124 results about "Spot beam" patented technology

The invention discloses a multi-beam cooperative scheduling method and a multi-beam cooperative scheduling system for low-orbit satellite communication, which mainly solve the problems of poor beam scheduling flexibility and difficulty in adapting to time-varying requirements in a high-dynamic environment in the prior art, and the implementation scheme of the multi-beam cooperative scheduling method comprises the following steps of: collecting online user information by a low-orbit satellite through a wide beam; a hopping beam position is generated by using adaptive clustering under the constraint of channel resources; a hopping beam scheduling algorithm based on deep reinforcement learning outputs an optimal scheduling strategy according to the real-time environment variable; and optimizing a beam hopping time frame structure in each scheduling period, covering accessed users in a beam position through spot beams, and sending service data and control information to complete efficient service transmission. The method can adapt to changes of user distribution and service requirements in low-orbit satellite communication, the utilization rate of spectrum resources is improved, communication delay is reduced, the overall performance and service quality of the system in a high-dynamic environment can be enhanced, and the method can be used for dynamic beam position division, hopping beam scheduling and hopping beam resource allocation in a multi-beam low-orbit satellite communication scene.

The invention discloses an in-orbit pointing deviation correction method for a two-dimensional mechanical antenna oriented to a panel satellite spot beam. The method comprises the following steps: acquiring an azimuth angle, a pitch angle and telemetry information of an antenna pointing to a ground station in real time in an in-orbit manner; reversely calculating a gain difference value between the actual signal and the theoretical signal; judging whether the gain difference meets the pointing precision requirement or not, and if not, inversely calculating the deviation angle of the actual pointing vector and the theoretical pointing vector and the actual pointing vector; a Gauss-Newton method is adopted to solve an optimal theoretical pointing vector; resolving an installation matrix pointed by the matching theory and adjusting an antenna installation matrix; and repeating the steps to form a closed loop until the gain difference meets the precision requirement. According to the method, three-dimensional installation matrix correction is adopted to replace traditional zero correction, closed-loop feedback and nonlinear optimization are combined, multi-source error high-precision compensation is achieved, the engineering feasibility is high, the in-orbit multi-satellite batch correction requirement of the panel satellite is met, and the communication system reliability and the data transmission rate are remarkably improved.

The invention provides a communication resource scheduling method and system for a low-orbit satellite, and the method comprises the steps: transmitting a spot beam to a target region by the low-orbit satellite through a directional antenna, and starting to provide communication services for all target terminals in the coverage range of the spot beam; when the preset switching period is ended, the satellite resource control center determines a new low earth orbit satellite taking over the target area according to the real-time motion information of the low earth orbit satellite; controlling the new low-orbit satellite to adjust the pointing angle of the directional antenna so as to enable the spot beam emitted by the new low-orbit satellite to cover the target area; meanwhile, beam switching instructions are generated and sent to all target terminals in batches; and all the target terminals execute a beam switching action so as to continuously provide communication services for all the target terminals through the spot beams emitted by the new low-orbit satellites. According to the invention, unified beam switching of all user terminals in the target area is realized, the situation of high concurrency of switching instructions of a satellite resource control center when the number of users is large is avoided, and the communication response speed of the users is improved.

Systems and methods for a satellite communication system include identifying highly active terminals (HUTs) in a spot beam of a satellite; determining a first ratio of single-band HUTs that operate in a first frequency band only to multi-band HUTs that operate in the first frequency band and a second frequency band; and determining a second ratio of outroutes for the first frequency band to outroutes for the second frequency band. When the first ratio is less than the second ratio, a first step of balancing the single-band HUTs across the outroutes for the first frequency band is performed, and then the multi-band HUTs are balanced across both the outroutes for the first frequency band and the outroutes for the second frequency band. When the first ratio is greater than the second ratio, the single-band HUTs and the multi-band HUTs are allocated based on at least one weight factor.

According to implementations, a UE may obtain measurements for signals received over different elevation angles. Subsequent to obtaining the measurements, the UE may transmit a feedback report including at least one of indications of the measurements, indications of UE capabilities as well as indications regarding constraints on beam directions. Upon receipt of feedback reports from a plurality of UEs, a network node may configure a UE-centric BTC for each UE in the plurality of UEs and then transmit UE-centric BTC configuration information to each UE for communicating at least one of physical signals and physical channels.

