288 results about "Beam switching" patented technology

The invention discloses a dynamic beam adaptive optimization method for the Internet of Vehicles, and the method comprises the steps: firstly obtaining the current position, speed and driving direction of a vehicle, and carrying out the prediction of a future trajectory through combining historical trajectory information and employing a Kalman filtering technology and the like; and selecting a candidate beam direction from the predefined beam codebook. The system receives channel quality feedback information of a communication link in real time, and dynamically updates a beam forming weight based on an improved recursive least square algorithm. According to the algorithm, a composite adaptive adjustment mechanism of an error size and an error change trend is introduced, a multi-objective optimization function is constructed, and performance indexes such as link quality maximization, interference power minimization and beam switching frequency minimization are effectively balanced in a dynamic environment, so that an optimal beam direction is obtained. Finally, the real-time switching of the antenna array beams is realized through a low-overhead and low-delay control protocol. According to the method, track perception and a self-adaptive feedback mechanism are fused, and good real-time performance, stability and expandability are achieved.

A terminal according to one aspect of the present disclosure includes a control section that, if scheduling offset between reception of a downlink control channel for communication of downlink control information for scheduling an aperiodic channel state information-reference signal (A-CSI-RS) and reception of the A-CSI-RS is less than a threshold determined on the basis of a reported period value for beam switch, and there is a different downlink signal in the same symbol as the A-CSI-RS, and the A-CSI-RS and the different downlink signal are related to the same control resource set (CORESET) pool index, gives priority to quasi-co-location (QCL) for the different downlink signal; and a receiving section that receives the A-CSI-RS. According to one aspect of the present disclosure, collision between a plurality of channels / signals can be handled appropriately.

The invention discloses a multi-photon optical fiber array endoscopic imaging device and method based on hollow spiral scanning, and belongs to the technical field of biological imaging. The device comprises a laser collimation and beam expansion module, a pulse chirp module, a light beam switching module, an endoscopic detection module and a fluorescence acquisition module. The light beam switching module comprises an optical switch and an optical fiber array composed of at least two low-group-velocity dispersion single-mode optical fibers. The endoscopic detection module drives the optical fiber array to execute hollow spiral scanning through the resonance driver, the track starting point is not located at the view field original point, and central dense sampling is avoided. According to the method, the optical fibers are switched through the optical switch, so that the optical fibers execute spatial non-coincident hollow spiral scanning, multi-photon signals such as fluorescence, second harmonic and fluorescence lifetime are acquired, a central hole is complemented through image reconstruction and fusion, and a complete field imaging result is obtained. Light damage of the central area is remarkably reduced, the imaging resolution uniformity is improved, the fused image is true and reliable based on physical sampling, and the system stability is high.

Certain aspects of the present disclosure provide a method for wireless communications at a user equipment (UE). The UE transmits capability information corresponding to one or more antenna modules of the UE to a network entity. The capability information may include a quantity of boresight directions associated with each antenna module of the one or more antenna modules. The UE may receive from the network entity, after the capability information is transmitted, an indication of a beam switch and / or an antenna module switch. The beam switch indicates a switch from an active beam to a target beam. The antenna module switch indicates a switch from an active antenna module to a target antenna module.

Certain aspects of the present disclosure provide techniques for predictive tracking for antenna switching and beam switching in extended reality. A method for wireless communication by a user equipment (UE) includes collecting data using one or more sensors; predicting a future orientation and position of the UE based on the collected data; preparing a configuration of the UE for at least one of antenna switching or beam switching in response to the predicted future orientation and position of the UE; and performing the at least one of the antenna switching or beam switching, using the prepared configuration of the UE, in response to a detected current orientation and position of the UE.

The invention belongs to the technical field of satellite communication, and discloses a satellite communication beam switching method. The positions of a satellite and an aircraft are determined under a geocentric inertial coordinate system, an elevation angle is calculated, and visible wave beams are screened to form a neighbor cell list. And screening out a candidate beam list from the neighbor cell list based on the received power threshold. And if the list is not empty, constructing a decision matrix containing the receiving power, the signal-to-noise ratio, the number of available channels and the satellite residual service time for each candidate beam. And objectively calculating the weight of each performance index based on a matrix by using a CRITIC method. And by using the weight, a TOPSIS model based on Tanimoto similarity optimization is adopted to calculate the relative close degree of each candidate wave beam. And finally, selecting the candidate beam with the maximum relative closeness as the optimal beam to trigger switching. According to the method, through the objective weight and the optimization model, unnecessary frequent switching is reduced, and the communication stability and the system resource utilization rate are improved.

