102 results about "Path loss" patented technology

A terminal according to an aspect of the present disclosure includes: a receiving section that receives a cell switch command including information related to a target cell to be a candidate for serving cell switching; and a control section that controls path loss calculation, based on a measurement result of a reference signal before or after reception of the cell switch command.

The application discloses a wireless communication channel parameter measurement method and system, comprising the following steps: obtaining a sending signal based on a PN sequence of a wireless transmitting end; obtaining an influence of a channel impulse response based on the sending signal; performing convolution on the sending signal and the influence of the channel impulse response to obtain a receiving signal; obtaining autocorrelation outputs of different channels based on the receiving signal and the PN sequence; and obtaining path loss of the channel based on the autocorrelation outputs of the different channels. Compared with the traditional channel measurement activity using a special channel measurement instrument or a VNA, the device cost is greatly reduced, the manpower and material resources cost of the measurement activity is low, and a large amount of channel data can be obtained according to different experimental schemes.

This invention discloses a frequency conversion circuit, a wireless communication circuit, an apparatus, a system, and a method. The technical solution of this invention, through optimization and improvement of existing passive frequency conversion circuits, can further reduce costs. Furthermore, by directly feeding the broadband noise signal into the resonant unit from the second modulation port without other loss circuits, the path loss of the broadband noise signal can be reduced, thereby obtaining more oscillation signals. This allows more oscillation signals to be fed into the modulation element for mixing, ultimately resulting in more frequency conversion signals. In other words, with the same initial radio frequency signal power, the frequency conversion circuit can produce more frequency conversion signal power, correspondingly reducing the power consumption of the frequency conversion circuit and achieving a longer wireless operating distance.

Embodiments of the present disclosure disclose devices, methods and apparatuses for cell activation. In the embodiments, a terminal determines a pathloss-reference signal (PL-RS) as known for a secondary cell (SCell) with an uplink based on at least one measurement result or a measurement report. The measurement report is triggered due to a cell activation command. Then, the terminal device activates, based on the PL-RS determined as known, the SCell within a first time period. In this way, communication performance related to the carrier aggregation (CA) operations can be improved.

The application discloses a 6G distributed tri-polarization MIMO network parameter configuration method, and belongs to the technical field of wireless communication network optimization. The method unifies node deployment parameters, array structure parameters, tri-polarization port parameters and propagation mode parameters into the same candidate configuration and evaluation process; according to path loss, large-scale and small-scale propagation parameters, polarization impact, differential directional diagram response and near-far field propagation response, the overall network equivalent channel matrix corresponding to the candidate scheme is constructed; then, the candidate scheme is screened based on capacity, effective rank, condition number and received power, and a recommended network parameter configuration scheme is output. The method can coordinate the relationship between spatial deployment, polarization structure and propagation mode under the same framework, and improve the matching of the parameter configuration result and the actual propagation condition.

This application discloses a method, device, and medium for dynamic control of uplink power in a repeater, belonging to the field of communications. The method includes: determining the upper limit of the uplink transmit power of the repeater based on the downlink path loss between the repeater and the host base station, the uplink path loss, and the uplink reference sensitivity of the host base station; if the current uplink transmit power is greater than or equal to the upper limit, the current uplink transmit power is reduced by a first preset step size; if the current uplink transmit power is less than the upper limit, the current uplink transmit power is increased by a second preset step size; determining whether this power adjustment triggers a power increase in the user equipment; if so, the current uplink transmit power is increased by the second preset step size; if the current uplink transmit power meets a preset stability condition, the loop process is temporarily exited; otherwise, the main loop is returned to execution until the current uplink transmit power stabilizes. This method can achieve a balance between network-side interference suppression and user-side experience assurance.

This application belongs to the field of wireless communication technology and provides a general channel modeling method for communication of autonomous vehicles in underground spaces. The method includes: first, initializing model parameters and calculating path loss based on the scene; then, updating the orientation of the transceiver antennas using an attitude matrix and calculating their three-dimensional real-time positions; subsequently, selecting appropriate mechanisms to generate scattering clusters according to different underground scenarios such as pillar-type, tunnel-type, and cave-type, and updating their survival status based on the vehicle's motion state; next, generating and evolving specular multipath components and dense multipath components formed by specular reflection and diffuse scattering within each surviving scattering cluster; finally, combining line-of-sight and the two types of multipath components to calculate the time-varying channel impulse response and generate the channel matrix. This application can provide a more accurate and reliable general channel model foundation for the design, deployment, and performance evaluation of 6G underground communication systems, effectively supporting high-reliability communication assurance for underground autonomous vehicles.

