UE Beam Refinement in Multi-Cell 5G Scenarios
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently refining beams during communication, leading to delays and reduced throughput due to the need to measure multiple symbols of both serving and neighbor cells.
Innovation Solution
An enhanced beam refinement procedure is implemented, where the user equipment (UE) restricts measurements to the serving cell during the beam refinement process, allowing for a sweeping of multiple beams to identify a refined beam for improved communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE measures multiple symbols of both serving and neighbor cells during beam refinement, then the beam refinement accuracy is improved, but the time consumption and throughput are reduced
Solution Approach 1:
The patent extracts the beam refinement measurement process for neighbor cells and separates it from the serving cell measurements. By restricting serving cell beam refinement to only certain symbols (e.g., first and last symbols) while excluding middle symbols, the system reduces measurement time without significantly compromising beam refinement accuracy for the serving cell, thus resolving the contradiction between measurement precision and time consumption.
Solution Approach 2:
Instead of measuring all symbols for beam refinement, the patent applies partial action by selectively measuring only specific symbols (first and last symbols of the serving cell). This partial measurement approach maintains sufficient beam refinement accuracy while significantly reducing the time required, thereby resolving the contradiction between measurement precision and time consumption.
2Productivity
If the UE performs beam sweeping of multiple beams to identify refined beams, then the communication throughput is improved, but the complexity of the measurement process increases
Solution Approach 1:
The patent segments the beam refinement measurement process into distinct parts: serving cell beam refinement measurements on specific symbols, and neighbor cell measurements on other symbols. This segmentation allows the UE to perform multiple beam sweeps efficiently by organizing measurements in a structured manner, thereby improving throughput while managing complexity through systematic division of the measurement process.
Data Source
AI summary
Method and apparatus for an enhanced beam refinement procedure in a multi-cell scenario. The apparatus receives a beam refinement configuration indicating beam measurement is restricted to a serving cell and excluded for a neighbor cell. The apparatus measures an SSB of the serving cell by sweeping multiple beams restricted based on the beam refinement configuration. Measurement of a concurrent SSB of the neighbor cell is excluded in the sweeping of the multiple beams. The apparatus identifies a refined beam for the serving cell based on the sweeping of the multiple beams.