NR V2X Sidelink Resource Coordination for Collision-Aware Allocation

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Solution Overview

Problem

Existing Mode 2 resource allocation schemes in NR V2X lack coordination between UEs, leading to resource collisions and inefficiencies in sidelink communication, which affect reliability and resource utilization.

Innovation Solution

Implement a mechanism for UE coordination through a receiving UE transmitting a coordination message indicating resource collisions to a transmitting UE, allowing for resource re-selection and reducing feedback channel payload.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If autonomous resource selection based on channel sensing is used, 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 implements a feedback mechanism where receiving UEs send coordination messages to transmitting UEs regarding resource collision detections. The transmitting UE uses this feedback information to adjust its resource selection, thereby reducing collisions while maintaining autonomous allocation flexibility. This resolves the contradiction by introducing inter-UE coordination feedback without requiring network control.

Inventive Principle:

Principle #23Feedback

2Reliability

If coordination messages are transmitted to indicate resource collisions, then resource selection reliability is improved, but feedback channel payload size increases

Engineering Contradiction:

Improveresource selection reliabilityVSAvoidfeedback channel payload size

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent extracts only the essential collision indication information from the coordination message, sending minimal payload that specifically indicates resource collision status rather than transmitting complete resource allocation details. This reduces feedback channel overhead while maintaining the reliability benefit of coordination.

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If resource re-selection is performed based on coordination messages, then collision probability is reduced, but transmission latency increases

Engineering Contradiction:

Improvecollision probabilityVSAvoidtransmission latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent performs resource re-selection proactively upon receiving coordination messages indicating potential collisions, rather than waiting for actual collision occurrence. This preliminary action prevents collisions before they happen, reducing retransmission delays and overall transmission latency while maintaining high reliability.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP4201098B1Apparatus for inter-UE coordinated resource allocation in wireless communication

Publication Date: 2026.04.15 APPLE INC

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AI summary

A user equipment (UE) device comprising a processor configured to perform operations is described. In an exemplary embodiment, the operations include comprising establishing a sidelink session with a transmitting UE; configuring the sidelink session to support coordinated resource selection prior to performing the local sensing; performing a local sensing; receiving a PSCCH and a PSSCH from the transmitting UE. The transmitting UE reserves multiple resources. The processor is further configured to perform operations including determining whether a collision happens among the multiple reserved resources; and transmitting the coordination message to the transmitting UE.