A wireless communication device includes a communication element, non-transitory computer-readable storage media including instructions stored thereon, and at least one processor. The instructions, when executed by the at least one processor, cause the at least one processor to: transmit, by the communication element, a first signal; during a pre-defined time period following the transmission of the first signal, detect, by the communication element, a second signal; responsive to detecting the second signal, perform, during the pre-defined time period, a measurement; and determine path loss based on the measurement.

This invention discloses a communication method, apparatus, and system based on reconfigurable smart surfaces, belonging to the field of wireless communication technology. The communication method based on reconfigurable smart surfaces jointly optimizes the transmitter's current beamforming vector and current RIS reflection parameters based on real-time channel estimation results using a deep deterministic policy gradient algorithm. A joint optimization model of the transmitter's beamforming and RIS parameters is established, transforming the non-convex optimization problem into a Markov decision process, which is efficiently solved using the deep deterministic policy gradient algorithm, thereby improving the transmission capability of the communication. Furthermore, the introduction of reconfigurable smart surface technology, with its design featuring a reflection unit possessing independent amplitude-phase modulation capability, overcomes the fixed amplitude limitation of traditional passive RIS, effectively overcoming dual-fading path loss, and thus improving the anti-interference performance of the communication system in complex electromagnetic environments such as high spectral density and high interference power.

Techniques and apparatus for providing information to an AP within a wireless network are described. An example technique includes sending a first frame to a first wireless device, the first frame comprising a first control field indicating a first one or more parameters of the first frame, at least one parameter of the first one or more parameters is associated with a transmit power of the AP. Receiving a second frame from the first wireless device, the second frame is carried in a physical layer PPDU and comprises a second control field indicating a second one or more parameters of the first frame, at least one parameter of the second one or more parameters is associated with a pathloss determined based on the at least one parameter and a RSSI measured by the first wireless device. Extracting the pathloss reported in the second frame.

Provided in the embodiments of the present application is a method for determining a power control parameter, which method is applied to a terminal device. The method comprises: before applying a transmission configuration indication state (TCI state), sending a physical uplink shared channel (PUSCH) on a non-subband non-overlapping full duplex (SBFD) symbol and / or an SBFD symbol; on the basis of at least one of a first parameter preambleReceivedTargetPower, a second parameter msg3-DeltaPreamble and a third parameter deltaPreamble, determining a target received power for the PUSCH sent on the non-SBFD symbol, and on the basis of at least one of a fourth parameter preambleReceivedTargetPower-SBFD, a fifth parameter msg3-DeltaPreamble-SBFD and a sixth parameter deltaPreamble-SBFD, determining a target received power for the PUSCH sent on the SBFD symbol; and / or, on the basis of a seventh parameter msg3-Alpha, determining a path loss compensation factor for the PUSCH sent on the non-SBFD symbol, and on the basis of an eighth parameter msg3-Alpha-SBFD, determining a path loss compensation factor for the PUSCH sent on the SBFD symbol.

The embodiment of the invention provides a power control method and device, communication equipment, a chip and a computer readable storage medium, and the method comprises the steps that terminal equipment determines second path loss based on first path loss and first path loss offset; the first path loss is the path loss between the terminal equipment and first network equipment, and the second path loss is the path loss between the terminal equipment and second network equipment; and the terminal equipment determines the sending power of the terminal equipment to the second network equipment based on the second path loss.

A wireless device receives one or more messages including configuration parameters. For a configured uplink grant, the configuration parameters indicate a set of power control parameters. Transport blocks of the configured uplink grant are transmitted at a transmission power. In response to an activation command capable of updating a path loss reference signal for the uplink channel, the transmission power is determined based on the path loss reference signal mapped to the power control parameter set.

The invention discloses an information communication management system for rail vehicles, including a communication sub-network module for establishing sub-networks sharing the frequency domain resources of the wireless access network; a communication transmission rate module for calculating a communication transmission rate of users accessing the sub-network; a communication loss requirement module for defining signal transmission path loss and dynamic flow requirement of the rail vehicle; an allocation efficiency module for analyzing frequency domain resource allocation; an allocation optimization module for constructing a frequency domain resource allocation optimization function based on the frequency domain resource allocation efficiency of the wireless access network; and a resource allocation module for allocating frequency domain resources to each sub-network based on the frequency domain resource allocation optimization function and predict the optimal resource allocation state of the sub-network at the next moment through deep reinforcement learning.

