Mobile Positioning Node Selection for Collinearity and GDOP
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Solution Overview
Problem
Existing positioning technologies in mobile communication systems face challenges with high geometric dilution of precision (GDOP) due to collinear nodes, leading to reduced positional accuracy of target devices.
Innovation Solution
A method and apparatus for detecting collinearity among nodes in a positioning session, adding new nodes to form a subsequent session to improve accuracy, using sidelink communications and multilateration techniques to determine the target device's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If positioning is performed using existing nodes in a mobile communication system, then the positioning function is provided, but the positional accuracy deteriorates due to high geometric dilution of precision (GDOP) caused by collinear nodes
Solution Approach 1:
The positioning system dynamically selects and updates nodes based on their geometric distribution relative to the target device. When collinearity is detected among existing nodes, the system automatically replaces them with new nodes that have better spatial distribution, making the node configuration adaptive and dynamic rather than static.
Solution Approach 2:
The system changes the parameter of node selection by introducing a collinearity check criterion. Nodes are selected not just based on signal strength or availability, but by evaluating their angular separation from other nodes relative to the target device, thereby changing the selection parameters to optimize geometric distribution.
2Measurement precision
If new nodes are added to replace collinear nodes, then positional accuracy is improved by reducing GDOP, but the complexity of the positioning session management increases
Solution Approach 1:
The system implements feedback through continuous monitoring of node geometric distribution. The target device or positioning management entity calculates angles between nodes and detects collinearity conditions, then feeds this information back to trigger node replacement decisions, creating a closed-loop control system that automatically maintains optimal geometry.
Solution Approach 2:
The positioning system performs self-diagnosis by automatically detecting collinearity among nodes and self-corrects by selecting alternative nodes without requiring external intervention. The target device or positioning entity autonomously manages the node selection process based on real-time geometric evaluation.
Data Source
AI summary
An apparatus, method and computer program are disclosed relating to positioning in a mobile communication system. One operation of the method may comprise receiving, by a target device of a mobile communications network, reference data from each of a plurality of nodes associated with a first positioning session, the reference data from a particular node representing the position of the particular node. Another operation may comprise determining, by the target device, for each of a plurality of pairs of the nodes, whether first and second nodes of the pair are collinear based at least in part on the reference data from the first and second nodes. Another operation may comprise, responsive to determining that at least one of the pairs has collinear first and second nodes, adding of one or more new nodes, not associated with the first positioning session, to a subsequent positioning session with at least some nodes of the first positioning session, wherein the nodes are configured to transmit positioning signals to the target device for the target device to determine its own position.