The invention discloses an uninterrupted phased array beam switching method, which relates to the field of satellite communication, and comprises the following steps: dividing a phased array antenna array plane into N independent phased array sub-arrays, arranging antenna array elements and transmitting and receiving component modules with the same number in each phased array sub-array, and configuring an independent control interface for each phased array sub-array; the wave control FPGA receives a wave beam pointing updating instruction from a satellite main control computer, analyzes a phase control value required by each phased array sub-array, and initializes a sub-array counter N to be equal to 1; and the wave control FPGA sends a phase control value to the transmitting and receiving assembly module of the Nth phased array sub-array through the Nth SPI interface, so that the Nth phased array sub-array enters a switching state, and a timer is started at the same time. According to the invention, the phased array is divided into a plurality of sub-arrays which are independently controlled, and a time-sharing switching strategy is adopted, so that the technical problem of a traditional overall switching mode in a high-speed transmission scene is effectively solved.

The invention discloses a portable multi-band unmanned aerial vehicle interference method and system based on a directional antenna array, and belongs to the field of unmanned aerial vehicle countering. The invention discloses a portable multi-band unmanned aerial vehicle interference method and system based on a directional antenna array. The method comprises the following steps: detecting and tracking a multi-sensor fused target; generating a multi-band interference signal; multi-band signal interference based on a directional antenna array; the system comprises a detection and tracking module, a signal generation and processing module, a directional interference array module, a main control and interaction module and an integrated platform and support module. The problems that in the prior art, a high-speed maneuvering unmanned aerial vehicle is difficult to track, and a modern unmanned aerial vehicle using multiple communication frequency bands at the same time cannot be effectively handled are solved. The method is high in interference efficiency and long in acting distance, wide effectiveness of unmanned aerial vehicles of different models and different communication configurations is guaranteed, multi-band coverage is achieved, the beam switching speed reaches the millisecond level through electronic beam forming, and the capacity of coping with complex targets is high.

The invention provides a communication method and a communication device for a wireless access network and a core network, and the method comprises the steps that terminal equipment can determine a first reference point list, the first reference point list comprises a plurality of points where beams are projected to the ground, and a second beam is determined based on the first reference point list and the motion direction of a first satellite. When the access beam is selected, the movement direction of the first satellite is considered, so that the problem of beam switching in the access process caused by satellite movement can be avoided, a broadcast beam with the largest beam coverage range in the movement direction is selected based on the reference points in the first reference point list, and smooth access is ensured.

The invention discloses a low-orbit satellite beam switching method and a communication terminal, and belongs to the technical field of satellite communication, and the method comprises the steps: synchronously collecting real-time multi-source data; preprocessing the real-time multi-source data to obtain a real-time multi-dimensional feature vector, and based on the real-time multi-dimensional feature vector, performing link quality prediction on links of all visible beams in a period of time in the future by adopting a prediction model to obtain an updated candidate beam set, and providing a time window for decision making; and constructing a comprehensive decision function fused with a multi-dimensional optimization target, calculating a comprehensive score of the updated candidate beam set, identifying a global optimal beam, and performing switching judgment and execution. According to the invention, the switching strategy conversion from passive response to active optimization is realized, the time delay and interruption probability of beam switching are obviously reduced, and the system resource utilization rate and the communication quality are improved.

The present application discloses a beam switching method for an intermediate node, applied to a wireless communication system. The wireless communication system includes a network device, an intermediate node apparatus, and user equipment. On a user node side, control information is received, wherein the control information includes a beam switching indication for the intermediate node; within a first threshold duration after receiving the control information, downlink control signaling and / or data are / is forwarded by using a beam controlled by an intermediate node before switching; and after a sum of the first threshold duration and a second threshold duration following receiving of the control information, the downlink control signaling and / or the data are / is forwarded by using a beam controlled by an intermediate node after switching. The present application further includes a device and system for implementing the method described. The present application solves a problem of loss of downlink control signaling and downlink data in a beam switching process of the intermediate node.

