In-Vehicle Security Event Response When Wireless Links Fail

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Solution Overview

Problem

Existing vehicle security systems fail to address security events when wireless communication with a security center is unavailable, such as in radio wave blind spots or when the wireless function is broken, leading to a risk of unaddressed dangerous states.

Innovation Solution

An information processing device that acquires security event information from onboard ECUs and, in cases of communication failure, notifies internal vehicle destinations with predetermined response instructions or information, enabling local response to security events.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If wireless communication is used to notify security events to the security center, then security events can be addressed centrally, but the system fails when wireless communication is unavailable (radio wave blind spots, broken wireless function)

Engineering Contradiction:
Improvesecurity event response reliabilityVSAvoidcommunication system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The notification section is pre-configured with multiple notification destinations (both external security center and internal vehicle destinations). When a security event occurs, the system attempts notification in a predetermined sequence. If the primary wireless communication path fails, the system automatically switches to alternative notification paths without requiring complex real-time decision-making, thereby maintaining reliability while avoiding excessive system complexity.

Inventive Principle:
Principle #10Preliminary action

2Reliability

If security event information is transmitted to the security center, then centralized security monitoring is achieved, but communication failure leaves security events unaddressed

Engineering Contradiction:
Improvesecurity event notification reliabilityVSAvoidsecurity event information loss
Core Design Contradiction:
ReliabilityVSLoss of information

Solution Approach 1:

Different notification destinations are assigned different roles and receive different types of information. External destinations (security center) receive comprehensive security event information for centralized monitoring. Internal destinations (in-vehicle display, audio output) receive simplified notifications and response instructions for immediate local action. This differentiation ensures that even if external communication fails, critical security information is still delivered locally, preventing information loss while maintaining reliable notification through multiple channels.

Inventive Principle:
Principle #3Local quality

3Ease of operation

If only wireless communication with security center is used, then system simplicity is maintained, but response capability is lost when communication fails

Engineering Contradiction:
Improvesecurity response capabilityVSAvoidnotification system complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The notification section is designed to autonomously determine notification destinations and execute notifications without requiring complex external control or manual intervention. When a security event is detected, the notification section automatically attempts to notify the security center via wireless communication, and if that fails, automatically switches to internal vehicle notification methods. This self-service capability maintains ease of operation while ensuring response capability is preserved even when communication fails, without adding significant system complexity.

Inventive Principle:
Principle #25Self-service

Data Source

PatentUS12581293B2Device, system, method, and program for responding to security events in a vehicle when wireless communication with a security center cannot be performed
Publication Date: 2026.03.17 TOYOTA JIDOSHA KK
  • US12581293B2 patent drawing
  • US12581293B2 patent drawing
  • US12581293B2 patent drawing

AI summary

An information processing device, comprising a processor, wherein the processor is configured to: acquire security event information for a vehicle from another information processing device installed in the vehicle; and in cases in which wireless communication with a security center cannot be performed, notify a destination inside the vehicle of at least one of a response instruction, which is predetermined according to the security event information, or the security event information.