13 results about "Packet segmentation" patented technology

The invention relates to the technical field of intelligent power grids, and provides a remote software upgrading method for an intelligent electric energy meter, which comprises the following steps: S1, a server generates an upgrading package containing a version identifier, and transmits the upgrading package to the intelligent electric energy meter in a fragmented manner through a TLS encryption channel; s2, the intelligent electric energy meter doubly verifies the integrity of the upgrade package and the legality of the source through an SHA-256 check code and a digital signature, the upgrade package and the source legality are written into a backup storage area of the Flash memory after verification is passed, and a CRC write-in check value is recorded; s3, performing secondary verification on the upgrade package of the backup storage area, triggering restarting after verification is passed, and writing data of the backup area into the main partition in the restarting process; s4, if the main partition system is not started or the core function is abnormal within the set time, returning to an old version and generating a fault log containing a timestamp; through a dynamic subpackage strategy, differential upgrading, SHA256 verification, a watchdog mechanism and a fault log record, the upgrading efficiency and safety of the intelligent electric energy meter are remarkably improved, and the dynamic subpackage strategy dynamically adjusts the size of a data packet according to the network condition.

This invention provides a method, device, and medium for segmenting network flow data packets, relating to the field of network flow data packet segmentation technology. The method includes: determining the communication type between terminal devices corresponding to target network flow data; segmenting the target network flow data using a preset fixed duration; obtaining the target task identifier corresponding to the target network flow data; segmenting the target network flow data using the segmentation duration corresponding to the task identifier in the segmentation duration mapping table that is the same as the target task identifier; if the target task identifier does not exist in the preset segmentation duration mapping table, then segmenting the target network flow data using a preset fixed duration to obtain several network flow data packets corresponding to the target network flow data. This invention can significantly improve the processing efficiency and resource utilization of subsequent data packet caching, transmission, disk storage, and analysis stages.

The invention discloses a control terminal used for controlling operation of a central air conditioning system. The control terminal is in communication connection with the server to carry out OTA upgrading; the control terminal is configured to execute the following steps during OTA upgrading: receiving an upgrading request issued by the server through the upgrading request point location; receiving a data packet from the server; the data packet is formed by segmenting the upgrading file by the server, and the data packet has a corresponding packet number; the received data packet is stored, and the receiving progress is reported through the upgrade progress point location; reporting a request for a data packet through the data request point location to indicate a packet number sent next time by the server; verifying an upgrading file formed by the stored data packets; after verification succeeds, OTA upgrading is executed; and after the OTA is upgraded, checking the running state, and when the running state is normal, reporting firmware parameters to the server. According to the invention, point location communication and subpackage upgrading modes are adopted, so that the calculation and storage burden of the control terminal is reduced.

The present disclosure relates to the technical field of communications, and relates to a data transmitting method and device, a communication system, and a communication device. The method comprises: a transmitting entity of a first protocol layer of a first device receiving a first data packet transmitted by a second protocol layer of the first device, wherein the second protocol layer is the layer above the first protocol layer; setting a sequence number (SN) field in a packet header of the first protocol layer to be a value of a first state variable; when a first condition is satisfied, segmenting a second data packet to obtain a plurality of data packet segments, wherein the second data packet is obtained by performing first processing on the first data packet, or the second data packet is the first data packet; and transmitting each data packet segment among the plurality of data packet segments to a third protocol layer, or when the first condition is not satisfied, transmitting the second data packet to the third protocol layer. The processes of transmitting and receiving data by the protocol layers are simplified, the functions of the PDCP and RLC layers are merged, and the processing complexity of a protocol stack is simplified, thereby effectively supporting the transmission of high-rate data.

Embodiments for transmitting uneven segments of a data packet over an intermediate communication link are disclosed. One embodiment includes receiving a data packet by a first node, segmenting the data packet into N segments, such that the size of each of the last two segments is shorter than the average size of the previous (N−2) segments, encoding the segments such that the reliability of each of the last two segments is better than the average reliability of the previous (N−2) segments, and transmitting the segments to a second node over the intermediate communication link. In this way, the most latency-sensitive segments are shortened and encoded with better reliability than the average segment, thereby improving network performance and efficiency.

This invention discloses an improved method for extracting gear fault diagnosis features by combining Complete Empirical Mode Decomposition (CEEMDAN) with wavelet packet segmentation threshold denoising and energy entropy. The reconstructed signal after CEEMDAN threshold denoising is re-CEEMDAN decomposed to obtain the energy values ​​of each modal component, which are then used as fault features of the gear. The method includes the following steps: 1) acquiring vibration signals in the X, Y, and Z mutually perpendicular directions at the gear of a rotating device using a vibration sensor; 2) performing CEEMDAN decomposition on the data to obtain multiple intrinsic modal components; 3) using the Pearson correlation coefficient method to divide the modal components into noise-dominant components and signal-dominant components; 4) applying different wavelet denoising methods to different dominant components; 5) reconstructing the signal and re-CEEMDAN decomposing it to extract the energy values ​​of each mode, which are then used as features under different fault states.

