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

A technology of digital terrestrial television and broadcasting system, applied in the direction of broadcasting transmission system, electrical components, selective content distribution, etc.

Inactive Publication Date: 2012-10-17
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Summary
  • 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

[0039] The content of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0040] 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.

[0041] 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 smooth upgrade method of 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 present invention involves the field of digital TV and ground wireless broadband technology. It is particularly aimed at the two -way and wireless broadband access technology of ground television networks, and it involves a two -way smooth and smooth upgrade method of a digital ground TV broadcast system. Background technique [0002] Digital TV broadcasts are mainly achieved through three transmission methods such as satellites, line TV and ground wireless.The ground wireless broadcasting with its unique simplicity and mobile receiving capabilities can meet the demand for information anytime and anywhere in modern information society.The digital ground TV described in the present invention includes a ground mobile multimedia broadcast system or digital ground TV system that contains a set -top box for fixed receiving machine and a mobile terminal, and a handheld terminal. [0003] At present, three major ground digital TV broadcast transmission standa...

Claims

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Application Information

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