369 results about "Cyclic redundancy check" patented technology

The invention discloses an adaptive modulation anti-multipath unmanned aerial vehicle swarm communication method and system based on MIMO-OFDM, and relates to the technical field of wireless communication, and the method comprises the steps: receiving a down-conversion baseband; synchronization and compensation are carried out; removing a cyclic prefix and carrying out fast Fourier transform; estimating a channel and noise on the training and pilot frequency, and correcting a common phase; performing frequency domain equalization and soft decision, forward error correction and cyclic redundancy check according to the estimation to obtain a control parameter, decoding a payload according to the control parameter, and performing statistics to form a link quality indication; modulating coding, bandwidth and spatial mode, configuring mapping, power and weight, and packaging physical layer protocol data; carrier sensing conflict avoiding sending, confirmation and retry are adopted to generate media access statistics; and the routing selects the next-hop multi-hop forwarding according to the transmission quality, and performs end-to-end statistics and recharge. Through cooperation of hierarchical synchronization and phase correction with cyclic prefix and FFT, crosstalk is suppressed, channel noise scale optimization soft decision is robust, data decoupling is controlled, and end-to-end availability is improved through multi-hop self-healing recharge.

The invention discloses a high-speed camera data self-adaptive two-stage caching system and method and a storage medium, and relates to the technical field of machine vision high-speed imaging and high-speed data storage, a preprocessing unit is used for performing deserialization and parallel connection, ROI cutting and gain adjustment on collected item number data, and writing incremental FrameID and cyclic redundancy check codes into each frame; the DDR annular cache unit comprises a monitoring module, a decision module and an execution module; the decision module is used for calculating an instantaneous cache demand Cnew and a dynamic cache occupancy U; the execution module expands and shrinks an annular buffer space in a single shot through a DDR4 controller, and outputs a Hi / Lo mark in real time through an occupancy rate comparator to drive an NVMe queue manager. According to the invention, on the premise of zero extra burden in a normal working condition, millisecond-level automatic capacity expansion and high-speed flood discharge can be realized in a sudden working condition, and real-time frame-level integrity verification can be completed on a local FPGA (Field Programmable Gate Array) side. The patent is subsidized by national key research and development plans, and the project number is 2023YFF0719700.

The invention provides an FPGA program loading and updating method and system, and relates to the technical field of FPGA configuration management. The FPGA program loading and updating method comprises the following steps: S1, based on an RS422 physical layer protocol, adopting a self-adaptive block verification algorithm, acquiring a signal-to-noise ratio parameter in real time through a channel quality monitoring module, dynamically adjusting the size of a data packet, and implementing a double-buffer alternate receiving mechanism; and verifying each data block by using cyclic redundancy check and serial number continuity detection, discarding abnormal data packets with bit error rates exceeding the limit, and generating a data block set passing verification. Through combination of an adaptive block check algorithm and channel quality dynamic monitoring, real-time optimization and adjustment of the size of a data packet in a transmission process are realized, transmission requirements in different channel environments are effectively adapted, the data retransmission probability is reduced, and through cooperative application of a double-buffer alternate receiving mechanism, cyclic redundancy check and a serial number tracking technology, the transmission efficiency is improved. And continuity and integrity of data receiving are ensured.

The invention relates to the technical field of embedded data storage, and discloses a method and a system for prolonging the service life of a FLASH simulation EEPROM (Electrically Erasable Programmable Read-Only Memory) in a single chip microcomputer, and the method comprises the following steps: firstly, initializing the FLASH, dividing the FLASH into a main data area, a mapping table area, a backup area and a transaction log area, selecting a physical block through a dynamic wear leveling algorithm when data is written, and writing the data into a database; the method comprises the following steps of: starting a backup area or a transaction log area, safely updating a mapping table by using a transaction mechanism, performing cyclic redundancy check when reading data, if the cyclic redundancy check fails, starting cascade recovery from the backup area or the transaction log area, and finally, updating a transaction log to record operation so as to form a closed-loop management process. According to the invention, through a set of dynamic wear leveling and data classification management mechanism, global and uniform distribution of the write load in the storage array is realized, the physical block with the least erasing times is selected during writing, the access frequency of the data can be identified, and cold data which is not changed frequently can be actively migrated.

