Patent ID: 8736418

Claim:
A method for controlling access to secure areas or installations via access systems by a central device storing information about positions of the access systems, comprising: transmitting a service request, including an identification, from a mobile device to the central device, receiving by a central device; and performing, by the central device after receiving the service request, initiating localization of the mobile device to obtain a result indicating one of a geographical area and a geographical position of the mobile device from a radio cell in a radio-cell-oriented mobile network in which the mobile device is currently registered, or using network-internal positioning methods, or with the aid of a GPS function in the mobile device; identifying an access system from among the access systems where the mobile device is located, based on the result of the localization of the mobile device and the positions of the access systems; checking, based on the identification, whether the user of the mobile device is authorized to get access via the identified access system; and enabling physical access to a secure area or installation by a user in possession of the mobile device, by making the identified access system unlocked, if said checking validates authorization.