V2X GPS Spoofing Detection via Fixed Node Verification
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Solution Overview
Problem
The challenge is to derive reliable location information by a Vehicle-to-Everything (V2X) User Equipment (UE) in a wireless communication system while ensuring the integrity of GPS signals, particularly in the presence of potential spoofing attacks.
Innovation Solution
The method involves receiving a GPS signal, determining whether it is spoofed based on information from a fixed node, which includes GPS signal reception related information, location information, and time stamp information, and deriving location information only when the signal is deemed authentic. This is achieved through comparisons of Doppler shifts, spatial correlations, carrier phase shifts, carrier-to-noise-density ratios, and time stamp matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GPS signal is received for location derivation, then location information can be obtained, but the signal may be spoofed leading to unreliable location data
Solution Approach 1:
A fixed node acts as an intermediary between GPS satellites and V2X UEs. The fixed node receives GPS signals, verifies their authenticity by comparing with stored reference information, and relays verified signal information to UEs. This intermediary mechanism filters out spoofed signals before they reach the UE, solving the reliability problem without requiring complex verification at the UE end.
Solution Approach 2:
The fixed node performs preliminary verification of GPS signals before they are used by V2X UEs. By pre-checking signal authenticity using stored reference data (ephemeris, clock corrections, etc.) and comparing received signals against these references, the system eliminates spoofed signals in advance, preventing unreliable location data from being generated.
2Reliability
If GPS signal authentication is performed using fixed node information, then signal authenticity can be verified, but the system complexity increases
Solution Approach 1:
The fixed node serves as a centralized authentication intermediary that handles all complex verification operations. Instead of distributing complex authentication logic to multiple UEs, the fixed node集中 performs signal verification using stored reference information and simple comparison operations, reducing individual UE complexity while maintaining system-wide reliability.
Solution Approach 2:
The system implements feedback by having the fixed node continuously monitor GPS signals, compare them with stored reference information, and adjust its verification decisions based on the comparison results. This feedback mechanism enables automatic detection of spoofing attempts without requiring complex real-time analysis at each UE, simplifying the overall system architecture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively determines the authenticity of GPS signals, ensuring the reliability of derived location information and preventing spoofing attacks, thereby providing accurate positioning in V2X communication systems.
Implementation Method 1
determining whether the GPS signal is spoofed based on information received from a fixed node... comparisons of Doppler shifts
Data Source
AI summary
An embodiment of the present invention provides a method for a vehicle-to-everything (V2X) terminal deriving location information by means of receiving a global positioning system (GPS) signal in a wireless communication system. The method, for deriving location information, comprises the steps of: receiving a GPS signal; determining, on the basis of information received from a fixed node, whether or not the GPS signal has been spoofed; and, if the GPS has not been spoofed, deriving location information from the GPS signal, wherein the information received from the fixed node is one of GPS signal reception-related information of the fixed node, location information of the fixed node and time stamp information of the fixed node.