabling the cells in the same cluster to approach as much as possible on the basis of load balancing; dividing user satisfaction indexes into three levels to guide three dynamic operations; selecting an optimal individual to generate a progeny by using the overall user satisfaction of all cells in the whole beam hopping period; performing individual gene crossover by using the community user satisfaction of each cluster; performing individual gene variation by using the user satisfaction of a single cell; and fine tuning of beam power is carried out when each beam of the beam hopping pattern is served in the same time slot. According to the method, load balancing and geographic position compactness are comprehensively considered, the same-frequency interference is reduced, the resource utilization efficiency is improved, the calculation overhead is reduced, and the overall calculation efficiency is improved.

The invention relates to a low-orbit satellite communication system dynamic wave beam hopping method and a satellite communication system, and the method comprises the steps: taking the minimization of the number of cells as a target and the minimum center spacing as a constraint, constructing a cell division model, and solving the cell division model to obtain a cell division result; taking minimization of the maximum load gap between the satellites as a target, taking the cell division result as a constraint, constructing a load balancing model, solving the load balancing model, and determining a cell-satellite ownership relationship; and with user service quality index weighted optimization as a target and the cell-satellite affiliation relationship as a constraint, satellites are used as intelligent agents, and multi-satellite joint optimization is realized by adopting a reinforcement learning algorithm. According to the method, the cell average time delay and the packet loss rate can be reduced, and meanwhile, the low cell average time delay variance can still be kept.

The invention provides a beam hopping control method, electronic equipment, a storage medium and a program product, and the method comprises the steps that a satellite load receives a transparent forwarding signal sent by a base station and corresponding beam control information, the beam control information is sent earlier than the transparent forwarding signal, and the beam control information is used for the satellite load to carry out beam hopping control; the satellite load determines the effective moment of the beam control information according to the transparent forwarding signal and the local frame header moment of the satellite load, and the effective moment of the beam control information is synchronous with the transparent forwarding signal. Under the condition that the base station is not required to synchronously send the transparent forwarding signal and the corresponding beam control information, the satellite load can determine the effective moment of the beam control information according to the transparent forwarding signal sent by the base station and the local frame header moment of the satellite load, so that the effective moment of the beam control information is synchronized with the transparent forwarding signal; therefore, accurate and efficient control of the satellite load hopping beam can be realized.

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 discloses a joint beam hopping and precoding scheduling method based on an RSMA multicast satellite system, and relates to the technical field of satellite communication, and the method comprises the steps: building a multicast multi-beam satellite communication system model based on simulation parameters of a satellite communication system; the model comprises a plurality of antenna feed sources and clusters; determining the total provided capacity of different clusters in each time slot through time slot allocation and a beam hopping mode; determining the optimization problem of the model according to the total provided capacity of different clusters; the optimization variables of the optimization problem are the optimal solutions of the precoding vector, the common rate allocation and the CBH strategy vector, which are solved based on a weighted minimum mean square error method. And solving the optimal solution of the CBH strategy vector based on an integer programming method. And determining an optimized multicast multi-beam satellite communication system model by integrating the optimal precoding vector, the common rate allocation and the CBH strategy vector. According to the invention, the interference between beams in the cluster is reduced, and the communication reliability is improved.

The invention provides a near-zero power consumption beam-hopping satellite communication system resource allocation method based on NOMA, and belongs to the technical field of beam-hopping satellite communication systems. Users in the same beam are divided into time delay sensitive users and time delay tolerant users, a hopping beam time slot is divided into a data transmission stage and an energy collection stage through a time division multiplexing mechanism, and radio frequency energy generated by the time delay sensitive users is used for supplying power to the time delay tolerant users; the method comprises the following steps of: establishing a data transmission rate and power distribution joint optimization model by taking the minimization of the difference between the total transmitting power and the user request flow of a beam hopping satellite and the minimization of the delay sensitive user service interruption probability as targets, and constructing a deep reinforcement learning framework in combination with a multi-dimensional optimization space; deploying the deep reinforcement learning network framework in a satellite-ground cooperative manner, and performing offline training and verification of the model at a gateway station; and uploading the trained model parameters to a beam hopping satellite, and dynamically adjusting a beam hopping pattern, a power distribution coefficient and a time slot division parameter according to real-time service requirements.

