A method and apparatus to detect a copied Subscriber Identity in a Mobile Communications Network

摘要

A method and apparatus that implement the method for detecting the copying of an international mobile subscriber identity (IMSI) in a mobile communications network in which the location of mobile stations is updated in at least one register (HLR, VLR) of the net. According to the method, the amount (N) of at least one type of location updates. (advantageously between mobile switching center) it is monitored within a predetermined monitoring period (for example 24). This quantity (N) is compared with a predetermined threshold value (Nmax),If your location update value exceeds the preset threshold (nmax),It will produce a lovely overweight signal.