Methods, systems, and apparatus for mobile satellite beam resource allocation are described. Communication services may be provided to a mobile terminal via respective beamformed spot beams that track movement of the mobile terminal. The central server may perform resource element allocation by determining, for a repetitive period of time, an interference event associated with a beam for a current period of time; determining a resource element to be associated with an interference beam for a next time period; and directing the beam to a reallocation of the resource elements for the next time period. Each beam may be allocated to one or more resource elements based on a number of mobile terminals within a coverage of the beam or a desired data rate of the mobile terminals. The power associated with the resource element may be adjusted based on a data rate or user demand associated with the mobile terminal.

A method for optimizing satellite signal performance in a satellite transmission system. The method includes: obtaining signal data from at least some of the plurality of customer receivers, measuring the signal data from each of the signal beams that were obtained; analyzing metadata from the components of the satellite transmission system, signal source front end controls, and spectral sampling; identifying signal degradation at the satellite spacecraft in the space segment from the signal data of actual spot beam coverage using the measured signal data and the analyzed metadata; and predicting remediation actions to correct the signal degradation at the satellite spacecraft in the space segment.

A method (1200) performed by a wireless device (110) includes obtaining a remaining service time (Tservice) associated with a first satellite or first spot beam. Based on the remaining service time, the wireless device determines whether to initiate a connection with the first satellite or first spot beam.

Timing adjustments or frequency offsets that at least partially compensate for Doppler shift (e.g., due to distance of a satellite transmitter or relative speed of a terrestrial receiver) of a signal, physical channel, or resource during wireless transmission are configured. The characteristics compensated comprise one of resource element (RE) mapping, channel state information reference signal (CSI-RS) configuration, bandwidth part (BWP) configuration, or control resource set (CORESET) configuration. Information indicating the multiple configurations is transmitted from a base station (BS) to at least one user equipment (UE). The timing adjustments or frequency offsets are specifically configured for one UE, a group of UEs, or the UEs served by a single serving cell. Joint transmission from multiple cells / TRPs / spotbeams may involve partial / full subcarrier alignment.

The invention relates to a satellite communication network construction method based on large language model reasoning, and belongs to the field of operation and maintenance management and control of a satellite communication system. The method comprises the steps that large language model setting is initialized; analyzing and processing the demand input by the large language model; the large language model performs multi-step decomposition on demand input; the large language model inquires and judges whether resources are called or not, the resources of the movable spot beams are called according to the inquiry result, beam adjustment instruction parameters are generated, and the satellite management and control system completes beam pointing adjustment; the large language model calls a resource allocation agent to complete allocation; the large language model calls a resource allocation agent; and the large language model issues network construction parameters to complete satellite communication network construction. According to the method, the inference capability of the LLM model is utilized, automatic construction of the satellite communication network can be realized, and the intelligent requirement of satellite communication is met.

The invention discloses a light spot beam divergence angle calculation method and device based on adaptive threshold correction and a medium, and relates to the technical field of laser communication. The method comprises the following steps: continuously acquiring a debugging light spot picture output by image acquisition equipment, and calculating the maximum gray value of the debugging light spot picture; based on the maximum gray value, the exposure of the image acquisition equipment is adjusted until an initial light spot picture with the maximum gray value and the number of pixels reaching a preset threshold value is output; based on a preset initial pixel threshold value, calculating a pixel value variance of the initial light spot picture, and updating the initial pixel threshold value until a target pixel threshold value enabling the pixel value variance to reach a maximum value is obtained; setting a pixel value lower than a target pixel threshold value in the initial light spot picture to zero to obtain a target light spot picture; and calculating a first moment and a second moment of the target light spot picture to obtain a light spot beam divergence angle of the target light spot picture. According to the method, the calculation precision of the beam divergence angle of the light spot is improved by adjusting a threshold selection mechanism for maximizing the exposure degree and the variance.

A method for operating an infrastructure equipment forming part of a wireless communications network is provided. The infrastructure equipment is a non-terrestrial network part of the wireless communications network configured to transmit one or more spot beams to provide a wireless access interface for transmitting signals to and receiving signals representing data from a communications device within a coverage region of a cell or one of the spot beams, the spot beam forming a cell. The method comprises broadcasting system information for receipt by the communications device, the system information including information relating to at least one of a cell or a spot beam of a neighbouring infrastructure equipment and a second spot beam of the infrastructure equipment, wherein the system information is broadcast in accordance with at least one predetermined condition.

