Mono-static RF Sensing Coordination in Cellular Networks
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Solution Overview
Problem
Current 5G wireless communication systems face challenges in achieving high spectral efficiency and reducing latency while managing radio frequency interference, which affects the accuracy of mono-static radio frequency sensing in cellular networks.
Innovation Solution
A network entity coordinates the configuration of cellular network signals for radio frequency sensing apparatuses to minimize interference, determining optimal signal configurations and transmitting configuration messages to ensure accurate mono-static radio frequency sensing by considering interference thresholds, signal capabilities, and object tracking parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple cellular network signals are transmitted simultaneously for sensing purposes, then the coverage and sensing capability are improved, but the interference between signals increases and measurement accuracy deteriorates
Solution Approach 1:
The network entity configures different periodicities for sensing signals transmitted by different apparatuses. First apparatus transmits sensing signals with a first periodicity while second apparatus transmits with a second periodicity, ensuring their signals do not overlap in time. This periodic scheduling allows multiple apparatuses to contribute to sensing coverage without causing interfering signals that would degrade measurement accuracy.
Solution Approach 2:
The network entity dynamically adjusts the configuration of sensing signals based on the specific scenario and interference conditions. It can modify periodicity, time offsets, and other parameters adaptively to optimize the balance between sensing coverage and interference mitigation, allowing the system to respond to changing environmental conditions and traffic patterns.
2Measurement precision
If sensing signal transmission is increased to improve object tracking, then the sensing accuracy is improved, but the interference with communication signals increases
Solution Approach 1:
The network entity segments the time-frequency resources by configuring different periodicities and time offsets for sensing signals from different apparatuses. This segmentation distributes sensing transmissions across different time slots, reducing the probability of collision with communication signals while maintaining adequate sensing accuracy through sufficient sampling frequency.
Solution Approach 2:
The network entity performs preliminary configuration and coordination of sensing signal parameters before actual transmission begins. By pre-calculating and assigning optimal periodicities and time offsets that avoid known communication signal patterns, the system proactively minimizes interference while ensuring sensing accuracy requirements are met.
3Device complexity
If mono-static radio frequency sensing is implemented without coordination, then the device complexity is reduced, but the interference management capability deteriorates
Solution Approach 1:
The network entity acts as an intermediary that coordinates sensing signal configurations between multiple apparatuses. It receives sensing capabilities and requirements from each apparatus, calculates appropriate periodicities and time offsets to avoid interference, and distributes optimized configurations back to the apparatuses. This centralized coordination approach maintains low device complexity while significantly improving interference management reliability.
Data Source
AI summary
A mono-static radio frequency sensing coordination method includes: determining, by a network entity for a first apparatus that is a first radio frequency sensing apparatus, a first configuration of a first cellular network signal for mono-static radio frequency sensing such that the first cellular network signal has expected interference of less than a threshold interference due to transmission of a second cellular network signal from a second apparatus that is separate from the first apparatus; and transmitting, from the network entity to the first apparatus, a first configuration message indicating for the first apparatus to use the first configuration of the first cellular network signal for monostatic radio frequency sensing.