UE Location Verification Using PRUs Across Multi-Jurisdiction Cells
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Solution Overview
Problem
Existing communication systems face challenges in accurately verifying the location of user equipment (UE) in super-national cell coverage areas, particularly in non-terrestrial networks, where cell size spans multiple jurisdictions, leading to uncertainties in PLMN selection and potential regulatory violations.
Innovation Solution
Deploying positioning reference units (PRUs) at known locations to perform measurements and report them to a core network device, which verifies the UE's location using these measurements and measurements from the UE, ensuring trusted location information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If positioning reference units are deployed to perform measurements for location verification, then location verification accuracy is improved, but device complexity and system cost increase
Solution Approach 1:
Positioning reference units (PRUs) are deployed as intermediary devices at known locations to perform measurements and report them to the core network device. These PRUs act as mediators between the UE and the network, enabling accurate location verification without requiring complex modifications to existing network infrastructure. The PRUs measure positioning reference signals from NTN devices and provide measurement data that the core network uses to verify UE location.
2Reliability
If multiple positioning reference units are deployed across different jurisdictions, then location verification reliability is improved, but loss of information and measurement coordination difficulty increase
Solution Approach 1:
The core network device receives measurement data from multiple positioning reference units and uses this feedback to determine whether the UE is located within authorized jurisdictions. The system implements feedback mechanisms where measurement results are reported back to the core network, which then makes verification decisions. This feedback loop ensures that location verification is performed reliably across multiple jurisdictions by aggregating measurement information from various PRUs.
Data Source
AI summary
Mechanism on location verification is proposed. One or more devices at known location(s) are deployed for verifying location information of a UE. The one or more devices perform a positioning measurement and report the positioning measurement. A core network device verifies the location information based on the reported positioning measurement and positioning measurement from the UE. In this way, it ensures that the location provided by the UE is trusted.