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In-vehicle device, portable device, and vehicle wireless communication system

A technology of wireless communication system and portable equipment, which is applied in the field of vehicle wireless communication system to achieve the effect of reducing the risk

Active Publication Date: 2020-02-28
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As an improper use of the keyless operating system, there is a relay attack (relay attack)

Method used

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  • In-vehicle device, portable device, and vehicle wireless communication system
  • In-vehicle device, portable device, and vehicle wireless communication system
  • In-vehicle device, portable device, and vehicle wireless communication system

Examples

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Embodiment Construction

[0027] Before describing the embodiments of the present invention, problems of the conventional technology will be briefly described. The signal strength pattern defined between the vehicle and the electronic key is formed by combining signals above the threshold with signals below the threshold. Therefore, if the signal strength pattern and the threshold value are analyzed, the reproduction of the signal strength pattern becomes easy, and it becomes easy to be attacked by a relay.

[0028] Before concretely describing the embodiment of the present invention, an overview will be described. Embodiments of the present invention relate to a wireless communication system for a vehicle that performs communication for unlocking a door lock of a vehicle between an in-vehicle device mounted on the vehicle and a portable device (electronic key) carried by a user. As described above, the purpose of this embodiment is to reduce the risk of relay attacks when the door lock is unlocked. ...

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Abstract

The LF transmitting unit of the vehicle-mounted device transmits the request signal and the signal for the first measurement to the portable device. The UHF receiving unit of the vehicle-mounted device receives the first response signal including information on the transmission strength of the second measurement signal from the mobile device. The LF transmission unit transmits to the mobile device a second measurement signal in which transmission intensity is set based on information on transmission intensity included in the first response signal. The UHF receiving unit receives the second response signal transmitted from the mobile device based on the determination result of the second measurement signal.

Description

technical field [0001] The present invention relates to a communication technology, and more particularly, to an in-vehicle device, a portable device, and a wireless communication system for a vehicle that perform communication between an in-vehicle device mounted on a vehicle and a portable device carried by a user. Background technique [0002] In the electronic key system, there is a keyless operation system that does not require button operation of the electronic key. In this system, a requested communication area of ​​the LF (Low Frequency) frequency band is formed around the vehicle, and when the electronic key enters the communication area and receives a request, the electronic key returns a communication area of ​​the RF (Radio Frequency: radio frequency) frequency band to the vehicle. response. As a fraudulent use of the keyless operating system, there is a relay attack. In the relay attack, a malicious third person uses a repeater capable of separately relaying a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E05B49/00B60R25/24H04Q9/00H04W4/40H04W4/30H04W4/48
CPCB60R25/24H04Q9/00H04Q2209/40H04Q2209/50H04W4/48G07C9/00309G07C2009/00555H04W4/30G07C9/28G07C2009/00396
Inventor 林直树
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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