NLOS Wireless Path Detection for Accurate UE Positioning
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Solution Overview
Problem
Existing wireless communication networks with network-controlled repeaters face significant positioning errors due to the lack of awareness of non-line-of-sight (NLOS) signal paths, leading to inaccurate UE localization in coverage holes.
Innovation Solution
A method and apparatus for detecting NLOS wireless signal paths by receiving positioning information, determining commonalities, and identifying the presence of NLOS paths between UEs and network nodes, utilizing network interfaces, memory, and processors to enhance UE positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network-controlled repeaters are used to maintain links in obstructed environments, then communication continuity is improved, but positioning accuracy deteriorates due to undetected NLOS signal paths
Solution Approach 1:
The patent implements feedback mechanisms where UEs report positioning measurements and signal characteristics to the network, which then determines NLOS conditions and adjusts positioning calculations accordingly. This feedback loop enables the system to correct positioning errors caused by NLOS paths while maintaining repeater-based communication continuity.
Solution Approach 2:
The patent introduces an intermediary NLOS detection mechanism that acts between the repeater-based communication system and the positioning system. This intermediary detects NLOS conditions and provides correction information, allowing the system to maintain both communication continuity through repeaters and positioning accuracy through NLOS awareness.
2Device complexity
If traditional positioning methods are used without NLOS detection, then system complexity is reduced, but positioning error increases in coverage holes with physical obstructions
Solution Approach 1:
The patent segments the positioning system into distinct functional components: signal measurement, NLOS detection, and positioning calculation. This segmentation allows the system to add NLOS detection capability without overwhelming complexity, as each component handles a specific task independently.
Solution Approach 2:
The NLOS detection function serves as an intermediary layer between traditional positioning methods and the final positioning result. It adds minimal complexity by inserting a detection and correction step that significantly reduces positioning errors in obstructed environments without requiring complete system redesign.
3Measurement precision
If NLOS detection is implemented, then positioning accuracy in obstructed environments is improved, but information processing requirements increase
Solution Approach 1:
The patent extracts only the essential information needed for NLOS detection from the positioning signal, such as signal strength, arrival time, and angle of arrival. By taking out only the critical parameters rather than processing complete signal data, the system achieves improved positioning accuracy without excessive information processing load.
Solution Approach 2:
The patent implements partial NLOS detection by focusing on key signal characteristics rather than analyzing all possible signal parameters. This partial action approach provides sufficient positioning accuracy improvement while keeping information processing requirements manageable for networked devices.
Data Source
AI summary
Techniques for detecting non-line-of-sight (NLOS) wireless signal paths are described. In some embodiments, a method thereof may include receiving positioning information from one or more networked devices, the positioning information comprising information indicative of measurements of one or more wireless signals transmitted between one or more wireless network nodes and one or more UEs, location data indicative of a location of each of the one or more UEs, or a combination thereof; determining a commonality associated with the received positioning information; and based on the determined commonality, determining that the NLOS wireless signal path is present between the given UE and the one or more wireless network nodes.