5 results about "Retransmission timeout" patented technology

The present disclosure describes method, apparatus, and computer readable media for dynamically updating a retransmission timeout (RTO) period for data transmissions in a communication system. In an aspect, the method comprises a first step of computing a round-trip time (RTT) period for a successful data transmission between a client and a server in the communication system. The method also comprises a second step of updating the RTO period after the successful data transmission based at least on the computed RTT period. Finally, the method comprises repeating the first and second steps after every Mth successful data transmission, wherein M is an integer with a value greater than 1.

The application discloses a kind of underwater acoustic node adaptive retransmission methods based on distance measurement, comprising the following steps: sending node transmits data to target node and starts timer;Target node receives data, and transmits to sending node after processing;Judge whether the data transmitted by target node is successfully received by sending node, if the data transmitted by target node is not received or cannot be completely correctly received by sending node within retransmission timeout time, then retransmit according to retransmission rule;Sending node and target node complete two-way communication, and input and update other node information table stored in sending node during communication process.The application carries out distance measurement while node communication, improves the utilization efficiency of data;Node characteristic information is included in the selection standard of retransmission rule, and is constantly updated, improves the data transmission throughput between nodes, and improves the adaptability of node under different underwater acoustic channel conditions.

The invention provides a DPU-based remote direct memory access data transmission mechanism optimization method and device, and the method comprises the steps: creating a new queue pair connection, and transmitting a data packet at a preset rate; monitoring and calculating round-trip time of the preset number of data packets, and calculating a round-trip time average value of the preset number of data packets; taking the round-trip time average value as initial round-trip time, and setting initial retransmission timeout time according to the initial round-trip time and a preset algorithm; and monitoring the network condition in real time, when an abnormal condition occurs, executing the steps again, calculating a new round-trip time average value, and adjusting the retransmission timeout time according to the new round-trip time average value. According to the method, efficient and reliable remote direct memory access data transmission service can be provided under the environment that the network condition dynamically changes, and the performance and stability of the whole system are effectively improved.

The invention discloses a communication system and method based on an embedded WiFi chip. The system comprises a physical hardware layer, a logic interface layer and an enhancement function layer, the physical hardware layer carries a target embedded WiFi chip and is used for providing a physical basis for wireless communication; the logic interface layer runs on the physical hardware layer and is used for carrying out adaptation and function extension on a driver of the WiFi chip and providing an interface allowing the enhancement function layer to read real-time state information of the physical hardware layer; the enhancement function layer runs on the logic interface layer and comprises a dynamic switching module and a forward error correction and adaptive retransmission fusion module; the dynamic switching module is used for creating a background scanning thread, scanning channel quality and triggering and executing rapid switching to a better channel when the current channel quality is lower than a preset threshold value; and the forward error correction and adaptive retransmission fusion module is used for adaptively adding redundant error correction codes to the transmitted data packets and dynamically calculating retransmission timeout time of the data packets needing to be retransmitted.

The invention discloses a method and a device for determining a retransmission timeout initial value based on satellite-ground multimode. The method comprises the following steps: acquiring a first access network type of a terminal at a first moment and a second access network type of the terminal at a second moment, the second moment being a previous moment of the first moment; comparing the first access network type with the second access network type to obtain a first comparison result; and under the condition that the first comparison result indicates that the first access network type and the second access network type are inconsistent, adjusting a retransmission timeout initial value of the retransmission duration of a transmission control protocol (TCP) to a target retransmission timeout initial value according to the first access network type. According to the invention, the technical problem that the retransmission timeout initial value cannot adapt to a new network environment, resulting in excessive retransmission or retransmission delay of a TCP retransmission mechanism, thereby affecting the data transmission efficiency and network resource utilization is solved.