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Path estimating method and device

A path evaluation and path technology, applied in the field of data transmission and communication, can solve problems such as the inability to detect and evaluate the path quality of each path, and the inability to ensure the path communication quality of data transmission, so as to improve the quality of streaming media data transmission and real-time path quality , the effect of reliable data transmission

Active Publication Date: 2012-12-26
WUXI BUPT SENSING TECH & IND ACADEMY +1
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AI Technical Summary

Problems solved by technology

[0007] In the prior art, there is no solution that can accurately evaluate the path quality in real time, and it is impossible to effectively detect and evaluate the path quality of each path in real time, so that it is impossible to ensure that the path selected for data transmission has a high communication quality. quality

Method used

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  • Path estimating method and device
  • Path estimating method and device

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Embodiment 1

[0047] Such as figure 1 As shown, it is a flowchart of the principle of the path evaluation method provided by the embodiment of the present invention, wherein,

[0048] Step 10, calculating path quality evaluation parameters according to the round-trip delay, packet loss rate and congestion window of the path.

[0049] In the wireless environment, the transmission bandwidth is low, the channel bit error rate is high, and the path quality is unstable, which has a great impact on data transmission, and cannot meet the characteristics of high data real-time performance and large bandwidth requirements of streaming media. In order to solve the above problems, it is necessary to evaluate the path quality of each element in the path set, and accurately evaluating the quality of each path is a prerequisite for path detection and path selection strategies. In the selection of path quality evaluation parameters, the round-trip delay (RTT) describes the rate at which each data is sent...

Embodiment 2

[0121] Such as Figure 6As shown, the embodiment of the present invention provides a path evaluation device, which includes a path quality evaluation unit 100, a path division unit 200, a data transmission unit 300, and a heartbeat message unit 400, wherein,

[0122] A path quality evaluation unit 100, configured to calculate path quality evaluation parameters according to the round-trip delay, packet loss rate and congestion window of the path;

[0123] a path dividing unit 200, configured to divide paths into usable paths and unusable paths according to path quality evaluation parameters;

[0124] The data transmission unit 300 is configured to transmit data on an available path, and obtain the round-trip delay, packet loss rate, and congestion window of the path during data transmission;

[0125] The heartbeat message unit 400 is configured to send a heartbeat message on an unavailable path, and obtain the round-trip delay, packet loss rate, and congestion window of the pa...

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Abstract

The invention discloses a path estimating method which comprises the steps of: calculating a path quality estimating parameter according to a round-trip-delay, a packet loss probability and a congestion window of a path; dividing the path into an available path and an unavailable path according to the path quality estimating parameter; transmitting data on the available path and calculating the round-trip-delay, the packet loss probability and the congestion window of the path in a process of transmitting the data; and sending a heartbeat message in the unavailable path for calculating the round-trip-delay, the packet loss probability and the congestion window of the path. According to the invention, the path quality can be detected in real time, the path quality can be accurately calculated according to the simple parameter and the data transmission path is regulated and selected in real time, therefore the quality of the data transmission path is ensured, and the data is reliably transmitted. The path quality can be effectively estimated, and the transmission quality of streaming media data is improved.

Description

technical field [0001] The invention relates to the technical field of data transmission and communication, in particular to a path evaluation method and device. Background technique [0002] With the widespread access of broadband networks, video on demand VOD will become one of the most important data services of the next generation Internet. Mobile Internet is one of the main development trends of the next generation Internet, and video-on-demand will also be widely used in the mobile Internet. Especially in recent years, the rise of Mobile P2P (MP2P) technology has enabled large-scale application of video-on-demand systems in wireless mobile networks. [0003] In the MP2P network, each node shares its own storage, bandwidth and other resources. By making full use of idle node resources in the system, the sharing degree of streaming media data between nodes has been greatly improved, thereby enhancing the service of the streaming media system. quality. The MP2P video-o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L12/26
Inventor 许长桥张宏科关建峰刘天骄贾世杰黎卓峰
Owner WUXI BUPT SENSING TECH & IND ACADEMY
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