1199 results about "Retransmission" patented technology

The embodiment of the invention provides an Internet of Things control system and method, electronic equipment, a storage medium and a program product, and relates to the technical field of industrial Internet of Things. The system comprises a connection management module used for establishing and maintaining connections between a plurality of Internet of Things devices and a plurality of MQTT servers corresponding to the Internet of Things devices; the dynamic equipment mapping module is used for mapping the data of the Internet of Things equipment to the MQTT server through the configuration file; and the message queue and network disconnection continuous transmission module is used for putting the message into the tail of the message queue to continuously transmit the message if the MQTT client instance corresponding to the Internet of Things equipment is detected to be in a network disconnection state when the message is published to the MQTT server. According to the scheme, dynamic expansion of heterogeneous equipment in the industrial Internet of Things, parallel butt joint of multiple cloud platforms, network disconnection continuous transmission and two-way communication capability are realized.

A terminal includes a transmitter that transmits a second signal specifying a resource for an initial transmission of a first signal on a sidelink; and a controller that selects, reserves, or pre-reserves a resource for the initial transmission of the first signal on the sidelink and at least one of one or more resources for one or more retransmissions of the first signal on the sidelink.

This UE can: transmit, on the basis of a configured grant, a physical uplink shared channel (PUSCH) including a transport block; and determine, on the basis of whether a packet delay budget of the transport block has expired, whether retransmission is performed according to a downlink control information (DCI) format if the DCI format related to the transport block is received.

Provided, according to one embodiment of the present disclosure, is a method for a first device carrying out sidelink communication. The method comprises the steps of: starting a first timer associated with a PSFCH resource on the basis that sidelink HARQ feedback information is not transmitted to a second device through the PSFCH resource on the basis of a first priority associated with the sidelink HARQ feedback information; on the basis that the first timer has expired, starting a second timer associated with a sidelink HARQ retransmission packet for a PSSCH or SCI; and receiving the sidelink HARQ retransmission packet from the second device after the second timer starts.

A method performed by a wireless device can include receiving a first physical downlink control channel (PDCCH) order initiating a first random access (RA) procedure for a candidate cell for layer-1 or layer-2 triggered mobility (LTM) procedure. The method can also include initializing a power ramping counter to a first value based on the first PDCCH order indicating initial preamble transmission. The method can additionally include receiving, after completing the first RA procedure, a second PDCCH order initiating a second RA procedure for the candidate cell. The method can also include, in response to receiving the second PDCCH order, initializing a preamble transmission counter. The method can further include incrementing the power ramping counter from the first value to a second value based on the second PDCCH order indicating preamble retransmission.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, configuration information indicating that network coding is enabled for initial transmissions associated with a multicast / broadcast service (MBS) and indicating that network coding is enabled for retransmissions associated with the MBS. The UE may receive, via a multicast traffic channel or a dedicated traffic channel, an initial transmission associated with the MBS, wherein the initial transmission is associated with a first set of encoded packets. The UE may transmit a radio link control (RLC) status feedback message associated with the initial transmission. The UE may receive, via the multicast traffic channel or the dedicated traffic channel, a retransmission associated with the initial transmission, wherein the retransmission is associated with a second set of encoded packets. Numerous other aspects are described.

The invention discloses a wireless network data reliability transmission system, which is used in the technical field of data transmission and comprises a slave gateway deployment and data aggregation module. A scheduling protocol and priority management module; a hierarchical caching and breakpoint resuming module; and a trend prediction optimization decision module. According to the invention, in combination with priority-based scheduling, link quality evaluation, data caching and retransmission mechanisms, reliable transmission of data with different priorities in a wireless network can be ensured, and normal transmission can be recovered through an efficient data recovery mechanism when the network is unstable; through real-time environment state estimation and prediction, communication parameters and resource scheduling can be dynamically optimized, network performance is effectively improved, and communication delay is reduced. The hidden state of a communication environment is estimated in real time through comprehensive analysis of link quality, event records and cache state data, future hidden state changes are predicted through a time sequence convolutional network, and potential performance degradation risks are recognized in advance.

