NR Sidelink Resource Selection with Multiple Coordination Messages
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Solution Overview
Problem
In the Rel-16 NR SL system, half-duplex issues and hidden UE problems lead to resource collisions and interferences among UEs, which are not fully addressed by existing technologies, especially in diverse 5G V2X scenarios.
Innovation Solution
A resource selection method for multiple coordination messages is introduced, utilizing inter-UE coordination to establish associations between coordination message selection, resource selection, distance, and signal quality, ensuring that candidate resource sets are correctly identified within a target resource pool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If distributed resource selection is used in NR SL, then UE independence is improved, but resource collisions and interferences increase
Solution Approach 1:
The patent introduces coordination messages as intermediary information exchanged between UEs to mediate resource selection. These messages contain coordination information that helps UEs avoid resource collisions while maintaining distributed operation, resolving the contradiction between UE independence and resource collision avoidance
Solution Approach 2:
The patent implements feedback mechanisms where UEs send coordination messages containing resource selection information to other UEs. This feedback allows receiving UEs to adjust their resource selection to avoid collisions, maintaining independence while preventing harmful interference
2Reliability
If multiple coordination messages are received from different cooperative UEs, then coordination coverage is improved, but resource conflicts increase
Solution Approach 1:
The patent applies local quality by allowing different coordination messages to provide different coordination information tailored to local conditions of each cooperative UE. The receiving UE processes each message according to its specific situation, resolving conflicts through localized decision-making rather than uniform processing
Solution Approach 2:
The patent segments the coordination process by treating each coordination message as an independent information source. The receiving UE selectively processes and combines information from multiple messages, dividing the complex coordination task into manageable segments that can be handled individually
3Object-affected harmful factors
If inter-UE coordination is introduced, then resource collision avoidance is improved, but system complexity increases
Solution Approach 1:
The patent enables self-service by allowing UEs to autonomously generate and process coordination messages based on their own resource selection decisions. Each UE independently manages its coordination activities without requiring complex centralized control, reducing overall system complexity while maintaining collision avoidance capabilities
Data Source
AI summary
A node for wireless communications includes a transmitter for transmitting first signaling carrying a first source ID and a receiver for receiving a first signal on a target time-frequency resource block that is a time-frequency resource block in a target resource pool. The first source ID is used to identify another node, and the target resource pool includes a plurality of time-frequency resource blocks. In various embodiments, the first signaling indicates a first zone ID and/or a first candidate resource set that includes at least one time-frequency resource block. The first zone ID and/or a measurement corresponding to the first candidate resource set may be used to determine whether the first candidate resource set is within the target resource pool.