498 results about "Physical layer" patented technology

The invention relates to the technical field of laser, and provides a laser system with a controllable pulse state and a control method thereof. The control method of the laser system with the controllable pulse state comprises the steps that under the conditions that the cavity length of an FP cavity is in an initial fit state and the air pressure in the FP cavity is standard air pressure, a pump light source is controlled to adjust the pump power according to a first set; in response to the fact that the target pulse interval is smaller than the initial pulse interval, the pump light source is controlled to keep the target power unchanged, the air pressure of the FP cavity is adjusted to be within the preset range, and the cavity length of the FP cavity is adjusted through a second set; determining a target cavity length; controlling the laser to be output in a first pulse state; and controlling the laser to output in a second pulse state. According to the control method, the controllably generated abnormal wave form with the high peak power is introduced according to the preset frame structure to serve as a physical layer disturbance or random segment, and the reliability and safety of system signal transmission are improved under the condition that data segment transmission is not affected.

A modulation and coding scheme indication method and a corresponding apparatus in a wireless local area network system that supports one or more of a next-generation Wi-Fi protocol of IEEE 802.11ax (for example, 802.11be, Wi-Fi 7, or EHT), a next-generation Wi-Fi protocol of IEEE 802.11be (for example, 802.11bn, Wi-Fi 8, or UHR), Wi-Fi AI, a millimeter wave (mm Wave), an ultra wideband (UWB), and sensing (sensing). A method includes: generating a physical layer protocol data unit PPDU, where the PPDU includes a first field and a second field, the first field indicates a first modulation and coding scheme MCS group, and the second field indicates a number of spatial streams corresponding to one or more MCSs in the first MCS group; and sending the PPDU. This can reduce bit overheads.

A double-lane millimeter wave vehicle networking safety transmission method, system, device and medium based on STAR-RIS, the method comprising: constructing a STAR-RIS assisted double-lane millimeter wave vehicle networking communication scene; based on the propagation characteristics of millimeter wave signals, combining the channel fading characteristics under the conditions of line-of-sight and non-line-of-sight transmission and the transmission and reflection functions of STAR-RIS, calculating the channel gain of the cascaded channel of the STAR-RIS assisted link; based on the random geometry theory, respectively calculating the probability density functions of the associated distances of the direct link, the STAR-RIS reflection link and the STAR-RIS transmission link; constructing a dynamic link association strategy supporting ternary selection; establishing a signal-to-interference-and-noise ratio model under three association modes; combining the physical layer security performance index definition, calculating the closed-form analytical expressions of the connection interruption probability and the secrecy interruption probability, and verifying the security gain of STAR-RIS; the present application has the advantages of effectively overcoming the half-space coverage blind area of the traditional reflective RIS, and improving the link connection reliability and physical layer safety transmission performance under the double-lane complex shielding environment.

The present disclosure provides a measurement result reporting method and related equipment, and relates to the technical field of wireless communication. The method comprises the following steps: in response to the indication information of a related protocol entity on a first cell set and / or a second cell set, or the timeout of a timer, determining that a radio link failure is detected on the corresponding cell set, wherein the related protocol entity comprises at least one of the following: a physical layer entity, a medium access control layer (MAC) entity, a radio link control layer (RLC) entity, and a radio resource control layer (RRC) entity; and storing radio link failure information, wherein the radio link failure information comprises at least one of the following: height information, speed information, and beam measurement result information related to the height. The present disclosure can enable a terminal device to report measurement results carrying spatial information to a network side.

This invention discloses a high-performance communication transmission method based on 5G distributed antenna cooperative networking, specifically relating to the field of distributed antenna communication technology. It addresses the problems of existing distributed antenna systems relying on explicit control signaling for node scheduling, power allocation, and beam control, resulting in high signaling overhead, high scheduling delay, and low cooperative efficiency in high-speed mobile and complex channel environments. By mapping transmit power levels, energy storage unit voltage states, and beam pointing information to the amplitude, phase, and subcarrier distribution characteristics of the pilot sequence, multi-dimensional control information is implicitly carried at the physical layer. User equipment then analyzes the superimposed pilots to complete the selection of the dominant antenna node and beam pointing correction feedback. This allows each antenna node to perform cooperative transmission and adaptive adjustment based on the feedback results, thereby achieving efficient and stable distributed cooperative communication without the need for additional control signaling.