This communication device comprises: a control unit that, when a beam relating to a communication operation executed between a base station and a terminal by the communication device is switched to a first beam, sets a specific period before a first period in which the first beam is used, and switches said beam to the first beam; and a communication unit that transmits or receives a signal by using the first beam.

Apparatus and methods of span level TDM PDCCH transmission are disclosed. The apparatus includes: a receiver that receives a capability report from a device, wherein the capability report comprises Physical Downlink Control Channel (PDCCH) monitoring capability and / or beam switching capability of the device; a processor that generates PDCCH transmission parameters, based on the capability report, for transmitting a Downlink Control Information (DCI) with a plurality of PDCCH transmissions with span level repetitions; wherein the processor further configures, based on the PDCCH transmission parameters, a plurality of resources for transmitting the DCI, and a search space set for DCI detection in a PDCCH monitoring occasion set; and a transmitter that transmits the DCI in a plurality of DCI versions with the plurality of PDCCH transmissions using the plurality of resources.

The invention discloses an antenna beam switching method and device, electronic equipment and a computer readable storage medium. The efficiency and accuracy of antenna beam switching can be improved. The method comprises the steps of collecting current fingerprint information of a current antenna beam under the condition that the current antenna beam is detected to meet a switching condition; the fingerprint information is used for representing signal features of antenna beams and spatial physical features of the terminal; according to the current fingerprint information, matching is carried out in at least one pre-constructed fingerprint cluster, and a target fingerprint cluster is determined; the at least one fingerprint cluster is obtained by clustering historical fingerprint information of a historical beam switching event; the historical fingerprint information corresponds to a historical switching result; and executing antenna beam switching of the terminal according to a historical switching result corresponding to the historical fingerprint information in the target fingerprint cluster.

The invention relates to the technical field of satellite communication, in particular to a high-gain phased array receiving antenna system for low-orbit satellite communication, which comprises a radiation feed integration module, a beam phase mapping module, a digital beam forming module, a signal amplification module, a protection packaging module and a performance verification module. Stacking strip line feed networks and performing electromagnetic coupling to obtain an initial radiation channel; receiving and analyzing a beam control instruction through an embedded circuit, extracting a target beam pointing angle and mapping the target beam pointing angle into a phase offset; generating a digital phase control word according to the phase offset, and applying the digital phase control word to the radio frequency signal to complete phase calibration; a transistor with a low-noise amplification structure is used for enhancing the calibrated signal energy; the wave-transparent front cover covers the radiator, and the electromagnetic shielding rear cover wraps the internal components to form an assembly in a sealing manner; and verifying the gain and beam switching rate of the assembly in the typical frequency band of the low-orbit satellite. According to the invention, the low-orbit satellite communication signal receiving efficiency can be improved.

The invention relates to a wave beam control method for a Ka-band phased-array antenna and a related device, and the method comprises the steps: obtaining a target pointing instruction of at least one wave beam, and carrying out the parallel calculation of target weights needed by a plurality of receiving and transmitting assemblies in the phased-array antenna for the at least one wave beam based on the target pointing instruction; packaging the target weight into a control instruction and issuing the control instruction to a plurality of corresponding transceiving components; loading the target weights to respective storage units by the plurality of receiving and transmitting components; broadcasting a global synchronous trigger signal to the plurality of receiving and transmitting components after the plurality of receiving and transmitting components finish loading the target weights to the storage unit; and synchronously updating the working states of the plurality of receiving and transmitting components by using the target weight in the storage unit at the same moment when the plurality of receiving and transmitting components receive the global synchronous trigger signal. According to the invention, all the antenna units can be ensured to accurately and synchronously complete state updating at the same time, so that the instantaneity of a beam switching process and the stability of signals are ensured.

