NR Sidelink Beam Alignment via Dynamic SL-BMRS Selection
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Solution Overview
Problem
Conventional beam management procedures for New Radio (NR) sidelink communication between user equipment (UEs) require the use of both wide and narrow beam groups for sidelink beam management reference signals (SL-BMRS), which can be inefficient and may result in no received beams in certain scenarios.
Innovation Solution
A method that allows the use of SL-BMRS beams from either a wide beam group, a narrow beam group, or both, or none, by receiving and determining the quality of these beams and establishing communication based on the received beam report information, enabling flexible beam alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If both wide beam group and narrow beam group SL-BMRS are used for beam alignment, then beam alignment accuracy is improved, but the number of required reference signals and overhead increases
Solution Approach 1:
The patent implements dynamic beam alignment by allowing UEs to flexibly select between wide beam group and narrow beam group SL-BMRS based on current channel conditions and requirements. The system transitions from a static requirement to use both beam groups to a dynamic selection mechanism, reducing overhead when full precision is not needed while maintaining accuracy when required.
Solution Approach 2:
The patent changes the parameter of beam group selection from a fixed configuration to a variable one, where the UE can choose to use wide beam group, narrow beam group, both, or neither based on quality information and channel conditions. This parameter change enables adaptive overhead reduction while preserving beam alignment accuracy when necessary.
2Measurement precision
If both wide beam group and narrow beam group SL-BMRS are used for beam alignment, then beam alignment precision is improved, but alignment time increases
Solution Approach 1:
The patent implements dynamic beam alignment by allowing UEs to flexibly select between wide beam group and narrow beam group SL-BMRS based on current channel conditions and requirements. The system transitions from a static requirement to use both beam groups to a dynamic selection mechanism, reducing overhead when full precision is not needed while maintaining accuracy when required.
Solution Approach 2:
The patent allows UEs to skip the narrow beam group SL-BMRS procedure when wide beam group provides sufficient quality information, rushing through the alignment process with reduced steps. This skipping mechanism reduces alignment time while maintaining sufficient precision for many scenarios.
3Reliability
If SL-BMRS beams from both wide and narrow beam groups are required, then system complexity increases, but beam alignment reliability improves
Solution Approach 1:
The patent implements dynamic beam alignment by allowing UEs to flexibly select between wide beam group and narrow beam group SL-BMRS based on current channel conditions and requirements. The system transitions from a static requirement to use both beam groups to a dynamic selection mechanism, reducing overhead when full precision is not needed while maintaining accuracy when required.
Solution Approach 2:
The patent changes the parameter of beam group selection from a fixed configuration to a variable one, where the UE can choose to use wide beam group, narrow beam group, both, or neither based on quality information and channel conditions. This parameter change enables adaptive overhead reduction while preserving beam alignment accuracy when necessary.
4Measurement precision
If additional beam sweeps are performed to identify narrow beams, then beam alignment accuracy is improved, but communication overhead increases
Solution Approach 1:
The patent implements dynamic beam alignment by allowing UEs to flexibly select between wide beam group and narrow beam group SL-BMRS based on current channel conditions and requirements. The system transitions from a static requirement to use both beam groups to a dynamic selection mechanism, reducing overhead when full precision is not needed while maintaining accuracy when required.
Solution Approach 2:
The patent performs preliminary assessment of wide beam group quality information before deciding whether to proceed with narrow beam group SL-BMRS. This preliminary action allows the system to avoid unnecessary narrow beam sweeps when wide beams provide sufficient quality, reducing communication overhead while maintaining accuracy when needed.
Data Source
AI summary
Inter-alia, a method is disclosed comprising: receiving a beam report information indicative of quality information about at least one of at least one beam of a first set of sidelink, SL beam management reference signals, -BMRS, or at least one beam of a second set of SL-BMRS; determining whether the beam report information is indicative of quality information of at least one beam of the first set of SL-BMRS or of at least one beam of the second set of SL-BMRS, or a combination of at least two beams of the first set of SL-BMRS and the second set of SL-BMRS; and attempting to establish or establishing communication based on the beam report information. It is further disclosed an according apparatus, computer program and system.