Wireless Environment Evaluation via Movable Scatterer Position Estimation
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Solution Overview
Problem
Existing wireless communication technologies face challenges in accurately predicting and maintaining communication quality in areas with movable radio wave scatterers, as they require the movable bodies to recognize and report their positions, which can lead to communication failures when this is not possible due to malfunctions or other issues.
Innovation Solution
A method and system that estimate the position of movable bodies without requiring them to recognize or report their own position, using a computational resource to construct a structural model of electromagnetic wave scatterers and calculate electromagnetic field characteristics, allowing for the prediction of communication performance in wireless communication environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If movable bodies recognize and report their own positions, then the structural model can be accurately updated, but communication failures occur when reporting means malfunction
Solution Approach 1:
The patent introduces measurement transceivers as intermediary devices deployed in the service area to measure electromagnetic wave characteristics. These transceivers act as mediators between the electromagnetic field and the computational resource, providing indirect information about movable body positions through measured wave parameters without requiring the movable bodies themselves to report their positions.
Solution Approach 2:
The patent replaces the mechanical/electronic position reporting system (where movable bodies must have functional reporting means) with an electromagnetic field-based measurement system. By using measurement transceivers to detect electromagnetic wave characteristics and infer positions, the system substitutes direct mechanical position reporting with indirect electromagnetic field measurement, eliminating the reliability issue when reporting means malfunction.
2Measurement precision
If the structural model is dynamically updated with movable body positions, then communication quality prediction improves, but computational resource requirements increase
Solution Approach 1:
The patent performs preliminary measurements of electromagnetic wave characteristics at multiple positions in the service area before actual communication occurs. These pre-measured data are stored and used during communication quality prediction, allowing the system to avoid complex real-time calculations while maintaining accurate predictions. The computational resource processes pre-collected measurement data rather than performing complex dynamic modeling during actual communication.
3Measurement precision
If measurement transceivers are deployed throughout the service area, then position estimation accuracy improves, but system cost increases
Solution Approach 1:
The patent designs the measurement transceivers to perform multiple functions: they measure electromagnetic wave characteristics for position estimation, and can also be used for actual wireless communication. This multi-functionality reduces the need for separate dedicated measurement devices, allowing the same transceiver hardware to serve both measurement and communication purposes, thereby reducing overall system cost.
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
Enables accurate prediction and maintenance of communication quality by dynamically identifying and reflecting the positions of movable bodies in the wireless communication environment, ensuring stable operation of wireless communication systems even when traditional reporting methods fail.
Implementation Method 1
calculate a characteristic of an electromagnetic field by using the structural model and a ray that simulates a radio wave traveling in a real space
Implementation Method 2
measure, by using a measurement transceiver deployed in the service area, an arrival direction of an electromagnetic wave received in the service area
Data Source
AI summary
The position of a movable body is estimated without requiring the movable body to recognize and report its own position, and the position is reflected in a structural model constructed in a computer for the purpose of wireless communication environment evaluation. Provided is a wireless communication environment evaluation method including using an information processing device that includes a central processing unit, an output device, an input device, and a memory device, and that is configured to provide a computational resource, in which the information processing device is configured to construct a structural model of an electromagnetic wave scatterer in the computational resource, calculate a characteristic of an electromagnetic field by using the structural model and a ray that simulates a radio wave traveling in a real space, and obtain, on the basis of a result of the calculation using a first structural model corresponding to a real space including a first object and excluding a second object and electromagnetic wave vector measurement data on a real space including the first object and the second object, position information on a position of the second object.