6results about How to "Improve retransmission efficiency" patented technology

The invention provides an electric control box remote data acquisition system based on the Internet of Things, and relates to the technical field of data processing, and the method comprises the steps: obtaining the operation state data of an electric control box through a sensor, transmitting the operation state data through a wireless signal network, obtaining a data frame set, analyzing the data identifier of each data frame, verifying the integrity of the data, and obtaining the data frame set; determining performance parameters of the wireless signal network, detecting whether an abnormal change occurs in the transmission process, generating a solution when the abnormal change occurs, generating a retransmission signal when packet loss occurs in the transmission process, determining a retransmission queue according to the data identifier, and transmitting the retransmission signal according to the retransmission queue when delay occurs in the transmission process. The priority of a retransmission queue and the distribution of network bandwidth are dynamically adjusted, and when signal attenuation occurs in the transmission process, the execution sequence is adjusted according to the operation record and result of a solution by switching a transmission channel and adjusting transmission power. The transmission process of the operation data of the electric control box can be detected.

The invention provides a retransmission data processing method and device, and the method comprises the steps: receiving initially transmitted coding block data, recording the position information of a coding block with a wrong initial interpretation code, and storing a decoding result of the coding block with a correct initial interpretation code; and when retransmission corresponding to the initial transmission occurs, calculating time domain and frequency domain resources and pilot frequency resources corresponding to the coding block of the initial interpretation code error according to the position information of the coding block of the initial interpretation code error and configuration information of retransmission, so that only time domain and frequency domain resource data and pilot frequency data corresponding to the initial interpretation code error are transmitted when data are transmitted forwards. The retransmission efficiency can be improved, the transmission reliability is guaranteed, and the processing performance is optimized.

The invention discloses a method for ensuring the reliability of multicast transmission, which belongs to the technical field of local area networks, and comprises the following steps: step 1, a sender allocates a globally unique and progressively increasing serial number for each multicast data packet, and adds FEC (Forward Error Correction) redundant code in multicast data; 2, a receiver receives a multicast data packet, records continuous serial numbers through a sliding window, traverses the serial numbers in the sliding window, judges whether the serial numbers are continuous or not, if yes, it is judged that packet loss does not occur, the step 7 is executed, and if not, the step 3 is executed; 3, the receiver identifies redundant packets for receiving the multicast data packets according to the FEC redundant codes, counts the number of the redundant packets and judges whether the number of the redundant packets is larger than or equal to a threshold value or not, if yes, local error correction is carried out to recover data, then the step 7 is executed, and if not, the step 4 is executed. According to the method, the'confirmation storm 'is inhibited fundamentally, and the efficient balance of the network load is realized.

The present application discloses a data transmission method, device, communication equipment and storage medium, which belongs to the field of wireless communication technology. The method includes: sending data blocks to at least two sites by multicast or broadcast; receiving block confirmation BA information sent by at least two sites, the BA information is used to indicate the corresponding site failed to receive the data unit; according to the BA information sent by at least two sites, the data units that failed to be received by at least two sites are XOR-encoded to obtain network coded data of the data block; and the network coded data is sent to at least two sites by multicast or broadcast. The above scheme obtains the reception status of the data unit by each site, and XOR-encodes the data unit that needs to be retransmitted, thereby ensuring that each site can decode the encoded data to obtain the data unit that has not been successfully received, while reducing the amount of data that needs to be transmitted, thereby improving the retransmission efficiency in the multicast or broadcast scenario.

The embodiment of the present application provides a data timeout retransmission method, device, equipment, storage medium and product. The technical scheme provided by the embodiment of the present application determines the forward packet loss prediction probability from the sending end to the receiving end and the reverse packet loss prediction probability from the receiving end to the sending end in the case of network connection, determines the packet loss coefficient of the receiving end sending the confirmation information, and determines the data packet loss prediction probability according to the packet loss coefficient and the reverse packet loss prediction probability. The data timeout retransmission strategy can be determined according to the forward packet loss prediction probability and the data packet loss prediction probability, and the data timeout retransmission processing is performed based on the data timeout retransmission strategy. The data timeout retransmission processing is accurately determined whether to be performed in combination with the network condition and the forward and backward packet loss prediction condition, unnecessary data retransmission can be effectively reduced, the data retransmission amount is effectively reduced while the function of the timeout active retransmission is realized, the data retransmission efficiency is improved, and the data timeout retransmission effect is improved.

The invention discloses a QUIC-based multi-path data transmission method and device and a storage medium, and belongs to the technical field of data transmission. The method comprises the following steps: packaging data to be transmitted into at least one data frame, and distributing a data packet sequence number for the data frame in a connection level packet sequence number space; selecting a target transmission path from the data transmission paths, generating a data packet, sending the data packet to a receiving end through the target transmission path, and recording a data packet sending record; and receiving an acknowledgement frame fed back by the receiving end, and determining a data packet to be retransmitted according to the acknowledgement frame and a data packet sending record. Based on the characteristic that the serial number of the connection-level data packet is monotonically increased, the to-be-retransmitted data packet is determined according to the acknowledgement frame, and a serial number packet space does not need to be allocated to each path, so that the coupling degree of data transmission is reduced, the retransmission efficiency is improved, RTT is calculated according to the acknowledgement frame, the link condition is evaluated, a reasonable sending speed is obtained, and the transmission efficiency is improved. The effect that any path is reliable in transmission is achieved.