Method and device for sending and receiving on-line files of instant messaging tool

Abstract

The invention discloses a method and device for sending and receiving on-line files of an instant messaging tool. All of modules between a sending end application layer Raptor encoder and a receiving end application layer Raptor decoder are erasure channels having certain packet loss rate. A sending method comprises the steps of 1.1, packing and encapsulating file data to be sent into a plurality of data packages, performing Raptor code encoding in a sending application layer with a data package as a unit, loading a cyclic redundancy code (CRC) and transmitting the CRC to a sending end transport layer; 1.2, performing user datagram protocol (UDP) conversion in transport layer and then transmitting the CRC to a physical layer; and 1.3, performing channel coding and modulation of the data packages in the physical layer and then transmitting the CRC to a network channel. The invention further discloses a method for receiving the on-line files of the instant messaging tool and a system for receiving the on-line files of the instant messaging tool. Compared with QQ and other instant messaging tools, the method, device and system for receiving the on-line files of the instant messaging tool improves the file transmission speed by 30% or more than 30%.

Description

technical field [0001] The invention relates to the field of network technology, in particular to an instant messaging tool online file sending and receiving method and device. Background technique [0002] Instant Messaging (IM for short) refers to a communication method that enables online parties to chat, communicate, and send and receive Internet messages in real time through instant messaging technology. Since ICQ, the first instant messaging software released by Mirabilis in 1996, especially with the rapid development of application software in recent years, the functions of instant messaging have become increasingly rich, gradually integrating email, file transfer, music, TV, e-commerce, Various functions such as games and search. [0003] According to CNNIC's 24th "Statistical Report on Internet Development in China", the utilization rate of instant messaging services among Chinese netizens reached 72.2%, making it the third largest online service after online music...

AI Technical Summary

Problems solved by technology

[0010] Therefore, the speed of file transfer using QQ is faster than that of other instant messaging software, but this does not mean that the file transfer method of QQ is a perfect solution, even if QQ can switch the TCP protocol to With the UDP protocol, the file transfer speed can be improved, but due to the unreliability of the UDP protocol, the file transfer has no reliability guarantee.

[0011] Based on the analysis of the above transfer protocols, it can be seen that the traditional instant messaging software does not have a transfer protocol that can guarantee the reliability of file transfer like the TCP protocol and the file transfer rate like the UDP protocol for online file transfer.

Images