Mobile Positioning Integrity Check Using Uplink-Downlink Comparison
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Solution Overview
Problem
Existing mobile communication systems face challenges in ensuring the integrity and reliability of device positioning measurements, particularly in the presence of malicious user devices that can provide false information or generate jamming signals, which can compromise the accuracy and security of positioning services.
Innovation Solution
A system and method for determining the integrity of positioning measurements by comparing uplink and downlink measurement data, such as time delays and angles of arrival, to set an integrity verification notification, and using a location management function to validate the reliability of the data, thereby identifying and mitigating potential malicious activities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uplink and downlink measurement data are collected and compared to determine integrity, then positioning reliability is improved, but system complexity increases
Solution Approach 1:
The patent introduces a location management function as an intermediary component that coordinates the collection, transmission, and comparison of uplink and downlink measurement data. This mediator manages the complexity by centralizing the integrity verification process, allowing network nodes to focus on data collection while the LMF handles the comparative analysis and integrity determination.
Solution Approach 2:
The patent segments the positioning system into distinct functional components: user devices that perform measurements, communication nodes that transmit and receive signals, and a location management function that processes data. This segmentation allows each component to perform its specific function independently, reducing the complexity burden on any single element while improving overall system reliability.
2Reliability
If measurement data validation is performed to identify malicious activities, then positioning security is improved, but processing time increases
Solution Approach 1:
The patent performs preliminary actions by collecting both uplink and downlink measurement data before final positioning calculations are made. The integrity verification is conducted in advance of using the positioning data for critical functions, allowing potential malicious activities to be identified and mitigated before they can compromise positioning security.
Solution Approach 2:
The location management function provides feedback by comparing uplink and downlink measurement data to determine integrity, then using this information to validate or reject positioning measurements. This feedback mechanism allows the system to continuously monitor and adjust its positioning decisions based on the reliability of the measurement data, improving security while managing processing time through efficient verification protocols.
Data Source
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AI summary
An apparatus, method and computer program is described comprising: receiving a first measurement report from a first communication node of a mobile communication system, wherein the first measurement report includes downlink measurement data generated at a user device in response to a positioning reference signal sent by the first communication node; receiving a second measurement report from the first communication node, wherein the second measurement report includes uplink measurement data generated at the first communication node in response to an uplink reference signal sent by the user device; determining an integrity of the measurement data based on a comparison of said uplink and downlink measurement data; and setting an integrity verification notification in accordance with the determined integrity.