Passive entry / passive start systems and methods for vehicles

Patent metadata

Field	Value
Publication number	US-10328898-B2
Application number	US-201715730265-A
Country	US
Kind code	B2
Filing date	Oct 11, 2017
Priority date	Oct 12, 2016
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

Systems and methods for vehicle passive entry/passive start (PEPS) are provided. A communication gateway establishes a Bluetooth low energy communication connection with a portable device. A localization module determines a portable device location based on two-way ranging using impulse radio ultra-side band. The PEPS system performs vehicle functions, such as unlocking a door or trunk, allowing the vehicle to be started, or activating wireless charging, based on the portable device location. Another system includes at least one low frequency (LF) antenna configured to transmit a wireless charging ping signal within a predetermined range to a portable device configured for wireless charging. A communication gateway authenticates the portable device based on a response to the ping signal by the portable device. A PEPS performs vehicle functions, such as unlocking a door or trunk, or allowing the vehicle to be started, in response to authenticating the portable device.

First claim

What is claimed is:

1. A system comprising:
a communication gateway in a vehicle configured to establish a Bluetooth low energy (BLE) communication connection with a portable device;
at least one sensor configured to communicate with the communication gateway and configured to communicate with the portable device using impulse radio (IR) ultra-wide band (UWB) communication, the communication gateway being configured to instruct the at least one sensor to perform two-way ranging using IR UWB communication with the portable device in a designated time slot after pairing between the communication gateway and the portable device is completed;
a localization module in communication with the communication gateway and configured to determine a location of the portable device based on the two-way ranging performed by the at least one sensor; and
a passive entry/passive start (PEPS) system configured to receive the location of the portable device from the localization module and to perform a vehicle function including at least one of unlocking a door of the vehicle, unlocking a trunk of the vehicle, and allowing the vehicle to be started based on the location of the portable device.

2. The system of claim 1 , wherein the at least one sensor is configured to communicate signal information, based on the two-way ranging with the portable device, to the communication gateway, the signal information including at least one of a received signal strength, a time of arrival, a time difference of arrival, or an angle of arrival of a two-way ranging communication signal between the at least one sensor and the portable device and wherein the localization module is additionally configured to determine the location of the portable device based on the signal information.

3. The system of claim 1 , further comprising at least one additional sensor configured to receive connection information about the BLE communication connection from the communication gateway, to eavesdrop on the BLE communication connection based on the connection information, and to measure signal information about at least one communication signal sent from the portable device to the communication gateway, wherein the localization module is additionally configured to receive the signal information and determine the location of the portable device based on the signal information from the BLE communication connection as well as based on the two-way ranging with the portable device.

4. The system of claim 3 , wherein the signal information includes at least one of a received signal strength, a time of arrival, a time difference of arrival, and an angle of arrival of the at least one communication signal sent from the portable device to the communication gateway.

5. The system of claim 1 , wherein the at least one sensor communicates with the communication gateway using at least one of a wired connection to the communication gateway, a wireless IR UWB connection with the communication gateway, and via communication through the portable device.

6. The system of claim 1 , wherein the at least one sensor performs the two-way ranging by communicating with an IR UWB tag at least one of attached to and integrated with the portable device, wherein the portable device is configured to communicate with the IR UWB tag.

7. The system of claim 1 , wherein the at least one sensor includes a first sensor and a second sensor and wherein the first sensor is configured to perform two-way ranging using IR UWB communication with the portable device in a first designated time slot after the pairing between the communication gateway and the portable device and the second sensor is configured to perform two-way ranging using IR UWB communication with the portable device in a second designated time slot after the pairing between the communication gateway and after the first designated time slot.

8. The system of claim 1 , wherein the localization module and the communication gateway are included in a single electronic control unit.

9. A method comprising:
establishing, with a communication gateway in a vehicle, a Bluetooth low energy (BLE) communication connection with a portable device;
instructing, with a communication gateway, at least one sensor configured to communicate with the portable device using impulse radio (IR) ultra-wide band (UWB) communication to perform two-way ranging using IR UWB communication with the portable device in a designated time slot after pairing between the communication gateway and the portable device is completed;
performing, with the at least one sensor, two-way ranging using IR UWB communication with the portable device;
determining, with a localization module, a location of the portable device based on the two-way ranging performed by the at least one sensor;
receiving, with a passive entry/passive start (PEPS) system, the location of the portable device from the localization module; and
performing, with the PEPS system, a vehicle function including at least one of unlocking a door of the vehicle, unlocking a trunk of the vehicle, allowing the vehicle to be started, and activating a wireless charging station in the vehicle based on the location of the portable device.

10. The method of claim 9 , further comprising:
communicating, with the at least one sensor, signal information, based on the two-way ranging with the portable device, to the communication gateway, the signal information including a received signal strength of a two-way ranging communication signal between the at least one sensor and the portable device; and
determining, with the localization module, the location of the portable device additionally based on the signal information.

11. The method of claim 9 , further comprising:
receiving, with at least one additional sensor, connection information about the BLE communication connection from the communication gateway;
eavesdropping, with the at least one additional sensor, on the BLE communication connection based on the connection information;
measuring, with the at least one additional sensor, signal information about at least one communication signal sent from the portable device to the communication gateway;
receiving, with the localization module, the signal information; and
determining, with the localization module, the location of the portable device based on the signal information from the BLE communication connection as well as the two-way ranging with the portable device.

12. The method of claim 11 , wherein the signal information includes a received signal strength of the at least one communication signal sent from the portable device to the communication gateway.

13. The method of claim 9 , wherein the at least one sensor communicates with the communication gateway using at least one of a wired connection to the communication gateway, a wireless IR UWB connection with the communication gateway, and via communication through the portable device.

14. The method of claim 9 , wherein performing, with the at least one sensor, the two-way ranging includes communicating with an IR UWB tag attached to the portable device, wherein the portable device is configured to communicate with the IR UWB tag.

15. The method of claim 9 , wherein the at least one sensor includes a first sensor and a second sensor and wherein performing the two-way ranging includes performing, with the first sensor, two-way ranging using IR UWB communication with the portable device in a first designated time slot after the pairing between the communication gateway and the portable device and performing, with the second sensor, two-way ranging using IR UWB communicatio

Assignees

• Denso Int America Inc
• Denso Corp

Inventors

• Golsch Kyle
• Sute Steven

Classifications

• G07C2209/63

  Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle · CPC title

• G07C9/00309 Primary

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

• H04W4/48

  for in-vehicle communication · CPC title

• G01S5/04

  Position of source determined by a plurality of spaced direction-finders · CPC title

• B60R25/2018

  Central base unlocks or authorises unlocking · CPC title