BWP Switching Timing Control for Sidelink Communication

Solution Overview

Problem

In 5G NR, the time delay caused by switching between different bandwidth parts (BWP) for sidelink communication in V2X devices is a significant issue, as it disrupts continuous communication.

Innovation Solution

The proposed method involves receiving timing information for BWP switching from the base station and performing the switching based on this information, which includes specific times for starting the switching process, thereby minimizing delays.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the UE switches from the first BWP for uplink to the second BWP for sidelink, then the sidelink communication can be established, but time delay occurs

Engineering Contradiction:

Improvesidelink communication capabilityVSAvoidBWP switching time delay

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The base station provides advance notification of the BWP switching timing to the UE before the actual switching occurs. This allows the UE to prepare for the switch in advance, reducing the overall time delay. The UE receives information about when the switching should start (after receiving the timing information) and can accordingly prepare the necessary resources and configurations before the actual switch.

Inventive Principle:

Principle #10Preliminary action

2Adaptability or versatility

If BWP switching is performed for sidelink communication, then communication flexibility is improved, but transmission interruption occurs

Engineering Contradiction:

ImproveBWP switching flexibilityVSAvoidcommunication continuity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The base station provides feedback information to the UE about the exact timing when BWP switching should occur. This feedback mechanism allows the UE to synchronize the switching operation with the network's expectations, ensuring that the switch happens at the optimal moment to minimize transmission interruption and maintain communication reliability.

Inventive Principle:

Principle #23Feedback

3Manufacturing precision

If the UE waits for base station instruction before switching BWP, then switching accuracy is improved, but time delay increases

Engineering Contradiction:

ImproveBWP switching accuracyVSAvoidswitching response time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The base station provides advance notification of the BWP switching timing to the UE before the actual switching occurs. This allows the UE to prepare for the switch in advance, reducing the overall time delay. The UE receives information about when the switching should start (after receiving the timing information) and can accordingly prepare the necessary resources and configurations before the actual switch.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12225540B2Method for switching BWP for sidelink communication, and communication device

Publication Date: 2025.02.11 LG ELECTRONICS INC

AI summary

Provided in one embodiment of the present specification is a method for switching a bandwidth part (BWP) for sidelink communication. The method can comprise the steps of: receiving information about a bandwidth part (BWP) switching timing from a base station; and switching a BWP on the basis of the information about the BWP switching timing. The information about the BWP switching timing can include information about the point of time at which the BWP switching should be started after the information has been received. The information about the BWP switching timing can be received through downlink control information (DCI) or a radio resource control (RRC) signal.