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A single frequency network broadcasting and receiving method based on physical layer channel

A physical layer channel and physical layer sub-channel technology, applied in the field of digital information transmission, can solve the problem of being unable to provide different local service information to users in different regions

Active Publication Date: 2015-08-12
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a single frequency network broadcasting and receiving method based on a physical layer channel, which is used to solve the technical problem that different local service information cannot be provided for users in different regions in the prior art

Method used

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  • A single frequency network broadcasting and receiving method based on physical layer channel
  • A single frequency network broadcasting and receiving method based on physical layer channel
  • A single frequency network broadcasting and receiving method based on physical layer channel

Examples

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Embodiment 1

[0061] This embodiment provides a method for broadcasting a single frequency network based on a physical layer channel, which is further described as:

[0062] 1) Each base station divides the physical layer channel only at the symbol level to obtain public channels and local channels, and the basic unit of each channel is a symbol.

[0063] The division method of the physical layer channel at the symbol level, specifically: in the physical layer channel, the ratio is α 1 The symbols of are assigned to the common channel with a ratio of α 2 The symbols of are assigned to the local channel, where α 1 +α 2 =1. The common channel or the local channel only includes part or all symbols of the physical layer channel.

[0064] 2) Each base station only divides the public channel or local channel again at the symbol level to obtain physical layer sub-channels based on the symbol level.

[0065] The division method of the public channel or the local channel at the symbol level, sp...

Embodiment 2

[0068] This embodiment describes a method for broadcasting a single frequency network based on a physical layer channel. is further described as:

[0069] 1) Each base station divides the physical layer channel at the bit level to obtain public channels and local channels, and the basic unit of each channel is a bit.

[0070] The division method of the physical layer channel at the bit level is as follows: the symbol resource transmitted in the physical layer channel is regarded as a dimension, which is called the symbol dimension here, and the multiple bits in each symbol are regarded as another dimension, This is referred to herein as the bit dimension. P in the physical layer channel 1 (P 1 is a positive integer) symbols as a whole, combined with the symbol dimension and the bit dimension, the physical layer channel is segmented at the bit level, and some bits belong to the common channel, and the remaining bits belong to the local channel. Wherein, the public channel o...

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Abstract

The invention discloses a single frequency network broadcasting method based on physical layer channels. The method is characterized by comprising the following steps of: S110, segmenting the physical layer channel of each base station into a public channel and a local channel; S120, broadcasting and transmitting public service information by the public channels; and S130, broadcasting and transmitting local service information by the local channels. According to the method, the public service information is broadcasted through each base station by using partial resources of the physical layer channel, and the local service information required by surrounding users is broadcasted by using the rest resources, so the problem that different local service information cannot be provided for the users of different regions in the prior art is solved on the basis that the public information is broadcasted.

Description

technical field [0001] The invention relates to the technical field of digital information transmission, in particular to a single frequency network broadcasting and receiving method based on a physical layer channel. Background technique [0002] In traditional analog TV broadcasting, in order to cover a certain area, adjacent transmitting stations need to use different frequencies (or channels) to avoid mutual interference, and the same frequency must be multiplexed at a certain distance. This method is called Multi-frequency network (Multi-Frequency Network, MFN) method. In the multi-frequency network mode, due to frequency multiplexing, broadcasting one signal to achieve wide coverage needs to occupy several times the bandwidth of the signal, resulting in a serious waste of spectrum resources. [0003] With the development of broadcasting technology, TV broadcasting has entered the era of digital TV broadcasting. Among them, terrestrial digital TV broadcasting has the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/06H04W16/04
Inventor 宋健金黄平彭克武程涛杨知行
Owner TSINGHUA UNIV