Physical Layer Frame Preamble Time Synchronization

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Solution Overview

Problem

Efficient transmission of time and other information in broadcasting schemes like ATSC3.0 is required to synchronize transmitting and receiving sides, while also ensuring efficient transmission of overhead information.

Innovation Solution

A transmission device and method that generate and transmit physical layer frames with preambles containing time information, and BaseBand frames with order information, allowing for efficient synchronization and processing of time and order data.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If time information is transmitted in the payload of physical layer frames, then synchronization between transmitting and receiving sides can be achieved, but transmission efficiency is reduced due to increased overhead

Engineering Contradiction:

ImprovesynchronizationVSAvoidtransmission efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent segments the time information transmission by placing it in the preamble portion of the physical layer frame rather than in the payload. This segmentation allows time information to be transmitted separately from the main data, enabling receivers to extract synchronization data without processing the entire payload, thus improving transmission efficiency while maintaining synchronization reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements preliminary action by including time information in the preamble, which is processed before the payload. This allows the receiver to perform synchronization operations in advance, before main data processing begins, thereby improving overall transmission efficiency without compromising synchronization accuracy.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If overhead information is transmitted with each frame, then necessary control and synchronization data can be provided, but the amount of transmitted data increases

Engineering Contradiction:

Improvecontrol and synchronizationVSAvoidamount of transmitted data

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent extracts time information from the payload and places it in the preamble, separating overhead information from main data. This extraction reduces the amount of data that requires full processing at the receiver, as the preamble can be processed independently and more efficiently, thereby reducing the effective transmission burden while maintaining necessary control functions.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent applies local quality by giving the preamble a specialized function for carrying time information, distinct from the payload's data-carrying function. This localization of function allows the receiver to process only the relevant portion (preamble) for synchronization purposes, reducing overall processing requirements while maintaining comprehensive control capabilities.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11451315B2Transmission device, transmission method, reception device, and reception method

Publication Date: 2022.09.20 SATURN LICENSING LLC

AI summary

The present technology relates to a transmission device, a transmission method, a reception device, and a reception method that permit efficient transfer of time and other information.The transmission device generates a physical layer frame having preambles and a payload that includes, in the preamble, time information representing time of a given position in a stream of physical layer frames and transmits the physical layer frame. The reception device receives the physical layer frame and performs processes using time information. The present technology is applicable, for example, to IP packet broadcasting.