Patent ID: 7318159
Filing Date: 2008-01-08
Classification: H04W

Abstract:
1. A method for detecting a copied international mobile equipment identity in a mobile system in which at least one international mobile subscriber identity and a mobile equipment identity is associated with a mobile station, the method comprising; creating a database containing records which each contain a mobile equipment identity associated with a mobile station and at least one mobile subscriber identity, the mobile station transmitting the mobile equipment identity associated with the mobile station and at least one mobile subscriber identity, checking first whether there is a record in the database, which contains a mobile equipment identity corresponding to the mobile equipment identity transmitted by the mobile station, and if there is said record in the database, checking further in response to said record being found whether the record includes a mobile subscriber identity corresponding to the mobile subscriber identity transmitted by the mobile station, and, if there is no record in the database, producing at least a signal indicating that the mobile equipment identity is possibly a copied one.