Congestion control processing method

A processing method and congestion control technology, applied in the direction of digital transmission systems, electrical components, transmission systems, etc., can solve the problems of unfair network resource occupation, low TCP flow resources, network QoS drop, etc., to ensure smoothness, small Cost, the effect of shortening the time of congestion

Inactive Publication Date: 2010-05-26
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
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  • Application Information

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.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0018] The present invention proposes a processing method of congestion control based on RTP protocol, which adopts the server-side tentative rate congestion control technology to hand over the network congestion problem to the server side for its own processing, and the server side increases the packet loss rate but the congestion does not form , that is, to perform flow control on multimedia streams.

[0019] In terms of specific implementation, take the following steps to achieve:

[0020] a. The server continuously tentatively increases the sending rate of the streaming media by calculating the sending rate through the tentative sending rate method, and increases the sending rate of the TCP stream through the AIMD method. Determine whether the packet loss rate p is less than the threshold Y. If the packet loss rate p is higher than the threshold Y, skip directly to step c and execute:

[0021] Among them, the test sending rate method is:

[0022] V new =(1+γ)V last (0<...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L29/06H04L12/811
Inventor 王海鹏余健
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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