57 results about "Rate adaptation" patented technology

The invention discloses a video data transmission method and system based on an FPGA, and relates to data transmission. The method comprises the steps that a video data stream is acquired, and a time sequence signal of the video data stream is analyzed; writing the parallel data into an external memory to form a frame buffer area; packaging the read video data into a data packet meeting a USB3.2 transmission protocol; packaging the data packet based on a USB3.2 link layer protocol; and converting the USB3.2 protocol transmission frame into a differential signal, and transmitting video data in the USB3.2 protocol transmission frame according to the differential signal. In view of data loss caused by mismatching of a video input rate and a USB output rate in the prior art, by establishing an annular buffer structure and adopting a dynamic pointer management and waterline threshold monitoring mechanism, rate adaptive matching of a video data stream is realized, and continuous and stable transmission of video data is ensured.

The invention provides a dual-CAN channel fusion J1939 protocol stack of a vehicle-mounted terminal and a parallel communication diagnosis method, and aims to solve the problems that an existing dual-CAN channel terminal lacks a protocol layer parallel processing mechanism and an intelligent routing strategy, communication and diagnosis conflicts still exist, and a J1939 protocol is insufficient in adaptation and poor in baud rate adaptation flexibility. The method comprises the following steps: S1, constructing a dual-CAN FD channel and dynamic baud rate adaptive detection mechanism, and providing a link basis for service isolation; s2, integrating J1939 and UDSonCAN dual protocol stacks based on dual CAN FD channels, and establishing data mapping to realize data collaboration between protocols; s3, designing an intelligent message routing and channel flow monitoring mechanism, and ensuring conflict-free parallel transmission of communication and diagnosis services; and S4, newly adding J1939 network management, configuration parameter persistence and firmware online upgrading functions, and improving the maintainability of the terminal. According to the invention, the advantages of dual-CAN channel hardware are fully exerted, efficient cooperation of communication and diagnosis and protocol deep compatibility are realized, and the compatibility, flexibility and stability of the terminal are greatly improved.

Methods and systems are described for performing multi-lane alignment and rate adaptation between tiles (1304, 1302) in a multi¬file package (1300), specifically exchanging alignment information (algn_found, rpcs_algn_ctl) across clock domains for different tiles (1304, 1302) based on a write tile clock (wr_tile_clk) generated from a local system clock (tx_clk) in a leader tile (1302), the write tile clock (wr_tile_clock) having a period equal to a common reference clock (refclk), the write tile clock (wr_tile_clock) corresponding to a pulse having a location within the period of the common reference clock (refclk) as determined by an active cycle of a counter.

The application discloses a modulation and coding adaptive selection method for a mobile ad hoc network based on separation of a control plane and a data plane. In the mobile ad hoc network based on separation of the control plane and the data plane, a carrier sense multiple access (CSMA) mechanism is adopted in a control time slot to compete for sending fused situation information of itself, so as to complete survey and perception of neighbor nodes. The situation information includes link transmission quality and node queue length. In the data plane, the CSMA mechanism is also adopted, but the situation information of the control plane needs to be utilized to form certain 'network order', so as to reduce the decline of throughput caused by error packets and collision. On the basis of a traditional rate adaptive algorithm based on a signal-to-noise ratio (SNR), the algorithm is improved and applied to a mobile ad hoc network device based on separation of the control plane and the data plane.

A wireless terminal of a telecommunications system comprises wireless terminal processor circuitry and wireless terminal interface circuitry. The wireless terminal processor circuitry is configured to generate a rate adaptation eligibility message to indicate whether a resource of the wireless terminal is eligible for codec rate adaptation. The wireless terminal interface circuitry is configured to transmit the rate adaptation eligibility message across a radio interface to a network node.

The invention relates to a code rate self-adaption method and device, computer equipment and a storage medium. The method comprises the following steps: aiming at a current suggested code rate output by a code rate prediction model, introducing a gating mechanism based on a buffer threshold, intercepting an unreasonable current suggested code rate so as to determine a target code rate conforming to a physical common sense, and carrying out code rate self-adaption according to the target code rate so as to obtain an adaptive code rate. Therefore, the jamming risk caused by the fact that the current suggested code rate output by the model is directly used for code rate switching is avoided.

