Forward Error Correction Code Conversion Without Decode-Reencode Delay

Solution Overview

Problem

The existing forward error correction (FEC) code type conversion process in data transmission increases delay and power consumption, affecting efficiency, especially when adapting to high-rate and long-distance data transmission requirements.

Innovation Solution

A method and apparatus that simplify FEC code type conversion by concatenating multiple FEC code types, allowing direct encoding and decoding without initial decoding, thereby reducing delay and power consumption, and improving transmission efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If FEC code type conversion is performed by decoding and re-encoding, then higher-gain FEC code type can be achieved, but delay and power consumption increase

Engineering Contradiction:

ImproveFEC code gainVSAvoidconversion delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-calculating and storing mapping relationships between different FEC code types in a lookup table. When code type conversion is needed, the system directly queries the pre-computed mapping table rather than performing real-time decoding and re-encoding, thus achieving high-gain FEC conversion without the associated delay and power consumption penalties.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If FEC code type conversion is performed by decoding and re-encoding, then higher-gain FEC code type can be achieved, but power consumption increases

Engineering Contradiction:

ImproveFEC code gainVSAvoiddevice power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent applies preliminary action by pre-calculating and storing mapping relationships between different FEC code types in a lookup table. When code type conversion is needed, the system directly queries the pre-computed mapping table rather than performing real-time decoding and re-encoding, thus achieving high-gain FEC conversion without the associated delay and power consumption penalties.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If concatenated FEC code is used, then error correction capability is improved, but device complexity increases

Engineering Contradiction:

Improveerror correction capabilityVSAvoidencoding complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by pre-calculating and storing mapping relationships between different FEC code types in a lookup table. When code type conversion is needed, the system directly queries the pre-computed mapping table rather than performing real-time decoding and re-encoding, thus achieving high-gain FEC conversion without the associated delay and power consumption penalties.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12166580B2Data transmission method and apparatus with forward error correction code type conversion

Publication Date: 2024.12.10 HUAWEI TECH CO LTD

AI summary

In a data transmission method, a first chip receives a first data stream sent by a second chip, where the first data stream is a data stream obtained through encoding by using a first forward error correction (FEC) code type; and the first chip encodes the first data stream at least once, to obtain a second data stream, where the second data stream is a concatenated FEC code stream obtained through encoding by using at least the first FEC code type and a second FEC code type.