A UE receives a radio resource control (RRC) configuration of a first set of reference signals for beam failure detection (BFD) and receives a medium access control-control element (MAC-CE) indicating a second set of reference signals for the BFD. The UE performs the BFD for at least one of multiple transmission reception points (TRPs) using the first set of reference signals or the second set of reference signals based on a condition having been met.

In an embodiment, a method implemented in a WTRU comprises receiving a first message comprising first information indicating a configuration of a set of precoders, a set of correction factors, association between each precoder of the set of precoders with at least one correction factor from the set of correction factors, and at least one RS; receiving at least one reference signal; determining a first precoder based on at least one measurement on the at least one RS; determining a subset of correction factors associated with the first precoder; determining a correction factor from the subset of correction factors; determining a second precoder based on the first precoder and the determined correction factor; and transmitting a second message comprising second information indicating the second precoder.

The invention discloses a low-orbit satellite beam control method, electronic equipment and a computer readable medium, and the method comprises the steps: calculating channel parameters according to ephemeris information and position information of a low-orbit satellite and antenna parameters and transceiving parameters of a high-orbit satellite; determining a service data scheduling strategy and a semi-static transceiving window of the low-orbit satellite according to the channel parameters; based on the semi-static transceiving window, forwarding downlink control information (DCI) comprising the service data scheduling strategy and a downlink media access control (MAC) control unit (CE) comprising the semi-static transceiving window to the low earth orbit satellite through a current high earth orbit relay satellite of the low earth orbit satellite; and receiving uplink data returned by the low earth orbit satellite according to the DCI and the downlink MAC CE, wherein the type of the uplink data comprises service data and / or the uplink MAC CE. And the spot beam coverage range of the high-orbit relay satellite is effectively improved, so that the communication time delay between the low-orbit satellite and the relay ground station is reduced.

The invention discloses a method and system for realizing multiple data services based on a state machine, and the method specifically comprises the steps: setting a working mode at an equipment interface, selecting a multi-spot beam working mode, and transmitting the multi-spot beam working mode to service communication processing software; setting the state of the system state machine as a network management searching state of a multi-spot beam working mode, and starting a startup network access process in the network management searching state until the state is switched to a multi-spot beam mode waiting service state of the system state machine; after a master control call application message is received in a multi-spot beam mode waiting service state, establishing a multi-spot beam mode calling call service state machine; and after the network management communication detection message is received in the multi-spot beam mode waiting service state, establishing a multi-spot beam mode called call service state machine. According to the invention, the same terminal device can receive calls of other terminal devices while carrying out a calling service, and receives service requests of other terminal devices as a called terminal, so that the use frequency of the terminal device is improved.

Systems and methods for uplink transmission timing are provided. In some embodiments, a method of operation of a wireless device in a cellular communications network includes receiving a transmission, from a network node, in a downlink slot; determining a reference uplink slot index in an uplink frame timing of the wireless device where the reference uplink slot index corresponds to the downlink slot in which the transmission was received; and transmitting an uplink transmission in response to the received transmission in an uplink slot a number of slots, K, after the determined reference uplink slot index. This may enable transmission in satellite radio access networks by establishing the transmission timing relationships that are suitable for long propagation delays and the large differential delay in a spotbeam in satellite communications systems that may range from sub-milliseconds to tens of milliseconds.

To provide a method and an apparatus for controlling beam current in an ion implantation process, which reduce the amount of "tune" time employed for such a calibration process using a uniform current density across the wafer surface.SOLUTION: A method includes receiving a spot beam profile (SpotBP) for the spot ion beam, receiving a linear scanned beam profile (ScannedBP) for the spot ion beam, generating a calculated calibration spot profile on the basis of the spot beam profile and the linear scanned beam profile, and implementing an adjusted scanned profile for the spot ion beam on the basis of the calculated calibration spot profile.SELECTED DRAWING: Figure 10

The application discloses a kind of self-adapting threshold correction spot beam divergence angle calculation method, equipment and medium, it is related to laser communication technical field.The method includes: continuously obtaining the debugging spot picture of image acquisition equipment output, and the maximum gray value of debugging spot picture is calculated;Maximum gray value is based, and the exposure of image acquisition equipment is adjusted, until the initial spot picture of maximum gray value and pixel number reaches preset threshold value is output;Based on preset initial pixel threshold value, the pixel value variance of initial spot picture is calculated, and initial pixel threshold value is updated, until the target pixel threshold value that makes pixel value variance reach maximum value is obtained;Zero is placed in the pixel value lower than target pixel threshold value in initial spot picture, to obtain target spot picture;The first moment and second moment of target spot picture are calculated, to obtain the spot beam divergence angle of target spot picture.The application is by adjusting exposure and variance maximization threshold selection mechanism, to improve the calculation precision of spot beam divergence angle.