This invention relates to the field of Industrial Internet of Things (IIoT) technology, and in particular to a method and system for automatic identification and data acquisition of coal mine sensors. The method for automatic identification and data acquisition of coal mine sensors of this invention automatically discovers sensor devices in the network through a broadcast query protocol and a physical layer identification mechanism, parses their self-describing metadata, and generates device identification results and register read instruction sets. Through conflict detection and dynamic addressing algorithms, it automatically assigns and configures conflict-free Modbus slave addresses for the sensors. Based on the register read instruction set, it acquires data from the sensors and automatically verifies the acquired data based on the range and timing information in the self-describing metadata and the built-in multi-level verification mechanism to generate valid data. This constructs a multi-layered, intelligent data quality assurance system, significantly improving data reliability and greatly enhancing deployment and maintenance efficiency.

This invention discloses an underwater acoustic anti-interference transmission method and system based on sparse time-frequency feature mapping. The method includes: at the transmitting end, adaptively generating a fractional-order linear frequency-modulated waveform with a specific time-frequency shear slope based on the Doppler state of the underwater acoustic channel, achieving physical-layer focusing of transmitted energy; at the receiving end, constructing a hybrid observation model containing wide-block sparse channel components and narrow-block sparse burst noise components, and using a dual-channel variational Bayesian algorithm to jointly iteratively infer the posterior probability distribution of environmental burst noise in the fractional-order domain; finally, recovering the original signal through soft-threshold interference cancellation and fractional-order channel equalization. This invention effectively solves the communication failure problem caused by high-dynamic Doppler diffusion and marine biological impulse noise interference in underwater acoustics by actively mapping the waveform and using heterogeneous sparse joint inference at the receiving end, significantly improving transmission reliability in harsh underwater acoustic environments.

Techniques pertaining to global cyclic shift delay (CSD) index assignment for 60MHz distributed-tone resource unit (DRU) short training field (STF) transmission in wireless communications are described. An apparatus (e.g., a station (STA) ) performs a wireless communication by: (a) generating and transmitting a DRU of a physical-layer protocol data unit (PPDU) with tones of the DRU distributed on a 60MHz distribution bandwidth of an 80MHz frequency subblock of two or more frequency subblocks of a wider bandwidth; or (b) receiving and processing the DRU. In performing the wireless communication, the apparatus applies a global CSD on transmission of a STF for the DRU in the distribution bandwidth of 60MHz.

This invention discloses an integrated structure and method for data acquisition and transmission suitable for environments with strong electromagnetic interference, belonging to the field of high-speed data acquisition and communication technology. Addressing the problems of signal susceptibility to interference, low acquisition accuracy, and unstable transmission in complex electromagnetic environments such as nuclear fusion devices, a multi-level anti-interference data acquisition and transmission scheme is proposed. The structure includes an input impedance adaptive module, an isolation amplification module, a differential signal conversion module, an analog-to-digital conversion module, a digital signal processing module, an opto-isolation triggering module, and a fiber-optic-based 10 Gigabit Ethernet transmission module. Anti-interference is achieved at the analog front end through input impedance matching and isolation amplification; signal stability is improved through differential transmission and FPGA processing; and physical layer electromagnetic isolation is achieved using opto-isolation and fiber optic links. Furthermore, data packet verification and status reset mechanisms enhance data transmission reliability. This invention can achieve high-precision signal acquisition and high-speed stable transmission in strong electromagnetic environments, possessing excellent real-time performance and engineering application value.

