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Packet loss retransmission method and system

A technology for retransmission and retransmission of lost packets, applied in transmission systems, digital transmission systems, error prevention/detection using return channels, etc. Channel transmission efficiency and other issues to achieve the effect of improving data transmission efficiency and quality

Inactive Publication Date: 2020-02-07
CHENGDU TD TECH LTD
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  • Description
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Problems solved by technology

Therefore, when the network environment is not good, the transmission efficiency of the entire RTP channel will be affected due to the increase of retransmission packets, so that not only the transmission efficiency of retransmission packets will be reduced, but the transmission efficiency of normal RTP packets will also be reduced, and then It will affect the data transmission performance between the receiving end and the sending end

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  • Packet loss retransmission method and system
  • Packet loss retransmission method and system
  • Packet loss retransmission method and system

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Embodiment Construction

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] Considering that control signaling packets such as packet loss and retransmission requests are transmitted on the RTCP channel, the transmission resources occupied are very small. Compared with the RTP channel used to transmit normal RTP packets and retransmitted RTP packets, RTCP The amount of data transferred by the channel is small. The core idea of ​​the present invention is to make full use of the relatively idle state of the RTCP channel, and put the retransmission packet on the RTCP channel for transmission, so as to reduce the amount of data transmission on the RTP channel and improve the efficiency and efficiency of data transmission between the sending end and the receiving end. transmission quality.

[0027] image 3 I...

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Abstract

The invention discloses a packet loss retransmission method and system. The method comprises the steps that receiving end equipment sends a packet loss retransmission request to sending end equipment;the sending end equipment sends a corresponding real-time transport protocol (RTP) retransmission packet to the receiving end equipment through an RTP control protocol (RTCP) channel according to thepacket loss retransmission request; and when the receiving end equipment receives a data packet on the RTCP channel and judges that the data packet is an RTP retransmission packet, the data packet isput into a corresponding framing queue. According to the invention, the data transmission efficiency and quality can be improved.

Description

technical field [0001] The present invention relates to data transmission technology, in particular to a packet loss retransmission method and system. Background technique [0002] In the case of a bad network environment, in some important applications, it is extremely important to ensure the quality of images or sounds, and retransmission of lost packets is a common technology. [0003] figure 1 It is a schematic diagram of the process of the existing packet loss retransmission method. Such as figure 1 As shown, in the existing packet loss processing scheme, when the receiving end finds that there is a real-time transport protocol (RTP) packet loss, it will fill the sequence number of the RTP packet of the lost packet into the packet loss retransmission request, and the sending end receives After the packet loss retransmission request, the requested RTP packet is sent out from the buffer queue. After receiving the retransmitted RTP packet, the receiving end will put it ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L29/06
CPCH04L1/1829H04L65/80H04L69/26H04L65/65
Inventor 李敬来
Owner CHENGDU TD TECH LTD
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