A satellite communications system (SCS) (20) implements a beam recentering function (32) that dynamically recenters one or more spot beams (10) with respect to their corresponding nominal beam coverage areas (40), as a component of user scheduling. Updating the beam center target (46) of a spot beam (10) can be understood as adjusting beamforming by the SCS (20) to move the beam center (14) of the spot beam (10), such that maximum signal power of the beam corresponds to different locations within the same nominal beam coverage area over time. In an example embodiment, the SCS (20) uses dynamic beam centering with respect to a plurality of forward user beams (100), with the underlying beamforming being ground-based beamforming, such as end-to-end beamforming, or being satellite-based beamforming, which may be supported by ground-based or satellite-based computation of the dynamically changing beamforming solution.

An integrated antenna device and a phase calibration method thereof are provided. The integrated antenna device includes an antenna array formed by patch antenna units and a beamforming integrated circuit. The antenna array is disposed on a first surface of a substrate. The patch antenna units are symmetrically arranged around an array center of the antenna array, and each of the patch antenna units includes a first feed point and a second feed point. The BFIC is disposed on a second surface of the substrate and connected to the first feed point and the second feed point of each patch antenna unit. The first feed point and the second feed point of each patch antenna unit are disposed outside each patch antenna unit relative to the array center of the antenna array. The BFIC overlaps a central area of the antenna array.

A headlight assembly for a vehicle includes a foreground light source configured to project light over a first field of view greater than 20-degrees wide, and a spot beam light source that includes a plurality of pixel light sources configured to project light over a second field of view smaller than the first field of view and overlapping the first field of view. The foreground light source and the spot beam light source are operable together in a low-beam mode to generate a combined low-beam projection pattern. A lighting system for a vehicle comprises two headlight assemblies. Each of the headlight assemblies includes: a foreground light source, and a spot beam light source having a plurality of pixel light sources. The lighting system also comprises a controller in communication with the spot beam light sources to communicate pattern data thereto for controlling a cut-off pattern of the light projected therefrom.

The invention provides a space-based GPS M code signal power monitoring method and system, and the method comprises the steps: receiving a GPS signal, and outputting a digital signal; adopting a band-pass filtering mode to extract a GPS M code digital signal; reading dynamic information data of a low-orbit satellite platform and dynamic information data of a GPS satellite; estimating GPS M code signal delay and Doppler; estimating the carrier phase of the GPS M code signal; generating a GPS M code signal local carrier; multiplying the generated GPS M code signal local carrier by the GPS M code digital signal extracted by filtering to complete GPS M code signal carrier demodulation; carrying out pseudo code elimination on the GPS M code signal; the signal-to-noise ratio of the signal component is improved through coherent integration; and estimating the power of the GPS M code signal. The method has the advantages that the defect that a traditional foundation monitoring GPS M code signal power means cannot monitor GPS M code signal spot beam power enhancement is overcome.

A system and method for managing handoff in software-defined wide area network (SD-WAN) in aero or mobility situations, where terminal is capable of switching across multiple high throughput satellite (HTS), low-latency wireless spot beams and cell. The system receives at least one packet for upstream / downstream transmission over communication network. The system classifies packets based on data types associated with packets and assigns wireless path associated with first network transport modem for upstream / downstream transmission of packets classified as interactive traffic data type. Furthermore, system assigns satellite path associated with second network transport modem for upstream / downstream transmission of packets classified as bulk traffic data type. Further, system estimates available capacity for upstream / downstream transmission of packets associated with first and / or second network transport modem. Furthermore, system adjusts rate limited priority queue for continuity of TCP connection corresponding to packets, responsive to change in network conditions of communication network during the upstream / downstream transmission.

