US 12,335,811 B2
Method for authorizing access to a motor vehicle by means of a mobile electronic identification transmitter
Konrad Betz, Stuttgart (DE); Matthias Reinhardt, Sindelfingen (DE); and Marco Leicht, Neuhausen (DE)
Assigned to MERCEDES-BENZ GROUP AG, Stuttgart (DE)
Appl. No. 18/578,832
Filed by MERCEDES-BENZ GROUP AG, Stuttgart (DE)
PCT Filed Jun. 8, 2022, PCT No. PCT/EP2022/065538
§ 371(c)(1), (2) Date Jan. 12, 2024,
PCT Pub. No. WO2023/285036, PCT Pub. Date Jan. 19, 2023.
Claims priority of application No. 10 2021 003 616.6 (DE), filed on Jul. 13, 2021.
Prior Publication US 2024/0323644 A1, Sep. 26, 2024
Int. Cl. H04W 4/02 (2018.01); B60R 25/24 (2013.01); G07C 9/00 (2020.01); H04W 12/08 (2021.01)
CPC H04W 4/023 (2013.01) [B60R 25/24 (2013.01); G07C 9/00309 (2013.01); H04W 12/08 (2013.01); G07C 2009/00357 (2013.01); G07C 2209/63 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for authorizing access to a motor vehicle by a mobile electronic identification transmitter, wherein the vehicle is unlockable by the mobile electronic identification transmitter, wherein the mobile electronic identification transmitter communicates in a data-transmitting manner with the motor vehicle both via a first wireless communication connection, which works with a UWB standard, and via a second wireless communication connection, which works with a BLE standard, wherein a maximum range of the first wireless communication connection is shorter than a maximum range of the second wireless communication connection, the method comprising:
a) monitoring a decrease in signal strength of the second wireless communication connection, while the mobile electronic identification transmitter is moved away from the motor vehicle, such that a spacing between the motor vehicle and the mobile electronic identification transmitter increases;
b) storing a current signal strength of the second wireless communication connection as a reference value as soon as the first wireless communication connection between the motor vehicle and the mobile electronic identification transmitter is deactivated or interrupted; and
c) reactivating the first wireless communication connection so soon as a signal strength of the second wireless communication connection exceeds the stored reference value due to the decreasing spacing between the motor vehicle and mobile electronic identification transmitter when the mobile electronic identification transmitter is moved towards the motor vehicle again.