Sidelink Beam Training Resource Conflict Resolution
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Solution Overview
Problem
In sidelink scenarios of the NR system, the reliability and effectiveness of beam training are reduced due to the transmit and receive ends being terminal devices, which complicates the beam management process and increases the likelihood of resource conflicts.
Innovation Solution
A method for sidelink beam training that involves determining K first occasions with P time units, sending N first beams in N sending time units, and selecting unoccupied or low-conflict time units for beam training, ensuring consistent understanding between the transmit and receive ends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam training is performed in sidelink scenarios using terminal devices as both transmit and receive ends, then beamforming capability is enabled, but resource conflicts increase and reliability decreases
Solution Approach 1:
The patent applies preliminary action by determining multiple candidate first occasions (K > 1) before performing beam training. The terminal device pre-identifies several potential time domain resources that could be used for beam training, ensuring that there are alternative resources available if conflicts occur. This advance preparation reduces the likelihood of resource conflicts during actual beam training operations.
Solution Approach 2:
The patent implements dynamics by allowing the selection of the first target occasion from multiple candidate occasions based on real-time conditions. The system dynamically selects which candidate occasion to use for beam training, adapting to changing resource availability and conflict conditions. This dynamic selection process enhances reliability by flexibly avoiding occupied resources.
2Reliability
If multiple candidate time units are used for beam training, then the probability of resource conflicts is reduced, but the complexity of resource selection increases
Solution Approach 1:
The patent applies segmentation by dividing the time domain resources into distinct first occasions, where each occasion contains multiple time units. This segmentation organizes the complex resource space into manageable segments (K first occasions with P time units each), making it easier to identify and select appropriate resources while reducing the overall complexity of beam management.
3Reliability
If the transmit end sends beams in multiple time units, then beam training coverage is improved, but the time required for beam training increases
Solution Approach 1:
The patent applies partial action by sending N first beams (where N ≤ P) in the selected first target occasion, rather than using all available time units. This partial utilization of time units within each occasion allows the system to achieve sufficient beam training coverage without unnecessarily extending the training duration, thus balancing coverage improvement with latency reduction.
Data Source
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AI summary
Embodiments of this application provide a sidelink beam training method and apparatus. The method includes: determining K first occasions, where each of the K first occasions includes P time units, the P time units include N sending time units, K, P, and N are all positive integers greater than 1, and N is less than or equal to P; determining a first target occasion from the K first occasions; and sending N first beams in the N sending time units of the first target occasion, where the N first beams carry a first sidelink signal, and the first sidelink signal is used for beam training. According to the foregoing method, reliability and effectiveness of sidelink beam training can be improved.