Data transmission method and device

Abstract

The embodiment of the invention provides a data transmission method and device. The method comprises the following steps: determining a first sending rate according to a network performance target offirst data and a network state of a transmission control protocol (TCP) connection, wherein the first TCP connection is used for sending the first data; and sending the first data according to the first sending rate. By setting the network performance target, the output of the decision not only depends on the network state, but also depends on the network performance target, the network congestioncontrol is more flexible, and the TCP-based data transmission efficiency is improved.

Description

technical field [0001] The embodiments of the present application relate to the field of communication technologies, and in particular, to a data transmission method and device. Background technique [0002] As the number of Internet users increases, the problem of network congestion becomes more and more serious. The Lawrence Berkeley National Laboratory of the University of California proposed a congestion avoidance mechanism in 1988, which uses a sliding window model for transmission control. The size of the sliding window refers to how much buffer the receiver can use to receive data. The sender can determine the maximum amount of data that can be sent through the size of the sliding window. In addition, when the load loaded on the network exceeds its processing capacity, congestion will occur, such as figure 1 As shown, the capacity of the network limits the maximum amount of data that the sender can send. Therefore, the sender always maintains two window sizes: the...

AI Technical Summary

Problems solved by technology

In the face of high-bandwidth, high-latency and dynamically changing network scenarios, the congestion control mechanism strategy of the traditional TCP protocol is fixed, which is only suitable for specific network scenarios or traffic distribution, and cannot dynamically adjust the size of the sending window according to the large idle bandwidth; in addition , commonly used indicators to measure network performance, such as available bandwidth, throughput, delay, packet loss rate, etc., dynamically change according to network status, especially the network status that can be obtained in the case of a large round trip time (RTT) With limited information, it is impossible to obtain the congestion status and available bandwidth information of the path in time, and it is difficult to accurately model and determine the optimal sending rate

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