Method for door or tailgate operation in a vehicle, authentication element and vehicle

A method for door or tailgate operation in a transportation vehicle, wherein the transportation vehicle is equipped with an access control device configured to determining whether an operating person is present within a monitoring range around the transportation vehicle using an authentication element, wherein the access control device is equipped with at least one communication module for wireless communication with the authentication element, the method comprising:

• transmitting access authorization information from the authentication element to the access control device;
• checking the transmitted access authorization information in the access control device;
• granting access to the access control device in response to verification of the access authorization information,
• determining whether the operating person is located in the immediate vicinity of the door or tailgate to be operated;
• determining whether the operating person performs an operating movement in the immediate vicinity for the door or tailgate operation;
• triggering the door or tailgate operating procedure in response to the performance of the operating movement being verified,
• wherein the authentication element transmits consecutive UWB signals during the approach to the transportation vehicle and the signals are answered by the at least one communication module, and
• wherein, for checking whether the operating person performs a learned operating movement in the immediate vicinity for the door or tailgate operation, a preselection of a number less than a total of learned operating movements is made in which the authentication element selects the preselection of learned operating movements which are valid for an associated communication module on the transportation vehicle whose communication with the authentication element consecutively results in the shortest propagation time measurement to compare against movement of the operating person.