Estimation and Identification System Using Wave Reflection
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Solution Overview
Problem
Existing RSSI fingerprinting techniques face challenges in accurately estimating the positions of radio communication terminals, especially in environments with changing indoor conditions, and require extensive database updates, making it difficult to track multiple individuals with similar physical characteristics in settings like preschools or daycare centers.
Innovation Solution
An estimation and identification system that combines tracking devices emitting electromagnetic waves or sound waves with radio communication devices to detect and identify targets based on reflected waves and radio communication information, using analysis circuitry to link detection positions with radio communication terminals and rank identification probabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If RSSI fingerprinting is used for position estimation, then position estimation can be performed using existing radio communication infrastructure, but measurement precision deteriorates in environments with changing indoor conditions
Solution Approach 1:
The patent combines tracking device detection positions with radio communication device estimation positions through analysis circuitry. This merging of multiple detection methods compensates for the weaknesses of RSSI fingerprinting in changing environments while maintaining adaptability to existing infrastructure.
Solution Approach 2:
The analysis circuitry acts as an intermediary that processes and correlates data from both tracking devices and radio communication devices. It ranks identification probabilities and determines final positions, mediating between the two detection systems to achieve improved precision.
2Measurement precision
If multiple tracking devices are deployed to track multiple identification targets, then identification accuracy improves, but device complexity increases
Solution Approach 1:
The analysis circuitry performs multiple functions: it processes tracking device detection data, processes radio communication device estimation data, ranks identification probabilities, and determines final positions. This multi-functionality reduces the need for separate dedicated systems for each task.
Solution Approach 2:
The system uses the radio communication terminals themselves to provide identification information that helps track multiple targets. The tracking devices and radio communication devices work together where each system's data complements the other, reducing the complexity burden of having multiple tracking devices.
3Ease of operation
If RSSI fingerprints are collected and registered in a database for pattern matching, then position estimation can be performed, but loss of time occurs due to extensive database updates in changing environments
Solution Approach 1:
The system collects RSSI fingerprints in advance and registers them in a database before actual position estimation is needed. This preliminary preparation allows the system to quickly perform pattern matching during operation without requiring frequent database updates, reducing time loss in changing environments.
Solution Approach 2:
The system uses tracking device detection positions as feedback to verify and refine radio communication device position estimations. This real-time feedback mechanism reduces reliance on frequent database updates by using current spatial information to validate and adjust position estimates.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system provides improved accuracy in estimating and identifying multiple targets by combining detection positions with radio communication data, allowing for more precise tracking and behavioral analysis of individuals, even in environments with limited access points and changing conditions.
Implementation Method 1
detects a position of an identification target holding a radio communication terminal, based on a reflected wave of the electromagnetic wave or the sound wave by the identification target
Data Source
AI summary
Provided is an improved estimation and identification device that estimates the position of a plurality of identification targets and identifies the plurality of identification targets. The estimation and identification device has a configuration comprising: a plurality of tracking devices that emit electromagnetic waves or sound waves and detect the position of an identification target on the basis of reflected electromagnetic waves or sound waves from the identification target holding a wireless transmission terminal; a plurality of wireless communications devices that wirelessly communicate with wireless communications terminals and receive identification information for the wireless communications terminals from the wireless communications terminals; and an analysis circuit that identifies the identification target and estimates the position of the identification target, on the basis of the results of the wireless communications results, the detected position of the identification target, and the identification information.