The invention discloses a decentralized high-performance multicast method and system based on Gossip and RDMA, and relates to the field of computer network communication. The method has better reliability, realizes zero-loss transmission of data packets through message de-duplication, timeout retransmission, ACK / NACK convergence and a dynamic topology adaptation mechanism, ensures data consistency, and solves the problem of insufficient reliability of traditional UDP multicast; the method has the advantages that the real-time performance is high, the delay is low, the throughput is high, the zero copy and kernel bypass characteristics of the RDMA and the batch processing mechanism of the MPMC are combined, the average delay is lower than 10 microseconds, the throughput in a large data packet scene reaches 374GB / s, and the low-delay requirements of high-frequency transaction, high-performance calculation and the like are met; the method has high expansibility, is based on a decentralized architecture of an improved Gossip protocol, does not need core node maintenance topology, supports dynamic joining or quitting of nodes, can adapt to large-scale cluster expansion, and solves the expansibility bottleneck of centralized multicast.

The invention discloses a method, a system, equipment and a medium for improving reliability of high-frequency data acquisition in a multi-element load scene, and relates to the technical field of power system communication and data acquisition, comprising the following steps: broadcasting beacons to a station area and receiving terminal response, constructing dynamic network topology and channel state information, executing dynamic channel allocation based on the received information, and sending the dynamic network topology and channel state information to the station area. The method comprises the following steps: acquiring minute-level data packets, performing fragment coding on the acquired minute-level data packets, selecting an optimal path for each terminal for transmission in combination with a network state, collecting fragments at a receiving side, checking integrity, decoding and restoring when conditions are met, and otherwise, starting a local retransmission mechanism until the data packets are successfully recovered. According to the method, the reliability guarantee system is constructed by dynamically sensing the network state, cooperatively optimizing channel allocation and transmission paths and combining fountain code coding and a precise retransmission mechanism, and the success rate and the integrity of high-frequency data acquisition are remarkably improved in a multi-element load scene.

The invention discloses a video data processing method, electronic equipment and a readable storage medium, relates to the technical field of video data transmission, and is applied to a video data processing system which at least comprises an intelligent sensing module and a dynamic transmission module. The video data processing method comprises the following steps: extracting metadata in video data through an intelligent sensing module; collecting network state data, and sending the network state data and the metadata to a dynamic transmission module; target data transmission parameters are determined through the dynamic transmission module based on the network state data and the metadata, and the target data transmission parameters at least comprise one of redundancy, frame priority, code rate, retransmission parameters and quantization parameters; and transmitting the video data based on the target data transmission parameter. According to the technical scheme, the bandwidth utilization rate, the transmission real-time performance and the anti-frame-loss effect in the video data processing process are improved.

Example embodiments of the present disclosure are directed to a joint feedback for data packets retransmission. A method includes receiving, from a network device, a request for a first retransmission of a second data packet from a first protocol layer of the terminal device, during a second retransmission of the second data packet from a second protocol layer of the terminal device; and in response to receiving the request for the first retransmission of the second data packet, performing the first retransmission of the second data packet from the first protocol layer of the terminal device to the network device.

The invention discloses a multi-device and multi-language synchronous translation device and method based on a block chain and double AIs, and relates to the technical field of intelligent translation and edge computing, the device comprises a translation machine terminal, an edge computing node and a cloud server which form an end-edge-cloud three-level collaborative architecture, a translator terminal collects voice and lip shape information through a multi-mode sensing module, performs preliminary recognition by means of an edge lightweight AI unit, and realizes safe and rapid networking based on a block chain identity unit and an NFC touch networking unit. The edge computing node deploys a block chain group management module, a semantic collaborative optimization module and a local cache retransmission module, and is responsible for multi-language translation, semantic optimization and reliable distribution. The cloud server realizes global model training and term library management; according to the method, low-delay and high-accuracy multi-device synchronous interactive translation is realized through device authentication, voice recognition, edge optimization, multi-language parallel translation and adaptive transmission, and the translation efficiency and security in a multi-user and multi-language scene are remarkably improved.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, in a control resource set (CORESET) associated with a first CORESET pool index or a second CORESET pool index, downlink control information (DCI) including an indication that a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook scheduled in a first slot is to be retransmitted in a second slot. The UE may transmit, in the second slot and in connection with receiving the DCI, a first HARQ-ACK codebook associated with the first CORESET pool index or a second HARQ-ACK codebook associated with the second CORESET pool index. Numerous other aspects are described.

Provided are a data packet transmission method and apparatus, communication node and medium. The method includes transmitting a handover request message that includes information for a target donor node to forward data; and receiving retransmission data packets forwarded by the target donor node.

