Mobile terminal oriented multimedia broadcasting system and implementing method thereof

A technology for multimedia broadcasting and mobile terminals, which is applied to the multimedia broadcasting system oriented to mobile terminals and its implementation field, can solve the problems of uneconomical, waste of frequency resources, limited frequency resources of mobile communication systems, etc.

Inactive Publication Date: 2005-01-26
TSINGHUA UNIV
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

However, none of these digital TV broadcasting-oriented standards has solved the problem of how to provide multimedia services for mobile terminals, especially portable mobile terminals.
[0004] Both the second-generation digital mobile communication system and the future third-generation mobile communication system can provide a certain degree of multimedia transmission, but due to the limited frequency resources allocated to the mobile communication system, for the transmission of multimedia information with a large amount of data, mobile communication The network transmission needs to waste a lot of spectrum resources, and requires various technical solutions to ensure quality under low power, which is a very unec

Method used

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  • Mobile terminal oriented multimedia broadcasting system and implementing method thereof
  • Mobile terminal oriented multimedia broadcasting system and implementing method thereof
  • Mobile terminal oriented multimedia broadcasting system and implementing method thereof

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Embodiment Construction

[0095] Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described as follows.

[0096] The hierarchical structure diagram of the multimedia broadcasting system proposed by the present invention is as attached figure 2 As shown, it includes application layer, coding layer, link layer, transport layer and air interface. Wherein, an air interface is used between the broadcast node (BP) at the transmitting end and the portable mobile terminal at the receiving end.

[0097] In the application layer, the present invention is characterized in that the program production center can design special programs for the mobile multimedia broadcasting system. The program production of the application layer can be completed by using a high-performance workstation and some special interface circuits according to the characteristics of the program source. These programs are generally short in length, usually several minutes to tens of minutes...

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Abstract

This invention is a multimedia broadcasting system and its realizing method that facing mobile terminal. It belongs to multimedia broadcasting field. Its feature is that it is based on orthogonal frequency division multiplexingí¬multiple channel system. multiple broadcasting service is provided to mobile terminal by the IFFT of emission terminal and the FFT of receive terminal. The transformation is done by allocating different channels on different sub carrier wave groups by using the frequency range of existing common television broadcasting system and big zone broadcasting type. It can provide media program of scores of channels efficiently and economically, and the utility factor is high. Individualization broadcasting can be realized for different quality needs subscriber. Dynamic power control, modulation, forward error correction encoding and frequency hopping can be realized to ensure the transmission quality. The receive terminal can be simply design and the power consumption can be reduced in this invention.

Description

technical field [0001] The mobile terminal-oriented multimedia broadcasting system and its implementation method belong to the intersecting field of TV broadcasting and wireless multimedia communication technology, and particularly relate to a multimedia broadcasting system that utilizes existing network resources and frequency bands of TV broadcasting for transmission, mainly for mobile terminals to provide Inexpensive multimedia broadcasting service. Background technique [0002] In modern wireless transmission systems, TV broadcasting, mobile communication systems, and the new generation of wireless local area networks (WLAN) can all provide a certain degree of multimedia information services, but due to the large amount of data in multimedia information, sensitivity to channel errors, etc. , there have always been some problems in multimedia transmission systems for mobile terminals. [0003] The analog TV broadcasting system is the earliest multimedia transmission syst...

Claims

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Application Information

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IPC IPC(8): H04J11/00H04N7/24
Inventor 陆建华陈为刚匡麟玲
Owner TSINGHUA UNIV
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