File transmission method, device and system and electronic equipment

Abstract

The embodiment of the invention provides a file transmission method, device and system and electronic equipment. The file transmission method can be applied to a sending end. The method comprises thesteps of by a preset transmission layer unreliable transmission protocol is adopted, sending data messages to be transmitted to a receiving end through a target interface, wherein the target interfaceis an interface which is determined when TCP connection is established between the target interface and the receiving end and used for transmitting files to be transmitted and the data messages to betransmitted comprise fragmentation data of the files to be transmitted, after it is determined that all the data messages to be transmitted are sent, acquiring fragment loss information, fed back bythe receiving end, of the files to be transmitted, determining to-be-retransmitted fragment data in the fragment data of the files to be transmitted according to the fragment loss information fed backby the receiving end, and sending the to-be-transmitted data message including the to-be-retransmitted fragmented data to the receiving end through the target interface by adopting the transmission layer unreliable transmission protocol. Through the scheme, the waste of network bandwidth resources can be avoided, and the network transmission efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of computer networks, in particular to a file transmission method, device, system and electronic equipment. Background technique [0002] FTP (File Transfer Protocol, File Transfer Protocol) is a standard application layer protocol. In FTP, it is stipulated that the transport layer uses two TCP (Transmission Control Protocol, Transmission Control Protocol) connections to complete the task of file transfer, and one of the TCP connections is used for An interactive control command (such as the file name of the file to be transferred, a file list, etc.), and another TCP connection is used to transmit the data message of the file to be transferred. [0003] As a reliable transmission protocol of the network transport layer, TCP can ensure that the data packets received by the receiving end arrive in an orderly manner, and can automatically handle packet loss and retransmission at the same time. Each time the se...

AI Technical Summary

Problems solved by technology

[0004]However, due to the increasingly complex network environment, the judgment of whether a data message is lost during TCP transmission depends on the confirmation message replied by the receiving end. In a network environment with a low packet loss rate, the confirmation message may also be lost when the receiving end replies to the confirmation message.

If the confirmation message is lost, even if the receiving end successfully receives the data message, the sending end will still think that the data message is lost because it has not received the confirmation message, and will retransmit the data message, resulting in unnecessary data messages Retransmission wastes network bandwidth resources and affects network transmission efficiency

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