Apparatuses and methods for transmission and reception between a reader and an Internet of Things (IoT) device. A method includes receiving a physical reader-to-device channel (PRDCH) from the reader. The PRDCH includes a medium access control (MAC) header and a payload. The MAC header indicates (i) a type of reader-to-device (R2D) message and (ii) information related to determining a size of the payload. The MAC header and the payload are jointly attached with a single set of cyclic redundancy check (CRC) bits. The method further includes determining, based on reception of the PRDCH, a transmission of a physical device-to-reader channel (PDRCH) to the reader including determining a type of device-to-reader (D2R) message, a size of a payload of the D2R message, a length of the PDRCH transmission, and a transmission timing of the PDRCH. The method further includes transmitting the PDRCH to the reader.

The invention relates to the technical field of data processing, in particular to an FPGA (Field Programmable Gate Array) and CPU (Central Processing Unit) cooperative network data processing system, which comprises a network interface module for receiving and forwarding an external data flow, and a protocol analysis module for distinguishing a service message and a protocol message based on a message header characteristic and a load mode; the service processing module executes protocol format conversion, security encryption and data extraction in the FPGA; the protocol stack interaction module transmits a protocol message to the CPU through the MAC layer communication interface; the protocol stack module activates necessary protocol services in the CPU and generates a resource allocation instruction; and the data integration module receives the service data flow and the protocol processing result, and dynamically adjusts the encryption rule. According to the invention, FPGA business data closed-loop processing and CPU protocol service physical isolation are realized, a double-processing-unit architecture supports financial signature and industrial filtering cascade operation, the MAC layer interface is additionally provided with cyclic redundancy check to guarantee transmission reliability, and equipment processing efficiency and anti-attack capability under a fusion scene are improved.

The invention discloses a large file concurrent uploading method and system based on a dynamic fragmentation strategy and resource optimization, and the method comprises the steps: a client generates a file fingerprint according to the file size of a large file and metadata, and dynamically calculates the fragmentation size of the large file; the client carries out fragment cutting on the large file according to the calculated fragment size, establishes a concurrent uploading queue and uploads a plurality of fragments to a server side in parallel; the server selects an optimal storage node to store each fragment based on a consistent hash ring and a multi-dimensional weight model; the client side and the server side track a fragment uploading state through a fragment serial number and a cyclic redundancy check (CRC) value, and after all fragments are uploaded, integrity check and logic recombination are carried out; and when network interruption or uploading failure is detected, the client side and the server side execute an intelligent retry strategy or a splitting rescheduling strategy of breakpoint resume and failure fragmentation.

The embodiment of the invention relates to the technical field of data transmission security detection, and provides a data transmission detection method and device, electronic equipment and a medium, and the method comprises the steps: receiving target data which is transmitted by a transmitting end and carries a first check code, and obtaining the character length of the first check code; when the character length of the first check code does not meet the integral multiple of the parallelism degree of a cyclic redundancy check algorithm, a preset method is adopted to verify the first check code, and the preset method is a method for carrying out data frame tail zero padding and then backspacing on the first check code; and carrying out transmission anomaly detection on the target data based on a verification result of the first check code. Therefore, processing delay is greatly reduced, resource occupation and power consumption are reduced, and cost is reduced.

A method of wireless communication comprises receiving downlink control information by a user equipment in an inactive state. The downlink control information comprises a cyclic redundancy check scrambled by a radio network with at least one base-station with paging-Radio Network Temporary Identifier. The user equipment monitors paging message in inactive state and uses paging-Radio Network Temporary Identifier to decode reception of paging message, wherein the user equipment receives indication of small data transmission and identifier from radio network with at least one base-station.

This disclosure describes systems, methods, and devices related to enhanced duplex communication. A device may receive an indication for PRACH resources for subband non-overlapping full duplex (SBFD) operationin downlink control information with a Cyclic Redundancy Check (CRC). The device may determine a physical random access channel (PRACH) occasion based on the indication for PRACH resources for SBFD operation. The device may transmit a PRACH preamble on the determined PRACH occasion.

