Vehicle Controller QoS Management for Impact Events
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Solution Overview
Problem
Modern vehicles face unacceptable performance issues during transients due to shared data connections being used for both occupant and emergency communications, which can limit bandwidth and reduce data throughput for essential vehicular data transmission.
Innovation Solution
A vehicle controller is configured to limit internet protocol traffic through a wireless access point based on vehicle impact, allowing users to select and prioritize messages by categorizing and managing data access, ensuring quality of service for emergency communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a shared data connection is provided for both occupant and emergency communications, then connectivity and versatility are improved, but data throughput and quality of service for emergency messages deteriorate during transients
Solution Approach 1:
The system dynamically adjusts traffic prioritization based on vehicle status. During normal operation, standard traffic handling applies. Upon detecting a transient event (impact, airbag deployment), the system automatically switches to emergency mode where critical vehicular messages are prioritized over occupant communications, ensuring quality of service for safety-critical data while maintaining shared connectivity infrastructure
Solution Approach 2:
The system changes network parameters (traffic prioritization levels, bandwidth allocation) based on vehicle event status. When a transient is detected, the controller modifies QoS parameters to guarantee minimum data rates for vehicular emergency messages, while adjusting or limiting IP traffic from mobile devices. This parameter adaptation resolves the contradiction by maintaining versatility through conditional parameter changes rather than structural modifications
2Ease of operation
If internet protocol traffic from multiple mobile devices is allowed through the wireless access point, then ease of operation and user convenience are improved, but quality of service for critical vehicular messages deteriorates during impacts
Solution Approach 1:
The system segments network traffic into distinct categories: critical vehicular messages (emergency data, sensor information) and occupant IP traffic (web browsing, messaging, streaming). During transient events, the controller applies different QoS policies to each segment, guaranteeing bandwidth and priority for vehicular messages while selectively limiting or throttling occupant traffic. This segmentation allows user convenience to be maintained during normal operation while ensuring reliability during emergencies
Solution Approach 2:
The wireless access point controller acts as an intermediary between mobile devices and the network. It monitors vehicle status and dynamically adjusts traffic flow, applying rate limiting, priority queuing, or traffic shaping to IP packets from mobile devices during transients. This intermediary function enables the system to maintain ease of operation (devices remain connected) while protecting quality of service for critical messages through intelligent traffic mediation
3Device complexity
If bandwidth is shared between occupant communications and emergency messages, then device complexity is reduced, but data transmission speed and reliability for critical messages worsen during transients
Solution Approach 1:
The wireless access point serves multiple functions: providing internet connectivity to occupant devices during normal operation and ensuring reliable transmission of emergency vehicular messages during transients. The controller implements multi-functionality by switching between standard IP routing mode (for versatility) and QoS-guaranteed mode (for reliability) based on vehicle event status. This universal design maintains low device complexity while achieving high transmission speeds for critical messages when needed
Data Source
AI summary
A vehicle includes a display including selectable indicia related to a plurality of mobile devices operable to enable a user to select a one of the plurality. The vehicle includes a controller configured to limit internet protocol traffic of the one traversing through a wireless access point within the vehicle to preserve quality of service for messages sent via the wireless access point related to the impact. The limitation is responsive to impact of the vehicle.