NR V2X BWP Configuration for Seamless Uu Sidelink Switching

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Solution Overview

Problem

In wireless communication systems, particularly in Next Generation Radio (NR) systems, the switching between Uu BWP and SL BWP for user equipment (UE) leads to delays and interruptions in communication due to the independent configuration of these bandwidth parts, which can impact both Uu and SL communication reliability and latency.

Innovation Solution

Configuring the Uu BWP and SL BWP to have the same numerology and center frequency, allowing for seamless switching without the need for BWP switching, thereby reducing the interruption duration and latency associated with BWP switching.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If Uu BWP and SL BWP are independently configured for a UE, then the UE can flexibly adapt to different communication requirements, but BWP switching delay and communication interruption occur

Engineering Contradiction:

ImproveBWP configuration flexibilityVSAvoidBWP switching delay

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent merges the configuration of Uu BWP and SL BWP by establishing a one-to-one correspondence between them, where they share the same numerology and frequency location. This combining approach eliminates the need for separate BWP switching operations, thereby resolving the contradiction between configuration flexibility and switching delay.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent makes the Uu BWP and SL BWP universally compatible by configuring them with identical numerology and frequency parameters. This multi-functionality allows the same BWP configuration to serve both Uu communication and SL communication purposes, eliminating switching requirements while maintaining adaptability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If BWP switching is performed between Uu BWP and SL BWP, then communication can be switched between different interfaces, but communication reliability and latency are degraded

Engineering Contradiction:

ImproveCommunication interface switching capabilityVSAvoidCommunication reliability and latency

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent performs preliminary configuration of Uu BWP and SL BWP with matching numerology and frequency parameters before communication occurs. This advance preparation ensures that when communication needs to switch between interfaces, no actual BWP switching is required, thereby maintaining communication reliability and latency performance.

Inventive Principle:

Principle #10Preliminary action

3Ease of manufacture

If Uu BWP and SL BWP are configured with different numerologies, then each can be optimized for its specific communication type, but switching between them requires delay

Engineering Contradiction:

ImproveCommunication optimizationVSAvoidSwitching delay

Core Design Contradiction:

Ease of manufactureVSLoss of time

Solution Approach 1:

The patent changes the numerology parameter configuration from being independent and potentially different for Uu BWP and SL BWP to being identical for both. This parameter alignment eliminates switching delays while still allowing each communication type to function effectively with the standardized numerology configuration.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11963137B2Method and apparatus for performing BWP-based communication in NR V2X

Publication Date: 2024.04.16 LG ELECTRONICS INC

AI summary

Provided are a method by which a first apparatus configures a bandwidth part (BWP) and an apparatus for supporting same. The method may comprise the steps of: configuring a first BWP related to communication between the first apparatus and a base station; and configuring a second BWP related to sidelink communication between the first apparatus and a second apparatus. Here, numerology of the first BWP and numerology of the second BWP may be the same.