Video transmission-oriented network bandwidth detection and prediction method and system

Abstract

The invention discloses a video transmission-oriented network bandwidth detection and prediction method and a video transmission-oriented network bandwidth detection and prediction system. The network bandwidth detection and prediction method comprises the following steps of calculating a current available network bandwidth according to a media stream length and receiving time; and predicting an available bandwidth at the next moment according to network bandwidths in the first N time intervals by utilizing a normal-distribution-based bandwidth prediction model. According to the method and the system, the bandwidth is measured in a way of adding information to a media stream, so that the shortcoming of requirements on the transmission of a great number of test data packets in the conventional method is overcome, the available bandwidth of a network can be quickly acquired under the condition of no influence on multimedia transmission, and the method and the system are high in practicability; and the normal-distribution-based bandwidth prediction model is also used for quickly and accurately predicting the available bandwidth of the network at the next moment according to measured data, and quick regulation and accurate prediction can be realized even under the condition of greater bandwidth changes.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a video transmission-oriented network bandwidth detection and prediction method and system. Background technique [0002] With the continuous expansion of the scale of the Internet, especially the rapid development of the wireless Internet, the inherent heterogeneity, dynamics, and diversity of application terminals of the Internet have become more prominent, which has brought new challenges to Internet-based multimedia sharing. - Internet-based multimedia sharing must have a high degree of flexibility and robustness to adapt to these characteristics of the Internet. [0003] In order to achieve this kind of flexibility and robustness, in addition to efficient and flexible media codec technology, a fast and accurate network performance detection mechanism is also required to provide a basis for the current multimedia sharing process. Efficient and flexible media coding an...

AI Technical Summary

Problems solved by technology

Since active measurements need to send traffic to the network, it will increase the network load and affect network performance

Passive measurement is to use certain software and hardware to passively monitor the packet flow in the network to estimate the network bandwidth. Since no detection packets are sent to the network, it will not increase additional network traffic, but it is relatively difficult to deploy. Generally, it needs to be configured. Have special equipment or have special permissions

Passive network bandwidth measurement techniques are not widely used due to issues such as high permission requirements and expensive equipment

[0006] Moreover, the mainstream active bandwidth measurement models all need to send a large number of test data packets to the network, which increases the burden on the network, and the measurement process usually takes a long time. Obviously, such a bandwidth measurement model cannot be directly applied to real-time transmission of a large number of In the multimedia transmission system of data, in view of this, the present invention proposes a network bandwidth detection and prediction method and system for video transmission

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