Abstract: A method is provided for determining a master time signal, in particular in a vehicle. The method includes the acts of: a) receiving at least one first server time signal from a first time server; b) receiving at least one second server time signal from a second time server; c) comparing the first server time signal with the second server time signal in order to determine at least one first time difference; d) storing the first time difference; e) determining an availability of the first server time signal and/or of the second server time signal; f) using the stored first time difference to determine the master time signal at least if at least one of the server time signals is not available.

Abstract: A method is provided for determining a master time signal, in particular in a vehicle. The method includes the acts of: a) receiving at least one first server time signal from a first time server; b) receiving at least one second server time signal from a second time server; c) comparing the first server time signal with the second server time signal in order to determine at least one first time difference; d) storing the first time difference; e) determining an availability of the first server time signal and/or of the second server time signal; f) using the stored first time difference to determine the master time signal at least if at least one of the server time signals is not available.

Abstract: A method is provided for monitoring software in a road vehicle. The software has a plurality of code sections and each code section carries out at least one function. The method includes detecting whether an unexpected event has occurred during the execution of one of the code sections, the unexpected event being caused by the execution of the code in the code section, and/or checking whether a software section has been manipulated. The method transmits a message to a central unit outside the road vehicle if the unexpected event is detected and/or if it is detected that a software section has been manipulated. The method receives an instruction from the central unit to change the method of operation of the software in response to the detection of the unexpected event and/or the manipulation of the software section; and changes the method of operation of the software, while the software is being executed, in response to the instruction.

Abstract: A method is provided for communicating between a vehicle and a central unit, wherein, based on a time base, the central unit transmits a message to the vehicle. Based on the message, a functionality is activated or deactivated in the vehicle. A corresponding central unit as well as a corresponding vehicle for carrying out the method are disclosed.

Abstract: A method is provided for communicating between a vehicle and a central unit, wherein, based on a time base, the central unit transmits a message to the vehicle. Based on the message, a functionality is activated or deactivated in the vehicle. A corresponding central unit as well as a corresponding vehicle for carrying out the method are disclosed.