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Method and system for realizing transparent transmission of files in CMMB channel

A transparent transmission and file technology, applied in the field of broadcast communication, can solve problems such as undefined directory structure and file data transmission

Inactive Publication Date: 2009-10-28
ACAD OF BROADCASTING SCI SARFT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Existing standards and specifications do not define how the directory structure and file data are transmitted in the channel of the CMMB multiplexing frame in the form of IP / UDP packets

Method used

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  • Method and system for realizing transparent transmission of files in CMMB channel
  • Method and system for realizing transparent transmission of files in CMMB channel
  • Method and system for realizing transparent transmission of files in CMMB channel

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Embodiment Construction

[0034] In the mobile multimedia broadcasting system, the purpose of the file IP transmission scheme is to encapsulate the files and their path structure in a certain directory into the data segment in the multiplexing subframe specified in the CMMB multiplexing standard for transmission, so as to realize the file and path structure. Transparent delivery of structures over mobile multimedia broadcast channels. see image 3 , this figure is the structural diagram of the protocol stack when the file is transparently transmitted in the present invention, the present invention encapsulates the data of the CMMB multiplexing frame defined in GY / T 220.2 by the file and path structure under the catalog to be sent in the form of IP packet The transmission is carried out in the segment, and the front-end encapsulation and terminal reception reconstruction of the path structure and files under the directory to be sent are realized.

[0035] The specific implementation process of the pres...

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Abstract

The invention discloses a method and a system for realizing transparent transmission of files in a CMMB channel. Files and a path structure under an awaiting transmission directory are encapsulated in a data segment of a CMMB multiplex frame defined in the GY / T 220.2 in a mode of IP packet to be transmitted, so that the re-establishment of the front end encapsulation and the terminal receive of the files and the path structure under the awaiting transmission directory is realized, and at the same time, the transmission of other services defined in the GY / T 220.2 is not affected.

Description

technical field [0001] The present invention relates to the field of broadcast communication, in particular to a method and system for realizing transparent transmission of files in a CMMB (China Mobile Multimedia Broadcasting, China Mobile Multimedia Broadcasting) channel. Background technique [0002] The radio, film and television industry standard CMMB channel modulation specification GY / T 220.1 defines that CMMB adopts OFDM (Orthogonal Frequency Division Multiplexing) modulation technology for channel transmission. The CMMB system divides the transmitted data into CMMB channel frames in units of one second, and one second is a CMMB channel frame. [0003] see figure 1 , this figure is a frame structure diagram of a CMMB channel frame in the prior art, as can be seen from the figure, a CMMB channel frame is divided into 40 time slots, each time slot is 25ms, wherein time slot 0 is used to transmit multiplexing frame control information That is, the control information ...

Claims

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Application Information

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IPC IPC(8): H04L29/08H04L29/06
Inventor 尹亚光丁森华朱佩江郭晓霞
Owner ACAD OF BROADCASTING SCI SARFT
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