The invention relates to the technical field of intelligent sensors, in particular to an unmanned aerial vehicle track intelligent tracking method based on a millimeter-wave radar, which comprises the following steps: receiving echo signals collected by the front end of the millimeter-wave radar, carrying out constant false alarm rate detection and Doppler frequency shift extraction on the echo signals, generating an unmanned aerial vehicle target space coordinate set, and carrying out target tracking on the unmanned aerial vehicle. And mapping the target space coordinate set of the unmanned aerial vehicle to a three-dimensional Euclidean space. According to the method, a non-convex optimization objective function containing beam switching time cost and precision constraint is constructed, and mathematical optimal solution of radar beam resources is realized. The generated adaptive scheduling instruction is used for adjusting the pulse repetition frequency and the beam residence time, it is ensured that radar front-end parameters dynamically evolve along with the target state, overall centroid tracking is emphasized for rigid body formation so as to save resources, independent high-frequency refreshing is emphasized for discrete targets so as to ensure the precision, and the accuracy is improved. And the continuity and robustness of trajectory tracking of the unmanned aerial vehicle in a complex electromagnetic environment are improved.

Various aspects of the present disclosure generally relate to wireless communication. For example, a user equipment (UE) may determine a probability of each beam in an initial set of candidate beams being a target beam (for example, a best beam given current channel conditions) according to a current source beam and one or more parameters that relate to a propagation path from a transmitter to the UE. Accordingly, the UE may select, among the beams in the initial set of candidate beams, a set of candidate beams to measure in a beam management procedure according to the respective probabilities of each candidate beam being the target beam, which may reduce power consumption at the UE, reduce a beam selection or beam switching latency, and / or improve performance associated with beamformed communications.

Embodiments of the present disclosure relate to beam switching. An apparatus, method, and computer program are described comprising: receiving, at a user equipment, a downlink reference signal from a communication node of a mobile communication system, wherein the downlink reference signal is received by one of a plurality of beams of a receiver of the user equipment in accordance with a configured beam alignment; determining, based at least in part on a signal power of the received downlink reference signal, whether a beam switch is to be initiated to reconfigure the beam alignment at the receiver; and in the event that the beam switch is to be initiated, determining whether to initiate a communication node assisted beam switch or a non-communication node assisted beam switch.

This invention relates to beam switching following a Listen-After-Speak (LBT) procedure. Apparatus, methods, and systems for performing beam switching after an LBT procedure are disclosed. One apparatus (500) includes a processor (505) and a transceiver (525) operable on unlicensed spectrum, wherein the transceiver (525) supports multiple device panels. The processor (505) performs (805) a first Listen-After-Speak (“LBT”) procedure using omnidirectional sensing to obtain a first Channel Occupancy Time (“COT”), and in response to a successful LBT, performs (810) a first uplink transmission of a first Transport Block (“TB”) during the first COT and using a first device panel. Here, the first uplink transmission uses a first portion of the first COT. The processor (505) performs (815) a directed LBT procedure for a second device panel to obtain the remainder of the first COT.

In a wireless communication system, a user equipment (UE) may measure synchronization signal blocks (SSBs) to evaluate neighbor cells. A UE configured with multiple potential receive beams may conventionally measure one receive beam per SSB. A UE may improve the speed of receive beam measurements by performing measurements using demodulation reference signals (DMRS) of physical broadcast channel (PBCH) symbols, which occur twice per SSB. The UE may perform a cell search for neighbor cells available to the UE in a synchronized network to determine a number of the neighbor cells and timing information for each of the neighbor cells. The UE may measure one or more receive beams using the DMRs of the PBCHs of SSBs received from the neighbor cells. Each receive beam may be measured during a beam switch time unit including a PBCH symbol from each of the neighbor cells according to the timing information.

Some embodiments include a system, method, and computer program product for managing beam switching at a higher subcarrier spacing (SCS) at millimeter wavelength (mmWave) frequencies in a 5G wireless communications system. A user equipment (UE) transmits a beam switching gap (BSG) capability to a 5G Node B (gNB). The UE receives a transmission configuration indicator (TCI) state from the gNB, and performs a beam switch to the TCI state corresponding to a first beam. The UE can receive a first control resource set (CORESET) on the first beam and a second CORESET on a second beam where the BSG occurs between the first CORESET and a second CORESET. The UE can perform beam switching within the BSG from the first beam to a second beam, and receive the second CORESET on the second beam. The UE can determine and transmit modified candidate values of beam switching parameters to the gNB.

