Dynamic Guard Band Filter Control for Radio Communication

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

In radio communication systems employing OFDMA or SC-FDMA, the New Waveform technology aims to improve frequency use efficiency by reducing power leakage, but there is a need for a more adaptable filter application mode based on transmission/reception environments or use cases to optimize guard band usage.

Innovation Solution

An apparatus and method that control the application of filters to limit guard band widths in frequency bands, allowing for dynamic adjustment of filter application units and transmission of control information through radio communication to optimize frequency use efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If filters are applied to transmission signals to reduce power leakage in guard bands, then frequency use efficiency is improved, but device complexity increases due to the need for filter application control and processing

Engineering Contradiction:

Improvefrequency use efficiencyVSAvoiddevice complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent implements dynamic filter application where the filter processing is selectively applied based on transmission conditions, resource types, and environmental factors. The control unit dynamically determines whether to apply filters to specific transmission signals, allowing the system to adapt between filtered and unfiltered modes rather than using a fixed filter configuration for all transmissions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of filter application from a static binary state (applied/not applied) to a dynamic controllable parameter. By introducing control information that specifies filter application conditions, resource types, and transmission environments, the system can adjust the filtering parameter based on actual needs, optimizing the balance between frequency efficiency and device complexity.

Inventive Principle:

Principle #35Parameter changes

2Object-generated harmful factors

If filters are applied to all transmission signals, then power leakage is reduced, but loss of time increases due to additional processing for every signal

Engineering Contradiction:

Improvepower leakageVSAvoidprocessing time

Core Design Contradiction:

Object-generated harmful factorsVSLoss of time

Solution Approach 1:

The patent applies filters selectively to only those transmission signals that require power leakage reduction, rather than applying filters to all signals universally. The control unit determines which specific transmission signals need filtering based on factors such as resource type, transmission environment, and power leakage risk, applying the filter only when necessary to avoid unnecessary processing time.

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The patent implements local filter application where different transmission signals receive different filter treatments based on their specific characteristics and transmission conditions. Instead of uniform filter application across all signals, the system applies filtering locally to specific resource blocks, subcarriers, or transmission periods where power leakage is a concern, while leaving other signals unfiltered to minimize processing overhead.

Inventive Principle:

Principle #3Local quality

3Object-affected harmful factors

If guard band width is increased to reduce power leakage, then interference to adjacent systems is reduced, but frequency use efficiency deteriorates due to more frequency bands being used as guard bands

Engineering Contradiction:

Improveinterference to adjacent systemsVSAvoidfrequency use efficiency

Core Design Contradiction:

Object-affected harmful factorsVSProductivity

Solution Approach 1:

The patent replaces the mechanical approach of increasing guard band width (physical frequency allocation) with a signal processing approach using filters. Instead of allocating more frequency bands as guard bands to reduce power leakage, the system applies digital or analog filters to transmission signals to suppress power leakage within the existing guard band structure, thereby maintaining frequency use efficiency while achieving interference reduction.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS11706072B2Apparatus and method for filtering a bit stream and providing guard bands

Publication Date: 2023.07.18 SONY GROUP CORP

AI summary

An apparatus including: a communication unit configured to perform radio communication; and a control unit configured to perform control such that control information regarding a resource to which a filter for limiting a width of a guard band in a frequency band to be used in the radio communication is applied is transmitted to an external apparatus through the radio communication. The filter improves frequency use efficiency.