V2X Sidelink Resource Sharing Through Inter-UE Sensing Coordination
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Solution Overview
Problem
Existing vehicle-to-everything (V2X) communication systems face challenges in efficiently sharing wireless communication resources, leading to competition and inefficiencies among different UEs.
Innovation Solution
Implementing inter-UE coordination through sensing operations, where one UE shares sensing information with another UE to assist in resource selection, enhancing the reliability of sidelink transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If V2X communication systems autonomously select resources without inter-UE coordination, then device complexity is reduced, but resource sharing efficiency deteriorates and reliability decreases
Solution Approach 1:
The system performs sensing operations in advance to identify available resources before actual transmission. UEs collect sensing information about channel conditions, occupied resources, and interference levels during a sensing window, then use this pre-acquired information for resource selection. This preliminary action allows for more efficient resource sharing without requiring complex real-time coordination mechanisms.
Solution Approach 2:
The patent introduces sensing information as an intermediary that mediates resource allocation between UEs. Instead of direct complex coordination between all UE pairs, each UE independently processes sensing information (either self-collected or received from other UEs) to make resource selection decisions. This intermediary information structure simplifies the coordination mechanism while improving resource sharing efficiency.
2Reliability
If UEs perform comprehensive sensing operations to identify available resources, then resource allocation reliability is improved, but loss of time increases due to extended sensing windows
Solution Approach 1:
The system performs partial sensing by focusing on critical resource parameters rather than comprehensive analysis of all possible transmission parameters. UEs selectively sense and evaluate only the most relevant resources based on their transmission requirements, reducing the effective sensing time needed while maintaining sufficient reliability for safe resource selection.
Solution Approach 2:
The patent allows dynamic adjustment of sensing window duration and resource evaluation parameters based on traffic conditions, channel state, and urgency requirements. When low-latency communication is needed, the system reduces sensing window size and relies on previously collected sensing information. When high reliability is prioritized, the system can extend sensing duration. This parameter flexibility resolves the contradiction between reliability and time loss.
3Productivity
If UEs share sensing information with other UEs, then resource allocation efficiency is improved, but loss of information increases due to potential transmission errors
Solution Approach 1:
The system implements feedback mechanisms where UEs verify received sensing information against their own measurements and channel conditions. When discrepancies are detected, UEs can request retransmission or adjust their resource selection based on the confidence level of the information. This feedback loop maintains information accuracy while preserving the efficiency benefits of information sharing.
Solution Approach 2:
The patent incorporates redundancy and error protection measures in sensing information transmission. Sensing information is protected using error detection and correction codes, and critical information is transmitted with confirmation acknowledgments. This beforehand cushioning against potential transmission errors ensures that resource allocation efficiency is maintained without significant loss of information accuracy.
Data Source
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AI summary
A method of wireless communication performed by a sensing user equipment (UE) includes identifying available resources during a sensing window. The method also includes receiving a request to share the available resources with a transmitter UE. The method further includes determining the sensing UE satisfies a sharing condition. The method still further includes sharing the available resources with the transmitter UE based on satisfying the sharing condition.