Decentralized GNSS Signal Authentication Reducing Network Traffic
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing authentication solutions for GNSS signals generate significant data traffic, especially when a large number of receivers require authentication, which can lead to network saturation and increased complexity in key management and distribution.
Innovation Solution
A decentralized authentication method for GNSS signals, where user receivers can operate in two modes: one transmitting digital snapshots to an authentication center for verification, and another mode transmitting navigation information without snapshots, allowing the authentication center to manage data traffic and reduce computational load by selectively suspending snapshot transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all receivers transmit digital snapshots to the authentication center for verification, then signal authentication reliability is improved, but network data traffic increases significantly
Solution Approach 1:
The patent applies local quality by allowing receivers in different geographical locations to have different authentication modes. Receivers in areas with established authentication coverage operate in lightweight mode (no snapshot transmission), while receivers in new or unauthenticated areas transmit snapshots for verification. This spatial differentiation optimizes network traffic while maintaining authentication reliability where needed.
Solution Approach 2:
The patent implements partial action by requiring snapshot transmission only from receivers in specific situations (new locations, unauthenticated areas, or when requested by the authentication center). Most receivers operate with partial authentication verification, transmitting only essential navigation information rather than complete snapshots, thereby reducing overall network traffic while maintaining sufficient authentication coverage.
2Measurement precision
If the authentication center verifies all received navigation information with digital snapshots, then authentication accuracy is improved, but computational load on the authentication center increases
Solution Approach 1:
The patent segments the authentication process into two distinct modes: full verification mode where snapshots are transmitted and thoroughly verified, and lightweight mode where receivers transmit only navigation information for basic verification. The authentication center processes different receiver data differently based on their mode, reducing overall computational load while maintaining high accuracy for receivers undergoing full verification.
Solution Approach 2:
The authentication center performs partial verification for receivers in lightweight mode, checking only essential navigation parameters without full snapshot correlation analysis. Full verification with complete computational processing is applied only to receivers transmitting snapshots, thereby reducing the authentication center's computational load while maintaining sufficient authentication accuracy for the majority of receivers.
3Reliability
If receivers continuously transmit snapshots for authentication, then signal authenticity verification is improved, but network resource consumption increases
Solution Approach 1:
The patent implements periodic action by requiring snapshot transmission only at specific intervals or under specific conditions (when entering new geographical areas, when requested by the authentication center, or at scheduled intervals). Receivers switch to continuous lightweight operation between snapshot transmissions, significantly reducing network resource consumption while maintaining periodic authentication verification to ensure signal authenticity.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The authenticity of GNSS signals received by receivers is verified remotely by an authentication center (AC). The receivers can operate in two modes. In the first mode, a receiver sends a digital snapshot of the encrypted GNSS signals it intercepts, and the AC verifies the authenticity of the signals using this snapshot. The AC enters each successful verification into a geographic information system (GIS). In the second mode, the receiver sends its determined position and date, and the authenticity of the corresponding signals is verified using the GIS if the position and date are within the vicinity of a snapshot verification. The invention is useful in applications requiring real-time or near-real-time authentication of GNSS signals.