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Network state estimation method based on packet loss rate

A packet loss rate and network technology, applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve problems such as bandwidth fluctuation, affecting video playback QoS, and inability to correctly judge streaming media servers, so as to reduce the impact time and eliminate The effect of network random interference and smooth bit rate transition

Active Publication Date: 2009-12-09
ZTE CORP
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AI Technical Summary

Problems solved by technology

Since the bandwidth of the mobile communication network fluctuates violently, only using the low-pass filter shown in equation (1) cannot make the streaming media server make a correct judgment on the current state of the network, thus affecting the QoS of video playback. Therefore, it is necessary to propose A better way to estimate network state

Method used

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  • Network state estimation method based on packet loss rate
  • Network state estimation method based on packet loss rate
  • Network state estimation method based on packet loss rate

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Embodiment Construction

[0031] Random interference in the mobile communication network exists all the time, and it manifests as data packet loss, network delay and jitter in the application of mobile streaming media. Under the premise that the data rate sent by the streaming media server is lower than the bandwidth of the mobile network, random interference has an impact on data transmission, resulting in network packet loss, and the packet loss rate should be within a certain reasonable range. For the network packet loss in this case, the streaming media server can better estimate the network conditions and change the data transmission rate smoothly to ensure QoS by applying the filter represented by equation (1). If the packet loss rate fed back by the mobile terminal exceeds a certain reasonable range, it is considered that a bandwidth mutation has occurred and special handling is required.

[0032] During mobile streaming video playback, when the network condition is good, such as Y n-1 = 0, the s...

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Abstract

The present invention proposes a network state estimation method based on packet loss rate, comprising the following steps: (1) streaming media server initializes the parameters of the filter; (2) receives a reception report from a mobile terminal, and extracts packet loss rate information Xn therefrom ; (3) When the packet loss rate Xn is greater than its set packet loss rate threshold XLimit, it is considered that the network has a sudden change in bandwidth, and filter 2 is used to replace Xn with XLimit to participate in the filtering operation to obtain the filtered packet loss rate Yn, and according to This determines the current state of the network.

Description

technical field [0001] The invention relates to streaming media application technology, in particular to a state estimation method of a mobile communication network and a service quality control technology in a streaming media transmission process. Background technique [0002] Streaming media technology is a technology that uses the network to transmit multimedia information such as audio, video, and animation continuously and in real time in a streaming manner. Streaming media does not download the entire file before playing, but only caches part of the content; when streaming media data is played on the client, the rest of the file continues to be downloaded from the streaming media server. An important application field of the streaming media technology in the wired network is IPTV (Interactive Personal TV, Interactive Network Television), and a main application field in the mobile communication network is the mobile streaming media. [0003] A key technology of streami...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/26H04L12/24H04L12/56H04L47/32
Inventor 王卫华李加周张建强王志英
Owner ZTE CORP
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