124 results about "Beam hopping" patented technology

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 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 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 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.

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.

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 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 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.

The application discloses a broadcast beam hopping method, a satellite beam hopping device and an interference coordinator. The method comprises the following steps: calculating beam characteristic values of multiple beams according to beam characteristic information of the multiple beams; and determining a hopping rule of a broadcast beam according to the beam characteristic values of the multiple beams.

The invention relates to the technical field of satellite communication, in particular to a mobile phone direct connection communication system resource allocation method based on double-satellite distributed beam forming, which comprises the following steps of: initializing a double-low orbit satellite communication scene, establishing a cooperative communication model based on distributed beam forming, and establishing a beam hopping decision model based on A3C reinforcement learning. Through joint optimization of beam hopping and power distribution, the method provided by the invention can provide precise high-power signal enhancement for a smart phone user, and dynamically adapt to spatial and temporal changes of ground service requirements, so that the power and time resources of a double-satellite system can be fully utilized, and the method is suitable for popularization and application. And finally, collaborative optimization of service fairness between the users and the overall energy efficiency of the system is realized.

Example embodiments of the present disclosure are directed to a solution for beam hoping in wireless communication. A method comprises receiving, from a second apparatus, a configuration of one or more hybrid periods within a beam hopping cycle associated with at least one beam footprint or a cell; and at least based on a reception of the configuration and / or an activation indication for at least one hybrid period, perform, during the at least one hybrid period, at least one of a downlink reception or an uplink transmission.

The invention discloses a block coordinate descent and matching theory-based low-orbit satellite hopping beam calculation unloading method, and belongs to the field of low-orbit satellite communication. The method comprises the following steps: firstly, a core network counts the reported service demand of each user, considers the lower limit of time delay satisfaction, and constructs a hopping beam and resource scheduling initial model; and then, based on a matching theory, carrying out hopping beam pattern initialization, and obtaining an optimal solution of unloading-resource scheduling by using a block coordinate descent algorithm, thereby obtaining the delay satisfaction degree of each sink node corresponding to the hopping beam pattern. And then, the core network randomly selects satellites and two different time slots to execute exchange matching, updates a beam hopping pattern and unloading-resource scheduling, selects and rejects the updated beam hopping pattern according to the time delay satisfaction degree, and iteratively updates repeatedly until the number of times is reached. And sending the finally reserved hopping beam pattern and the corresponding optimal resource scheduling strategy to each user / satellite node, and carrying out beam lightening and unloading strategy execution. According to the invention, the management complexity is effectively reduced.

The present application discloses a joint beam hopping and precoding scheduling method for an RSMA multicast satellite system, which relates to the field of satellite communication technologies. The method includes constructing a multicast multi-beam satellite communication system model based on satellite communication system simulation parameters; the model includes a plurality of antenna feeds and clusters; through time slot allocation and beam hopping patterns, determining the total provided capacity of different clusters within each time slot; based on the total provided capacity of different clusters, determining the optimization problem of the model; the optimization variables of the optimization problem are precoding vectors, common rate allocation, and CBH strategy vectors, and solving the optimal solutions of the precoding vectors and common rate allocation based on the weighted minimum mean square error method. Solving the optimal solution of the CBH strategy vector based on the integer programming method. Combining the optimal precoding vectors, common rate allocation, and CBH strategy vectors to determine the optimized multicast multi-beam satellite communication system model. The present application reduces the interference between beams within a cluster and improves the reliability of communication.

The invention relates to a low-earth-orbit satellite hopping beam random access method and a low-earth-orbit satellite hopping beam random access system. The method comprises the following steps: a ground relay sends an initialization parameter to each ground device in a coverage range in a broadcast mode; the ground relay receives an access frame sent by each ground device, and performs serial interference elimination and capture on a data packet of each access time slot in the access frame to obtain a conflict-free target data packet; the ground relay reports the to-be-uplink data volume corresponding to the conflict-free target data packet to a satellite through a control channel, so that the satellite performs beam hopping planning according to the to-be-uplink data volume; and the ground relay receives the hopping beam planning result sent by the satellite, and performs uplink transmission on the data packet of each ground device according to the hopping beam planning result. Therefore, multiple times of signaling interaction between the ground equipment and the satellite can be avoided, the transmitting power requirement of a user is reduced, the energy consumption is reduced, the service life of the ground equipment is prolonged, the interference between beams can be reduced, and the access capacity is greatly improved.

The invention discloses a DTX (Discontinuous Transmission) and / or DRX (Discontinuous Reception) configuration method, device, equipment, medium and program product. A network side sends cell-level and / or beam-level DTX and / or DRX configuration information to a terminal side for data transceiving. By adopting the technical means of the invention, the DTX and / or DRX configuration of the beam granularity can be provided, the DTX and / or DRX mechanism enhancement of the NTN multi-beam hopping scene can be realized, and the power consumption of the NTN system can be effectively reduced.

The embodiment of the invention provides a satellite communication method based on a hopping beam, a cell grid division method and a base station, and relates to the technical field of satellite communication. The longitude and latitude position of a user terminal is obtained; obtaining a preset cell grid definition rule; the cell grid definition rule comprises a grading and partitioning rule based on geographic latitude and longitude and is configured to enable the grid area to be smaller than the minimum coverage range of a satellite beam; according to the latitude and longitude positions and the cell grid definition rule, determining the latitude and longitude position of a central point of a target cell grid where the user terminal is located; beam pointing is controlled according to the longitude and latitude position of the central point, aggregation service is provided for the user terminal in the target cell grid, the effect of reducing satellite calculation complexity is achieved, and the method can be applied to a beam resource scheduling scene in a satellite internet communication scene or a position management scene of the user terminal in a core network.

The invention provides a satellite beam broadcasting method and device based on parameterized reinforcement learning, and relates to the field of satellite resource scheduling, and the method comprises the steps: obtaining a state parameter of one beam at a current moment, inputting the state parameter into a trained parameterized reinforcement learning model, obtaining a scheduling scheme and a reward function which are output by the parameterized reinforcement learning model and correspond to the wave beam; updating the state parameters, and taking the updated state parameters as input of the next beam to the parameterized reinforcement learning model to obtain a scheduling scheme and a reward function corresponding to the next beam output by the parameterized reinforcement learning model; and repeating the steps to obtain a scheduling scheme of each beam. According to the invention, the beam hopping and power distribution scheme of the multi-beam satellite system can be adjusted at the same time, and the throughput and energy efficiency of the multi-beam satellite system are maximized.