Sidelink Coordination for V2X Resource Collision Avoidance
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Solution Overview
Problem
In next-generation radio access technology, there is a risk of radio resource collisions during sidelink communication, particularly in scenarios like platooning, where multiple user equipment (UEs) perform communication without explicit base station scheduling, leading to congestion and potential data transmission failures.
Innovation Solution
A method and device for controlling sidelink communication by receiving sidelink control information, determining the need to transmit coordination information, and transmitting collision indication, preferred resource, and non-preferred resource information to prevent resource collisions, allowing UEs to select or reselect resources dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If UEs perform sidelink communication without explicit base station scheduling, then communication autonomy and flexibility are improved, but radio resource collision risk increases
Solution Approach 1:
The patent applies preliminary action by having UEs perform sensing operations before resource selection to identify available resources and avoid collisions. The UE senses the sidelink channel to detect resources already reserved by other UEs, then selects resources based on this advance information, preventing collisions before they occur.
Solution Approach 2:
The patent implements feedback mechanisms where UEs transmit coordination information including collision indication information, preferred resource information, and non-preferred resource information to other UEs. This feedback loop allows UEs to adjust their resource selections based on real-time channel conditions and other UEs' transmissions, reducing collision risk while maintaining autonomy.
2Reliability
If coordination information is transmitted between UEs, then resource collision prevention is improved, but communication overhead increases
Solution Approach 1:
The patent applies local quality by making coordination information transmission selective rather than universal. UEs transmit coordination information only when necessary - specifically when collision risk is detected or when providing useful resource recommendations. This targeted approach maintains collision prevention effectiveness while minimizing unnecessary overhead.
Solution Approach 2:
The patent implements partial action by transmitting only the essential coordination information needed for collision avoidance rather than complete resource status information. The coordination information includes specifically collision indication information, preferred resource information, and non-preferred resource information - only the critical elements needed for effective collision prevention.
3Adaptability or versatility
If UEs dynamically select or reselect resources, then adaptability to channel conditions is improved, but resource selection complexity increases
Solution Approach 1:
The patent applies preliminary action by performing sensing operations before resource selection to gather channel condition information in advance. This preliminary sensing provides the UE with knowledge of available resources and other UEs' transmissions, simplifying the subsequent resource selection process while maintaining adaptability to current channel conditions.
Solution Approach 2:
The patent implements self-service by enabling UEs to autonomously perform sensing, resource selection, and coordination information transmission without base station intervention. The UE independently evaluates channel conditions, selects appropriate resources, and manages coordination with other UEs, reducing system complexity while maintaining adaptability.
Data Source
AI summary
The present disclosure relates to a method and a device for providing a V2X service in a next-generation radio access technology (New RAT) and provides a device and a method for controlling sidelink communication by a terminal, the method comprising the steps of: receiving sidelink control information including sidelink reservation resource information from a second terminal; determining whether to transmit coordination information; and when transmission with respect to the coordination information is determined, transmitting the coordination information including one of collision indication information, preference resource information, and non-preference resource information to the second terminal.