NR V2X Sidelink Resource Assignment With Availability Checking

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Solution Overview

Problem

The existing resource assignment methods for LTE-based Vehicle to Everything (V2X) systems are inadequate for the more complex service models in NR V2X systems, particularly due to non-periodic data transmission and the lack of mechanisms to determine resource availability before use, leading to potential resource collisions and reduced reliability.

Innovation Solution

An autonomous resource assignment method for NR V2X systems that includes determining a target resource set, selecting the earliest available resource, and using Resource Reservation Signaling (RRS) to indicate reserved resources, ensuring data transmission only occurs on available resources, thereby reducing collisions and improving transmission quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If autonomous resource selection method is used in NR V2X, then resource allocation flexibility is improved, but resource collision probability increases

Engineering Contradiction:

Improveresource allocation flexibilityVSAvoidresource collision probability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies preliminary action by having the UE perform LBT before transmitting data on the selected resource. The UE checks whether the resource is available by listening to the channel in a sensing window before actual transmission, thereby preventing collisions in advance while maintaining autonomous selection flexibility

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback mechanisms where the UE reports resource selection results and availability status to the network. The network provides feedback on resource availability and collision detection, enabling dynamic adjustment of resource allocation decisions to reduce collision probability while preserving flexibility

Inventive Principle:

Principle #23Feedback

2Reliability

If resource availability checking is performed before transmission, then transmission reliability is improved, but time delay increases

Engineering Contradiction:

Improvetransmission reliabilityVSAvoidtime delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies partial action by performing LBT and resource availability checking only for critical resources or when collision risk is detected, rather than continuously checking all resources. This selective approach maintains reliability for high-priority transmissions while minimizing unnecessary time delays for lower-priority communications

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS12615622B2Methods and devices of assigning resource for sidelink communication system

Publication Date: 2026.04.28 SAMSUNG ELECTRONICS CO LTD

AI summary

A resource assignment method performed by a user equipment (UE) is provided. The resource assignment method includes determining a target resource set for data transmission at a first time unit, selecting the earliest resource in time from the target resource set, wherein the selected resource is located at a second time unit, determining, at the second time unit and/or between the first time unit and the second time unit, whether the selected resource at the second time unit is available, and determining whether data is transmitted on the selected resource at the second time unit based on the result of the determination.