Method and apparatus in a telecommunications network

Abstract

A method in a cellular telecommunications network in which at least one Localized Service Area, LSA, has been specified, each LSA comprising one or more cells, comprises the steps of determining if information regarding an LSA has been changed, identifying at least one subscriber belonging to this LSA, and transmitting change information to said at least one subscriber belonging to the LSA to upgrade information on a SIM card held by this subscriber. Preferably an indicator is set to indicate if the subscriber belonging to the LSA needs the update information for the type of change made and transmitting update information only if there is such a need. For example, the list of cells belonging to an LSA only needs to be updated if cell information is stored on the SIM card. A node for carrying out the method is also disclosed.

Dependencies are inferred from the claim text.