Method for activation of at least one security function of a security system of a vehicle

A security system of a vehicle including:

• at least one communication device of the vehicle for communication with a transceiver device of a mobile identification transmitter,
• at least one processing device of the vehicle,
• wherein an approach of the mobile identification transmitter to the vehicle is monitored, and an initiating of a distance determination is performed when the approach is detected,
• wherein at least one distance information about a distance of the mobile identification transmitter from the vehicle is determined for the distance determination in that the communication is evaluated, and
• the distance information is evaluated by the processing device, whereby a localization of the mobile identification transmitter relative to at least one security zone is effected,
• wherein a security information for the security system is determined dependent upon the localization;
• wherein the distance information is determined in that a first communication between a first transceiver unit (321) of the transceiver device (310) and a first communication unit (31) of the communication device (20) is evaluated, wherein a second communication between a second transceiver unit (322) of the transceiver device (310) and a second communication unit (32) of the communication device (20) is used for the monitoring of the approach and initiation of the distance determination, wherein the first communication is carried out by means of ultra-wideband and the second communication is carried out by means of short-range wireless communication.

A mobile identification transmitter for the authentication at a security system (200) of a vehicle, wherein wireless communication is performed between the mobile identification transmitter and a communication device of the vehicle, wherein a first transceiver unit for performing a first communication with a first communication unit of the vehicle, and a second transceiver unit for performing a second communication with a second communication unit of the vehicle are provided;

• wherein at least one distance information about a distance of the mobile identification transmitter from the vehicle is determined for the distance determination in that the communication is evaluated, and
• the distance information is evaluated by the processing device, whereby a localization of the mobile identification transmitter relative to at least one security zone is effected,
• wherein a security information for the security system is determined dependent upon the localization;
• wherein the distance information is determined in that a first communication between a first transceiver unit (321) of the transceiver device (310) and a first communication unit (31) of the communication device (20) is evaluated, wherein a second communication between a second transceiver unit (322) of the transceiver device (310) and a second communication unit (32) of the communication device (20) is used for the monitoring of the approach and initiation of the distance determination, wherein the first communication is carried out by means of ultra-wideband and the second communication is carried out by means of short-range wireless communication.