Single-Sided Beam Management for Bistatic mmW RF Sensing
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Solution Overview
Problem
Current wireless communication systems, particularly in the 5G era, face challenges in efficiently managing beams for bistatic radio frequency sensing to effectively track targets using millimeter wave (mmW) RF signals, which is crucial for applications like health monitoring, gesture recognition, and automotive radar, due to the complexity of multipath signals and the need for accurate range detection.
Innovation Solution
The implementation of single-sided beam management in bistatic radio frequency sensing, where base stations transmit scanning reference signals, receive beam reports from user equipment, and configure tracking reference signals based on these reports to identify and track target groups, utilizing signals like positioning reference signals, tracking reference signals, and channel state information reference signals, to enhance detection capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If traditional beam management methods are used for bistatic RF sensing, then target tracking capability is provided, but messaging overhead is excessive and spectral efficiency is reduced
Solution Approach 1:
The patent combines scanning reference signals and tracking reference signals into a unified beam management framework. The base station transmits both types of signals using the same beam configuration, and the user equipment processes both signals together to identify target groups, thereby reducing the number of separate signaling messages and improving spectral efficiency
Solution Approach 2:
The scanning reference signal is designed to serve dual purposes: it performs the traditional function of beam scanning and identification, and simultaneously enables target group identification for RF sensing applications. This multi-functionality eliminates the need for separate dedicated scanning and tracking procedures, reducing messaging overhead
2Measurement precision
If multiple reference signals are transmitted for each target group, then tracking accuracy is improved, but signaling complexity and overhead increase
Solution Approach 1:
The patent segments targets into target groups based on spatial characteristics and signal properties. Instead of managing individual targets separately, the system groups them and applies unified beam management procedures to each group, reducing signaling complexity while maintaining tracking accuracy through group-level reference signals
Solution Approach 2:
The base station performs preliminary beam configuration and target group identification using scanning reference signals before initiating tracking. This preliminary action establishes the beam settings and target group assignments in advance, allowing subsequent tracking to proceed with reduced signaling overhead
Data Source
AI summary
Techniques are provided for single sided beam management in a millimeter wave (mmW) communication system for use in bistatic radio frequency (RF) sensing. An example method of tracking targets with bistatic radio frequency sensing includes receiving a scanning reference signal, generating a scanning signal report indicating one or more target groups associated with the scanning reference signal, transmitting the scanning signal report, receiving tracking signal configuration information indicating a tracking reference signal associated with the one or more target groups, receiving the tracking reference signal identified in the tracking signal configuration information, and tracking the one or more target groups associated with the tracking reference signal.