Congestion control processing method

Abstract

The invention relates to streaming media transmission technique and provides a congestion control processing method based on a RTP protocol. The congestion control processing method comprises the following steps: linearly increasing the transmission rate of TCP stream, and linearly increasing the transmission rate of streaming media; when the increase amplitude of the transmission rate of the streaming media is greater than the increase amplitude of the transmission rate of the TCP stream, multiplicatively decreasing the transmission rate of the streaming media; under the conditions that the packet loss rate increases but the network is not in the congestion state, multiplicatively decreasing the transmission rate of the streaming media; and monitoring whether the network is in the congestion state or not, if the network is in the congestion state, multiplicatively decreasing the transmission rate of the TCP stream, and if the network is not in the congestion state, returning to the step one. The invention can carry out stream control on the multimedia stream when the packet loss rate increases but the congestion is not formed to avoid congestion with lower cost, and simultaneously decreases the transmission rate of the TCP stream and the transmission rate of the multimedia stream under the condition that the congestion occurs, thereby shortening the time of the network for releasing the congestion and ensuring the fluency of streaming media transmission.

Description

technical field [0001] The invention relates to streaming media transmission technology. Background technique [0002] With the rapid development of network technology, network video streaming services are increasingly widely used, including streaming media technologies such as VoD (video on demand, video on demand) and IPTV, which gradually enter people's lives. These applications have high requirements on QoS (quality of service, quality of service), and network congestion and insufficient bandwidth have become the bottleneck of network applications. In order to meet the requirements of playback quality, network congestion must be avoided as much as possible. [0003] AIMD (Additive Increase Multiplicative Decrease, Additive Increase, Multiplicative Decrease) is a method for the transport layer to solve congestion control in the TCP / IP model. When the TCP sender feels that the end-to-end path is not congested, it will linearly increase the sending speed of the TCP flow, a...

AI Technical Summary

Problems solved by technology

At present, for the problem of network congestion caused by streaming media based on the RTP protocol, the commonly used solution is to unilaterally reduce the sending rate of TCP streams through congestion avoidance and congestion control strategies, so that TCP streams often allocate very few resources.

This leads to the unfairness of network resource occupation, the decline of network QoS, serious network congestion, and even network paralysis.