Per-SSB Beam Switching for Neighbor Cell Measurement
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently switching beams for measurement opportunities, leading to delayed mobility and suboptimal measurement of serving and neighbor cells.
Innovation Solution
Implementing per-SSB (synchronization signal block) beam switching in user equipment (UE) to determine and switch between different receive beams during each SSB duration within a SSBS duration, allowing for parallel measurement of serving and neighbor cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional beam switching methods are used for neighbor cell measurement, then the measurement process can be completed, but measurement delay increases and mobility performance deteriorates
Solution Approach 1:
The patent segments the beam switching process by determining a first receive beam for a first SSB duration and a second receive beam for a second SSB duration within an SSBS duration. This segmentation allows parallel measurement of serving and neighbor cells using different beams, thereby reducing measurement delay while improving mobility performance through simultaneous multi-cell assessment.
Solution Approach 2:
The patent applies preliminary action by determining receive beams in advance for specific SSB durations before actual neighbor cell measurement begins. The UE pre-configures the first receive beam for the first SSB duration and the second receive beam for the second SSB duration, enabling immediate parallel measurement when SSB transmissions occur, thus reducing overall measurement delay.
2Measurement precision
If single receive beam is used for SSB reception, then device complexity is reduced, but measurement opportunities are limited and measurement precision decreases
Solution Approach 1:
The patent implements dynamics by making the receive beam configuration adaptive rather than static. The UE dynamically selects and switches between the first receive beam and second receive beam based on the specific SSB duration being measured. This dynamic beam switching enables the system to optimize measurement precision for different cells and conditions while maintaining manageable device complexity through structured beam management.
Solution Approach 2:
The patent applies local quality by assigning different receive beams to different SSB durations based on specific measurement requirements. The first receive beam is optimized for the first SSB duration while the second receive beam is optimized for the second SSB duration, allowing each beam to be locally optimized for its specific measurement task, thereby improving overall measurement precision without requiring complete system redesign.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for receive beam switching for neighbor cell measurement. A method that may be performed by a user equipment (UE) includes determining a first receive beam of a plurality of receive beams to use for reception during a first synchronization signal block (SSB) duration within a synchronization signal block set (SSBS) duration. The method includes determining a second receive beam of the plurality of receive beams to use for reception during a second SSB duration within the SSBS duration. The UE may measure one or more first signals transmitted by a serving cell and/or one or more neighbor cells with the first receive beam during the first SSB duration and measure one or more second signals transmitted by the serving cell and/or the one or more neighbor cells with the second receive beam during the second SSB duration.