RF Sensing Beam Management via Multi-Step Beamsweep
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Solution Overview
Problem
Current wireless communication systems, particularly 5G NR, face challenges in efficiently managing beams for radio frequency (RF) sensing, which affects the accuracy and effectiveness of RF sensing applications.
Innovation Solution
The proposed solution involves a method for beam management in wireless devices that performs multiple step beam management for RF sensing. This includes a first beamsweep based on different parameters than a second beamsweep, allowing for the selection of an optimal beam for RF sensing. Additionally, the method involves frequency division multiplexing of RF signals for sensing and communication, enabling efficient use of beamformed RF signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single beamsweep is performed for RF sensing, then the sensing process is simple and quick, but the beam selection accuracy and sensing precision are insufficient
Solution Approach 1:
The beam management process is segmented into multiple distinct beamsweeps, each serving a specific function. The first beamsweep identifies candidate beams, while subsequent beamsweeps refine the selection. This segmentation allows the system to achieve high beam selection accuracy through multiple specialized measurement stages rather than a single complex operation.
Solution Approach 2:
The first beamsweep performs preliminary action by identifying candidate beams and their basic characteristics before more precise measurements are taken. This preliminary identification narrows down the search space for subsequent beamsweeps, enabling accurate beam selection without requiring all beams to be measured with maximum precision simultaneously.
2Measurement precision
If multiple beamsweeps with different parameters are performed, then beam selection accuracy improves, but the time consumption and processing complexity increase
Solution Approach 1:
The first beamsweep performs preliminary identification of candidate beams using less time-consuming measurements. By identifying promising beams early with coarser parameters, the system avoids performing detailed measurements on all possible beams, thus reducing total time while maintaining high sensing accuracy for the selected beam.
Solution Approach 2:
Not all beams require the same level of measurement detail. The system applies partial action by performing comprehensive measurements only on candidate beams identified in the first beamsweep, while using quicker, less precise measurements for initial screening. This selective approach reduces overall processing time while maintaining accuracy where it matters most.
3Reliability
If RF sensing and wireless communication use separate frequencies, then interference is avoided, but spectrum efficiency and resource utilization decrease
Solution Approach 1:
The system implements multi-functionality by enabling the same frequency resources to serve both RF sensing and wireless communication purposes. Through frequency division multiplexing, the system can simultaneously perform sensing beamsweeps and communication transmissions on overlapping frequencies, making the spectrum more versatile and efficient while maintaining reliable sensing through proper signal separation and processing.
Solution Approach 2:
Frequency division multiplexing acts as an intermediary mechanism that allows sensing and communication signals to coexist on the same frequency resources. By allocating different time slots or code sequences to sensing and communication functions within the same frequency band, the system mediates between the competing requirements of sensing reliability and spectrum efficiency, enabling both functions to operate simultaneously without harmful interference.
Data Source
AI summary
A method, apparatus, or computer-readable medium with instructions for beam management for radio frequency (RF) sensing at a wireless device. The wireless device performs a first beamsweep of an RF signal and measures a reflection of the RF signal based on the first beamsweep. The wireless device performs a second beamsweep of the RF signal, wherein the first beamsweep is based on a different parameter than the second beamsweep and measures the reflection of the RF signal based on the second beamsweep. The wireless device selects a beam for RF sensing based on the first beamsweep and the second beamsweep.