Method and device for detecting available bandwidth

Abstract

The invention discloses a method and a device for probing an available bandwidth, belonging to the field of internet technology. The method comprises the steps of: receiving first probing data packetssent by a sending end every preset time period; calculating a delay value of one-way delay of the first probing data packets within the current time period; and when the delay value of one-way delayis determined to change suddenly, taking the receiving rate calculated according to the data volume of the first probing data packets as an available bandwidth within the current time period. The method and the device do not rely on multimedia data packets, but probe based on the first probing data packets special for probing an available bandwidth. Since the first probing data packets do not contain related data of audio and video communication, the loss does not affect the communication quality, and the packet loss probability of each kind of data packets in a network is the same. When the network is congested, in the presence of the first probing data packets, the lost multimedia data packets are less than those in the prior art, so that the audio and video communication quality is obviously improved. Therefore, the probing method is more reasonable.

Description

technical field [0001] The invention relates to the technical field of the Internet, in particular to a method and device for detecting available bandwidth. Background technique [0002] With the development of Internet technology and the expansion of network services, the number of instant applications on the Internet has increased sharply. While users enjoy the convenience brought by instant applications, they also put forward higher requirements for the service quality of instant applications. However, the ever-increasing real-time applications increase the load on the network and cause the network equipment to operate under load. Therefore, it is necessary to detect the available bandwidth reflecting the transmission capacity of the network, so as to adjust the service policy according to the available bandwidth, thereby improving the service quality of the real-time application. [0003] In the scenario of audio and video communication with the help of instant applicat...

AI Technical Summary

Problems solved by technology

[0004] Since the existing technology detects the available bandwidth based on the multimedia data packet, and can detect the available bandwidth when the one-way delay of the multimedia data packet increases, when the one-way delay of the multimedia data packet increases, the network is congested. A large number of multimedia data packets have already experienced packet loss. In the process of audio and video communication, lost multimedia data packets will cause voice freezes, word loss, and changes in tone and silence, thereby reducing the quality of audio and video communication. Therefore, the existing detection methods Not reasonable enough

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