Flow control method, device and system

Abstract

The invention discloses a flow control method, device and system, which are used for realizing flow control in a media stream transmission process between equipment. The method comprises: a first device receives a media stream sent by a second device at a first rate; when the first device determines that the cache occupancy rate rises from a first threshold to a second threshold, the first devicenotifies the second device to send the media stream to the first device at a second rate based on the rate of the media stream detected within a first time period when the cache occupancy rate rises from the first threshold to the second threshold, wherein the second rate being less than the first rate; the second device sends the media stream to the first device at a second rate; when the first device determines that the cache occupancy rate rises from the second threshold value to a third threshold value, the first device notifies the second device to send the media stream to the first device at a third rate based on the rate of the media stream detected in a second time period when the cache occupancy rate rises from the second threshold value to the third threshold value, wherein the third rate is not greater than the second rate; and the second device sends the media stream to the first device at the third rate.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to a flow control method, device and system. Background technique [0002] In a network deployed with switching devices, traffic overload may occur during the transmission of media streams between devices. Traffic overload will lead to problems such as discarding data packets, delaying data transmission, reducing the effective throughput of the network, and consuming more resources for caching and retransmitting data. Therefore, it is very important to solve the problem of traffic overload in the network. [0003] In order to solve the traffic overload problem, a traffic control scheme based on a pause (PAUSE) frame is currently proposed. In this solution, the receiver device instructs the sender device to suspend sending media streams to the receiver device through a PAUSE frame when traffic overload occurs, and the sender device suspends sending media streams...

AI Technical Summary

Problems solved by technology

In this solution, the receiver device instructs the sender device to suspend sending media streams to the receiver device through a PAUSE frame when traffic overload occurs, and the sender device suspends sending media streams according to the instruction of the PAUSE frame, causing the sender device to be caught off guard and excessive packets are dropped

Taking the sending device as an intermediate device on the media stream transmission link as an example, after the sending device suspends sending media streams to the receiving device according to the instruction of the PAUSE frame of the receiving device, the sending device will continue to receive the data sent by the upstream device. media stream, which will cause the buffer area of ​​the sending device to overflow, and the sending device will discard the data packets received from the upstream device

[0004] To sum up, the existing flow control schemes have the problem that when the receiving device is overloaded with traffic, the sending device stops sending media streams to the receiving device, causing the sending device to discard data packets.

Images