Mobile terminal oriented multimedia broadcasting system and implementing method thereof

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...

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 uneconomical solution.

[0013] ■The system based on the DVB-H standard only rebroadcasts DVB-T TV programs, which greatly affects the scope of its service users, and it is difficult to guarantee the ratings

[0014] ■DVB-H will cause a waste of resources. If the digital terrestrial television network (DVB-T) is used for transmission, it will cause a waste of frequency resources; if a mobile network such as UMTS is used, it will bring great resource management problems to the mobile network. challenge

[0015] More importantly, there are currently many sets of incompatible digital TV broadcasting standards in the world. China is launching its own digital TV broadcasting standard. DVB-H cannot provide a universal service at all.

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