Granted Patent B2

US 12,425,997 · App. 17/922,957 · Granted Sep 23, 2025

Inventor: Alexander Krebs (Munich, DE)

Assignee: Bayerische Motoren Werke Aktiengesellschaft

H04W56/002H04L69/28H04L7/00H04L2027/0097H04L27/2655

Abstract

Claims (29)

1. A method for adapting a time synchronization between a mobile device and a transceiver module of a plurality of transceiver modules, wherein the method is performed by the transceiver module, the method comprising:

listening, in at least some of a plurality of time slots, for a time synchronization signal from a further transceiver module of the plurality of transceiver modules, wherein the plurality of transceiver modules are arranged at different positions in a vehicle, wherein each time slot of the plurality of time slots is allocated to a corresponding transceiver module of the plurality of transceiver modules;

adapting the time synchronization when a received time synchronization signal has a higher estimated accuracy than the time synchronization between the mobile device and the transceiver module; and

transmitting a time synchronization signal for the further transceiver modules based at least in part on the time synchronization between the mobile device and the transceiver module; and

adapting an estimated accuracy of the time synchronization based at least in part on a length of time since the last adaptation of the time synchronization, based at least in part on an estimated accuracy of the time synchronization signal on which the last adaptation of the time synchronization is based, and based at least in part on an accuracy of a clock of the transceiver module.

2. The method as claimed in claim 1 , further comprising listening, in a predefined time slot, for a time synchronization signal from the mobile device.

3. The method as claimed in claim 2 , wherein the listening for the time synchronization signal from the mobile device is performed when the estimated accuracy of the time synchronization is less than a threshold value.

4. The method as claimed in claim 1 , further comprising adapting, based at least in part on the adapted time synchronization, a time period intended for receiving signals by a transceiver of the transceiver module.

5. A method for adapting a time synchronization between a mobile device and a transceiver module of a plurality of transceiver modules, wherein the method is performed by the transceiver module, the method comprising:

listening, in at least some of a plurality of time slots, for a time synchronization signal from a further transceiver module of the plurality of transceiver modules, wherein the plurality of transceiver modules are arranged at different positions in a vehicle, wherein each time slot of the plurality of time slots is allocated to a corresponding transceiver module of the plurality of transceiver modules;

adapting the time synchronization when a received time synchronization signal has a higher estimated accuracy than the time synchronization between the mobile device and the transceiver module; and

transmitting a time synchronization signal for the further transceiver modules based at least in part on the time synchronization between the mobile device and the transceiver module, adapting, based at least in part on the adapted time synchronization, a time period intended for receiving signals by a transceiver of the transceiver module,

wherein the time period intended for receiving signals by the transceiver is adapted, for receiving a positioning signal from the mobile device, based at least in part on the adapted time synchronization.

6. The method as claimed in claim 1 , wherein the time synchronization signal from the further transceiver module is based on an ultra-wideband transmission technology, and/or wherein a time synchronization signal from the mobile device is based on an ultra-wideband transmission technology or a Bluetooth transmission technology.

7. The method as claimed in claim 5 , wherein the plurality of transceiver modules are arranged at different positions in a vehicle.

8. A transceiver module comprising:

one or more processors; and

one or more transceivers, wherein the transceiver module is configured to adapt a time synchronization between a mobile device and the transceiver module by:

listening by means of a transceiver of the one or more transceivers, in at least some of a plurality of time slots, for a time synchronization signal from a further transceiver module of a plurality of transceiver modules, wherein each time slot of the plurality of time slots is allocated to a corresponding transceiver module of the plurality of transceiver modules, wherein the plurality of transceiver modules comprises the transceiver module;

adapting the time synchronization when a received time synchronization signal has a higher estimated accuracy than the time synchronization between the mobile device and the transceiver module; and

transmitting, by means of the transceiver, a time synchronization signal for the further transceiver module based at least in part on the time synchronization between the mobile device and the transceiver module; and

wherein the transceiver module is further configured to adapt an estimated accuracy of the time synchronization between the mobile device and the transceiver module based at least in part on a length of time since the last adaptation of the time synchronization, based at least in part on an estimated accuracy of the time synchronization signal on which the last adaptation of the time synchronization is based, and based at least in part on an accuracy of a clock of the transceiver module.

9. The transceiver module of claim 8 , wherein the received time synchronization signal and the transmitted time synchronization signal comprise information about an estimated accuracy of a time synchronization signal concerned.

10. The transceiver module of claim 8 , wherein the transceiver module is further configured to adapt an estimated accuracy of the time synchronization between the mobile device and the transceiver module by listening, in a predefined time slot, for a time synchronization signal from the mobile device.

11. The transceiver module of claim 10 , wherein the transceiver module is configured to listen for the time synchronization signal from the mobile device when an estimated accuracy of the time synchronization is less than a threshold value.

12. The transceiver module of claim 8 , wherein the transceiver module is further configured to adapt an estimated accuracy of the time synchronization between the mobile device and the transceiver module by adapting, based at least in part on the adapted time synchronization, a time period intended for receiving signals by a transceiver of the transceiver module.

13. The transceiver module of claim 12 , wherein the time period intended for receiving signals by the transceiver is adapted, for receiving a positioning signal from the mobile device, based at least in part on the adapted time synchronization.

14. The transceiver module of claim 8 , wherein the time synchronization signal from the further transceiver module is based on an ultra-wideband transmission technology, and/or wherein a time synchronization signal from the mobile device is based on an ultra-wideband transmission technology or a Bluetooth transmission technology.

15. The transceiver module of claim 8 , wherein the plurality of transceiver modules are arranged at different positions in a vehicle.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (25)