The invention relates to the technical field of system firmware upgrading, and provides an OTA upgrading method for a multi-split electronic control system, which comprises the following steps: when an upgrading task exists, in a first channel of a controller, the controller receives a new upgrading data packet sent by a wireless module and caches the new upgrading data packet to an internal cache region; the controller obtains state information of each actuator; the controller broadcasts the current upgrading data packet to all the actuators in the upgrading group at the same time; the controller receives a receiving result of the current upgrading data packet by each actuator, and selectively executes retransmission operation; when the continuous failure counter of a certain actuator exceeds a counting threshold value, starting a single-point recovery upgrading process for the rejected actuator; the retransmission operation is executed by the controller based on the state information of the actuator. The upgrading success rate of the equipment is effectively guaranteed, data receiving and transmitting blocking is avoided, and the system upgrading efficiency is remarkably improved.

The invention discloses a selective retransmission function test method, device and system for remote direct memory access, a medium and a product, and relates to the technical field of network tests.The method comprises the steps that when message features of a received test message are successfully matched with a packet loss rule, redirection processing is carried out on the test message so as to achieve controllable discarding, and the message features of the test message are successfully matched with the packet loss rule; according to the method and the device, the selective retransmission function is triggered, and the release rule corresponding to the test message takes effect to ensure that the subsequent corresponding retransmission message can be normally forwarded, so that only the first transmission of the original message is intercepted, the retransmission message is released, and the purpose of controllable packet loss is achieved; and finally, the selective retransmission function is evaluated according to the redirected message information in the function test process and the message receiving information of the message receiving end, so that the technical problems that the test packet loss is uncontrollable and the accurate test requirement is difficult to meet in the related technology can be solved, and the test efficiency is improved. The technical effects of accurate and controllable verification and performance evaluation of the selective retransmission function are achieved.

A communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for internet of things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology. The present disclosure provides a method and an apparatus for performing a random access by a terminal in a wireless communication system by starting a backoff timer for a random access preamble retransmission, determining whether a criterion to select a contention free random access resource is met during the backoff timer, selecting a random access resource for a transmission of a random access preamble when the criterion is met during the backoff timer, and transmitting, to a base station, the random access preamble in the selected random access resource.

The invention discloses a React Native-based cross-platform Bluetooth communication unified implementation method and system, and relates to the technical field of computers.The method comprises the steps that Bluetooth communication middleware is constructed, and a native Bluetooth interface is packaged; acquiring target equipment by adopting a multi-round scanning strategy of progressive increase timeout retry and combining with an equipment name keyword filtering and Map duplicate removal mechanism; dynamically negotiating an MTU value based on a device type, fragmenting long data according to MTU-13, and ensuring ordered transmission of the data through a sending queue, ACK confirmation and timeout retransmission; defining a standard data frame containing a prefix, a packet sequence, a data type, CRC (Cyclic Redundancy Check) verification and an ending identifier, and analyzing data through buffer area accumulation and integrity detection; the state management module is used for maintaining the equipment connection state and historical records, and automatic disconnection prompting, reconnection and UI navigation resetting are achieved; according to the invention, centralized Bluetooth connection, disconnection, reconnection and other functions can be processed, so that the stability of Bluetooth communication and the integrity of data are improved.

A wireless transmit / receive unit (WTRU) is configured to receive configuration information. The configuration information comprises an indication of a sidelink hybrid automatic repeat request (HARQ) round trip time (RTT) timer and a sidelink HARQ retransmission timer. The WTRU is configured to start the HARQ RTT timer based on whether the WTRU is configured with resources for a physical uplink control channel (PUCCH) for reporting sidelink HARQ feedback. The WTRU is configured to start the sidelink HARQ RTT timer after an end of a corresponding PUCCH transmission that includes SL HARQ feedback, on a condition that the WTRU is configured with resources for the PUCCH transmission. The WTRU is configured to start the sidelink HARQ RTT timer following a reception of a downlink control information that schedules a sidelink transmission, on a condition that the WTRU is not configured with PUCCH resources.

A wireless communication protocol which operates with multi-link devices (MLDs) having simultaneous transmit and receive (STR) link pairs to allow transmitting a long MU PPDU by an originator on a first link, which is acknowledged (Ack) by a recipient on a second link. The Ack on the second link may be on a single resource unit (RU) which may be shared by multiple stations. The Ack may be received during the MP PPDU on the first link, making it a quick Ack. In many cases this allows the originator to perform a retransmission within the same PPDU, thus especially benefitting real-time traffic which is latency sensitive.