The application provides a kind of multi-rate adaptive compatible coherent demodulation method and device, belong to coherent demodulation technical field;The method comprises: the pre-treatment of coherent light signal;Adopt the double-stage mechanism of coarse identification and fine identification combination to automatically identify the rate and modulation format of signal, wherein fine identification utilizes lightweight CNN classifier;According to the recognition result, adaptively configure the core demodulation parameters such as sampling rate, equalizer order, operation bit width and carrier recovery algorithm;Through the unified configurable modular architecture, complete synchronization, equalization, carrier recovery and other demodulation processing;Soft decision is made to demodulated signal and real-time monitoring performance index;According to the monitoring result, closed-loop dynamic fine tuning is carried out on demodulation parameter;The application realizes the automatic identification and compatible demodulation of 100G / 200G / 400G and PM-QPSK / PM-16QAM signal, and is suitable for general coherent acquisition platform, intelligent optical network receiver and multi-rate optical communication tester.

This electronic device comprises one or more processors comprising processing circuitry and a memory storing instructions. The instructions, when executed individually or collectively by the one or more processors, cause the electronic device to perform the operations of: transmitting a plurality of uplink data packets encoded by a codec on the basis of a first bit rate, during a first time duration; identify the number of first retransmission uplink data packets having a first retransmission count, which is greater than or equal to a first retransmission threshold value, from among the plurality of first uplink data packets; and adjust a bit rate of the codec from the first bit rate to a second bit rate, on the basis of the number of first retransmission uplink data packets.

The invention relates to the technical field of mine safety monitoring, in particular to a heterogeneous baud rate adaptive communication method for mine safety monitoring, which comprises the following steps: a monitoring substation sends a baud rate synchronization frame to all slave devices; the slave device receiving the Baud rate synchronization frame performs Baud rate switching according to the Baud rate synchronization frame; the monitoring substation sends inspection commands to all the slave devices according to the device cache table, if the slave devices receive the inspection commands, feedback signals are generated and sent to the monitoring substation, and the monitoring substation classifies all the slave devices according to the feedback signals and the device cache table; all the slave devices are divided into A and B types of slave devices; storing the slave devices A and B in an initial baud rate device list; and the monitoring substation performs baud rate self-adaption on the A-type slave devices under a plurality of communication baud rates, determines the optimal baud rate of each slave device, and moves from the initial baud rate device list to the corresponding optimal baud rate device list. The Baud rate can be independently and dynamically adjusted according to the actual communication condition of the equipment.

The invention discloses a high-speed data real-time acquisition system based on edge data and a Kafka transmission framework, and particularly relates to the technical field of data acquisition and processing, comprising: an edge node automatically identifies a device protocol and maps the device protocol to a unified namespace to generate a standardized data stream with a device identifier; adaptively adjusting a time window according to the change rate and recording a sequence number to form an event data frame; the event data frame is packaged into a context message, the context message is dynamically routed to a Kafka target partition according to a production stage label in combination with a partition load, and a dual-threshold local cache is synchronously adopted to resist link jitter; a consumer cluster subscribes to a target partition in parallel, after a complete window is compensated through a station bitmap and a frame-lacking mark, alignment is carried out in batches, comprehensive production records are generated, a relational database is filled in batches, and the data are pushed to a front end in real time, so that the problems of data frame loss and historical tracing breakpoint caused by complex adaptation of traditional centralized collection to multi-protocol equipment and link congestion are solved.

A device includes a receiver to receive a packet over a channel at a first frequency and generate a sampled stream of data at a first sample rate corresponding to the first frequency. A data resampler circuit includes a re-timer engine to determine, using a ratio between the first sample rate and a crystal oscillator (XO)-divided sample rate, re-timer values. The data resampler circuit includes a time shifting circuit to re-sample data values of the sampled stream of data associated with locations of the plurality of re-timer values. A correlation circuit uses the re-sampled data values, and the re-timer values to match an expected data pattern to a corresponding data pattern detected in a frame of the packet.