The invention provides a communication method, a communication device and a storage medium, and relates to the technical field of Internet of Things communication, and the communication method comprises the steps: receiving transmission indication information or re-triggering indication information sent by network equipment; wherein the transmission indication information is used for indicating retransmission of a target data packet, the re-triggering indication information is used for indicating transmission of a target service data packet, and the target data packet is a segmented data packet of the target service data packet; and sending the target data packet based on the transmission indication information, or sending the target service data packet based on the re-triggering indication information. In the implementation scheme, the A-IoT terminal equipment can send the corresponding service data packet or the service data packet segment based on the transmission indication information or the re-triggering indication information sent by the network equipment, so that the success rate of the A-IoT service process is improved.

The application provides a PCIe-based data transmission method, device and system. The method is executed at a device end. A plurality of ports of the device end are identified by a driver of a host end to match corresponding data buffers. The method comprises: segmenting a data packet into data packets; generating a descriptor by a descriptor generator according to the data packets; polling a channel corresponding to each port by the descriptor to detect the descriptor; transmitting the detected descriptor to be processed to a DMA controller to generate control information and send the control information to a data grabber and a data transmitter; reading the data packets from the corresponding channel by the data grabber and transmitting the data packets to the data transmitter; and transmitting the data packets to the data buffers of the host end by the data transmitter to process the data by the driver. The application can simplify the transmission process and reduce the data transmission delay.

The invention relates to a data sending method and device, a communication system and a communication device, and belongs to the technical field of communication. The method comprises: a sending entity of a first protocol layer of a first device receiving a first data packet sent by a second protocol layer of the first device, the second protocol layer being an upper layer of the first protocol layer; setting a serial number SN field in a packet header of the first protocol layer as a value of a first state variable; under the condition that the first condition is met, segmenting the second data packet to obtain a plurality of data packet segments; the second data packet is obtained by performing first processing on the first data packet, or the second data packet is the first data packet; and sending each data packet segment in the plurality of data packet segments to a third protocol layer when the first condition is satisfied, or sending the second data packet to the third protocol layer when the first condition is not satisfied. By simplifying the data sending and receiving process of the protocol layer, the functions of the PDCP layer and the RLC layer are combined, and the processing complexity of the protocol stack is simplified, so that the transmission of high-speed data is effectively supported.

The present application relates to the technical field of Internet of Things communications, and provides a communication method, a communication apparatus and a storage medium. The communication method comprises: receiving transmission indication information or retrigger indication information sent by a network device, the transmission indication information being used for indicating retransmission of a target data packet, the retrigger indication information being used for indicating transmission of a target service data packet, and the target data packet being a data packet segment of the target service data packet; and sending the target data packet on the basis of the transmission indication information, or sending the target service data packet on the basis of the retrigger indication information. In the described implementation solution, an A-IoT terminal device can send a corresponding service data packet or service data packet segment on the basis of transmission indication information or retrigger indication information sent by a network device, thereby improving the success rate of A-IoT service processes.

The invention discloses a reliable wireless communication method and device based on multiple relays, and the method comprises the following steps: S1, constructing a wireless communication model which comprises a source end transmitting node, a plurality of relay nodes and a target receiving node; step S2, based on the wireless communication model, constructing an end-to-end error probability minimization problem taking a data segmentation coefficient, a relay number and a two-hop transmission code length as optimization variables to obtain an optimization problem; and S3, solving the optimization problem, determining a data packet segmentation proportion and a two-hop code length distribution scheme, performing wireless communication configuration based on the distribution scheme, and performing wireless communication based on the wireless communication configuration. The method has the technical effect of high communication reliability.

The invention discloses a configuration file management method, system and device and a medium, and relates to the technical field of the Internet of Things, and the method comprises the steps that a management server obtains a corresponding configuration file operation instruction from a configuration file management platform in response to a task query request sent by user equipment; based on the equipment performance parameters of the user equipment, performing message segmentation processing on the configuration file operation instruction to generate an instruction sequence matched with the user equipment; the instruction sequence is sent to the user equipment, so that the user equipment controls a secure element to execute the instruction sequence, and an execution result is collected and returned to a management server; and sending the execution result to a configuration file management platform. Accurate adaptation of the configuration file operation instruction is achieved according to the performance difference of different user equipment, the problem of execution failure or resource overload caused by mismatching of the instruction message and the equipment processing capacity is avoided, and orderliness and accuracy of configuration file operation are guaranteed.

The present application relates to the technical field of data transmission. Provided are a data forwarding method and apparatus, and an electronic device and a storage medium. The method comprises: acquiring a data sub-packet obtained by means of data packet segmentation, wherein the data sub-packet comprises at least one data slice and forwarding information, the forwarding information comprises forwarding start point identity information, forwarding end point identity information and routing control information, the routing control information comprises a next output port of the data sub-packet, the data slice comprises position information of the data slice in the data sub-packet and data to be forwarded, and the position information comprises one of header information, tail information and intermediate information; opening a transmission channel of the next output port; and after the data slice comprising the tail information in the data sub-packet enters the transmission channel, closing the transmission channel. The forwarding method in the present application supports flexible data slicing, can be applied in large-scale chip scenarios with mixed forwarding requirements, and significantly increases the parallelism of the entire routing network, thereby improving the forwarding efficiency.