Communication Device Position Estimation Using Distance Correction
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Solution Overview
Problem
Existing ranging technologies can only provide services based on distance measurements, making it difficult to offer more detailed situational services.
Innovation Solution
A communication device equipped with multiple wireless communication units and a control unit that estimates positional information using distance measurement values and corrects initial positional information based on subsequent measurements to provide more accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If only distance measurement values are used for positioning, then the system complexity is low, but the position estimation detail and accuracy are insufficient
Solution Approach 1:
The patent divides the positioning process into two distinct stages: initial position estimation using distance measurement values from multiple wireless communication units, and subsequent correction using other types of positional information. This segmentation allows the system to achieve detailed position estimation without requiring all complex functions to operate simultaneously, thus managing system complexity while improving measurement precision.
Solution Approach 2:
The patent performs preliminary position estimation using distance measurements before applying correction based on other positional information. This preliminary action establishes a baseline position that can be refined later, allowing the system to achieve high accuracy without requiring all measurement methods to be fully complex from the start.
2Measurement precision
If multiple wireless communication units are used for position estimation, then the position accuracy improves, but the device complexity increases
Solution Approach 1:
The patent segments the positioning function across multiple wireless communication units, where each unit independently measures distance to the other communication device. This segmentation allows the system to achieve improved position accuracy through multiple measurements while managing device complexity by giving each unit a specific, relatively simple function.
Solution Approach 2:
The wireless communication units perform multiple functions: they handle both wireless communication and distance measurement for position estimation. This multi-functionality reduces the need for separate dedicated components, thereby improving position accuracy without proportionally increasing device complexity.
3Measurement precision
If positional information is corrected using subsequent measurements, then the position accuracy improves, but the processing time increases
Solution Approach 1:
The patent performs preliminary position estimation using distance measurements before applying correction based on other positional information. This preliminary action provides an immediate position estimate that can be used quickly, while the correction process refines this estimate subsequently, balancing accuracy improvement with acceptable processing time.
Solution Approach 2:
The patent implements a feedback mechanism where previously obtained positional information is used to correct and refine position estimates. This feedback approach allows the system to progressively improve accuracy over time rather than requiring all processing to be completed simultaneously, thus managing processing time while enhancing measurement precision.
Data Source
AI summary
A communication device comprising: a plurality of wireless communication units configured to perform wireless communication with another communication device; and a control unit configured to estimate positional information indicating a position at which the other communication device is located based on at least one distance measurement value indicating a distance between the other communication device and at least one wireless communication unit and obtained through the wireless communication of each of the plurality of wireless communication units, wherein the control unit corrects first positional information among a plurality of pieces of positional information estimated at different times based on second positional information different from the first positional information among the plurality of pieces of positional information.