The application discloses a physical layer key generation method and system based on Gray-CDF quantization and adaptive LDPC syndrome negotiation. The legal communication parties acquire channel characteristic sequences in reciprocal wireless channels, determine multi-level equal probability quantization thresholds according to empirical cumulative distribution functions of local channel characteristics, and adopt Gray codes to map adjacent quantization intervals into code words with only one different bit, so as to generate original key sequences; subsequently, LDPC syndrome lengths are adaptively determined according to current channel quality or initial bit inconsistency rate estimation values, the syndromes are disclosed through a public channel to complete key error correction, and retry or discard processing is performed on decoding failure frames; after successful negotiation, privacy amplification is performed according to disclosed leakage, and a consistent key is obtained. The application can improve original key generation rate, reduce negotiation disclosure, and improve the reliability of physical layer key generation and the available key rate.

This invention discloses a wireless sensing method, system, device, medium, and product, comprising: generating a wireless sensing frame by triggering a sensing function at a transmitting end and transmitting the wireless sensing frame to a receiving end via a data communication frame; the wireless sensing frame is a dedicated physical layer protocol data unit format, containing at least one orthogonal frequency division multiplexing (OFDM) symbol, and carrying a sensing reference signal pre-agreed upon by the transmitting and receiving ends on a predetermined proportion of available subcarriers on the OFDM symbol; and generating sensing data based on the wireless sensing frame upon receiving it at the receiving end. These technical features overcome the performance limitations of sensing algorithms.

The application provides a system delay scheduling method executed by an access point router, and an access point AP router. The method comprises monitoring a traffic state of a data packet, determining an average burst duration according to the traffic state, and comparing the average burst duration with a first time threshold and a second smaller time threshold. If the average burst duration exceeds the first time threshold, a second mode is selected; if the average burst duration is less than the second time threshold, a first mode is selected. In the first mode, a transmitter transmits the data packet through a first number of physical layer protocol data units PPDUs. In the second mode, the transmitter transmits the data packet through a second number of PPDUs after a delay time. The second number of PPDUs is less than the first number of PPDUs.

The present application relates to the technical field of energy storage, and particularly relates to an energy storage black start system and a control method thereof, the system comprising a physical layer, a coordination control layer and a network communication layer; the physical layer comprises at least one black start power module, at least one load control module and at least one grid synchronization module, the coordination control layer comprises a centralized system management unit and a local autonomous controller, and the network communication layer is a star-shaped heterogeneous redundant network based on a time-sensitive network, and is used for realizing data interaction between the coordination control layer and the physical layer. The present application avoids the whole black start failure caused by single point failure and the start interruption caused by the mismatch between the preset plan and the actual situation, improves the success rate of black start, guarantees continuous high-quality power supply to sensitive loads, enhances the robustness under incomplete or delayed communication, ensures the completion of cross-layer instruction transmission and state synchronization within milliseconds, and prolongs the service life of equipment.

The application discloses a dynamic bit and power loading method suitable for power line carrier communication, which comprises the following steps: a sending end and a receiving end train and prestore at least one subcarrier allocation table (SAT) set through channel detection; mode indication information of a Payload part is set in frame control information of a physical layer of the sending end, and when the mode indication information is in a dynamic loading mode, dynamic loading parameters required by the dynamic loading mode are determined; corresponding dynamic loading mode SAT_ID parameters are selected according to the dynamic loading parameters, and the corresponding SAT_ID parameters are configured in corresponding bit positions of the frame control information; after the corresponding SAT_ID parameters are configured, a load time domain waveform is generated according to the selected dynamic loading parameters from the subcarrier allocation table (SAT) set; the load time domain waveform, a preamble and a frame control time domain waveform are combined to form a complete physical layer data packet time domain waveform, and the complete physical layer data packet time domain waveform is transmitted to a power line channel for transmission.

