Patent ID: 6600916
Filing Date: 2003-07-29
Classification: H04W

Abstract:
A method for protecting a subscriber identity module in a mobile station, which comprises:providing a network portion for establishing a radio communication network with mobile stations; using a subscriber identity module to identify a mobile subscriber associated with a particular one of the mobile stations; when the particular one of the mobile stations is moved from an initial supply area to a new supply area, using the particular one of the mobile stations to initiate updating of the management of the mobile station; subsequently, canceling subscriber data, associated with the particular one of the mobile stations, stored in a previously responsible subscriber database at the network portion; transmitting a radio paging message from the network portion to mobile stations in the initial supply area; and if at least one of the mobile stations in the initial supply area responds to the radio paging message and transmits a mobile subscriber identity, using the network portion to evaluate the mobile subscriber identity that has been received from the at least one of the mobile stations.