Sidelink Resource Reselection Using Inter-UE Conflict Feedback
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Solution Overview
Problem
Existing 5G and beyond wireless communication systems face challenges in efficiently managing resource conflicts between user equipment (UEs) for sidelink communication, leading to interference issues in resource allocation mode 2, which affects the performance of services like V2X and NR sidelink communication.
Innovation Solution
A method and apparatus for managing inter-UE coordination by storing and using resource conflict information to support resource selection and reselection in sidelink communication, allowing UEs to transmit and receive conflict information through a physical sidelink feedback channel (PSFCH) and adjust resource allocation based on previous conflict information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If resource allocation mode 2 is used for sidelink communication, then UE autonomy in resource selection is improved, but resource conflicts and interference between UEs increase
Solution Approach 1:
The patent implements a feedback mechanism where UEs transmit conflict information received from other UEs back to the network side. This feedback loop enables the network to be informed of resource conflicts and adjust allocations accordingly, reducing interference while maintaining UE autonomy in resource selection.
Solution Approach 2:
The patent stores conflict information received from UEs in advance, enabling the network to perform preliminary analysis and adjustment of resource allocations before actual conflicts occur. This preliminary action allows the network to proactively resolve potential interference issues.
2Reliability
If conflict information is stored and used for resource reselection, then interference avoidance is improved, but device complexity increases
Solution Approach 1:
The patent extracts and stores only the essential conflict information from the complex interactions between UEs, rather than managing all communication details. This extraction approach simplifies the information management burden while maintaining the ability to effectively avoid interference through resource reselection.
3Productivity
If resource selection is based on stored conflict information, then resource utilization efficiency is improved, but processing time increases
Solution Approach 1:
The patent performs preliminary storage and organization of conflict information, enabling faster resource selection decisions in the future. By preparing conflict data in advance, the network can quickly reference stored information during resource allocation without performing complex real-time analysis, thus reducing processing time while maintaining high resource utilization efficiency.
Data Source
AI summary
The present disclosure relates to a 5G or 6G communication system for supporting higher data transmission rates. A method for a first terminal for sidelink communication according to an embodiment of the present disclosure may comprise the steps of: transmitting, to a second terminal, sidelink control information (SCI) comprising resource reservation information for resources for sidelink transmission; receiving, from the second terminal, conflict information for a resource indicated by the resource reservation information; and on the basis of at least one piece of previously received conflict information, reselecting a resource for a subsequent sidelink transmission.