FD Sidelink Beam Training via Candidate BPL Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems, particularly in 5G NR, face challenges in efficiently establishing full-duplex (FD) sidelink communication between user equipments (UEs) equipped with multiple transmission-reception points (TRPs) due to distance and line of sight (LOS) variations.
Innovation Solution
A method for determining candidate beam-pair links (BPLs) for both transmission and reception in FD sidelink communication, allowing for simultaneous transmission and reception using specific TRPs, and configuring FD beam training to select optimal BPLs for establishing reliable FD communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional beam training methods are used for FD sidelink communication, then beam pairing can be established, but the number of required reference signal measurements during beam sweeping becomes excessively large, reducing system efficiency
Solution Approach 1:
The patent segments the beam training process into two distinct phases: first determining candidate BPLs for transmission SL and reception SL separately, then performing FD beam training only on selected candidate pairs. This segmentation reduces the total number of RS measurements required while maintaining reliable beam pairing establishment.
Solution Approach 2:
The patent performs preliminary determination of candidate BPLs before the actual FD beam training process. By pre-identifying promising beam pairs based on individual SL measurements, the system prepares a reduced set of candidates that need detailed FD evaluation, thereby reducing overall measurement overhead.
2Reliability
If multiple TRPs are used for FD communication, then communication reliability improves through spatial diversity, but the complexity of determining appropriate beam pairs for simultaneous transmission and reception increases
Solution Approach 1:
The patent divides the complex multi-TRP beam pair determination into separate stages: first evaluating candidate BPLs for each SL independently, then filtering and selecting compatible pairs for FD operation. This segmented approach manages complexity by breaking down the multi-TRP coordination problem into manageable sub-problems.
Solution Approach 2:
The patent applies different evaluation criteria and measurement approaches for transmission SL versus reception SL when determining candidate BPLs. Each SL is optimized locally with appropriate beam selection criteria, then these local optimizations are combined to achieve global FD communication reliability across multiple TRPs.
Data Source
AI summary
The apparatus may be a first UE. The first UE may determine a first set of candidate BPLs associated with a first SL and a second set of candidate BPLs associated with a second SL. The first UE may further determine a configuration for FD beam training based on the determined first set of candidate BPLs and the determined second set of candidate BPLs, the FD beam training configuration may include multiple instances for which the first UE transmits and receives RS at a same time. The apparatus may also select, based on the determined FD beam training configuration, a first BPL in the first set of candidate BPLs for the first SL and a second BPL in the second set of candidate BPLs for the second SL. The first UE may establish FD communication with the second UE based on the selected first BPL and the selected second BPL.