An automatic-tuning method and an automatic-tuning system are provided. The automatic-tuning method includes: obtaining a first data rate and a first signal quality index of an object located at a coordinate point; controlling an attenuator to change a total path loss according to the first data rate and the first signal quality index to obtain a second signal quality index and a second data rate; determining whether to update a signal quality reference value and a coordinate reference value according to the second signal quality index and the second data rate, if so, the signal quality reference value and the coordinate reference value are updated with the second signal quality index and the coordinate point; and confirming whether the signal quality reference value is less than or equal to a preset signal quality threshold to determine whether to output the signal quality reference value and the coordinate reference value.

The invention discloses a method and a system for generating and executing an anti-interference flight strategy of a C2 link of an unmanned aerial vehicle, and particularly relates to the technical field of unmanned aerial vehicle communication. The method comprises the following steps: acquiring urban building material parameters and unmanned aerial vehicle flight parameters; based on the parameters, combining a free space path loss model, a Rice fading model and a blade peak diffraction model to construct an urban environment channel model; injecting same-frequency Wi-Fi interference and building reflection interference signals to calculate a signal to interference plus noise ratio; based on the signal to interference plus noise ratio, calculating the bit error rate and evaluating the anti-interference performance, and generating an anti-interference optimization scheme including frequency band switching and flight height adjustment; and controlling the unmanned aerial vehicle to execute the strategy. Aiming at the problems of Wi-Fi co-frequency interference, building shielding, glass curtain wall multipath reflection and the like in a complex urban environment, frequency band self-adaptive switching and flight height optimization are realized through multi-model joint simulation and dynamic strategy generation, the bit error rate is reduced, the anti-interference capability is improved, and the method has the advantages of being simple in structure and convenient to operate. And the communication reliability and the flight safety of the unmanned aerial vehicle in a complex urban environment are effectively guaranteed.

This invention discloses a medium-wave broadcast coverage simulation method based on medium-wave analysis technology, belonging to the field of signal propagation simulation technology. It addresses the problems of limited dimensions and lack of spatiotemporal dynamic characteristics in the assessment of propagation impact factors during medium-wave broadcasting under existing technologies. By constructing a simulation environment database and setting simulation datasets covering several spatial regions, medium-wave propagation analysis models for different time periods are established, and propagation paths for each time period are constructed. The simulation datasets are used as interference sources for simulation to obtain the propagation path loss of medium-wave broadcasting in any time period and spatial region. The propagation path loss of all spatial regions along the propagation path in the same time period is statistically analyzed. The propagation paths of different time periods in the same spatial region are superimposed to obtain the broadcast coverage intensity of each spatial region. The broadcast coverage intensity of all spatial regions is then labeled onto the entire simulation area to generate a broadcast coverage effect view characterizing the broadcast reception quality.

The present disclosure provides a power scheduling method, comprising: determining the simulation path loss of each different location UE according to the initial location, movement information and actual path loss of the different location UE at the initial location, and a preset attenuation coefficient; determining the unit actual power of each target channel of each different location UE according to a preset power configuration parameter, the simulation path loss, the actual path loss of each different location UE, and the unit maximum power of each target channel of each different location UE; determining the total scheduling power of all different location UEs according to the unit actual power of each target channel of each different location UE and the RB number of each target channel of each different location UE; and performing power scheduling on each different location UE according to the unit actual power of each target channel of each different location UE and the total scheduling power. The present disclosure also provides a power scheduling device, a readable medium and a computer product.

The terminal device applies the transmission configuration indication state and / or the path loss offset value to the physical channel and / or the physical signal, which can further improve the asymmetric transmission mechanism for the downlink transmission of a single network device and / or the uplink transmission of multiple network devices, thereby improving the uplink throughput and / or improving the uplink coverage.

The application discloses a vehicle-to-everything channel path loss prediction method, system, device and storage medium, wherein the method comprises the following steps: acquiring an RGB image, a depth image and laser radar point cloud data in front of a vehicle during driving of a plurality of vehicles; inputting the acquired data into a trained channel path loss prediction model to output a channel path loss prediction result; wherein the trained channel path loss prediction model is used for feature extraction on the laser radar point cloud data to obtain point cloud data features; feature extraction is performed on the depth image to obtain depth image features; feature extraction is performed on the RGB image to obtain RGB image features; feature fusion is performed on the obtained point cloud data features, depth image features and RGB image features to obtain fused features; and the fused features are predicted to output a channel path loss prediction value.