This invention relates to the field of chip technology, and more particularly to a memory system based on the UBM protocol packaging, comprising a UBM device, a silicon interposer, and a GPU, wherein the GPU includes a UBM physical layer; the UBM device, silicon interposer, and UBM physical layer are interconnected based on a preset UBM physical interconnect protocol, where UBM is an ultra-high bandwidth memory, with a bandwidth higher than that of HBM4; the UBM physical interconnect protocol includes: the UBM device being connected to the silicon interposer using a hybrid bonding packaging method, the UBM physical layer being connected to the silicon interposer using a hybrid bonding packaging method, and the UBM device and the UBM physical layer establishing an interconnection through wiring resources in the silicon interposer. This invention improves the bandwidth line density and bandwidth areal density of the memory system packaging structure.

There is disclosed a method of operating a radio node in a wireless communication network. The method include transmitting signalling based on mapping bits to resource elements before performing modulation of the bits, the bits representing information to be transmitted. The disclosure also pertains to related devices and methods.

The application discloses a key default security information exchange method, system, device and medium based on physical layer network coding and block chain in Internet of Vehicles, and the method comprises the following steps: constructing a block chain network; registering an on-board unit (OBU); initiating a data exchange request; authenticating the OBU; and exchanging data. The system, device and medium are used for realizing the key default security information exchange method based on physical layer network coding and block chain in Internet of Vehicles. The block chain technology is applied to identity authentication of Internet of Vehicles, and the data exchange between OBUs is carried out by using physical layer network coding, so that the security and confidentiality are high, and the eavesdropping attack and privacy leakage can be prevented at the same time.

The present application relates to the technical field of wireless communication security, in particular to a radio frequency fingerprint identification method for wireless node identity authentication. The method solves the problems of weak radio frequency fingerprint characteristics in short frame wireless signals, insufficient discrimination ability of lightweight models, and difficulty in rigid alignment and distillation of heterogeneous teacher-student models. The method obtains training wireless signal samples with identity labels and converts them into time-frequency spectrum samples; inputs the time-frequency spectrum samples into a teacher recognition model and a student recognition model to obtain classification results and global features; projects the teacher global features and the student global features, generates a cross-dimensional correlation matrix according to the projection feature component correlation, and normalizes to obtain alignment-free attention weights; constructs an alignment-free feature distillation loss based on the weights, and jointly trains to obtain a lightweight radio frequency fingerprint identification model; the model is used to output the identity category of the wireless node to be verified during inference, which is used for wireless node access authentication and physical layer identity authentication.

A networking device and networking method for use in industrial automation applications. The networking device includes redundant circuitry that can allow the networking device to continue normal operation in the event of a failure that occurs with hardware of the networking device. The networking device includes both primary and secondary network switch circuits, and associated components. The networking device can be an advanced physical layer (APL) switch that interfaces with APL field devices.

The application provides a PCIe extension card-based hardware monitoring device and method, and relates to the technical field of hardware monitoring.The device comprises a PCIe communication interface for performing PCIe protocol communication with a host;an independent power supply unit for taking power through an auxiliary standby power supply interface and being isolated from the host side through a digital isolator;an isomorphic processing unit;multi-stage storage units for storing data in stages;a switchable network topology unit having a network physical layer interface and a topology switching circuit;the isomorphic processing unit receives host instructions, controls the working mode of the switchable network topology unit, and schedules the multi-stage storage units to perform testing and store the test results in stages.The application can solve the problem of monitoring failure and data loss caused by operating system crash or power failure in the prior art, continuously monitors and ensures data safety in abnormal system conditions, reduces testing cost, and improves the comprehensiveness of system stability verification.