This invention provides a low-Earth orbit (LEO) satellite cross-layer reliability constraint system and method. The system includes a rate adaptive controller, which comprises a fine-grained rate adjustment module and a reliability constraint decision module working collaboratively. The fine-grained rate adjustment module achieves fine-grained continuous adjustment of the transmission rate by allocating non-uniform transmission probabilities to constellation symbols and dynamically adjusting the shaping entropy under a fixed basic modulation and coding format. The reliability constraint decision module is used to statistically model the physical layer decoding reliability and evaluate its statistical confidence level based on the cumulative distribution function of decoding success under different modulation and coding schemes. This invention achieves fine-grained continuous adjustment of the transmission rate through probabilistic shaping technology and introduces a reliability constraint mechanism based on decoding statistical characteristics, thereby improving the throughput and link stability of LEO satellite-to-ground communication under dynamic channels.

The present application relates to the technical field of data communication, in particular to a kind of reverse scattering network uplink and downlink rate adaptive method;Utilize the change of RSSI and phase value and the frequency modulation of channel occurrence carry out mobility detection;Channel estimation is completed based on filter-based channel detection and lossrate estimation;Rate adaptation is carried out to uplink and downlink;In the present application, RSSI value, the change of phase value and the frequency modulation of channel occurrence are used as detection trigger;The selection command in the protocol is introduced to design filter-based detection scheme, which avoids collision in MAC, reduces detection time and improves channel detection accuracy;According to the channel condition obtained by detection, rate adaptation is carried out to uplink and downlink, which greatly improves system throughput.

Various aspects of the present disclosure relate to rate adaptation for a QoS flow. In one aspect, a first network node obtains at least one of a measured UL rate and a measured DL rate for a QoS flow. The first network node determines whether to adapt at least one of a UL rate and a DL rate for the QoS flow based on at least one of the measured UL rate and the measured DL rate for the QoS flow. If the first network node determines to adapt at least one of the UL rate and the DL rate for the QoS flow, the first network node transmits, to a UE, at least one of a reduced or increased UL rate and a reduced or increased DL rate for the QoS flow.

The invention discloses a parallel stepped convolutional code space coupling coding and decoding (PSCBCC) method and device, belongs to the technical field of channel coding, and is suitable for a large-bandwidth communication scene. According to the method, a frame of data is divided into multiple groups of sub-data, parallel convolutional coding of three paths of input of current sub-data, interleaved previous sub-data and an interleaved previous check sequence is realized by utilizing a parallel coding unit, a current check sequence is generated, and the sub-data and the check sequence are respectively reserved to different subsequent moments to form asymmetric coupling; and during decoding, a parallel decoding unit is matched with a coding structure, and a plurality of groups of log-likelihood ratios are input to realize iterative updating. The throughput rate is improved through parallel processing, the bit error rate performance is enhanced through asymmetric coupling, multi-code-rate adaptation is supported, and the performance is superior to that of existing BCC and 4G / 5G standard codes.

Embodiments of the present disclosure relate to determining a data rate for an uplink transmission. In one aspect, a terminal device receives a message associated with a relative data rate for an uplink transmission from a network device, and the uplink transmission is to the network device. Based on the relative data rate, the terminal device determines a data rate for the uplink transmission. Based on the data rate, the terminal device performs data rate adaptation and the uplink transmission to the network device.

An electronic device and method using a rate-adaptive codec for dynamic point cloud compression are provided. The electronic device receives a point cloud frame (PCF) sequence including a reference PCF set and a current PCF to be encoded. The electronic device generates 3D feature data based on applying a neural network-based encoder to at least one of the reference PCF set and the current PCF. The electronic device selects an encoding path for the current PCF from an encoding pipeline as an I-frame encoding path or a P-frame encoding path. The selected encoding path can extend from an output of the neural network-based encoder and includes a first set of transformation operations that can be applied to the 3D feature data. The electronic device generates a bitstream of coded PCFs based on applying the first set of transformation operations to the 3D feature data.

The invention relates to the technical field of communication, in particular to an interface channel rate adaptation method and system and a computer program product, and the method comprises the steps: generating a token of a corresponding channel in a clock domain of each channel according to channel flow; synchronizing tokens of all channels to a main clock domain; and scheduling the flow of each channel in the main clock domain according to the token accumulation number of each channel to realize rate adaptation of all channels. According to the method, the token of the corresponding channel is generated in the clock domain of each channel based on the channel flow, the tokens of all the channels are synchronized to the main clock domain through the asynchronous fifo, the flow of each channel is scheduled in the main clock domain according to the accumulated number of the tokens of each channel, and rate adaptation of all the channels is achieved.