A method according to one embodiment of the present specification comprises the steps of: generating a signal on the basis of a cyclic redundancy check (CRC); and transmitting the signal. The plurality of chips related to the signal include i) chips related to the CRC and ii) one or more chips related to padding.

Wireless communication is performed by: receiving downlink control information including by a user equipment in an inactive state, a cyclic redundancy check scrambled by a radio network with at least one base-station with identifier that is specific to a group of UEs, the group of UEs including the UE, and a resource assignment for a data transmission from at least a base-station to the user equipment; and receiving, by the user equipment in the inactive state, the data transmission on a physical shared channel, wherein the user equipment receives indication from radio network with at least one base-station, whether the radio network with at least one base-station has one shot downlink data transmission or multiple shot data transmission.

An apparatus may receive T copies of data that includes a cyclic redundancy check (CRC). T is an even number greater than or equal to 4. The apparatus may determine a first set of bit positions, at each of which T / 2 copies of the data have a same first bit value different from a same second bit value of the other T / 2 copies of the data, determine a second set of bit positions, at each of which more than T / 2 copies of the data have a same bit value different from a bit value at a corresponding bit position of the first copy, and correct, using the first set of bit positions and the second set of bit positions, an error contained in the first copy.

An apparatus may receive a first copy, a second copy and a third copy of data including a cyclic redundancy check (CRC) code, determine that a number of one or more bit positions, at each of which at least two of the first copy, the second copy or the third copy have bit values different from each other, is greater than a threshold value, divide the one or more bit positions into a first set of bit positions corresponding to the threshold value and remaining bit positions, determine, among the remaining bit positions, a second set of bit positions at each of which both the second copy and the third copy have a same bit value different from a bit value at a corresponding bit position of the first copy, and correct, using the second set of bit positions, an error in the first copy.

Embodiments of the present application provide a wireless communication method and a wireless communication device. The wireless communication method is executed by a reader / writer and comprises: sending information; and on the basis of a predefined rule, determining whether to add a cyclic redundancy check (CRC) code to the information. The information is first information, the first information comprises paging-like information and / or device selection information, and the paging-like information is used for selecting a device to be inventoried or classifying the device.

The invention discloses a data protection system for a PCIe (Peripheral Component Interconnect Express) switch. The data protection system comprises a CRC (Cyclic Redundancy Check) module, a data verification module and an error monitoring management module, wherein the CRC verification module is in communication connection with a non-transparent bridge port, and / or an upstream port, and / or a downstream port of the PCIe switch and is used for carrying out CRC verification on data received and sent by the ports, and the data verification module is in communication connection with an internal bus of the PCIe switch and is used for verifying a data packet transmitted on the internal bus and sending the verified data packet to the PCIe switch. And the error monitoring management module is in communication connection with the verification module, and is used for monitoring the data packets sent and received by the ports to identify illegal packets, recording the number and types of the illegal packets, and feeding back according to the types of the illegal packets. The data protection system can be used for a non-transparent bridge port and the like of a PCIe (Peripheral Component Interconnect Express) switch, performs data protection on the whole transmission process of a data stream, ensures the integrity of the data, and improves the reliability.

The invention provides a 2M non-framing double-path protection intelligent switching method and system based on redundancy check, and relates to the technical field of communication, and the method comprises the steps: obtaining double-path 2M non-framing code streams, carrying out the alignment processing, generating a check result through employing cyclic redundancy check, carrying out the statistics of error code feature vectors in a sliding time window, and constructing a link quality track. According to the method, the quality degradation early warning signal is extracted, the stage switching strategy is constructed based on the early warning signal, the switching time sequence is determined in combination with the neural network evaluator, link switching is executed, self-adaptive optimization of the switching strategy is achieved, and the intelligence and reliability of link switching are improved.

