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Data transmission method and device

A data transmission method and data packet technology, applied in the field of data transmission methods and devices, capable of solving problems such as data packet loss, data packet congestion, and data packet accumulation

Active Publication Date: 2018-05-01
HANGZHOU HIKVISION DIGITAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although the use of TCP protocol for media stream transmission can solve the problem of data packet loss, for media streams, the number of data packets to be transmitted per unit time is often constant. Therefore, when the bandwidth of the transmission network is narrowed , it is easy to cause the accumulation of data packets, which leads to the congestion of data packets

Method used

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  • Data transmission method and device

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Embodiment Construction

[0105] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0106] In order to avoid the problem of data packet congestion in the transmission network during the process of reducing data packet loss, the embodiments of the present invention provide a data transmission method and device.

[0107] Firstly, the data transmission method provided by the embodiment of the present invention will be described below.

[0108] It should be noted that the data transmission solution provided by the embodiment of the present invent...

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Abstract

Embodiments of the invention provide a data transmission method and device. The method comprises the following steps of receiving a data packet transmission request sent by a client; transmitting eachdata packet corresponding to the data packet request to the client based on a UDP according to a data packet sending sequence, wherein each data packet carries a serial number corresponding to the data packet, and the data packet sending sequence is a sequence determined according to the serial number of each data packet; receiving packet receiving information fed back by the client; and determining a lost target data packet according to the packet receiving information, and retransmitting the target data packet to the client based on the UDP. When a scheme provided by the embodiments of theinvention is applied for data transmission, a server transmits each data packet to the client based on the UDP, and the lost target data packet is retransmitted according to the packet receiving information, and furthermore, when the data packet is lost, the UDP does not need to narrow the frequency band width of a transmission network, accumulation of data packets is hardly caused, and a problemof data packet blockage is avoided.

Description

technical field [0001] The invention relates to the technical field of media stream network transmission, in particular to a data transmission method and device. Background technique [0002] At present, during the transmission of media streams (real-time video or real-time audio, etc.), the problem of data packet loss is prone to occur, especially when the network is unstable, the data packet loss is more serious. Once the packet loss problem occurs during the transmission of the media stream, there will be a freeze phenomenon when the media stream is played in real time, and the user experience is extremely poor. [0003] In the prior art, in consideration of data reliability, a TCP protocol (Transmission Control Protocol, Transmission Control Protocol) with a packet loss retransmission mechanism is often used to transmit media streams. Specifically, the server first sends a data packet to the client based on the TCP protocol, wherein the data packet is: divide the media ...

Claims

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Application Information

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IPC IPC(8): H04L1/16H04L1/18H04L29/06
CPCH04L1/1607H04L1/1858H04L1/189H04L69/164
Inventor 潘亚东李奎张小媛
Owner HANGZHOU HIKVISION DIGITAL TECH
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