An example a first network entity for processing feature set data formed from media data includes a processing system comprising one or more processors implemented in circuitry, the processing system being configured to: determine a first set of processing tasks of a series of processing tasks to be performed on a set of media data, the first set of processing tasks corresponding to tasks to be performed by the first network entity, wherein a second set of processing tasks is to be performed by a second network entity; perform the first set of processing tasks on the set of media data to form a feature map; encode the feature map to form an encoded feature map; and send the encoded feature map to the second network entity to enable the second network entity to perform the second set of processing tasks using the feature map.

A communication method includes, when a rate adaptation or a frequency offset adjustment is performed on a first block sequence, a quantity of first preset blocks that are added or deleted is one of one or more preset values. In this way, a receive end may determine, based on whether the quantity of first preset blocks in the received first block sequence is a preset value, whether an exception occurs in the first preset block during transmission. Based on this, a false packet can be accepted as a correct packet less frequently, thereby improving a mean time to false packet acceptance (MTTFPA) indicator.

The embodiment of the invention discloses a sending rate adaptive adjustment method and device based on mail service provider feedback. The method comprises the following steps: adding automatfreqcontrol system parameters; receiving feedback information of the mail service provider; initializing a mail sending rate according to the system parameters and the feedback information; and performing rate adjustment based on a transmit queue management mechanism. The method has the following advantages: 1, the regulation rules are controlled through system parameters, and different speed regulation rules can be specified according to different letter receiving domain names; and 2, the self-adaptive adjustment of the mail sending rate is realized based on the feedback information of the mail service provider, and the system regularly adjusts the rate according to the sending condition, so that the manual participation is almost not needed. And 3, the sending rate is updated in time according to the feedback information, so that continuous retry or failure caused by speed limitation is avoided, the delivery rate and the sending stability of mail sending are improved, and the sending delay of the mail is also reduced due to timed speed increase.

The invention relates to a protocol conversion method and system for an Autbus and FC equipment, and the method comprises the steps: S1, receiving an FC message, and carrying out the priority marking and traffic shaping according to the priority and data type of the FC message; s2, analyzing the FC message, and extracting the data load of the FC message; s3, according to the Autbus protocol and the traffic shaping result, splitting and packaging the data load of the FC message to form a packaged Autbus message; s4, according to the priority identifier, adding the Autbus message into a corresponding cache queue; s5, based on a dynamic time slot resource allocation algorithm, allocating a time slot for the Autbus message, and transmitting the Autbus message through an Autbus bus; s6, an Autbus message is received, and decoding, verification and analysis are carried out on the Autbus message; s7, according to FC protocol recombination data, FC message recombination is carried out on the analyzed Autbus message; s8, performing end-to-end integrity verification on the recombined FC message; and S9, carrying out flow control and rate adaptation based on the FC equipment capability and the network condition, and then sending the recombined FC message.

Embodiments of the present disclosure relate to determining a data rate for an uplink transmission. In one aspect, a terminal device receives an indication of a congestion level of an uplink transmission from a network device, and the uplink transmission is to the network device. Based on the indication of the congestion level, the terminal device determines a data rate for the uplink transmission. Based on the data rate, the terminal device performs data rate adaptation and uplink transmission to the network device.

The technology of this application relates to a rate adaptation method and apparatus. The method includes, when a rate adaptation requirement exists, inserting a rate adaptation code block only between two adjacent code blocks whose code block relationship meets a preset condition, or deleting only a rate adaptation code block between two code blocks whose code block relationship meets a preset condition. In this way, it can be ensured that correctness of parsing a packet by a receive side after the receive side receives the packet is not affected by rate adaptation, and reliability of rate adaptation can be improved.

The application provides a baud rate self-adapting method, device and equipment. In the baud rate self-adapting method applied to a first communication unit, a level feature set corresponding to serial port data is obtained by collecting the level features of the serial port data sent by a second communication unit, and then the level feature set of the serial port data is matched with comparative level features. The baud rate corresponding to the comparative level features matched with the level feature set is determined as a to-be-verified baud rate, and the to-be-verified baud rate is externally verified to determine a target baud rate used for communication with the second communication unit. The baud rate self-adapting method provided by the application has strong adaptability, low memory requirement for the first communication unit, and can quickly and accurately determine the target baud rate used for communication with the second communication unit.

