Rate reduction parameter optimization method based on a congestion degree factor

A technology of congestion degree and optimization method, applied in the direction of digital transmission system, data exchange network, electrical components, etc., can solve the problems of insufficient network utilization, unsuitable drop rate, limited reception rate and queuing delay.

Inactive Publication Date: 2019-06-18
WUHAN UNIV
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Problems solved by technology

However, the fixed drop rate cannot be applied to different levels of congestion, which will not only cause insuf

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  • Rate reduction parameter optimization method based on a congestion degree factor
  • Rate reduction parameter optimization method based on a congestion degree factor
  • Rate reduction parameter optimization method based on a congestion degree factor

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Embodiment

[0072] In this embodiment, two computers of Windows system are used as client 1 and client 2, and real-time video communication programs based on the WebRTC framework are respectively run on the two clients. The server program runs on client 1 and provides services such as signaling processing for the two clients. All devices are connected to the same local area network, using network simulator, fixed network attribute parameters: available bandwidth 500Kbps, network packet loss 2%, propagation delay 100ms.

[0073] The method for optimizing the rate reduction parameter based on the congestion degree factor in this embodiment, the specific work can be divided into two parts: the sending end and the receiving end, and the specific process structure is shown in the appendix figure 1 .

[0074] The receiving end needs to complete the following tasks:

[0075] (1) Count the packet loss rate, jitter delay and other related information in the received RTP data packets, construct a...

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Abstract

The invention discloses a rate reduction parameter optimization method based on a congestion degree factor. The rate reduction parameter optimization method is applied to a point-to-point multimedia real-time communication system based on an RTP/RTCP protocol. The method comprises the following steps of the receiving end adaptively selects a congestion threshold value according to the inter-frametime delay change condition, generates a state signal S by combining the queuing time delay change condition of the current frame and the congestion threshold value, and adjusts the sending rate according to the state signal. When the network is congested, the congestion degree is quantified, a rate reduction parameter is calculated according to the congestion degree, and the sending rate is controlled to be reduced as the step length; and finally,the final sending rate is calaculated by combining the estimated values of the rate control modules of the sending end and the receiving end to thesending rate. Compared with the prior art, the method can be suitable for various network environments, the incoming rate can be increased, the packet loss rate and the network delay can be reduced, and more stable and smooth multimedia real-time communication service can be brought to users.

Description

technical field [0001] The invention relates to a congestion control technology in a multimedia real-time communication system, in particular to a method for optimizing a rate reduction parameter based on a congestion degree factor. Background technique [0002] At present, with the rapid development of the Internet and the large-scale popularization of various mobile terminals, people have more and more demands for multimedia real-time communication services. Congestion control is one of the important links to ensure network transmission efficiency and multimedia quality. [0003] However, most of the congestion control technologies are implemented based on the TCP protocol, which is not applicable to the RTP / RTCP protocols that are used more in the current multimedia real-time communication system. The TCP protocol relies on the sliding window for flow control. The size of the sliding window is adaptive to the jitter change, which has a great impact on real-time transmissi...

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Application Information

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IPC IPC(8): H04L12/801H04L12/825H04L12/26
Inventor 朱荣罗嘉鑫钟志辉王中元
Owner WUHAN UNIV
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