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Vehicle-mounted device, portable device, and vehicle wireless communication system

A technology for portable equipment and vehicle-mounted devices, which is applied in the field of communication to achieve the effect of reducing risk

Inactive Publication Date: 2018-08-03
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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  • Vehicle-mounted device, portable device, and vehicle wireless communication system
  • Vehicle-mounted device, portable device, and vehicle wireless communication system
  • Vehicle-mounted device, portable device, and vehicle wireless communication system

Examples

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Embodiment Construction

[0022] Before describing the embodiments of the present invention, conventional problems 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.

[0023] The present disclosure has been made in view of such a situation, and an object thereof is to provide a technique for reducing the risk of a relay attack when a door lock is unlocked.

[0024] 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 ...

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Abstract

An LF transmitter of a vehicle-mounted device transmits a request signal, a first-time measurement signal, and a second-time measurement signal to a portable device. Here, the LF transmitter transmitsthe second-time measurement signal to a portable device by a transmission strength that is different from the transmission strength of the first-time measurement signal. A UHF receiving unit of the vehicle-mounted device receives from the portable device a response signal which includes information relating to the reception strength of the first-time measurement signal, and information relating to the reception strength of the second-time measurement signal. A determination with respect to the portable device is made based on the relationship between the information relating to the receptionstrength of the first-time measurement signal and information relating to the reception strength of the second-time measurement signal which are included in the response signal received in the UHF receiving unit, and the relationship between the transmission strength of the first-time measurement signal and the transmission strength of second-time measurement signal which are transmitted from theLF transmitter.

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 Applications(China)
IPC IPC(8): B60R25/24E05B49/00H04Q9/00
CPCB60R25/24G07C2009/00325G07C2009/0038G07C9/00309G07C2009/00555G07C2209/63G08C25/02H04Q9/00G07C9/28G07C2009/00396
Inventor 林直树
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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