Vehicle Head Unit Boot Sequence Prioritization

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Solution Overview

Problem

Existing motor vehicle head units experience slow response times for remote operation commands, leading to user dissatisfaction due to prolonged processing times when transitioning from a dormant to an awake operation mode.

Innovation Solution

The head unit employs a boot-loader application that prioritizes the initiation of the remote operations event handling application upon waking up, establishing a wireless data communication link and concurrently initiating other applications like the backup camera and navigation applications, utilizing a publish-subscribe messaging protocol to accelerate command response times.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the head unit transitions from dormant to awake operation mode using conventional boot sequence, then all applications are initiated, but the command response time is excessively long (90 seconds from sleep mode)

Engineering Contradiction:

Improvecommand response timeVSAvoidtime to transition from dormant to awake mode

Core Design Contradiction:

SpeedVSLoss of time

Solution Approach 1:

The system performs preliminary actions by pre-establishing the wireless data communication link and pre-initiating the remote operations event handling application during the wake-up process, before other applications are started. This allows the system to be prepared to receive and process remote commands immediately upon becoming fully awake, significantly reducing the effective response time from 90 seconds to 15 seconds.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The boot sequence is made dynamic and adaptive based on the wake-up reason. When woken by a high priority SMS message, the system dynamically reorders the initialization sequence to prioritize remote operations capabilities. The system can adapt its behavior based on operational context, initiating different applications in different orders depending on the wake-up trigger.

Inventive Principle:

Principle #15Dynamics

2Speed

If the head unit prioritizes remote operations application initiation, then command response time is reduced, but the system complexity increases due to conditional boot sequencing

Engineering Contradiction:

Improvecommand response timeVSAvoidboot sequence management complexity

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

The system changes the parameter of application initiation priority based on the wake-up reason. When the wake-up reason indicates a high priority SMS message, the system parameter for remote operations application initiation is changed to highest priority. This parameter change approach allows flexible response time optimization without requiring complex structural modifications to the boot system.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS9649999B1Vehicle remote operations control

Publication Date: 2017.05.16 T MOBILE INNOVATIONS LLC

AI summary

A head unit for a motor vehicle. The head unit comprises a processor, a memory, a radio frequency transceiver, a backup camera application, a navigation application, a remote operations event handling application stored in the memory that handles remote operation commands received via the radio frequency transceiver, and a boot-loader application. When executed by the processor the boot-loader application causes the processor to initiate execution of the remote operations event handling application and, after causing the processor to initiate execution of the remote operations event handling application, causes the processor to initiate execution of the backup camera application and execution of the navigation application.