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 present disclosure relates to a communication method, apparatus, device, and system, and a storage medium. The communication method may be performed by a terminal. The method comprises: sending first information, the first information comprising configuration information of at least one first beam, and the at least one first beam being used for providing a service for a terminal by means of a beam hopping mode. By means of the solution of the present disclosure, support by an NTN for beam hopping can be implemented, and system resource utilization can be improved.

The invention discloses a navigation method and device based on a low earth orbit satellite and a storage medium, and belongs to the field of satellite communication. The method comprises the following steps: determining a cluster corresponding to a target beam, and determining each beam position in the cluster; determining the track information of the vehicle at each wave position in a predetermined period every predetermined period, and determining the road complexity in the coverage area of each wave position; according to the track information, determining the average speed of the vehicles at each wave position in a predetermined period and the average distance between the vehicles; determining a risk coefficient of each wave position based on the average speed, the average distance and the road complexity; and according to the risk coefficient, determining a time proportion of connection between each beam position and the low-orbit satellite in the beam hopping period, and according to the time proportion, scheduling the target beam. According to the invention, a dynamic scheduling mechanism is adopted, so that satellite resources can be accurately allocated according to actual requirements in a complex traffic environment, and the signal coverage quality and the overall efficiency of navigation service are improved.

The invention belongs to the technical field of low earth orbit satellite communication, and particularly relates to a low earth orbit satellite large-scale hopping beam efficient scheduling method and system based on an interference approximation model. According to the method, downlink beam resources of a multi-beam low-orbit satellite are used as research objects, and the problems that in existing large-scale and long-period beam scheduling, the performance evaluation complexity of a beam scheduling strategy is high, and the complexity of a beam scheduling algorithm is rapidly increased along with the increase of variable dimensions are solved. The invention provides low-complexity design and application based on an inter-beam interference approximation model, the inter-beam interference approximation model is introduced from a probability perspective, a rapid performance evaluation method is designed, and a low-complexity scheduling method is designed for two typical low-orbit satellite beam scheduling problems by utilizing an introduced beam activation intensity concept.

A method of a base station may comprise: configuring an allocation time, a hopping pattern period, and a beam hopping scheduling interval; generating a hopping pattern by allocating beams to N×M hopping slots according to scheduling information collected from a plurality of terminals based on a number M of simultaneously transmittable beams, a number N of hopping rounds within the hopping pattern period, a basic allocation power, and the allocation time; and transmitting information on the hopping pattern to a terminal, wherein the hopping pattern period is an integer multiple of the allocation time, the beam hopping scheduling interval is an integer multiple of the hopping pattern period, and M and N are positive integers.

A non-terrestrial network communication method, a base station, and user equipment, relating to the field of wireless communications. A base station determining the gain of each beam position in a first beam hopping position period; according to the gain of each beam position in the first beam hopping position period, allocating a beam hopping pattern for each beam position in a second beam hopping position period, wherein the first beam hopping position period is the beam hopping position period preceding the second beam hopping position period; and sending the beam hopping pattern of each beam position in the second beam hopping position period to user equipment. A "beam hopping position" activation mode is used in an activated beam, and on the basis of the beam hopping pattern, more refined activation control at the granularity of beam positions within the beam is achieved, satellite transmit power is further concentrated, and satellite coverage and service performance are improved.

Systems, methods, and circuitries are provided for adjusting the timing of random access channel occasions (ROs) and paging occasions (POs) based on a beam coverage pattern. In on example, a method includes determining a sequence of one or more radio frames that include random access channel (RACH) occasions (ROs) or paging occasion (PO) based on a beam coverage pattern with respect to a user equipment (UE), wherein the UE has discontinuous beam coverage according to the beam coverage pattern. The method includes monitoring for a RACH message from the UE or transmitting a paging message to the UE during at least one of the sequence of radio frames.