The invention provides an RDMA-based big data transmission and storage system and method and a semiconductor detection device.The big data transmission and storage system comprises a hardware layer and a software layer, the hardware layer comprises an NVMe SSD storage array, an NVMe RAID acceleration card based on a GPU architecture and an RDMA network card, and the software layer comprises an NVMe SSD storage array, an NVMe RAID acceleration card based on the GPU architecture and an RDMA network card; the software layer comprises a multi-thread transmission module, a self-adaptive memory pool module, a transmission control module, a data verification and retransmission module, a scheduling and optimizing module and a disk falling and storage management module. According to the method, multi-channel transmission parallelization is achieved through data direct connection, zero copy transmission, RAID acceleration and multi-thread parallel RDMA transmission in a hardware link, data is directly connected and transmitted from a memory to the NVMe SSD storage array, data receiving and disk falling thread decoupling directly access the NVMe SSD storage array through asynchronous writing, network overload or storage blockage is avoided, and the data transmission efficiency is improved. The data transmission efficiency and reliability are high, and popularization and application in scenes needing large-scale image transmission processing such as semiconductor detection are facilitated.

The invention relates to the technical field of data processing, in particular to a message transmission method and device and related equipment. The method comprises the following steps: if it is determined that the RTT of a receiving end communicating with a set is greater than a preset threshold, establishing an RDMA connection in a UC mode with the receiving end; the first data message is sent to the receiving end, and after the receiving end receives the first data message, a second data message carrying an acknowledgement message is fed back to the sending end; if a second data message is received within a preset duration after the first data message is sent, it is determined that the first data message is successfully sent, and the preset duration is longer than the RTT; and if the second data message is not received after the preset duration, retransmitting the first data message until the second data message is received within the preset duration after the first data message is retransmitted currently, or the second data message is still not received after the number of retransmission times of the first data message reaches the preset number of times, and determining that the first data message fails to be sent.

The invention belongs to the technical field of wireless communication and data transmission, and relates to a wireless communication data storage method and system, and the method comprises the steps: a transmitting end packages original service data into a structured data frame, generates an implicit integrity fingerprint, carries out the parametric coding of a key field through employing the fingerprint as an index, and carries out the storage of the key field; the coding field and the other plaintext fields are combined into a composite transmission frame, related data in a memory of a sending end are cleaned after sending, and a receiving end analyzes the received frame, reconstructs and verifies the implicit fingerprint and generates a trusted data packet; if the transmission or verification fails, directional decoding and verification are carried out on the retransmission data based on the confirmed fingerprint value, and an updated trusted data packet is generated; according to the method, the problems that the effective load rate is reduced due to the fact that an explicit check field must be added in a traditional scheme, the system stability risk is caused due to the fact that a sending end occupies a limited memory for a long time to support retransmission, and the wireless bandwidth and node power consumption extra burden is caused by a complete frame retransmission mode are solved.

The invention relates to the technical field of communication, and discloses an equipment input signal general broadcast communication method, which comprises the following steps that: a central coordination node broadcasts a synchronization frame to establish a global time sequence; the terminal equipment determines an exclusive sending time slot based on identity label hash mapping, and carries out conflict-free transmission in combination with carrier sensing and a dynamic back-off mechanism; the center node periodically evaluates a channel state and adaptively adjusts a time slot structure and a hash parameter; an acknowledgement response and enhanced retransmission strategy is introduced to guarantee reliability; the terminal adopts a low-power-consumption monitoring mode to reduce energy consumption. In combination with an adaptive scheduling strategy of channel state perception, the system can dynamically optimize time slot resource configuration according to a real-time communication environment, and the spectrum utilization efficiency is remarkably improved. And due to the fine design of the carrier sensing and back-off mechanism, the occurrence rate of residual conflicts is further reduced, and reliable transmission of key data is ensured.

The invention discloses a multi-dimensional verification and exception backtracking method for a CTC system scheduling instruction. The method comprises the following steps: firstly, performing structured conversion on an instruction, endowing a global unique tracking identifier and complementing real-time context information; sequentially executing format, logic and equipment state three-layer progressive verification, completing logic verification by a configurable rule engine supporting hot update, and verifying the equipment state by adopting a hybrid retransmission mechanism with self-adaptive capability; after an instruction is issued, based on the tracking identifier, generating and associatively storing a structured log at each circulation node in real time, and constructing a full-link log chain; and when the instruction is abnormal, the full-link log is quickly retrieved according to the identifier, and a fault is accurately positioned and a report is generated by automatically checking the state of each node. According to the method, full-dimension safety verification, full-link state tracing and minute-level anomaly positioning of the instruction are realized, and the scheduling safety and the operation and maintenance efficiency are remarkably improved.

