TDoA Positioning Correction for Anchor Height Mismatch
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately and efficiently measuring the position of user equipment (UE) in scenarios involving vehicle-to-everything (V2X) communication, particularly in next-generation radio access technologies like NR, where precise location information is crucial for applications such as vehicle platooning, advanced driving, and remote driving.
Innovation Solution
A method and apparatus for measuring UE position using Time Difference of Arrival (TDoA) positioning with vector correction fields, which involves acquiring anchor list information, calculating initial positions, and applying correction vectors based on the arrangement of selected anchors to enhance accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If TDoA positioning is performed using three anchors without considering heights, then calculation complexity is reduced and processing speed is improved, but position measurement precision deteriorates
Solution Approach 1:
The patent pre-calculates and stores correction vectors in a lookup table during system initialization or offline preparation. These correction vectors correspond to different anchor height configurations. During actual positioning operations, the system simply retrieves the appropriate correction vector from the pre-prepared table based on the current anchor arrangement, avoiding real-time complex calculations while maintaining high positioning accuracy
Solution Approach 2:
The patent introduces correction vectors as a parameter adjustment mechanism. Instead of performing full 3D TDoA calculations considering anchor heights, the system calculates initial position based on 2D assumptions and then applies correction vectors to adjust the position parameters. This transforms a complex 3D calculation problem into a simpler 2D calculation plus parameter correction approach
2Measurement precision
If vector correction fields are applied to correct position values, then position measurement precision is improved, but device complexity and processing overhead increase
Solution Approach 1:
The patent pre-calculates correction vectors for various anchor height configurations and stores them in lookup tables during system initialization. This preliminary preparation eliminates the need for complex real-time calculations, as the system only needs to retrieve the appropriate correction vector based on the current anchor arrangement, thereby reducing processing overhead while maintaining high precision
Solution Approach 2:
The patent introduces correction vectors as an intermediary element between the simple 2D TDoA calculation and the accurate 3D position. Instead of directly performing complex 3D calculations, the system uses correction vectors as a mediator to adjust the 2D position results, simplifying the overall system architecture while achieving high precision
Data Source
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AI summary
According to various embodiments, disclosed are a method, performed by a terminal, for measuring a position in a wireless communication system, and an apparatus therefor. Disclosed are a method and an apparatus therefor, the method comprising the steps of: obtaining anchor list information about a plurality of anchors and information about vector correction fields; calculating a first position value on the basis of TDoA positioning using three anchors selected from among the plurality of anchors; on the basis of the first position value being calculated without considering the heights of the three anchors, correcting the first position value by applying, among the vector correction fields, a vector correction field corresponding to the arrangement of the three anchors; and determining the position on the basis of the corrected first position value.