Anti-Spoofing Detection Using Base Station Almanac Verification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The widespread use of satellite positioning systems is compromised by spoofing, where counterfeit signals provide false location data, affecting the reliability of position calculations crucial for navigation, tracking, and various commercial and national interests, as existing methods fail to detect and mitigate such spoofing effectively.
Innovation Solution
An anti-spoofing detection system that compares position location data from multiple sources, including satellite and terrestrial systems, using a base station almanac to validate the accuracy of location predictions, discarding inconsistent data and relying on more reliable sources to estimate a trusted position, thereby preventing the use of counterfeit signals in position calculations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If satellite positioning systems are used for position determination, then position location data can be obtained, but the system becomes vulnerable to spoofing attacks that provide false location data
Solution Approach 1:
The patent introduces base station signals as an intermediary verification layer. The mobile terminal receives both satellite positioning signals and base station signals, using the base station signals as a mediator to verify the authenticity of satellite position data. The network entity compares position data from satellite sources with position data from terrestrial base stations to detect spoofing attacks.
Solution Approach 2:
The patent implements a feedback mechanism where position location data from multiple sources is continuously compared and verified. The network entity receives position data from satellite positioning systems, compares it with position data from base station signals, and provides feedback by identifying inconsistent data as potential spoofing, thereby correcting the position determination process.
2Reliability
If multiple signal sources are used to determine position, then reliability can be improved through comparison, but device complexity increases due to multiple receivers and processing requirements
Solution Approach 1:
The patent makes the mobile terminal multi-functional by enabling it to perform both satellite positioning signal reception and base station signal reception with the same device infrastructure. The wireless transceiver and processor handle multiple signal types, reducing the need for separate dedicated receivers for each positioning method.
Solution Approach 2:
The patent combines satellite positioning system functionality and terrestrial base station positioning functionality into a unified position determination process. Both signal sources are received, processed, and compared within the same mobile terminal and network entity, merging multiple positioning methods into a single integrated system.
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
Spoofing of a satellite positioning system is detected by receiving position location data from multiple sources. The received data is compared and inconsistent data is marked based on the comparison and a reliability hierarchy of the plurality of data sources.