User Equipment Sidelink Resource Selection to Prevent Subframe Overlap

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Existing user equipment in LTE and NR sidelink communication systems face challenges in selecting resources for sidelink transmission, leading to potential interference and reduced transmission reliability due to overlapping resources on the same subframe or slot.

Innovation Solution

A method for user equipment to determine specific sets of subframes for transmission opportunities, ensuring that resources are not selected on the same subframe or slot, thereby maintaining single-carrier features and reducing interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If user equipment selects resources for sidelink transmission without restrictions, then transmission flexibility is improved, but resource overlap and interference occur reducing transmission reliability

Engineering Contradiction:
Improvetransmission flexibilityVSAvoidtransmission reliability
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The patent segments the time domain resources by excluding specific subframes (first and second sets of subframes) from the resource selection pool. This segmentation prevents resource overlap by dividing the available time resources into excluded portions and included portions, ensuring that selected resources do not overlap while maintaining flexibility in the included time periods.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent applies preliminary action by pre-defining the first and second sets of subframes to be excluded before the resource selection process. These excluded subframes are determined based on predetermined conditions (such as being within a certain duration of each other or meeting specific timing criteria), establishing constraints in advance to prevent resource overlap during subsequent transmission opportunities.

Inventive Principle:
Principle #10Preliminary action

2Productivity

If multiple transmission opportunities are scheduled on the same subframe, then transmission efficiency is improved, but single-carrier feature is violated causing increased interference

Engineering Contradiction:
Improvetransmission efficiencyVSAvoidinterference
Core Design Contradiction:
ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent segments the subframe structure by identifying and excluding specific subframe sets from resource selection. This ensures that multiple transmission opportunities are scheduled in different time periods rather than overlapping on the same subframe, maintaining single-carrier characteristics and preventing the harmful interference that would result from simultaneous transmissions.

Inventive Principle:
Principle #1Segmentation

3Quantity of substance

If resource selection allows overlapping subframes, then resource utilization is improved, but transmission reliability decreases due to interference

Engineering Contradiction:
Improveresource utilizationVSAvoidtransmission reliability
Core Design Contradiction:
Quantity of substanceVSReliability

Solution Approach 1:

The patent segments the available time resources by excluding specific subframe sets, creating distinct time periods for different transmission opportunities. This segmentation ensures that resources are allocated to non-overlapping time periods, maintaining high reliability while still achieving effective resource utilization through the included subframes.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent applies preliminary action by pre-identifying and excluding subframe sets that would cause overlap before the resource selection process begins. These excluded subframes are determined based on predetermined timing relationships, establishing safe resource allocation boundaries in advance to ensure reliability while maximizing usable resource capacity.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentEP4187999B1Method performed by user equipment, and user equipment
Publication Date: 2025.08.06 SHARP KK
  • EP4187999B1 patent drawingFigure 1~2
  • EP4187999B1 patent drawingFigure 3~4
  • EP4187999B1 patent drawingFigure 5

AI summary

Provided in the present invention are a method performed by user equipment and user equipment. The method includes: a MAC entity of user equipment receiving configuration information from upper layers, wherein the MAC entity is configured by the upper layers to perform sensing-based sidelink transmission; the user equipment selecting time domain and frequency domain resources for a first transmission opportunity; and the user equipment selecting time domain and frequency domain resources for a second transmission opportunity.