Data transmission method, equipment and system

Abstract

The invention discloses a data transmission method. The data transmission method comprises the steps of transmitting N heartbeat packets to data transmission equipment one by one through a UDP (User Datagram Protocol) link, wherein N is larger than or equal to 1 and the data transmission equipment immediately feeds back the heartbeat packet after the heartbeat packet is received at each other; receiving the N heartbeat packets fed back by the data transmission equipment one by one through the UDP link; judging whether the fed-back N heartbeat packets are overtime or not; if the fed-back N heartbeat packets are not overtime, transmitting a command of closing a TCP (Transmission Control Protocol) link to the data transmission equipment; closing the TCP link for data transmission with the data transmission equipment; conducting data transmission with the data transmission equipment through the UDP link. The invention further discloses other two data transmission methods, data transmission equipment, data receiving equipment and a data transmission system. By adopting the embodiment of the invention, on the basis that high-quality data transmission is guaranteed, the network flow and the system load are reduced.

Description

technical field [0001] The present invention relates to the technical field of the Internet, in particular to a data transmission method, device and system. Background technique [0002] In the prior art, instant messaging usually uses a TCP connection. For example, in online games, a TCP connection is usually used between the client and the server to communicate with each other, but if the client opens Thunder, or other machines on the same LAN as the client open Thunder or other download software, it will greatly affect the network. The network fluency of the game. According to actual statistical data, in online games, when TCP connections are used, the disconnection rate of the client is about 30%-40%. This is caused by TCP's active avoidance mechanism. The TCP active avoidance mechanism is specifically: after the first network abnormality (such as packet loss) is discovered at the network layer, the TCP mechanism will actively reduce its own network rate. For example...

AI Technical Summary

Problems solved by technology

Therefore, when the TCP connection is used between the client and the server, when the network quality is unstable (for example, if the network quality is suddenly poor and then recovered again), the time for TCP to try to retransmit will wait for a long time. cause the client to go offline

[0003] Some applications or software will use the UDP connection to send data, but the server using the UDP connection will not return a confirmation response after receiving the data, so the UDP connection is not reliable

In addition, some software such as firewalls will limit the flow of UDP connections. Therefore, when the UDP connection is used to transmit a lot of data, the flow will be limited, resulting in insufficient data transmission, increased dropout rate, and even interruption of data transmission.

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