The application provides a low-orbit satellite rate adaptive method and system based on probability shaping, and the method comprises the following steps: acquiring a current channel quality parameter; calculating a quality parameter deviation relative to a preset reference point based on the current channel quality parameter; judging whether the quality parameter deviation exceeds a preset hysteresis threshold value, and making an update decision to obtain a target shaping factor; and adjusting a probability distribution of modulation constellation symbols according to the target shaping factor to realize rate adaptation. On the basis of fully exerting the continuous rate adjustment advantage of the probability constellation shaping technology, the application introduces a hysteresis interval lookup table mechanism to solve the technical defects of frequent shaping factor update and large control overhead in the existing point-by-point lookup table scheme.

This invention provides a multi-format, multi-rate adaptive blind demodulation method, terminal device, and storage medium, belonging to the field of space laser communication technology. The invention acquires a baseband IQ signal; performs spectral analysis on the signal to obtain power spectrum characteristic parameters and estimate the 3dB bandwidth; calculates whether effective spectral peaks appear based on the characteristic parameters in the power spectrum, thereby determining the modulation format of the signal and estimating the frequency offset, and finding the maximum spectral line in the envelope spectrum, the position of which is the symbol rate spectral line; based on the modulation format and symbol rate estimation, carrier synchronization, timing synchronization, and symbol decision are performed on the signal to complete the demodulation. This invention enables demodulation of received signals by analyzing the spectral characteristics of the signal to determine the modulation format and estimate the symbol rate when the signal modulation format and symbol rate are unknown. The technology of this invention does not involve complex algorithms and is easy to implement in hardware.

The embodiment of the application discloses a multi-user resource allocation method and device based on high-speed power line carrier (HPLC) communication, belongs to the technical field of power grid communication, and is based on orthogonal frequency division multiplexing (OFDM) for transmitting data in each time slot, and the channel state of each user in each OFDM symbol remains unchanged, and comprises the following steps: obtaining user service type information, wherein the user service type comprises a first service type and a second service type, and the first service type is different from the second service type; preferentially allocating resources to the first service type user; and after the resource allocation to the first service type user is completed, allocating the remaining resources to the second service type user. The application can maximize the total rate of the system, consider the consistency of rate adaptation and power adaptation in the system resource allocation, ensure the basic service quality of each user under the above various constraints, improve the transmission rate of the power line communication system, and reduce the complexity of resource allocation.

The application discloses a satellite data transmission system capable of automatically planning communication system switching scheme based on ground station information, relates to the technical field of spacecraft space-ground communication, and solves the problem that a single modulation mode and a fixed data transmission rate in a single ground station visible arc segment of a current space-ground data transmission system cannot meet the demand of large data volume downlink transmission. The GNSS module is used for calculating the on-orbit position of a satellite and sending the on-orbit position to an elevation angle calculation module; the module is combined with pre-stored geographical information of a ground station to obtain a real-time elevation angle through geometric calculation, and the real-time elevation angle is sent to a data transmission and storage module; the data transmission module is used for adaptively switching communication systems according to the elevation angle, and used for transmitting on-satellite payload data according to a new system; a measurement and control module is used for synchronously receiving ground command distribution and collecting on-satellite telemetry information to return to the ground, so that the data transmission rate of a low-orbit satellite is adaptively improved. The application is suitable for system design of satellite on-orbit data transmission to a ground station.

Disclosed in the present invention are a method and system for adaptively selecting a log output mode on the basis of a communication rate, and a device. The method comprises: reading input data of an SPI communication test tool, wherein the input data at least comprises SPI communication rate parameters; on the basis of the SPI communication rate parameters and a priority of log output mode selection, adaptively selecting matching log output modes; on the basis of an initialization state and a log output frequency in each log output mode, further screening the selected log output modes to determine a log output mode meeting user requirements; and receiving a requested instruction message from a client, and on the basis of parsed content of the instruction message, executing a corresponding operation. In the solution, a log output mode can be selected on the basis of parameters provided by a user when starting a test tool, and a log output mode can also be adaptively selected on the basis of an inter-system communication rate, such that a log output mode that is the most beneficial to testing can be flexibly selected, thereby preventing the problem of a log output mode failing to meet test requirements.