US 12,462,627 B2
Method for ascertaining a current distance between a motor vehicle and a mobile electronic identification device
Konrad Betz, Stuttgart (DE); Matthias Reinhardt, Sindelfingen (DE); and Özgür Mutlu, Stuttgart (DE)
Assigned to MERCEDES-BENZ GROUP AG, Stuttgart (DE)
Appl. No. 18/578,837
Filed by MERCEDES-BENZ GROUP AG, Stuttgart (DE)
PCT Filed Jun. 8, 2022, PCT No. PCT/EP2022/065535
§ 371(c)(1), (2) Date Jan. 12, 2024,
PCT Pub. No. WO2023/285035, PCT Pub. Date Jan. 19, 2023.
Claims priority of application No. 10 2021 003 617.4 (DE), filed on Jul. 13, 2021.
Prior Publication US 2024/0321027 A1, Sep. 26, 2024
Int. Cl. G07C 9/00 (2020.01); G01S 5/02 (2010.01); H04W 4/40 (2018.01)
CPC G07C 9/00309 (2013.01) [G01S 5/0284 (2013.01); H04W 4/40 (2018.02); G07C 2009/00412 (2013.01); G07C 2209/63 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method, comprising:
a) transmitting, from a first transmission and reception device of a transmission and reception system of a motor vehicle to an identification device via a first wireless communication connection, at least one signal containing a transmission time of the at least one signal;
b) storing, in the identification device, the transmission time and a reception time of the at least one signal received by the identification device; and
c1) transmitting, from the identification device to the motor vehicle via a second wireless communication connection, a data packet the transmission and reception time of the at least one signal transmitted in step a);
c2) receiving, by a second transmission and reception device of the transmission and reception system of the motor vehicle, the data packet transmitted from the identification device;
c3) transmitting, by the second transmission and reception device of the transmission and reception system of the motor vehicle via a wired communication connection to the first transmission and reception device of the transmission and reception system of the motor vehicle, the received data packet transmitted from the identification device; and
d) determining, by the first transmission and reception device of the transmission and reception system of the motor vehicle, a current distance between the identification device and the motor vehicle based on the transmission and reception time of the received data packet transmitted from the identification device,
wherein the motor vehicle is unlockable by the identification device,
wherein the first wireless communication connection operates according to a UWB standard and the second wireless communication connection operates according to the BLE standard, and
wherein a maximum range of the first communication connection is shorter than a maximum range of the second communication connection.