Presence Area Control Using Repeated Signal Estimation
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Solution Overview
Problem
Existing technologies for estimating positional relations between devices are affected by multi-path environments, leading to reduced accuracy in signal transmission and reception, particularly in scenarios with obstacles or multiple radio wave paths.
Innovation Solution
A control device and storage medium that estimate the presence area of a communication device based on signals transmitted and received between devices, with the control unit performing control based on the presence area most frequently estimated over a certain time period, reducing the influence of estimation errors caused by multi-path environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If signals are transmitted and received to estimate positional relation, then positional information can be obtained, but estimation accuracy deteriorates in multi-path environments
Solution Approach 1:
The system performs multiple presence area estimations in advance over a predetermined time period before making the final control decision. By conducting preliminary estimations repeatedly, the system collects multiple data points that can be statistically processed to identify the most reliable presence area, thereby preparing ahead of time to overcome multi-path interference effects.
Solution Approach 2:
The system uses the results of multiple presence area estimations as feedback to determine the final presence area. By comparing multiple estimation results and selecting the most frequently occurring presence area, the system creates a feedback mechanism that filters out erroneous estimations caused by multi-path interference and converges on the accurate positional relation.
2Reliability
If presence area is estimated from single signal transmission, then processing is fast, but estimation reliability is low due to multi-path effects
Solution Approach 1:
The system performs presence area estimations at periodic intervals over a predetermined time period. By conducting estimations periodically multiple times rather than continuously or once, the system balances the need for reliable data collection with time efficiency, ultimately selecting the most reliable presence area from these periodic measurements.
Data Source
AI summary
To provide a novel and improved control device and storage medium capable of performing control based on a positional relation with higher accuracy.A control device includes a control unit configured to perform control based on a presence area of a second communication device estimated using signals transmitted and received between a first communication device and the second communication device. The control unit performs control based on a presence area estimated most often among a plurality of presence areas estimated from signals transmitted and received a plurality of times during a certain time length.