Adaptive service quality ensuring method in multi-playing environment

A quality of service, self-adaptive technology, applied in the field of self-adaptive quality of service assurance in a multicast environment, can solve the problems of increasing coding difficulty, controlling the amount of information, consuming the router state table, and unable to solve congestion, etc., to optimize service quality and The effect of network utilization

Inactive Publication Date: 2004-09-15
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, this mechanism also has its own disadvantages
First of all, this mechanism has high requirements for encoding, and the adjustment of the receiving quality by each receiver often affects each other, which is difficult to coordinate
In the layered multicast mode, the adjustment granularity of layered encoding is relatively coarse, and generally only a few layers can be supported, because too many layers will increase the difficulty of encoding and control the amount of information, and will also consume a large amount of state on the router surface
In addition, dynamically joining and le

Method used

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  • Adaptive service quality ensuring method in multi-playing environment
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  • Adaptive service quality ensuring method in multi-playing environment

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Embodiment Construction

[0017] Here, an adaptive QoS guarantee method combining the sender-initiated mechanism and the receiver-initiated mechanism in a multicast environment is proposed.

[0018] figure 1 The network diagram of the adaptive QoS guarantee method is given. As can be seen from the figure, there is only one sender, but there are multiple receivers. A receiver handler is run on each receiver and a sender handler is run on the sender.

[0019] The receiver's processing flow is as follows figure 2 As shown, the function of the mechanism initiated by the receiver is mainly completed, and the mechanism initiated by the sender is activated at an appropriate time. Specific steps are as follows:

[0020] S1: The receiver monitors and judges the deterioration / improvement of the network through real-time statistics and analysis of parameters such as the packet loss rate and delay of the RTP protocol (Real-time Transport Protocol, real-time transport protocol).

[0021] S2: The receiver adju...

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Abstract

Combining initiating mechanism of sending party with initiating mechanism of receiving party, the invented method possesses advantages of both parties. Based on network state, initiating mechanism of receiving party adjusts quality of video received by receiver in real time, meanwhile sends a request for adjusting QoS grade to sending party at proper time through control layer to start up initiating mechanism of sending party. With request for adjusting being received, the sending party analyzes and adjusts integral video quality through sampling and negotiating to control, optimize video quality as well as raise network availability, preventing feed back storm and maintaining records of information and state for group members. In the invention, number required can be adjusted by terminal ends without need of intermediate node and router so as to suit current network and obtain best service quality.

Description

technical field [0001] The present invention relates to the technical field of network protocol communication, in particular to an adaptive QoS (Quality-of-Service) guarantee method in a multicast environment, especially a mechanism initiated by a sender and a mechanism initiated by a receiver. Combined with the adaptive QoS guarantee method, the receiver initiates the mechanism to adjust the video quality received by the receiver in real time according to the network conditions, and at the same time activates the sender to initiate the mechanism at an appropriate time, and the sender uses sampling negotiation to dynamically adjust the overall video quality , not only can control and optimize video quality and network utilization as a whole, but also isolate the part affected by network congestion in the multicast group, and provide different video quality for different users. Background technique [0002] There are two ways of traditional IP (Internet Protocol) communicatio...

Claims

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Application Information

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IPC IPC(8): H04L12/16H04L12/24H04L12/26H04L29/06
Inventor 刘敏石军石晶林李忠诚鲁士文
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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