A method for optimizing satellite signal performance in a satellite transmission system. The method includes: obtaining signal data from at least some of the plurality of customer receivers, measuring the signal data from each of the signal beams that were obtained; analyzing metadata from the components of the satellite transmission system, signal source front end controls, and spectral sampling; identifying signal degradation at one or more uplink antennas from the signal data of actual spot beam coverage using the measured signal data and the analyzed metadata; and predicting remediation actions to correct the signal degradation at the uplink antennas.

The invention provides a multi-point beam flexible coverage planning method. The method comprises the following steps: acquiring satellite longitude and latitude, a user number, a demand matrix, a beam width array and a number upper limit; converting the longitude and latitude of the user into uv coordinates and generating a coverage area; the beam width is traversed, the corresponding uv beam diameter is calculated, a coverage area is gridded to generate candidate beams, and an optimal combination is selected through a first round of optimization after no-user beams are removed; screening the optimal beam width and reprocessing the optimal beam width; multiple groups of non-dominated combinations are selected through a second round of multi-objective optimization; and visualizing a plurality of groups of non-dominated combinations and then selecting a final scheme. Therefore, automatic beam arrangement is realized, manpower is saved, the period is shortened, fine requirements are adapted, the capacity utilization rate is improved, multiple schemes can be generated for selection, and feasibility is ensured.

The present application relates to the technical field of communications, and discloses a communication method, a terminal, and a network side device. The communication method in embodiments of the present application comprises: a first terminal acquiring an association between a reference signal resource and a target object; and sending a first reference signal on the basis of the association between the reference signal resource and the target object, wherein the target object comprises an antenna reference point, a beam, or a time error group, and the association between the reference signal resource and the target object comprises different target objects being associated with different reference signal resources or different target objects being associated with different reference signal sequences in the same reference signal resource.

The present invention discloses a beam joint optimization method based on a RIS-assisted decellularized mMIMO system. Based on the characteristic of active RIS in amplifying signals, the present invention uses an active RIS-assisted downlink decellularized mMIMO system to enhance signal strength. Based on the data expression received by the downlink user, the downlink rate expression of the active RIS-assisted decellularized mMIMO system is given; then, considering the maximum power limit of the access point and the active RIS, an alternating solution algorithm is designed, including the use of quadratic transformation technology and dual gradient method, which solves the downlink and rate maximization optimization problem, and jointly optimizes the downlink access point beamforming sequence and the active RIS reflection beam. The present invention reduces the impact of multiplicative fading on the RIS-assisted channel, effectively solves the problem of inter-user interference and noise interference amplification caused by the use of active RIS, and improves system performance.

The invention discloses a low-orbit satellite positioning and tracking method for a high-dynamic object, and belongs to the technical field of low-orbit satellite communication, and the method comprises the steps: scanning any beam position; receiving a first feedback signal of the beam position, and determining a signal-to-noise ratio of a beam signal; when the signal-to-noise ratio is greater than a first preset signal-to-noise ratio, generating a plurality of sub-beam bits; receiving second feedback signals of a plurality of sub-beam positions, and determining a signal-to-noise ratio of the sub-beam signals; when the signal-to-noise ratio is greater than a second preset signal-to-noise ratio, repeating the steps until the coverage radius is reduced to preset precision; reading the position information of the coverage radius meeting the preset precision, wherein the position information is the position information of the moving object; inputting the position information into a preset prediction model to obtain a predicted spot beam position; and realizing data transmission between the satellite and the moving object by using the predicted spot beam position. According to the method, the user does not need to report the position of the user, cooperation of multiple satellites is not needed, complexity is reduced, and the method is simple and easy to implement.

The invention discloses a spot beam pattern generation system and a spot beam pattern generation method, and relates to the technical field of safety communication, the system comprises: a feed source and a radiation array element communicate through a target frequency obtained through random selection in the feed source, the feed source is used for receiving a microwave signal, and the microwave signal is transmitted to the radiation array element through the target frequency; the radiation array element is used for receiving a microwave signal sent by the feed source and radiating the microwave signal into a space to generate a spot beam directional diagram. According to the invention, the connection mode between the feed source and the radiation array elements is improved into a random selection and distribution mode, the feed signal of each radiation array element randomly and repeatedly selects a target frequency from the feed source array, and the microwave signal is transmitted to the radiation array elements through the randomly selected target frequency. And the radiation array element radiates the microwave signal to a space to generate a spot beam directional diagram. According to the random mode, decoupling of distance and orientation of the directional diagram can be achieved, and therefore the spot beam directional diagram can be generated.