Radio Communication Apparatus Bandwidth Part Allocation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The coexistence of OFDM and DFT-S-OFDM radio transmission schemes within the same transmission time interval poses challenges in radio communication control, leading to inefficient resource allocation and interference control, particularly in New Radio (NR) systems, where DFT-S-OFDM transmission is limited by the allocation of contiguous radio resources.

Innovation Solution

A radio communication apparatus and method that allow communication using a first radio transmission scheme (e.g., OFDM) within a frequency band and a second radio transmission scheme (e.g., DFT-S-OFDM) within a bandwidth part of the frequency band, where radio resources within the bandwidth part are allocable for communication using the second scheme, enabling more flexible and efficient resource allocation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If OFDM is adopted as a radio transmission scheme to enable flexible radio resource allocation, then adaptability is improved, but peak power increases resulting in reduced coverage

Engineering Contradiction:

Improveradio resource allocation flexibilityVSAvoidpeak power

Core Design Contradiction:

Adaptability or versatilityVSPower

Solution Approach 1:

The frequency band is divided into multiple bandwidth parts, with each bandwidth part supporting a specific radio transmission scheme. This segmentation allows OFDM and DFT-S-OFDM to coexist in different frequency regions, enabling flexible resource allocation while maintaining low peak power characteristics in specific segments where DFT-S-OFDM is used.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different radio transmission schemes are applied to different bandwidth parts based on local requirements. DFT-S-OFDM is used in bandwidth parts where low peak power and wide coverage are prioritized, while OFDM is used in bandwidth parts where flexible resource allocation is more important. This local differentiation resolves the contradiction by allowing each scheme to operate in its optimal environment.

Inventive Principle:

Principle #3Local quality

2Area of stationary object

If both OFDM and DFT-S-OFDM are adopted as radio transmission schemes to enable coverage enlargement, then coverage is improved, but control complexity increases when the schemes coexist

Engineering Contradiction:

Improvecoverage areaVSAvoidcontrol complexity

Core Design Contradiction:

Area of stationary objectVSDevice complexity

Solution Approach 1:

The frequency band is segmented into multiple bandwidth parts, with each bandwidth part configured for a specific radio transmission scheme. This segmentation simplifies control by allowing independent configuration and management of each bandwidth part, reducing the overall control complexity despite supporting multiple transmission schemes simultaneously.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically selects which radio transmission scheme to use in each bandwidth part based on channel conditions, coverage requirements, and traffic patterns. This dynamic adaptation allows the system to optimize performance while maintaining manageable control complexity through standardized selection criteria.

Inventive Principle:

Principle #15Dynamics

3Power

If DFT-S-OFDM is used for uplink data transmission to achieve low peak power, then power efficiency is improved, but radio resource allocation flexibility is reduced due to contiguous subcarrier requirement

Engineering Contradiction:

Improvepeak powerVSAvoidradio resource allocation flexibility

Core Design Contradiction:

PowerVSAdaptability or versatility

Solution Approach 1:

By dividing the frequency band into multiple bandwidth parts and configuring DFT-S-OFDM in specific bandwidth parts, the system maintains the contiguous subcarrier requirement within each bandwidth part while providing overall flexibility through the ability to allocate different bandwidth parts to different users and services.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The bandwidth part concept serves multiple functions: it enables DFT-S-OFDM to operate with contiguous subcarriers for low peak power, while simultaneously allowing OFDM to operate in other bandwidth parts for flexible resource allocation. This multi-functionality resolves the contradiction by making the system adaptable to different requirements through a unified framework.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11962521B2Radio communication apparatus, method, program, non-transitory computer readable recording medium, and system

Publication Date: 2024.04.16 NEC CORP

AI summary

In order to enable control related to radio communication to be performed more appropriately when radio transmission schemes coexist, a radio communication apparatus according to an example aspect of the present invention includes a radio communication processing unit configured to perform communication using a first radio transmission scheme within a frequency band, wherein the radio communication processing unit is configured to perform communication using a second radio transmission scheme within a bandwidth part of the frequency band, radio resources within the bandwidth part being allocable for communication using the second radio transmission scheme.