NR V2X Resource Allocation With Receiver Conflict Feedback

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Solution Overview

Problem

In V2X communication, receiver UEs face issues with unsuccessful reception due to In-Band-Emission (IBE) and hidden node problems, leading to low accuracy in information sending and receiving, particularly in NR V2X mode2 where unicast and multicast communications with varying emission powers are supported, and conventional resource pool division methods like Zone ID are ineffective.

Innovation Solution

A method and system for processing resource allocation in V2X communication that involves determining conflicts between reserved resources of interferer and sender UEs, generating auxiliary information to represent these conflicts, and adjusting resources based on this information to resolve IBE and hidden node issues, including steps like determining adjacency, RSRP thresholds, and adjusting emission powers or resource selection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If resource pool is divided by Zone ID method, then resource allocation is simplified, but it is ineffective for NR V2X mode2 with varying emission powers

Engineering Contradiction:

Improveresource allocation simplicityVSAvoidadaptability to varying emission powers

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent changes the parameters used for resource pool division from static Zone ID to dynamic parameters including emission power levels, UE coordinates, and path loss characteristics. This allows the resource allocation to adapt to varying emission powers in NR V2X mode2 while maintaining structured organization through parameter-based segmentation.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces dynamic resource pool configuration where the resource pool assignment changes based on real-time parameters such as emission power variations and channel conditions. This dynamic approach replaces the static Zone ID method, enabling the system to adapt to changing transmission conditions in unicast and multicast communications.

Inventive Principle:

Principle #15Dynamics

2Loss of energy

If receiver UE autonomously selects resources without feedback, then communication overhead is reduced, but IBE and hidden node problems cause reception failures

Engineering Contradiction:

Improvecommunication overheadVSAvoidreception success rate

Core Design Contradiction:

Loss of energyVSReliability

Solution Approach 1:

The patent introduces a feedback mechanism where receiver UEs send feedback information to sender UEs about the reception status and detected interference conditions. This feedback loop enables sender UEs to adjust their resource selection and transmission parameters to avoid IBE and hidden node problems, significantly improving reception success rates while maintaining reasonable overhead through selective feedback transmission.

Inventive Principle:

Principle #23Feedback

3Reliability

If sender UE increases emission power to overcome interference, then signal reception is improved, but interference to other UEs increases

Engineering Contradiction:

Improvesignal reception qualityVSAvoidinterference to other UEs

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent applies local quality by assigning different resource pools to different geographic locations and emission power levels. Instead of uniformly increasing emission power, the system provides targeted signal enhancement in specific local areas where interference occurs, using location-aware resource allocation to improve reception quality without causing widespread interference to other UEs.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent segments the resource pool into multiple sub-pools based on emission power levels and geographic zones. This segmentation allows the system to allocate appropriate resources to different UEs based on their specific interference conditions, enabling selective power adjustment for individual UEs rather than blanket power increases that would cause widespread interference.

Inventive Principle:

Principle #1Segmentation

4Adaptability or versatility

If resource selection window is enlarged to provide more options, then resource selection flexibility is improved, but probability of selecting conflicting resources increases

Engineering Contradiction:

Improveresource selection flexibilityVSAvoidresource conflict probability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies preliminary action by having receiver UEs perform advance sensing and reporting of resource availability in the resource selection window. Before the sender UE makes its final resource selection, the system pre-identifies and marks resources that are likely to cause conflicts based on prior observations and interference patterns, enabling the sender to avoid these pre-identified conflicting resources while still maintaining flexibility in the enlarged selection window.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12513726B2Method, system, and device for processing resource allocation in V2X communication, and medium

Publication Date: 2025.12.30 SPREADTRUM COMMUNICATION (SHANGHAI) CO LTD

AI summary

Disclosed are a method and system for processing resource allocation in V2X communication, and a storage medium. The method is applied to a receiver UE and includes: determining whether there is a conflict between a reserved resource of an interferer UE and a reserved resource of a sender UE; and generating auxiliary information and sending the auxiliary information to the sender UE, in response to determining that there is the conflict. The auxiliary information is used for representing the conflict.