NR-V2X Terminal Conflict Indication for Overlapping Resource Reservations
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Solution Overview
Problem
In the context of NR-V2X communication, determining the target terminal for resource conflict indication is challenging when multiple terminals have overlapping resource reservations, particularly in scenarios involving hidden nodes, half-duplex issues, and excessive power consumption.
Innovation Solution
A terminal (UE-A) sends a reference resource set or conflict indication to another terminal (UE-B) to assist in resource selection, helping UE-B avoid conflicts and improve reliability by prioritizing resource reselection based on signal quality and priority.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a terminal sends resource conflict indication to multiple terminals, then resource conflict resolution coverage is improved, but signaling overhead and system complexity increase
Solution Approach 1:
The patent changes the parameter of target terminal selection from arbitrary or random selection to selection based on specific criteria including signal quality measurement and priority comparison. The terminal measures signal quality (e.g., RSRP) from candidate terminals and compares it with threshold values, and also compares priority levels of data to be transmitted, thereby determining the target terminal in a standardized manner that reduces complexity while improving resolution effectiveness.
Solution Approach 2:
The patent applies local quality by making the target terminal determination adaptive to local conditions. Different terminals are selected as targets based on their individual signal qualities and priority levels. The resource conflict indication is sent selectively to the most appropriate terminal(s) based on local measurements rather than uniformly to all candidates, optimizing the resolution process for each specific conflict scenario.
2Reliability
If resource conflict indication is sent to all candidate terminals, then conflict resolution completeness is improved, but power consumption and signaling overhead increase
Solution Approach 1:
The patent implements partial action by sending resource conflict indication only to necessary target terminals rather than to all candidate terminals. The selection of target terminals is based on signal quality thresholds and priority comparisons, ensuring that only terminals that truly need to resolve the conflict receive the indication. This reduces unnecessary signaling and power consumption while maintaining adequate conflict resolution coverage.
3Productivity
If resource selection is performed autonomously by terminals, then network control overhead is reduced, but resource allocation efficiency and conflict resolution capability deteriorate
Solution Approach 1:
The patent introduces feedback mechanisms where terminals measure signal qualities of received signals from other terminals and use this information to determine target terminals for resource conflict indication. The autonomous terminal performs sensing, measures RSRP values, compares them with thresholds, and adjusts its resource selection based on this feedback. This maintains autonomous operation while improving conflict detection and resolution through informed decision-making.
Data Source
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AI summary
A wireless communication method and a terminal device. The method comprises: a first terminal determining, according to target information and from a plurality of candidate terminals, a target reception terminal for first indication information, wherein the first indication information is used for indicating the occurrence of a resource conflict; the plurality of candidate terminals comprise a reference candidate terminal and a first candidate terminal group; a resource reserved for the reference candidate terminal is a target reception resource of the first terminal; the first candidate terminal group comprises at least one candidate terminal, and a resource reserved for the candidate terminal in the first candidate terminal group overlaps the resource reserved for the reference candidate terminal; and the target information comprises at least one of the following: the number of first-type candidate terminals in the first candidate terminal group, the first-type candidate terminal taking the first terminal as the target reception terminal; the states of the plurality of candidate terminals when receiving the first indication information; the signal qualities of the plurality of candidate terminals; and the priorities of data to be sent by the plurality of candidate terminals..