The application discloses a kind of optical fiber sensing systems based on quantum dot lifetime modulation characteristics, it is related to high-end equipment manufacturing technical field, the present application includes: excitation control module, for producing adjustable excitation signal, the intensity, frequency and pulse width of the excitation signal can be programmed setting according to actual application scene;Optical excitation module is connected with the excitation control module, receives excitation signal and generates corresponding wavelength excitation light, and the optical excitation module includes laser diode or light-emitting diode as light source.The advantage is that: through the sensing mechanism of quantum dot, the lifetime modulation characteristics of quantum dot material are used as the core sensing mechanism, compared with the traditional light intensity sensing mode, the light path loss and light source fluctuation have higher resistance.

This invention discloses a multi-terminal network audio broadcasting system, belonging to the field of audio broadcasting technology. It includes a central server and multiple distributed audio terminals. The central server comprises: a geographic information module for storing digital elevation models and the deployment locations of each audio terminal; an adaptive coding module for dynamically adjusting the redundancy coding rate of the audio stream based on link quality feedback reported by each audio terminal; and a routing calculation module for generating a multi-hop broadcast tree based on a terrain-compensated propagation loss model. Each audio terminal includes a positioning module for collecting its real-time geographic coordinates and reporting them to the central server. This invention achieves accurate path loss calculation, adaptive redundancy coding, dynamic power adjustment, intelligent broadcast tree construction, efficient packet loss recovery, and dynamic relay coverage, improving the coverage, stability, and energy efficiency of audio broadcasting.

The application discloses an antenna posture adjustment method, device, equipment, medium and program product; comprising: determining the path loss associated with the airborne antenna of the unmanned aerial vehicle; determining the signal transmission distance of the airborne antenna based on the path loss; determining the antenna elevation angle of the airborne antenna based on the signal transmission distance; determining the antenna posture based on the device posture of the unmanned aerial vehicle and the antenna elevation angle; and adjusting the posture of the airborne antenna based on the antenna posture. The scheme can automatically and intelligently adjust the posture of the airborne antenna, so that the posture of the airborne antenna can meet the emergency communication demand of signal propagation and coverage in the emergency communication scene.

The advent of fifth generation technology systems leads to seamless connectivity requirements for IoT-based applications. High frequencies of operation lead to inherent problem of path loss, and to mitigate designing of passive reflecting intelligent surfaces for practical operations are challenging. This disclosure relates a method to enable sectoral area coverage under network applications by topologically modulated reflecting intelligent surfaces. A Minkowski-shaped fractal unit cell is received as an input. The Minkowski-shaped fractal unit cell is characterized to obtain unit cell dimension with independent reflection-phase characteristics. The independent reflection-phase characteristics are utilized to identify distinct unit cell elements. Surface layouts are generated by the distinct unit cell elements. The surface layouts are characterized with respect to an incoming source radiation pattern to identify reflected radiation pattern parameters. The real-time sectoral signal coverage is designed based on the reflected radiation pattern parameters of the surface layouts and position of Ku-band horn antennas.

The present application relates to the technical field of evaporation waveguide path loss prediction, and discloses a kind of electromagnetic wave path loss time sequence prediction method under evaporation waveguide environment, comprising: obtaining the time series data of electromagnetic wave historical path loss, and inputting it into path loss prediction model;By bidirectional perception layer, the historical dependence relationship and future context information of time series data are captured using bidirectional long short-term memory network;By semantic alignment layer, non-causal information of future context information is filtered out using gated recurrent unit, and then causal alignment is carried out;Through attention reconstruction layer, the influence degree of each feature vector in the aligned feature sequence on electromagnetic wave signal fading is used to weight feature vector using self-attention mechanism;Through time sequence decoding layer, the time sequence logic of each feature vector in the weighted feature sequence is obtained using post-gated recurrent unit, to predict future path loss according to the weighted feature sequence and the time sequence logic of each feature vector therein.

