Cooperative Radio Localization via Intermediary Network Grid
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Solution Overview
Problem
Existing localization systems, both satellite and terrestrial, face challenges in accurately determining the position of radio apparatuses when they lack access to localization systems or are obstructed by natural or artificial obstacles, leading to inaccurate or unreliable position estimates.
Innovation Solution
A cooperative localization process that creates a location grid through a network of interconnected radio apparatuses, using a controller to expand the network by sending search signals and collecting distance data from responding apparatuses, forming triangles with known sides to geometrically determine the position of the apparatus in need, even in areas with limited electromagnetic visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If satellite localisation systems (GPS, GLONASS, GALILEO) are used to determine the position of a radio apparatus, then position data can be obtained with sufficient accuracy, but the system requires electromagnetic visibility from multiple satellites which is blocked by natural or artificial obstacles, and entails long initial acquisition times
Solution Approach 1:
The patent introduces intermediate reference apparatuses (cooperators) that act as mediators between the apparatus to be localized and the satellite localisation system. These cooperators establish a local reference network that provides position information when direct satellite visibility is blocked, effectively mediating the localisation function in obstructed environments
Solution Approach 2:
The patent segments the localisation function into two parts: apparatuses with localisation means (cooperators) that maintain position data, and apparatuses to be localized that query this data. This segmentation allows the system to distribute the localisation function across multiple apparatuses, enabling reliable position determination even when individual apparatuses cannot directly access satellites
2Reliability
If terrestrial localisation systems based on cellular networks are used, then position can be determined without satellites, but there is not always electromagnetic visibility between the apparatus to be localized and at least two radio stations required for triangulation or three radio stations for multilateration
Solution Approach 1:
The patent merges the functions of multiple radio apparatuses into a cooperative network where each apparatus contributes to the localisation of others. By combining the position data and identification information from multiple cooperators, the system achieves accurate position determination with reduced electromagnetic visibility requirements compared to traditional triangulation or multilateration
Solution Approach 2:
The patent creates a universal localisation approach where any radio apparatus can serve dual functions: being localized and acting as a cooperator to localize others. This multi-functionality allows the system to adapt to varying electromagnetic visibility conditions by dynamically selecting appropriate cooperators based on current communication capabilities
3Reliability
If techniques referring to just one radio station are used, then electromagnetic visibility requirements are minimized, but the position estimate accuracy is inadequate
Solution Approach 1:
The patent applies partial action by requiring the apparatus to be localized to communicate with only one cooperator at a time to obtain position data, while the cooperator itself has previously established connections with multiple other apparatuses. This partial communication requirement maintains operational reliability with minimal visibility while the cooperator's pre-established network provides the excessive data needed for accurate position calculation
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 method enables accurate positioning of radio apparatuses without relying on traditional localization systems, reducing errors and uncertainties by utilizing a network of cooperative apparatuses to calculate positions within acceptable limits, even in obstructed environments.
Implementation Method 1
a first radio system for direct, apparatus-to-apparatus transmission and reception of messages and data
Implementation Method 2
means for estimating the distance of other apparatuses that are electromagnetically visible
Data Source
Figure 1a~1b
Figure 1c~1d
Figure 2a~2b
AI summary
A cooperative localisation process is described for determining the absolute position of an apparatus to be localized, comprising a plurality of cooperating apparatuses able to cooperate, through the exchange of messages and data, in the localisation of said apparatus to be localized. The cooperating apparatuses are equipped with at least one direct, apparatus - to - apparatus radio transmission and reception system for messages and data, and means for estimating the distance between apparata of said set of cooperating apparatuses. The cooperating localisation apparatuses able to implement this process are also described.