UDT (UDP-based data transfer) protocol based control method for reliable transmission in high-speed network

Abstract

The invention belongs to the technical field of high-speed network data transmission, in particular to a UDT (UDP-based data transfer) protocol based control method for reliable transmission in a high-speed network. The method comprises the steps as follows: firstly, two functional parts, namely, an ACK (acknowledgement character) control packet counter and a lost retransmission list are added to a sender; the ACK control packet counter is used for counting control packets having the same ACK serial number, so that retransmission time of data packets is confirmed; the lost retransmission list is used for recording serial numbers of the lost data packets which are retransmitted by the sender but are not confirmed by the ACK control packet; transmission control comprises the specific steps as follows: the sender starts the ACK control packet counter to obtain counted information of the received ACK; whether the retransmitted data packets are lost is estimated through information statistics of the ACK control packet counter, and time for retransmitting the data packets again is determined according to set threshold values. The method has the advantages that the congestion condition of links can be relieved, timely retransmission can be realized, and transmission speed cannot be greatly affected.

Description

technical field [0001] The invention belongs to the technical field of high-speed network data transmission, and in particular relates to a control method for reliable transmission based on UDT protocol in a high-speed network. Background technique [0002] With the development of high-speed networks, the traditional TCP transmission protocol increases with the increase of RTT transmission delay and packet loss, and the TCP data flow does not occupy the available bandwidth. At this time, the transmission protocol based on UDP has greater transmission advantages. On the one hand, the UDP-based transport protocol has lower transmission cost, faster speed, less resource consumption, and can obtain higher throughput; on the other hand, the UDP-based application layer transport protocol can adjust the flow control and congestion control mechanism to make it more suitable The transmission characteristics of the current network utilize the transmission bandwidth of the high-speed n...

AI Technical Summary

Problems solved by technology

[0008] As a solution for high-speed transmission network, the UDT protocol has serious deficiencies in the reliability control of file transmission, which makes the available network bandwidth wasteful.

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