Sidelink PSFCH Transmission Decision Using Zone Sizes
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Solution Overview
Problem
Current 5G V2X systems face inefficiencies in sidelink HARQ-ACK transmission due to unoptimized use of radio resources, particularly in multi-TRP scenarios where different beam coverage scenarios require adaptive transmission strategies based on positional information.
Innovation Solution
A method where nodes determine whether to transmit sidelink signals based on current location, using zone sizes and radio resource pools associated with specific Transmit-Receive Points (TRPs), allowing for flexible decision-making on PSFCH transmission to optimize resource usage and adapt to varied scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single zone size is used for all TRPs, then the system is simple to configure, but it cannot adapt to different beam coverage scenarios and leads to inefficient resource usage
Solution Approach 1:
The patent applies local quality by configuring different zone sizes for different TRPs based on their specific beam coverage characteristics. Each TRP receives a customized zone size configuration that matches its coverage area, allowing the system to adapt to local conditions rather than applying a uniform configuration across all TRPs.
Solution Approach 2:
The patent segments the zone size configuration by TRP, where each TRP is independently configured with its own zone size parameter. This segmentation allows the system to manage complexity by breaking down the overall configuration into smaller, TRP-specific units that can be independently optimized.
2Reliability
If PSFCH is transmitted for all sidelink communications regardless of distance, then feedback reliability is maintained, but unnecessary overhead and resource waste occur
Solution Approach 1:
The patent implements dynamic PSFCH transmission by allowing UEs to adaptively determine whether to transmit feedback based on their relative distance. The zone size configuration defines dynamic thresholds that automatically adjust feedback transmission behavior according to the communication scenario, balancing reliability requirements with resource efficiency.
Solution Approach 2:
The patent changes the transmission parameter (PSFCH transmission decision) based on the distance parameter. By comparing the measured distance against the configured zone size threshold, the system dynamically adjusts whether to transmit feedback, thereby optimizing the balance between reliability and resource consumption.
3Loss of energy
If PSFCH transmission is restricted only when UEs are very close, then resource overhead is reduced, but feedback reliability deteriorates for wider coverage scenarios
Solution Approach 1:
The patent applies local quality by customizing the zone size for each TRP according to its beam coverage characteristics. TRPs with wider coverage areas are configured with larger zone sizes, allowing PSFCH transmission to be restricted at greater distances, while TRPs with narrower coverage use smaller zone sizes to maintain feedback transmission over shorter ranges, ensuring reliability is maintained locally for each TRP's specific scenario.
4Productivity
If multiple zone sizes are configured for different TRPs, then resource usage is optimized for each TRP's coverage area, but the system complexity increases
Solution Approach 1:
The patent segments the zone size configuration into TRP-specific parameters, allowing each TRP to have its own optimized zone size. This segmentation enables independent optimization of resource usage for each TRP based on its coverage characteristics, while the modular structure keeps the complexity manageable by treating each TRP configuration as an independent unit.
Solution Approach 2:
The patent changes the zone size parameter for each TRP according to its beam coverage area. By configuring larger zone sizes for wide-coverage TRPs and smaller zone sizes for narrow-coverage TRPs, the system optimizes resource usage efficiency for each TRP's specific operational characteristics.
Data Source
AI summary
The present disclosure provides a method and a device in a node used for wireless communications. A first node firstly receives a first signaling and a second signaling, the first signaling indicating a first zone size and a second zone size, while the second signaling indicating a first radio resource pool and a second radio resource pool; and then determines according to the current position whether to transmit a first signal in a first radio resource set; when the first radio resource set is associated with the first radio resource pool, the first zone size is used to determine the current position. By respectively associating the first zone size and the second zone size with the first radio resource pool and the second radio resource pool, the present disclosure manages to optimize the determination of feedback transmission in sidelink, which in turn improves the spectrum efficiency of sidelink transmission.