NR Sidelink BWP Configuration Without Dynamic Switching

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Solution Overview

Problem

The configuration of resources for sidelink communication in NR is unclear, leading to complexity in receiver design and potential interference issues due to dynamic BWP switching, which complicates sidelink and Uu communication coexistence.

Innovation Solution

Implementing a static BWP configuration for sidelink transmission and reception, with separate BWPs for sidelink and Uu operations, and using bitmap signaling for time domain resource allocation to simplify the receiver design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If dynamic BWP switching is supported for sidelink transmission and reception, then adaptability of resource configuration is improved, but receiver complexity increases and interference issues occur

Engineering Contradiction:

Improveresource configuration adaptabilityVSAvoidreceiver complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the carrier into separate BWPs for sidelink and Uu operations. This segmentation allows independent configuration and management of resources for different communication types, avoiding the complexity of dynamic switching while maintaining adaptability through dedicated resource pools.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of supporting dynamic BWP switching for sidelink (which would increase complexity), the patent inverts the approach by explicitly prohibiting dynamic switching and using static BWP assignment with bitmap-based time domain resource indication. This inversion simplifies receiver design while still providing flexible resource allocation.

Inventive Principle:

Principle #13The other way round (Inversion)

2Adaptability or versatility

If dynamic BWP switching is used for sidelink communication, then resource flexibility is improved, but interference with Uu communication occurs

Engineering Contradiction:

Improveresource flexibilityVSAvoidinterference

Core Design Contradiction:

Adaptability or versatilityVSObject-generated harmful factors

Solution Approach 1:

The patent segments the frequency spectrum into separate BWPs for sidelink and Uu communications. This frequency domain segmentation prevents interference by ensuring that sidelink and Uu operations occupy different frequency resources, while still allowing flexible resource allocation within each segmented BWP.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces separate BWP configurations as intermediaries between the carrier and the actual communication signals. These intermediate BWP structures act as resource isolation layers that prevent direct interference between sidelink and Uu communications while maintaining individual resource flexibility.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Device complexity

If a single BWP is used for both sidelink and Uu operations, then device complexity is reduced, but interference and resource conflict occur

Engineering Contradiction:

Improvedevice complexityVSAvoidresource conflict

Core Design Contradiction:

Device complexityVSObject-generated harmful factors

Solution Approach 1:

The patent segments the carrier into multiple dedicated BWPs - one for sidelink operations and another for Uu operations. This segmentation eliminates resource conflicts by providing dedicated frequency resources for each communication type, while the overall device architecture remains relatively simple through standardized BWP management procedures.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12477520B2User equipment, base station and wireless communication method

Publication Date: 2025.11.18 PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA

AI summary

Provided are a user equipment, base station and wireless communication methods related to resource configuration for sidelink communication, sidelink discovery or any other sidelink operation in NR. A user equipment comprises: circuitry operative to determine a Bandwidth Part (BWP) assigned for sidelink transmission and reception in a carrier; and a transceiver operative to perform the sidelink transmission and reception on the determined BWP in the carrier, wherein dynamic BWP switching is not supported for the sidelink transmission and reception in the carrier.