A message transmission method and user equipment

Abstract

The present invention discloses a message transmission method and user equipment, wherein the method includes: the sending node transmits multiple messages to the receiving node, receives multiple confirmation messages from the receiving node, and based on the received multiple confirmation messages After the message determines that the first message is lost, retransmit the first message; if it detects that the retransmitted message is lost, then within a predetermined time interval, the sending node retransmits the first message to the receiving node continuously for at least twice. The scheme of the present invention can detect and recover in time after packet loss occurs in the retransmitted message, reduce the number of overtime retransmissions, improve the transmission rate, and at the same time, reduce the packet loss probability of the retransmitted message, thereby reducing the timeout retransmission The probability.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a message transmission method and user equipment. Background technique [0002] In computer network communication, the packet loss recovery algorithm plays a vital role. It is an important algorithm in the TCP (Transmission Control Protocol) protocol stack to ensure the reliability of data transmission. It is a given in the case of data packet loss. The fault tolerance mechanism also directly affects the efficiency of data transmission and the utilization rate of network bandwidth. RFC2581 defines and describes typical packet loss recovery algorithms, mainly including timeout retransmission and fast retransmission. Timeout retransmission is an important mechanism for the TCP protocol to ensure data reliability. The principle is that the sending node starts a timeout timer after sending a message. If the timeout timer expires, the sending node still has not recei...

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Problems solved by technology

[0008] However, through testing, it is found that whether the DAC algorithm or the SACK+ algorithm is used, there is a high probability that the retransmission packet loss cannot be detected in time, so that the retransmission packet cannot be detected and recovered by the sender in time after the retransmission packet is lost, which eventually leads to Timeout retransmission, and in the scenario of high packet loss rate, frequent timeout retransmission will lead to an increase in transmission delay and a sharp drop in transmission rate

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