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Method for smoothly upgrading digital terrestrial television broadcasting system to be of two-way

A technology for digital terrestrial television and broadcasting systems, applied in broadcasting transmission systems, electrical components, selective content distribution, etc., and can solve problems such as low distribution efficiency

Inactive Publication Date: 2011-07-13
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the cellular-based communication system can provide two-way services, its microcellular structure and unicast transmission method have the disadvantage of low distribution efficiency

Method used

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  • Method for smoothly upgrading digital terrestrial television broadcasting system to be of two-way
  • Method for smoothly upgrading digital terrestrial television broadcasting system to be of two-way
  • Method for smoothly upgrading digital terrestrial television broadcasting system to be of two-way

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Embodiment Construction

[0034] The content of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0035] The present invention designs a terrestrial TV two-way system architecture, adopts software radio technology, and designs multiple wireless backhaul methods and physical channel structures, including a backhaul method compatible with GSM / GPRS / EDGE uplink baseband 200KHz bandwidth division channels, and adopts a single Carrier frequency domain processing (including SC-FDE / SC-FDMA / GMC) or Orthogonal Frequency Division Multiplexing OFDM technology 1MHz / 1.6MHz / 1.75MHz / 2MHz and the backhaul method of TV channel bandwidth division channel, designed broadcast communication Converged MAC protocol structure and a method of realizing fusion by reforming broadband communication MAC protocol.

[0036] The main content includes: system architecture design, physical layer design and integrated MAC / MUX design. The detailed design ideas and methods are illustr...

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Abstract

The invention provides a method for smoothly upgrading a digital terrestrial television broadcasting system to be of two-way, which is used for smoothly upgrading the digital terrestrial television broadcasting system into a two-way radio broadcasting communication convergence system. The method comprises the following steps: first, a radio uplink return channel is added for a physical transmission layer, and a radio broadband return policy of a plurality of modes based on a software radio technology is adopted at a base station side, and is realized by adding a return signal receiving module at the base station side; an uplink return channel added at a terminal side and a downlink channel of the original broadcasting system can use a frequency division duplex (FDD) mode or a time division duplex (TDD) mode, when the FDD is adopted, the return channel can utilize an idle FM (Frequency Modulation) / VHF (Very High Frequency) / UHF (Ultra High Frequency) broadcasting frequency band formed by frequency planning and spatial-temporal difference, an authorization-free frequency band and an idle broadcasting television frequency band formed in an analog / digital conversion period, and is realized by adding a return signal transmitting module at a two-way terminal side; and for a media access control layer, interactive service is converged in a media access control MAC and broadcasting multiplex MUX layer.

Description

technical field [0001] The invention relates to the technical field of terrestrial digital television and terrestrial wireless broadband, in particular to the fusion technology of bidirectional terrestrial television network and wireless broadband access, and specifically relates to a method for smoothly upgrading a digital terrestrial television broadcasting system to bidirectional. Background technique [0002] Digital TV broadcasting is mainly realized through three transmission methods: satellite, cable TV and terrestrial wireless. With its unique ability of simple reception and mobile reception, terrestrial wireless broadcasting can meet people's demand for information anytime and anywhere in the modern information society. The digital terrestrial television in the present invention includes a fixed-receiver-oriented set-top box and a mobile-receiving-oriented vehicle-mounted and hand-held terminal, and a terrestrial mobile multimedia broadcasting system or a digital te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04H20/72H04N21/238
Inventor 曾学文倪宏王劲林侯自强
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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