Per-Symbol Receive Beam Switching for 5G SSB Measurement
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently switching receive beams to measure signals effectively, leading to increased time and resource requirements for beam training, especially in high-frequency bands with high propagation loss.
Innovation Solution
The method involves switching among multiple receive beams on a per-symbol basis to receive multiple broadcast signals transmitted over multiple symbols, measuring signal metrics for each beam, and selecting the optimal receive beam for communication with the base station, thereby improving the efficiency of the beam training procedure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam training is performed using traditional methods in high-frequency bands, then signal measurement can be achieved, but time consumption and resource requirements increase significantly
Solution Approach 1:
The patent segments the beam training process by dividing broadcast signals into multiple symbols transmitted over different time resources. The UE switches receive beams on a per-symbol basis to measure multiple beams simultaneously, rather than sequentially measuring all beams with a single receive beam. This segmentation of time resources and parallel measurement approach significantly reduces beam training time while maintaining measurement accuracy.
Solution Approach 2:
The base station performs preliminary action by pre-configuring multiple broadcast signals with different transmit beams and transmitting them across multiple symbols before the UE needs to complete beam training. This allows the UE to have multiple measurement opportunities available in advance, enabling faster beam selection without compromising measurement precision.
2Productivity
If multiple receive beams are switched on a per-symbol basis to measure multiple broadcast signals, then beam training efficiency improves, but device complexity increases
Solution Approach 1:
The patent implements dynamic receive beam switching where the UE changes its receive beam configuration on a per-symbol basis to match the transmit beam of each broadcast signal. This dynamic adaptation allows efficient parallel measurement of multiple beams while the system manages the complexity through structured beam switching patterns and associations between symbols and beams.
Solution Approach 2:
The system employs feedback mechanisms where the UE measures signal metrics for each receive beam and reports measurements back to the base station. The base station uses this feedback to determine the optimal beam pair, allowing the system to manage complexity by focusing detailed measurement and decision-making at the base station while the UE performs standardized beam switching operations.
3Device complexity
If traditional beam measurement methods are used, then implementation is simpler, but communication reliability decreases in high-frequency environments
Solution Approach 1:
By segmenting the measurement process across multiple symbols and allowing multiple receive beams to measure different transmit beams simultaneously, the system achieves more comprehensive beam pair evaluation. This segmentation enables better identification of reliable beam pairs in high-frequency environments with high propagation loss, improving communication reliability while maintaining manageable complexity through structured implementation.
Data Source
AI summary
Aspects described herein relate to receiving, from a base station, a transmit beam including a synchronization signal block (SSB) of multiple broadcast signals transmitted over multiple symbols, wherein receiving the transmit beam includes switching among multiple receive beams for each of the multiple symbols to receive a corresponding broadcast signal of the multiple broadcast signals, measuring a signal metric of each of the multiple broadcast signals as received via a corresponding receive beam of the multiple receive beams in a corresponding symbol of the multiple symbols, and selecting, based on the signal metric measured for each of the multiple broadcast signals, a receive beam of the multiple receive beams for communicating with the base station.