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Raptor code based large file transmission method

A transmission method and large file technology, which is applied in the field of large file transmission based on Raptor code, can solve the problem of lack of good support for large file transmission, and achieve the effects of reducing header overhead, improving transmission efficiency, and optimizing adjustments

Active Publication Date: 2014-10-15
COMMUNICATION UNIVERSITY OF CHINA
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Problems solved by technology

[0005] The introduction of Raptor codes in large file transmission can effectively improve transmission efficiency, but the original design of Raptor codes is only for small files (generally no more than 10MB, such as picture files in wireless data multicast services, etc.), for large file transmission Lack of good support, so it is necessary to modify and optimize the encoding algorithm accordingly, and adopt a suitable transmission control strategy to improve the transmission reliability and transmission efficiency of large file transmission

Method used

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  • Raptor code based large file transmission method
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  • Raptor code based large file transmission method

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Embodiment Construction

[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but the present invention is not limited in any form. Based on the embodiments of the present invention, other embodiments obtained by persons of ordinary skill in the art through several modifications and improvements without creative efforts all belong to the protection scope of the present invention.

[0027] figure 1 It is a schematic diagram of the connection of each transmission node involved in the present invention, wherein the sending end performs one-way transmission to one or more receiving nodes, broadcasting is used for transmission in satellite transmission and terrestrial wireless transmission, and UDP protocol is used in the Internet For multicast or unicast transmission, it should be noted that in other two-way channels, even if there is a return channel from the receiving end to the sending end, reliable connection met...

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Abstract

The invention discloses a raptor code based large file transmission method. According to the raptor code based large file transmission method, according to transmission characteristics of large files, the files to be transmission are subjected to partitioning processing and pre-coding by means of raptor codes, head information is re-designed, and transmission of the files with the capacity of 1000GB at the most can be supported by means of the 8-bit head information. According to the raptor code based large file transmission method, by means of a dynamic transmission redundancy generation mechanism, real-time dynamic regulation is performed according to changes of channels; the influence of channel delay and channel packet loss probability on large file transmission in a bidirectional feedback channel is eliminated, and transmission stability and efficiency of large files are improved.

Description

technical field [0001] The invention relates to a large file transmission method in the field of communication technology, in particular to a large file transmission method based on Raptor codes. Background technique [0002] As the basic form for people to store and exchange data, files have undergone several important changes with the continuous development of multimedia technology. The content has changed from text and pictures to audio and video, and the quality has changed from low resolution to high resolution. , The capacity has changed from small files to large files. As a result, the demand for exchanging large-capacity files such as high-definition pictures and video and audio is increasing day by day. Different from the transmission of small files, the transmission of large files (generally refers to files with a capacity of more than 1GB) has a significantly increased chance of being interfered by channel errors, and due to the long waiting time for transmission,...

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Application Information

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IPC IPC(8): H04L29/08H04L1/00H04L1/12
Inventor 王非非王剑沈向辉徐伟掌杨占昕
Owner COMMUNICATION UNIVERSITY OF CHINA
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