Broadcast Signal Transmission Device IP Header Compression
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Solution Overview
Problem
Current digital broadcast systems face inefficiencies in data transmission due to high overhead from IP packet headers, particularly in large data transmissions, which affects data transmission efficiency, network robustness, and mobility of receiving devices.
Innovation Solution
A broadcast signal transmission method that involves generating Internet protocol (IP) packets, fragmenting them if necessary, restoring fragmented packets at the link layer, performing robust header compression, and encapsulating compressed headers into link layer packets for efficient transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If IP packet headers are used for data transmission, then data can be transmitted with standard protocol support, but overhead increases and transmission efficiency decreases
Solution Approach 1:
The patent extracts and removes redundant information from IP packet headers. The header compression device identifies and eliminates duplicate or unnecessary header fields, retaining only essential information for packet identification and routing, thereby reducing overhead while maintaining protocol functionality
Solution Approach 2:
Instead of transmitting complete IP headers as conventionally done, the patent inverts the approach by transmitting only compressed header information and relying on context from previously transmitted packets to reconstruct full headers at the receiver end, turning a potentially wasteful practice into an efficient one
2Loss of information
If complete IP headers are transmitted, then packet information is complete and accurate, but bandwidth consumption increases
Solution Approach 1:
The patent uses copying by transmitting a reference or template of the IP header structure once, and then copying only the varying portions of header information for subsequent packets. The receiver uses the original template combined with the transmitted differences to reconstruct complete headers, reducing bandwidth while preserving information completeness
3Productivity
If header compression is applied, then bandwidth usage is reduced and transmission efficiency improves, but processing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing header templates and compression rules before actual data transmission begins. The system pre-analyzes the header structures that will be transmitted and prepares compression schemes in advance, reducing the computational burden during real-time transmission processing
Data Source
AI summary
A broadcast signal transmission method according to one embodiment of the present disclosure comprises an IP layer processing step of generating Internet protocol (IP) packets including broadcast data and generating fragmented IP packets by fragmenting at least one IP packet of the IP packets in order to transmit to a link layer, a first link layer processing step of restoring the at least one IP packet by combining the fragmented IP packets of the IP packets output at the IP layer processing step, a second link layer processing step of performing header compression of IP packet including the restored at least one IP packet, and a third link layer processing step of encapsulating the header compressed IP packets into at least one link layer packet and transmitting the at least one link layer packet to a physical layer.