The application relates to the technical field of surveying and mapping geographic information, and discloses a surveying and mapping intelligent analysis system based on multi-source data fusion, which comprises a multi-source acquisition and space-time reference alignment module, a factor graph consistency fusion and gate module and the like. The multi-source acquisition and space-time reference alignment module is configured to lock a main clock source through a hardware timing protocol, set a hard time alignment threshold, receive multi-source sensor data, judge a time synchronization deviation fed back by the sensor, and output original observation data flow when the time synchronization deviation is lower than the hard time alignment threshold. The factor graph consistency fusion and gate module is configured to receive the original observation data flow and build a global factor graph containing a full-source data constraint chain. The hardware timing protocol locking and hard time alignment threshold mechanism are adopted to establish a unified space-time reference at a physical level from the source, eliminate spatial misplacement caused by sensor sampling differences, realize high-precision consistency fusion of multi-source data, and solve the problems of difficulty in determining deviation sources and low fusion efficiency in traditional technologies.

The application discloses a network security device N+1 cluster hot backup system and method based on a chain type physical cascade, which comprises N main devices and at least one public backup machine, and each device is connected into a daisy chain topology through a special cascade interface. Each device is internally integrated with an encryption module and a physical switching matrix composed of multiple mechanical latching type optical switches. The system defines three modes of service processing, fault source bypass and transparent relay: when a device suddenly fails or is powered off, the optical switch automatically maintains the redirected optical path by relying on the mechanical latching characteristics, and physically bypasses the local port traffic to the cascade channel; after detecting the cascade signal, the downstream normal node directly establishes a straight-through transparent optical path by using the internal optical switch matrix, so that the fault traffic is relayed at the physical layer. The application realizes "physical layer complete unloading" of fault traffic, realizes zero computing power consumption for intermediate nodes, has a forwarding delay of less than 1 mu s, effectively eliminates the performance avalanche problem of a high computing power cluster, and has high availability of power failure self-healing.

A method and related apparatus for physical layer protocol data unit (PPDU) uplink bandwidth indication are provided. The method relates to the wireless communications field, for example, is applicable to a wireless local area network supporting the 802.11be standard. The method includes: An AP generates and sends a trigger frame. The trigger frame carries first indication information, where the first indication information is directly used to indicate or jointly indicate an EHT TB PPDU bandwidth or an uplink PPDU total transmission bandwidth. The trigger frame carries second indication information, where the second indication information is used to indicate distribution of an HE TB PPDU and / or an EHT TB PPDU in the uplink PPDU total transmission bandwidth, or directly indicate whether an EHT station transmits an HE TB PPDU or an EHT TB PPDU.

This invention discloses a dynamic radio frequency allocation method for ultra-large-scale MIMO (UML), relating to the field of wireless communication physical layer technology. First, the method proposes a novel concept of "water-filled driven effective degrees of freedom," which incorporates system transmit power and accurately characterizes the maximum number of sub-channels that can be effectively activated under a given power constraint. Second, a hybrid precoding optimization algorithm is designed to solve for the optimal precoding matrix under a given number of radio frequency links. Finally, based on the water-filled driven effective degrees of freedom evaluation and the hybrid precoding optimization algorithm, a dynamic radio frequency allocation scheme is constructed, dynamically activating and deactivating radio frequency links according to real-time channel conditions to adapt to channel changes. By introducing water-filled driven effective degrees of freedom and proposing a complete dynamic radio frequency allocation and precoding optimization process, this invention effectively improves the energy efficiency of UML systems, providing an innovative solution for promoting the development of green communication in UML.

A method for wireless communication, a transmitter, and a receiver are provided. The method includes the following. A transmitter transmits a first ultra-high reliability (UHR) enhanced long range (ELR) physical layer protocol data unit (PPDU). The first UHR ELR PPDU at least includes a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal (L-SIG) field, a repeated L-SIG (RL-SIG) field, a universal signal (U-SIG) field, a UHR-STF, a UHR-LTF, a data field, and a packet extension (PE) field, where the data field is transmitted at a granularity of a first frequency-domain resource unit with N times duplication in a bandwidth of the first UHR ELR PPDU, and N equals to 4.

