Data file receiving method and device in mobile multimedia broadcasting system

Abstract

The invention provides a data file receiving method in a mobile multimedia broadcasting system. The method comprises the following steps of: A, receiving a File Attribute Table (FAT) of the periodic broadcast of a server by a terminal, when the preset condition is satisfied, judging whether the FAT is completely received, if so, executing a step C, otherwise, requesting missing FAT fragments from the server, and executing a step B; B, receiving the missing FAT fragments returned by the server by a terminal; C, receiving a file of the periodic broadcast of the server by a terminal, when the preset condition is satisfied, judging whether the file is completely received, if so, ending the processing, otherwise, requesting missing file fragments from the server; and D, receiving the missing file fragments returned by the server by a terminal. The invention simultaneously discloses a terminal and a server. By using the scheme of the invention, the receiving time of the data file can be reduced so as to further improve the user experience.

Description

technical field [0001] The invention relates to mobile multimedia broadcasting (CMMB) technology, in particular to a data file receiving method, terminal and server in the mobile multimedia broadcasting system. Background technique [0002] CMMB is a mobile TV technology independently developed by my country. According to the basic principles of "integration of space and ground, combination of satellite and network, unified standards, and nationwide roaming", a mobile multimedia broadcasting network covering the whole country and a unified operating mechanism are established. The network provides point-to-point radio and television programs to mobile phones, personal digital assistants (PDAs), moving image expert compression standard audio level 3 (MP3), MP4, digital cameras, notebook computers, and small receiving terminals on vehicles and ships. [0003] In the existing CMMB system, when broadcasting data files, the server at the front end of broadcasting will send the file...

AI Technical Summary

Problems solved by technology

[0011] Due to the instability of wireless transmission, in practical applications, the payload part of the XPE unit may be damaged, correspondingly, it will cause the subsequent CRC check to fail, and then cause the FAT chip encapsulated in the payload part of the XPE unit to be damaged. and / or file slices are discarded, making the FAT table and / or files received by the terminal incomplete

In this way, the terminal needs to receive the FAT table and / or file again in the next broadcast cycle, if it cannot be completely received, it will continue to receive in the subsequent broadcast cycle until it is completely received, which will cause the receiving time of the data file to be extended (When the file is large and the broadcast period is long, it is more obvious), which in turn leads to a decline in user experience

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