An internet of things (IoT) non-terrestrial network (NTN) device user equipment (UE) is described. The UE includes receiving circuitry configured to receive narrowband physical random access channel (NPRACH) configurations including NPRACH resource configuration, repetition parameters, orthogonal cover code (OCC) multiplexing methods and OCC multiplexing factors. The receiving circuitry is also configured to receive a narrowband physical downlink control channel (NPDCCH) downlink control information (DCI) format N1 and cyclic redundancy check (CRC) scrambled by a random access-radio network temporary identifier (RA-RNTI) for random access response (RAR) in an RA response window. The receiving circuitry is also configured to determine an OCC index indicated in the NPDCCH or the RAR, and compare the determined OCC index with a selected OCC index. Transmitting circuitry is configured to select an NPRACH resource, randomly select an OCC index for an OCC multiplexing and transmit NPRACH preambles.

In some implementations, an apparatus may receive a first copy of payload data and a corresponding first cyclic redundancy check (CRC) code, and a second copy of the payload data and a corresponding second CRC code. Each of the first copy and the second copy may be encrypted with an identical keystream. The apparatus may decrypt, using the keystream, the first copy to obtain first decrypted data and the second copy to obtain second decrypted data, append the first CRC code to the first decrypted data to form first data, append the second CRC code to the second decrypted data to form second data, determine one or more bit positions, at each of which the first data and the second data have bit values different from each other, and correct, based on the one or more bit positions, an error contained in the first data.

A data transmission (including receiving and sending) method is disclosed. According to the data transmission method, a terminal device receives downlink control information (DCI), where cyclic redundancy check (CRC) of the DCI is scrambled by using a first RNTI, the DCI is used to schedule a first downlink data channel, and the first downlink data channel is scrambled by using a second RNTI; and the terminal device receives the first downlink data channel based on the DCI. The DCI includes a DAI domain and / or an FDRA domain. The DAI domain indicates a count of first HARQ-ACK information in a first HARQ-ACK codebook, and the first HARQ-ACK codebook corresponds to the first RNTI. The FDRA domain indicates, within a frequency domain range of a public frequency resource, a scheduled frequency domain resource on the first downlink data channel.

To provide a communication device capable of suppressing reception of erroneous data.SOLUTION: A communication device includes a control unit that interprets a CyclicRedundancyCheck (CRC) field and an acknowledgement (ACK) field in information data of a DigitalEnhancedCordlessTelecommunications (DECT) system as an information data CRC field in the information data, and a radio unit that transmits and receives a radio signal including the information data and information data CRC in the information data CRC field.SELECTED DRAWING: Figure 9

The invention discloses a verification device and a verification method for a background mechanism cyclic redundancy check algorithm, and relates to the technical field of integrated circuit verification, a formalized verification automatic exhaustion input state space is introduced, calculation results of a hardware design RTL and a software golden reference model are compared, and a difference report is formed; performing simulation verification on the basis of formalized verification, constructing a competition scene of the master end and the background CRC calculation module which are located at the same communication level as the background CRC calculation module relative to slave end equipment, executing simulation verification, crosswise covering different master end function combinations, and finding whether a verification error exists or not through monitoring interruption; the comprehensive verification of the background mechanism, the calculation and the error notification function of the verification object is realized in the process from initiating the memory access to loading the memory data to outputting the data verification result. And finally, packaging the formalized verification and the simulation verification into a regression task which can be executed through parameter transmission through regression management, and converting the verification into a reliable operation automation scheme.

An apparatus may receive a first copy, a second copy and a third copy of data including a cyclic redundancy check (CRC) code, determine a set of bit positions, at each of which at least two of the first copy, the second copy or the third copy have bit values different from each other, perform a bit flip on the first copy at one or more bit positions to generate second data, calculate a number of operations for calculating respective sums of CRC syndromes corresponding to a plurality of sets of one bit position, two bit positions or three bit positions, among the set of bit positions, determine that the number of operations does not exceed a threshold, and correct, based on flipped bit positions among the set of bit positions in the second data and the respective sums of CRC syndromes, an error contained in the first copy.

A method of wireless communication comprising receiving downlink control information comprising by a user equipment in an inactive state, a cyclic redundancy check scrambled by a radio network with at least one base-station with paging-Radio Network Temporary Identifier. The user equipment monitors paging message in inactive state and uses paging-Radio Network Temporary Identifier to decode reception of paging message, wherein the user equipment receives indication of small data transmission and identifier from radio network with at least one base-station.

