Vehicle-Mounted Device Secure Wireless Pairing

Solution Overview

Problem

The existing methods for diagnosing vehicle faults require disassembly of internal components and connection of external diagnosing apparatus via a CAN cable, which is time-consuming and potentially damaging to the vehicle.

Innovation Solution

A vehicle-mounted device with a secure communication method that wirelessly connects with a mobile terminal, allowing access to vehicle systems based on user-selected modes (driver, repair factory, or passenger) using LTE-Direct communication, thereby avoiding physical disassembly and ensuring secure communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If an external diagnosing apparatus is connected to a data link connector through a CAN cable to read fault codes, then fault information can be accessed, but disassembly of internal components is required which is time-consuming and may cause damage to the vehicle

Engineering Contradiction:

Improvefault information accessVSAvoidrepair time

Core Design Contradiction:

Loss of informationVSLoss of time

Solution Approach 1:

The patent replaces the mechanical connection method (physical disassembly and CAN cable connection) with a wireless communication system. The diagnosing apparatus communicates with the ECU through wireless signals, eliminating the need for physical disassembly and cable connections, thereby reducing repair time and avoiding potential damage from disassembly

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a wireless communication module as an intermediary between the ECU and the external diagnosing apparatus. This module enables fault information to be transmitted wirelessly without requiring direct physical connection or disassembly of vehicle components, thus resolving the contradiction between information access and time loss

Inventive Principle:

Principle #24Intermediary (Mediator)

2Loss of information

If an external diagnosing apparatus is connected to a data link connector through a CAN cable to read fault codes, then fault information can be accessed, but disassembly of internal components is required which may cause damage to the vehicle

Engineering Contradiction:

Improvefault information accessVSAvoidvehicle damage

Core Design Contradiction:

Loss of informationVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the mechanical connection method (physical disassembly and CAN cable connection) with a wireless communication system. The diagnosing apparatus communicates with the ECU through wireless signals, eliminating the need for physical disassembly and cable connections, thereby reducing repair time and avoiding potential damage from disassembly

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a wireless communication module as an intermediary between the ECU and the external diagnosing apparatus. This module enables fault information to be transmitted wirelessly without requiring direct physical connection or disassembly of vehicle components, thus resolving the contradiction between information access and time loss

Inventive Principle:

Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This solution reduces repair time and minimizes vehicle damage by enabling secure wireless access to fault information without the need for physical connections, enhancing communication security and efficiency.

Implementation Method 1

A vehicle-mounted device with a secure communication method that wirelessly connects with a mobile terminal, allowing access to vehicle systems based on user-selected modes (driver, repair factory, or passenger) using LTE-Direct communication

Methodology Applied

Scientific EffectLTE-Direct communication: Electromagnetic Propulsion

Data Source

PatentUS10264615B1Vehicle-mounted device and secure communication method

Publication Date: 2019.04.16 HON HAI PRECISION INDUSTRY CO LTD

AI summary

A secure communication method between a vehicle-mounted diagnostic device and a mobile terminal of a user includes the device broadcasting a paging message, inviting at least one mobile terminal to send a pairing request to the vehicle-mounted device. In response to a pairing request from a mobile terminal, an inquiry signal is sent to the mobile terminal inquiring as to a pairing mode required. One of several pairing modes can be selected, each pairing mode corresponding to a preset pairing password and at least one vehicle-mounted system accessible under the pairing mode. Upon matching the pairing password from the mobile terminal with a device-stored preset pairing password corresponding to the selected pairing mode, a wireless connection between the vehicle-mounted device and the mobile terminal is made, allowing the mobile terminal to access the at least one vehicle-mounted system accessible under the selected pairing mode.