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Digital interactive multimedia network system and data transmission method therewith

A data transmission method and network system technology, applied in the field of digital interactive multimedia network system and data transmission, can solve the problem of unpredictable cooperation between the main transmitter and the local transmitter, etc.

Inactive Publication Date: 2004-09-22
TIMI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To further improve coverage, broadcasting can use the so-called "gap filler" method of transmitting the same signal in coverage holes (where signal strength is weak), but it cannot be predicted to what extent the main transmitter and the local transmitter can cooperate

Method used

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  • Digital interactive multimedia network system and data transmission method therewith
  • Digital interactive multimedia network system and data transmission method therewith
  • Digital interactive multimedia network system and data transmission method therewith

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0073] Several feasible technical embodiments are proposed below.

[0074] Spectrum allocation:

[0075] Figure 4 A scenario for spectrum allocation is shown: Class A spectrum will be allocated first, for broadcasting services. Typical Class A channels are 8MHz, and some of these channels will be used as digital TV broadcast channels. Two-way channels need to be added according to interactive services and two-way communication. can be as Figure 4 Allocate 12 blocks (96MHz) of high-end spectrum for two-way communication, this allocation can realize the networked two-way micro-cellular broadband system. The lower end of the spectrum, which is more suitable for transmission, is reserved for macro coverage area broadcasting. The guard band around 40MHz protects the two-way network from the interference of the broadcast network.

[0076] One implementation is that tower-to-user (downlink) and user-to-tower (uplink) communications are implemented in TDD (time division duplex...

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PUM

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Abstract

A data interactive mode multimedia network and data transmission method by utilizing this network, comprises two stages network collaboration. The main feature is that the network includes: a first stage network comprising the macro overlay networks, having high transmission power, used for one-way broadcasting; a second stage network comprising micro overlay networks, formed by cellular, used for broadcasting and two-way communication. This network allows seamless transition from basic broadcasting service to premium grade two-way wide band service; according to needs of traffic application and the difference of network size. The first network can be configured based on multi mode, running on the other one frequency range, according to the feature of cellular and two-way communication service. The second network has the different parametric combination being selected and configured. The broadcasting service of This network expands on the macro overlay networks, the two-way communication service starts to run based on the establishment of cellular network.

Description

technical field [0001] The present invention relates to a digital interactive multimedia network system and a data transmission method utilizing the system, in particular, the present invention relates to a digital interactive system with a two-stage transmission layer structure consisting of a macro coverage network and a micro cellular structure micro coverage network A multimedia network system and a data transmission method using the system. Background technique [0002] The future terrestrial wireless TV network will be a unified platform that can simultaneously send high-definition TV, interactive programs and broadband two-way multimedia services. Due to the strict limitations of wireless transmission in terms of bandwidth, power and cost, and the increasingly diverse needs of end users, an air interface that can make the most efficient use of spectrum resources (including networking, modem, etc.) Optimal design becomes the most important requirement. [0003] Due t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L12/28H04L12/46H04L29/02H04N7/173
Inventor 刘辉王联邢观斌沈温源杨庆华
Owner TIMI TECH
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