1. A method for performing face recognition in a telecommunication system comprising a central repository in which face recognition profiles attached to subscribers signed up for face recognition have been stored, the method comprising: detecting proximity between at least two subscribers of the subscribers signed up for face recognition, said at least two subscribers being located within a radio coverage area controlled by a network node; migrating face recognition profiles attached to said at least two subscribers, from the central repository to the network node; and generating in the network node, an extended synthetic gallery for each migrated face recognition profile.