Component Carrier Bandwidth Extension for Backward-Compatible OFDMA

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Solution Overview

Problem

Existing MIMO communication systems face limitations in achieving higher data rates and reliability due to inadequate transmission bandwidths, particularly in cellular networks using orthogonal frequency division multiple access (OFDMA), necessitating improvements in bandwidth extension for enhanced performance.

Innovation Solution

A transmitter and receiver system that supports a bandwidth extension over multiple component carriers, incorporating mechanisms for control information transmission and reference signals, allowing for increased system bandwidth through joint or separate extensions of component carriers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If bandwidth extension is implemented over multiple component carriers, then data rates and reliability are improved, but system complexity increases

Engineering Contradiction:

Improvedata rateVSAvoidsystem complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent divides the extended bandwidth into multiple component carriers (e.g., five 20 MHz carriers totaling 100 MHz), allowing the system to achieve higher data rates through parallel transmission while managing complexity by processing each carrier independently through standard MIMO techniques applied to each segment

Inventive Principle:

Principle #1Segmentation

2Productivity

If multiple component carriers are used for bandwidth extension, then transmission capacity increases, but control information management becomes more complex

Engineering Contradiction:

Improvetransmission capacityVSAvoidcontrol information management

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

Control information is segmented and distributed across multiple downlink control regions, with each region containing control information for a specific component carrier. This allows the system to manage control information for multiple carriers through standardized processing of each segment rather than handling a single complex control structure

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs universal control region structures that can serve multiple component carriers, where control information is formatted and processed using the same mechanisms across different carriers, reducing the need for carrier-specific control handling and simplifying overall management

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Productivity

If bandwidth extension is implemented, then peak data rates for IMT-A are achieved, but backward compatibility requirements are challenged

Engineering Contradiction:

Improvepeak data rateVSAvoidbackward compatibility

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent segments the extended bandwidth into multiple component carriers, allowing the system to maintain compatibility with devices designed for standard bandwidths by processing each carrier independently. Devices can operate on individual carriers while the system aggregates their throughput to achieve peak IMT-A data rates

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system implements bandwidth extension in a controlled manner by aggregating multiple component carriers, providing peak data rates for IMT-A when needed while maintaining the ability to operate at lower rates on individual carriers to ensure backward compatibility with existing devices

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS12574172B2Backward compatible bandwidth extension

Publication Date: 2026.03.10 TEXAS INSTRUMENTS INC

AI summary

A transmitter includes a bandwidth configuration unit configured to provide an increased system bandwidth corresponding to a bandwidth extension over multiple component carriers. Additionally, the transmitter also includes a transmit unit configured to employ the bandwidth extension.