Adaptive Area Determination System for Mobile Device Presence
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Solution Overview
Problem
Existing area determination systems, such as those using beacon tags, struggle with accuracy in open spaces where walls are absent, leading to inaccuracies in determining the presence or absence of mobile devices in target areas.
Innovation Solution
An area determination system that includes a detection unit to locate mobile devices based on wireless signal strength, a first determination unit to assess presence or absence in a target area, an obtaining unit to count decisions of presence, and a control unit to adjust determination processing using time lag, predetermined length, and decision thresholds to enhance accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the technique of Patent Literature 1 is applied to open spaces without walls, then the system can operate in flexible environments, but the accuracy of determining mobile device presence deteriorates
Solution Approach 1:
The patent applies dynamics by making the determination parameters adaptive rather than fixed. The control unit dynamically adjusts the threshold value and the number of required detection occurrences based on the specific open space environment. This allows the system to adapt to different environmental conditions (improving environmental adaptability) while maintaining accurate presence determination through optimized parameters (preserving measurement precision).
Solution Approach 2:
The patent changes key parameters including the threshold value for signal strength determination and the number of required detection occurrences within a target period. By adjusting these parameters based on environmental characteristics of open spaces, the system achieves both environmental adaptability and maintained measurement precision for presence determination.
2Ease of operation
If simple signal strength threshold determination is used, then the system operation is simple, but the determination accuracy in open spaces deteriorates
Solution Approach 1:
The patent implements feedback by having the control unit adjust the threshold value and determination parameters based on detection results and environmental characteristics. The system continuously monitors the number of detection occurrences within target periods and uses this feedback to optimize the threshold and required occurrence counts, thereby maintaining simplicity of operation while improving determination accuracy in open spaces.
Solution Approach 2:
The system transitions from static threshold determination to dynamic parameter adjustment. The control unit automatically modifies the threshold value and the number of required detections based on real-time performance and environmental conditions, maintaining operational simplicity while achieving accurate presence determination in challenging open space environments.
3Measurement precision
If multiple determination parameters and control mechanisms are added to improve accuracy, then the presence determination accuracy improves, but the system complexity increases
Solution Approach 1:
The control unit serves multiple functions: it manages the threshold value, counts detection occurrences, determines presence/absence, and adjusts parameters based on environmental characteristics. By consolidating these diverse functions into a single multi-functional component, the system achieves high determination accuracy through multiple parameters without proportionally increasing overall system complexity.
Solution Approach 2:
The patent merges the threshold management, detection counting, presence determination, and parameter adjustment functions into an integrated control unit. This consolidation allows the system to employ multiple determination parameters and control mechanisms for high accuracy while minimizing the increase in system complexity through functional integration.
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
The system improves the accuracy of determining whether a mobile device is present or absent in a target area by using signal strength analysis and adaptive control mechanisms, such as extending target periods or adjusting thresholds based on continuous decisions.
Implementation Method 1
detection unit detects, based on a received signal strength of a wireless signal being transmitted and received to/from a mobile device, location of the mobile device
Data Source
AI summary
The problem is to improve the accuracy of decision about the presence or absence of mobile device in/from a target area. A detection unit detects, based on a received signal strength of a wireless signal (W10) being transmitted and received to/from a mobile device (40), location of the mobile device (40) to acquire mobile device location information. A first determination unit determines, based on the mobile device location information, whether the mobile device (40) is present in a target area. An obtaining unit obtains a number of times (n) of decisions of presence, which indicates the number of times that the first determination unit has decided that the mobile device (40) be present in the target area during a target period having a predetermined length (T). A second determination unit decides, when the number of times (n) of decisions of presence is equal to or greater than a predetermined number of times (N), that the mobile device (40) be present in the target area during the target period and decides, when the number of times (n) of decisions of presence is less than the predetermined number of times (N), that the mobile device (40) be absent from the target area during the target period. A control unit controls, using at least one selected from a time lag between multiple decisions of presence during the target period, the predetermined length (T), and the predetermined number of times (N), either determination processing by the second determination unit or decisions made by the second determination unit.