V2X Security Processing Using Time-to-Collision Filtering
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Solution Overview
Problem
The existing vehicle-to-vehicle communication systems face processor overload due to the flooding of messages requiring security verification, necessitating expensive and computationally intensive processors to handle every message received within the broadcasting range.
Innovation Solution
A method and system for selectively verifying and processing messages by evaluating the time-to-collision status and assigning an attentive factor to remote vehicles, allowing only relevant messages to undergo security processing, thereby reducing the computational load on processors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If security verification is performed on every received message, then message authentication reliability is improved, but processor load increases requiring expensive high-computational processors
Solution Approach 1:
The patent applies this principle by using inexpensive, low-computational processors that would be insufficient for verifying every message, instead relying on selective verification of only critical messages to achieve the same security goal with cheaper hardware
Solution Approach 2:
The patent changes the parameter of verification frequency from 100% (every message) to a selective proportion based on message priority and collision risk, thereby reducing processor requirements while maintaining security for critical communications
2Reliability
If all received messages are placed in queue for security verification, then message processing completeness is improved, but message processing time increases due to computational intensity
Solution Approach 1:
The patent applies partial action by verifying only a subset of messages (those with high collision risk or high priority) rather than all messages, thereby reducing processing time while still maintaining security for the most critical communications
Solution Approach 2:
The patent skips security verification for low-priority messages where verification would consume excessive time, allowing the system to process messages faster by selectively bypassing verification for non-critical communications
3Measurement precision
If every message from remote vehicles undergoes security processing, then security verification accuracy is improved, but processor cost increases to handle the computational load
Solution Approach 1:
The patent applies local quality by applying high-accuracy security verification only to specific messages from specific remote vehicles (those with high collision risk), rather than uniformly to all messages, thereby maintaining verification accuracy where needed while reducing overall processor costs
Solution Approach 2:
The patent changes the verification intensity parameter from maximum (full verification for all messages) to a variable level based on message priority and collision risk assessment, reducing the need for expensive processors while maintaining high verification accuracy for critical messages
Data Source
AI summary
A vehicle-to-vehicle communication filtering system is provided to selectively process broadcast messages between a host vehicle and a remote vehicle. A processing unit evaluates a time-to-collision status between the host vehicle and the remote vehicle sending the message. The time-to-collision status is a function of a relative distance and a relative velocity between the host vehicle and the remote vehicle which are determined from data provided within a first portion of the message received from the remote vehicle. An attentive factor is assigned to each of the remote vehicles based on the time-to-collision with respect to each remote vehicle. The attentive factor identifies a proportion of messages broadcast from the remote vehicle to be targeted for security processing. Security processing of the message is performed based on a second portion of the message unless the attentive factor indicates the message should be ignored.