Method for retransmission of lost data packet and terminal

Abstract

The invention provides a method for retransmission of a lost data packet and a terminal. The terminal comprises a time calculation module, a time comparison module and a lost-data-packet retransmission judgment module, wherein the time calculation module is used for calculating the time period between the time for sending a request for last transmission of the same lost data packet and the current time, the time comparison module is used for comparing the time period obtained by the time calculation time with the network transmission delay time, the lost-data-packet retransmission judgment module is used for judging whether the result obtained by the time comparison module indicates that the time period between the time for sending the request for last transmission of the same lost data packet and the current time is longer than the network transmission delay time or not, and if yes, the request for retransmission of the lost data packet is sent again. According to the scheme, the problems that in the prior art, due to the fact that a terminal sends a request for retransmission of a lost data packet repeatedly, a sending end needs to repeatedly send the same lost data packet, the network bandwidth is insufficient, and the speed of the network for data transmission is affected are solved.

Description

technical field [0001] The invention relates to the field of network data transmission, in particular to a method and terminal for retransmitting lost packets. Background technique [0002] With the development of network data transmission technology, the speed of data transmission is getting faster and faster, but in the process of data transmission, the situation of data packet loss or packet loss often occurs. For audio data, the RTP (Real-time Transport Protocol) transmission protocol is used to ensure the real-time interaction of video and audio applications. The RTP transmission protocol is based on the UDP (User Datagram Protocol) transport layer, so the integrity of data transmission cannot be guaranteed. When a partial failure or congestion occurs in the network, data packets will be lost. If the data packets are restored, frame skipping or mosaic will appear in the image playback at the receiving end, and howling, broken sound or distortion will occur in the audio...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a method and terminal for packet loss retransmission, which solves the problem of insufficient network bandwidth caused by the packet loss sending end repeatedly sending a packet loss due to the terminal sending multiple packet loss retransmission requests in the prior art , the problem of affecting the speed of network transmission data, in order to solve the above problems, the present invention adopts the following technical solutions:

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