Sending method and receiving method of physical frame

A technology of a sending method and a receiving method, applied in the field of broadcasting systems, can solve the problems of difficult real-time data transmission for PLP data services, and achieve the effects of being beneficial to real-time transmission, saving waiting time delay, and having good real-time performance.

Active Publication Date: 2019-02-26
SHANGHAI NAT ENG RES CENT OF DIGITAL TELEVISION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The problem solved by the present invention is that the PLP data service in the existing DVB-T2 broadcasting system is difficult to be applied to the real-time transmission of data

Method used

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  • Sending method and receiving method of physical frame
  • Sending method and receiving method of physical frame
  • Sending method and receiving method of physical frame

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Embodiment Construction

[0020] The inventor finds that the PLP data service in the existing DVB-T2 broadcasting system is difficult to apply to real-time data transmission.

[0021] In view of the above problems, the inventor provides a method of sending and receiving physical frames after research. At the sending end, the second type of data source is processed in a simpler way than the first type of data source, so that this type of data Sources are better suited for streaming real-time data. At the receiving end, the second type of data source can be quickly demodulated according to the modulation signaling in the received physical frame, so that when the system supports two-way communication, the uplink configuration parameters provided by the second type of data can be used. Establish uplinks and better synchronization between transmitters and receivers that support two-way communication.

[0022] In order to make the above objects, features and advantages of the present invention more comprehe...

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Abstract

Disclosed are a sending method and a receiving method for a physical frame. The sending and receiving methods comprise: receiving a first type data source and a second type data source, wherein the second type data source includes indication information of uplink configuration parameters; dividing the received second type data source into second type baseband frames; performing coding, constellation mapping and coordinate rotation of the second baseband frames to obtain second type to-be-framed data; determining time-frequency resource modules distributed to the second type to-be-framed data in the physical frame according to modulation signaling; filling the second type to-be-framed data into the time-frequency resource modules, and filling a first type to-be-framed data into the unoccupied time-frequency resource modules to form all data signals of the physical frame; setting the modulation signaling in a pre-pilot signal of the physical frame; and sending the physical frame to a receiving terminal. The technical scheme solves the technical problem that a PLP data service in a DVB-T2 broadcasting system in the prior art is relatively difficult to be applied to real-time data transmission.

Description

technical field [0001] The invention relates to the field of broadcast systems, in particular to a method for sending and receiving a physical frame. Background technique [0002] DVB-T2 is the second generation European digital terrestrial television broadcasting transmission standard. Compared with DVB-T, one of the main improvements of DVB-T2 is to support physical layer multi-service functions, including the introduction of the concept of physical layer grouping (Physical Layer Pipe, PLP), multiple PLP data services are time-division multiplexed at the physical layer Use the entire physical channel. [0003] In the prior art, when multiple PLP data services are transmitted in one DVB-T2 frame, a scheduler is needed to complete resource allocation for multiple PLP data services. For example, first fill in the common PLP data service (Common PLP) in the data symbol part of a physical frame, then fill in the PLP data service of type 1, and then fill in the PLP data servic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L1/00
Inventor 张文军郭序峰何大治赵杰杨帆
Owner SHANGHAI NAT ENG RES CENT OF DIGITAL TELEVISION
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