Vehicle and control method thereof

Patent metadata

Field	Value
Publication number	US-9783161-B2
Application number	US-201615139696-A
Country	US
Kind code	B2
Filing date	Apr 27, 2016
Priority date	Nov 10, 2015
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A vehicle includes: a Low Frequency (LF) communication unit transmitting an authentication request signal to a smart key through an LF communication network; a Radio Frequency (RF) communication unit receiving an authentication response signal from the smart key through an RF communication network; and a controller measuring an authentication response time period based on a time at which the authentication request signal is transmitted and a time at which the authentication response signal is received and determining whether authentication with the smart key is successful based on the authentication response time period.

First claim

What is claimed is:

1. A vehicle comprising:
a Low Frequency (LF) communication unit transmitting an authentication request signal to a smart key through an LF communication network;
a Radio Frequency (RF) communication unit receiving an authentication response signal from the smart key through an RF communication network; and
a controller measuring an authentication response time period between a time at which the authentication request signal is transmitted and a time at which the authentication response signal is received and determining whether authentication with the smart key is successful based on the authentication response time period.

2. The vehicle according to claim 1 , wherein the controller determines whether authentication with the smart key is successful based on a comparison between the authentication response time period and a pre-stored average response time period.

3. The vehicle according to claim 2 , wherein, when the controller determines that the authentication response time period is less than or equal to the average response time period, the controller updates the average response time period based on the authentication response time period.

4. The vehicle according to claim 3 , wherein, when the authentication response time period is less than or equal to the average response time period, the controller compares the authentication response time period to a pre-stored minimum response time period, and when the authentication response time period is less than the minimum response time period, the controller updates the minimum response time period based on the authentication response time period.

5. The vehicle according to claim 2 , wherein, when the authentication response time period is greater than the average response time period, the controller determines whether authentication with the smart key is successful based on a comparison between the authentication response time period and a pre-stored maximum response time period.

6. The vehicle according to claim 5 , wherein the authentication request signal includes information about an RF communication channel, and when the authentication response time period is greater than the maximum response time period, the controller determines whether authentication with the smart key is successful based on whether the authentication response signal has been transmitted through an RF communication channel corresponding to the information about the RF communication channel.

7. The vehicle according to claim 6 , wherein, when the authentication response signal has been transmitted through the RF communication channel, the controller updates the maximum response time period based on the authentication response time period.

8. The vehicle according to claim 5 , wherein the LF communication unit transmits the authentication request signal with a predetermined LF output intensity, and when the authentication response time period is less than or equal to the maximum response time period, the controller determines whether authentication with the smart key is successful based on the LF output intensity and information about LF reception intensity included in the authentication response signal.

9. The vehicle according to claim 8 , wherein, when a difference between the LF output intensity and the LF reception intensity corresponding to the information about the LF reception intensity is less than or equal to a reference value, the controller updates the maximum response time period based on the authentication response time period.

10. The vehicle according to claim 1 , wherein the authentication request signal includes a radio signal having a frequency band of 20 kHz to 150 kHz.

11. The vehicle according to claim 1 , wherein the authentication response signal includes a radio signal having a frequency band of 315 MHz to 433 MHz.

12. The vehicle according to claim 1 , wherein the LF communication unit transmits a scanning signal, the RF communication unit receives a scanning response signal, and when the RF communication unit receives the scanning response signal, the LF communication unit transmits the authentication request signal.

13. The vehicle according to claim 1 , wherein the authentication request signal includes information about an RF communication channel, the LF communication unit transmits the authentication request signal with a predetermined LF output intensity, and the controller determines whether authentication with the smart key is successful based on whether the authentication response signal has been transmitted through an RF communication channel corresponding to the information about the RF communication channel, and the LF output intensity and information about LF reception intensity included in the authentication response signal.

14. A method of controlling a vehicle, comprising:
transmitting an authentication request signal to a smart key through a Low Frequency (LF) communication network;
receiving an authentication response signal from the smart key through a Radio Frequency (RF) communication network;
measuring an authentication response time period between a time at which the authentication request signal is transmitted and a time at which the authentication response signal is received; and
determining whether authentication with the smart key is successful based on the authentication response time period.

15. The method according to claim 14 , wherein the determining of whether authentication with the smart key is successful comprises determining whether authentication with the smart key is successful based on a comparison between the authentication response time period and a pre-stored average response time period.

16. The method according to claim 15 , wherein the determining of whether authentication with the smart key is successful comprises:
updating the average response time period based on the authentication response time period when the authentication response time period is less than or equal to the average response time period; and
determining whether authentication with the smart key is successful based on a comparison between the authentication response time period and a maximum response time period when the authentication response time period is greater than the average response time period.

17. The method according to claim 16 , wherein:
the authentication request signal includes information about an RF communication channel, and
the determining of whether authentication with the smart key is successful comprises determining whether authentication with the smart key is successful, based on whether the authentication response signal has been transmitted through an RF communication channel corresponding to the information about the RF communication channel when the authentication response time period is greater than the maximum response time period.

18. The method according to claim 16 , wherein:
the transmitting of the authentication request signal to the smart key comprises transmitting the authentication request signal with predetermined LF output intensity, and
the determining of whether authentication with the smart key is successful comprises determining whether authentication with the smart key is successful based on the LF output intensity and information about LF reception intensity included in the authentication response signal when the authentication response time period is less than or equal to the maximum response time period.

19. The method according to claim 18 , further comprising updating the maximum response time pe

Assignees

• Hyundai Motor Co Ltd

Inventors

• Lee Jongyoung
• Lee Jihye
• Kim Sinjung

Classifications

• H04L63/0876

  based on the identity of the terminal or configuration, e.g. MAC address, hardware or software configuration or device fingerprint · CPC title

• H04W12/06 Primary

  Authentication · CPC title

• H04W4/80

  Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication · CPC title

• G07C9/00182

  operated with unidirectional data transmission between data carrier and locks · CPC title

• G07C2009/0019

  the keyless data carrier having only one limited data transmission rangs · CPC title