Sending rate adjusting method in bandwidth detection stage and congestion control algorithm

Abstract

The invention discloses a method for adjusting a sending rate in a bandwidth detection stage and a congestion control algorithm, and the method comprises the steps: firstly increasing the sending ratethrough a speed increasing factor g in a first RTT in the bandwidth detection stage, and then sending a round of data package, so as to carry out the bandwidth detection; judging the congestion condition of the current network according to whether ACK packets of all data packets sent in the round are received within a certain period of time; when the condition of the current network is good, adjusting the acceleration factor of the sending rate according to the current round-trip delay and the historical maximum transmission rate; when the condition of the current network is poor, reducing the sending rate to send a round of data packets, i.e., reducing the sending rate to empty the queue in the second RTT of the bandwidth detection stage; and in the remaining period of the bandwidth detection stage, determining the sending rate according to the real-time transmission rate. The method can give consideration to the transmission efficiency, convergence and fairness.

Description

technical field [0001] The invention relates to a transmission rate adjustment method and a congestion control algorithm in the bandwidth detection stage. Background technique [0002] In recent years, with the huge increase in the number of users and the bandwidth of the network, the emergence of new network and computing technologies, new business applications and business models has put forward new requirements for the performance of the Internet. With the continuous development of network technology, the network support platform has gradually changed from a single service to multiple services; network data transmission has changed from traditional simple data to the current fast-growing cloud computing, online video, mobile Internet and other application modes, which have fundamentally changed the network. traffic model; with the progress of globalization, intercontinental network communication is more frequent. The development trend of the next generation Internet is h...

AI Technical Summary

Problems solved by technology

However, BBR also has some problems. For example, when multiple BBR streams compete for the same bottleneck link, the convergence speed of the throughput rate is very slow; because BBR empties the queue as much as possible and rarely occupies the cache, there is also a gap between it and other protocols. Fairness issues; more importantly, although BBR alternately detects bandwidth and delay, but after entering the stable period, BBR has a period of up to 6 RTTs in the stage of not actively detecting bandwidth. At this stage, it cannot find that there may be free bandwidth of

In the stage of actively detecting bandwidth, BBR's fixed sending rate also has the problem that the sending rate cannot be rapidly increased to the maximum available bandwidth or the growth is too aggressive, which will aggravate the entire network congestion and reduce performance.

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