The invention discloses a timing advance (TA) determination method and device, electronic equipment, a storage medium and a computer program product. The method comprises the following steps: a first device receives a synchronization signal sent by a network device of a non-terrestrial network (NTN), the synchronization signal is used for downlink time sequence synchronization, the first device is deployed in a satellite in the NTN, and the satellite works in a transparent forwarding mode; determining a first moment based on the synchronization signal, the first moment being associated with beam switching of downlink transmission; and determining a feed link propagation delay corresponding to the first moment, and determining a TA corresponding to the first moment by using the feed link propagation delay, the TA being associated with beam switching of uplink transmission.

Methods and devices to facilitate user equipment (UE) -initiated, event-triggered beam management procedures for reducing overhead and / or latency are disclosed herein. The methods include signaling procedures and payloads for UE-initiated event driven beam reporting for fast beam switching. The methods further include a UE receiving a set of configurations for UE-initiated beam reporting (UIBR) using a Physical Uplink Control Channel (PUCCH) resource and performing UE-initiated beam measurements on the one or more measurement resources transmitted by the network, e.g., using different beams. The UE evaluates and determines if at least one event out of a set of events predefined for the UIBR procedures have occurred and transmits a report on the appropriate PUCCH resource to the network when one or more such events have occurred.

The application discloses a kind of distributed multi-curved surface array full airspace beam continuous control methods, comprising: setting satellite TT&C relay trigger event, trigger according to including satellite and TT&C station uplink and downlink state monitoring, orbit control instruction and pre-configured trigger instruction of switching condition;With satellite TT&C relay as the control core of random access node, utilize curved surface array tracking receiver state parameters and the partial satellite orbit information cached, based on TT&C relay trigger event, adaptively trigger curved surface array inter-beam switching process, ensure the continuous tracking of curved surface array to satellite.The present application can realize low-latency and low TT&C resource overhead distributed multi-curved surface array full airspace beam continuous control, support the low-latency TT&C relay demand of satellite in future large-scale constellation, realize on-demand switching without pre-planning, real-time capacity optimization, improve the adaptability to station network resources and the dynamic change of satellite motion state.

Procedures, methods, architectures, apparatuses, systems, devices, and computer program products for faster beam switching in a wireless network. A wireless transmit / receive unit (WTRU) may receive configuration information including QCL relation information for TCI states. The WTRU may receive beam switching information indicating a first replacement RS beam is associated with a first variable RS beam. The WTRU may determine measurements using the first source RS beam which is associated with a set of RS beams, including the first variable RS beam, as a QCL source for a TCI state according to the QCL relation information. The WTRU may determine measurements using the first replacement RS beam. The WTRU may send, in response to the beam switching information, information indicating that the TCI state is updated to be associated with the first replacement RS beam as the QCL source for the first set of variable RS beams based on the measurements.

The application discloses a kind of multi-photon fiber array endoscopic imaging device and method based on hollow spiral scanning, belong to biological imaging technical field.The device includes laser collimation and beam expansion module, pulse chirp module, beam switching module, endoscopic detection module and fluorescence acquisition module.The beam switching module contains optical switch and at least two low group velocity dispersion single-mode fiber array;Endoscopic detection module drives fiber array to perform hollow spiral scanning by resonant driver, its track starting point is not located at the origin of field of view, to avoid central dense sampling.The method switches fiber by optical switch, so that each fiber performs spatial non-overlapping hollow spiral scanning, collects multi-photon signals such as fluorescence, second harmonic and fluorescence lifetime, and completes the central cavity by image reconstruction and fusion, to obtain complete field of view imaging result.The application significantly reduces the central region light damage, improves the uniformity of imaging resolution, and the fused image is based on physical sampling to ensure authenticity and reliability, with high system stability.

A method and a device for transmitting / receiving a CSI-RS in a wireless communication system are disclosed. A method for receiving an aperiodic channel state information-reference signal (CSI-RS), according to one embodiment of the present disclosure, may comprise steps of: receiving, from a base station, downlink control information (DCI) for triggering the aperiodic CSI-RS; and receiving, from the base station, the aperiodic CSI-RS on the basis of the DCI, wherein, on the basis the scheduling offset of the aperiodic CSI-RS being smaller than the beam switch timing of a terminal, a quasi co-location (QCL) assumption of a downlink signal associated with the same CORESET pool index as the CORESET pool index of a control resource set (CORESET) for the DCI can be applied for the reception of the aperiodic CSI-RS.