Sidelink UE Identification Positioning in Dense Urban Areas
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Solution Overview
Problem
Current wireless communication systems face challenges in accurately determining the location of mobile devices, particularly in environments with non-line of sight signals and dense urban areas, leading to positioning ambiguities and errors.
Innovation Solution
The method involves utilizing a sidelink discovery interface to detect neighboring stations, obtaining identification information, and combining this with reference signal measurements to reduce ambiguity in location estimates, leveraging both terrestrial and satellite navigation techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional reference signal measurements are used for positioning, then the positioning process is simple, but positioning accuracy deteriorates in non-line of sight and dense urban environments
Solution Approach 1:
The patent combines traditional reference signal measurements with sidelink discovery signal measurements from neighboring stations to determine UE location. By merging multiple positioning approaches (network-based reference signals and device-to-device discovery signals), the system achieves improved positioning accuracy in challenging environments while managing complexity through integrated processing.
2Measurement precision
If sidelink discovery signals from neighboring stations are utilized, then positioning accuracy is improved, but system complexity increases
Solution Approach 1:
The patent introduces an identification value as an intermediary element that enables the UE to identify and utilize sidelink discovery signals from neighboring stations. This intermediary mechanism allows the system to incorporate additional positioning information from multiple sources without creating unmanageable complexity, as the identification value provides a structured way to process and differentiate signals from various neighboring stations.
3Reliability
If multiple radio access technologies are integrated for positioning, then positioning reliability is improved in diverse environments, but measurement and detection difficulty increases
Solution Approach 1:
The patent implements a universal positioning approach that works across multiple radio access technologies (LTE and NR). The method uses sidelink discovery signals that can be received from neighboring stations regardless of the specific RAT, allowing the same positioning mechanism to function reliably in diverse network environments including legacy LTE networks and next-generation NR networks.
Data Source
AI summary
Techniques are provided for utilizing a sidelink discovery interface to determine a location of a user equipment (UE). An example method for determining a location of a mobile device according to the disclosure includes receiving one or more reference signals transmitted via a first radio access technology, determining measurement values for the one or more reference signals, receiving a discovery signal from a station via a second radio access technology that is different from the first radio access technology, wherein the discovery signal includes and identification value associated with the station, and obtaining the location based at least in part on the measurement values and the discovery signal.