Data sending method and data sending device

Abstract

Embodiments of the invention disclose a data sending method. The method comprises the following steps of through calculating network time delay of a preset time segment, analyzing time-delay changes of a current network; according to the time-delay changes of the current network, analyzing a network congestion state trend; according to the network congestion state trend, determining whether the current network is in a congestion state; when the current network is in the congestion state, reducing a sending rate of current sending data. The invention also discloses a correlation device. By using the method and the device, the sending rate can be adjusted in advance, and a technical problem that video transmission quality is severely influenced because congestion network recovery time is long in a low bandwidth network in the prior art is solved. In addition, through creating a sending window used for limiting an instantaneous sending rate, a network deterioration degree during a detection process can be further controlled; jamming and pause frequencies of video playing are greatly reduced and real-time and fluent performance of the video playing are guaranteed.

Description

Technical field [0001] The present invention relates to the field of communications, and in particular to a data transmission method and device. Background technique [0002] With the rapid development of the Internet and communication technology, the Internet has gradually become an indispensable aspect of people's lives. Correspondingly, applications that use the network for video transmission, such as video telephony, video conferencing, etc., have also attracted more and more attention. However, because the available bandwidth of the Internet itself changes all the time, if the transmitted video data exceeds the current available bandwidth, it will cause network congestion, which will not only cause video playback to freeze, reduce video quality, but also affect other services used on the Internet. If the transmitted video data is lower than the current bandwidth, the network resources cannot be fully utilized, and the video picture quality cannot be optimal. [0003] In orde...

AI Technical Summary

Problems solved by technology

[0004] However, the traditional network detection method judges whether the network is congested by analyzing whether there is packet loss in the network, and takes the occurrence of packet loss in the network as a sign of network congestion; in the existing technology, the sending rate will continue to increase during the video call. In the case of , reduce the sending rate

This network detection method is always adjusted after congestion occurs in order to avoid congestion again, that is to say, it first causes a kind of damage to the network, and then repairs it after detecting this damage; in the prior art, it cannot Reduce the sending rate in advance to avoid this corruption

For a high-bandwidth network, this impact is acceptable because it can quickly produce such damage and recover quickly; but for a low-bandwidth network, the current network has entered a high-latency state before triggering network packet loss. Congestion state, this delay may be as long as more than 10 seconds, and its recovery often takes longer, which seriously affects the real-time performance of video transmission (such as video phone data)

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