A HARQ method implemented in relation to channel coding may be suboptimal in that the HARQ method does not leverage features of the source coding. For example, it makes no difference to the HARQ method whether source coding is even performed, let alone whether some portions of the compressed bits output from the source encoder have higher levels of priority, e.g. higher levels of importance to the success of the source decoding. In some embodiments, a HARQ method for source coding is provided. The HARQ method for source coding may be performed with or without channel coding. A first set of source encoded bits may be sent in a first transmission (e.g. an initial transmission), and a second set of source encoded bits may be sent in a second transmission (e.g. a retransmission) based on feedback. The feedback may be an indication of source decoding outcome.

The invention provides a data transmission verification method and device, electronic equipment and a storage medium, and relates to the technical field of network communication, a unique connection identifier is allocated in a connection establishment stage of two communication parties, and a serial number field is designed as a combination of message length information and a random number; a connection identifier and a serial number field are packaged at the head and the tail of the data message respectively, a type-length-value structure message is carried in the middle of the data message, and the consistency of the connection identifier and the serial number field at the head and the tail of the data message is verified after the received message is de-packaged; and when verification fails, the current connection is terminated, and the connection is triggered to be reestablished to retransmit data, so that the problems that packet loss, data tampering or errors are easy to occur during RoCE data transmission in the prior art, and a traditional verification mode is high in calculation complexity, large in occupied bandwidth and high in reliability can be solved. And a traditional retransmission mode is easy to cause system performance reduction or system abnormity caused by access of a wrong memory address.

The invention relates to the technical field of network access selection, in particular to an intelligent network selection method and system in a router WLAN (Wireless Local Area Network). In the method, a finite-state machine is introduced, multiple operation stages of to-be-evaluated, candidate keeping, switching verification, switching execution and freezing observation are mapped into discrete states, and a state transition path is limited through state identification and trigger conditions; the access switching must meet the condition that the continuous period score difference value is positive and exceeds the minimum retention timer constraint, the probability of short-time fluctuation triggering switching is restrained from the decision level, the verification period is limited through a timestamp and a frozen window, and the packet loss rate, the retransmission rate and the disconnection frequency in the period are subjected to period statistics. When the statistical result exceeds the upper limit of the threshold value, back-off judgment is triggered, abnormal connection is recognized and revoked within the controlled time range, the continuous communication degradation risk caused by mistaken switching is reduced, constraint is carried out in combination with a load weighted value, and stability evaluation gives consideration to historical behaviors and the future risk trend.

The invention provides an adaptive high-performance consistent control method for a multi-agent system under denial of service (DoS) attack, and a sensing unit comprises a state sensing module carried on each agent, obtains body state information in real time, and shares information with other agents through an adjacent communication network; the information is used for error calculation and local control decision, and meanwhile, communication quality and whether interruption occurs are judged, so that the observability and anti-disturbance capability of the system are enhanced; a distributed control unit controller is deployed in each intelligent body, error mapping and performance constraint are carried out, a time-varying performance boundary is constructed, a control law and a self-adaptive estimation law are designed, a communication execution unit is responsible for transmitting a trigger signal, state estimation or control input generated by the controller among the intelligent bodies, intermittent DoS attacks can be tolerated, and the control law and the self-adaptive estimation law are designed. And an automatic retransmission and timeout judgment mechanism is provided, so that reliable transmission of key data is guaranteed. State estimation, performance recovery and efficient communication can be realized in a DoS attack environment.

The invention relates to the technical field of cross-border data secure transmission, and particularly discloses a semantic analysis-based cross-border data secure transmission method, which comprises the following steps of: dividing a sender credit investigation level through a multi-source credit investigation acquisition and semantic analysis model; the method comprises the following steps: preprocessing to-be-transmitted multi-modal data, and classifying the data through semantic alignment; matching transmission authority according to credit investigation levels and data types, separating transmittable data according to core / non-core data, and performing hierarchical encryption according to sensitive types of the data; data are transmitted through a cross-border private line of a TLS1.3 protocol, a sliding window and a retransmission mechanism are combined, and the integrity is verified by adopting a Hash algorithm. According to the invention, compliance dynamic adaptation is realized, protection precision and reliability are improved, and safety and efficiency are balanced.