Sidelink Resource Selection Using UE IDs to Reduce NR V2X Collisions

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Solution Overview

Problem

In NR V2X sidelink communication mode 2, UEs autonomously selecting resources lead to increased resource collisions, excessive power consumption, and inefficient resource utilization due to continuous resource sensing and RSRP measurement.

Innovation Solution

A method for UEs to select sidelink resources based on a user identifier and the number of current UEs, dividing resource sets into units with sequential sequence numbers, ensuring all UEs in a cell use the same allocation granularity, and re-allocating IDs when necessary to minimize collisions and power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If UEs autonomously select sidelink transmission resources in mode 2, 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 network collects resource selection information from UEs and provides feedback by determining the number of current UEs performing sidelink transmission. This feedback enables the network to guide UE resource selection, reducing collisions while maintaining autonomous selection flexibility.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The invention changes the parameter of resource selection from completely autonomous UE decision-making to network-guided selection. The network uses the first user ID and number of current UEs as parameters to determine resource allocation, transforming the resource collision problem into a controlled parameter optimization problem.

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If UEs continuously perform resource sensing and RSRP measurement, then resource selection accuracy is improved, but power consumption increases

Engineering Contradiction:

Improveresource selection accuracyVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The network performs preliminary determination of the number of current UEs before UE resource selection. This preliminary action provides UEs with advance information about the transmission environment, eliminating the need for continuous sensing and measurement, thus reducing power consumption while maintaining selection accuracy.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The network serves itself by determining the number of current UEs and using this information to guide resource allocation. This self-service approach replaces the energy-intensive continuous sensing mechanism with a more efficient network-based determination method.

Inventive Principle:

Principle #25Self-service

3Reliability

If UEs perform continuous resource sensing and RSRP measurement, then resource selection reliability is improved, but processing resource occupation increases

Engineering Contradiction:

Improveresource selection reliabilityVSAvoidprocessing resource occupation

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention extracts the complex continuous sensing and measurement processes from UE operations and relocates the determination function to the network. The network determines the number of current UEs and provides this information to UEs, significantly reducing UE processing resource occupation while maintaining resource selection reliability.

Inventive Principle:

Principle #2Taking out (Extraction)

4Reliability

If the network allocates sidelink transmission resources, then resource collision probability is reduced, but resource allocation flexibility is decreased

Engineering Contradiction:

Improveresource collision probabilityVSAvoidresource allocation flexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The invention creates a dynamic resource allocation system where the network determines the number of current UEs and guides resource selection, but UEs retain autonomous selection capability. This dynamic approach adapts to changing network conditions while maintaining flexibility, resolving the contradiction between collision reduction and allocation flexibility.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12598034B2Methods, user equipment and non-transitory computer-readable media for autonomous resource selection

Publication Date: 2026.04.07 SAMSUNG ELECTRONICS CO LTD

AI summary

A method for autonomous resource selection by a user equipment (UE). The method includes obtaining a sidelink resource set, a number of current UEs and a first user identifier (ID) from a network, the number of current UEs corresponding to UEs currently participating in sidelink transmission in a serving cell, assigning a plurality of sequence numbers to a plurality of resource units among the sidelink resource set, selecting a subset of the plurality of resource units as sidelink resources of the UE based on the number of current UEs and the first user ID, the subset of the plurality of resource units having particular sequence numbers from among the plurality of sequence numbers, and transmitting a communication signal using the sidelink resources of the UE.