FEC Encoding for Packet Reconstruction in Communication Systems
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Solution Overview
Problem
In communication systems, data congestion due to high-definition and ultra-high-definition content transmission leads to packet loss, causing deterioration in audio and video quality, and existing methods like B-frame dropping and Application Layer-Forward Error Correction (AL-FEC) are insufficient in addressing packet loss effectively.
Innovation Solution
A method and apparatus that generate drop information for source packets, perform Forward Error Correction (FEC) encoding to create repair packets, and transmit these packets to reconstruct lost data, ensuring reliable content delivery even in packet drop situations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If data is transmitted in high definition and ultra high definition, then content quality is improved, but packet loss increases due to network congestion
Solution Approach 1:
The patent applies Forward Error Correction (FEC) encoding to source packets before transmission to generate repair packets. This preliminary action creates redundant data that enables the receiver to reconstruct lost packets without requiring retransmission, thereby maintaining content quality while improving packet delivery reliability in congested networks
Solution Approach 2:
The patent changes the parameter of packet structure by adding FEC-encoded repair data to source packets. This parameter change transforms ordinary source packets into packets with built-in error correction capability, allowing the system to maintain high definition content quality while protecting against packet loss through embedded redundancy
2Productivity
If packet drop is used to reduce network load, then network throughput is improved, but packet loss increases
Solution Approach 1:
The patent applies FEC encoding to source packets before transmission to generate repair packets. This preliminary action creates redundant data that enables the receiver to reconstruct lost packets without requiring retransmission, thereby maintaining content quality while improving packet delivery reliability in congested networks
Solution Approach 2:
The patent converts the harmful effect of packet loss into a benefit by using FEC encoding to generate repair packets. The repair packets contain redundant information that transforms lost source packets into recoverable data, turning the previously harmful packet loss into an opportunity for error-free reconstruction and improved reliability
3Reliability
If AL-FEC is applied to restore packet loss, then packet reconstruction capability is improved, but device complexity increases
Solution Approach 1:
The patent merges the source packet data with FEC-encoded repair data into a unified packet structure. This combining of original and redundant data into single packets simplifies the transmission process and reduces device complexity by eliminating the need for separate repair packet transmission while maintaining robust packet reconstruction capability
Data Source
AI summary
The present invention relates to a method for transmitting a packet in a communication system, the method comprising: generating drop information indicating at least one source packet to be dropped among source packets to be transmitted and whether or not to drop each of the other source packets except the at least one source packet; performing forward error correction (FEC) encoding on the drop information and the other source packets except the at least one source packet; generating a repair packet comprising repair data for restoring the drop information and a repair symbol for restoring the other source packets except the at least one source packet; and transmitting the other source packets except the at least one source packet and the repair packet.