The application provides a kind of core particle interconnection structure defect detection method based on physical level decomposition, comprising: obtaining the layout data and connection relationship data of through silicon via and micro-bump level;Form respective independent feature set according to physical space coordinates decomposition;Identify the vertical signal interruption feature of through silicon via and the poor contact feature of micro-bump;Establish physical connection topology graph, and the features existing spatial adjacent or electrical coupling relationship are connected after the above-mentioned features are labeled to generate correlation graph;Iterate the chain path, and mark the first defect feature node as defect source point;According to the level to which the source point belongs, select test signal injection and collect downstream response;Compare response with standard reference point by point, extract difference feature to determine the chain reaction extension range;Output the detection result containing defect level, position and influence range.The application can distinguish different physical level failure features and track chain reaction, realize the accurate identification of defect root and range.

The present application relates to the technical field of wireless charging, and particularly relates to a safety interlocking system for infrared laser long-distance wireless charging; through cooperation of spatial distribution of multiple photodiodes and hardware structure, when the light path is invaded by foreign matters, the control circuit can quickly cut off the high-power laser output, and the three-dimensional layout eliminates the spatial blind area of single-point detection, the polarization discrimination element in the transmitting end device and the phase delay element in the receiving end device are combined to construct an optical encryption closed loop, only the light received by the sensor after being inversely reflected to the receiving end rotatable polarization state is allowed, the in-phase polarized light reflected by ordinary mirror foreign matters is effectively blocked, the risk of mirror deception reflection attack in the high-power scene is greatly reduced, and through the pure hardware phase-locked loop frequency decoding circuit, only the reflected light output logic level carrying the preset modulation frequency is output, direct current and low-frequency interference of sunlight and illumination light sources are filtered from the physical layer.

This invention discloses a federated learning method and system for edge-aware networks aimed at refined urban and rural governance, belonging to the field of federated learning technology. The method includes: receiving local model update parameters, physical layer state metadata, and spatiotemporal context identifiers from multiple flexible electronic signs; calculating the effective data collection rate based on the physical layer state metadata, calculating the spatiotemporal consistency metric based on the spatiotemporal context identifier, and fusing them to generate spatiotemporal quality factors for each node; comparing the spatiotemporal quality factors with a preset quality threshold, and if the value is less than the threshold, using a historical reliable parameter library to perform weighted hybrid correction on the current update; calculating a comprehensive aggregation weight based on the local data sample size and spatiotemporal quality factors of each node, performing a weighted average to generate a new round of global model, and distributing it. This invention solves the performance degradation problem of federated learning caused by data intermittency in edge-aware networks by introducing spatiotemporal quality factors, combining historical knowledge completion, and dynamic weighted aggregation.

The embodiments of the present disclosure relate to a communication method, a communication device and a communication system. The communication method comprises: during coordinated beamforming (Co-BF) measurement established by a first AP, determining, on the basis of first channel state information, a first transmission power for transmitting a physical layer protocol data unit (PPDU) to a first station device (STA), wherein the first channel state information comprises measurement results obtained by the first STA after measuring a first null data packet (NDP) frame and a second NDP frame, the first NDP frame is transmitted by the first AP during the Co-BF measurement, the second NDP frame is transmitted by a second AP during the Co-BF measurement, the first AP is associated with the first STA, and the second AP participates in the Co-BF measurement and is associated with a second STA; and on the basis of the first transmission power, transmitting the PPDU to the first STA, wherein PPDU transmission between the first AP and the first STA and PPDU transmission between the second AP and the second STA are performed simultaneously. The embodiments of the present disclosure can provide a PPDU transmission method during Co-BF measurement.

This invention provides a method for receiving PPDU in a wireless communication system. [Solution] The terminal receives an EHT PPDU (Physical Layer Protocol Data Unit) from an AP (Access Point) that includes one or more EHT (Extremely High Throughput)-SIG (signal) content channels. Each of the one or more EHT-SIG content channels includes a common field containing at least one first resource unit (RU) assignment subfield and a user-specific field. The STA then identifies whether the common field further includes at least one second RU assignment subfield and can decode the PPDU based on whether the common field further includes at least one second RU assignment subfield.