Certain aspects of the present disclosure provide techniques for providing feedback from a backscatter device, such as an ambient internet of things (IoT) device, based on a forward link transmission. In one example, a method of wireless communications by an ambient internet of things (IoT) apparatus, includes receiving a multicast forward link communication comprising one or more cyclic redundancy check (CRC) bits associated with a transport block portion of the multicast forward link communication; and performing one of sending a negative acknowledgement, or not sending an acknowledgement, via a backward link in response to determining whether each of one or more check values determined based on the multicast forward link communication matches a corresponding CRC bit of the one or more CRC bits.

An apparatus may include one or more processors and a receiver configured to receive first audio data having one or more gain spikes and retransmission of a first copy of the first audio data. The one or more processors may determine a first set of bit positions each having a sensitivity value higher than a threshold value, the sensitivity value indicating a degree of sensitivity of audio quality to bit errors at each bit position, determine that a second set of bit positions, at each of which the first audio data and the first copy have bit values different from each other, include at least one of the first set of bit positions, and modify the first audio data to eliminate a gain spike corresponding to the at least one of the first set of bit positions.

The invention provides an 802.11 be multi-user system receiver signal-to-noise ratio estimation method, device and equipment and a medium, and the method does not only depend on a limited number of pilot frequency subcarriers in a frequency resource unit where a target user is located any more, but analyzes and verifies an EHT-SIG field to estimate the signal-to-noise ratio of the target user. And a plurality of frequency resource units whose cyclic redundancy check results are verified to be correct are screened out, and all pilot frequency subcarriers contained in the reliable frequency resource units are combined to be jointly used for estimation. According to the method, a plurality of cyclic redundancy check results are combined to check all reliable pilot frequency subcarriers in a correct frequency resource unit to estimate the signal-to-noise ratio, so that the sample cardinal number of noise power estimation is remarkably increased; the problem of low estimation precision caused by too few pilot frequency subcarriers of a single user due to dynamic allocation in an 802.11 be multi-user system is effectively solved, so that the overall accuracy of signal-to-noise ratio estimation is improved.

A management system may receive a wireless signal transmitted to a receiver. The management system may determine, based on the wireless signal or a set of decoded bits associated with the wireless signal that were determined using an artificial intelligence (AI) receiver module of the receiver, whether a cyclic redundancy check (CRC) associated with the wireless signal is passed. The management system may perform, based on determining whether the CRC associated with the wireless signal is passed, at least one of: a data storage operation associated with the wireless signal, a fallback operation associated with the wireless signal, or an online label recovery operation associated with the wireless signal. The management system may perform, based on determining whether the CRC associated with the wireless signal is passed, a model modification operation to update a neural network (NN) of the AI receiver module of the receiver.

A method and apparatus for performing sidelink communications in a wireless transmit receive unit (WTRU) using Long Term Evolution (LTE) and New Radio (NR) technologies is described herein. A WTRU receives a downlink control information (DCI) on a physical downlink control channel (PDCCH) transmission from a base station, where the DCI is associated with a cyclic redundancy check (CRC) that is scrambled using a radio network temporary identifier (RNTI). The WTRU determines that the DCI indicates resources for a LTE sidelink transmission when the CRC is scrambled using a sidelink semi-persistent scheduling V-RNTI, and determines the DCI indicates resources for a new radio (NR) sidelink transmission when the CRC is scrambled using a sidelink (SL)-RNTI. The WTRU transmits SL data using the resources indicated by the determined DCI. Additional embodiments are disclosed.

This application provides an encoding method, a decoding method, and a communication device, relating to the field of wireless communication technology, to provide an encoding and decoding scheme that improves encoding and decoding efficiency. The first communication device in this application determines cyclic redundancy check (CRC) bits based on the number of information bits included in the information sequence; the first communication device adds CRC bits to the information sequence to obtain a sequence to be encoded; the first communication device performs RM encoding on the sequence to be encoded to obtain a codeword sequence. The first communication device performs RM encoding on the sequence to be encoded with added CRC bits, thus allowing verification based on the CRC bits during the decoding process to ensure decoding accuracy; after the decoding result is verified to be correct based on the CRC bits, decoding can be stopped, thereby shortening the decoding process and improving decoding efficiency.