This application discloses an automated adaptive calibration and compensation method for multi-band radio frequency links, belonging to the field of wireless communication testing technology. The method includes a link pre-calibration module, a scenario-based channel quantization module, a power closed-loop control module, and an interference robustness verification module. The link pre-calibration module completes the acquisition of full-band link attenuation curves and the construction of a frequency-loss mapping model, realizing dynamic closed-loop compensation of path loss. The scenario-based channel quantization module completes frequency sweep quantization of link loss under multiple typical channel scenarios, generating a scenario-matched compensation parameter set. The power closed-loop control module realizes dynamic constraint and protection of the link's linear operating area based on real-time power monitoring. The interference robustness verification module realizes quantitative evaluation of the link's anti-interference capability through programmable interference injection. This application can realize fully automated calibration and dynamic compensation of integrated multi-band radio frequency links, with a test accuracy of ±0.5dBm. It effectively solves the problems of multi-band test loss mismatch, high-frequency nonlinear distortion, and low compensation accuracy in complex scenarios in existing technologies, providing a high-precision and reproducible testing method for the performance evaluation of 6G integrated communication systems.

Methods and apparatuses for sidelink (SL) positioning power control in a wireless communication system. A method of operating a user equipment (UE) includes determining a power for a SL positioning reference signal (PRS) in a transmission occasion i based on PSL-PRS(i)=min(PCMAX,PMAX,CBR,min(PSL-PRS,D(i),PSL-PRS,SL(i))). PCMAX is a configured maximum output power of the UE. PMAX,CBR is related to a priority level of the SL PRS and a channel busy ratio (CBR) range for a CBR measured in slot i−N, where N is a congestion control processing time. PSL-PRS,D(i) is a component for downlink (DL) pathloss based power control for the SL PRS. PSL-PRS,SL(i) is a component for SL pathloss based power control for the SL PRS. The method further includes transmitting the SL PRS in the transmission occasion i with the power PSL-PRS(i).

A method performed by a wireless device or user equipment (UE) includes: receiving configuration and / or indication of Channel State Information Reference Signal (CSI-RS) or Tracking Reference Signal (TRS) resources from a network node; the method further includes receiving configuration and / or indication and / or scheduling of transmissions to a downlink (DL) channel or reference signal (RS), wherein the source reference signal (RS) for a quasi-co-location (QCL) assumption for the transmission of the DL channel or RS is the CSI-RS or TRS resource; or configuration and / or indication and / or scheduling of transmissions to an uplink (UL) channel or RS, wherein the reference for calculating or estimating path loss to calculate uplink (UL) transmit (Tx) power is the CSI-RS or TRS resource. The method further includes receiving one or more Transmission Configuration Indication States (TCI states) or QCL assumptions for updating the CSI-RS or TRS resources, or physical layer (PHY) signaling or media access control (MAC) signaling or higher-layer signaling that causes such updates. The method further includes applying the updated TCI state or QCL assumption to the CSI-RS or TRS resource or to resources in a CSI-RS or TRS resource set. The method also includes applying at least one of the determined or acquired values ​​after applying the TCI state or QCL assumption to the CSI-RS or TRS resource.

The present application relates to the field of intelligent control, in particular to a kind of wireless networking's yard lamp cluster intelligent control method and system, method includes: neighbor detection, signal strength is collected multiple times, eliminate anomaly and adaptively extend window to stabilize average intensity;Distance is estimated using path loss model of calibration or default parameter, and neighbor is divided into three levels of near, middle distance, long distance according to threshold value.Trigger response, trigger message carrying level label is received, coarse estimate relative azimuth is obtained using the strength difference table of orthogonal polarization double antenna, and brightness attenuation coefficient and guide correction delay are generated combining level difference and azimuth to make the minimum delay in front, exceed the maximum linkage order and do not light, drive luminaire according to parameter and smooth attenuation to long distance edge node boundary.The present application suppresses signal strength fluctuation, suppresses level stroboscopic, realizes direction perception using orthogonal polarization antenna, makes linkage diffusion direction and direction of travel consistent, and realizes smooth directional lighting.

A method and apparatus for layer 2 mobility is provided. Method for lower layer mobility includes transmitting the UECapabilityInformation to the base station, receiving a RRCReconfigruation from the base station, receiving a PDCCH order from the base station and determining the transmission power of the preamble and transmitting a preamble to the base station based on the PDCCH order. If the PDCCH order is a type1 PDCCH order, preamble transmission power is determined based on a first parameter set and pathloss of a first cell. If PDCCH order is a type2 PDCCH order, preamble transmission power is determined based on a second parameter set and a first information (CMG identifier) and a second information (transmission power related information) and pathloss of a second cell.