Inter-UE Coordination for Sidelink Resource Collision Avoidance
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Solution Overview
Problem
Current mobile communication systems face challenges in coordinating sidelink transmissions between user equipment (UEs) to avoid collisions and half-duplex conflicts, particularly in scenarios where UEs are outside each other's transmission range or operate in half-duplex mode, leading to resource collisions and incomplete sensing results.
Innovation Solution
A method where a coordinating UE receives indications and groupcast transmission parameters from a base station to determine and transmit sidelink transmission parameters to other UEs, ensuring resource selection that avoids collisions and half-duplex conflicts by exchanging assistance information and coordinating resource usage among UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UEs perform autonomous resource selection for sidelink transmissions, then device autonomy and operational flexibility are improved, but resource collisions and half-duplex conflicts occur leading to reduced transmission reliability
Solution Approach 1:
A coordinating UE is introduced as an intermediary between multiple transmitting UEs to manage resource allocation. The coordinating UE receives transmission parameters from UEs, determines collision-free resources, and provides coordinated resource allocation information back to the UEs, thereby maintaining device autonomy while preventing resource collisions and half-duplex conflicts
Solution Approach 2:
The system implements feedback mechanisms where transmitting UEs send their intended transmission parameters to the coordinating UE, which then provides feedback regarding resource collisions and recommended alternative resources. This feedback loop enables UEs to adjust their resource selection dynamically to avoid conflicts while maintaining operational flexibility
2Area of stationary object
If UEs outside each other's transmission range select resources autonomously, then coverage area is improved, but incomplete sensing results lead to increased resource collisions
Solution Approach 1:
The coordinating UE merges and consolidates transmission parameter information from multiple UEs that are outside each other's transmission range. By combining sensing results and transmission intentions from multiple sources, the coordinating UE can make informed resource allocation decisions that account for the extended coverage area while compensating for incomplete individual sensing results
Solution Approach 2:
The coordinating UE performs preliminary resource determination and coordination before actual sidelink transmissions occur. By pre-analyzing transmission parameters and sensing results from multiple UEs and providing coordinated resource allocation information in advance, the system enables UEs outside transmission range to select resources with reduced collision risk despite limited individual sensing capability
3Productivity
If multiple UEs transmit simultaneously in half-duplex mode, then communication efficiency is improved, but half-duplex conflicts and resource collisions occur reducing system performance
Solution Approach 1:
The coordinating UE acts as a mediator that receives transmission parameters from multiple half-duplex UEs, analyzes potential conflicts, and provides coordinated resource allocation information that enables simultaneous transmissions without conflicts. This intermediary function maintains high communication efficiency while preventing half-duplex conflicts that would otherwise degrade system performance
Data Source
AI summary
An apparatus for utilization in wireless communications comprises an antenna for use in transmission of electromagnetic signals, a memory for maintaining computer-readable code, and a processor for executing the computer-readable code. The processor causes the apparatus to transmit an indication including at least one of information that the first UE has been assigned a coordinating UE for coordination of sidelink transmissions of a plurality of additional UEs or information identifying an assigned coordinating UE, and transmit one or more groupcast transmission parameters for transmitting sidelink transmission parameters to the plurality of additional UEs.