Cooperative Terminal Positioning for Non-Line-of-Sight Links
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Solution Overview
Problem
Existing relative positioning technologies fail to accurately determine relative location information when there is no line of sight path between two terminals, necessitating complex error elimination processes that are often ineffective.
Innovation Solution
A cooperative positioning method involving a cooperative terminal group, where terminals with line of sight paths assist in determining relative location information, bypassing the need for complex non-line of sight path error elimination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If relative positioning is performed between two terminals without a line of sight path, then positioning can still be attempted, but measurement precision deteriorates due to non-line of sight path errors
Solution Approach 1:
The patent introduces a cooperative terminal as an intermediary between the source terminal and target terminal. The cooperative terminal establishes line of sight paths with both terminals, enabling indirect relative positioning. The source terminal positions relative to the cooperative terminal, and the target terminal positions relative to the cooperative terminal, thereby avoiding direct non-line of sight path errors between source and target terminals.
2Measurement precision
If complex error elimination processes are used for non-line of sight path positioning, then positioning accuracy may be improved, but device complexity increases
Solution Approach 1:
The patent extracts the problematic non-line of sight path from the positioning system by introducing a cooperative terminal that maintains line of sight paths with both source and target terminals. This removes the need for complex non-line of sight path error elimination processes, as all positioning calculations are based on line of sight paths between terminals and the cooperative terminal.
3Measurement precision
If cooperative positioning with multiple terminals is implemented, then relative location information accuracy improves, but signaling interaction complexity increases
Solution Approach 1:
The cooperative terminal serves as a signaling intermediary that centralizes the positioning coordination. The source terminal sends positioning requests to the cooperative terminal, which then coordinates with the target terminal. This intermediary approach manages signaling interactions more efficiently than direct peer-to-peer communication between source and target terminals, especially in non-line of sight conditions.
Data Source
AI summary
A method includes: a first terminal sends first information to a second terminal. The first information includes a source terminal identifier and a target terminal identifier, and the second terminal determines relative location information between the second terminal and the first terminal in response to the first information. The second terminal sends second information to a third terminal. The second information includes the relative location information between the second terminal and the first terminal, the source terminal identifier, and the target terminal identifier, and the third terminal determines relative location information between the third terminal and the second terminal in response to the second information. There is a line of sight path between the first terminal and the second terminal, and there is a line of sight path between the second terminal and the third terminal.