Concatenated RS-Turbo Coding for 4G Backhaul BER Reliability

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Solution Overview

Problem

The increasing demand for high-speed connections in 4G wireless networks strains backhaul networks, requiring more efficient Bit-Error-Rate (BER) performance to support enhanced broadband connections and multimedia applications, which existing technologies have not adequately addressed.

Innovation Solution

The implementation of error control coding mechanisms using Reed-Solomon (RS) coding and turbo coding, combined with Cyclic Redundancy Check (CRC) parity bits, to provide forward error correction in backhaul applications, leveraging existing LTE hardware for efficient BER performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional TDM transport is used in 2G and 3G networks, then network infrastructure is maintained, but BER performance is insufficient to support 4G mobile networks

Engineering Contradiction:

ImproveBER performanceVSAvoidtransport architecture

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent changes the fundamental parameters of the transport system by transitioning from TDM to packet transport architecture, and implements concatenated error correction coding (RS(255,239) outer code with inner code) to achieve BER performance of 10^-6 or better, supporting 4G network requirements

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses composite error correction by combining Reed-Solomon outer coding with inner coding (convolutional or turbo code), creating a layered error protection structure that achieves superior BER performance compared to single coding schemes

Inventive Principle:

Principle #40Composite materials

2Productivity

If packet transport is implemented to support higher data rates, then data rate capacity increases, but error correction requirements increase

Engineering Contradiction:

Improvedata rateVSAvoiderror correction capability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent segments the error correction function into two independent layers: outer Reed-Solomon coding that handles burst errors and packet structure protection, and inner coding that handles random bit errors, allowing each layer to optimize for its specific error type while supporting high data rates

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies preliminary error correction by adding Reed-Solomon parity bits to packets before transmission, creating a protective layer that can correct errors without requiring retransmission, thereby enabling higher effective data rates

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20230163787A1Forward error control coding

Publication Date: 2023.05.25 TEXAS INSTRUMENTS INC

AI summary

A system and method for providing error control coding for backhaul applications are disclosed. Data is first encoded using Reed-Solomon (RS) coding. The output RS blocks are then turbo coded. The size of the output RS blocks is selected to match the input of the turbo encoder. The bits from the RS blocks may be interleaved to create the input turbo blocks. Cyclic Redundancy Check (CRC) parity bits may be added to the data prior to RS coding.