Encounter Record Validation for Road Use Charging
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Solution Overview
Problem
Existing road user pricing systems fail to adequately address privacy, fairness, cost, and environmental concerns, particularly due to the need for intrusive roadside equipment and tamper-proof onboard units, which can lead to fraudulent recording and high costs.
Innovation Solution
A method where vehicles periodically broadcast their data, including position and registration details, for detection by nearby vehicles, generating encounter records that are sent to a controller for determination of compliance, with pricing discounts encouraging diligent recording and uploading, and a system for detecting anomalies in data to ensure fairness and reduce the need for extensive roadside equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tamper-proof onboard units with smart cards are installed in each vehicle, then fairness in road user pricing is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the enforcement function from physical roadside equipment and relocates it to the communication protocol and data validation mechanisms. The onboard unit no longer needs complex tamper-proof hardware because the system validates compliance through cryptographic verification of encounter records and position data, removing the need for expensive smart cards and roadside readers.
Solution Approach 2:
The patent replaces the mechanical/tamper-proof hardware system with a software-based cryptographic verification system. Instead of relying on physically secure smart cards that can be lost or stolen, the system uses digital signatures and encrypted encounter records that provide equivalent security through mathematical proofs of compliance.
2Reliability
If pervasive roadside equipment is deployed for enforcement, then detection of evasion is improved, but cost and environmental impact increase
Solution Approach 1:
The patent implements a self-enforcing system where vehicles automatically generate and exchange encounter records with nearby vehicles through broadcasting and detecting mechanisms. The system serves its own enforcement function through peer-to-peer validation of position data and encounter records, eliminating the need for external roadside enforcement equipment.
Solution Approach 2:
The patent introduces encrypted encounter records as an intermediary that mediates between vehicles and the enforcement system. These records contain verified position and encounter data that can be validated remotely without requiring physical roadside equipment, acting as a digital intermediary that carries proof of compliance.
3Reliability
If onboard units are made tamper-proof, then fraudulent recording is reduced, but loss of on board unit smart card leads to unfair penalization
Solution Approach 1:
The patent creates cryptographic copies of compliance proof in the form of encrypted encounter records that are stored in the cloud. If the onboard unit is lost or damaged, the vehicle owner can recover their compliance history by accessing these encrypted records from the server, eliminating the risk of permanent data loss associated with physical smart cards.
4Ease of operation
If pre-payment cards are used, then road use charging is simplified, but large deposit is required and overspending cannot be detected
Solution Approach 1:
The patent implements continuous feedback through automatic uploading of encounter records to the server. The system monitors usage in real-time by comparing encounter records against the account balance, providing feedback to both the user and the system about spending status. This eliminates the need for large deposits while preventing overspending through automated monitoring and alerts.
Data Source
AI summary
A method for processing road use data. A first moving vehicle has an encounter with vehicles in motion. An apparatus in the first vehicle generates and stores encounter records for the encounters. Each encounter record includes a location of the first moving vehicle and a location and identifier of a corresponding vehicle in motion, and is stored in the apparatus. A first encounter record for an encounter between the first moving vehicle and a second moving vehicle is sent by the first moving vehicle to a charging system of a road use charging authority having a data store. If the charging system determines that the data store includes a second encounter record of the encounter received from the second moving vehicle, then the second encounter record is not used in a charging process and/or is deleted from the data store; otherwise, the first encounter record is stored in the data store.